FR3033321B1 - CONVEYOR FOR TRANSPORTING ARTICLES ALONG A CONVEYING ROUTE - Google Patents

Abstract

The invention relates to a conveyor for conveying articles along a conveyance route, said conveyor comprising a conveyor frame (12), a conveyor belt supported in the conveyor frame (12), said conveyor belt comprising an outer face of transport and an inner surface carried on at least one length of the conveying route by at least one first (13) support assembly, each first assembly comprising at least one rotatably supported roller. With each first assembly being integral, these support assemblies are configured to be inserted into and removed from the conveyor frame (12) from an edge thereof so that an operator can perform maintenance operations on that conveyor in a confined space. .

Description

Conveyor for transporting articles along a conveying route

BACKGROUND OF THE INVENTION

Field of the invention

The present invention relates to a conveyor for transporting articles along a conveyance route, in particular waste resulting from screening operations carried out during the pretreatment of wastewater.

It also relates to a conveyor assembly for a water recycling installation, this assembly comprising two conveyors contiguous to allow easy handling of one of these conveyors while the other conveyor is in operation.

Technological background

It is known to have facilities for pre-treatment of wastewater in the treatment plants, regardless of the treatment processes implemented downstream.

These pretreatment facilities aim to remove the coarser solid or particulate elements, which may make subsequent treatment of water or damage to equipment or works downstream in the stations less effective.

We can thus retain bulky waste (can, breeze block, household waste, ...) and smaller size elements (branches, leaves, metal objects, ...) by screening, sand by grit removal and fat by degreasing and deoiling operations.

The pretreatment by screening thus consists in passing the wastewater through one or more grids whose spacing of the bars determines the filtration category (pre-screening, medium screening and fine screening).

Each grid is cleaned more or less regularly either manually or by means of a mechanical cleaning element such as a comb.

This comb goes up along the grid carrying with it the waste retained by screening, which are then poured on the conveyor belt of a conveyor placed below the grid to be evacuated to a specific treatment area.

However, there is a strong heterogeneity of waste resulting from screening operations.

Depending on rainfall and seasonality, the quantity and structure of waste is very disparate. As a result, high uncertainties weigh on the dynamic loads that the belt and the various structural elements of the conveyor must withstand when the waste falls on the conveyor.

These uncertainties are sources of premature wear of some of the structural elements of the conveyor requiring maintenance operations by a team of at least two qualified operators.

Such interventions are not only long and expensive, but require the conveyor to stop.

In order to maintain optimal operation of these pretreatment facilities, it has been proposed to arrange two conveyors side by side so as to always have a conveyor operational during the maintenance of one of the two conveyors.

However, such a solution imposes a very limited accessibility to the conveyor members making these maintenance operations particularly difficult.

In addition, problems of offset strips and lack of tightness related to an extremely small footprint require work in unusual conditions of very low drop height of waste.

The present invention aims to overcome the various disadvantages described above by proposing a conveyor, particularly simple in its design and its operating mode, resistant and economical, and whose original design ensures easy maintenance in conditions of restricted access.

Another object of the present invention is such a conveyor allowing maintenance by a single operator.

Yet another object of the present invention is a conveyor assembly comprising two contiguous conveyors whose maintenance operations are facilitated.

BRIEF DESCRIPTION OF THE INVENTION To this end, the invention relates to a conveyor for transporting articles along a conveyance route, said conveyor comprising: a first and a second lateral edge, a conveyor frame, a conveyor belt supported in the conveyor frame, said belt comprising an outer conveying face and an inner face carried on at least one length of the conveying route by at least a first support assembly comprising at least one rotatably supported roller .

According to the invention, each first assembly is integral and comprises two wings placed on either side of said at least one rotatably supported roller, said at least one roller defining a main plane, said wings being movable between an inactive position where said wings are placed in, or substantially in, said main plane, and at least one so-called service position where said wings are inclined with respect to said main plane so that said first support assembly gives said conveyor belt a substantially Said first assembly comprising means for moving said wings from said inactive position to at least said service position configured to be actuated from said first edge of said conveyor, each first support assembly being also configured to be introduced and removed from said conveyor frame from said first edge of said conveyor.

