WO2015023171A1 - Support station having a single concave roller for troughing a conveyor belt and conveyor comprising same - Google Patents

Support station having a single concave roller for troughing a conveyor belt and conveyor comprising same Download PDF

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Publication number
WO2015023171A1
WO2015023171A1 PCT/MA2013/000027 MA2013000027W WO2015023171A1 WO 2015023171 A1 WO2015023171 A1 WO 2015023171A1 MA 2013000027 W MA2013000027 W MA 2013000027W WO 2015023171 A1 WO2015023171 A1 WO 2015023171A1
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WO
WIPO (PCT)
Prior art keywords
conveyor
station
roller
support
concave
Prior art date
Application number
PCT/MA2013/000027
Other languages
French (fr)
Inventor
Mohamed MOUSSADEK
El Mehdi MOUSSADEK
Original Assignee
Moussadek Mohamed
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 Moussadek Mohamed filed Critical Moussadek Mohamed
Publication of WO2015023171A1 publication Critical patent/WO2015023171A1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/08Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration the load-carrying surface being formed by a concave or tubular belt, e.g. a belt forming a trough
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G39/00Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
    • B65G39/02Adaptations of individual rollers and supports therefor

Definitions

  • the present invention relates to a path roller designed with a concave surface describing an arc to receive, deform into a deep trough and advance an elastomeric conveyor belt in the direction of travel of a conveyor.
  • belt conveyors also called belt conveyors is widely used in industry, mines, cement plants, quarries and agriculture.
  • Belt conveyors have seen a number of improvements throughout their history that have focused on increasing throughput, correcting operational problems and improving the safety of production and maintenance personnel.
  • the operating principle of a conveyor is simple. It consists in advancing, throughout the path required to move a material from a loading point to an unloading point, an elastomeric strip held taut by end drums placed at the top and bottom of the conveyor.
  • Support stations having 3 rolls each, are arranged at regular intervals along the conveyor infrastructure. Their role is to support (receive and deform in deep trough) and advance an elastomeric band and the load it contains. According to this principle of operation the band then fulfills a dual role: to contain the product to be transported AND to transmit all along its strand the force necessary for its displacement.
  • the support stations are mounted on metal supports called trestles, and are arranged 3 rollers in a trapezoidal configuration.
  • the support stations have undergone a deep improvement. It was a question of placing a horizontal roller in the center of the station, and two inclined lateral rollers placed on both sides of the said central roll. Because in the design prior to this improvement the support stations had only two rollers arranged in V, but which had other problems such as the limit of the capacity of containment and the break of the reinforcement structure of the band because of the weakness of the radius of curvature.
  • the configuration thus obtained represents a trapezoidal geometry that has allowed both to better support the band at the center of the width of the conveyor, and also to increase the capacity of the band which carries more material per linear meter. 1
  • the design of the three-roller support stations offers no possibility of motorization of said stations, and makes all improvements to increase the flow and stabilize the band focus on the geometric shape of the arrangement of the rollers AND on the robustness of the band. This does not make it possible to eliminate definitively the problems of the offsets of the band, those of the exaggerated energetic demands due to the weight and the rigidity of the band, and those related to the difficulty to advance it inside support stations with three rollers.
  • the conventional roller is made by assembling a cylindrical spindle and a through shaft with a diameter of 20 to 35 mm I through the ball bearing housings provided with sealing devices presents, for its part, another source of vulnerability.
  • the infiltration of water and / or dust causes damage to bearings that no longer rotate, which blocks the rotation of the pox thus creating additional resistance to progress the band and consequently an increase in energy demands, overheating of the band and especially the piercing of the so-called cylindrical pox that becomes sharp and tears the band.
  • Other more serious problems can also occur following the jamming of the pox, it is in particular the fall of the rollers which can have serious consequences for the safety of the personnel.
  • the trapezoidal shape that must take the band confining itself in the said stations is too restrictive for it, and said band must deform into a trough in a brittle configuration and not concave which fatigues its reinforcement structure and its coatings both superior and inferior.
  • CN 102502204 which describes a support station which has a horizontal central portion, and conical side edges and a shaft projecting on both sides of the station for mounting on rolling bearings.
  • This solution may be ineffective for 45-degree inclination angles, because with this level of inclination it will be very difficult to advance the belt and the load it contains.
  • the support stations of the prior art composed of three independent rollers in their rotational movement allowed deformations ranging from 20 to 45 ° with respect to the horizontal plane and for widths of the band ranging from 400 mm to 2200 mm and with diameters traversing axes ranging from only 20 to 35 mm, precisely because there was freedom of movement of the rollers relative to each other. And this is where lies the great technical advantage of the support stations of the prior art: tangential contact with the band and an independence of the rotation compared to other rollers of the same station.
  • the solution of the station described in the document CN 102502204 can not offer significant inclinations up to 45 ° without causing a blockage of; the band inside the said station.
  • CN 28953328 discloses a station composed of a plurality of rollers having concave surfaces for closing a tubular conveyor belt. Apart from the pox which is concave, the roller described in document CN28953328 retains the same principle as the conventional roller used in the three-roller support stations arranged in a trapezoidal shape, namely; a flattened attachment and bearing housings provided with sealing devices.
  • the present invention aims to overcome the disadvantages and gaps that still exist in the state of the art. It proposes a support station composed of a single
  • a roll whose surface is concave describing an arc of a circle, two lateral flanges mounted on either side of said pox, and a through shaft with a diameter of not more than 35 mm suitable for being mounted on rolling bearings placed on the edges of the conveyor frame.
  • the constituent elements of the new support station in this case the concave pomegranate, the two lateral flanges and the traversing shaft whose diameter does not exceed 35 mm, are assembled by welding and constitute a single piece capable of being mounted on standard bearings. placed on either side of the conveyor frame to receive, distort deep trough and advance the elastomeric conveyor belt and the load it contains.
  • the new support station according to the invention constitutes a permanent part of the conveyor, and has enough flexural strength thanks to the arcuate shape of the pox while maintaining the diameter of the through shaft within the limit of 35 mm. maximum.
  • the new support station according to the invention aims to eliminate the problem of bending while keeping the diameter of the traversing shaft in the standard dimensions between 20 and 35 mm and that in proportion to the length of the pox.
  • This is possible with the concave shape of the pox which has the technical advantage of better resisting radial forces and eliminating, thanks to the arcuate shape of the pox, all the radial forces that can bend the tree crossing.
  • This then makes it possible to keep the diameter of the traversing shaft in the standard dimensions (between 20 and 35 mm), which does not impact the total weight of the station, and allows the use of standard bearings sealed and greased to life, which significantly reduces investment and maintenance costs. Because it is not necessary to maintain standard bearings with sealed bearings and greased for life
  • the concave shape of the pox according to the invention overcomes the disadvantages left by! the document CN 102502204 eliminating the problems of bending the shaft with its arcuate shape which has a better resistance to radial forces compared to the solution recommended by the document CN 102502204 which proposes a roll with a central portion horizontal and conical side edges .
  • i allows the use of a traversing shaft with a diameter of not more than 35 mm, whereas for the document CN102502204 the traversing shaft must have a much larger diameter precisely to withstand flexion, hence its vulnerability too good technical (large diameter of the shaft therefore more weight and more electrical energy) than economic (large diameter shaft involves bearings with bearings 1 large diameters and maintenance operations).
  • the new station according to the invention considerably reduces the investment costs and offers more economic benefits related to the increase in productivity (fewer conveyor stops) and the improvement safety of maintenance personnel (not falling rollers).
  • the present invention has the technical advantage of extemalizing the rolling elements, namely rolling bearings, outside the pox.
  • the shaft passing through not exceeding 35 mm is to be placed on bearings installed on either side of the conveyor frame, which eliminates; the vulnerability of seals, and that of fixing and makes more stable the movement of the rotation generated by the passage of the band. It is clear that the sealing of bearings of standard bearings have a better resistance to infiltration of water and dust in comparison with the sealing of the bearing housings mounted inside the pox as recommended by CN28953328.
  • the present invention aims to overcome these disadvantages.
  • the present invention provides a device for receiving, deforming the belt of a deep trough conveyor and facilitating its movement, characterized in that it has a single roller with a concave pore describing a circular arc, two side plates reinforced by ribs and mounted on both sides of the said pox, and a traversing shaft with a diameter not exceeding 35 mm, capable of being mounted on conventional bearings with bearings placed on the edges of the conveyor frame.
  • the concave pox describing a circular arc is obtained by the assembly by welding of two cones shaped by the embossing technique and arranged back to back.
  • the disc-shaped lateral flanges have reinforcing ribs on their inner faces, and are welded to the edges of the concave pox.
  • the traversing shaft is fixed on the flanges by welding. Overflowing on both sides of the pox it is intended to be mounted on conventional bearing bearings.
  • the arcuate concave pox is made from thermosetting (or thermoplastic) technical polymer material reinforced with a filler such as fiberglass, for example.
  • a filler such as fiberglass
  • the so-called concave pox is obtained whole and in one piece. Nuts are to be inserted in the mold, before casting, around the edges of the pox to receive the flanges which, according to this variant, are joined to the pox by bolts.
  • the traversing shaft with a maximum diameter of 35 mm is assembled with the side flanges by welding.
  • the device thus obtained, according to one of the two embodiments of the invention is a one-piece piece adapted to be mounted on conventional rolling bearings placed on both sides of the conveyor, and which turns when the tape is moving forward. .
  • the support station characterized in that it comprises a single concave roller, two lateral flanges and a traversing shaft of a diameter not exceeding! 35 mm, receives the band and deforms it deep trough a geometry circle arq, and not brittle compared to that of the three-reel stations known in the prior art which were arranged in a trapezoidal geometry.
  • the device according to the invention obtained by assembling two cones welded back to back and comprising two flanges and a shaft traversing the whole sealed by welding, or
  • the device according to the invention is particularly intended to be placed, in sufficient quantity, on a conveyor to form a concave bed adapted to receive and deform a conveyor belt, characterized in that the strip permanently maintains tangential contact with the entire surface of the conveyor belt. concave roll. According to the invention, the bending of the internal reinforcing structure of the strip is attenuated, and the severe lateral bending experienced by the strip in the stations of the prior art is eliminated.
  • the device is monoblock characterized in that the entire concave surface rotates at the same time with the advance of the strip, this eliminates the parasitic forces that the band underwent at the empty spaces between the horizontal central roller and the rollers inclined stations of the prior art. According to the invention, the problems of off-centering of the web caused by the empty spaces between the conventional rolls and the difference in the speed of the rollers
  • the support station characterized in that it comprises a single roll whose surface is concave describing a circular arc, is a permanent part of the conveyor contrary to the conventional rollers of the prior art which were parts of wear that had to be changed periodically.
  • the device is intended for lifetime operation on conveyors. This reduces maintenance costs (conventional roll costs, labor costs and lost revenue costs due to unplanned outages), and routine inspection and monitoring operations to locate rolls blocked or jammed required for the use of multi-roll support stations. As it eliminates all the risks related to falling rolls since the support station is mounted on rolling bearings installed on the edges of the conveyor, and can not under any circumstances present such risks (fall). The safety of personnel working on or around the conveyor is greatly increased with the concave roller station.
  • the support station according to the invention is to be installed on the chassis of the conveyor by means of roller bearings, and is able to receive an endless elastomer conveyor belt, deforming it into a deep curvature following the arc of a circle. described by the pox; the displacement of the strip rotates the concave roller with less resistance compared to the support station composed of three rollers arranged in a geometrical shape. This represents a first way of using the support station according to the invention.
  • the traversing shaft is provided with a member of the mechanical transmission a pulley with several grooves or a pinion with double toothing, a member of the same type (pulley or pinion according to the selected configuration) is to be installed on the control drum shaft opposite to the control unit (the free side of the drum shaft).
  • All these elements of the mechanical transmission are joined by belts or by chains (according to the selected configuration) for transmitting the rotational movement of the control drum driven by the geared motor unit to the set of concave roller support stations,
  • the control unit rotates the drum whose shaft is joined to the first station to concave roller, the same station being linked by a member of the mechanical transmission (belt or chains) to the station that follows it transmits this movement, and so on until the last station installed near the hopper loading.
  • Each station receives the movement of the station which is installed to its lover to transmit it to that located downstream.
  • the set of concave roller stations is driven by the control group in a synchronized movement, which facilitates the movement of the band and the load that it contains.
  • this use option there is a reduction in the tensile tension experienced by the band on the periphery of the control drum in the configuration of the prior art three-roller support stations, which relieves it and eliminates the problems of decentering, elongation or rupture.
  • the joining points of the strip (cold gluing or vulcanization or staples) which were vulnerable points are relieved of the high tensile tension, by the synchronized movement of all stations concave rollers, and no longer present a risk of rupture.
  • a third variant of use of the support stations according to the invention it is possible to group said stations into several sub-assemblies, composed of at least two rollers provided with members of the pulley-belt mechanical transmission or pinion. chain.
  • Each subassembly is provided with a control group, and all subassembly control groups of the support stations are synchronized in their rotational movement with the main control group installed on the head drum. It is then possible to distribute the power on several places of the conveyor.
  • the head control group is designated as master, and the other control groups of the support stations are slaves to it, the use of an electronic speed controller is necessary for the synchronization of the rotational movement.
  • each of said stations is individually equipped with a control group.
  • the control group of the head is always designated as master and the groups of the other stations are slaves to it (by the use of variable speed drives).
  • the various variants of use of the concave roller station have several advantages. In fact, eliminate, offsets, wear parts and failures, distribute the power on several locations of the conveyor and increase the duration of use of the belt and consequently the overall efficiency of the conveyor, improves the productivity of the conveyors. conveyors, the profitability of investments, and commercial competitiveness.
  • Figure 1 is a schematic representation of a three-roller support station known in the prior art.
  • Rollers (5) arranged in trapezoidal geometry as illustrated by FIG. 1, supports the band (1) deforms it into a deep trough; and are in free rotation and independent of each other.
  • the empty spaces (detail A) between the horizontal central roller and the inclined lateral rollers constitute a major drawback which creates the parasitic forces responsible for most of the offsets of the strip (1).
  • the same axes (6) of the rollers (5) are fixed on the flange (7) by flats which presents another vulnerability of the rollers (5) which increases the risk of falling rollers (5).
  • the ends of the steel poxes of the three rollers (5) are in contact with the strip (1), via the lower coating (4) in a pointwise manner, and under the effect of the weight of the strip (1) and the load it carries (not shown), exert a significant pressure on the lower coating (4) of the band (l) causing damage or premature wear.
  • the arrangement in trapezoidal geometry of the rollers (5) makes the band (1) undergo a brittle deformation at the empty spaces (Detail A) and exposes the upper covering (2), the lower covering (4) and the structure of the reinforcing (3) the band (1) at a severe lateral flexion which fatigues the band (1) and accelerates its wear.
  • the empty space (a) located between the horizontal central roller and the base of the support rack (7) is the location where the spilled material is housed, and the jamming of the rotation of the roll begins there. Inspection and cleaning operations are mainly related to this location.
  • the detail A (detail A) represents the empty spaces between the horizontal central roll and the inclined lateral rollers, and clearly illustrates the arrangement of the axes (6) of the rollers (5) as independent of each other in their rotational movement, and which can have according to this arrangement (detail A) speeds different from each other, which creates the parasitic forces responsible for offsets of the band (1).
  • the (detail A) clearly shows the broken fold of the strip (1), and the non-concave position which breaks the upper coating (2), the lower coating (4) and the reinforcement structure (3). !
  • Fig 2 is a schematic representation of a support station according to the invention.
  • the roller (8) whose surface describes a circular arc is obtained by the assembly of two cones (arranged back to back) by welding receives the band (1) and deforms it according to a
  • the flanges (lO in the form of reinforced discs by reinforcing ribs (1) are mounted on the concave roller (8) by welding.
  • the flanges (10) constitute an important support point to guarantee the support of all the compound weight of the strip (1) and its load and also constitute a point of support for the roller (8) on the traversing shaft ( 9) so that the arcuate shape responds well to the bending forces.
  • the through shaft (9) with a diameter of not more than 35 mm is joined to the flanges (10) also by welding.
  • FIG. 2 clearly shows that the strip (1) is deformed according to a concave geometry in an arc of a circle, and that the upper coating (2) and the lower coating (4) as well as the reinforcement structure (3) of the strip (1) ) are folded concavely and not brittle unlike the support station of the prior art illustrated in Figl (detail A).
  • the ends of the traversing shaft (9) with a maximum diameter of 35 mm protrude from the two flanged sides (10) and are able to be mounted on conventional rolling bearings (not shown).
  • the flanges (10) are in the form of disks reinforced on their inner faces by the ribs (11).
  • the shape of the pox (8) being concave and in one piece is well to receive a rubber coating (not shown).
  • the assembly consisting of the pox (8), the lateral flanges (10) and the traversing shaft (9) constitutes a one-piece piece operating for life on a conveyor, rotates with the advancement of the strip (1) without unbalance or flexion.
  • the support station according to the invention composed of the concave pox (8) of the flanges (10) and the through shaft (9) is able to be mounted on only two conventional rolling bearings, and has less resistance to the Advancement of the band (l), and therefore less electricity consumption because it has only two bearings, alqrs
  • FIG. 3 is a view of a set of support stations installed in the path of a conveyor and mounted on rolling bearings to form a concave curved bed, and are ready to receive an endless closed elastomeric strip. for the deform into a deep curvature.
  • the displacement of the strip rotates the support stations with less resistance, because they comprise only two rolling bearings per station compared to the support stations of the prior art which opposed more resistance because they had two bearings per roll or at the same time. total six bearings.
  • the construction of the conveyors becomes simple and will not require so much material compared to those made with support stations with three rollers.
  • Two rails (17) of any modular section and arranged parallel to one another, placed in the path of the conveyor, and reinforced by crosspieces (18) for receiving rolling bearings, are sufficient to build a conveyor. Huge savings are possible with the support stations according to the invention.
  • the said longitudinal members (17) are modular and facilitate both the transport and assembly of conveyors.
  • Figure 4 is a view of a conveyor equipped with support stations whose pomegranates (8) are concave arcuate; the traversing shafts (9) of said support stations are each provided with a mechanical transmission member (19) pulley or pinion, said transmission members are interconnected by a movement transfer member (20). belt or chain according to the configuration selected for the member (19).
  • the shaft (13) of the control drum (12) is equipped with a mechanical transmission member (21) compatible with those mounted on the traversing shafts (9) and connected with the traversing shaft (9) of the first station supported by the same transfer element of the movement (20) retained for the other support stations.
  • the shaft (13) of the control drum (12) drives in its rotational movement the traversing shaft (9) of the first support station.
  • the latter is equipped with a transmission member (19) and connected with the support station which follows it by the movement transfer member (20) Pentraine with it, and so on until the last support station.
  • the rotational movement of all the support stations facilitates the movement of the band and the load it carries.
  • the tension force experienced by the band on the control drum (12) inevitable because of the arrangement of the rollers of the support station of the prior art, which condemned the tape to transmit all along its strand the force necessary for its displacement, is it relieved by the simultaneous rotation of all the support stations according to the invention.
  • FIG. 5 is a view of a third variant of use of the concave roller support station according to the invention.
  • the concave roller support stations therein are interconnected by the mechanical transmission members (19) and the movement transfer elements (20) and are grouped together as a sub-assembly. Each subassembly is provided with a control group (22).
  • the head drum (12) is always driven by the control unit (14).
  • FIG. 6 is a schematic representation of the fourth variant of use of the concave roller support station.
  • All the concave roller stations (8) are each equipped individually with a control unit (22) whose power is adapted to the effort it has to provide, locally, to make advance the tape and its load (not shown).
  • the synchronization of all the control groups (22) is performed by electronic speed controller. Relieving the belt of the high tension it experienced at the control drum (12), distributing the power to several locations of the conveyor to relieve the head control group (14), increasing the speed of the belt and reducing the load by linear meter toutjen
  • the support station according to the invention is composed of pits (8) of the flanges (10) reinforced by the ribs (1) and the traversing shaft (9) with a diameter of 35 mm maximum. ..
  • the pox (8) is made by welding together two cones obtained by the spinning technique and arranged back to back to form a concave part describing a circular arc.
  • the flanges (10) in the form of discs receiving, by welding, on their inner faces the reinforcing ribs (11); said flanges (11) are welded to the edges of the concave pox (8).
  • the reinforcing ribs (11) arranged in a triangular arrangement and offset from each other by 120 ° are welded to the inner faces of the flanges (10)
  • the traversing shaft (9) with a diameter ranging from 20 to 35 mm depending on the width of the strip, mounted by welding on the flanges (10), and projecting on both sides of said flanges (10); is able to be mounted on rolling bearings placed on both sides of the conveyor frame to receive, deform in deep trough and advance an elastomeric conveyor belt.
  • said arcuate concave pox (8) is made of a technical polymer material (thermosetting or thermoplastic).
  • thermosetting or thermoplastic thermoplastic
  • the concave pox is obtained in one piece and in one piece. Nuts are to be inserted in the mold before casting, they will receive the side flanges (10) with bolts, the through shaft (9) with a diameter of 20 to 35 mm maximum, depending on the width of the band, remains to be welded with side flanges (10)
  • the support station thus obtained is a one-piece piece and is a permanent component of the conveyor intended to operate there for life to receive, deform in deep trough and advance an elastomeric strip.
  • One of the interesting advantages of the support station according to the invention is the increase in the safety of the maintenance personnel, since the said personnel are no longer called to change the rolls, sometimes performed while the conveyor is in the market. Also the risk of falling rollers is to be removed from the list of dangers conveyors, since the conventional rollers are removed and replaced by the single roller station whose pox is concave and mounted on rolling bearings without any risk of rupture or fall.
  • Another interesting advantage of the invention is that the jamming and locking of the rollers will no longer exist, since the support station is mounted on traditional bearings with effective sealing. The risk of falling rolls from tearing or breaking the web is eliminated.
  • Another interesting advantage of the invention is the reduction in the number of bearings contained in a support station. Indeed, the three-roller support station known in the prior art had six bearings, at the rate of two bearings per roll, while the device proposed by the invention has only two bearings, one rolling per step . This reduces the resistance to movement of the strip, and consequently the reduction of electrical energy necessary to advance the strip and the load it carries.
  • Another interesting advantage of the invention is the reduction of the costs of manufacturing the conveyors.
  • it is sufficient to assemble two beams, of any profile, in a modular way to cover the distance of the desired transport, to have them distant. to the desired width and parallel to each other, to reinforce them by sleepers, to climb them on feet to reach the desired height, and to place bearings with bearings of parts and others of said rails to receive the monobloc support stations with concave rollers whose pox is in an arc to support deforming trough and advance the band.
  • the conveyors will no longer require so many sheets or steel profiles compared to what was needed to fabricate the conveyor infrastructure to receive the prior art three-roller support stations.
  • Another interesting advantage of the invention is that station monitoring! concave rollers is now done visually and at safe distances for maintenance personnel, or remotely centrally on a desk that receives a motion signal through rotational sensors installed on one of the two ends of the traversing shaft of the concave roller support station.
  • the said remote monitoring which could not be carried out for the prior art three-roller support stations (only the head or foot drums could accept such remote monitoring), represents a very interesting advantage of the invention. Indeed, it is no longer necessary to cover long distances on conveyor gangways to inspect and monitor the running condition of the rollers as a routine and tedious and risky operation with the use of the device proposed by the manufacturer. invention.
  • Conveyors as essential infrastructures for the transport of bulk materials over long distances and at high flow rates become more available and more economical (manufacture and operation) with very high efficiency levels.
  • Another interesting advantage of the invention is the possibility of increasing the speed of the band. Also, the regulation of material flows from one conveyor to another, which was done by the differentiation of conveyor widths, is it possible, from now on, by the variation of the speed of the belt (electronic variator of the conveyor belt). frequency or by differentiation reduction ratio of speed reducers). This makes it possible to have standard conveyor widths, hence standard widths for the belts as well.

