EP0496685A1 - Method and device for preparing, transferring and applying continuously a fluid aqueous mineral cleaning down suspension - Google Patents

Method and device for preparing, transferring and applying continuously a fluid aqueous mineral cleaning down suspension Download PDF

Info

Publication number
EP0496685A1
EP0496685A1 EP92420025A EP92420025A EP0496685A1 EP 0496685 A1 EP0496685 A1 EP 0496685A1 EP 92420025 A EP92420025 A EP 92420025A EP 92420025 A EP92420025 A EP 92420025A EP 0496685 A1 EP0496685 A1 EP 0496685A1
Authority
EP
European Patent Office
Prior art keywords
suspension
mixing zone
zone
kneading
hopper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92420025A
Other languages
German (de)
French (fr)
Other versions
EP0496685B1 (en
Inventor
Patrick Boehm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cambio Nome 1o Titolare omniplastic Comptoir Des M
Original Assignee
OMNIPLASTIC SA
SERVABOEHM
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by OMNIPLASTIC SA, SERVABOEHM filed Critical OMNIPLASTIC SA
Publication of EP0496685A1 publication Critical patent/EP0496685A1/en
Application granted granted Critical
Publication of EP0496685B1 publication Critical patent/EP0496685B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/10—Maintenance of mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/1238—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices
    • B28C5/1292—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers for materials flowing continuously through the mixing device and with incorporated feeding or discharging devices with rotating stirring and feeding or discharging means fixed on the same axis, e.g. in an inclined container fed at its lower part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/21—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by their rotating shafts
    • B01F27/2123—Shafts with both stirring means and feeding or discharging means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/61—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis about an inclined axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/62—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis comprising liquid feeding, e.g. spraying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/56—General build-up of the mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/56—General build-up of the mixers
    • B01F35/561—General build-up of the mixers the mixer being built-up from a plurality of modules or stacked plates comprising complete or partial elements of the mixer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71775—Feed mechanisms characterised by the means for feeding the components to the mixer using helical screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
    • B28C5/10—Mixing in containers not actuated to effect the mixing
    • B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
    • B28C5/14—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis
    • B28C5/145—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a horizontal or substantially horizontal axis with several mixing chambers arranged one after the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/50—Mixing receptacles

Definitions

  • the invention relates to a process for the preparation, transfer and continuous application of a homogeneous and slightly aerated fluid aqueous suspension containing powdery mineral materials, at least one hydraulic binder and possibly other known constituents, intended for the field of building and public works, in particular the leveling of surfaces.
  • the invention also relates to a device for the preparation, transfer and continuous application of a fluid, homogeneous and weakly aerated aqueous suspension containing powdery mineral materials, at least one hydraulic binder and possibly other known constituents used. works in the field of building and public works.
  • fluid aqueous suspensions from dry powdery mineral materials, which can have up to approximately micrometric dimensions, associated with at least one hydraulic binder and with possible other known constituents, can only be carried out through devices adapted to this type of treatment, and not through already existing devices for other applications, arranged by a simple transposition of means.
  • This preparation must be done by the homogeneous dispersion of a pulverulent solid phase in a liquid phase which is water, by automatic mixing.
  • the solid pulverulent phase of the aqueous suspension to be prepared is formed, in the majority of cases, of dry materials to be mixed or already premixed, which are, for example, mineral fillers, sands, mortars and / or cements, plasters , materials used in finishing plasters, or even in smoothing fluids intended to smooth surfaces in the building sector.
  • dry materials to be mixed or already premixed which are, for example, mineral fillers, sands, mortars and / or cements, plasters , materials used in finishing plasters, or even in smoothing fluids intended to smooth surfaces in the building sector.
  • the rotation of the "pigtail” screw in the female casing allows the continuous transfer by discharge of said aqueous mineral suspension, through a flexible tube connected to the pump.
  • this type of device is causing annoying disadvantages for the user which make its operation incompletely satisfactory for the preparation, transfer and application of fluid, homogeneous and poorly aerated aqueous mineral suspensions. .
  • a first disadvantage is the slight inclination (10 to 15 degrees relative to the horizontal plane) of the axis common to the descending rotary conveyor, to the mixing zone of the mixture of dry pulverulent materials and water, and to the pump. eccentric screw allowing the suspension thus prepared to be sent. Consequently, this slight slope favors the flooding of the descending rotary conveyor when a backflow of water occurs from the mixing zone.
  • deposits of moistened materials are formed on the walls of the Archimedes screw of said conveyor, deposits which can harden by solidification and reduce the flow of dry powdery materials, but which can also detach and release under the form of crusts or agglomerates in the mixing zone.
  • Another disadvantage lies in the fact that the agitator of the mixing zone, in the form of a rectangular frame, is driven along an axis which is not coaxial with that of the envelope of said zone, so that it there are manifested regions without agitation in which hard deposits occur on the walls of the envelope leading to the same negative effects as those mentioned above with regard to the heterogeneity of the fluid aqueous suspension collected and of the device to be dismantled and cleaned.
  • a final disadvantage is caused by the accidental inclusion of air in the fluid aqueous suspension being formed.
  • the interstitial air present in the powdery mineral materials is entrained at the same time as the latter in the conveyor by a pump effect, due to the seal established between the Archimedes screw and its envelope. Consequently, this gaseous phase, which can escape, is included in the aqueous mineral suspension and constitutes for certain applications, in particular that of leveling surfaces, a major defect by the appearance of gaseous bubbles, very annoying, during the implementation of the suspension.
  • the object of the invention is to create a process and a device for preparing, transferring and applying a homogeneous, fluid, slightly aerated aqueous mineral suspension, meeting the assigned objectives and avoiding the drawbacks demonstrating in the state of the art.
  • the hopper for storing the mixture of powdery mineral materials, hydraulic binders and possibly other known constituents, of frustoconical or frusto-pyramidal shape is placed directly above the mixing zone and, in this way works by gravity. Upstream of its outlet orifice, the hopper is provided with a movable screen allowing to regulate the quantities of pulverulent dry matter to be delivered continuously.
  • the mixing zone which is not of vertical design, but whose axis is inclined relative to the horizontal plane, is (unlike the devices of the known art, except those of vertical design), supplied directly by the hopper, that is to say that it operates without the intermediary of a conveyor, such as an Archimedes screw in a cylindrical envelope.
  • a conveyor such as an Archimedes screw in a cylindrical envelope.
  • the mixing zone of downward inclination formed of a cylindrical envelope and of a coaxial mixing member, is of more restricted dimensions than in the devices of the known art.
  • the hopper feeds the mixing zone directly, i.e. it operates without the intermediary of a conveyor, such as a screw 'Archimedes in a cylindrical envelope.
  • the advantage of such a system lies in the fact that in the absence of any movement of the kneading member, the mixture of dry powdery materials is delivered, according to a natural slope of landslide, favored by the inclination of the axis of the mixing zone relative to the horizontal plane.
  • the mixing zone of downward inclination formed of a cylindrical envelope and of a coaxial mixing member, is of more restricted dimensions than in the devices of the known art.
  • the deliberately compacted mixing zone does not have any transfer intermediary for its supply of dry powdery materials: its supply orifice is therefore subject to the outlet orifice of the hopper. More than that, the kneading member extends over the entire length of the kneading zone and, thanks to this, sweeps the outlet opening of the hopper.
  • the kneading member constantly requests the incoming flow of powdery dry matter, quickly puts it in contact with the aqueous phase (thanks to its rotational movement and the downward inclination of the kneading zone), carries out the suspension aqueous pulverulent matter which travels immediately towards the downstream part of the mixing zone.
  • This mixing zone is also provided with a water supply, preferably placed laterally or on the upper part of the envelope and substantially in its middle part, the quantity of which is determined and controlled. (depending on the type of suspension to be prepared) by appropriate adjustment and control means.
  • the aqueous mineral suspension quickly prepared, has neither the time to incorporate air, nor that to rise, nor that to settle on the walls of the envelope, the latter being in particular subjected to a quasi-permanent scraping by the kneading member.
  • a non-return member for said materials is placed and a set of seals mounted on the drive shaft of the kneading member, which They also act as means of preventing the aspiration of air from upstream of the mixing zone.
  • the kneading member can be chosen from the group consisting of rotary frame agitators, with anchor also comprising all other known means of stirring, the constituent elements of which are shaped to vigorously stir the suspension during formation, to clear the walls. of the envelope cylindrical of the mixing zone and conduct the suspension downstream of said zone. At the outlet of the mixing zone, an eccentric screw pump is installed coaxially which continuously sucks the suspension in said zone and discharges it under pressure into a second mixing zone having the property of making the suspension homogeneous, and of the refine without airing it.
  • This second mixing zone according to the invention is provided with a shearing member.
  • This member can be chosen from the group consisting of link chains, one end of which is subject to the drive shaft, the other being free, by rotary turbines with sabers, blades, propellers comprising a or several branches located on one or more stages, the branch or branches of each stage being able to be angularly offset with respect to the branches of the other stages, the or at least one of the branches of each stage being able to be connected to at least one branches of the other stages by mechanical connecting elements, the said turbines being associated or not with fixed chicane plates mounted on the periphery of the envelope of said zone to increase the shearing phenomenon imposed on the suspension.
  • This second mixing zone which works under pressure can also be provided with a filtration member placed between the shearing member and the outlet orifice of said zone.
  • the axis of the single shaft simultaneously driving in rotation the kneading member of the first kneading zone, the eccentric screw pump and the shearing member of the second kneading zone, is inclined relative to the horizontal plane d 'An angle chosen in the range from 20 to 35 degrees, all the rotary members being made integral with each other by quick assembly articulated assemblies.
  • the transfer and application members of the fluid, homogeneous and weakly aerated aqueous mineral suspension which are constituted by pipes with quick couplings, and means known spreading, for transferring said suspension of the device according to the invention to the site of use.
  • the device according to the invention makes it possible to supply operating sites distant at most 200 meters horizontally and at most 50 meters vertically.
  • This device is all the more interesting as all the constituent parts are quickly and easily removable, and it is preferably equipped with a motor operating at a voltage of 220 volts.
  • FIGS. 1, 2 and 3 The invention will be better understood thanks to the illustrative description of one of the embodiments represented by FIGS. 1, 2 and 3.
  • Figure 1 is a schematic presentation of the device, object of the invention in a vertical section.
  • FIG. 2 is a perspective view of a means of rapid assembly and disassembly of the semi-bayonet type of all the members constituted by the eccentric screw pump and the second mixing zone on the first mixing zone.
  • FIG. 3 is a perspective view of a means for rapid assembly and disassembly of the bayonet type of the assembly of members constituted by the eccentric screw pump and the second mixing zone on the first mixing zone.
  • the aforementioned members and means mounted in series and driven in a rotational movement to participate in the preparation of the desired suspension, its transfer and its application are mechanically driven by the torque formed by the motor (11) and the reducer (12) - (operating at 220 volts).
  • the hopper (1) which generally works by gravity, is provided with a grid (13) which can be the seat of vibrations (controlled for example by the motor 11), said grid allowing the retention of the agglomerates present within the materials. solids used in the preparation of the suspension.
  • the hopper (1) can be provided with a vibration or agitation means making it possible to avoid the formation of a vault when using certain materials having the property of forming clods.
  • the lower part of the hopper (1) opens directly into the mixing zone (3), vertical to the mixing member (5).
  • the kneading zone (3) is supplied with water, in a continuous manner and in appropriate quantities through the orifice (4), said orifice being downstream of a water supply circuit with all the instruments for measuring and regulating the flow (not shown in the figure).
  • the mixture of solids and water is subjected to a methodical mixing by means of the mixing member (5), said member in the case of the figure being a frame stirrer .
  • the respective amounts of water and the mixture of solid materials (from the hopper) introduced into the mixing zone are adjusted relative to each other in such a way that the concentration of dry matter in the mineral suspension aqueous fluid prepared continuously, which corresponds to the desired value, is invariant during application to the site.
  • the fluid aqueous mineral suspension enters the eccentric screw pump (6) for sending under pressure.
  • This pressurized delivery pump is preferably formed by a rigid central body (14) and by a deforming envelope (15) matching the shape of the rigid body.
  • the eccentric screw pump (6) for sending under pressure opens into the second mixing zone (7) provided with a shearing member (8), which is preferably a rotary turbine with blades between which are fixed plates ( 16) mounted on the periphery of said zone. Consequently, the fluid aqueous mineral suspension leaving under pressure from the eccentric screw pump (6) is taken up under high shear and therefore homogenized and refined within the zone (7).
  • a shearing member (8) which is preferably a rotary turbine with blades between which are fixed plates ( 16) mounted on the periphery of said zone. Consequently, the fluid aqueous mineral suspension leaving under pressure from the eccentric screw pump (6) is taken up under high shear and therefore homogenized and refined within the zone (7).
  • the second mixing zone (7) of the fluid aqueous mineral suspension opens out through the filter (9) onto the transfer and application members (10), said members being connected to said area by means of the nozzle (17 ) and the quick coupling system (18) for transferring the aqueous and fluid mineral suspension from the device according to the invention to the site of use via a flexible pipe.
  • the single shaft (19) which simultaneously rotates the kneading member (5), the eccentric screw pump (6) and the shearing member (8) of the second kneading zone (7), is inclined 30 degrees from the horizontal plane. It is made mechanically integral with the motor (11) -reducer (12), by the coupling (20), and integrally drives the above-mentioned rotary members by virtue of well-known quick-assembly articulated assemblies.
  • non-return member (21) of pulverulent materials formed of a very short element of Archimedes screw. 'a length of about two steps, and a set of seals (22) protecting the coupling (20) and the geared motor group from any material outlet, but also from any air intake.
  • the upstream end of the first mixing zone (3) (and thereby the mixing zone itself) is made easily accessible by tilting the motor (11) -reducer (12) group thanks to its rotation around the shaft (23) according to the arrow (24), after the upper locking means (25) have been released.
  • the shaft (19) of the first mixing zone immediately uncouples from the coupling (20), during the tilting of the aforementioned geared motor group, thanks to the presence of the articulated quick-assembly assemblies of known type (not shown) .
  • the kneading member (5) can be easily extracted from the kneading zone (3), by the upstream end of said zone, the uncoupling of said kneading member from the pump (6) being effected very easily thanks to the presence of the articulated quick-assembly assemblies already mentioned.
  • the downstream end of the first mixing zone (3) can also be very easily separated from the eccentric screw pump (6) and from the second mixing zone (7) by uncoupling said first zone (3) by releasing the clamping means (26) of the assembly rods (27).
  • one or the other constituent parts of the device according to the invention are easy to clean because they are quickly accessible and completely removable, even in the simplest mechanical parts.
  • the device according to the invention is mounted by interlocking on a rigid foldable but light chassis in the shape of a cross, the arms (28 and 29) of which support wheels (30) and rollers (31) allowing it to be moved.
  • FIG. 2 shows, in a perspective view, a means of instantaneous mounting and dismounting of the semi-bayonet type of the assembly constituted by the pump (6) and the second mixing zone (7) on the downstream orifice of the first mixing zone (3), via an assembly slot for static lashing and a quick coupler attachment for dynamic lashing.
  • this assembly comprises, in addition to the eccentric screw pump (6) and the second mixing zone (7), a flange (32) provided with an orifice (33) having a diameter identical or equivalent to the diameters of the orifices. outlet of the first mixing zone (3) and inlet (6) of the eccentric screw pump.
  • This flange has two top (34) and bottom (35) lugs and lateral ears (36 and 37).
  • the flange (32) is coaxially placed in sealed contact with the inlet port of the pump (6) then it is secured to the above-mentioned assembly by means of the clamping rods (38 and 39) integral with the second mixing zone (7), provided with a rapid clamping means.
  • the monobloc assembly comprising the flange (32), the eccentric screw pump (6) and the second mixing zone (7), is easily secured to the first mixing zone (3) thanks to a fixing means of the semi-bayonet type.
  • the bottom lug (35) of the flange (32) is engaged in the assembly slot (41), or static lashing , secured to the mixing zone (3) by a slight rotational movement.
  • the high lug (34) of the flange (32) is gripped by the quick eccentric attachment (42), or dynamic lashing, located on the upper part of the envelope of said zone (3).
  • the assembly and disassembly of the monobloc assembly is made extremely simple and rapid, as well as access to the mixing zone (3) and to its mixing member. (5).
  • the constituent elements of the monobloc assembly that is to say the eccentric screw pump (6)
  • the second mixing zone (7) can be quickly separated, making their access quick and easy by a reverse procedure of that described by practicing the undocking of said assembly by loosening the quick eccentric fastener (42) and a rotational movement to disengage the bottom lug (35) from the assembly slot (41).
  • the flange (32) is released from its position in contact with the inlet orifice of the pump (6) by dismantling the clamping rods (38 and 39).
  • FIG. 3 shows, in a perspective view, a means of instantaneous mounting and dismounting of the bayonet type of the assembly constituted by the pump (6) and the second mixing zone (7) on the downstream orifice of the first mixing (3) by means of assembly slots secured to the first mixing zone and ears secured to said assembly.
  • the aforementioned assembly which comprises the eccentric screw pump (6) and the second mixing zone (7) is made in one piece by the presence of a flange (43), provided with an orifice (44) of identical or equivalent diameter to the diameters of the outlet orifices (40) of the first mixing zone (3) and of the inlet (25) of the eccentric screw pump (6) (not shown).
  • the flange (43) is coaxially placed in sealed contact with the inlet port of the pump (6) then it is secured to the assembly formed by the pump (6) and of the second mixing zone (7) (not shown) by means of the clamping rods (38 and 39) integral with the second mixing zone (7), and provided with a rapid clamping means.
  • the one-piece assembly comprising the flange (43), the pump (6) and the second mixing zone (7) is easily secured to the first mixing zone (3) by means of fixing means of the bayonet type.
  • the monobloc assembly is therefore presented axially opposite the outlet orifice (40) of the mixing zone (3) and in contact with it, in such a way that by rotation, the lug (45) of the flange (43) is located below the slot (47) integral with the envelope of the mixing zone (3), and that the lug (46) of said flange, is located above the slot (48) also secured to said envelope.
  • the ears (45 and 46) are engaged in the slots (47 and 48).
  • the flange (43) is then tightly pressed against the orifice of outlet (40) from zone (3), the shaft (19) of the pump (6) (not shown) automatically engaging in the shaft of the kneading member (5) of said zone (3) by a well known quick assembly articulated assembly (not shown).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Detergent Compositions (AREA)