The present invention is not limited to the screen conveyor but is applicable to any type of conveyor belt.

In different particular embodiments of this conveyor, each having its particular advantages and capable of many possible technical combinations: each wing of said at least one first support assembly comprises at least one impact bar, said means for moving said wings of said inactive position up to at least said service position comprises a screw device, the inner face of said strip is also carried on at least one length of the conveying route by at least a second one-piece support assembly, each second set comprising at least one roller rotatably supported, said conveyor comprises means for tilting each second support assembly between a so-called service position where said at least one roller of said second corresponding set is intended to carry said inner face of the strip of transport and a retracted position where said second corresponding set is inclined so as to be movable in position in and out of said conveyor frame from said first edge of said conveyor.

Preferably, for each second support assembly, said conveyor frame includes a guide means in position in said frame of the second corresponding support assembly introduced from said first lateral edge of said conveyor, said second support assembly then being in an inclined position.

Advantageously, each roller rotatably supported by at least each second support assembly is fixed in position by at least one attachment member. said frame having a plurality of support assemblies, it includes fasteners of each support assembly disposed in said frame, said fasteners being configured to allow release of each of said support assemblies from only the first side edge of the conveyor. The end of each second support assembly placed on the side of said first conveyor edge is locked in position by bolting onto said conveyor frame, the other end of said assembly being received in at least one receiving / holding housing. the conveyor comprises at least one bank placed on the second lateral edge of said conveyor, said at least one bank being intended to receive at least one flap, each bank including a flap support surface turned in an active position towards the inside of said conveyor frame and a surface opposite said support surface receiving the one or more fastenings of said at least one flap, each bank being movable between said active position to at least one retracted position where said bank is rectified so that its support surface is turned least partially outwardly of said conveyor frame to allow access to said opposite surface from within said conveyor frame for maintenance on said at least one flap.

Preferably, the conveyor comprises means for pivoting each bank between said service positions and retracted, said pivoting means being operable from said first lateral edge of said conveyor.

The present invention also relates to a conveyor assembly comprising at least two conveyors as described above.

According to the invention, these conveyors are joined in pairs by their second side edge to allow the handling of each conveyor from its first side edge.

The present invention also relates to an installation for recycling water, especially wastewater, comprising a screen.

According to the invention, this installation is equipped with a conveyor as described above or a conveying assembly as described above for discharging the waste from said screen.

Such a screen includes one or more filter elements such as grids, to retain the so-called coarse materials.

BRIEF DESCRIPTION OF THE DRAWINGS Other advantages, aims and particular features of the present invention will emerge from the description which follows, for an explanatory and non-limiting purpose, with reference to the appended drawings, in which: FIG. partial and in perspective of a conveyor according to a particular embodiment of the present invention, which shows first support assemblies in position on the frame of this conveyor and a first set being positioned in this conveyor; FIG. 2 is a perspective view from below of a first support assembly of FIG. 1, this first support member being in said service position; FIG. 3 is a perspective view from above of a first support assembly of FIG. 1, this first support member being in said service position; FIG. 4 is a partial and enlarged view of the conveyor of FIG. 1 showing the housings for receiving and holding one end of a first support assembly on the second edge of the conveyor; FIG. 5 is an enlarged view of one end of a second support assembly of the conveyor of FIG. 1 showing the fixing of a roll of this second set on its cradle; FIG. 6 is a perspective view of the conveyor of FIG. 1 showing one of its banks in active position; FIG. 7 is a perspective view of the conveyor of FIG. 1 showing one of its banks in a retracted position; FIG. 8 is an enlarged and partial view of the bank of FIG. 5 showing the arrangement of this bank on a support post of this bank;

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

It should first be noted that the figures are not to scale.

Figures 1 to 8 show partial views in perspective of a conveyor used to transport items such as waste, along a conveyance route, according to a preferred embodiment of the invention.