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  • Mechanical Engineering (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

The invention relates to a support station for a conveyor, said station being intended to receive a conveyor belt, deform the latter into a trough and cause same to advance. Composed of a single concave shell (8) that describes an arc of a circle, two side flanges (10) and a through-shaft (9), it is able to be mounted on roller bearings that are installed on either side of the conveyor. This function used to be ensured by support stations having three rollers arranged in a trapezoidal shape with a horizontal central roller and two inclined side rollers. The technical solution consisted in replacing the station having three rollers arranged in a trapezoidal geometry with a station having a single roller, the shell of which is concave, describing an arc of a circle. Composed of a single shell (8), two side flanges (10) and a through-shaft (9), the station is in one piece and is able to be mounted on standard bearings. The transport of bulk materials over long distances and at high rates is now more economical and more reliable.

Description

STATION SUPPORT A UN SEUL ROULEAU CONCAVE POUR LA MISE EN AUGE D'UNE BANDE TRANSPORTEUSE ET CONVOYEUR LA COMPORTANT  SUPPORT STATION HAS A SINGLE CONCAVE ROLL FOR THE LAYING OF A CONVEYOR BELT AND CONVEYOR HAVING THE SAME
DESCRIPTIF : DESCRIPTION:
La présente invention a pour objet un rouleau de parcours conçu avec une surface concave décrivant un arc de cercle pour recevoir, déformer en une auge profonde et faire avancer une bande transporteuse en élastomère dans le sens de marche d'un convoyeur. The present invention relates to a path roller designed with a concave surface describing an arc to receive, deform into a deep trough and advance an elastomeric conveyor belt in the direction of travel of a conveyor.
Elle concerne le domaine des transporteurs à bande en élastomère pour la manutention des matières brutes ou produits fini en vrac It concerns the field of elastomer belt conveyors for the handling of raw materials or finished products in bulk
Il est connu que le transport des matières de différents granulométries telles que les sables, les gravettes, les minerais ou tout autres produits homogènes ou mélangés d'un point de chargement vers un point de déchargement distants de quelques mètres ou de plusieurs kilomètres se fait par l'utilisation des transporteurs à bande en élastomère. It is known that the transport of materials of different particle sizes such as sands, gravels, ores or any other homogeneous or mixed products from a loading point to an unloading point at a distance of a few meters or several kilometers is made by the use of elastomer belt conveyors.
La technique des transporteurs à bande également appelés convoyeurs à bande est très utilisée dans l'industrie, les mines, les cimenteries, les carrières et l'agriculture. The technique of belt conveyors also called belt conveyors is widely used in industry, mines, cement plants, quarries and agriculture.
Elle représente le moyen le plus économique pour la manutention des matières sur de longues distances et avec de grands débits. It is the most economical way of handling materials over long distances and at high flow rates.
Les convoyeurs à bande ont connu à travers leur histoire plusieurs améliorations qui ont visé à la fois l'augmentation des débits, la correction des problèmes de fonctionnement et l'amélioration de la sécurité du personnel de la production et celui de la maintenance. Belt conveyors have seen a number of improvements throughout their history that have focused on increasing throughput, correcting operational problems and improving the safety of production and maintenance personnel.
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Le principe de fonctionnement d'un convoyeur est simple. Il consiste à faire avancer, tout le long de la trajectoire voulu pour déplacer une matière d'un point de chargement vers un point de déchargement, une bande en élastomère tenue tendue par des tambours d'extrémité placés en tête et au pied du convoyeur. Des stations supports, comportant 3 rouleaux chacune, sont disposées et à intervalle régulier le long de infrastructure du convoyeur. Elles ont pour rôle de soutenir (recevoir et déformer en auge profonde) et de faire avancer une bande en élastomère ainsi que la charge qu'elle contient. Selon ce principe de fonctionnement la bande remplit alors un double rôle : contenir le produit à transporter ET transmettre tout le long de son brin la force nécessaire à son déplacement. Les stations supports sont montées sur des supports métalliques appelés chevalets, et y sont disposés 3 rouleaux selon une configuration trapézoïdale. En effet, et c'est l'une des plus importantes améliorations qu'ont connu les convoyeurs pour augmenter leurs débits : les concepteurs ont pensé à augmenter la contenance de la bande pour augmenter le débit des convoyeurs. Aussi pour augmenter la contenance de la bande fallait-il nécessairement la déformer en une auge profonde avec des angles allant de 20 à 45 degrés pour les largeurs des bandes allant de 400 à 2200 mm. The operating principle of a conveyor is simple. It consists in advancing, throughout the path required to move a material from a loading point to an unloading point, an elastomeric strip held taut by end drums placed at the top and bottom of the conveyor. Support stations, having 3 rolls each, are arranged at regular intervals along the conveyor infrastructure. Their role is to support (receive and deform in deep trough) and advance an elastomeric band and the load it contains. According to this principle of operation the band then fulfills a dual role: to contain the product to be transported AND to transmit all along its strand the force necessary for its displacement. The support stations are mounted on metal supports called trestles, and are arranged 3 rollers in a trapezoidal configuration. Indeed, and this is one of the most important improvements that conveyors have experienced to increase their flow: the designers have thought to increase the capacity of the band to increase the flow of the conveyors. Also, to increase the capacity of the belt it was necessary to deform it into a deep trough with angles ranging from 20 to 45 degrees for band widths ranging from 400 to 2200 mm.
Aussi avec cette logique d'augmentation des débits, les stations supports ont-elles subits une profonde amélioration. Il s'agissait de placer un rouleau horizontal au centre de la station, et deux rouleaux latéraux inclinés placés de parts et d'autres du dit rouleau central. Car dans la conception antérieure à cette amélioration les stations supports ne comportaient que deux rouleaux disposés en V, mais qui présentaient d'autres problématiques telles que la limite de la capacité de contenance et la cassure de la structure de renforcement de la bande à cause de la faiblesse du rayon de courbure. La configuration ainsi obtenue représente une géométrie trapézoïdale qui a permis à la fois de mieux soutenir la bande au centre de la largeur du convoyeur, et aussi d'augmenter contenance de la bande qui transporte plus de matière au mètre linéaire. 1 Also with this logic of increase of flows, the support stations have undergone a deep improvement. It was a question of placing a horizontal roller in the center of the station, and two inclined lateral rollers placed on both sides of the said central roll. Because in the design prior to this improvement the support stations had only two rollers arranged in V, but which had other problems such as the limit of the capacity of containment and the break of the reinforcement structure of the band because of the weakness of the radius of curvature. The configuration thus obtained represents a trapezoidal geometry that has allowed both to better support the band at the center of the width of the conveyor, and also to increase the capacity of the band which carries more material per linear meter. 1
Mais la disposition des rouleaux en une forme trapézoïdale est trop contraignante pour la bande èn élastomère. En effet, cette dispositions en une forme trapézoïdale bloque l'avancement de la bande devenue plus chargée, et crée des forces parasites qui provoquent le désalignement ou le déport de la bande. Aussi les matières transportées se déversent-elles dans les alentours du convoyeur provoquant le blocage et le coincement des rouleaux. Le dit blocage de la bande à l'intérieur des stations supports,! et coincement des rouleaux sont les sources majeures des principaux dysfonctionnements qui entachent encore l'utilisation des convoyeurs. But the arrangement of the rollers in a trapezoidal shape is too restrictive for the elastomeric strip. Indeed, this provision in a trapezoidal shape blocks the advancement of the band become more loaded, and creates parasitic forces that cause the misalignment or the offset of the band. Also the transported materials are poured into the vicinity of the conveyor causing jamming and jamming rollers. The said blocking of the tape inside the support stations! and jamming of the rollers are the major sources of the main malfunctions that still taint the use of conveyors.
D'où des opérations longues et fastidieuses pour le nettoyage des matières déversées et/ou le remplacement des rouleaux avariés. Les arrêts non programmés provoqués par ces avaries contribuent-ils aussi à la dégradation de la productivité et la hausse des cOuts d'exploitation des convoyeurs. Ceci sans oublier les accidents blessants ou mortels bue peut causer la chute des rouleaux ou la rupture de la bande. Par ailleurs, la conception des stations supports à trois rouleaux disposés selon une configuration trapézoïdale, la plus utilisée sur les convoyeurs, fait que la bande remplit une double fonction : En plus de contenir le produit à transporter, elle doit assurer la transmission, tout le long de son brin, de l'effort de traction appliqué au niveau du tambour de commande. Ce qui fait que la bande, et tenant compte de sa contenance importante en produits à transporter et de son poids, doit avoir une résistance importante aux efforts de tractions qu'elle subit au niveau du tambour de commande. Or, une bande avec une forte résistance est forcement trop rigide pour être déformer en auge profonde à l'intérieur des stations supports. C'est la raison principale des difficultés que rencontre la bande en se confinant à l'intérieur des stations support à trois rouleaux disposés selon une configuration trapézoïdale. La position contraignante de pliage aiguë et non concave, que doit subir la bande à l'intérieur des stations supports, fatigue et accélère la détérioration de sa structure de renforcement et de ses revêtements en caoutchouc. En plus la conception des stations supports à trois rouleaux n'offre alors aucune possibilité de motorisation des dites stations, et rend toutes les améliorations pour augmenter le débit et stabiliser la bande concentrer sur la forme géométrique de la disposition des rouleaux ET sur la robustesse de la bande. Ce' qui ne permet pas d'éliminer de manière définitive les problèmes des déports de la bande, ceux des sollicitudes énergétiques exagérées dues au poids et à la rigidité de la bande, et ceux liés à la difficulté à la faire avancer à l'intérieur des stations support à trois rouleaux. Hence long and tedious operations for the cleaning of spilled material and / or the replacement of damaged rollers. The unplanned outages caused by these accidents also contribute to the degradation of productivity and the increase in the operating costs of conveyors. This not to mention the injury or fatal accidents that can cause the rollers to fall or break the tape. Moreover, the design of the three-roller support stations arranged in a trapezoidal configuration, the most used on the conveyors, makes that the band fulfills a dual function: In addition to containing the product to be transported, it must ensure the transmission, all the along its strand, the tensile force applied to the control drum. This means that the belt, taking into account its large content of products to be transported and its weight, must have a significant resistance to the pulling forces that it undergoes at the control drum. However, a band with high strength is necessarily too rigid to be deformed deep trough inside the support stations. This is the main reason for the difficulties encountered by the band by confining itself inside the three-roller support stations arranged in a trapezoidal configuration. The binding position of acute and non-concave folding, which must undergo the tape inside the support stations, fatigue and accelerates the deterioration of its reinforcing structure and its rubber coatings. In addition the design of the three-roller support stations then offers no possibility of motorization of said stations, and makes all improvements to increase the flow and stabilize the band focus on the geometric shape of the arrangement of the rollers AND on the robustness of the band. This does not make it possible to eliminate definitively the problems of the offsets of the band, those of the exaggerated energetic demands due to the weight and the rigidity of the band, and those related to the difficulty to advance it inside support stations with three rollers.
Cette situation est inhérente à la conception des stations supports à 3 rouleaux avec une configuration trapézoïdale qui, bien qu'elle garde le mérite d'avoir augmenté les débits des convoyeurs, elle constitue encore la principale cause des forces parasites qui provoquent les désalignements et les déports eux-mêmes responsables des blocages et des coincements des rouleaux. This situation is inherent in the design of the 3-reel support stations with a trapezoidal configuration which, although it still has the merit of having increased the conveyor flow rates, is still the main cause of the parasitic forces which cause the misalignments and misalignments. offsets themselves responsible for jamming and jamming rollers.
Par ailleurs, le rouleau de parcours conventionnel étant réalisé par l'assemblage d'une vérole cylindrique et d'un axe traversant d'un diamètre de 20 à 35 mm Ipar l'intermédiaire des boîtiers à roulements à billes munis de dispositifs d'étancheité présente, quant a lui, une autre source de vulnérabilité. En effet, l'infiltration de l'eau et/ou de la poussière provoque l'avarie des roulements qui ne tournent plus, ce qui bloque la rotation de la vérole créant ainsi une résistance supplémentaire à l'avancement de la bande et par voie de conséquence une augmentation des sollicitudes énergétiques, des surchauffes de la bande et surtout le percement de la dite vérole cylindrique qui devient tranchante et déchire la bande. D'autres problématiques plus graves peuvent également survenir suite au coincement des véroles, il s'agit notamment de la chute des rouleaux qui peut avoir des conséquences graves pour la sécurité du personnel . Furthermore, the conventional roller is made by assembling a cylindrical spindle and a through shaft with a diameter of 20 to 35 mm I through the ball bearing housings provided with sealing devices presents, for its part, another source of vulnerability. In fact, the infiltration of water and / or dust causes damage to bearings that no longer rotate, which blocks the rotation of the pox thus creating additional resistance to progress the band and consequently an increase in energy demands, overheating of the band and especially the piercing of the so-called cylindrical pox that becomes sharp and tears the band. Other more serious problems can also occur following the jamming of the pox, it is in particular the fall of the rollers which can have serious consequences for the safety of the personnel.