Abstract

Method and device for preparing, transferring and applying a homogenous aqueous mineral suspension, which is fluid and slightly aerated containing pulverulent mineral materials, at least one binder and, possibly other known constituents, through a stage of forming the suspension, in a first mixing zone (3), a stage of pressurising using a pump with an eccentric screw (6), which is characterised in that before its transfer and application to the site, the suspension is subjected to a second mixing stage (7). Method and device are implemented in the fields of building and public works, especially for cleaning down surfaces. <IMAGE>

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

L'invention concerne un procédé de préparation, de transfert et d'application en continu d'une suspension aqueuse fluide homogène et faiblement aérée, contenant des matériaux minéraux pulvérulents, au moins un liant hydraulique et éventuellement d'autres constituants connus, destinée au domaine du bâtiment et des travaux publics, notamment au ragréage des surfaces.The invention relates to a process for the preparation, transfer and continuous application of a homogeneous and slightly aerated fluid aqueous suspension containing powdery mineral materials, at least one hydraulic binder and possibly other known constituents, intended for the field of building and public works, in particular the leveling of surfaces.

L'invention concerne également un dispositif pour la préparation, le transfert et l'application en continu d'une suspension aqueuse fluide, homogène et faiblement aérée contenant des matériaux minéraux pulvérulents, au moins un liant hydraulique et éventuellement d'autres constituants connus mis en oeuvre dans le domaine du bâtiment et des travaux publics.The invention also relates to a device for the preparation, transfer and continuous application of a fluid, homogeneous and weakly aerated aqueous suspension containing powdery mineral materials, at least one hydraulic binder and possibly other known constituents used. works in the field of building and public works.

ARRIERE PLAN DE L'INVENTIONBACKGROUND OF THE INVENTION

La préparation de suspensions aqueuses fluides, à partir de matériaux minéraux pulvérulents secs, pouvant avoir jusqu'à environ des dimensions micrométriques, associés à au moins un liant hydraulique et à d'éventuels autres constituants connus, ne peut se réaliser qu'à travers des dispositifs adaptés à ce type de traitement, et non pas à travers des dispositifs déjà existants pour d'autres applications, aménagés par une simple transposition de moyens.The preparation of fluid aqueous suspensions, from dry powdery mineral materials, which can have up to approximately micrometric dimensions, associated with at least one hydraulic binder and with possible other known constituents, can only be carried out through devices adapted to this type of treatment, and not through already existing devices for other applications, arranged by a simple transposition of means.

Cette préparation doit se faire par la dispersion homogène d'une phase solide pulvérulente dans une phase liquide qui est de l'eau, par mélange automatique.This preparation must be done by the homogeneous dispersion of a pulverulent solid phase in a liquid phase which is water, by automatic mixing.

La phase solide pulvérulente de la suspension aqueuse à préparer est formée, dans la majorité des cas, de matériaux secs à mélanger ou déjà prémélangés, qui sont, par exemple, des charges minérales, des sables, des mortiers et/ou ciments, des plâtres, des matériaux intervenant dans les enduits de finition, ou encore dans les fluides de lissage destinés à ragréer les surfaces dans le domaine du bâtiment.The solid pulverulent phase of the aqueous suspension to be prepared is formed, in the majority of cases, of dry materials to be mixed or already premixed, which are, for example, mineral fillers, sands, mortars and / or cements, plasters , materials used in finishing plasters, or even in smoothing fluids intended to smooth surfaces in the building sector.

De nombreux dispositifs ont déjà été proposés pour la préparation, le transfert et l'application d'une suspension aqueuse fluide telle que celle évoquée.Many devices have already been proposed for the preparation, transfer and application of a fluid aqueous suspension such as that mentioned.

Un premier type de dispositif connu dont la fonction se limite au transfert et l'application d'une suspension minérale aqueuse telle qu'un enduit fluide de lissage par exemple, comporte :

  • d'abord un conteneur ouvert, doté d'un moyen d'agitation recevant la suspension minérale aqueuse à transférer et à appliquer, préalablement préparée hors du dispositif.
  • ensuite un organe de refoulement mécanique associé à la cuve ouverte se composant d'un moteur d'entraînement et d'une pompe à vis excentrique assujettie au moteur. La pompe à vis est formée par un corps central rigide mâle du type "queue de cochon" et par une enveloppe déformante femelle épousant la forme de l'élément mâle.
A first type of known device, the function of which is limited to the transfer and application of an aqueous mineral suspension such as a fluid smoothing coating for example, comprises:
  • first an open container, provided with a stirring means receiving the aqueous mineral suspension to be transferred and applied, previously prepared outside the device.
  • then a mechanical delivery member associated with the open tank consisting of a drive motor and an eccentric screw pump secured to the motor. The screw pump is formed by a rigid male central body of the "pigtail" type and by a female deforming envelope conforming to the shape of the male element.

La rotation de la vis "queue de cochon" dans l'enveloppe femelle permet le transfert en continu par refoulement de ladite suspension minérale aqueuse, à travers une tubulure souple raccordée à la pompe.The rotation of the "pigtail" screw in the female casing allows the continuous transfer by discharge of said aqueous mineral suspension, through a flexible tube connected to the pump.

Un tel type de dispositif présente cependant des désavantages qui peuvent rendre son exploitation délicate , voire sans attrait car :

  • il nécessite la préparation, hors du dispositif, de la suspension minérale aqueuse à transférer et appliquer, le conteneur ouvert n'étant qu'une zone tampon.
  • il se crée dans le conteneur ouvert des zones non soumises à agitation et de ce fait il se produit une certaine sédimentation au sein de la suspension minérale en donnant des dépôts difficiles à éliminer.
  • il se produit des entraînements mécaniques sporadiques de ces dépôts dans la pompe qui en perturbent le fonctionnement, peuvent la détériorer, et gênent considérablement le bon fonctionnement du transfert et de l'application de la suspension quand ils passent à travers la pompe.
However, such a device has disadvantages which can make its operation difficult, even unattractive because:
  • it requires the preparation, outside the device, of the aqueous mineral suspension to be transferred and applied, the open container being only a buffer zone.
  • it is created in the open container of the areas not subjected to agitation and therefore there is a certain sedimentation within the mineral suspension giving deposits difficult to remove.
  • sporadic mechanical entrainments of these deposits occur in the pump which disturb their operation, can deteriorate it, and considerably hamper the proper functioning of the transfer and application of the suspension when they pass through the pump.

Un autre type de dispositif (brevet FR 1.572.335) comporte :

  • une trémie de stockage des matériaux pulvérulents secs, dotée d'un agitateur à encre, fonctionnant par gravité et débouchant dans :
  • un convoyeur rotatif ascendant constitué d'une vis d'Archimède tournant dans une enveloppe cylindrique prélevant les matériaux pulvérulents dans la trémie pour alimenter :
  • une zone de malaxage tubulaire dotée d'un agitateur et d'une entrée d'eau, fonctionnant dans le sens descendant, zone dans laquelle s'effectue la préparation de la suspension minérale aqueuse fluide par le mélange des phases solides pulvérulentes sèches et liquides, débouchant dans :
  • une pompe à vis excentrique entraînée coaxialement par l'arbre de l'agitateur de la zone de malaxage qui refoule la suspension minérale aqueuse à travers une tubulure souple jusqu'au site d'exploitation.
Another type of device (patent FR 1,572,335) includes:
  • a storage hopper for dry powdery materials, equipped with an ink stirrer, operating by gravity and opening into:
  • an ascending rotary conveyor consisting of an Archimedes screw rotating in a cylindrical envelope taking the powdery materials from the hopper to feed:
  • a tubular mixing zone with an agitator and a water inlet, working in the downward direction, zone in which the preparation of the fluid aqueous mineral suspension by mixing the dry powdery solid and liquid phases, leading to:
  • an eccentric screw pump driven coaxially by the agitator shaft of the mixing zone which delivers the aqueous mineral suspension through flexible tubing to the operating site.

De nombreux inconvénients se manifestent dans le cas de ce deuxième type de dispositif :

  • un premier inconvénient apparaît à travers la nécessité de disposer de deux moteurs éléctriques, augmentant les risques d'incidents, en particulier de coordination des fonctions et élevant également les coûts de production.
  • un deuxième inconvénient réside dans le fait d'un cheminement compliqué des matériaux minéraux pulvérulents secs par un convoyeur rotatif ascendant, depuis la base de la cuve de stockage jusqu'à la tête de la zone de malaxage.
  • un autre inconvénient se manifeste par le fait que le convoyeur ascendant des matériaux minéraux pulvérulents secs véhicule une quantité desdits matériaux supérieure à celle consommée dans la zone de malaxage, obligeant ainsi au recyclage de l'excès dans la partie haute de la trémie. Il apparaît alors un risque d'inondation rapide et simultanée du convoyeur et de la trémie quand se produit un refoulement d'eau de la zone de malaxage, risque qui impose l'arrêt du dispositif, son démontage (qui est complexe) et son nettoyage (ainsi que celui de la trémie) pour éviter les encroutages ou la prise en masse, entraînant des pertes de temps conséquentes.
Many disadvantages appear in the case of this second type of device:
  • a first drawback appears through the need to have two electric motors, increasing the risk of incidents, in particular coordination of functions and also raising production costs.
  • a second drawback lies in the fact of a complicated routing of dry powdery mineral materials by an ascending rotary conveyor, from the base of the storage tank to the head of the mixing zone.
  • another drawback is manifested by the fact that the ascending conveyor of dry powdery mineral materials conveys a quantity of said materials greater than that consumed in the mixing zone, thus forcing the recycling of the excess in the upper part of the hopper. There then appears a risk of rapid and simultaneous flooding of the conveyor and the hopper when a backflow of water from the mixing zone occurs, a risk which requires the device to be stopped, dismantled (which is complex) and cleaned. (as well as that of the hopper) to avoid encrustation or solidification, resulting in significant loss of time.