This conveyor has a first 10 and a second 11 side edge, a conveyor frame 12 and a conveyor belt (not shown) driven and supported in the conveyor frame.

The conveyor belt here has the shape of an endless smooth band such as a natural or synthetic rubber band.

This band is, in a known manner, driven in movement around return rollers that can be equipped with a re-entry protection and / or a fall arrest basket, a driving drum, a constraint drum and a drum. foot, these elements (not shown) forming part of the conveyor frame.

Such a conveyor may further comprise a cleaning brush of the conveyor belt, a scraper and a floating stone flush.

This conveyor belt comprises an outer conveying face and an inner face carried on at least one length of the conveyance route by first 13 support assemblies and second support assemblies.

Each first 13 set and each second 14 set are monoblock so as to be extracted and placed in the conveyor frame which carries them in one block.

Each first support assembly comprises two rollers having an axis of rotation perpendicular to, or substantially perpendicular to, the direction of travel of the conveyor belt for handling items transported on the outer transport surface along the route. conveying. These rollers 15 are here cylindrical rollers equipped with damping rubber rings. The axes of rotation of these rollers 15 are placed in a substantially horizontal plane relative to the surface of the ground supporting the chassis 12 of the conveyor.

Each first support assembly also comprises two wings placed on either side of these rotatably supported rollers, each wing having two longitudinal impact bars 16, 17 extending in the direction of travel of the conveyor belt. .

These wings are movable between an inactive position where they are placed in, or substantially in, the plane defined by the cylindrical rollers so that these wings being laid flat, the first corresponding support assembly can be extracted on the first edge. 10 of the conveyor, and a so-called service position where these wings being inclined relative to this plane, the first support assembly locally confers on the conveyor belt a substantially U-shape.

The first assembly also comprises a screw device 18 for moving these wings from the inactive position to the service position, this screw device 18 being operable from the first edge 10 of the conveyor.

In order to secure the attachment of each first assembly to the conveyor frame, one end of each first assembly is received in receiving / holding housings placed on the second edge 11 of the conveyor frame.

As shown in Figure 4, the end of each first 13 assembly here comprises two tabs 19, 20 for insertion into corresponding housing 21, 22, each housing 21, 22 blocking vertically and laterally this end. These housings 21, 22 are here hollow rectangles in which are introduced the tabs 19, 20 of the end of each first 13 support assembly.

Advantageously, thus obtaining a blocking of the end of each first 13 together on the second edge 11 of the conveyor without intervention of an operator on this edge.

An operator can thus position, or extract, from the first edge of the conveyor each first support assembly, placed in its inactive position, by sliding the first corresponding support assembly on guide rails leading to the end of the conveyor. first 13 support assembly in, or out of, housing 21, 22 receiving / retaining placed on the second edge 11 of the chassis 12 conveyor.

Each second support assembly comprises three rollers 24 rotatably supported. These rollers 24 are also here cylindrical rollers arranged to define the branches and the base of a U. The arrangement of these rollers 24 being fixed, the conveyor comprises tilting means of each second 14 support assembly to ensure the setting in position in and extracting the second 14 corresponding assembly out of the conveyor frame.

These tilting means thus allow the pivoting of each second 14 together between a service position, where these rollers 24 are intended to carry the inner face of the conveyor belt and a retracted position, where the second 14 assembly is inclined, its rollers 24 are spaced apart from the conveyor belt to allow the free movement of this second support assembly into and out of the conveyor frame from its first edge 10. The tilting of each second assembly 14 is done manually by means of a tool specific handling and is achievable by a single operator located on the side of the first side edge 10 of the conveyor.

In order to lock in position each second support assembly on the conveyor frame 12, the second corresponding assembly 14 is fixed at the level of the first edge 10 of the conveyor. By way of example, a fixation on the side and a fixation in the middle of the end of the second assembly 14 received at this first edge 10 are used. These fasteners (not shown) such as bolts, are well understood accessible for disassembly from the first side edge 10 of the conveyor.