Aussi les convoyeurs, et malgré leur avantage économique en tant qu'infrastructure de convoyage des matières à grands débits et sur de longues distances conservent-ils toujours des inconvénients majeurs impactant à la fois les coûts d'exploitation et la sécurité du personnel de la production et celui de la maintenance. Ceci est principalement dû à la conception des stations à trois rouleaux disposés en une forme trapézoïdale Also conveyors, and despite their economic advantage as a conveyance infrastructure for materials with high flow rates and over long distances still retain major drawbacks impacting both the operating costs and the safety of production personnel and that of maintenance. This is mainly due to the design of three-roller stations arranged in a trapezoidal shape
En effet, la forme trapézoïdale que doit prendre la bande en se confinant dans les dits stations est trop contraignante pour elle, et la dite bande doit se déformer en auge selon une configuration cassante et non pas concave ce qui fatigue sa structure de renforcement et ses revêtements aussi bien supérieur qu'inférieur. Indeed, the trapezoidal shape that must take the band confining itself in the said stations is too restrictive for it, and said band must deform into a trough in a brittle configuration and not concave which fatigues its reinforcement structure and its coatings both superior and inferior.
L'indépendance de la rotation des rouleaux d'une station, les un par rapport aux autres, est responsable quant à elle des forces parasites qui provoquent le désalignement de la bande et les déversements des matières, elles mêmes responsables des coincements des rouleaux. En effet, cette indépendance de la rotation des rouleaux et avec la configuration trapézoïdale rendent les forces de traction de la bande convergentes vers le centre du convoyeur, et tout blocage de la rotation, d'un ou de plusieurs rouleaux d'une station rouleau ou de plusieurs station, fait déporter la bande vers l'extérieur de l'axe de la trajectoire du convoyeur .Ce qui provoque les arrêts non programmés du convoyeurs ou les déversements des produits avec les conséquences exposées en supfa. Plusieurs solutions ont été décrites dans l'état de la technique pour rattraper les lacunes qui subsistent encore, et qui entachent de manière négative le bon fonctionnement des convoyeurs The independence of the rotation of the rollers of a station, relative to each other, is responsible for it parasitic forces that cause the misalignment of the band and spills materials, themselves responsible for jamming rollers. Indeed, this independence of the rotation of the rollers and with the trapezoidal configuration makes the tensile forces of the belt converging towards the center of the conveyor, and any blocking of the rotation, of one or more rollers of a roll station or from several stations, has the band moved out of the axis of the trajectory of the conveyor. This causes unscheduled stops of the conveyors or spills of the products with the consequences exposed in supfa. Several solutions have been described in the state of the art to make up for the gaps which still remain, and which negatively taint the smooth operation of the conveyors.
Il en est ainsi du document CN 102502204 qui décrit une station support qui présente une partie centrale horizontale, et des bords latéraux coniques et un arbre débordant des deux côtés de la station pour un montage sur des paliers à roulements. Cette solution peut s'avérer inefficace pour des angles d'inclinaisons de 45 degrés, car avec ce niveau d'inclinaison il sera très difficile de faire avancer la bande et la charge qu'elle contient. Les stations supports de l'art antérieur composées de trois rouleaux indépendants dans leurs mouvement de rotation permettaient des déformations allant de 20 à 45° par rapport au plan horizontal et pour des largeurs de la bande allant de 400 mm à 2200 mm et avec des diamètres des axes traversant allant seulement de 20 à 35 mm, justement parce qu'il y avait la liberté du mouvement des rouleaux les uns par rapports aux autres. Et c'est là ou réside le grand avantage technique des stations supports de l'art antérieur : Un contact tangentiel avec la bande et une indépendance de la rotation par rapport aux autres rouleaux de la même station. This is the case of CN 102502204 which describes a support station which has a horizontal central portion, and conical side edges and a shaft projecting on both sides of the station for mounting on rolling bearings. This solution may be ineffective for 45-degree inclination angles, because with this level of inclination it will be very difficult to advance the belt and the load it contains. The support stations of the prior art composed of three independent rollers in their rotational movement allowed deformations ranging from 20 to 45 ° with respect to the horizontal plane and for widths of the band ranging from 400 mm to 2200 mm and with diameters traversing axes ranging from only 20 to 35 mm, precisely because there was freedom of movement of the rollers relative to each other. And this is where lies the great technical advantage of the support stations of the prior art: tangential contact with the band and an independence of the rotation compared to other rollers of the same station.
Or, la solution de la station décrite dans le document CN 102502204 ne peut pas offrir des inclinaisons importantes jusqu'à 45° sans pour autant provoquer un blocage de; la bande à l'intérieur de la dite station. However, the solution of the station described in the document CN 102502204 can not offer significant inclinations up to 45 ° without causing a blockage of; the band inside the said station.
Un autre inconvénient majeur apparaît avec la station décrite dans le document CN 102502204. Il s'agit de la flexion que doit subir l'arbre débordant des deux côtés de la station. En effet, ce problème n'existait pas dans les stations supports à 3 rouleaux disposés selon une forme trapézoïdale. Car il y a une répartition bien équilibrée des forces radiales par le fait que, chaque rouleau est fixé dans sa position avec son propre arbre traversant dont la longueur est courte par rapport à la largeur de la bande (3 arbres pour chaque largeur de la bande) ,et que le diamètre du dit arbre varie entre 25 et 35 mm seulement. Ceci garantie une rigidité suffisante de la station et élimine toutes les formes des flexions radiales que pouvait subir la dite station. Another major disadvantage appears with the station described in CN 102502204. This is the bending that must undergo the shaft overflowing on both sides of the station. Indeed, this problem did not exist in the support stations with 3 rollers arranged in a trapezoidal shape. Because there is a well-balanced distribution of radial forces by the fact that each roller is fixed in its position with its own traversing shaft whose length is short compared to the width of the strip (3 trees for each width of the strip ), and that the diameter of said shaft varies between 25 and 35 mm only. This ensures sufficient rigidity of the station and eliminates all forms of radial bending that could suffer the said station.
Or la solution décrite dans le document CN 102502204 en présentant un arbre horizontal à fixer sur des paliers placés sur les bords du convoyeur, fait subir à la station Now the solution described in the document CN 102502204 by having a horizontal shaft to be fixed on bearings placed on the edges of the conveyor, makes the station
i une forte flexion due aussi bien à la charge qu'au mouvement de la rotation du rouleau sur lui même. Pour pallier à cet inconvénient, le document préconise un diamètre important de l'arbre traversant. Or, augmenter le diamètre pour éviter les flexions revient à augmenter le poids de la station ce qui est synonyme d'une grande consommation de l'énergie électrique. Aussi un arbre débordant d'un grand diamètre veut dire l'utilisation de paliers d'un grand diamètre, et des roulements d'un diamètre important ce qui peut générer des coûts supplémentaires aussi bien au niveau j de l'investissement et de l'exploitation que ceux de la maintenance. Enfin cette solution avec les problèmes de la flexion et d'un arbre traversant d'un grand diamètre semble' ne pas être très pratique sur des convoyeurs contenant plusieurs centaines voir de milliers de stations supports. En effet, il suffît d'imaginer le poids total des stations à faire entraîner par la bande et les retomber énergétiques que cela engendre, et de calculer le temps nécessaire et la quantité du lubrifiant pour réaliser un entretien normal des paliers (deux par station support) pour se rendre compte de la difficulté à utiliser cette solution. i a strong bending due to both the load and the movement of the rotation of the roller itself. To overcome this drawback, the document recommends a large diameter of the traversing shaft. However, increasing the diameter to avoid bending is to increase the weight of the station which is synonymous with a large consumption of electrical energy. Also a tree overflowing with a large diameter means the use of bearings of a large diameter, and bearings of large diameter which can generate additional costs both at the level of investment and operation than those of maintenance. Finally, this solution with the problems of bending and a traversing shaft of large diameter does not seem to be very practical on conveyors containing several hundred or even thousands of support stations. Indeed, it is sufficient to imagine the total weight of the stations to be carried by the band and the energy fall that it generates, and to calculate the necessary time and quantity of the lubricant to perform a normal maintenance of the bearings (two per support station ) to realize how difficult it is to use this solution.
Le document CN 28953328 décrit une station composée de plusieurs rouleaux dont les surfaces sont concaves destinés à fermer une bande transporteuse tubulaire. A part la vérole qui est concave le rouleau décrit dans le document CN28953328 garde le même principe que le rouleau conventionnel utilisé dans les stations supports à trois rouleaux disposés selon une forme trapézoïdale à savoir ; une fixation par méplat et des boîtiers à roulements munis de dispositifs d'étanchéité. CN 28953328 discloses a station composed of a plurality of rollers having concave surfaces for closing a tubular conveyor belt. Apart from the pox which is concave, the roller described in document CN28953328 retains the same principle as the conventional roller used in the three-roller support stations arranged in a trapezoidal shape, namely; a flattened attachment and bearing housings provided with sealing devices.
Ceci maintient la solution préconisée par le document CN28953328 toujours au même niveau de vulnérabilité que celle des rouleaux conventionnels quant à l'infiltration des eaux et des poussières et les conséquences graves aussi bien sur la productivité, manifestée par les arrêts non programmés (avaries des rouleaux et détérioration de la bande) que celles de la sécurité, manifestées par les risques des chutes des rouleaux bloqués. Par ailleurs, et comme mentionné dans le document CN28953328, la station support qui y décrite semble n'être efficace qu'en ayant une longueur d'arbre réduite pour une application pour fermer une bande tubulaire. En effet, et pour des largeurs au- delà de 500 mm, et étant donnée que l'arbre traversant ne tourne pas et que l'appui de la force radiale se trouve localisé au niveau des pistes des roulements logées dans les boîtiers latéraux et au niveau des extrémités de l'arbre fixé par méplat, il risque d'y avoir un phénomène de balourd et de balancement vertical, et la forme concave de: la vérole ne peut pas assurer une stabilité du mouvement de la rotation. This maintains the solution recommended by document CN28953328 always at the same level of vulnerability as that of conventional rolls in terms of infiltration of water and dust and the serious consequences as well on the productivity, manifested by the unplanned stops (roller damage and deterioration of the band) than those of safety, manifested by the risks of falling rolls blocked. On the other hand, and as mentioned in CN28953328, the support station therein described appears to be effective only in having a reduced tree length for an application to close a tubular web. Indeed, and for widths beyond 500 mm, and given that the traversing shaft does not rotate and the support of the radial force is located at the tracks of the bearings housed in the side housings and at the level of the ends of the shaft fixed by flat, there may be a phenomenon of unbalance and vertical swing, and the concave shape of : the pox can not ensure stability of the movement of the rotation.
La présente invention vise à pallier aux inconvénients et aux lacunes qui subsistent encore dans l'état de la technique. Elle propose une station support composée d'un seul The present invention aims to overcome the disadvantages and gaps that still exist in the state of the art. It proposes a support station composed of a single
i rouleau dont la surface est concave décrivant un arc de cercle, de deux flasques latéraux montés de part et d'autre de la dite vérole, et d'un arbre traversant d'un diamètre ne dépassant pas 35 mm apte à être monté sur des paliers à roulements placés sur les bords du châssis du convoyeur. Les éléments constitutifs de la nouvelle station support en l'occurrence la vérole concave, les deux flasques latéraux et l'arbre traversant dont le diamètre ne dépasse pas 35 mm sont assemblés par soudure et constituent une pièce monobloc apte à être montée sur des paliers standards placés de part et d'autres du châssis du convoyeur pour y recevoir, déformer en auge profonde et faire avancer la bande transporteuse en élastomère et la charge qu'elle contient. a roll whose surface is concave describing an arc of a circle, two lateral flanges mounted on either side of said pox, and a through shaft with a diameter of not more than 35 mm suitable for being mounted on rolling bearings placed on the edges of the conveyor frame. The constituent elements of the new support station, in this case the concave pomegranate, the two lateral flanges and the traversing shaft whose diameter does not exceed 35 mm, are assembled by welding and constitute a single piece capable of being mounted on standard bearings. placed on either side of the conveyor frame to receive, distort deep trough and advance the elastomeric conveyor belt and the load it contains.
La nouvelle station support selon l'invention constitue une pièce permanente du convoyeur, et présente suffisamment de résistance à la flexion grâce à la forme en arc de cercle de la vérole tout en maintenant le diamètre de l'arbre traversant dans la limite de 35 mm maximum. The new support station according to the invention constitutes a permanent part of the conveyor, and has enough flexural strength thanks to the arcuate shape of the pox while maintaining the diameter of the through shaft within the limit of 35 mm. maximum.
