EP0462873B1 - Device for spreading a fluid substance and apparatus for simultaneously applying this substance and a road-covering material - Google Patents

Device for spreading a fluid substance and apparatus for simultaneously applying this substance and a road-covering material Download PDF

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Publication number
EP0462873B1
EP0462873B1 EP91401574A EP91401574A EP0462873B1 EP 0462873 B1 EP0462873 B1 EP 0462873B1 EP 91401574 A EP91401574 A EP 91401574A EP 91401574 A EP91401574 A EP 91401574A EP 0462873 B1 EP0462873 B1 EP 0462873B1
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EP
European Patent Office
Prior art keywords
chamber
spreading
emulsion
machine
road
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.)
Expired - Lifetime
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EP91401574A
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German (de)
French (fr)
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EP0462873A1 (en
Inventor
Michel Perrin
Jean-Pierre Reymonet
Clément Beatrix
Pierre Defontaine
Philippe Brissonneau
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Colas SA
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Colas SA
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
    • E01C19/17—Application by spraying or throwing
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/16—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials for applying or spreading liquid materials, e.g. bitumen slurries
    • E01C19/17—Application by spraying or throwing
    • E01C19/176—Spraying or throwing elements, e.g. nozzles; Arrangement thereof or supporting structures therefor, e.g. spray-bars