Enfin, un autre inconvénient gênant qui apparaît à la sortie de la pompe à vis excentrée, se manifeste sous l'aspect d'une certaine hétérogénéité dans la composition de la suspension aqueuse guide prête à l'emploi, celle-ci comportant des agglomérats durs ou d'une consistance supérieure à celle de la suspension, qui proviennent de dépôts se formant sur les parois de la zone de malaxage, et qui sont à l'origine de défauts lors de la mise en oeuvre sur chantier de ladite suspension.Finally, another annoying drawback which appears at the outlet of the eccentric screw pump, manifests itself under the appearance of a certain heterogeneity in the composition of the ready-to-use aqueous guide suspension, the latter comprising hard agglomerates or of a consistency greater than that of the suspension, which come from deposits forming on the walls of the kneading zone, and which are at the origin of faults during the implementation on site of said suspension.

Un autre type de dispositif connu (brevet DE 3 809 661), destiné à la préparation d'une suspension aqueuse par dispersion dans l'eau de matériaux pulvérulents de construction, comporte successivement:

  • une trémie de stockage des matériaux pulvérulents secs, fonctionnant par gravité ;
  • un convoyeur rotatif descendant constitué par une vis d'Archimède (revêtue de caoutchouc), tournant d'une manière relativement étanche dans une enveloppe cylindrique, ledit convoyeur étant alimenté par la base de la trémie ;
  • une zone de malaxage dans laquelle s'effectue la dispersion de la phase pulvérulente sèche dans de l'eau, cette zone étant dotée d'une alimentation en eau et d'un agitateur mélangeur, coaxial et solidaire de la vis d'Archimède du convoyeur ;
  • une pompe à vis excentrée, coaxiale et solidaire de l'agitateur de la zone de malaxage, enfin,
  • un arbre d'entraînement animé par un seul moto-réducteur assurant en commun le mouvement de rotation du convoyeur à vis, de l'agitateur mélangeur et de la pompe à vis excentrée, tous ces moyens étant coaxiaux et solidaires les uns des autres, cet arbre étant incliné par rapport au plan horizontal d'un angle compris entre 10° et 15°.
Another known type of device (patent DE 3,809,661), intended for the preparation of an aqueous suspension by dispersion in water of pulverulent construction materials, successively comprises:
  • a storage hopper for dry powdery materials, operating by gravity;
  • a descending rotary conveyor constituted by an Archimedes screw (coated with rubber), rotating in a relatively tight manner in a cylindrical envelope, said conveyor being fed by the base of the hopper;
  • a mixing zone in which the dispersion of the dry pulverulent phase takes place in water, this zone being provided with a water supply and a mixing agitator, coaxial and integral with the Archimedes screw of the conveyor ;
  • an eccentric screw pump, coaxial and integral with the agitator of the mixing zone, finally,
  • a drive shaft driven by a single gear motor ensuring in common the rotational movement of the screw conveyor, the agitator mixer and the eccentric screw pump, all these means being coaxial and integral with each other, this shaft being inclined relative to the horizontal plane by an angle between 10 ° and 15 °.

De même que dans les cas précédents, ce type de dispositif est à l'origine de désavantages gênants pour l'utilisateur qui rendent son exploitation incomplètement satisfaisante pour la préparation, le transfert et l'application de suspensions minérales aqueuses fluides, homogènes et faiblement aérées.As in the previous cases, this type of device is causing annoying disadvantages for the user which make its operation incompletely satisfactory for the preparation, transfer and application of fluid, homogeneous and poorly aerated aqueous mineral suspensions. .

Un premier désavantage est la faible inclinaison (10 à 15 degrés par rapport au plan horizontal) de l'axe commun au convoyeur rotatif descendant, à la zone de malaxage du mélange des matériaux pulvérulents secs et de l'eau, et à la pompe à vis excentrée permettant l'envoi de la suspension ainsi préparée. Dès lors, cette faible pente favorise l'inondation du convoyeur rotatif descendant quand un refoulement d'eau se produit à partir de la zone de malaxage. Dans ce cas, des dépôts de matériaux humidifiés se constituent sur les parois de la vis d'Archimède dudit convoyeur, dépôts qui peuvent durcir par prise en masse et diminuer le débit en matériaux pulvérulents secs, mais qui peuvent aussi se détacher et relarguer sous la forme de croutes ou d'agglomérats dans la zone de malaxage. Un tel relargage conduit à une suspension hétérogène dans sa composition et à une détérioration prématurée des organes de la pompe à vis excentrée par les agglomérats pris en masse. Il oblige au démontage et au nettoyage de l'ensemble du dispositif en provoquant une perte de temps considérable au cours de l'exploitation.A first disadvantage is the slight inclination (10 to 15 degrees relative to the horizontal plane) of the axis common to the descending rotary conveyor, to the mixing zone of the mixture of dry pulverulent materials and water, and to the pump. eccentric screw allowing the suspension thus prepared to be sent. Consequently, this slight slope favors the flooding of the descending rotary conveyor when a backflow of water occurs from the mixing zone. In this case, deposits of moistened materials are formed on the walls of the Archimedes screw of said conveyor, deposits which can harden by solidification and reduce the flow of dry powdery materials, but which can also detach and release under the form of crusts or agglomerates in the mixing zone. Such release leads to a heterogeneous suspension in its composition and to premature deterioration of the organs of the eccentric screw pump by the agglomerates taken in bulk. It requires disassembly and cleaning of the entire device, causing a considerable loss of time during operation.

Un autre désavantage qui pourtant devrait se manifester comme un avantage, est l'importance des dimensions du convoyeur rotatif et de la zone de malaxage (volume sensiblement équivalent à celui de la trémie d'alimentation), ces grandes dimensions permettant un temps de malaxage beaucoup plus important (environ 5 fois plus) que dans les dispositifs antérieurement cités et une vitesse de rotation de l'agitateur de la zone de malaxage plus faible (160 à 200 tours/mn).Another disadvantage which, however, should manifest itself as an advantage, is the importance of the dimensions of the rotary conveyor and the mixing zone (volume substantially equivalent to that of the feed hopper), these large dimensions allowing a considerable mixing time. higher (approximately 5 times more) than in the previously mentioned devices and a lower speed of rotation of the agitator of the mixing zone (160 to 200 rpm).

Car les caractéristiques dimensionnelles de la zone de malaxage, la vitesse lente de l'agitateur de ladite zone et la faible inclinaison de l'axe d'entrainement de l'ensemble provoquent les mêmes effets que ceux évoqués antérieurement, c'est à dire des encroutages, des relargages qui conduisent à une suspension minérale aqueuse présentant des hétérogénéités dans sa composition. Il en découle l'obligation de démonter et de nettoyer le dispositif, ceci provoquant des pertes de temps conséquentes.Because the dimensional characteristics of the mixing zone, the slow speed of the agitator in said zone and the small inclination of the drive axis of the assembly cause the same effects as those mentioned above, that is to say inlays, releases which lead to an aqueous mineral suspension having heterogeneities in its composition. This results in the obligation to dismantle and clean the device, this causing significant loss of time.

Un autre désavantage réside dans le faite que l'agitateur de la zone de malaxage, en forme de cadre rectangulaire, est entraîné selon un axe qui n'est pas coaxial avec celui de l'enveloppe de ladite zone, de telle sorte qu'il s'y manifeste des régions dépourvues d'agitation dans lesquelles se produisent des dépôts durs sur les parois de l'enveloppe conduisant aux mêmes effets négatifs que ceux évoqués précédemment à l'égard de l'hétérogénéité de la suspension aqueuse fluide recueillie et du dispositif qu'il faut soumettre à démontage et nettoyage.Another disadvantage lies in the fact that the agitator of the mixing zone, in the form of a rectangular frame, is driven along an axis which is not coaxial with that of the envelope of said zone, so that it there are manifested regions without agitation in which hard deposits occur on the walls of the envelope leading to the same negative effects as those mentioned above with regard to the heterogeneity of the fluid aqueous suspension collected and of the device to be dismantled and cleaned.

Un dernier désavantage est provoqué par l'inclusion accidentelle d'air dans la suspension aqueuse fluide en formation.
En effet, l'air interstitiel présent dans les matériaux minéraux pulvérulents est entraîné en même temps que ceux-ci dans le convoyeur par un effet de pompe, en raison de l'étanchéité établie entre la vis d'Archimède et son enveloppe. Dès lors, cette phase gazeuse, quine peut s'échapper, est incluse dans la suspension minérale aqueuse et constitue pour certaines applications, en particulier celle de ragréage de surfaces, un défaut majeur par l'apparition de bulles gazeuses, très gênantes, lors de la mise en oeuvre de la suspension.A final disadvantage is caused by the accidental inclusion of air in the fluid aqueous suspension being formed.
In fact, the interstitial air present in the powdery mineral materials is entrained at the same time as the latter in the conveyor by a pump effect, due to the seal established between the Archimedes screw and its envelope. Consequently, this gaseous phase, which can escape, is included in the aqueous mineral suspension and constitutes for certain applications, in particular that of leveling surfaces, a major defect by the appearance of gaseous bubbles, very annoying, during the implementation of the suspension.

Enfin, un autre type de dispositif connu (brevet DE 2 437 231) destiné à la production d'un mortier aéré par dispersion de matériaux minéraux pulvérulents dans une phase aqueuse comporte en un empilement vertical fonctionnant par gravité :

  • une trémie de stockage des matériaux pulvérulents secs, dotée d'un agitateur mécanique;
  • une zone de malaxage verticale coaxiale et solidaire de la trémie, munie d'un moyen d'agitation et d'une alimentation en eau, dans laquelle s'effectue la préparation de la suspension aqueuse des matériaux minéraux pulvérulents par dispersion dans l'eau.
  • une pompe à vis excentrée, coaxiale et solidaire du moyen d'agitation de la zone de malaxage, munie d'un injecteur d'air comprimé, pour réaliser le bullage du mortier ;
  • une chambre de turbulence, dotée d'un agitateur à grande vitesse entraîné par le rotor de la pompe à vis excentrée, d'un dispositif tubulaire d'extraction du mortier, et d'un injecteur d'air comprimé (s'il n'est pas monté sur la pompe ou en complément de celui-ci) dans laquelle s'effectue sous pression le mélange de l'air et du mortier.
  • enfin, un arbre d'entrainement vertical animé par un seul moto-réducteur (tournant à environ 400 tours par minute) assurant le mouvement de rotation, dans la trémie de stockage, dans la zone de malaxage de la pompe à vis excentrée et de l'agitateur de la chambre de turbulence.
Finally, another type of known device (patent DE 2,437,231) intended for the production of an aerated mortar by dispersion of powdery mineral materials in an aqueous phase comprises in a vertical stack operating by gravity:
  • a storage hopper for dry powdery materials, fitted with a mechanical agitator;
  • a vertical mixing zone coaxial and integral with the hopper, provided with a stirring means and with a water supply, in which the aqueous suspension of the pulverulent mineral materials is prepared by dispersion in water.
  • an eccentric screw pump, coaxial and integral with the stirring means of the mixing zone, provided with a compressed air injector, for bubbling the mortar;
  • a turbulence chamber, equipped with a high speed agitator driven by the rotor of the eccentric screw pump, a tubular device for extracting the mortar, and a compressed air injector (if there is no is not mounted on the pump or in addition to it) in which the mixture of air and mortar is carried out under pressure.
  • finally, a vertical drive shaft driven by a single gear motor (rotating at around 400 revolutions per minute) ensuring the rotational movement, in the storage hopper, in the mixing zone of the eccentric screw pump and the turbulence chamber agitator.

Ce type de dispositif présente sensiblement les mêmes inconvénients que ceux déjà énoncés dans les dispositifs précités.
Cependant, des inconvénients autres s'y ajoutent :

  • un premier inconvénient autre se manifeste dans le faite que ce dispositif ne peut fonctionner que dans une position verticale, sous une grande vitesse de rotation (au moins 400 tours par minute), avec une alimentation en eau placée à la jonction de la base de la trémie de stockage et de la tête de la zone de malaxage. Cette disposition particulière entraîne un risque supplémentaire d'un refoulement d'eau par projection dans la trémie pouvant provoquer la formation de dépôts sur les parois, préjudiciables au fonctionnement correct du dispositif. Mais un tel refoulement peut aussi se produire en cas d'engorgement du dispositif tubulaire d'évacuation du mortier, ou d'un débit insuffisant de la pompe à vis excentrée, par exemple.
  • un deuxième inconvénient autre, qui rend l'exploitation d'un tel dispositif illusoire pour la préparation d'une suspension aqueuse fluide et homogène faiblement chargée en gaz, apparaît dans sa fonction particulière qui est celle d'injecter de l'air dans la suspension pour la réalisation d'un mortier fortement aéré. Bien plus, un tel dispositif dont l'injection d'air comprimé serait éliminé, conduirait encore à la formation d'une suspension minérale aqueuse hétérogène et pratiquement pas débarrassée de l'air entraîné par les matériaux minéraux pulvérulents en raison de sa position verticale et de la présence d'un agitateur dans la trémie de stockage qui favorise la descente des matériaux pulvérulents, empêche l'échappement de la phase gazeuse incluse et crée une pression mécanique dans la zone de malaxage favorable à l'inclusion de ladite phase gazeuse.
This type of device has substantially the same drawbacks as those already set out in the aforementioned devices.
However, other disadvantages are added:
  • a first other disadvantage is manifested in the fact that this device can only operate in a vertical position, under a high speed of rotation (at least 400 revolutions per minute), with a water supply placed at the junction of the base of the storage hopper and head of the mixing area. This particular arrangement involves an additional risk of a backflow of water by projection into the hopper which can cause the formation of deposits on the walls, detrimental to the correct functioning of the device. However, such a backflow can also occur in the event of blockage of the tubular mortar evacuation device, or of an insufficient flow rate of the eccentric screw pump, for example.
  • a second other drawback, which makes the use of such a device illusory for the preparation of a fluid and homogeneous aqueous suspension weakly charged with gas, appears in its particular function which is that of injecting air into the suspension for the realization of a highly ventilated mortar. Furthermore, such a device from which the injection of compressed air would be eliminated, would also lead to the formation of a heterogeneous aqueous mineral suspension and practically not rid of the air entrained by the powdery mineral materials due to its vertical position and the presence of an agitator in the storage hopper which promotes the descent of the pulverulent materials, prevents the escape of the included gas phase and creates mechanical pressure in the mixing zone favorable to the inclusion of said gas phase.