Par rapport au document CN102502204 la nouvelle station support selon l'invention vise à éliminer le problème de la flexion tout en gardant le diamètre de l'arbre traversant dans les dimensions standards entre 20 et 35 mm et cela proportionnellement à la longueur de la vérole. Cela est possible avec la forme concave de la vérole qui présente l'avantage technique de mieux résister aux forces radiales et d'éliminer, grâce à la forme en arc de cercle de la vérole, toutes les forces radiales qui peuvent faire fléchir l'arbre traversant. Cela permet alors de garder le diamètre de l'arbre traversant dans les dimensions standards (entre 20 et 35 mm) ce qui n' impacte pas le poids total d la station, et permet l'utilisation des paliers à roulements standards étanches et graissés à vie, ce qui réduit considérablement les coûts d'investissement et ceux liés à la maintenance. Car il n'est pas nécessaire d'entretenir de paliers standards à roulements étanches et graissés à vie Compared to CN102502204 the new support station according to the invention aims to eliminate the problem of bending while keeping the diameter of the traversing shaft in the standard dimensions between 20 and 35 mm and that in proportion to the length of the pox. This is possible with the concave shape of the pox which has the technical advantage of better resisting radial forces and eliminating, thanks to the arcuate shape of the pox, all the radial forces that can bend the tree crossing. This then makes it possible to keep the diameter of the traversing shaft in the standard dimensions (between 20 and 35 mm), which does not impact the total weight of the station, and allows the use of standard bearings sealed and greased to life, which significantly reduces investment and maintenance costs. Because it is not necessary to maintain standard bearings with sealed bearings and greased for life
La forme concave de la vérole selon l'invention pallie aux inconvénients laissés par! le document CN 102502204 en éliminant les problèmes de la flexion de l'arbre grâce à sa forme en arc de cercle qui présente une meilleure résistance aux forces radiales par rapport à la solution préconisée par le document CN 102502204 qui propose un rouleau avec une partie centrale horizontale et des bords latéraux coniques .Cette même résistance accrue de la vérole, selon l'invention, et grâce à la forme en arc de cercle The concave shape of the pox according to the invention overcomes the disadvantages left by! the document CN 102502204 eliminating the problems of bending the shaft with its arcuate shape which has a better resistance to radial forces compared to the solution recommended by the document CN 102502204 which proposes a roll with a central portion horizontal and conical side edges .This same increased resistance of the pox, according to the invention, and thanks to the shape in an arc
! i permet l'utilisation d'un arbre traversant d'un diamètre ne dépassant pas 35 mm, alors que pour le document CN102502204 l'arbre traversant doit d'un diamètre beaucoup plus grands justement pour résister à la flexion d'où sa vulnérabilité aussi bien technique (grand diamètre de l'arbre donc plus de poids et plus d'énergie électrique) qu'économique (arbre d'un grand diamètre implique des paliers avec des roulements1 de grands diamètres et des opérations de la maintenance). En plus de cet énorme avantage technique, la nouvelle station selon l'invention réduit considérablement les coûts d'investissements et offre plus d'avantages économiques liés à l'augmentation de la productivité (moins d'arrêts des convoyeurs) et à l'amélioration de la sécurité du personnel de la maintenance (pas chute de rouleaux). ! i allows the use of a traversing shaft with a diameter of not more than 35 mm, whereas for the document CN102502204 the traversing shaft must have a much larger diameter precisely to withstand flexion, hence its vulnerability too good technical (large diameter of the shaft therefore more weight and more electrical energy) than economic (large diameter shaft involves bearings with bearings 1 large diameters and maintenance operations). In addition to this enormous technical advantage, the new station according to the invention considerably reduces the investment costs and offers more economic benefits related to the increase in productivity (fewer conveyor stops) and the improvement safety of maintenance personnel (not falling rollers).
Par rapport au document CN28953328, la présente invention présente l'avantage technique d'extemaliser les éléments roulants, à savoir les paliers à roulement, à l'extérieur de la vérole. Compared to CN28953328, the present invention has the technical advantage of extemalizing the rolling elements, namely rolling bearings, outside the pox.
En effet, selon l'invention l'arbre traversant ne dépassant pas 35 mm est à placer sur des paliers installés de part et d'autres du châssis du convoyeur, ce qui élimine; la vulnérabilité des étanchéités, et celle de la fixation et rend plus stable le mouvement de la rotation généré par le passage de la bande. Il est clair que les étanchéités des roulements des paliers standards présentent une meilleure résistance aux infiltrations des eaux et des poussières en comparaison avec les étanchéités des boîtiers à roulements montés à l'intérieur de la vérole tel que préconisé par le document CN28953328. Indeed, according to the invention the shaft passing through not exceeding 35 mm is to be placed on bearings installed on either side of the conveyor frame, which eliminates; the vulnerability of seals, and that of fixing and makes more stable the movement of the rotation generated by the passage of the band. It is clear that the sealing of bearings of standard bearings have a better resistance to infiltration of water and dust in comparison with the sealing of the bearing housings mounted inside the pox as recommended by CN28953328.
Il est également clair que le montage de l'arbre traversant sur des paliers à roulements, selon l'invention, assure une meilleure stabilité de l'arbre traversant, et élimine par vois de conséquence, tout les phénomènes de balourd qui risquent d'apparaître pour les longueurs d'arbre au-delà de 500 mm, ainsi que tout éventuel risque de chute de la station comparativement à la fixation par méplat préconisée par le document CN28953328. ; It is also clear that the mounting of the traversing shaft on rolling bearings, according to the invention, ensures a better stability of the traversing shaft, and eliminates by any means, all the unbalance phenomena that may appear for shaft lengths beyond 500 mm, as well as any possible risk of falling from the station compared to the flat fastening recommended by CN28953328. ;
La présente invention vise à pallier ces inconvénients. D'abord elle propose l'élimination des stations supports conventionnelles connues dans l'état de la technique en supprimant les rouleaux à rotation libre et indépendants les uns des autres. Elle vise également à offrir la possibilité de placer des groupes de commande à différents endroits du convoyeur. j The present invention aims to overcome these disadvantages. First, it proposes the elimination of conventional support stations known in the state of the art by eliminating freely rotating rollers and independent of each other. It also aims to provide the possibility of placing control groups at different locations of the conveyor. j
La présente invention propose un dispositif pour recevoir, déformer la bande d*un convoyeur en auge profonde et faciliter son déplacement, caractérisé en ce qù'il comporte un seul rouleau dont la vérole est concave décrivant un arc de cercle, deux flasques latéraux renforcés par des nervures et montés de parts et d'autres de la dite vérole, et un arbre traversant, d'un diamètre ne dépassant pas 35 mm, apte à être monté sur des paliers traditionnels à roulements placés sur les bords du châssis du convoyeur. La vérole concave décrivant un arc de cercle est obtenue par l'assemblage par soudure de deux cônes façonnés par la technique de repoussage et disposés dos à dos. The present invention provides a device for receiving, deforming the belt of a deep trough conveyor and facilitating its movement, characterized in that it has a single roller with a concave pore describing a circular arc, two side plates reinforced by ribs and mounted on both sides of the said pox, and a traversing shaft with a diameter not exceeding 35 mm, capable of being mounted on conventional bearings with bearings placed on the edges of the conveyor frame. The concave pox describing a circular arc is obtained by the assembly by welding of two cones shaped by the embossing technique and arranged back to back.
Les flasques latéraux en forme de disque comportent des nervures de renforcement sur leurs faces intérieures, et sont montés par soudure sur les bords de la vérole concave. The disc-shaped lateral flanges have reinforcing ribs on their inner faces, and are welded to the edges of the concave pox.
L'arbre traversant est fixé sur les flasques par soudure. Débordant des deux côtés de la vérole il est destiné à être montés sur de paliers conventionnels à roulements. The traversing shaft is fixed on the flanges by welding. Overflowing on both sides of the pox it is intended to be mounted on conventional bearing bearings.
Dans un autre mode de réalisation de l'invention, la vérole concave en arc de cercle est fabriquée à partir de matériau polymère technique thermodurcissable (ou thermoplastique) renforcé avec une charge telle que la fibre de verre par exemple. Par la technique de centrifugation ou celle de la coulée par gravité la vérole ou par procédé injection ; la dite vérole concave est obtenue entière et d'un seul tenant. Des écrous sont à insérer dans le moule, avant la coulée, sur le pourtour des bords de la vérole pour recevoir les flasques qui, suivant cette variante, sont joints à la vérole par boulons. L'arbre traversant d'un diamètre de 35 mm maximum est assemblé avec les flasques latéraux par soudure. Le dispositif ainsi obtenu, selon l'un des deux modes de réalisation de l'invention, est une pièce monobloc apte à être montée sur des paliers à roulements traditionnels placés de parts et d'autres du convoyeur, et qui tourne quand la bande avance. In another embodiment of the invention, the arcuate concave pox is made from thermosetting (or thermoplastic) technical polymer material reinforced with a filler such as fiberglass, for example. By the technique of centrifugation or that of the casting by gravity the pox or by process injection; the so-called concave pox is obtained whole and in one piece. Nuts are to be inserted in the mold, before casting, around the edges of the pox to receive the flanges which, according to this variant, are joined to the pox by bolts. The traversing shaft with a maximum diameter of 35 mm is assembled with the side flanges by welding. The device thus obtained, according to one of the two embodiments of the invention, is a one-piece piece adapted to be mounted on conventional rolling bearings placed on both sides of the conveyor, and which turns when the tape is moving forward. .
i Selon l'invention, la station support caractérisée en ce qu'elle comporte un seul rouleau concave, deux flasques latéraux et un arbre traversant d'un diamètre ne dépassant pas! 35 mm, reçoit la bande et la déforme en auge profonde suivant une géométrie en arq de cercle, et non pas cassante comparée à celle des stations à trois rouleaux connue dans l'art antérieur qui étaient disposés suivant une géométrie trapézoïdale. Le dispositif selon l'invention obtenu par l'assemblage de deux cônes soudés dos à dosi et comprenant deux flasques et un arbre traversant le tout scellé par soudure, ou| en variante par la centrifugation ou la coulée ou par l'injection de polymère pour! la confection de la vérole concave qui reçoit la flasques par boulons (selon cette variante) alors que les dits flasques restent soudés avec l'arbre traversant (pour les deux variantes de réalisation); est apte à être monté sur des paliers à roulements installés de parts et d'autres du convoyeur. According to the invention, the support station characterized in that it comprises a single concave roller, two lateral flanges and a traversing shaft of a diameter not exceeding! 35 mm, receives the band and deforms it deep trough a geometry circle arq, and not brittle compared to that of the three-reel stations known in the prior art which were arranged in a trapezoidal geometry. The device according to the invention obtained by assembling two cones welded back to back and comprising two flanges and a shaft traversing the whole sealed by welding, or | in alternatively by centrifugation or casting or by injection of polymer for making the concave pox that receives the flanges by bolts (according to this variant) while said flanges remain welded with the shaft (for both variants); is able to be mounted on rolling bearings installed on both sides of the conveyor.
Le dispositif selon l'invention est particulièrement destiné à être placé, en quantité suffisante, sur un convoyeur pour former un lit concave apte à recevoir et déformer une bande transporteuse caractérisé en ce que la bande garde en permanence un contact tangentiel avec toute la surface du rouleau concave. Selon l'invention le pliage de la structure interne de renforcement de la bande est atténué, et la flexion latérale grave que subissait la bande dans les stations de l'art antérieur est éliminée. The device according to the invention is particularly intended to be placed, in sufficient quantity, on a conveyor to form a concave bed adapted to receive and deform a conveyor belt, characterized in that the strip permanently maintains tangential contact with the entire surface of the conveyor belt. concave roll. According to the invention, the bending of the internal reinforcing structure of the strip is attenuated, and the severe lateral bending experienced by the strip in the stations of the prior art is eliminated.
Composé de plusieurs pièces, une vérole concave suffisamment rigide pour contre carrer les flexions dues à la charge radiale et au mouvement de rotation grâce à la forme en arc de cercle, deux flasques latéraux et un arbre traversant d'un diamètre de 35 mm maximum, le dispositif est monobloc caractérisé en ce que l'ensemble de la surface concave tourne en même temps avec l'avancée de la bande, ceci élimine les forces parasites que subissait la bande au niveau des espaces vides situés entre le rouleau central horizontal et les rouleaux inclinés des stations de l'art antérieur. Selon l'invention, les problèmes de décentrage de la bande causés par les espaces vides situés entre les rouleaux conventionnels et la différence de la vitesse des rouleaux Consisting of several parts, a concave pox sufficiently rigid to counter bending due to the radial load and the rotational movement thanks to the arcuate shape, two lateral flanges and a traversing shaft with a diameter of 35 mm maximum, the device is monoblock characterized in that the entire concave surface rotates at the same time with the advance of the strip, this eliminates the parasitic forces that the band underwent at the empty spaces between the horizontal central roller and the rollers inclined stations of the prior art. According to the invention, the problems of off-centering of the web caused by the empty spaces between the conventional rolls and the difference in the speed of the rollers
Figure imgf000012_0001
Figure imgf000012_0001
Une autre option s'offre également avec la forme de la vérole, concave et continue sans espaces vides, de la station support selon l'invention, est de la possibilité de la doter  Another option is also offered with the shape of the pox, concave and continuous without empty spaces, of the support station according to the invention, is the possibility to provide it
i ! d'un revêtement en caoutchouc pour isoler le revêtement inférieur de la bande du contact avec un matériau métallique comme c'était le cas dans les stations supports de l'art antérieur. i ! a rubber liner to isolate the lower liner from the contact with a metallic material as was the case in the support stations of the prior art.