Definitions

  • the present invention relates to a device for spreading an emulsion for attaching bituminous mixes on the surface of a road, as well as to a paver construction machine of the finisher type comprising such a device.
  • this device does not in any way prevent the tracks of the paver from rolling in the bonding layer, and this precisely in the parts of said bonding layer which are subsequently the most stressed.
  • the spreading booms with multiple orifices used on conventional binder spreaders prove, in practice, totally unsuitable for this new device: the spreading on the ground of the usual quantities of binder - quantities which are relatively low (300 g per m2 to 1.2 kg per m2) - is achieved by moving the spreading ramp at the speed of the paver, that is to say at a much slower speed (3m / min at 6 m / min) than that of conventional spreaders (30 m / min to 100 m / min); this assembly must generate a low binder flow rate, therefore the orifices of the conventional spreading nozzles are no longer suitable and must have a very small diameter, they tend to become clogged due to the viscosity of the binders used.
  • Document GB-A-1,041,511 teaches a spraying device intended to spread tar or bitumen.
  • This device comprises a spreading ramp provided with projection nozzles, as well as two protective skirts mounted on either side and along the spreading ramp.
  • This device is fitted with a conventional spray system designed so as to be able to accelerate the tar or bitumen, very viscous substances even at more than 100 ° C, through the nozzle orifice to form a liquid film which, possibly, under the effect of the friction of the air, becomes droplets of a size a few millimeters.
  • the spreading of the substance is done by gravity or by the inertia of the droplets which all have an initial speed at the outlet of the nozzle.
  • the present invention therefore aims to overcome these various drawbacks and to provide a spreading ramp device overcoming jets with orifice of very small diameter incompatible with the viscosity of the binders commonly used. It notably proposes a spreading device in which the nozzles are replaced by a chamber containing inside its nebulized emulsion, said chamber being provided facing the road with a large opening, allowing the deposition of said nebulized emulsion on said road.
  • the device proposed by the invention also has the advantage of being compact enough to be able to be placed at the rear of the finisher, behind the tracks thereof, between said tracks and the means of spreading of asphalt mixes on the road.
  • the present invention therefore relates to a device for spreading an emulsion for attaching bituminous mixes on the surface of a road, comprising, on a mobile machine at least one ramp spreading along which the spreading is at least partially carried out, said ramp being associated with an emulsion supply circuit, and comprising at least one chamber comprising at least one opening on its part intended to be opposite the on the road, said chamber being associated with supply and nebulization means making it possible to supply said chamber internally with nebulized emulsion, characterized in that said chamber (19) is also associated with repulsion means, which are located on the interior coating of said chamber, intended to promote the deposition of the nebulized emulsion towards the road through said opening.
  • the repulsion means intended to promote the deposition of the emulsion on the road comprise, in an advantageous embodiment, a coating of the walls, which delimit said chamber, with a material having a low adhesion adhesion to the emulsion or substantially zero.
  • a material constituting said coating can be, for example, of the polytetrafluoroethylene type.
  • said chamber when the bonding emulsion is ionic or electrically charged, said chamber is electrically isolated from the mass of the mobile machine, the walls of said chamber being electrically charged with a polarity identical to that of the 'emulsion.
  • the walls of said chamber may be at least partially made of metallic material, in particular of a stainless metallic material.
  • the walls of the chamber can be positively charged, the emulsion being a cationic emulsion.
  • the chamber is preferably of adjustable length.
  • the chamber may in particular comprise a main part associated with means allowing a lateral extension of said main part.
  • the chamber may comprise a main part extending substantially over a width of the mobile machine and associated at each of its ends with lateral extension means.
  • a room is delimited, in whole or in part, by the walls of a box provided with an opening on its part facing the road.
  • the main part of the chamber is delimited by a central box which extends substantially over a width of the mobile machine and which is associated at each of its ends with a side box connected in leaktight manner by fitting to said central box.
  • the relative nesting length of the central box and a side box being adjustable.
  • the length of the chamber can, for example, be adjusted via hydraulic cylinders.
  • the supply and nebulization means comprise a pneumatic atomizer associated with an emulsion inlet and a pressurized gas inlet.
  • the pressurized gas can be compressed air.
  • the opening of the chamber is surrounded at least partially by flexible skirts extending, in the operating position of the ramp, from said opening to substantially the surface of the road.
  • the room can also be surrounded at least partially by one (or more) curtain (s) of forced air.
  • the chamber can be associated with a gas or hot air supply nozzle.
  • the ramp is preferably associated with means mounted on the mobile machine and allowing the placing in the operating position or the raising of said ramp by compared to the road.
  • Said means for placing in the operating position or for lifting can be hydraulic cylinders.
  • Another object of the invention is a paver construction machine of the finisher type comprising, on a chassis mounted on displacement means, means for spreading bituminous mixes and means for supplying said spreading means, characterized in that it comprises a device for spreading a bonding emulsion of said coated materials on the surface of a road of the type previously described.
  • the device for spreading a bonding emulsion is advantageously arranged at the rear of the chassis with respect to the direction of movement of the machine during the spreading of the mixes.
  • the device for spreading a bonding emulsion can be arranged between the means for moving said machine and the means for spreading bituminous mixes.
  • the device for spreading a bonding emulsion may, for example, be arranged under the part of the supply means which are located at the rear of the chassis, relative to the center of movement of the machine being spreading of asphalt.
  • the feeding means comprise a feeding belt allowing the materials to be conveyed from a zone towards the front part of the machine to a zone towards its rear part
  • said feeding belt can be raised substantially and / or inclined in its rear part just above the spreading means of a bonding emulsion.
  • the machine when the machine comprises a pilot cabin, it also comprises an emulsion tank mounted on the pilot cabin.
  • An interchangeable tank can be mounted on hydraulic cylinders with adjustable height.
  • such a machine may include an emulsion dosing group which includes a metering pump supplying the means of nebulization; it can include a set of controls allowing the enslavement of the flow and the stopping of the supply by linking to the movement and the speed of the machine, this spreading device can be able to be quickly dissociated from the chassis of the machine .
  • the machine can also include a thermally insulated emulsion tank.
  • a machine of the finisher type according to the invention is mounted on tracks 2 and essentially comprises a pilot cabin 3, a hopper 4 for receiving bituminous mixes, said hopper 4 being disposed at the front of the paver, conventional means 5 for spreading bituminous mixes which are constituted in particular by a distribution screw and which are arranged at the rear of finisher 1, a table 6 for smoothing deposited asphalt layers, as well as a device 7 for spreading a binder emulsion, associated with an emulsion supply circuit referenced by 8 in its together.
  • the hot bituminous mixes are transferred in a conventional manner from the hopper 4 to the means 5 for spreading the mixes via a transfer mat (not shown) placed on the finisher 1 between the cabin 3 and the part of said finisher 1 which carries the tracks 2.
  • This carpet is slightly raised in its rear part above the spreading means 7.
  • the smoothing table 6 is mounted at the rear of the finisher 1, beyond the asphalt spreading means 5, on two bent arms 9 extending on each side of the machine from substantially the middle part of the tracks to beyond the spreading means 5.
  • These two arms 9 are articulated at their end opposite to the smoothing table 6 on spacers 10, mounted, at the level of the tracks 2, the inclination of said arms 9 relative to the plane of the ground determining the height of the smoothing table 6 and being adjusted by means of jacks 11 s' each extending between a attachment point on the spacer 10 and an attachment point 12 on the side of the tractor frame in the extension of the floor of the cabin 3, at the rear of the latter.
  • the supply circuit 8 essentially comprises an emulsion reservoir 13, with a capacity greater than 2500 liters.
  • This reservoir 13 is disposed above the cabin 3 and extends substantially over the entire length thereof. It is mounted on four hydraulic lifting cylinders 14 extending perpendicular to the floor of the cabin 3 in the vicinity of each of the four ends thereof. These jacks 14 allow the height of the tank 13 to be adjusted at will on the finisher 1, said tank 13 admitting, for example, a high position of use and a low storage position facilitating the transport of the finisher 1.
  • This tank 13 is container-cartridge can be replaced during operation, if necessary, the walls of this tank 13 having orifices with valve intended to cooperate with the male ends of pipes 15 and 16, which are supply and return pipes connecting the reservoir 13 to a dosing group 17 of the binder emulsion providing flow and pressure.
  • the reservoir 13 is furthermore a thermally insulated reservoir which can be electrically heated.
  • the device 7 for spreading binder comprises a spreading ramp 18 which essentially consists of a chamber 19 containing inside its emulsion in nebulized form.
  • This chamber 19 is delimited by the walls of a main caisson 20 which is a U-shaped cross section caisson extending along substantially the entire width of the paver 1 and the open part of which faces the roadway C.
  • the chamber 19 is also also delimited laterally by the walls of two secondary boxes 21 and 22 which extend the main box 20 on each of its sides.
  • the two secondary boxes 21 and 22 therefore make it possible, if necessary, to extend said main box 20. They are each associated with a hydraulic cylinder 23 whose cylinder extends respectively over substantially half the width of the main box 20 and whose the movable rod 24 is connected to the secondary boxes 21 or 22 with which said jack is associated by means of a spacer 25 which is secured to them at their end furthest from the main box 20.
  • the box 20 is held on the finisher frame 1 by means of two jacks 26, the rods of which are articulated on the box 20 towards the two ends of the latter and which are mounted on each side of the finisher 1. These two jacks 26 serve as support and lifting cylinders for the spreading ramp 18 relative to the carriageway C.
  • the box 20 is intended to allow the spreading of the emulsion or binder, depending on the width of the finisher 1, the two boxes secondary 21 or 22 to create right and left extensions relative to said main box 20 and to carry out an emulsion spreading on the widths of the finisher 1. In all cases, the spreading is carried out perpendicular to the axis of movement of the machine.
  • Each of the lateral extreme walls of the secondary boxes 21 and 22 is provided with a pneumatic emulsion atomizer 27 to which is connected, on the one hand, an inlet 28 of compressed air and an inlet 29 serving for the supply of binder .
  • These two atomizers 27 create, in the whole of the chamber 19, when they are supplied, an atmosphere supersaturated with nebulized emulsion.
  • the main box 20 is also associated, towards its middle part, with a pipe 30 connected to a hot air circuit and intended for the stripping of the whole of the chamber 19, during the commissioning after stopping of the device d spreading.
  • the box 20 is surrounded externally at its opening by, on each of its sides in its length, a skirt 31 extending in the working position of the spreading ramp 18, from said opening to the floor C.
  • the walls of the boxes 21 and 22 are in turn surrounded internally at the opening of the chamber 19 by skirts 32 also extending from said opening to the floor C, in the working position of the spreading ramp 18.
  • the skirts 31 and 32 are completed by a low pressure air curtain 33 ensuring the elimination of any leaks and surrounding the opening of the chamber 19, the assembly making it possible to delimit in a sealed manner on the pavement C the deposit surface of the nebulized emulsion.
  • the entire device is further supplemented by a high and low pressure air distributor as well as a set of controls.
  • Chamber 19 is associated with means intended to promote the deposition of the nebulized emulsion through its opening on the pavement C. These repulsion means allow a homogeneous distribution of the emulsion nebulized on the pavement C, avoiding, for example, that the emulsion does not amalgamate by plates on the walls of the chamber 19, which plates detaching under the effect of their weight could be at the origin of irregularities on the deposited surface.
  • the aforementioned means can for example be constituted by means making it possible to positively charge the walls of the chamber 19, that is to say the walls of the box 20 and secondary boxes 21 and 22, the emulsion used being a cationic emulsion, boxes 20, 21 and 22 being metal boxes, for example made of stainless steel. Under the effect of electrical repulsion, the particles of the nebulized emulsion, repelled relative to the walls of the chamber, will be precipitated towards the ground, whose potential is grounded.
  • the walls of the box are coated internally with a material of the polytetrafluoroethylene type, whose adhesion to the nebulized emulsion is low or zero and which serves as a means of repulsion.
  • the supersaturation obtained in the box causes the emulsion to run off on the walls of the boxes 20, 21 and 22, then the skirts 31 and 32 ensure the smoothing and distribution of the emulsion on the pavement C.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
  • Coating Apparatus (AREA)
  • Road Signs Or Road Markings (AREA)
  • Nozzles (AREA)

Abstract

Device for spreading a fluid substance or the like, particularly a bonding emulsion for bituminous coated products over the surface of a road (C), comprising, on movable plant (1), at least one spreading boom (ramp) (18) along which spreading is at least partially carried out, the said boom (ramp) being associated with an emulsion-supply circuit, characterised in that a boom (ramp) comprises at least one chamber (19) comprising at least one opening on its part intended to face the road (C), the said chamber (19) being associated with means (27, 28, 29) for supply and spray-formation permitting the said chamber (19) to be supplied in its interior with emulsion in spray form, as well as means intended to enhance the deposition of the emulsion in spray form onto the road (C) via the said opening. <IMAGE>

Description

La présente invention est relative à un dispositif d'épandage d'une émulsion d'accrochage d'enrobés bitumineux sur la surface d'une route, ainsi qu'à une machine de construction de chaussée du type finisseur comportant un tel dispositif.The present invention relates to a device for spreading an emulsion for attaching bituminous mixes on the surface of a road, as well as to a paver construction machine of the finisher type comprising such a device.