Dès lors, et afin d'éviter ou au moins d'atténuer les inconvénients précités, les principaux objectifs que vise l'invention peuvent s'énoncer de la manière suivante :

  • d'abord réaliser in situ une suspension minérale aqueuse homogène et fluide, d'une manière contrôlée afin qu'il y ait maintien tout au long d'une application de la qualité de la suspension mise en oeuvre sur le chantier ;
  • ensuite, créer un dispositif de préparation, de transfert et d'application d'une suspension minérale aqueuse consommant au fur et à mesure de sa préparation la suspension à mettre en oeuvre et ne produisant que la quantité nécessaire à la réalisation du chantier ;
  • après, créer un dispositif compact et facilement maniable dont les moyens de préparation de la suspension minérale aqueuse homogène et fluide, de son transfert et de son application, soient dans un enchaînement technologique tel qu'il ne se produise pas de phénomène d'encroutage et de sédimentation et qu'ainsi l'organe d'envoi de la dite suspension soit protégé de toutes détériorations accidentelles (autres que l'usure normale) provoquées par la présence d'agglomérats sédimenteux lui faisant perdre puissance et efficacité et obligeant à une réforme précoce et coûteuse ;
  • puis, créer un dispositif tel que la suspension minérale aqueuse homogène et fluide qui arrive sur le site de l'application, après son passage dans l'organe d'envoi, soit dotée de toutes les caractéristiques souhaitées pour réaliser ladite application, c'est à dire (et par exemple) son homogénéité, la régularité de la granulométrie de ses composants, sa viscosité, ou autres.
  • de plus, créer un dispositif tel qu'il existe une harmonie adéquate entre les quantités de matières sèches et d'eau introduites pour la préparation de la suspension ainsi que l'aspiration et le refoulement de la suspension à partir de la zone appropriée afin que sa concentration en matière sèche soit régulière dans le temps.
  • ensuite, créer un dispositif tel que la suspension minérale aqueuse homogène et fluide soit exempte au mieux d'air inclus.
  • enfin, créer un dispositif simple et robuste, facilement démontable pour en effectuer le nettoyage et d'une manipulation aisée sur le site d'utilisation
Therefore, and in order to avoid or at least mitigate the aforementioned drawbacks, the main objectives of the invention can be stated as follows:
  • first produce in situ a homogeneous and fluid aqueous mineral suspension, in a controlled manner so that there is maintenance throughout an application of the quality of the suspension used on the site;
  • then create a device for preparing, transferring and applying an aqueous mineral suspension consuming, as it is prepared, the suspension to be used and producing only the quantity necessary for carrying out the work;
  • afterwards, create a compact and easily maneuverable device whose means for preparing the homogeneous and fluid aqueous mineral suspension, for its transfer and its application, are in a technological sequence such that no encrustation phenomenon occurs and sedimentation and thus the sending body of said suspension is protected from any accidental deterioration (other than normal wear and tear) caused by the presence of sediment agglomerates causing it to lose power and efficiency and requiring early reform and expensive;
  • then, to create a device such as the homogeneous and fluid aqueous mineral suspension which arrives at the site of the application, after its passage in the sending member, is endowed with all the desired characteristics to carry out said application, it is to say (and for example) its homogeneity, the regularity of the particle size of its components, its viscosity, or others.
  • in addition, create a device such that there is an adequate harmony between the quantities of dry matter and water introduced for the preparation of the suspension as well as the suction and delivery of the suspension from the appropriate zone so that its dry matter concentration is regular over time.
  • then, create a device such that the homogeneous and fluid aqueous mineral suspension is free at best of air included.
  • finally, create a simple and robust device, easily removable for cleaning and easy handling at the site of use

SOMMAIRE DE L'INVENTIONSUMMARY OF THE INVENTION

Le but de l'invention vise la création d'un procédé et d'un dispositif de préparation, de transfert et d'application d'une suspension minérale aqueuse homogène, fluide, et faiblement aérée, répondant aux objectifs assignés et évitant les inconvénients se manifestant dans l'état de la technique.The object of the invention is to create a process and a device for preparing, transferring and applying a homogeneous, fluid, slightly aerated aqueous mineral suspension, meeting the assigned objectives and avoiding the drawbacks demonstrating in the state of the art.

Le procédé selon l'invention de préparation, de transfert et d'application en continu d'une suspension minérale aqueuse homogène, fluide, et faiblement aérée, contenant des matériaux minéraux pulvérulents, au moins un liant hydraulique et éventuellement d'autres constituants connus, destinée au domaine du bâtiment et des travaux publics, notamment au ragréage de surfaces, selon lequel les matières sèches constitutives et l'eau sont introduites séparément dans une zone de malaxage, puis la suspension formée est véhiculée à travers des zones d'envoi, de transfert et d'application se composant des étapes successives suivantes :

  • a) la formation d'une suspension dans une zone de malaxage dans laquelle sont introduits en quantités réglées les matériaux minéraux pulvérulents constitutifs et l'eau nécessaire à la réalisation,
  • b) la mise sous pression de la suspension minérale aqueuse fluide dans une zone appropriée à son envoi par passage dans une pompe à vis excentrée,
  • c) l'envoi de la suspension par l'intermédiaire de la zone de transfert,
    caractérisé en ce que, selon une combinaison nouvelle, la suspension provenant de l'étape b) de la mise sous pression, est soumise à une action d'affinage par cisaillement dans une deuxième étape de malaxage avant son introduction dans l'étape c) de transfert.
The process according to the invention for the preparation, transfer and continuous application of a homogeneous, fluid, slightly aerated aqueous mineral suspension containing powdery mineral materials, at least one hydraulic binder and possibly other known constituents, intended for the building and public works sector, in particular for leveling surfaces, according to which the constituent dry materials and water are introduced separately into a mixing zone, then the suspension formed is conveyed through sending zones, transfer and application consisting of the following successive steps:
  • a) the formation of a suspension in a mixing zone into which are introduced in regulated quantities the pulverulent mineral materials constituting and the water necessary for the production,
  • b) pressurizing the fluid aqueous mineral suspension in an area suitable for sending it by passage through an eccentric screw pump,
  • c) sending the suspension through the transfer area,
    characterized in that, according to a new combination, the suspension originating from stage b) of the pressurization, is subjected to a refining action by shearing in a second mixing stage before its introduction into stage c) transfer.

Le dispositif selon l'invention de préparation, de transfert et d'application en continu d'une suspension minérale aqueuse fluide, homogène et faiblement aérée, formée à partir du mélange de matériaux minéraux pulvérulents, d'au moins un liant hydraulique et éventuellement d'autres constituants connus, destinée au domaine du bâtiment et des travaux publics, comportant successivement:

  • a) une trémie pour le stockage des matières sèches constitutives de ladite suspension, fonctionnant par gravité ;
  • b) au dessous de la trémie, une zone de malaxage pour la préparation en continu de la suspension minérale aqueuse, munie d'un organe de malaxage, alimentée par gravité en matières sèches selon des quantités adéquates et en eau, par injection selon des quantités contrôlées ;
  • c) à la sortie de la zone de malaxage, une pompe à vis excentrée, organe d'envoi sous pression de la suspension préparée ;
  • d) un arbre unique d'entrainement en rotation de l'organe de malaxage de la zone de préparation de la suspension, de la pompe à vis excentrée par l'intermédiaire d'un ensemble moteur-réducteur, cet arbre étant incliné par rapport à un plan horizontal,
  • e) des organes de transfert et d'applications de la suspension sur le site d'utilisation,
se caractérise en ce que, entre la pompe à vis excentrée c) et les organes de transfert et d'application (e), est placée une deuxième zone de malaxage comportant un organe cisaillement mis en mouvement par l'arbre unique de rotation d) dans laquelle la suspension sous pression est soumise à un affinage et une homogénéisation.The device according to the invention for the preparation, transfer and continuous application of a fluid, homogeneous and slightly aerated aqueous mineral suspension, formed from the mixture of powdery mineral materials, at least one hydraulic binder and optionally d other known constituents, intended for the building and public works sector, comprising successively:
  • a) a hopper for the storage of the dry materials constituting said suspension, operating by gravity;
  • b) below the hopper, a kneading zone for the continuous preparation of the aqueous mineral suspension, provided with a kneading member, fed by gravity with dry materials in adequate quantities and with water, by injection in quantities controlled;
  • c) at the outlet of the mixing zone, an eccentric screw pump, a pressure sending member for the prepared suspension;
  • d) a single shaft for rotating the kneading member of the suspension preparation area, of the eccentric screw pump by means of a motor-reduction unit, this shaft being inclined relative to a horizontal plane,
  • e) organs for transferring and applying suspension to the site of use,
is characterized in that, between the eccentric screw pump c) and the transfer and application members (e), a second mixing zone is placed comprising a shearing member set in motion by the single rotation shaft d) in which the pressure suspension is subjected to refining and homogenization.

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

La trémie de stockage du mélange des matériaux minéraux pulvérulents, liants hydrauliques et éventuellement autres constituants connus, de forme tronconique ou troncpyramidale, est placé directement au dessus de la zone de malaxage et, de cette manière fonctionne par gravité. En amont de son orifice de sortie, la trémie est dotée d'un écran mobile permettant de régler les quantités de matières sèches pulvérulentes à délivrer en continu.The hopper for storing the mixture of powdery mineral materials, hydraulic binders and possibly other known constituents, of frustoconical or frusto-pyramidal shape, is placed directly above the mixing zone and, in this way works by gravity. Upstream of its outlet orifice, the hopper is provided with a movable screen allowing to regulate the quantities of pulverulent dry matter to be delivered continuously.

La zone de malaxage, qui n'est pas de conception verticale, mais dont l'axe est incliné par rapport au plan horizontal, est, (contrairement aux dispositifs de l'art connu, hormis ceux de conception verticale), alimentée en direct par la trémie, c'est à dire qu'elle fonctionne sans l'intermédiaire d'un convoyeur, tel qu'une vis d'Archimède dans une enveloppe cylindrique. L'avantage d'un tel système réside dans le fait, qu'en l'absence de tout mouvement de l'organe de malaxage, le mélange de matières sèches pulvérulentes est délivré, selon un talus naturel d'éboulement, favorisé par l'inclinaison de l'axe de la zone de malaxage par rapport au plan horizontal.The mixing zone, which is not of vertical design, but whose axis is inclined relative to the horizontal plane, is (unlike the devices of the known art, except those of vertical design), supplied directly by the hopper, that is to say that it operates without the intermediary of a conveyor, such as an Archimedes screw in a cylindrical envelope. The advantage of such a system lies in the fact that in the absence of any movement of the kneading member, the mixture of dry powdery materials is delivered, according to a natural slope of landslide, favored by the inclination of the axis of the mixing zone relative to the horizontal plane.

La zone de malaxage d'inclinaison descendante, formée d'une enveloppe cylindrique et d'un organe de malaxage coaxial, est de dimensions plus restreintes que dans les dispositifs de l'art connu.
Contrairement aux autres dispositifs de l'art connu, hormis ceux de conception verticale, la trémie alimente en direct la zone de malaxage, c'est à dire qu'elle fonctionne sans l'intermédiaire d'un convoyeur, tel qu'une vis d'Archimède dans une enveloppe cylindrique. L'avantage d'un tel système réside dans le fait, qu'en l'absence de tout mouvement de l'organe de malaxage, le mélange de matières sèches pulvérulentes est délivré, selon un talus naturel d'éboulement, favorisé par l'inclinaison de l'axe de la zone de malaxage par rapport au plan horizontal.The mixing zone of downward inclination, formed of a cylindrical envelope and of a coaxial mixing member, is of more restricted dimensions than in the devices of the known art.
Unlike other devices in the known art, apart from those of vertical design, the hopper feeds the mixing zone directly, i.e. it operates without the intermediary of a conveyor, such as a screw 'Archimedes in a cylindrical envelope. The advantage of such a system lies in the fact that in the absence of any movement of the kneading member, the mixture of dry powdery materials is delivered, according to a natural slope of landslide, favored by the inclination of the axis of the mixing zone relative to the horizontal plane.

La zone de malaxage d'inclinaison descendante, formée d'une enveloppe cylindrique et d'un organe de malaxage coaxial, est de dimensions plus restreintes que dans les dispositifs de l'art connu. Par différences avec les dispositifs connus, la zone de malaxage volontairement compactée, ne dispose d'aucun intermédiaire de transfert pour son alimentation en matières pulvérulentes sèches : son orifice d'alimentation est donc assujetti à l'orifice de sortie de la trémie.
Plus que cela, l'organe de malaxage s'étend sur toute la longueur de la zone de malaxage et, grâce à cela, balaie l'orifice de sortie de la trémie. Ainsi, l'organe de malaxage sollicite sans cesse le flux entrant des matières sèches pulvérulentes, le met rapidement au contact de la phase aqueuse (grâce à son mouvement de rotation et à l'inclinaison descendante de la zone de malaxage), réalise la suspension aqueuse de matières pulvérulentes qui chemine immédiatement vers la partie avale de la zone de malaxage.The mixing zone of downward inclination, formed of a cylindrical envelope and of a coaxial mixing member, is of more restricted dimensions than in the devices of the known art. Unlike the known devices, the deliberately compacted mixing zone does not have any transfer intermediary for its supply of dry powdery materials: its supply orifice is therefore subject to the outlet orifice of the hopper.
More than that, the kneading member extends over the entire length of the kneading zone and, thanks to this, sweeps the outlet opening of the hopper. Thus, the kneading member constantly requests the incoming flow of powdery dry matter, quickly puts it in contact with the aqueous phase (thanks to its rotational movement and the downward inclination of the kneading zone), carries out the suspension aqueous pulverulent matter which travels immediately towards the downstream part of the mixing zone.

Cette zone de malaxage est également dotée d'une alimentation en eau, préférentiellement placée latéralement ou sur la partie supérieure de l'enveloppe et sensiblement dans sa partie médiane, dont la quantité est déterminée et contrôlée (selon le type de suspension à préparer) par des moyens de réglage et de contrôle appropriés.This mixing zone is also provided with a water supply, preferably placed laterally or on the upper part of the envelope and substantially in its middle part, the quantity of which is determined and controlled. (depending on the type of suspension to be prepared) by appropriate adjustment and control means.