Il devient alors possible de réduire l'épaisseur du revêtement inférieur de la bande, vpir même le supprimer, car il avait comme principal fonction : isoler la bande du contact avec le métal des rouleaux. D'énormes économies s'offrent alors, aussi bien dans le prix d'achat de la bande que dans le gain en énergie électrique, puisque le poids de la bande peut diminuer avec la réduction de l'épaisseur, ou carrément la suppression, du revêtement inférieur. Ceci étant bien entendu que le revêtement en caoutchouc de la vérole a une durée de vie plus longue que celle du revêtement inférieur de la bande, car il ne subit pas les mêmes efforts d'étirement ou de compression que subissait le revêtement inférieur de la bande dans les stations à trois rouleaux en forme trapézoïdale. It then becomes possible to reduce the thickness of the lower coating of the strip, even to remove it, because its main function was to isolate the strip from contact with the metal of the rollers. Huge savings are available, both in the purchase price of the band and in the gain in electrical energy, since the weight of the band can decrease with the reduction of the thickness, or the suppression of the lower coating. This being understood, the rubber coating of the pox has a longer life than that of the lower lining of the strip, because it does not undergo the same stretching or compression efforts that the lower lining of the strip underwent. in three-roller trapezoidal stations.
Selon l'invention, la station support caractérisée en ce qu'elle comporte un seul rouleau dont la surface est concave décrivant un arc de cercle, est une pièce permanente du convoyeur contrairement aux rouleaux conventionnels de l'art antérieur qui étaient des pièces d'usure qu'il fallait changer périodiquement. Le dispositif est destiné à un fonctionnement à vie sur les convoyeurs. Ceci réduit les coûts de la maintenance (coûts des rouleaux conventionnels, de la main d'oeuvre et ceux relevant du manque à gagner suite aux arrêts imprévus), et ceux liés aux opérations de l'inspection et de la surveillance systématiques pour localiser les rouleaux bloqués ou coincés qu'exigeait l'utilisation des stations support à plusieurs rouleaux. Comme il supprime tous les risques liés aux chutes des rouleaux puisque la station support est montée sur des paliers à roulements installés sur les bords du convoyeur, et ne peut en aucun cas présenter de tels risques (chute). La sécurité du personnel travaillant sur le convoyeur ou dans ses alentours est largement accrue avec la station à rouleau concave Aussi, l'utilisation de la station support à rouleau concave en substitution à la station support à trois rouleaux de l'art antérieur est-elle simple et avantageuse. La comparaison avec les stations à trois rouleaux en forme trapézoïdale est largement justifiée par le fait que ce sont ces stations à trois rouleaux qui sont les plus utilisées , actuellement sur les convoyeurs dans tous les secteurs d'activité. En effet, la conception de la station selon l'invention offre plusieurs possibilités d'utilisation. According to the invention, the support station characterized in that it comprises a single roll whose surface is concave describing a circular arc, is a permanent part of the conveyor contrary to the conventional rollers of the prior art which were parts of wear that had to be changed periodically. The device is intended for lifetime operation on conveyors. This reduces maintenance costs (conventional roll costs, labor costs and lost revenue costs due to unplanned outages), and routine inspection and monitoring operations to locate rolls blocked or jammed required for the use of multi-roll support stations. As it eliminates all the risks related to falling rolls since the support station is mounted on rolling bearings installed on the edges of the conveyor, and can not under any circumstances present such risks (fall). The safety of personnel working on or around the conveyor is greatly increased with the concave roller station. Also, is the use of the concave roller support station as a substitute for the prior art three-roller support station? simple and advantageous. The comparison with trapezoidal three-reel stations is largely justified by the fact that it is these three-reel stations which are the most used, currently on conveyors in all sectors of activity. Indeed, the design of the station according to the invention offers several possibilities of use.
Il i La station support selon l'invention est à installer sur le châssis du convoyeur par l'intermédiaire de paliers à roulements, et y est apte à recevoir une bande transporteuse en élastomère sans fin, la déformer en une courbature profonde suivant l'arc de cercle décrit par la vérole ; le déplacement de la bande fait tourner le rouleau concave avec moins de résistance comparé à la station support composée de trois rouleaux disposés suivant un forme géométrique. Ceci représente une première façon d'utilisation de la station support selon l'invention. He i The support station according to the invention is to be installed on the chassis of the conveyor by means of roller bearings, and is able to receive an endless elastomer conveyor belt, deforming it into a deep curvature following the arc of a circle. described by the pox; the displacement of the strip rotates the concave roller with less resistance compared to the support station composed of three rollers arranged in a geometrical shape. This represents a first way of using the support station according to the invention.
Dans une deuxième variante de l'utilisation de l'invention, l'arbre traversant est doté d'un organe de la transmission mécanique une poulie à plusieurs gorges ou un pignon à double denture, un organe du même type (poulie ou pignon selon la configuration retenue) est à installer sur l'arbre du tambour de commande côté opposé au groupe de commande (le côté libre de l'arbre du tambour). L'ensemble des ces éléments de la transmission mécanique aussi bien ceux installés sur les arbres traversant des stations supports que celui installé sur l'arbre du rambour de commande (poulies ou pignons selon le cas), sont joints par courroies ou par chaînes (selon la configuration retenue) pour transmettre le mouvement de rotation du tambour de commande entraîné par le groupe moto réducteur à l'ensemble des stations supports à rouleaux concaves, Le groupe de commande fait tourner le tambour dont l'arbre est joint à la première station à rouleau concave, cette même station étant liée par un organe de la transmission mécanique (courroie ou chaînes) à la station qui la suit lui transmet ce mouvement, et ainsi de suite jusqu'à la dernière station installée prés de la trémie de chargement. Chaque station reçoit le mouvement de la station qui est installée à son amant pour le transmettre à celle située à son aval. Ainsi, l'ensemble des stations à rouleaux concaves est entraîné par le groupe de commande dans un mouvement synchronisé, ce qui facilite le déplacement de la bande et la charge qu'elle contient. Selon cette option d'utilisation il y a réduction de la tension de traction que subissait la bande sur le pourtour du tambour de commande dans la configuration des stations support à trois rouleaux de l'art antérieur, ce qui la soulage et élimine les problèmes de décentrage, d'allongement ou de rupture. Dans le même ordre d'idée, les points de jonction de la bande (par collage à froid ou vulcanisation ou par agrafes) qui constituaient des points vulnérables sont soulagés de la forte tension de traction, par le mouvement synchronisé de l'ensemble des stations à rouleaux concaves, et ne présentent plus de risque de rupture. Dans une troisième variante d'utilisation des stations support selon l'invention, il est possible de regrouper les dites stations en plusieurs sous-ensembles, composés d'au moins deux rouleaux munies d'organes de la transmission mécanique poulie-courroie ou pignon- chaîne. Chaque sous-ensemble est doté d'un groupe de commande, et tôus les groupes de commande des sous-ensembles des stations support sont synchronisés dans leur mouvement de rotation avec le groupe de commande principal installé sur le tambour de tête. Il est possible alors de répartir la puissance sur plusieurs endroits du convoyeur. Le groupe de commande de tête est désigné comme maître, et les autres groupes de commande des stations support lui sont esclaves, l'utilisation d'un variateur de vitesse électronique est nécessaire pour la synchronisation du mouvement de rotation. In a second variant of the use of the invention, the traversing shaft is provided with a member of the mechanical transmission a pulley with several grooves or a pinion with double toothing, a member of the same type (pulley or pinion according to the selected configuration) is to be installed on the control drum shaft opposite to the control unit (the free side of the drum shaft). All these elements of the mechanical transmission, both those installed on the shafts passing through the support stations and the one installed on the shaft of the control drum (pulleys or pinions as the case may be), are joined by belts or by chains (according to the selected configuration) for transmitting the rotational movement of the control drum driven by the geared motor unit to the set of concave roller support stations, The control unit rotates the drum whose shaft is joined to the first station to concave roller, the same station being linked by a member of the mechanical transmission (belt or chains) to the station that follows it transmits this movement, and so on until the last station installed near the hopper loading. Each station receives the movement of the station which is installed to its lover to transmit it to that located downstream. Thus, the set of concave roller stations is driven by the control group in a synchronized movement, which facilitates the movement of the band and the load that it contains. According to this use option there is a reduction in the tensile tension experienced by the band on the periphery of the control drum in the configuration of the prior art three-roller support stations, which relieves it and eliminates the problems of decentering, elongation or rupture. In the same vein, the joining points of the strip (cold gluing or vulcanization or staples) which were vulnerable points are relieved of the high tensile tension, by the synchronized movement of all stations concave rollers, and no longer present a risk of rupture. In a third variant of use of the support stations according to the invention, it is possible to group said stations into several sub-assemblies, composed of at least two rollers provided with members of the pulley-belt mechanical transmission or pinion. chain. Each subassembly is provided with a control group, and all subassembly control groups of the support stations are synchronized in their rotational movement with the main control group installed on the head drum. It is then possible to distribute the power on several places of the conveyor. The head control group is designated as master, and the other control groups of the support stations are slaves to it, the use of an electronic speed controller is necessary for the synchronization of the rotational movement.
Dans une quatrième variante de l'utilisation des stations supports selon l'invention, chacune des dites stations est équipée de manière individuelle d'un groupe de commande. Le groupe de commande de la tête est toujours désigné comme maître et les groupes des autres stations lui sont esclaves (par l'utilisation de variateurs de vitesse). In a fourth variant of the use of the support stations according to the invention, each of said stations is individually equipped with a control group. The control group of the head is always designated as master and the groups of the other stations are slaves to it (by the use of variable speed drives).
Une grande flexibilité s'offre alors pour varier la vitesse de la bande, ce qui peut offrir la possibilité de réduire le poids de la matière transportée par mètre linéaire tout en conservant le débit nominal du convoyeur. A great flexibility is then offered to vary the speed of the belt, which may offer the possibility of reducing the weight of the material transported per linear meter while maintaining the nominal flow rate of the conveyor.
Comparées aux stations support de l'art antérieur qui n'offraient aucune possibilité de motorisation tant bien au niveau des encombrements que celui de la disposition des axes des rouleaux, les différentes variantes d'utilisation de la station à rouleau concave présentent plusieurs avantages. En effet, éliminer, les décentrages, les pièces d'usure et les pannes, répartir la puissance sur plusieurs endroits du convoyeur et augmenter la durée d'utilisation de la bande et par voie de conséquence le rendement globale du convoyeur, améliore la productivité des convoyeurs, la rentabilité des investissements, et la compétitivité commerciale. Compared to the support stations of the prior art which offered no possibility of motorization both in terms of congestion and that of the arrangement of the axes of the rollers, the various variants of use of the concave roller station have several advantages. In fact, eliminate, offsets, wear parts and failures, distribute the power on several locations of the conveyor and increase the duration of use of the belt and consequently the overall efficiency of the conveyor, improves the productivity of the conveyors. conveyors, the profitability of investments, and commercial competitiveness.
L'invention sera mieux comprise à la lecture des illustrations schématiques ci-dessolis exposées. The invention will be better understood on reading the schematic illustrations below.
La figure 1 est une représentation schématique d'une station support à trois rouleaux connue dans l'art antérieur. Les rouleaux(5) disposés en une géométrie trapézoïdale comme illustré par la Figl, supporte la bande(l) la déforme en une auge profonde,; et sont en rotation libre et indépendants les uns des autres. Les axes(6) des rouleaux(5) Figure 1 is a schematic representation of a three-roller support station known in the prior art. Rollers (5) arranged in trapezoidal geometry as illustrated by FIG. 1, supports the band (1) deforms it into a deep trough; and are in free rotation and independent of each other. The axes (6) of the rollers (5)
i  i