On sait que le collage des différentes couches de matériaux composant une chaussée (grave ciment, grave bitume, enrobés bitumineux) est réalisé par épandage d'une émulsion d'accrochage avant application de la couche supérieure. Pendant longtemps, cette couche d'émulsion a été déposée avant le passage du finisseur destiné à la mise en place des enrobés bitumineux, par une machine comportant une citerne et une rampe d'épandage.We know that the bonding of the different layers of materials making up a pavement (severe cement, severe bitumen, bituminous mixes) is carried out by spreading a bonding emulsion before applying the upper layer. For a long time, this emulsion layer was deposited before the passage of the finisher intended for the installation of bituminous mixes, by a machine comprising a tank and a spreading ramp.

Cependant, il est apparu récemment, ainsi que cela a été exposé dans le document EP-A-292.337, que cette façon de procéder présentait de nombreux inconvénients :

  • les répandeuses routières, qui présentaient un encombrement important et une faible maniabilité, étaient peu adaptées à des chantiers urbains,
  • en outre, l'approvisionnement du finisseur en enrobés était réalisé par des camions, qui, roulant sur la couche d'accrochage non recouverte de bitume, contribuaient, avec les chenilles du finisseur, à enlever en partie ladite couche d'accrochage au passage de leurs roues, précisément au niveau des parties de la chaussée ultérieurement les plus sollicitées par les charges occasionnées par le passage des poids lourds,
  • de plus, ces répandeuses étaient à l'origine de salissures à la fois gênantes et dangereuses pour les usagers utilisant les chaussées adjacentes.
However, it has recently appeared, as has been explained in document EP-A-292.337, that this method of proceeding has numerous drawbacks:
  • road spreaders, which had a large footprint and poor maneuverability, were poorly suited to urban construction sites,
  • in addition, the asphalt paver was supplied by asphalt trucks, which, rolling on the bonding layer not covered with bitumen, helped, with the paver's tracks, to partially remove said bonding layer when passing their wheels, precisely at the level of the parts of the roadway later most stressed by the loads caused by the passage of heavy goods vehicles,
  • in addition, these spreaders were the source of both embarrassing and dangerous soiling for users using the adjacent roadways.

Or, un mauvais collage entraîne systématiquement une faiblesse dans la structure de la chaussée et une dégradation par fatigue plus rapide.However, poor bonding systematically leads to weakness in the structure of the roadway and faster fatigue degradation.

Aussi a-t-il été proposé, notamment dans le document EP-A-292.337 ci-dessus mentionné, de réaliser le dépôt de la couche d'accrochage juste avant l'application des enrobés par le finisseur. Le dispositif proposé par EP-A-292.337 associe le finisseur à un châssis indépendant monté sur des moyens de roulement et se déplaçant devant ledit finisseur à la même vitesse que celui-ci, ledit châssis servant à l'épandage de la couche d'accrochage.It has therefore been proposed, in particular in document EP-A-292,337 mentioned above, to carry out the deposit of the bonding layer just before the application of asphalt by the paver. The device proposed by EP-A-292.337 associates the finisher with an independent chassis mounted on rolling means and moving in front of said finisher at the same speed as the latter, said chassis serving for spreading the bonding layer .

Ce dispositif n'évite cependant aucunement aux chenilles du finisseur de rouler dans la couche d'accrochage, et ce précisément dans les parties de ladite couche d'accrochage qui sont ultérieurement les plus sollicitées. En outre et surtout, les rampes d'épandage à multiples orifices utilisées sur les répandeuses de liant classique s'avèrent, en pratique, totalement inadaptées à ce nouveau dispositif : l'épandage sur le sol des quantités habituelles de liant - quantités qui sont relativement faibles (300 g par m² à 1,2 kg par m²) - est réalisé par déplacement de la rampe d'épandage à la vitesse du finisseur, c'est-à-dire à une vitesse beaucoup plus lente (3m/min à 6 m/min) que celle des répandeuses classiques (30 m/min à 100 m/min) ; cet ensemble doit générer un débit de liant peu important, dès lors les orifices des buses d'épandage classiques ne conviennent plus et doivent avoir un diamètre très faible, elles ont tendance à se boucher du fait de la viscosité des liants utilisés.However, this device does not in any way prevent the tracks of the paver from rolling in the bonding layer, and this precisely in the parts of said bonding layer which are subsequently the most stressed. In addition and above all, the spreading booms with multiple orifices used on conventional binder spreaders prove, in practice, totally unsuitable for this new device: the spreading on the ground of the usual quantities of binder - quantities which are relatively low (300 g per m² to 1.2 kg per m²) - is achieved by moving the spreading ramp at the speed of the paver, that is to say at a much slower speed (3m / min at 6 m / min) than that of conventional spreaders (30 m / min to 100 m / min); this assembly must generate a low binder flow rate, therefore the orifices of the conventional spreading nozzles are no longer suitable and must have a very small diameter, they tend to become clogged due to the viscosity of the binders used.

Le document GB-A-1.041.511 enseigne un dispositif de pulvérisation destiné à répandre du goudron ou du bitume. Ce dispositif comprend une rampe d'épandage munie de buses de projection, ainsi que de deux jupes de protection montées de part et d'autre et le long de la rampe d'épandage.Document GB-A-1,041,511 teaches a spraying device intended to spread tar or bitumen. This device comprises a spreading ramp provided with projection nozzles, as well as two protective skirts mounted on either side and along the spreading ramp.

Ce dispositif est muni d'un système de jet classique conçu de façon à pouvoir accélérer le goudron ou le bitume, substances très visqueuses même à plus de 100°C, à travers l'orifice de gicleur pour former un film liquide qui, éventuellement, sous l'effet du frottement de l'air, se transforme en gouttelettes d'une taille de quelques millimètres.This device is fitted with a conventional spray system designed so as to be able to accelerate the tar or bitumen, very viscous substances even at more than 100 ° C, through the nozzle orifice to form a liquid film which, possibly, under the effect of the friction of the air, becomes droplets of a size a few millimeters.

Du fait de la taille des gouttelettes produites, l'épandage de la substance se fait par gravité ou par l'inertie des gouttelettes qui ont toutes une vitesse initiale à la sortie du gicleur.Due to the size of the droplets produced, the spreading of the substance is done by gravity or by the inertia of the droplets which all have an initial speed at the outlet of the nozzle.

La présente invention a donc pour but de pallier à ces différents inconvénients et de proposer un dispositif à rampe d'épandage s'affranchissant des jets à orifice de très petit diamètre incompatible avec la viscosité des liants couramment utilisés. Elle propose notamment un dispositif d'épandage dans lequel les buses sont remplacées par une chambre contenant en son intérieur de l'émulsion nébulisée, ladite chambre étant munie en regard de la route d'une ouverture importante, permettant le dépôt de ladite émulsion nébulisée sur ladite route.The present invention therefore aims to overcome these various drawbacks and to provide a spreading ramp device overcoming jets with orifice of very small diameter incompatible with the viscosity of the binders commonly used. It notably proposes a spreading device in which the nozzles are replaced by a chamber containing inside its nebulized emulsion, said chamber being provided facing the road with a large opening, allowing the deposition of said nebulized emulsion on said road.