Comme la zone de malaxage du dispositif selon l'invention est d'un volume beaucoup plus restreint que ceux des dispositifs habituellement connus, c'est à dire d'un diamètre beaucoup plus faible (de même que pour l'organe de malaxage), la suspension minérale aqueuse, rapidement préparée, n'a ni le temps d'incorporer de l'air, ni celui de remonter, ni celui de se déposer sur les parois de l'enveloppe, ces dernières étant en particulier soumises à un raclage quasipermanent par l'organe de malaxage.As the kneading area of the device according to the invention is of a much smaller volume than those of the conventionally known devices, that is to say of a much smaller diameter (as for the kneading member), the aqueous mineral suspension, quickly prepared, has neither the time to incorporate air, nor that to rise, nor that to settle on the walls of the envelope, the latter being in particular subjected to a quasi-permanent scraping by the kneading member.

Enfin, grâce à l'inclinaison descendante de la zone de malaxage, à son volume restreint, à son alimentation directe en matières sèches pulvérulentes par la trémie, à la formation rapide de la suspension et à son faible temps de séjour, il apparaît que la combinaison de ces divers moyens favorise l'évacuation ascensionnelle de la phase gazeuse incluse dans les matières sèches pulvérulentes procurant ainsi une suspension aqueuse fluide faiblement aérée.Finally, thanks to the downward inclination of the mixing zone, to its limited volume, to its direct supply of dry powdery materials by the hopper, to the rapid formation of the suspension and to its short residence time, it appears that the combination of these various means promotes the upward evacuation of the gaseous phase included in the pulverulent dry matter, thus providing a weakly aerated fluid aqueous suspension.

En amont de l'orifice d'entrée des matières pulvérulentes dans la première zone de malaxage, sont placés un organe anti-retour pour lesdites matières et un ensemble de joints montés sur l'arbre d'entraînement de l'organe de malaxage, qui interviennent également comme moyens d'empêcher l'aspiration d'air par l'amont de la zone de malaxage.Upstream of the inlet opening for the pulverulent materials in the first mixing zone, a non-return member for said materials is placed and a set of seals mounted on the drive shaft of the kneading member, which They also act as means of preventing the aspiration of air from upstream of the mixing zone.

L'organe de malaxage peut être choisi dans le groupe constitué par les agitateurs rotatifs à cadre, à ancre comportant également tous autres moyens connus de brassage, dont les éléments constitutifs sont façonnés pour brasser énergiquement la suspension en cours de formation, pour dégager les parois de l'enveloppe cylindrique de la zone de malaxage et conduire la suspension vers l'aval de ladite zone.
A la sortie de la zone de malaxage, est implantée coaxialement une pompe à vis excentrée qui aspire en continu la suspension dans ladite zone et la refoule sous pression dans une deuxième zone de malaxage ayant la propriété de rendre homogène la suspension, et de l'affiner sans l'aérer.
Cette deuxième zone de malaxage conforme à l'invention, est dotée d'un organe de cisaillement. Cet organe peut être choisi dans le groupe constitué par les chaînes à maillons dont l'une des extrémités est assujettie à l'arbre d'entraînement, l'autre étant libre, par les turbines rotatives à sabres, à pales, à hélices comportant une ou plusieurs branches implantées selon un ou plusieurs étages, la ou les branches de chaque étage pouvant être décalées angulairement par rapport aux branches des autres étages, la ou l'une au moins des branches de chaque étage pouvant être reliée à l'une au moins des branches des autres étages par des éléments mécaniques de liaison, ledites turbines étant associées ou non à des plaques fixes en chicane montées sur la périphérie de l'enveloppe de ladite zone pour augmenter le phénomène de cisaillement imposé à la suspension.
Cette deuxième zone de malaxage qui travaille sous pression peut être également dotée d'un organe de filtration placé entre l'organe de cisaillement et l'orifice de sortie de ladite zone.
L'axe de l'arbre unique entraînant simultanément en rotation l'organe de malaxage de la première zone de malaxage, la pompe à vis excentrée et l'organe de cisaillement de la deuxième zone de malaxage, est incliné par rapport au plan horizontal d'un angle choisi dans l'intervalle allant de 20 à 35 degrés, tous les organes rotatifs étant rendus solidaires les uns des autres par des assemblages articulés à montage rapide.
Au delà de la deuxième zone de malaxage se trouvent les organes de transfert et d'application de la suspension minérale aqueuse fluide, homogène et faiblement aérée qui sont constitués par des tubulures à raccords rapides, et des moyens d'épandage connus, permettant de transférer ladite suspension du dispositif selon l'invention jusqu'au site d'utilisation.The kneading member can be chosen from the group consisting of rotary frame agitators, with anchor also comprising all other known means of stirring, the constituent elements of which are shaped to vigorously stir the suspension during formation, to clear the walls. of the envelope cylindrical of the mixing zone and conduct the suspension downstream of said zone.
At the outlet of the mixing zone, an eccentric screw pump is installed coaxially which continuously sucks the suspension in said zone and discharges it under pressure into a second mixing zone having the property of making the suspension homogeneous, and of the refine without airing it.
This second mixing zone according to the invention is provided with a shearing member. This member can be chosen from the group consisting of link chains, one end of which is subject to the drive shaft, the other being free, by rotary turbines with sabers, blades, propellers comprising a or several branches located on one or more stages, the branch or branches of each stage being able to be angularly offset with respect to the branches of the other stages, the or at least one of the branches of each stage being able to be connected to at least one branches of the other stages by mechanical connecting elements, the said turbines being associated or not with fixed chicane plates mounted on the periphery of the envelope of said zone to increase the shearing phenomenon imposed on the suspension.
This second mixing zone which works under pressure can also be provided with a filtration member placed between the shearing member and the outlet orifice of said zone.
The axis of the single shaft simultaneously driving in rotation the kneading member of the first kneading zone, the eccentric screw pump and the shearing member of the second kneading zone, is inclined relative to the horizontal plane d 'An angle chosen in the range from 20 to 35 degrees, all the rotary members being made integral with each other by quick assembly articulated assemblies.
Beyond the second kneading zone are the transfer and application members of the fluid, homogeneous and weakly aerated aqueous mineral suspension which are constituted by pipes with quick couplings, and means known spreading, for transferring said suspension of the device according to the invention to the site of use.

Le dispositif selon l'invention permet d'alimenter des sites d'exploitation distants d'au plus 200 mètres en horizontal et d'au plus 50 mètres en vertical. Ce dispositif est d'autant plus intéressant que toutes les parties constitutives sont rapidement et facilement démontables, et qu'il est préférentiellement équipé d'un moteur fonctionnant sous une tension de 220 volts.The device according to the invention makes it possible to supply operating sites distant at most 200 meters horizontally and at most 50 meters vertically. This device is all the more interesting as all the constituent parts are quickly and easily removable, and it is preferably equipped with a motor operating at a voltage of 220 volts.

L'invention sera mieux comprise grâce à la description illustrative de l'un des modes de réalisation représenté par les figures 1, 2 et 3.The invention will be better understood thanks to the illustrative description of one of the embodiments represented by FIGS. 1, 2 and 3.

La figure 1 est une présentation schématique du dispositif, objet de l'invention selon une coupe verticale.Figure 1 is a schematic presentation of the device, object of the invention in a vertical section.

La figure 2 est une vue en perspective d'un moyen de montage et démontage rapide du type semi-baïonnette de l'ensemble des organes constitué par la pompe à vis excentrée et la deuxième zone de malaxage sur la première zone de malaxage.FIG. 2 is a perspective view of a means of rapid assembly and disassembly of the semi-bayonet type of all the members constituted by the eccentric screw pump and the second mixing zone on the first mixing zone.

La figure 3 est une vue en perspective d'un moyen de montage et démontage rapide du type baïonnette de l'ensemble des organes constitué par la pompe à vis excentrée et la deuxième zone de malaxage sur la première zone de malaxage.FIG. 3 is a perspective view of a means for rapid assembly and disassembly of the bayonet type of the assembly of members constituted by the eccentric screw pump and the second mixing zone on the first mixing zone.

Selon l'invention et comme le montre la figure 1, le dispositif de préparation, de transfert et d'application en continu d'une suspension minérale aqueuse fluide est constitué :

  • d'une trémie (1) de stockage d'un mélange sec de matériaux minéraux pulvérulents, d'au moins un liant hydraulique et éventuellement d'autres constituants connus introduits par sacs ;
  • d'un organe de réglage (2) des quantités souhaitées du mélange précité à prélever en continu dans la trémie (1) ;
  • d'une zone (3) de préparation de la suspension minérale aqueuse dite première zone de malaxage, recevant de la trémie (1) les quantités réglées du mélange de matières solides, cette zone étant munie des moyens d'introduction (4) de l'eau et d'un organe de malaxage (5) de la suspension en cours de formation ;
  • d'une pompe à vis excentrée (6), organe d'envoi sous pression de la suspension formée ;
  • d'une deuxième zone de malaxage (7) de la suspension sous pression comportant un organe de cisaillement (8) et un organe de filtration (9) pour affiner et homogénéiser ladite suspension ;
  • enfin d'organes de transfert et d'application (10) de la suspension homogénéisée sur le site d'utilisation.
According to the invention and as shown in FIG. 1, the device for the preparation, transfer and continuous application of a fluid aqueous mineral suspension consists of:
  • a hopper (1) for storing a dry mixture of powdery mineral materials, at least one hydraulic binder and possibly other known constituents introduced by bags;
  • an adjusting member (2) of the desired quantities of the aforementioned mixture to be withdrawn continuously from the hopper (1);
  • a zone (3) for preparing the aqueous mineral suspension known as the first mixing zone, receiving from the hopper (1) the regulated quantities of the mixture of solid materials, this zone being provided with means for introducing (4) the water and a kneading member (5) of the suspension being formed;
  • an eccentric screw pump (6), a member for sending under pressure the suspension formed;
  • a second kneading zone (7) of the suspension under pressure comprising a shearing member (8) and a filtration member (9) for refining and homogenizing said suspension;
  • finally transfer and application organs (10) of the homogenized suspension at the site of use.

Les organes et moyens précités montés en série et animés d'un mouvement de rotation pour participer à la préparation de la suspension souhaitée, à son transfert et son application sont mécaniquement entraînés par le couple formé du moteur (11) et du réducteur (12) - (fonctionnant en 220 volts).The aforementioned members and means mounted in series and driven in a rotational movement to participate in the preparation of the desired suspension, its transfer and its application are mechanically driven by the torque formed by the motor (11) and the reducer (12) - (operating at 220 volts).

La trémie (1), qui fonctionne généralement par gravité, est munie d'une grille (13) qui peut être le siège de vibrations (commandée par exemple par le moteur 11), ladite grille permettant la rétention des agglomérats présents au sein des matériaux solides mis en oeuvre dans la préparation de la suspension.The hopper (1), which generally works by gravity, is provided with a grid (13) which can be the seat of vibrations (controlled for example by the motor 11), said grid allowing the retention of the agglomerates present within the materials. solids used in the preparation of the suspension.

De plus, selon une variante, la trémie (1) peut être dotée d'un moyen de vibration ou d'agitation permettant d'éviter la formation de voûte lors de l'utilisation de certains matériaux ayant la propriété de constituer des mottes.In addition, according to a variant, the hopper (1) can be provided with a vibration or agitation means making it possible to avoid the formation of a vault when using certain materials having the property of forming clods.

La partie basse de la trémie (1) débouche directement dans la zone de malaxage (3), à la verticale de l'organe de malaxage (5).The lower part of the hopper (1) opens directly into the mixing zone (3), vertical to the mixing member (5).

Pendant l'introduction en continu dudit mélange pulvérulent de matières sèches, la zone de malaxage (3) est alimentée en eau, d'une manière continue et selon des quantités appropriées par l'orifice (4), ledit orifice étant en aval d'un circuit d'alimentation en eau doté de tous les instruments de mesure et de réglage du débit (non représenté sur la figure). Au cours de leur introduction simultanée, le mélange des matières solides et de l'eau est soumis à un malaxage méthodique par l'intermédiaire de l'organe de malaxage (5), ledit organe dans le cas de la figure étant un agitateur à cadre.During the continuous introduction of said pulverulent mixture of dry materials, the kneading zone (3) is supplied with water, in a continuous manner and in appropriate quantities through the orifice (4), said orifice being downstream of a water supply circuit with all the instruments for measuring and regulating the flow (not shown in the figure). During their simultaneous introduction, the mixture of solids and water is subjected to a methodical mixing by means of the mixing member (5), said member in the case of the figure being a frame stirrer .

Les quantités respectives d'eau et du mélange des matières solides (provenant de la trémie) introduites dans la zone de malaxage sont réglées l'une par rapport à l'autre d'une manière telle que la concentration en matière sèche de la suspension minérale aqueuse fluide préparée en continu, qui correspond à la valeur souhaitée, est invariante au cours de l'application sur le site.The respective amounts of water and the mixture of solid materials (from the hopper) introduced into the mixing zone are adjusted relative to each other in such a way that the concentration of dry matter in the mineral suspension aqueous fluid prepared continuously, which corresponds to the desired value, is invariant during application to the site.

A partir de la zone de malaxage (3), la suspension minérale aqueuse fluide entre dans la pompe à vis excentrée (6) d'envoi sous pression. Cet pompe d'envoi sous pression est préférentiellement formée par un corps central rigide (14) et par une enveloppe déformante (15) épousant la forme du corps rigide.From the mixing zone (3), the fluid aqueous mineral suspension enters the eccentric screw pump (6) for sending under pressure. This pressurized delivery pump is preferably formed by a rigid central body (14) and by a deforming envelope (15) matching the shape of the rigid body.

La pompe à vis excentrée (6) d'envoi sous pression débouche dans la deuxième zone de malaxage (7) munie d'un organe de cisaillement (8), qui est préférentiellement une turbine rotative à pales entre lesquelles se situent des plaques fixes (16) montées sur la périphérie de ladite zone. Dès lors, la suspension minérales aqueuse fluide sortant sous pression de la pompe à vis excentrée (6) est reprise sous fort cisaillement et de ce fait homogénéisée et affinée au sein de la zone (7).The eccentric screw pump (6) for sending under pressure opens into the second mixing zone (7) provided with a shearing member (8), which is preferably a rotary turbine with blades between which are fixed plates ( 16) mounted on the periphery of said zone. Consequently, the fluid aqueous mineral suspension leaving under pressure from the eccentric screw pump (6) is taken up under high shear and therefore homogenized and refined within the zone (7).