sont disposés selon une géométrie qui n'offre aucune possibilité de doter la station support d'un groupe de commande. Les espaces vides (détail A) entre le rouleau central horizontal et les rouleaux latéraux inclinés constituent un inconvénient majeur qui crée les forces parasites responsables de la plus parts des décentrages de la bande(l). Les même axes(6) des rouleaux (5) sont fixés sur le chevalet supports(7) par méplats ce qui présente une autre vulnérabilité des rouleaux(5) qui augmente le risque de la chute des rouleaux(5). Les extrémités des véroles en acier des trois rouleaux(5) sont en contact avec la bande(l), par l'intermédiaire du revêtement inférieur (4) de manière ponctuelle, et sous l'effet du poids de la bande(l) et de la charge qu'elle transporte (non représentée), exercent une pression importante sur le revêtement inferieur(4) de la bande(l) ce qui provoque des avaries ou des usures prématurées. La disposition en géométrie trapézoïdale des rouleaux(5), fait subir à la bande(l) une déformation cassante au niveau des espaces vides (Détail A) et expose le revêtement supérieur(2), le revêtement inferieur(4) et la structure de renforcement(3) de la bande(l) à une flexion latérale grave qui fatigue la bande(l) et accélère son usure. L'espace vide(a) situé entre le rouleau central horizontal et la base du chevalet support(7) est l'emplacement où vient se loger la matière déversée, et le coincement de la rotation du rouleau commence à cet endroit. Les opérations d'inspection et de nettoyage concernent principalement cet emplacement. Le détail A (détail A) représente les espaces vides entre le rouleau central horizontal et les rouleaux latéraux inclinés, et illustre bien la disposition des axes(6) des rouleaux(5) comme indépendants les un des autres dans leurs mouvement de rotation, et qui peuvent avoir d'après cette disposition (détail A) des vitesses différentes les uns des autres, ce qui crée les forces parasites responsables des décentrages de la bande(l). Le (détail A) montre bien le pliage cassant de la bande(l), et la position non concave qui casse le revêtement supérieur(2), le revêtement inferieur(4) et la structure de renforcement(3). ! are arranged in a geometry that offers no possibility of providing the support station with a control group. The empty spaces (detail A) between the horizontal central roller and the inclined lateral rollers constitute a major drawback which creates the parasitic forces responsible for most of the offsets of the strip (1). The same axes (6) of the rollers (5) are fixed on the flange (7) by flats which presents another vulnerability of the rollers (5) which increases the risk of falling rollers (5). The ends of the steel poxes of the three rollers (5) are in contact with the strip (1), via the lower coating (4) in a pointwise manner, and under the effect of the weight of the strip (1) and the load it carries (not shown), exert a significant pressure on the lower coating (4) of the band (l) causing damage or premature wear. The arrangement in trapezoidal geometry of the rollers (5) makes the band (1) undergo a brittle deformation at the empty spaces (Detail A) and exposes the upper covering (2), the lower covering (4) and the structure of the reinforcing (3) the band (1) at a severe lateral flexion which fatigues the band (1) and accelerates its wear. The empty space (a) located between the horizontal central roller and the base of the support rack (7) is the location where the spilled material is housed, and the jamming of the rotation of the roll begins there. Inspection and cleaning operations are mainly related to this location. The detail A (detail A) represents the empty spaces between the horizontal central roll and the inclined lateral rollers, and clearly illustrates the arrangement of the axes (6) of the rollers (5) as independent of each other in their rotational movement, and which can have according to this arrangement (detail A) speeds different from each other, which creates the parasitic forces responsible for offsets of the band (1). The (detail A) clearly shows the broken fold of the strip (1), and the non-concave position which breaks the upper coating (2), the lower coating (4) and the reinforcement structure (3). !
La Fig2 est une représentation schématique d'une station support selon l'invention. Le rouleau(8) dont la surface décrit un arc de cercle est obtenu par l'assemblage de deux cônes (disposés dos à dos) par soudure reçoit la bande(l) et la déforme suivant une Fig 2 is a schematic representation of a support station according to the invention. The roller (8) whose surface describes a circular arc is obtained by the assembly of two cones (arranged back to back) by welding receives the band (1) and deforms it according to a
i . géométrie moins grave que celle illustrée dans la Figl par (détail A).Les flasques(lÔ sous forme de disques renforces par des nervures(l 1) de renforcement sont montés sur le rouleau concave(8) par soudure. Les flasques (10) constituent un point d'appui important pour garantir le support de tout le poids composé de la bande (1) et sa charge et constituent également un point d'appui pour le rouleau (8) sur l'arbre traversant (9) afin que la forme en arc de cercle réagisse bien aux efforts de flexion. L'arbre traversant (9) d'un diamètre ne dépassant pas 35 mm est joint aux flasques(lO) également par soudure. L'ensemble du dispositif composé du rouleau(8), des flasques latéraux(lO), et de l'arbre traversant(9) constitue une pièce monobloc apte à être montée sur des paliers à roulements (non représentés) installés de parts et d'autres d'un convoyeur. La Fig2 montre bien que la bande(l) est déformée selon une géométrie concave en arc de cercle, et que le revêtement supérieur(2) et le revêtement nferieur(4) ainsi que la structure de renforcement(3) de la bande(l) sont pliés de manière concave et non pas cassante contrairement à la station support de l'art antérieur illustrée sur la Figl (détail A). i. geometry less serious than that illustrated in Figl by (detail A). The flanges (lO in the form of reinforced discs by reinforcing ribs (1) are mounted on the concave roller (8) by welding. The flanges (10) constitute an important support point to guarantee the support of all the compound weight of the strip (1) and its load and also constitute a point of support for the roller (8) on the traversing shaft ( 9) so that the arcuate shape responds well to the bending forces. The through shaft (9) with a diameter of not more than 35 mm is joined to the flanges (10) also by welding. The entire device consisting of the roller (8), side flanges (10), and the traversing shaft (9) constitutes a one-piece piece adapted to be mounted on rolling bearings (not shown) installed parts and d others of a conveyor. FIG. 2 clearly shows that the strip (1) is deformed according to a concave geometry in an arc of a circle, and that the upper coating (2) and the lower coating (4) as well as the reinforcement structure (3) of the strip (1) ) are folded concavely and not brittle unlike the support station of the prior art illustrated in Figl (detail A).
Les extrémités de l'arbre traversant (9) d'un diamètre de 35 mm maximum débordent des deux côtés flasques(lO) et sont aptes à être montés sur des paliers à roulements traditionnels (non représentés). Les flasques (10) sont sous la forme de disques renforcés sur leurs faces intérieures par les nervures (11). La forme de la vérole (8) étant concave et d'un seul tenant se présente bien pour recevoir un revêtement en caoutchouc (non représenté). L'ensemble constitué par de la vérole (8), les flasques latéraux (10) et l'arbre traversant (9) constitue une pièce monobloc à fonctionnement à vie sur un convoyeur, tourne avec l'avancement de la bande(l) sans balourds ni flexion. La station support selon l'invention, composée de la vérole concave (8) des flasques (10) et de l'arbre traversant (9) est apte à être montée sur seulement deux paliers à roulements traditionnels, et présente moins de résistance à l'avancement de la bande(l), et donc moins de consommation d'électricité car elle ne comporte que deux roulements, alqrs The ends of the traversing shaft (9) with a maximum diameter of 35 mm protrude from the two flanged sides (10) and are able to be mounted on conventional rolling bearings (not shown). The flanges (10) are in the form of disks reinforced on their inner faces by the ribs (11). The shape of the pox (8) being concave and in one piece is well to receive a rubber coating (not shown). The assembly consisting of the pox (8), the lateral flanges (10) and the traversing shaft (9) constitutes a one-piece piece operating for life on a conveyor, rotates with the advancement of the strip (1) without unbalance or flexion. The support station according to the invention, composed of the concave pox (8) of the flanges (10) and the through shaft (9) is able to be mounted on only two conventional rolling bearings, and has less resistance to the Advancement of the band (l), and therefore less electricity consumption because it has only two bearings, alqrs
i que la station support de l'art antérieur qui comportait trois rouleaux (5) opposait plus de résistance à la bande(l), car les dits rouleaux(5) comportaient deux roulements chacun soit six au total pour une station support !  i that the support station of the prior art which had three rollers (5) opposed more resistance to the band (l), because the said rollers (5) had two bearings each or six in total for a support station!
La Fig3 est une vue d'un ensemble de stations supports installées sur la trajectoire d'un convoyeur et montées sur des paliers à roulements pour former un lit concave en arc de cercle, et sont prêtes à recevoir une- bande en élastomère fermée sans fin pour le déformer en une courbure profonde. Le déplacement de la bande fait tourner les stations supports avec moins de résistance, car elles ne comportent que deux paliers à roulements par station comparativement aux stations supports de l'art antérieur qui opposaient plus de résistance, car elles comportaient deux roulements par rouleaux soit au total six roulements. La construction des convoyeurs devient simple et ne nécessitera plus tant matière comparée à ceux réalisés avec des stations supports à trois rouleaux. Deux longerons(17), de n'importe quel profilé, modulaire et disposées parallèlement l'une par rapport à l'autre, placé sur la trajectoire du convoyeur, et renforcées par les traverses (18) pour recevoir des paliersà roulements, sont suffisantes pour construire un convoyeur. D'énormes économies sont possibles avec les stations supports selon l'invention. Les dites longerons (17) sont modulaires et facilitent aussi bien le transport que le montage des convoyeurs. FIG. 3 is a view of a set of support stations installed in the path of a conveyor and mounted on rolling bearings to form a concave curved bed, and are ready to receive an endless closed elastomeric strip. for the deform into a deep curvature. The displacement of the strip rotates the support stations with less resistance, because they comprise only two rolling bearings per station compared to the support stations of the prior art which opposed more resistance because they had two bearings per roll or at the same time. total six bearings. The construction of the conveyors becomes simple and will not require so much material compared to those made with support stations with three rollers. Two rails (17) of any modular section and arranged parallel to one another, placed in the path of the conveyor, and reinforced by crosspieces (18) for receiving rolling bearings, are sufficient to build a conveyor. Huge savings are possible with the support stations according to the invention. The said longitudinal members (17) are modular and facilitate both the transport and assembly of conveyors.
La figure 4 est une vue d'un convoyeur équipé de stations supports dont les véroles (8) sont concaves en arc de cercle ; les arbres traversant (9) des dites stations supports sont dotés chacun d'entre eux d'un organe de transmission mécanique (19) poulie ou pignon, les dites organes de transmission sont liés entre eux par un élément de transfert du mouvement (20) courroie ou chaîne selon la configuration retenue pour l'organe (19). L'arbre (13) du tambour de commande (12) est équipé d'un organe de transmission mécanique (21) compatible avec ceux montés sur les arbres traversant (9) et relié avec l'arbre traversant (9) de la première station support par le même élément de transfert du mouvement (20) retenu pour les autres stations supports. Entraîné par le groupe de commande (14), l'arbre (13) du tambour de commande (12) entraine dans son mouvement de rotation l'arbre traversant (9) de la première station support. Cette dernière étant équipée d'un organe de la transmission (19) et reliée avec la station support qui la suit par l'élément de transfert du mouvement (20) Pentraine avec elle, et ainsi de suite jusqu'à la dernière station support. Le mouvement de rotation de toutes les stations supports facilite le déplacement de la bande et de la charge qu'elle transporte. Aussi, l'effort de tension que subissait la bande sur le tambour de commande (12) inévitable à cause de la disposition des rouleaux de la station support de l'art antérieur, qui condamnaient la bande à transmettre tout le long de son brin la force nécessaire à son déplacement, est-il soulagé par la rotation simultanée de toutes les stations supports selon l'invention. Un longue durée d'utilisation ainsi que l'élimination des déports, et lia possibilité d'augmenter la vitesse de la bande, et donc également la possibilité de réduire le poids par mètre linéaire de la charge tout en conservant le débit nominal du convoyeur, sont à compter parmi les avantages des stations supports à rouleaux concaves selon l'invention. La figure 5 est une vue d'une troisième variante d'utilisation de la station support à rouleau concave selon l'invention. Les stations supports à rouleaux concaves y figurent reliées entre elles par les organes de transmission mécanique (19), et par les éléments du transfert du mouvement (20) et sont regroupées en sous-ensemble. Chaque sous- ensemble est doté d'un groupe de commande (22). Le tambour de tête (12) est toujours entraîné par le groupe de commande (14). L'avantage de cette variante d'utilisation des stations à rouleaux concaves est de répartir la puissance nécessaire au déplacement de la bande sur plusieurs endroits du convoyeur. Selon cette variante il y a réduction de la tension au niveau du tambour de tête et répartition de la puissance sur tout le trajet du convoyeur ce qui soulage la bande et réduit le couple résistant au niveau de groupe de commande (12). L'utilisation d'un variateur de vitesse est nécessaire pour la synchronisation du mouvement de rotation des groupes de commande, aussi bien celui de tête (14) que ceux des sous-ensembles (22) Figure 4 is a view of a conveyor equipped with support stations whose pomegranates (8) are concave arcuate; the traversing shafts (9) of said support stations are each provided with a mechanical transmission member (19) pulley or pinion, said transmission members are interconnected by a movement transfer member (20). belt or chain according to the configuration selected for the member (19). The shaft (13) of the control drum (12) is equipped with a mechanical transmission member (21) compatible with those mounted on the traversing shafts (9) and connected with the traversing shaft (9) of the first station supported by the same transfer element of the movement (20) retained for the other support stations. Driven by the control unit (14), the shaft (13) of the control drum (12) drives in its rotational movement the traversing shaft (9) of the first support station. The latter is equipped with a transmission member (19) and connected with the support station which follows it by the movement transfer member (20) Pentraine with it, and so on until the last support station. The rotational movement of all the support stations facilitates the movement of the band and the load it carries. Also, the tension force experienced by the band on the control drum (12) inevitable because of the arrangement of the rollers of the support station of the prior art, which condemned the tape to transmit all along its strand the force necessary for its displacement, is it relieved by the simultaneous rotation of all the support stations according to the invention. Long service life and elimination of offsets, and possibility of increasing the speed of the belt, and therefore also the possibility of reducing the weight per linear meter of the load while maintaining the nominal flow rate of the conveyor, are to be counted among the advantages of the concave roller support stations according to the invention . FIG. 5 is a view of a third variant of use of the concave roller support station according to the invention. The concave roller support stations therein are interconnected by the mechanical transmission members (19) and the movement transfer elements (20) and are grouped together as a sub-assembly. Each subassembly is provided with a control group (22). The head drum (12) is always driven by the control unit (14). The advantage of this variant of use of concave roller stations is to distribute the power required to move the belt on several locations of the conveyor. According to this variant there is a reduction of the tension at the head drum and distribution of the power over the entire path of the conveyor which relieves the band and reduces the resisting torque at the control group level (12). The use of a variable speed drive is necessary for the synchronization of the rotational movement of the control groups, both the head (14) and the subassemblies (22).