Par ailleurs, le dispositif proposé par l'invention présente également l'avantage d'être d'un encombrement suffisamment faible pour pouvoir être placé à l'arrière du finisseur, derrière les chenilles de celui-ci, entre lesdites chenilles et les moyens d'épandage sur la route des enrobés bitumineux.Furthermore, the device proposed by the invention also has the advantage of being compact enough to be able to be placed at the rear of the finisher, behind the tracks thereof, between said tracks and the means of spreading of asphalt mixes on the road.

La présente invention a donc pour objet un dispositif d'épandage d'une émulsion d'accrochage d'enrobés bitumineux sur la surface d'une route, comportant, sur un engin mobile au moins une rampe d'épandage le long de laquelle l'épandage est au moins partiellement réalisé, ladite rampe étant associée à un circuit d'alimentation en émulsion, et comprenant au moins une chambre comportant au moins une ouverture sur sa partie destinée à être en regard de la route, ladite chambre étant associée à des moyens d'alimentation et de nébulisation permettant d'alimenter ladite chambre en son intérieur en émulsion nébulisée, caractérisé en ce que ladite chambre (19) est aussi associée à des moyens de répulsion, qui se trouvent sur le revêtement intérieur de ladite chambre, destinés à favoriser le dépôt de l'émulsion nébulisée vers la route à travers ladite ouverture.The present invention therefore relates to a device for spreading an emulsion for attaching bituminous mixes on the surface of a road, comprising, on a mobile machine at least one ramp spreading along which the spreading is at least partially carried out, said ramp being associated with an emulsion supply circuit, and comprising at least one chamber comprising at least one opening on its part intended to be opposite the on the road, said chamber being associated with supply and nebulization means making it possible to supply said chamber internally with nebulized emulsion, characterized in that said chamber (19) is also associated with repulsion means, which are located on the interior coating of said chamber, intended to promote the deposition of the nebulized emulsion towards the road through said opening.

Les moyens de répulsion destinés à favoriser le dépôt de l'émulsion sur la route comprennent, dans un mode de réalisation avantageux, un revêtement des parois, qui délimitent ladite chambre, par un matériau ayant une adhésivité à l'émulsion d'accrochage faible ou sensiblement nulle. Un matériau constituant ledit revêtement peut être, par exemple, du type polytétrafluoroéthylène.The repulsion means intended to promote the deposition of the emulsion on the road comprise, in an advantageous embodiment, a coating of the walls, which delimit said chamber, with a material having a low adhesion adhesion to the emulsion or substantially zero. A material constituting said coating can be, for example, of the polytetrafluoroethylene type.

Dans un autre mode de réalisation, lorsque l'émulsion d'accrochage est ionique ou chargée électriquement, ladite chambre est isolée électriquement de la masse de l'engin mobile, les parois de ladite chambre étant chargées électriquement avec une polarité identique à celle de l'émulsion. Les parois de ladite chambre peuvent être au moins partiellement en matériau métallique, notamment en un matériau métallique inoxydable. Les parois de la chambre peuvent être chargées positivement, l'émulsion étant une émulsion cationique.In another embodiment, when the bonding emulsion is ionic or electrically charged, said chamber is electrically isolated from the mass of the mobile machine, the walls of said chamber being electrically charged with a polarity identical to that of the 'emulsion. The walls of said chamber may be at least partially made of metallic material, in particular of a stainless metallic material. The walls of the chamber can be positively charged, the emulsion being a cationic emulsion.

La chambre est préférentiellement de longueur réglable.The chamber is preferably of adjustable length.

La chambre peut notamment comporter une partie principale associée à des moyens permettant une extension latérale de ladite partie principale. La chambre peut comporter une partie principale s'étendant sensiblement sur une largeur de l'engin mobile et associée à chacune de ses extrémités à des moyens d'extension latérale. Une chambre est délimitée, sur tout ou partie, par les parois d'un caisson muni d'une ouverture sur sa partie en regard de la route. En particulier, la partie principale de la chambre est délimitée par un caisson central qui s'étend sensiblement sur une largeur de l'engin mobile et qui est associé à chacune de ses extrémités à un caisson latéral relié de façon étanche par emboîtement audit caisson central, la longueur d'emboîtement relatif du caisson central et d'un caisson latéral étant réglable. La longueur de la chambre peut, par exemple, être réglée par l'intermédiaire de vérins hydrauliques.The chamber may in particular comprise a main part associated with means allowing a lateral extension of said main part. The chamber may comprise a main part extending substantially over a width of the mobile machine and associated at each of its ends with lateral extension means. A room is delimited, in whole or in part, by the walls of a box provided with an opening on its part facing the road. In particular, the main part of the chamber is delimited by a central box which extends substantially over a width of the mobile machine and which is associated at each of its ends with a side box connected in leaktight manner by fitting to said central box. , the relative nesting length of the central box and a side box being adjustable. The length of the chamber can, for example, be adjusted via hydraulic cylinders.

De préférence encore, les moyens d'alimentation et de nébulisation comprennent un atomiseur pneumatique associé à une arrivée d'émulsion et une arrivée de gaz sous pression. Le gaz sous pression peut être de l'air comprimé. Ces moyens d'alimentation et de nébulisation peuvent être répartis vers chacune des extrémités dela chambre et/ou vers sa partie médiane.More preferably, the supply and nebulization means comprise a pneumatic atomizer associated with an emulsion inlet and a pressurized gas inlet. The pressurized gas can be compressed air. These supply and nebulization means can be distributed towards each of the ends of the chamber and / or towards its middle part.

De façon avantageuse, l'ouverture de la chambre est entourée au moins partiellement par des jupes souples s'étendant, en position de fonctionnement de la rampe, de ladite ouverture jusqu'à sensiblement la surface de la route. La chambre peut aussi être entourée au moins partiellement par un (ou des) rideau(x) d'air pulsé. La chambre peut être associée à une buse d'alimentation en gaz ou air chaud.Advantageously, the opening of the chamber is surrounded at least partially by flexible skirts extending, in the operating position of the ramp, from said opening to substantially the surface of the road. The room can also be surrounded at least partially by one (or more) curtain (s) of forced air. The chamber can be associated with a gas or hot air supply nozzle.

La rampe est associée, de façon préférentielle, à des moyens montés sur l'engin mobile et permettant la mise en position de fonctionnement ou le relevage de ladite rampe par rapport à la route. Lesdits moyens de mise en position de fonctionnement ou de relevage peuvent être des vérins hydrauliques.The ramp is preferably associated with means mounted on the mobile machine and allowing the placing in the operating position or the raising of said ramp by compared to the road. Said means for placing in the operating position or for lifting can be hydraulic cylinders.