La deuxième zone de malaxage (7) de la suspension minérale aqueuse fluide débouche à travers le filtre (9) sur les organes (10) de transfert et d'applications, lesdits organes étant reliés à ladite zone par l'intermédiaire du piquage (17) et le système de raccord rapide (18) permettant de transférer la suspension minérale aqueuse et fluide du dispositif selon l'invention jusqu'au site d'utilisation par l'intermédiaire d'une canalisation souple.The second mixing zone (7) of the fluid aqueous mineral suspension opens out through the filter (9) onto the transfer and application members (10), said members being connected to said area by means of the nozzle (17 ) and the quick coupling system (18) for transferring the aqueous and fluid mineral suspension from the device according to the invention to the site of use via a flexible pipe.

L'arbre unique (19) qui entraîne simultanément en rotation l'organe de malaxage (5), la pompe à vis excentrée (6) et l'organe de cisaillement (8) de la deuxième zone de malaxage (7), est incliné de 30 degrés par rapport au plan horizontal. Il est rendu mécaniquement solidaire du moteur (11) -réducteur (12), par l'accouplement (20), et entraîne solidairement les organes rotatifs précités grâce à des assemblages articulés à montage rapide bien connus.The single shaft (19) which simultaneously rotates the kneading member (5), the eccentric screw pump (6) and the shearing member (8) of the second kneading zone (7), is inclined 30 degrees from the horizontal plane. It is made mechanically integral with the motor (11) -reducer (12), by the coupling (20), and integrally drives the above-mentioned rotary members by virtue of well-known quick-assembly articulated assemblies.

Dans la partie amont de la première zone de malaxage (3) et montés directement sur l'arbre (19), se trouvent un organe anti-retour (21) des matières pulvérulentes formé d'un élément très court de vis d'Archimède d'une longueur d'environ deux pas, et d'un ensemble de joints (22) protégeant l'accouplement (20) et le groupe moto-réducteur de toute sortie de matière, mais également de toute aspiration d'air.In the upstream part of the first mixing zone (3) and mounted directly on the shaft (19), there is a non-return member (21) of pulverulent materials formed of a very short element of Archimedes screw. 'a length of about two steps, and a set of seals (22) protecting the coupling (20) and the geared motor group from any material outlet, but also from any air intake.

Toutes les parties constitutives du dispositif selon l'invention sont d'un accès simple grâce à une conception mécanique originale permettant un démontage rapide et facile de toutes les parties.All the constituent parts of the device according to the invention are of simple access thanks to an original mechanical design allowing a quick and easy disassembly of all the parts.

L'extrémité amont de la première zone de malaxage (3) (et par là, la zone de malaxage elle-même) est rendue facilement accessible par le basculement du groupe moteur (11)-réducteur (12) grâce à sa rotation autour de l'arbre (23) selon la flèche (24), après qu'ait été libéré le moyen de blocage supérieur (25).The upstream end of the first mixing zone (3) (and thereby the mixing zone itself) is made easily accessible by tilting the motor (11) -reducer (12) group thanks to its rotation around the shaft (23) according to the arrow (24), after the upper locking means (25) have been released.

L'arbre (19) de la première zone de malaxage se désaccouple immédiatement de l'accouplement (20), lors du basculement du groupe moto-réducteur précité, grâce à la présence des assemblages articulés à montage rapide de type connu (non représenté).The shaft (19) of the first mixing zone immediately uncouples from the coupling (20), during the tilting of the aforementioned geared motor group, thanks to the presence of the articulated quick-assembly assemblies of known type (not shown) .

Dès lors, l'organe de malaxage (5) peut être facilement extrait de la zone de malaxage (3), par l'extrémité amont de ladite zone, le désaccouplement dudit organe de malaxage d'avec la pompe (6) s'effectuant très facilement grâce à la présence des assemblages articulés à montage rapide déjà évoqués.Therefore, the kneading member (5) can be easily extracted from the kneading zone (3), by the upstream end of said zone, the uncoupling of said kneading member from the pump (6) being effected very easily thanks to the presence of the articulated quick-assembly assemblies already mentioned.

L'extrémité avale de la première zone de malaxage (3) peut également être très facilement séparée de la pompe à vis excentrée (6) et de la deuxième zone de malaxage (7) en désaccouplant la dite première zone (3) par libération des moyens de serrage (26) des tiges d'assemblage (27).The downstream end of the first mixing zone (3) can also be very easily separated from the eccentric screw pump (6) and from the second mixing zone (7) by uncoupling said first zone (3) by releasing the clamping means (26) of the assembly rods (27).

Ainsi, les unes ou les autres parties constitutives du dispositif selon l'invention sont d'un nettoyage aisé car rapidement accessibles et complètement démontables jusque dans les pièces mécaniques les plus simples.Thus, one or the other constituent parts of the device according to the invention are easy to clean because they are quickly accessible and completely removable, even in the simplest mechanical parts.

Le dispositif selon l'invention est monté par emboîtement sur un châssis rigide repliable mais léger en forme de croix, dont les bras (28 et 29) supportent des roues (30) et roulettes (31) permettant de le mouvoir.The device according to the invention is mounted by interlocking on a rigid foldable but light chassis in the shape of a cross, the arms (28 and 29) of which support wheels (30) and rollers (31) allowing it to be moved.

La figure 2 montre, selon une vue en perspective, un moyen de montage et démontage instantané du type semi-baïonnette de l'ensemble constitué par la pompe (6) et la deuxième zone de malaxage (7) sur l'orifice aval de la première zone de malaxage (3), par l'intermédiaire d'une fente d'assemblage pour l'arrimage statique et d'une fixation à attache rapide pour l'arrimage dynamique.FIG. 2 shows, in a perspective view, a means of instantaneous mounting and dismounting of the semi-bayonet type of the assembly constituted by the pump (6) and the second mixing zone (7) on the downstream orifice of the first mixing zone (3), via an assembly slot for static lashing and a quick coupler attachment for dynamic lashing.

Pour être rendu monobloc, cet ensemble comporte outre la pompe à vis excentrée (6) et la deuxième zone de malaxage (7), une flasque (32) dotée d'un orifice (33) ayant un diamètre identique ou équivalent aux diamètres des orifices de sortie de la première zone de malaxage (3) et d'entrée (6) de la pompe à vis excentrée.To be made in one piece, this assembly comprises, in addition to the eccentric screw pump (6) and the second mixing zone (7), a flange (32) provided with an orifice (33) having a diameter identical or equivalent to the diameters of the orifices. outlet of the first mixing zone (3) and inlet (6) of the eccentric screw pump.

Cette flasque est dotée de deux ergots haut (34) et bas (35) et d'oreilles latérales (36 et 37).This flange has two top (34) and bottom (35) lugs and lateral ears (36 and 37).

Pour contribuer à la formation de l'élément monobloc précitée, comportant la pompe à vis excentrée (6) et la deuxième zone de malaxage (7), la flasque (32) est coaxialement placée en contact étanche avec l'orifice d'entrée de la pompe (6) puis elle est arrimée à l'ensemble précité par l'intermédiaire des tiges de serrage (38 et 39) solidaires de la deuxième zone de malaxage (7), dotées d'un moyen de serrage rapide.To contribute to the formation of the aforementioned one-piece element, comprising the eccentric screw pump (6) and the second mixing zone (7), the flange (32) is coaxially placed in sealed contact with the inlet port of the pump (6) then it is secured to the above-mentioned assembly by means of the clamping rods (38 and 39) integral with the second mixing zone (7), provided with a rapid clamping means.

Dès lors qu'il est formé, l'ensemble monobloc comportant la flasque (32), la pompe à vis excentrée (6) et la deuxième zone de malaxage (7), est facilement arrimé à la première zone de malaxage (3) grâce à un moyen de fixation du type semi-baïonnette.As soon as it is formed, the monobloc assembly comprising the flange (32), the eccentric screw pump (6) and the second mixing zone (7), is easily secured to the first mixing zone (3) thanks to a fixing means of the semi-bayonet type.

Présenté axialement face à l'orifice de sortie (40) de la dite zone de malaxage (3), l'ergot bas (35) de la flasque (32) est engagé dans la fente d'assemblage (41), ou arrimage statique, solidaire de la zone de malaxage (3) par un léger mouvement de rotation. Puis l'ergot haut (34) de la flasque (32) est saisi par l'attache excentrique rapide (42), ou arrimage dynamique, se trouvant sur la partie supérieure de l'enveloppe de ladite zone (3). Par action mécanique sur l'attache excentrique rapide, la flasque (32) vient se plaquer d'une manière étanche contre l'orifice de sortie (40) de la zone, l'arbre (19) de la pompe (6) s'enclenchant automatiquement dans l'arbre de l'organe de malaxage (5) de la zone (3) par un assemblage articulé à montage rapide bien connu (non représenté).Presented axially opposite the outlet orifice (40) of said mixing zone (3), the bottom lug (35) of the flange (32) is engaged in the assembly slot (41), or static lashing , secured to the mixing zone (3) by a slight rotational movement. Then the high lug (34) of the flange (32) is gripped by the quick eccentric attachment (42), or dynamic lashing, located on the upper part of the envelope of said zone (3). By mechanical action on the quick eccentric attachment, the flange (32) presses tightly against the outlet orifice (40) of the zone, the shaft (19) of the pump (6) s' automatically engaging in the shaft of the kneading member (5) of the zone (3) by a well known quick assembly articulated assembly (not shown).

Ainsi, grâce à ce moyen de fixation du type semi-baïonnette, le montage et le démontage de l'ensemble monobloc est rendu extrêmement simple et rapide, ainsi que l'accès à la zone de malaxage (3) et à son organe de malaxage (5).Thus, thanks to this fixing means of the semi-bayonet type, the assembly and disassembly of the monobloc assembly is made extremely simple and rapid, as well as access to the mixing zone (3) and to its mixing member. (5).

De même, les éléments constitutifs de l'ensemble monobloc, c'est à dire la pompe à vis excentrée (6), la deuxième zone de malaxage (7) peuvent être rapidement désolidarisés, rendant leur accès rapide et facile par une procédure inverse de celle décrite en pratiquant le désarrimage dudit ensemble par le relâchement de l'attache excentrique rapide (42) et un mouvement de rotation pour désengager l'ergot bas (35) de la fente d'assemblage (41).
Au delà de cette manoeuvre de désarrimage, la flasque (32) est libérée de sa position au contact de l'orifice d'entrée de la pompe (6) par le démontage des tiges de serrages (38 et 39).Likewise, the constituent elements of the monobloc assembly, that is to say the eccentric screw pump (6), the second mixing zone (7) can be quickly separated, making their access quick and easy by a reverse procedure of that described by practicing the undocking of said assembly by loosening the quick eccentric fastener (42) and a rotational movement to disengage the bottom lug (35) from the assembly slot (41).
Beyond this de-lashing maneuver, the flange (32) is released from its position in contact with the inlet orifice of the pump (6) by dismantling the clamping rods (38 and 39).

La figure 3 montre, selon une vue en perspective un moyen de montage et démontage instantané du type baïonnette de l'ensemble constitué par la pompe (6) et la deuxième zone de malaxage (7) sur l'orifice aval de la première zone de malaxage (3) par l'intermédiaire de fentes d'assemblage solidaires de la première zone de malaxage et d'oreilles solidaires dudit ensemble.FIG. 3 shows, in a perspective view, a means of instantaneous mounting and dismounting of the bayonet type of the assembly constituted by the pump (6) and the second mixing zone (7) on the downstream orifice of the first mixing (3) by means of assembly slots secured to the first mixing zone and ears secured to said assembly.

L'ensemble précité qui comporte la pompe à vis excentrée (6) et la deuxième zone de malaxage (7) est rendu monobloc par la présence d'une flasque (43), dotée d'un orifice (44) de diamètre identique ou équivalent aux diamètres des orifices de sortie (40) de la première zone de malaxage (3) et d'entrée (25) de la pompe à vis excentrée (6) (non représenté).The aforementioned assembly which comprises the eccentric screw pump (6) and the second mixing zone (7) is made in one piece by the presence of a flange (43), provided with an orifice (44) of identical or equivalent diameter to the diameters of the outlet orifices (40) of the first mixing zone (3) and of the inlet (25) of the eccentric screw pump (6) (not shown).

De la même manière que dans la figure 2, la flasque (43) est coaxialement placée en contact étanche avec l'orifice d'entrée de la pompe (6) puis elle est arrimée à l'ensemble formé de la pompe (6) et de la deuxième zone de malaxage (7) (non représentées) par l'intermédiaire des tiges de serrage (38 et 39) solidaires de la deuxième zone de malaxage (7), et dotées d'un moyen de serrage rapide.In the same way as in FIG. 2, the flange (43) is coaxially placed in sealed contact with the inlet port of the pump (6) then it is secured to the assembly formed by the pump (6) and of the second mixing zone (7) (not shown) by means of the clamping rods (38 and 39) integral with the second mixing zone (7), and provided with a rapid clamping means.

Ainsi l'ensemble monobloc comportant la flasque (43), la pompe (6) et la deuxième zone de malaxage (7) est facilement arrimé à la première zone de malaxage (3) par l'intermédiaire du moyen de fixation du type baïonnette.Thus the one-piece assembly comprising the flange (43), the pump (6) and the second mixing zone (7) is easily secured to the first mixing zone (3) by means of fixing means of the bayonet type.

L'ensemble monobloc est dès lors présenté axialement face à l'orifice de sortie (40) de la zone de malaxage (3) et à son contact, d'une manière telle que par rotation, l'oreille (45) de la flasque (43) se trouve en dessous de la fente (47) solidaire de l'enveloppe de la zone de malaxage (3), et que l'oreille (46) de ladite flasque, se trouve au dessus de la fente (48) également solidaire de ladite enveloppe. Par un léger mouvement de rotation, les oreilles (45 et 46) sont engagées dans les fentes (47 et 48). La flasque (43) est alors plaquée d'une manière étanche contre l'orifice de sortie (40) de la zone (3), l'arbre (19) de la pompe (6) (non représentée) s'enclenchant automatiquement dans l'arbre de l'organe de malaxage (5) de ladite zone (3) par un assemblage articulé à montage rapide bien connu (non représenté).The monobloc assembly is therefore presented axially opposite the outlet orifice (40) of the mixing zone (3) and in contact with it, in such a way that by rotation, the lug (45) of the flange (43) is located below the slot (47) integral with the envelope of the mixing zone (3), and that the lug (46) of said flange, is located above the slot (48) also secured to said envelope. By a slight rotational movement, the ears (45 and 46) are engaged in the slots (47 and 48). The flange (43) is then tightly pressed against the orifice of outlet (40) from zone (3), the shaft (19) of the pump (6) (not shown) automatically engaging in the shaft of the kneading member (5) of said zone (3) by a well known quick assembly articulated assembly (not shown).