La figure 6 est une représentation schématique de la quatrième variante d'utilisation de la station support à rouleau concave. Toutes les stations à rouleaux concaves(8) sont équipées, chacune d'entre elles et de manière individuelle, d'un groupe de commande (22) dont la puissance est adaptée à l'effort qu'elle doit fournir, localement, pour faire avancer la bande et sa charge (non représentées). La synchronisation de tous les groupes de commande (22) est réalisée par variateur de vitesse électronique. Soulager la bande de la forte tension qu'elle subissait au niveau du tambour de commande (12), répartir la puissance sur plusieurs endroits du convoyeur pour soulager le groupe de commande de tête (14), augmenter la vitesse de la bande et réduire la charge au mètre linéaire toutjen FIG. 6 is a schematic representation of the fourth variant of use of the concave roller support station. All the concave roller stations (8) are each equipped individually with a control unit (22) whose power is adapted to the effort it has to provide, locally, to make advance the tape and its load (not shown). The synchronization of all the control groups (22) is performed by electronic speed controller. Relieving the belt of the high tension it experienced at the control drum (12), distributing the power to several locations of the conveyor to relieve the head control group (14), increasing the speed of the belt and reducing the load by linear meter toutjen
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conservant le débit nominal du convoyeur sont les objectifs visés également par cette quatrième variante d'utilisation de la station support à rouleau concave. ; maintaining the nominal flow rate of the conveyor are the objectives also targeted by this fourth variant of use of the concave roller support station. ;
En se référant à la fig2 la station support selon l'invention est composée de là vérole (8) des flasques (10) renforcés par les nervures(l 1) et l'arbre traversant(9) d'un diamètre de 35 mm maximum.. La vérole (8) est réalisée par l'assemblage par soudure de deux cônes obtenus par la technique de repoussage et disposés dos à dos pour former une pièce concave décrivant un arc de cercle. Referring to FIG. 2, the support station according to the invention is composed of pits (8) of the flanges (10) reinforced by the ribs (1) and the traversing shaft (9) with a diameter of 35 mm maximum. .. The pox (8) is made by welding together two cones obtained by the spinning technique and arranged back to back to form a concave part describing a circular arc.
Les flasques (10) sous la forme de disques recevant, par soudures, sur leurs faces intérieures les nervures de renforcement (11) ; les dits flasques (11) sont soudé sur las bords de la vérole concave (8). The flanges (10) in the form of discs receiving, by welding, on their inner faces the reinforcing ribs (11); said flanges (11) are welded to the edges of the concave pox (8).
Les nervures de renforcement (11) placés selon une disposition triangulaire et décalées les unes des autres de 120° sont soudées sur les faces intérieures des flasques (10) The reinforcing ribs (11) arranged in a triangular arrangement and offset from each other by 120 ° are welded to the inner faces of the flanges (10)
L'arbre traversant (9) d'un diamètre allant de 20 à 35 mm selon la largeur de la bande, monté par soudure sur les flasques (10), et débordant des deux côtés des dits flasques (10) ; est apte à être monté sur des paliers à roulement placés de parts et d'autres du châssis du convoyeur pour recevoir, déformer en auge profonde et faire avancer une bande transporteuse en élastomère. The traversing shaft (9) with a diameter ranging from 20 to 35 mm depending on the width of the strip, mounted by welding on the flanges (10), and projecting on both sides of said flanges (10); is able to be mounted on rolling bearings placed on both sides of the conveyor frame to receive, deform in deep trough and advance an elastomeric conveyor belt.
Dans un autre mode de la réalisation de la station support à rouleau concave selon l'invention, la dite vérole concave en arc de cercle (8) est en matériau polymère technique (thermodurcissable ou thermoplastique). Par les procédés de la centrifugation ou coulée par gravité ou celui de l'injection ; la vérole concave est obtenu monobloc et d'un seul tenant. Des écrous sont à insérer dans le moule avant la coulée, ils permettront de recevoir les flasques latéraux (10) avec des boulons, l'arbre traversant (9) d'un diamètre allant de 20 à 35 mm maximum, selon la largeur de la bande, reste à souder avec les flasques latéraux (10) In another embodiment of the concave roller support station according to the invention, said arcuate concave pox (8) is made of a technical polymer material (thermosetting or thermoplastic). By the processes of centrifugation or casting by gravity or that of the injection; the concave pox is obtained in one piece and in one piece. Nuts are to be inserted in the mold before casting, they will receive the side flanges (10) with bolts, the through shaft (9) with a diameter of 20 to 35 mm maximum, depending on the width of the band, remains to be welded with side flanges (10)
La station support ainsi obtenue est une pièce monobloc et constitue un composant permanent du convoyeur destinée à y fonctionner à vie pour recevoir, déformer en auge profonde et faire avancer une bande en élastomère. ' The support station thus obtained is a one-piece piece and is a permanent component of the conveyor intended to operate there for life to receive, deform in deep trough and advance an elastomeric strip. '
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Aussi l'utilisation de la station support à rouleau concave trouve-t-elle son application sur tous les convoyeurs utilisés dans l'industrie, les mines et l'agriculture ayec i d'énormes avantages économiques et sécuritaires. | Also, the use of the concave roller support station finds its application on all conveyors used in industry, mining and agriculture with enormous economic and security benefits. |
Un des avantages intéressant de la station support selon l'invention est l'augmentation de la sécurité du personnel de la maintenance, puisque le dit personnel n'est plus appelé à changer les rouleaux, opération réalisée parfois alors que le convoyeur est en marché. Egalement le risque de la chute des rouleaux est à écarter de la liste des dangers des convoyeurs, puisque les rouleaux conventionnels sont supprimés et remplacés par la station à rouleau unique dont la vérole est concave et montée sur des paliers à roulement sans aucun risque de rupture ou de chute. One of the interesting advantages of the support station according to the invention is the increase in the safety of the maintenance personnel, since the said personnel are no longer called to change the rolls, sometimes performed while the conveyor is in the market. Also the risk of falling rollers is to be removed from the list of dangers conveyors, since the conventional rollers are removed and replaced by the single roller station whose pox is concave and mounted on rolling bearings without any risk of rupture or fall.
Un autre avantage intéressant de l'invention est que le coincement et le blocage des rouleaux n'existeront plus, puisque la station support est montée sur des paliers traditionnels dotés d'une étanchéité efficace. Les risques de chute des rouleaux de la déchirure ou la rupture de la bande sont éliminés. Un autre avantage intéressant de l'invention est la réduction du nombre de roulements contenu dans une station support. En effet, la station support à trois rouleaux connue dans l'art antérieur comportait six roulements, à raison de deux roulements par rouleau, alors que le dispositif proposé par l'invention ne compte que deux roulements, à raison d'un roulement par palier. Ceci réduit la résistance au déplacement de la bande, et par voie de conséquence la réduction de l'énergie électrique nécessaire pour faire avancer la bande et la charge qu'elle transporte. Another interesting advantage of the invention is that the jamming and locking of the rollers will no longer exist, since the support station is mounted on traditional bearings with effective sealing. The risk of falling rolls from tearing or breaking the web is eliminated. Another interesting advantage of the invention is the reduction in the number of bearings contained in a support station. Indeed, the three-roller support station known in the prior art had six bearings, at the rate of two bearings per roll, while the device proposed by the invention has only two bearings, one rolling per step . This reduces the resistance to movement of the strip, and consequently the reduction of electrical energy necessary to advance the strip and the load it carries.
Un autre avantage intéressant de l'invention est la réduction des coûts de la fabrication des convoyeurs. En effet, pour fabriquer désormais les convoyeurs à bande en élastomère sans fin et déformé en auge, il est suffisant d'assembler deux longerons, de n'importe quel profilé, de façon modulaire pour couvrir la distance du transport souhaitée, de les disposer distants à la largeur voulue et parallèle l'une par rapport à l'autre, de les renforcer par des traverses, de les monter sur des pieds pour atteindre la hauteur voulue, et de placer des paliers à roulements de parts et d'autres des dites longerons pour recevoir les stations support monoblocs à rouleaux concaves dont la vérole est en arc de cercle pour supporter déformer en auge et faire avancer la bande. Aussi, les convoyeurs ne nécessiteront plus tant de tôles ou de profilés en acier comparativement à ce qui a été nécessaire pour fabriquer l'infrastructure des convoyeurs pour recevoir les stations supports à trois rouleaux de l'art antérieur. Another interesting advantage of the invention is the reduction of the costs of manufacturing the conveyors. In fact, in order to manufacture endless elastomer belt conveyors with deformed troughs, it is sufficient to assemble two beams, of any profile, in a modular way to cover the distance of the desired transport, to have them distant. to the desired width and parallel to each other, to reinforce them by sleepers, to climb them on feet to reach the desired height, and to place bearings with bearings of parts and others of said rails to receive the monobloc support stations with concave rollers whose pox is in an arc to support deforming trough and advance the band. Also, the conveyors will no longer require so many sheets or steel profiles compared to what was needed to fabricate the conveyor infrastructure to receive the prior art three-roller support stations.
Un autre avantage intéressant de l'invention est que la surveillance des stations! à rouleaux concaves se fait, désormais, visuellement et à des distances sécurisantes pour le personnel de la maintenance, ou à distance de manière centralisée sur un pupitre qui reçoit un signal du mouvement par le biais de détecteurs de la rotation installés sur l'un des deux bouts de l'arbre traversant de la station support à rouleau concave. La dite surveillance à distance qui ne pouvait être réalisée pour les stations supports à trois rouleaux de l'art antérieur (seulement les tambours de tête ou de pieds pouvaient accepter une telle surveillance à distance), représente un avantage très intéressant de l'invention. En effet, couvrir de longues distances sur les passerelles des convoyeurs pour inspecter et surveiller l'état de marche des rouleaux, en tant qu'opération routinière et fastidieuse et risquée, n'est plus nécessaire avec l'utilisation du dispositif proposé par l'invention. Les convoyeurs en tant qu'infrastructures incontournables pour le transport des matières vrac sur de longues distances et à grands débits, deviennent alors plus disponibles, et plus économiques (fabrication et exploitation) avec des niveaux d'efficience très élevés. Another interesting advantage of the invention is that station monitoring! concave rollers is now done visually and at safe distances for maintenance personnel, or remotely centrally on a desk that receives a motion signal through rotational sensors installed on one of the two ends of the traversing shaft of the concave roller support station. The said remote monitoring which could not be carried out for the prior art three-roller support stations (only the head or foot drums could accept such remote monitoring), represents a very interesting advantage of the invention. Indeed, it is no longer necessary to cover long distances on conveyor gangways to inspect and monitor the running condition of the rollers as a routine and tedious and risky operation with the use of the device proposed by the manufacturer. invention. Conveyors as essential infrastructures for the transport of bulk materials over long distances and at high flow rates become more available and more economical (manufacture and operation) with very high efficiency levels.
Un autre avantage intéressant de l'invention est la possibilité d'augmenter la vitesse de la bande. Aussi, la régulation des débits de la matière passant d'un convoyeur à un autre, qui se faisait par la différenciation des largeurs de convoyeurs, est-elle possible, désormais, par la variation de la vitesse de la bande (variateur électronique de la fréquence ou par différenciation rapport de réduction des réducteurs de la vitesse). Ceci permet d'avoir des largeurs standards des convoyeurs, donc des largeurs standards pour les bandes également. Another interesting advantage of the invention is the possibility of increasing the speed of the band. Also, the regulation of material flows from one conveyor to another, which was done by the differentiation of conveyor widths, is it possible, from now on, by the variation of the speed of the belt (electronic variator of the conveyor belt). frequency or by differentiation reduction ratio of speed reducers). This makes it possible to have standard conveyor widths, hence standard widths for the belts as well.
Des économies notoires sont ainsi réalisées, aussi bien par les économies d'échelles générées par la fabrication des convoyeurs avec une seule largeur (donc une seule largeur de la bande), que pour le stockage des pièces des rechanges Significant savings are thus achieved, both by the economies of scale generated by the manufacture of conveyors with a single width (thus a single width of the band), as for the storage of spare parts
Par conséquent, moins d'arrêts et de pannes, moins de pièce d'usure, plus de sécurité pour le personnel, plus de durée de vie pour la bande et les autres composantsj du convoyeur, un standardisation des largeurs, une optimisation de la consommation de l'électricité, l'utilisation de la station support à un seul rouleau concave décrivant un! arc de cercle ouvre la voie à plusieurs avantages stratégiques qui contribueront à l'amélioration de la productivité, de la compétitivité et de la rentabilité. As a result, fewer downtimes and breakdowns, less wearing part, more safety for the personnel, longer life for belt and other conveyor components, standardization of widths, optimization of consumption of electricity, the use of the support station to a single concave roller describing a! An arc of the circle opens the way to several strategic advantages that will contribute to the improvement of productivity, competitiveness and profitability.