Un autre objet de l'invention est une machine de construction de chaussée du type finisseur comportant sur un châssis monté sur des moyens de déplacement, des moyens d'épandage d'enrobés bitumineux et des moyens d'alimentation desdits moyens d'épandage, caractérisée en ce qu'elle comporte un dispositif d'épandage d'une émulsion d'accrochage desdits enrobés sur la surface d'une route du type précédemment décrit.Another object of the invention is a paver construction machine of the finisher type comprising, on a chassis mounted on displacement means, means for spreading bituminous mixes and means for supplying said spreading means, characterized in that it comprises a device for spreading a bonding emulsion of said coated materials on the surface of a road of the type previously described.

Le dispositif d'épandage d'une émulsion d'accrochage est avantageusement disposé à l'arrière du châssis par rapport au sens de déplacement de la machine en cours d'étalage des enrobés. Le dispositif d'épandage d'une émulsion d'accrochage peut être disposé entre les moyens de déplacement de ladite machine et les moyens d'épandage d'enrobés bitumineux. Le dispositif d'épandage d'une émulsion d'accrochage peut, par exemple, être disposé sous la partie des moyens d'alimentation qui se trouvent à l'arrière du châssis, par rapport au centre de déplacement de la machine en cours d'épandage des enrobés. Lorsque les moyens d'alimentation comportent un tapis d'alimentation permettant de convoyer les matériaux d'une zone vers la partie avant de la machine jusqu'à une zone vers sa partie arrière, ledit tapis d'alimentation peut être sensiblement relevé et/ou incliné en sa partie arrière juste au-dessus des moyens d'épandage d'une émulsion d'accrochage.The device for spreading a bonding emulsion is advantageously arranged at the rear of the chassis with respect to the direction of movement of the machine during the spreading of the mixes. The device for spreading a bonding emulsion can be arranged between the means for moving said machine and the means for spreading bituminous mixes. The device for spreading a bonding emulsion may, for example, be arranged under the part of the supply means which are located at the rear of the chassis, relative to the center of movement of the machine being spreading of asphalt. When the feeding means comprise a feeding belt allowing the materials to be conveyed from a zone towards the front part of the machine to a zone towards its rear part, said feeding belt can be raised substantially and / or inclined in its rear part just above the spreading means of a bonding emulsion.

Préférentiellement, lorsque la machine comporte une cabine de pilotage, elle comporte aussi un réservoir d'émulsion monté sur la cabine de pilotage. Un réservoir interchangeable peut être monté sur vérins hydrauliques à hauteur réglable.Preferably, when the machine comprises a pilot cabin, it also comprises an emulsion tank mounted on the pilot cabin. An interchangeable tank can be mounted on hydraulic cylinders with adjustable height.

En outre, une telle machine peut comporter un groupe de dosage d'émulsion qui comprend une pompe doseuse alimentant les moyens de nébulisation ; elle peut comporter un ensemble de commandes permettant l'asservissement du débit et l'arrêt de l'alimentation en liant au déplacement et à la vitesse de la machine, ce dispositif d'épandage peut être apte à être dissocié rapidement du châssis de la machine.In addition, such a machine may include an emulsion dosing group which includes a metering pump supplying the means of nebulization; it can include a set of controls allowing the enslavement of the flow and the stopping of the supply by linking to the movement and the speed of the machine, this spreading device can be able to be quickly dissociated from the chassis of the machine .

La machine peut également comporter un réservoir d'émulsion calorifugé.The machine can also include a thermally insulated emulsion tank.

La description qui suit de l'invention est donnée à titre purement illustratif et non limitatif. Elle doit être lue en regard des dessins annexés.The following description of the invention is given purely by way of non-limiting illustration. It should be read in conjunction with the accompanying drawings.

Sur ces dessins :

  • La Figure 1 est une vue de côté d'une machine du type finisseur conforme à l'invention, c'est-à-dire équipée d'un dispositif d'épandage selon un mode de réalisation de l'invention ;
  • La Figure 2 est une vue schématique en coupe longitudinale du dispositif d'épandage de la Figure 1 ;
  • La Figure 3 est une vue schématique en coupe selon la ligne A-A de la Figure 2, d'une première variante possible du dispositif de la Figure 2 ;
  • La Figure 4, enfin, est une vue en coupe schématique, semblable à celle de la Figure 3, d'une deuxième variante possible du dispositif de la Figure 2.
In these drawings:
  • Figure 1 is a side view of a machine of the finisher type according to the invention, that is to say equipped with a spreading device according to one embodiment of the invention;
  • Figure 2 is a schematic view in longitudinal section of the spreading device of Figure 1;
  • Figure 3 is a schematic sectional view along line AA of Figure 2, of a first possible variant of the device of Figure 2;
  • Figure 4, finally, is a schematic sectional view, similar to that of Figure 3, of a second possible variant of the device of Figure 2.

En se référant plus particulièrement à la Figure 1, on voit qu'une machine du type finisseur conforme à l'invention, référencée par 1 dans son ensemble, est montée sur des chenilles 2 et comporte essentiellement une cabine de pilotage 3, une trémie 4 de réception des enrobés bitumineux, ladite trémie 4 étant disposée à l'avant du finisseur, des moyens 5 classiques d'épandage des enrobés bitumineux qui sont constitués notamment par une vis de répartition et qui sont disposés à l'arrière du finisseur 1, une table 6 de lissage des couches d'enrobés déposées, ainsi qu'un dispositif 7 d'épandage d'une émulsion de liant, associé à un circuit d'alimentation en émulsion référencé par 8 dans son ensemble.Referring more particularly to FIG. 1, it can be seen that a machine of the finisher type according to the invention, referenced by 1 as a whole, is mounted on tracks 2 and essentially comprises a pilot cabin 3, a hopper 4 for receiving bituminous mixes, said hopper 4 being disposed at the front of the paver, conventional means 5 for spreading bituminous mixes which are constituted in particular by a distribution screw and which are arranged at the rear of finisher 1, a table 6 for smoothing deposited asphalt layers, as well as a device 7 for spreading a binder emulsion, associated with an emulsion supply circuit referenced by 8 in its together.

Les enrobés bitumineux chauds sont transférés de façon classique de la trémie 4 aux moyens 5 d'épandage des enrobés par l'intermédiaire d'un tapis de transfert (non représenté) disposé sur le finisseur 1 entre la cabine 3 et la partie dudit finisseur 1 qui porte les chenilles 2. Ce tapis est légèrement surélevé en sa partie arrière au-dessus des moyens d'épandage 7. La table de lissage 6 est montée à l'arrière du finisseur 1, au-delà des moyens d'épandage des enrobés 5, sur deux bras coudés 9 s'étendant de chaque côté de l'engin à partir sensiblement de la partie médiane des chenilles jusqu'au-delà des moyens d'épandage 5. Ces deux bras 9 sont articulés à leur extrémité opposée à la table de lissage 6 sur des entretoises 10, montées, au niveau des chenilles 2, l'inclinaison desdits bras 9 par rapport au plan du terrain déterminant la hauteur de la table de lissage 6 et étant réglée par l'intermédiaire de vérins 11 s'étendant chacun entre un point d'attache sur l'entretoise 10 et un point d'attache 12 sur le côté du châssis du tracteur dans le prolongement du plancher de la cabine 3, à l'arrière de celle-ci.The hot bituminous mixes are transferred in a conventional manner from the hopper 4 to the means 5 for spreading the mixes via a transfer mat (not shown) placed on the finisher 1 between the cabin 3 and the part of said finisher 1 which carries the tracks 2. This carpet is slightly raised in its rear part above the spreading means 7. The smoothing table 6 is mounted at the rear of the finisher 1, beyond the asphalt spreading means 5, on two bent arms 9 extending on each side of the machine from substantially the middle part of the tracks to beyond the spreading means 5. These two arms 9 are articulated at their end opposite to the smoothing table 6 on spacers 10, mounted, at the level of the tracks 2, the inclination of said arms 9 relative to the plane of the ground determining the height of the smoothing table 6 and being adjusted by means of jacks 11 s' each extending between a attachment point on the spacer 10 and an attachment point 12 on the side of the tractor frame in the extension of the floor of the cabin 3, at the rear of the latter.