Dès lors que l'ensemble monobloc précité (flasque (43), pompe (6) et zone de malaxage (7) est arrimé à la première zone de malaxage (3) par l'intermédiaire du moyen de fixation de type baïonnette, un système de sécurité formé du verrou (49) est mis en place par rotation selon la flèche (50). Ledit verrou (49) s'enclenche dans le moyen de blocage (51) qui est préalablement soulevé selon la flèche (52), avant d'être abaissé sur ledit verrou une fois placé.As soon as the aforementioned monobloc assembly (flange (43), pump (6) and mixing zone (7) is secured to the first mixing zone (3) by means of the bayonet type fixing means, a system security formed by the lock (49) is set in rotation according to the arrow (50). Said lock (49) engages in the locking means (51) which is previously lifted according to the arrow (52), before d 'be lowered on said lock once placed.

Ainsi, grâce à ce moyen de fixation du type baïonnette, le montage et le démontage de l'ensemble monobloc précité est rendu extrêmement simple et rapide, de même que l'accès à la zone de malaxage (3) et à son organe de malaxage (5).Thus, thanks to this bayonet type fixing means, the assembly and disassembly of the aforementioned monobloc assembly is made extremely simple and rapid, as is access to the mixing zone (3) and to its mixing member. (5).

Claims (24)

1 - Procédé de préparation de transfert et d'application en continu d'une suspension minérale aqueuse homogène, fluide,et faiblement aérée, contenant des matériaux minéraux pulvérulents, au moins un liant hydraulique et éventuellement d'autres constituants connus, destinée au domaine du bâtiment et des travaux publics, selon lequel les matières sèches constitutives et l'eau sont introduites séparément dans une zone de malaxage, puis la suspension formée est véhiculée à travers des zones d'envoi, de transfert et d'application, se composant des étapes successives suivantes : a) la formation d'une suspension dans une zone de malaxage dans laquelle sont introduits en quantités réglées, les matériaux minéraux pulvérulents constitutifs et l'eau nécessaire à la réalisation, b) la mise sous pression de la suspension minérale aqueuse fluide dans une zone appropriée à son envoi par passage dans une pompe à vis excentrée, c) l'envoi de la suspension par l'intermédiaire de la zone de transfert, caractérisé en ce que, selon une combinaison nouvelle, la suspension provenant de l'étape b) de la mise sous pression, est soumise à une action d'affinage par cisaillement dans une deuxième étape de malaxage avant son introduction dans l'étape c) de transfert. 1 - Process for the preparation of transfer and continuous application of a homogeneous, fluid, weakly aerated aqueous mineral suspension containing powdery mineral materials, at least one hydraulic binder and possibly other known constituents, intended for the field of building and public works, according to which the constituent dry materials and water are introduced separately into a mixing zone, then the suspension formed is conveyed through sending, transfer and application zones, consisting of stages following successive: a) the formation of a suspension in a kneading zone into which are introduced in regulated quantities, the constituent powdery mineral materials and the water necessary for the production, b) pressurizing the fluid aqueous mineral suspension in an area suitable for sending it by passage through an eccentric screw pump, c) sending the suspension through the transfer area, characterized in that, according to a new combination, the suspension originating from stage b) of the pressurization, is subjected to a refining action by shearing in a second mixing stage before its introduction into stage c) transfer. 2 - Dispositif de préparation, de transfert et d'application en continu d'une suspension minérale aqueuse fluide, homogène et faiblement aérée, selon la revendication 1, formée à partir du mélange de matériaux minéraux pulvérulents, d'au moins un liant hydraulique et éventuellement d'autres constituants connus, destinée au domaine du bâtiment et des travaux publics, comportant successivement : a) une trémie (1) pour le stockage des matières sèches constitutives de ladite suspension, fonctionnant par gravité ; b) au dessous de la trémie, une zone de malaxage (3) pour la préparation en continu de la suspension minérale aqueuse, munie d'un organe de malaxage (5), alimentée par gravité en matières sèches selon des quantités adéquates et en eau, par injection selon des quantités contrôlées ; c) à la sortie de la zone de malaxage, une pompe à vis excentrée (6), organe d'envoi sous pression de la suspension préparée ; d) un arbre unique (19) d'entraînement en rotation de l'organe de malaxage (5) de la zone de préparation de la suspension, de la pompe à vis excentrée (6) par l'intermédiaire d'un ensemble moteur-réducteur (11 et 12), cet arbre étant incliné par rapport à un plan horizontal, e) des organes (10) de transfert et d'applications de la suspension sur le site d'utilisation, caractérisé en ce que, entre la pompe à vis excentrée (6) c) et les organes (10) de transfert et d'application (e), est placée une deuxième zone de malaxage (7) comportant un organe (8) de cisaillement mis en mouvement par l'arbre unique (19) de rotation d) dans laquelle la suspension sous pression est soumise à un affinage et une homogénéisation. 2 - Device for the preparation, transfer and continuous application of a fluid, homogeneous and weakly aerated aqueous mineral suspension, according to claim 1, formed from the mixture of mineral materials pulverulent, of at least one hydraulic binder and possibly of other known constituents, intended for the building and public works sector, comprising successively: a) a hopper (1) for the storage of the dry materials constituting said suspension, operating by gravity; b) below the hopper, a kneading zone (3) for the continuous preparation of the aqueous mineral suspension, provided with a kneading member (5), fed by gravity with dry matter in adequate quantities and with water , by injection in controlled quantities; c) at the outlet of the mixing zone, an eccentric screw pump (6), a member for sending under pressure the prepared suspension; d) a single shaft (19) for driving in rotation the kneading member (5) of the suspension preparation zone, of the eccentric screw pump (6) by means of a motor assembly- reducer (11 and 12), this shaft being inclined relative to a horizontal plane, e) organs (10) for transferring and applying the suspension to the site of use, characterized in that, between the eccentric screw pump (6) c) and the transfer and application members (10), is placed a second mixing zone (7) comprising a shearing member (8) set in motion by the single rotating shaft (19) d) in which the pressure suspension is subjected to refining and homogenization. 3 - Dispositif selon la revendication 2 caractérisé en ce que la trémie (1) est dotée d'un organe de réglage (2) des quantités de matières sèches constitutives de la suspension. 3 - Device according to claim 2 characterized in that the hopper (1) is provided with an adjusting member (2) of the quantities of dry matter constituting the suspension. 4 - Dispositif selon l'une quelconque des revendications 2 ou 3 caractérisé en ce que la trémie (1) est dotée d'un moyen de vibration et/ou d'agitation. 4 - Device according to any one of claims 2 or 3 characterized in that the hopper (1) is provided with a means of vibration and / or agitation. 5 - Dispositif selon l'une quelconque des revendications 2 à 4 caractérisé en ce que la trémie (1) est dotée d'une grille (13) éventuellement soumise à vibration. 5 - Device according to any one of claims 2 to 4 characterized in that the hopper (1) is provided with a grid (13) possibly subjected to vibration. 6.- Dispositif selon l'une quelconque des revendications 2 à 5 caractérisé en ce que la trémie (1) débouche directement dans la zone de malaxage (3) inclinée par rapport au plan horizontal. 6.- Device according to any one of claims 2 to 5 characterized in that the hopper (1) opens directly into the mixing zone (3) inclined relative to the horizontal plane. 7 - Dispositif selon l'une quelconque des revendications 2 à 6 caractérisé en ce que les moyens d'alimentation en eau (4) de la zone de malaxage (3) comportent des instruments de mesure et des organes de réglage du débit d'eau. 7 - Device according to any one of claims 2 to 6 characterized in that the water supply means (4) of the mixing zone (3) comprise measuring instruments and organs for adjusting the water flow . 8 - Dispositif selon l'une quelconque des revendications 2 à 7 caractérisé en ce que l'organe de malaxage (5), balaie l'orifice de sortie de la trémie (1). 8 - Device according to any one of claims 2 to 7 characterized in that the kneading member (5), sweeps the outlet opening of the hopper (1). 9 - Dispositif selon l'une quelconque des revendications 2 à 8 caractérisé en ce que l'organe de malaxage (5) est choisi dans le groupe constitué par les agitateurs à cadre, à ancre dont les éléments constitutifs sont façonnés pour brasser la suspension en cours de formation, dégager les parois de l'enveloppe cylindrique de la zone de malaxage et conduire la suspension formée vers l'aval de ladite zone. 9 - Device according to any one of claims 2 to 8 characterized in that the kneading member (5) is chosen from the group consisting of frame agitators, anchor whose constituent elements are shaped to stir the suspension in during training, clear the walls of the cylindrical envelope from the mixing zone and conduct the suspension formed downstream of said zone. 10- Dispositif selon l'une quelconque des revendications 2 à 9 caractérisé en ce que la première zone de malaxage, en amont de l'orifice d'entrée des matières pulvérulentes, est dotée d'un organe anti-retour pour lesdites matières et d'un ensemble de joints, montés sur l'arbre d'entrainement de l'organe de malaxage. 10- Device according to any one of claims 2 to 9 characterized in that the first mixing zone, upstream of the inlet port of the pulverulent materials, is provided with a non-return member for said materials and d '' a set of seals, mounted on the drive shaft of the kneading member. 11- Dispositif selon l'une quelconque des revendications 2 à 10 caractérisé en ce que la deuxième zone de malaxage est dotée d'un organe de cisaillement. 11- Device according to any one of claims 2 to 10 characterized in that the second mixing zone is provided with a shearing member. 12- Dispositif selon la revendication 11 caractérisé en ce que l'organe de cisaillement est une chaîne à maillons dont l'une des extrémités est assujettie à l'arbre d'entraînement, l'autre étant libre. 12- Device according to claim 11 characterized in that the shearing member is a link chain, one end is subject to the drive shaft, the other being free. 13- Dispositif selon la revendication 11 caractérisé en ce que l'organe de cisaillement est choisi dans le groupe constitué par les turbines rotatives à sabres, à pales, à hélices comportant une ou plusieurs branches implantées selon un ou plusieurs étages, la ou les branches de chaque étage étant éventuellement décalées angulairement par rapport aux branches des autres étages. 13- Device according to claim 11 characterized in that the shearing member is selected from the group consisting of rotary turbines with sabers, blades, propellers comprising one or more branches located in one or more stages, the branch or branches of each stage possibly being angularly offset with respect to the branches of the other stages. 14- Dispositif selon la revendication 13 caractérisé en ce que la ou les branches de chaque étage de la turbine est ou sont reliées à l'une au moins des branches des autres étages par des éléments mécaniques de liaison. 14- Device according to claim 13 characterized in that the branch or branches of each stage of the turbine is or are connected to at least one of the branches of the other stages by mechanical connecting elements. 15- Dispositif selon l'une quelconque des revendications 13 et 14 caractérisé en ce que les turbines rotatives sont associées à des chicanes fixes montées sur la périphérie interne de l'enveloppe. 15- Device according to any one of claims 13 and 14 characterized in that the rotary turbines are associated with fixed baffles mounted on the inner periphery of the envelope. 16- Dispositif selon l'une quelconque des revendications 2 à 15 caractérisé en ce que la deuxième zone de malaxage est dotée d'un organe de filtration. 16- Device according to any one of claims 2 to 15 characterized in that the second mixing zone is provided with a filtration member. 17- Dispositif selon l'une quelconque des revendications 2 à 16 caractérisé en ce que l'organe de malaxage de la première zone de malaxage, la pompe à vis excentrée et l'organe de cisaillement de la deuxième zone de malaxage sont liés les uns aux autres par des assemblages articulés à montage rapide bien connus, en formant un arbre unique d'entraînement accouplé à un groupe moto-réducteur, en tête de la première zone de malaxage. 17- Device according to any one of claims 2 to 16 characterized in that the kneading member of the first kneading zone, the eccentric screw pump and the shearing member of the second kneading zone are linked to each other to the others by well-known quick-assembly articulated assemblies, by forming a single drive shaft coupled to a geared motor group, at the head of the first mixing zone. 18- Dispositif selon la revendication 17 caractérisé en ce que l'arbre d'entrainement est incliné par rapport au plan horizontal selon un angle choisi dans l'intervalle 20 à 35 degrés. 18- Device according to claim 17 characterized in that the drive shaft is inclined relative to the horizontal plane at an angle chosen in the interval 20 to 35 degrees. 19- Dispositif selon l'une quelconque des revendications 2 à 18 aracctérisé en ce que le groupe moto-réducteur est monté sur un axe horizontal de rotation lui permettant de basculer vers le bas tout en se désaccouplant de l'axe de l'organe de malaxage et en donnant accès à ladite zone. 19- Device according to any one of claims 2 to 18 aracctérisé in that the gear motor group is mounted on a horizontal axis of rotation allowing it to tilt down while uncoupling from the axis of the organ of mixing and giving access to said area. 20- Dispositif selon l'une quelconque des revendications 2 à 19 caractérisé en ce que l'ensemble constitué par la pompe à vis excentrée et la deuxième zone de malaxage est rendu monobloc par une flasque coaxialement évidée prenant appui sur l'orifice d'entrée de la pompe et arrimée à la deuxième zone de malaxage par des moyens appropriés d'assemblage. 20- Device according to any one of claims 2 to 19 characterized in that the assembly constituted by the eccentric screw pump and the second mixing zone is made in one piece by a coaxially hollowed flange bearing on the inlet orifice of the pump and secured to the second mixing zone by suitable assembly means. 21- Dispositif selon la revendication 20 caractérisé en ce que l'ensemble monobloc est rendu solidairement étanche de l'extrémité avale de la première zone de malaxage par un moyen de montage-démontage rapide du type semi-baïonnette comportant un moyen d'arrimage statique et un moyen d'arrimage dynamique. 21- Device according to claim 20 characterized in that the one-piece assembly is made integrally sealed from the downstream end of the first mixing zone by a rapid assembly-disassembly means of the semi-bayonet type comprising a static securing means and a dynamic lashing means. 22- Dispositif selon la revendication 21 caractérisé en ce que le moyen d'image statique est formé d'un ergot s'engageant dans une fente d'assemblage et le moyen d'image dynamique est formé par une attache excentrique rapide (32). 22- Device according to claim 21 characterized in that the static image means is formed by a lug engaging in an assembly slot and the dynamic image means is formed by a quick eccentric attachment (32). 23- Dispositif selon la revendication 20 caractérisé en ce que l'ensemble monobloc est rendu solidairement étanche de l'extrémité avale de la première zone de malaxage par un moyen de montage-démontage rapide du type baïonnette. 23- Device according to claim 20 characterized in that the one-piece assembly is made integrally sealed from the downstream end of the first mixing zone by a rapid assembly-disassembly means of the bayonet type. 24- Application du procédé et du dispositif selon les revendications 1 à 23 à la préparation, transfert et application en continu de suspension minérale aqueuse homogène, fluide et faiblement aérée, dans le domaine du bâtiment et des travaux publics, et notamment pour le ragréage de surfaces. 24- Application of the method and the device according to claims 1 to 23 to the preparation, transfer and continuous application of homogeneous aqueous mineral suspension, fluid and slightly aerated, in the field of building and public works, and in particular for the patching of surfaces.
EP92420025A 1991-01-22 1992-01-22 Method and device for preparing, transferring and applying continuously a fluid aqueous mineral cleaning down suspension Expired - Lifetime EP0496685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9100895A FR2671754B1 (en) 1991-01-22 1991-01-22 PROCESS AND DEVICE FOR THE CONTINUOUS PREPARATION, TRANSFER AND APPLICATION OF AN AQUEOUS MINERAL SUSPENSION FLUID OF SCRAPING.
FR9100895 1991-01-22