Claims

REVENDICATIONS:  CLAIMS:
Revendication 1/ Station support pour convoyeur composée d'un seul rouleau (8), de deux flasques latéraux (10) et d'un arbre traversant (9) ; destinée à recevoir, déformer en auge profonde et faire avancer une bande transporteuse en élastomère fermée sans fin, caractérisée en ce que le dit rouleau (8) présente une surface concave décrivant un arc de cercle, caractérisée en ce que les deux flasques latéraux (10) placés de parts et d'autres du dit rouleau (8) comportent des nervures de renforcement (11), et caractérisée en ce que l'arbre traversant(9) apte à être monté sur des paliers à roulements installés de parts et d'autres du châssis du dit convoyeur est d'un diamètre allant de 20 à 35 mm.  Claim 1 / Conveyor support station consisting of a single roller (8), two side plates (10) and a through shaft (9); intended to receive, to deform in deep trough and to advance an endless closed elastomer conveyor belt, characterized in that said roller (8) has a concave surface describing an arc of a circle, characterized in that the two lateral flanges (10 ) placed on either side of said roller (8) comprise reinforcing ribs (11), and characterized in that the through shaft (9) adapted to be mounted on rolling bearings installed parts and others of the chassis of said conveyor is of a diameter ranging from 20 to 35 mm.
Revendication 21 Station support selon la revendication 1 caractérisée en ce que les flasques latéraux (10) comportent sur leurs faces intérieures des nervures de renforcement( 11). Claim 21 Support station according to Claim 1, characterized in that the lateral flanges (10) have reinforcement ribs (11) on their inner faces.
Revendication 3/ Station support selon les revendications 1 et 2 caractérisée en ce que le rouleau concave (8) de la dite station comporte un revêtement en caoutchouc. Claim 3 / Support station according to claims 1 and 2 characterized in that the concave roller (8) of said station comprises a rubber coating.
Revendication 4/ Station support selon les revendications 1 à 3 caractérisée en ce que l'arbre traversant (9) d'un diamètre allant de 20 à 35 mm de la dite station est équipé d'organes de la transmission mécanique (19) et (20), et apte à recevoir le mouvement de rotation de la station située à son amont pour le transmettre à celle située à son aval. Claim 4 / Support station according to Claims 1 to 3, characterized in that the traversing shaft (9) with a diameter of 20 to 35 mm from said station is equipped with mechanical transmission members (19) and ( 20), and adapted to receive the rotational movement of the station located upstream to transmit it to that located downstream.
Revendication 5/ Station support selon les revendications de 1 à 3 caractérisée en ce que la dite station est équipée d'un groupe de commande (22). , Claim 5 / Support station according to claims 1 to 3 characterized in that said station is equipped with a control group (22). ,
I  I
Revendication 6/ Station support pour convoyeur à bande en élastomère fermée sans fin ; Claim 6 / Support station for an endless closed elastomer belt conveyor;
i composée d'un seul rouleau concave en arc de cercle (8), de deux flasques latéraux (10), et d'un arbre traversant (9) et apte à être montée sur des paliers à roulements installés de i part et d'autre du dit convoyeur, caractérisée en ce que le dit rouleau concave (8) est en ' matériau polymère technique thermodurcissable ou thermoplastique '  i consists of a single arcuate concave roller (8), two lateral flanges (10), and a through shaft (9) and adapted to be mounted on rolling bearings installed on the one hand and on the other. other of said conveyor, characterized in that said concave roll (8) is of thermosetting or thermoplastic technical polymer material
20 Revendication 11 Convoyeur à bande pour le transport des matières vrac composé de deux longerons (17) modulaires et parallèles l'une par rapport à l'autre et renforcées par des traverses (18) pour former l'ossature du dit convoyeur, caractérisé en ce qu'il comporte au mois deux stations supports à rouleaux concaves (8) décrivant un arc de cercle. 20 Claim 11 Belt conveyor for the conveyance of bulk materials consisting of two longitudinal members (17) which are modular and parallel to one another and reinforced by sleepers (18) to form the framework of said conveyor, characterized in that it comprises at least two concave roller support stations (8) describing an arc of a circle.
21 21
PCT/MA2013/000027 2013-08-13 2013-10-07 Support station having a single concave roller for troughing a conveyor belt and conveyor comprising same WO2015023171A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MA36189A MA36189B1 (en) 2013-08-13 2013-08-13 Support station has a single concave roll for trimming a conveyor belt and conveyor comprising
MA36189 2013-08-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105523365A (en) * 2015-12-31 2016-04-27 安徽冠东电子科技有限公司 Novel radian-controllable carrier roller

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US475628A (en) * 1892-05-24 Portable log-carrier
GB807062A (en) * 1954-11-08 1959-01-07 United States Steel Corp Self-centering roll suitable for centering endless belts or strip
GB1603557A (en) * 1978-05-24 1981-11-25 Conveyors Yorkshire Ltd Troughed belt conveyor
US6269943B1 (en) * 1999-07-30 2001-08-07 Asgco Manufacturing, Inc. Conveyor assembly
US6273244B1 (en) * 1998-06-19 2001-08-14 Ctb, Inc. Idler pulley for a conveyor assembly
US20050000782A1 (en) * 2003-01-31 2005-01-06 Mcdaniel Gordon M. Conveyor belt roller for a conveyor

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
US475628A (en) * 1892-05-24 Portable log-carrier
GB807062A (en) * 1954-11-08 1959-01-07 United States Steel Corp Self-centering roll suitable for centering endless belts or strip
GB1603557A (en) * 1978-05-24 1981-11-25 Conveyors Yorkshire Ltd Troughed belt conveyor
US6273244B1 (en) * 1998-06-19 2001-08-14 Ctb, Inc. Idler pulley for a conveyor assembly
US6269943B1 (en) * 1999-07-30 2001-08-07 Asgco Manufacturing, Inc. Conveyor assembly
US20050000782A1 (en) * 2003-01-31 2005-01-06 Mcdaniel Gordon M. Conveyor belt roller for a conveyor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105523365A (en) * 2015-12-31 2016-04-27 安徽冠东电子科技有限公司 Novel radian-controllable carrier roller

Also Published As

Publication number Publication date
MA36189B1 (en) 2016-04-29
MA20150093A3 (en) 2015-09-30
MA20150093A2 (en) 2015-03-31

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