Le circuit d'alimentation 8 comporte essentiellement un réservoir 13 d'émulsion, d'une contenance supérieure à 2500 litres. Ce réservoir 13 est disposé au-dessus de la cabine 3 et s'étend sensiblement sur toute la longueur de celle-ci. Il est monté sur quatre vérins hydrauliques 14 de levage s'étendant perpendiculairement au plancher de la cabine 3 au voisinage de chacune des quatre extrémités de celui-ci. Ces vérins 14 permettent de régler à volonté la hauteur du réservoir 13 sur le finisseur 1, ledit réservoir 13 admettant, par exemple, une position haute d'utilisation et une position basse de rangement facilitant le transport du finisseur 1. Ce réservoir 13 est un container-cartouche pouvant être remplacé en cours de fonctionnement, si nécessaire, les parois de ce réservoir 13 comportant des orifices à valve destinés à coopérer avec les extrémités mâles de tuyauteries 15 et 16, qui sont des tuyauteries d'alimentation et de renvoi reliant le réservoir 13 à un groupe de dosage 17 de l'émulsion de liant fournissant débit et pression. Le réservoir 13 est en outre un réservoir calorifugé pouvant être réchauffé électriquement.The supply circuit 8 essentially comprises an emulsion reservoir 13, with a capacity greater than 2500 liters. This reservoir 13 is disposed above the cabin 3 and extends substantially over the entire length thereof. It is mounted on four hydraulic lifting cylinders 14 extending perpendicular to the floor of the cabin 3 in the vicinity of each of the four ends thereof. These jacks 14 allow the height of the tank 13 to be adjusted at will on the finisher 1, said tank 13 admitting, for example, a high position of use and a low storage position facilitating the transport of the finisher 1. This tank 13 is container-cartridge can be replaced during operation, if necessary, the walls of this tank 13 having orifices with valve intended to cooperate with the male ends of pipes 15 and 16, which are supply and return pipes connecting the reservoir 13 to a dosing group 17 of the binder emulsion providing flow and pressure. The reservoir 13 is furthermore a thermally insulated reservoir which can be electrically heated.

En se référant plus particulièrement aux Figures 2 à 4, on voit que le dispositif 7 d'épandage de liant comporte une rampe d'épandage 18 qui est constituée essentiellement par une chambre 19 contenant en son intérieur de l'émulsion sous forme nébulisée.Referring more particularly to FIGS. 2 to 4, it can be seen that the device 7 for spreading binder comprises a spreading ramp 18 which essentially consists of a chamber 19 containing inside its emulsion in nebulized form.

Cette chambre 19 est délimitée par les parois d'un caisson principal 20 qui est un caisson de section droite en forme de U s'étendant selon sensiblement toute la largeur du finisseur 1 et dont la partie ouverte est en regard de la chaussée C. La chambre 19 est en outre aussi délimitée latéralement par les parois de deux caissons secondaires 21 et 22 qui prolongent le caisson 20 principal sur chacun de ses côtés. Les deux caissons secondaires 21 et 22 permettent donc de réaliser, si nécessaire, des extensions dudit caisson principal 20. Ils sont chacun associés à un vérin hydraulique 23 dont le cylindre s'étend respectivement sur sensiblement une demie-largeur du caisson principal 20 et dont la tige mobile 24 est reliée aux caissons secondaires 21 ou 22 auxquels ledit vérin est associé par l'intermédiaire d'une entretoise 25 qui leur est solidarisée à leur extrémité la plus éloignée du caisson principal 20.This chamber 19 is delimited by the walls of a main caisson 20 which is a U-shaped cross section caisson extending along substantially the entire width of the paver 1 and the open part of which faces the roadway C. The chamber 19 is also also delimited laterally by the walls of two secondary boxes 21 and 22 which extend the main box 20 on each of its sides. The two secondary boxes 21 and 22 therefore make it possible, if necessary, to extend said main box 20. They are each associated with a hydraulic cylinder 23 whose cylinder extends respectively over substantially half the width of the main box 20 and whose the movable rod 24 is connected to the secondary boxes 21 or 22 with which said jack is associated by means of a spacer 25 which is secured to them at their end furthest from the main box 20.

Le caisson 20 est maintenu sur le châssis finisseur 1 par l'intermédiaire de deux vérins 26 dont les tiges sont articulées sur le caisson 20 vers les deux extrémités de celui-ci et qui sont montées de chaque côté du finisseur 1. Ces deux vérins 26 servent de vérins d'appui et de relevage de la rampe d'épandage 18 par rapport à la chaussée C. Le caisson 20 est destiné à permettre l'épandage de l'émulsion ou liant selon la largeur du finisseur 1, les deux caissons secondaires 21 ou 22 permettant de créer des extensions droite et gauche par rapport audit caisson principal 20 et de réaliser un épandage d'émulsion sur les surlargeurs du finisseur 1. Dans tous les cas, l'épandage est réalisé perpendiculairement à l'axe de déplacement de la machine.The box 20 is held on the finisher frame 1 by means of two jacks 26, the rods of which are articulated on the box 20 towards the two ends of the latter and which are mounted on each side of the finisher 1. These two jacks 26 serve as support and lifting cylinders for the spreading ramp 18 relative to the carriageway C. The box 20 is intended to allow the spreading of the emulsion or binder, depending on the width of the finisher 1, the two boxes secondary 21 or 22 to create right and left extensions relative to said main box 20 and to carry out an emulsion spreading on the widths of the finisher 1. In all cases, the spreading is carried out perpendicular to the axis of movement of the machine.