Publications (2)

Publication Number Publication Date
EP0496685A1 true EP0496685A1 (en) 1992-07-29
EP0496685B1 EP0496685B1 (en) 1996-01-10

Family

ID=9409083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92420025A Expired - Lifetime EP0496685B1 (en) 1991-01-22 1992-01-22 Method and device for preparing, transferring and applying continuously a fluid aqueous mineral cleaning down suspension

Country Status (5)

Country Link
EP (1) EP0496685B1 (en)
AT (1) ATE132795T1 (en)
DE (1) DE69207440T2 (en)
ES (1) ES2082416T3 (en)
FR (1) FR2671754B1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0584573A1 (en) * 1992-08-27 1994-03-02 BUG BETRIEBSANLAGEN UND GRUNDBESITZ GmbH Device for making pumpable mortar on the building site
EP0594991A1 (en) * 1993-09-08 1994-05-04 PFT Putz- und Fördertechnik GmbH &amp; Co. KG Device for mixing and pumping a mortar.
EP1036639A2 (en) * 1999-03-15 2000-09-20 INOTEC GmbH Transport- und Fördersysteme Method aud device for preparing a sprayable mortar to be used in a wet spraying process
NL1020988C2 (en) * 2002-07-03 2004-01-06 Stukbouw B V Screw conveyor, especially for plaster spraying machine, has conveyor holder and outlet conduit movable relative to each other
EP1721717A1 (en) * 2005-05-13 2006-11-15 Knauf PFT GmbH &amp; Co. KG Device and method for making a flowable mass
DE102006049171A1 (en) * 2006-10-18 2008-04-30 Werner Dutschmann Device for mixing dry mortar with water comprises a mixing container and a cylindrical mixing chamber with flanges having a concentric inlet opening on one side and a concentric outlet opening having a concentric recess on the other side
ITVI20100254A1 (en) * 2010-09-20 2012-03-21 Revelin Evaristo & Figli Snc TURBOMESCOLATORE PERFECTED FOR PLASTERING MACHINES AND USING PLASTERING MACHINE, DETAILED TURBOMESCOLATORE
CN109483736A (en) * 2019-01-28 2019-03-19 许昌德通振动搅拌技术有限公司 A vibrating device for mixer
CN110713025A (en) * 2019-09-17 2020-01-21 铜陵有色金属集团铜冠矿山建设股份有限公司 Rapid installation method of chute suspension type vibration ore drawing machine hopper frame
CN113001759A (en) * 2021-03-12 2021-06-22 广州中创建筑科技有限公司 Concrete stirring device and method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014005405A1 (en) * 2014-04-14 2015-10-15 Sto Se & Co. Kgaa Device for applying difficult-to-dry dry building materials
FR3035802B1 (en) 2015-05-05 2020-01-31 Patrick Perdreau APPARATUS FOR APPLYING A LIQUID SCRAPING PRODUCT
DK4086056T3 (en) 2017-08-09 2024-06-17 Sika Tech Ag METHOD FOR PRODUCING A STRUCTURE FROM A BUILDING MATERIAL
BR112020000144A2 (en) 2017-08-09 2020-07-14 Sika Technology Ag device for applying a building material

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2340246A1 (en) * 1973-08-09 1974-09-19 Karl Dipl-Ing Schlecht CONTINUOUS MIXING PUMP
GB1599856A (en) * 1978-02-24 1981-10-07 Mathis Fertigputz Mixing apparatus
DE3013280A1 (en) * 1980-04-05 1981-10-22 Mathis System-Technik Gmbh, 7801 Merdingen Mixed mortar continuous supply machine - has shaft in three detachable sections for feed metering and mixing augers
DE3546501A1 (en) * 1985-09-13 1987-04-23 Heidelberger Zement Ag Device for the continuous supply of hydraulically setting composition
AT385309B (en) * 1986-06-13 1988-03-25 Gd Anker Gmbh & Co Kg Arrangement for the high-pressure delivery of building materials
CH667036A5 (en) * 1985-03-26 1988-09-15 Rieser & Lepri Ag Mortar or plaster mixing machine - is driven by electric motor and mounted on wheelbarrow
FR2616169A1 (en) * 1987-06-03 1988-12-09 Boehm Patrick Method for transporting and applying moist granular materials of low density which do not flow naturally and device for the implementation of this method
EP0300342A2 (en) * 1987-07-24 1989-01-25 P.F.T. Putz- und Fördertechnik GmbH Device for continuously mixing mortar with water and for transporting this mixture by pumping

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2340246A1 (en) * 1973-08-09 1974-09-19 Karl Dipl-Ing Schlecht CONTINUOUS MIXING PUMP
GB1599856A (en) * 1978-02-24 1981-10-07 Mathis Fertigputz Mixing apparatus
DE3013280A1 (en) * 1980-04-05 1981-10-22 Mathis System-Technik Gmbh, 7801 Merdingen Mixed mortar continuous supply machine - has shaft in three detachable sections for feed metering and mixing augers
CH667036A5 (en) * 1985-03-26 1988-09-15 Rieser & Lepri Ag Mortar or plaster mixing machine - is driven by electric motor and mounted on wheelbarrow
DE3546501A1 (en) * 1985-09-13 1987-04-23 Heidelberger Zement Ag Device for the continuous supply of hydraulically setting composition
AT385309B (en) * 1986-06-13 1988-03-25 Gd Anker Gmbh & Co Kg Arrangement for the high-pressure delivery of building materials
FR2616169A1 (en) * 1987-06-03 1988-12-09 Boehm Patrick Method for transporting and applying moist granular materials of low density which do not flow naturally and device for the implementation of this method
EP0300342A2 (en) * 1987-07-24 1989-01-25 P.F.T. Putz- und Fördertechnik GmbH Device for continuously mixing mortar with water and for transporting this mixture by pumping

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0584573A1 (en) * 1992-08-27 1994-03-02 BUG BETRIEBSANLAGEN UND GRUNDBESITZ GmbH Device for making pumpable mortar on the building site
EP0594991A1 (en) * 1993-09-08 1994-05-04 PFT Putz- und Fördertechnik GmbH &amp; Co. KG Device for mixing and pumping a mortar.
DE19911368B4 (en) * 1999-03-15 2012-10-04 INOTEC GmbH Transport- und Fördersysteme Apparatus for producing sprayed mortar for use in wet spraying
EP1036639A3 (en) * 1999-03-15 2002-07-10 INOTEC GmbH Transport- und Fördersysteme Method aud device for preparing a sprayable mortar to be used in a wet spraying process
EP1036639A2 (en) * 1999-03-15 2000-09-20 INOTEC GmbH Transport- und Fördersysteme Method aud device for preparing a sprayable mortar to be used in a wet spraying process
NL1020988C2 (en) * 2002-07-03 2004-01-06 Stukbouw B V Screw conveyor, especially for plaster spraying machine, has conveyor holder and outlet conduit movable relative to each other
EP1721717A1 (en) * 2005-05-13 2006-11-15 Knauf PFT GmbH &amp; Co. KG Device and method for making a flowable mass
DE102006049171A1 (en) * 2006-10-18 2008-04-30 Werner Dutschmann Device for mixing dry mortar with water comprises a mixing container and a cylindrical mixing chamber with flanges having a concentric inlet opening on one side and a concentric outlet opening having a concentric recess on the other side
DE102006049171B4 (en) * 2006-10-18 2009-01-15 Werner Dutschmann Device for continuous and intensive mixing of dry mortar
ITVI20100254A1 (en) * 2010-09-20 2012-03-21 Revelin Evaristo & Figli Snc TURBOMESCOLATORE PERFECTED FOR PLASTERING MACHINES AND USING PLASTERING MACHINE, DETAILED TURBOMESCOLATORE
CN109483736A (en) * 2019-01-28 2019-03-19 许昌德通振动搅拌技术有限公司 A vibrating device for mixer
CN110713025A (en) * 2019-09-17 2020-01-21 铜陵有色金属集团铜冠矿山建设股份有限公司 Rapid installation method of chute suspension type vibration ore drawing machine hopper frame
CN110713025B (en) * 2019-09-17 2021-03-30 铜陵有色金属集团铜冠矿山建设股份有限公司 Rapid installation method of chute suspension type vibration ore drawing machine hopper frame
CN113001759A (en) * 2021-03-12 2021-06-22 广州中创建筑科技有限公司 Concrete stirring device and method

Also Published As

Publication number Publication date
EP0496685B1 (en) 1996-01-10
FR2671754A1 (en) 1992-07-24
ATE132795T1 (en) 1996-01-15
ES2082416T3 (en) 1996-03-16
DE69207440T2 (en) 1996-08-29
FR2671754B1 (en) 1997-07-25
DE69207440D1 (en) 1996-02-22

Similar Documents

Publication Publication Date Title
EP0496685B1 (en) Method and device for preparing, transferring and applying continuously a fluid aqueous mineral cleaning down suspension
CA1128035A (en) Apparatus for maintaining solids in suspension, and related method of use
FR2576221A1 (en) PROCESS AND DEVICE FOR CONTINUOUSLY MIXING AND MIXING POWDERY PRODUCTS, SUCH AS COAL OR SPRAYED PETROLEUM COKE FOR PREPARING SLURRY
KR102034852B1 (en) Eccentric type dissolver
FR2922123A1 (en) INSTALLATION FOR FLOCCULATION OF SUSPENDED MATERIAL SLUDGE, METHOD USING THE INSTALLATION
FR2500785A1 (en) METHOD AND APPARATUS FOR APPLYING MORTAR OR CONCRETE
EP0241357B1 (en) Process for the anaerobic differential cobiodegradation of a cellulosic substrate and of a substrate suitable for the fermentation, and apparatus for carrying out this process
EP3894060B1 (en) Device for injecting fluid into a liquid, method for cleaning said device, and effluent treatment installation
WO1995001830A1 (en) Device and method for mixing a hydraulic binder and mineral materials with a liquid and use of same
FR2560065A1 (en) METHOD AND DEVICE FOR MIXING BUD LIQUIDS
EP3409340B1 (en) Installation and method for filtering a liquid/solid mixture
WO1986001767A1 (en) New techniques and machine for producing, projecting and transferring glass fibre-based concretes and the like
CN217795710U (en) Suspension making equipment
CN221441158U (en) Paper pulp crushing equipment for paper product processing
CN220531298U (en) Stirring and mixing device for sludge recovery
BE1003844A3 (en) Method and device for the exchange fluids by mass media exchange.
CN210434366U (en) Oil field is with stifled water seal scurring agent fluid distribution system and fluid distribution agitator tank
CN210434404U (en) Skid-mounted liquid distribution system and rotary mixer
FR3120234A1 (en) Device for biogas production tank or pre-pit with multifunction pump
CH648773A5 (en) Method for the treatment of industry waste and installation for its implementation
BE340176A (en)
FR2570618A1 (en) Device for homogenising fluid products which naturally have a tendency to demix and applications especially to methanisation
CA2910290C (en) Process and composition for converting liquid hydrocarbons and fatty substances to solid form, devices for implementing this process and manufacturing this composition, and the us e thereof for environmental remediation
CN116785964A (en) Mixing arrangement is used in processing of iron ore tailing convenient to clearance
WO2009004148A2 (en) Mixer type device for continuously mixing gypsum and increasing the production capacity while reducing gypsum plate manufacturing costs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE

17P Request for examination filed

Effective date: 19921126

17Q First examination report despatched

Effective date: 19931207

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19960110

Ref country code: DK

Effective date: 19960110

Ref country code: AT

Effective date: 19960110

REF Corresponds to:

Ref document number: 132795

Country of ref document: AT

Date of ref document: 19960115

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Effective date: 19960131

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19960131

Ref country code: BE

Effective date: 19960131

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19960111

REF Corresponds to:

Ref document number: 69207440

Country of ref document: DE

Date of ref document: 19960222

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: WILLIAM BLANC & CIE CONSEILS EN PROPRIETE INDUSTRI

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2082416

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA SOCIETA' SEMPLICE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Effective date: 19960410

BERE Be: lapsed

Owner name: SERVABOEHM

Effective date: 19960131

Owner name: S.A. OMNIPLASTIC

Effective date: 19960131

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: OMNIPLASTIC COMPTOIR DES MATERIAUX NOUVEAUX DU BAT

REG Reference to a national code

Ref country code: FR

Ref legal event code: RM

Ref country code: FR

Ref legal event code: CJ

ITPR It: changes in ownership of a european patent

Owner name: CAMBIO NOME 1o TITOLARE;OMNIPLASTIC COMPTOIR DES M

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19971230

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19971231

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980105

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990801

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20051223

Year of fee payment: 15

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20070122

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070122

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20080111

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080123

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081231

Year of fee payment: 18

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20090123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090123

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100803

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090122

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20110131

Year of fee payment: 20