Chacune des parois extrêmes latérales des caissons secondaires 21 et 22 est munie d'un atomiseur d'émulsion 27 pneumatique sur lequel est branché, d'une part, une arrivée 28 d'air comprimé et une arrivée 29 servant à l'alimentation en liant. Ces deux atomiseurs 27 créent, dans l'ensemble de la chambre 19, lorsqu'ils sont alimentés, une ambiance sursaturée en émulsion nébulisée. Le caisson principal 20 est en outre associé, vers sa partie médiane, à une conduite 30 reliée à un circuit d'air chaud et destinée au dégourdissage de l'ensemble de la chambre 19, lors de la mise en service après arrêt du dispositif d'épandage. Le caisson 20 est entouré extérieurement au niveau de son ouverture par, sur chacun de ses côtés dans sa longueur, d'une jupe 31 s'étendant en position de travail de la rampe d'épandage 18, de ladite ouverture jusqu'à la chaussée C. Les parois des caissons 21 et 22 sont quant à elles entourées intérieurement au niveau de l'ouverture de la chambre 19 par des jupes 32 s'étendant elles aussi de ladite ouverture jusqu'à la chaussée C, en position de travail de la rampe d'épandage 18. Les jupes 31 et 32 sont complétées par un rideau d'air 33 basse pression assurant l'abattage de fuites éventuelles et entourant l'ouverture de la chambre 19, l'ensemble permettant de délimiter de façon étanche sur la chaussée C la surface de dépôt de l'émulsion nébulisée.Each of the lateral extreme walls of the secondary boxes 21 and 22 is provided with a pneumatic emulsion atomizer 27 to which is connected, on the one hand, an inlet 28 of compressed air and an inlet 29 serving for the supply of binder . These two atomizers 27 create, in the whole of the chamber 19, when they are supplied, an atmosphere supersaturated with nebulized emulsion. The main box 20 is also associated, towards its middle part, with a pipe 30 connected to a hot air circuit and intended for the stripping of the whole of the chamber 19, during the commissioning after stopping of the device d spreading. The box 20 is surrounded externally at its opening by, on each of its sides in its length, a skirt 31 extending in the working position of the spreading ramp 18, from said opening to the floor C. The walls of the boxes 21 and 22 are in turn surrounded internally at the opening of the chamber 19 by skirts 32 also extending from said opening to the floor C, in the working position of the spreading ramp 18. The skirts 31 and 32 are completed by a low pressure air curtain 33 ensuring the elimination of any leaks and surrounding the opening of the chamber 19, the assembly making it possible to delimit in a sealed manner on the pavement C the deposit surface of the nebulized emulsion.

L'ensemble du dispositif est encore complété par un distributeur d'air haute et basse pression ainsi que par un ensemble de commandes.The entire device is further supplemented by a high and low pressure air distributor as well as a set of controls.

La chambre 19 est associée à des moyens destinés à favoriser le dépôt de l'émulsion nébulisée à travers son ouverture sur la chaussée C. Ces moyens de répulsion permettent une répartition homogène de l'émulsion nébulisée sur la chaussée C en évitant, par exemple, que l'émulsion ne s'amalgame par plaques sur les parois de la chambre 19, lesquelles plaques se décrochant sous l'effet de leur poids pourraient être à l'origine d'irrégularités sur la surface déposée.Chamber 19 is associated with means intended to promote the deposition of the nebulized emulsion through its opening on the pavement C. These repulsion means allow a homogeneous distribution of the emulsion nebulized on the pavement C, avoiding, for example, that the emulsion does not amalgamate by plates on the walls of the chamber 19, which plates detaching under the effect of their weight could be at the origin of irregularities on the deposited surface.

Ainsi qu'on l'a plus particulièrement représenté sur la Figure 3, les moyens précités peuvent être par exemple constitués par des moyens permettant de charger positivement les parois de la chambre 19, c'est-à-dire les parois du caisson 20 et des caissons secondaires 21 et 22, l'émulsion utilisée étant une émulsion cationique, les caissons 20, 21 et 22 étant des caissons métalliques, par exemple en inox. Sous l'effet de la répulsion électrique, les particules de l'émulsion nébulisée, repoussées par rapport aux parois de la chambre, vont être précipitées vers le sol, dont le potentiel est à la masse.As shown more particularly in FIG. 3, the aforementioned means can for example be constituted by means making it possible to positively charge the walls of the chamber 19, that is to say the walls of the box 20 and secondary boxes 21 and 22, the emulsion used being a cationic emulsion, boxes 20, 21 and 22 being metal boxes, for example made of stainless steel. Under the effect of electrical repulsion, the particles of the nebulized emulsion, repelled relative to the walls of the chamber, will be precipitated towards the ground, whose potential is grounded.

Dans une autre variante possible, représentée sur la Figure 4, les parois du caisson sont revêtues intérieurement d'un matériau du type polytétrafluoroéthylène, dont l'adhésivité à l'émulsion nébulisée est faible ou nulle et qui sert de moyen de répulsion. La sursaturation obtenue dans le caisson provoque le ruissellement de l'émulsion sur les parois des caissons 20, 21 et 22, puis les jupes 31 et 32 assurent le lissage et la répartition de l'émulsion sur la chaussée C.In another possible variant, shown in Figure 4, the walls of the box are coated internally with a material of the polytetrafluoroethylene type, whose adhesion to the nebulized emulsion is low or zero and which serves as a means of repulsion. The supersaturation obtained in the box causes the emulsion to run off on the walls of the boxes 20, 21 and 22, then the skirts 31 and 32 ensure the smoothing and distribution of the emulsion on the pavement C.

Les signes de référence insérés après les caractéristiques techniques mentionnées dans les revendications ont pour seul but de faciliter la compréhension de ces dernières et n'en limitent aucunement la portée.The reference signs inserted after the technical characteristics mentioned in the claims are intended only to facilitate the understanding of the latter and in no way limit their scope.

Claims (31)

  1. Device for spreading a fluid substance, in particular a bonding emulsion for bituminous coated materials, over the surface of a road (C), comprising, on a movable machine (1), at least one spreading bar (18) along which the spreading is effected at least partially, said bar being associated with an emulsion-supply circuit and comprising at least one chamber (19) comprising at least one aperture on its part intended to be opposite the road (C), said chamber (19) being associated with supply and nebulization means (27, 28, 29) allowing to supply the inside of said chamber (19) with nebulized emulsion, characterized in that said chamber (19) is also associated with repulsion means provided on the internal coating of said chamber intended to promote the deposition of the nebulized emulsion on the road (C) through said aperture.
  2. Device according to claim 1, characterized in that the repulsion means comprise a coating of the walls which define said chamber (19) with a material having a low, or substantially no adhesion to the bonding emulsion.
  3. Device according to claim 2, characterized in that a material constituting said coating is of the polytetrafluoroethylene type.
  4. Device according to one of claims 1 to 3, for the spreading of an ionic or electrically charged bonding emulsion, characterized in that said chamber (19) is insulated electrically from the mass of the movable machine (1), the walls of said chamber (19) being charged electrically with a polarity identical to that of the emulsion.
  5. Device according to claim 4, characterized in that the walls of said chamber are at least partially made from metal, in particular from non-oxidizing metal.
  6. Device according to one of claims 4 or 5, characterized in that the walls of the chamber (19) are positively charged, the emulsion being a cationic emulsion.
  7. Device according to one of claims 1 to 6, characterized in that the length of the chamber (19) can be adjusted.
  8. Device according to claim 7, characterized in that the chamber (19) comprises a main part (20) which is associated with means (21, 22, 23, 24, 25) enabling said main part to be extended laterally.
  9. Device according to claim 8, characterized in that the chamber (19) comprises a main part (20) extending substantially over a width of the movable machine (1) and associated at each of its ends with lateral-extension means (21, 22, 23, 24, 25).
  10. Device according to one of the preceding claims, characterized in that a chamber (19) is delimited, wholly or partly, by the walls of a box which is equipped with an aperture on its part opposite the road.
  11. Device according to claims 9 and 10 taken in combination, characterized in that the main part of the chamber (19) is delimited by a central box (20) which extends substantially over a width of the movable machine (1) and which is associated at each of its ends with a lateral box (21, 22) connected leaktightly by fitting together with said central box, the length of the relative fitting-together of the central box and of a lateral box being adjustable.
  12. Device according to one of the preceding claims taken in combination with claim 7, characterized in that the length of the chamber (19) is adjusted via hydraulic jacks (23, 24).
  13. Device according to one of the preceding claims, characterized in that the supply and nebulization means comprise a pneumatic atomizer (27) associated with an emulsion inlet (29) and a pressurized-gas inlet (28).
  14. Device according to claim 13, characterized in that the pressurized gas is compressed air.
  15. Device according to one of the preceding claims, characterized in that supply and nebulization means (27, 28, 29) are distributed toward each of the ends of the chamber (19) and/or toward its mid part.
  16. Device according to one of the preceding claims, characterized in that the aperture of the chamber is surrounded at least partially by flexible skirts (31, 32) which extend, in the operating position of the bar (18), from said aperture substantially to the surface of the road (C).
  17. Device according to any one of the preceding claims, characterized in that the aperture of the chamber (19) is surrounded at least partially by a curtain or curtains (33) of pulsed air.
  18. Device according to any one of the preceding claims, characterized in that the chamber (19) is associated with a nozzle (30) for supplying gas or hot air.
  19. Device according to any one of the preceding claims, characterized in that the bar (18) is associated with means (26) mounted on the movable machine (1) and enabling said bar (18) to be placed in the operating position or to be raised with respect to the road (C).
  20. Device according to claim 19, characterized in that said means for placing in the operating position or for raising are hydraulic jacks (26).
  21. A highway-construction machine of the finisher type, comprising, on a frame mounted on displacement means (2), means (5) for spreading bituminous coated materials and means (4) for supplying said spreading means (5), characterized in that it comprises a device (7) for spreading a bonding emulsion for said coated materials over the surface of a road (C) according to one of claims 1 to 20.
  22. Machine according to claim 21, characterized in that the device (7) for spreading a bonding emulsion is arranged at the rear of the frame with respect to the direction of displacement of the machine during the spreading of the coated materials.
  23. Machine according to claim 22, characterized in that the device (7) for spreading a bonding emulsion is arranged between the displacement means (2) of said machine and the means (5) for spreading bituminous coated materials.
  24. Machine according to claim 23, characterized in that the device (7) for spreading a bonding emulsion is arranged beneath the part of the supply means which are located at the rear of the frame, with respect to the center of displacement of the machine during spreading of the coated materials.
  25. Machine according to claim 24, in which the supply means comprise a supply belt which enables the materials to be conveyed from a zone (4) toward the front part of the machine to a zone (5) toward its rear part, characterized in that said supply belt is substantially raised and/or inclined at its rear part just above the means (7) for spreading a bonding emulsion.
  26. Machine according to one of claims 21 to 25, comprising a control cabin (3), characterized in that it comprises an emulsion tank (13) mounted on the control cabin (3).
  27. Machine according to claim 26, characterized in that an interchangeable tank is mounted on height-adjustable hydraulic jacks (14).
  28. Machine according to one of claims 21 to 27, characterized in that it comprises a heat-insulated emulsion tank.
  29. Machine according to one of claims 21 to 28, characterized in that it comprises an emulsion-metering unit which comprises a metering pump supplying the nebulization means.
  30. Machine according to one of claims 21 to 29, characterized in that it comprises a set of control means allowing the flow control the stopping of the binder supply to be made dependent upon the displacement and the speed of the machine.
  31. Machine according to one of claims 21 to 30, characterized in that the spreading device with which it is associated is capable of being disconnected rapidly from the frame of the machine.
EP91401574A 1990-06-21 1991-06-13 Device for spreading a fluid substance and apparatus for simultaneously applying this substance and a road-covering material Expired - Lifetime EP0462873B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007807A FR2663654B1 (en) 1990-06-21 1990-06-21 DEVICE FOR SPREADING A FLUID SUBSTANCE AND MACHINE FOR THE SIMULTANEOUS APPLICATION OF SUCH SUBSTANCE AND COATING OF A PAVEMENT.
FR9007807 1990-06-21

Publications (2)

Publication Number Publication Date
EP0462873A1 EP0462873A1 (en) 1991-12-27
EP0462873B1 true EP0462873B1 (en) 1994-11-09

Family

ID=9397884

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Application Number Title Priority Date Filing Date
EP91401574A Expired - Lifetime EP0462873B1 (en) 1990-06-21 1991-06-13 Device for spreading a fluid substance and apparatus for simultaneously applying this substance and a road-covering material

Country Status (7)

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US (1) US5178486A (en)
EP (1) EP0462873B1 (en)
AT (1) ATE114008T1 (en)
DE (1) DE69105054T2 (en)
DK (1) DK0462873T3 (en)
ES (1) ES2064940T3 (en)
FR (1) FR2663654B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5533828A (en) * 1994-09-29 1996-07-09 Astec Industries, Inc. Method and apparatus for discharging paving materials on top of distributing auger
US5895173A (en) * 1996-07-26 1999-04-20 E. D. Etnyre & Co. Roadway paving apparatus
GB2342943B (en) * 1998-10-23 2000-11-01 Colas Sa Mixing and surfacing apparatus
US6805516B2 (en) 2001-06-04 2004-10-19 E.D. Etnyre & Co. Roadway paving system and method including roadway paving vehicle and supply truck
EP2119831B1 (en) * 2008-05-14 2016-03-30 Joseph Vögele AG Paver

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1041511A (en) * 1964-03-03 1966-09-07 Johnston Brothers Eng Improvements in or relating to ground spraying apparatus
US4018540A (en) * 1974-03-05 1977-04-19 Jackson Sr James A Road maintenance machine
US4688964A (en) * 1986-06-26 1987-08-25 Cox Harold C Method and apparatus for applying seal coating to asphalt pavement
FR2611766B1 (en) * 1987-02-24 1989-06-30 Screg Routes & Travaux BITUMINOUS EMULSION SPREADING DEVICE ON THE SURFACE OF A ROAD WITHOUT TRUCK TRAFFIC ON THE HANGING LAYER MADE BY EMULSION SPREADING
FR2650005B1 (en) * 1989-07-21 1994-04-15 Screg Routes Travaux Publics METHOD AND DEVICE FOR PRODUCING A SURFACE COATING ON A SURFACE SUCH AS A PAVEMENT

Also Published As

Publication number Publication date
EP0462873A1 (en) 1991-12-27
DE69105054T2 (en) 1995-04-13
US5178486A (en) 1993-01-12
FR2663654B1 (en) 1992-10-09
ES2064940T3 (en) 1995-02-01
DK0462873T3 (en) 1995-04-24
FR2663654A1 (en) 1991-12-27
DE69105054D1 (en) 1994-12-15
ATE114008T1 (en) 1994-11-15

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