As shown in FIG. 5, each roller 24 of each second support assembly 14 is also held in position to prevent it from emerging from its cradle 25 when the second support assembly 14 tilts to its retracted position. For this, a key 26 with beta pin can block the flat 27 of the corresponding roller in position in its cradle. Each roll 24 is thus rotatably held in its cradle 25.

As shown in Figures 6 to 8, the banks 28 disposed on the second edge 11 of the conveyor are advantageously retractable to allow maintenance of the flaps from the center of the conveyor.

For this, each side 28 placed on the second edge 11 comprises a support surface 29 of flap turned in the active position towards the interior of the conveyor frame, the surface opposite 30 to this support surface 29 receiving the fastenings of the flaps, each side 28 being movable between this active position to a retracted position where being tilted upwards, access to the opposite surface 30 of this side 28 from the inside of the conveyor frame allows maintenance of the bibs.

The means for pivoting each bank 28 between the service and retracted positions is arranged to be operable from the first side edge of the conveyor. For this, it is necessary to withdraw each pin now holding the bank in the service position (two pins per edge element), then manually switch the bank thus released from the first edge 10 of the conveyor to its retracted position.

Two conveyors being contiguous by their second edge, accessibility to the head and foot organs of a conveyor is impossible. The present conveyor advantageously allows a movement of the conveyors relative to each other to give access to these organs.

For this, each conveyor is placed on rollers arranged to allow the movement of the chassis of the corresponding conveyor. A guide assembly makes it possible to guide each chassis in translation between a service position and a maintenance position.

In addition, a locking / unlocking device makes it possible to lock the chassis in one of these positions or to unlock this chassis to allow its movement.

A pinion meshing with the teeth of a rectilinear rack and a steering wheel make it possible to ensure the movement of each conveyor frame. The diameter of the steering wheel advantageously allows a single operator to maneuver a conveyor frame.

Claims (12)

A conveyor for conveying articles along a conveyance route, said conveyor comprising: a first (10) and a second (11) side edge, a conveyor frame (12), a conveyor belt supported in a conveyor belt, the conveyor frame (12), said band comprising an outer conveying face and an inner face carried on at least one length of the conveying route by at least one first (13) support assembly comprising at least one roller (15); ) rotatably supported, characterized in that - each first assembly is integral and comprises two wings placed on either side of said at least one roller (15) rotatably supported, said at least one roller (15) defining a main plane containing an axis of rotation of said at least one roller and substantially horizontal with respect to the ground surface supporting the frame (12) of said conveyor, said wings being movable between an inactive position where said wings are placed in, or substantially in, said main plane, and at least one so-called service position where said wings are inclined with respect to said main plane so that said first (13) support assembly gives said conveyor belt a shape substantially U-shaped, said first assembly including means for moving said wings from said inactive position to at least said service position configured to be actuated from said first edge of said conveyor, each first (13) support assembly also being configured to be introduced and removed from said conveyor frame (12) from said first edge of said conveyor. 2. Conveyor according to claim 1, characterized in that each of said wings of said at least one (13) support assembly comprises at least one bar (16,17) of impact. 3. Conveyor according to claim 1 or 2, characterized in that said means for moving said wings from said inactive position to at least said operating position comprises a device (18) screw. 4. Conveyor according to any one of claims 1 to 3, characterized in that the inner face of said strip is also carried on at least one length of the conveying route by at least one second (14) support assembly monobloc each second assembly comprising at least one roller (24) rotatably supported, said conveyor comprises means for tilting each second (14) support assembly between a so-called service position where said at least one roller (24) of said second (14) corresponding assembly is intended to carry said inner face of the conveyor belt and a retracted position where said second corresponding set is inclined so as to be displaceable in position in and out of said conveyor frame (12) from said first (10) ) edge of said conveyor. Conveyor according to claim 4, characterized in that, for each second (14) support assembly, said conveyor frame (12) comprises a guide means in position in said frame of the second (14) corresponding support set introduced. from said first (10) side edge of said conveyor, said second (14) support assembly then being in an inclined position G. Conveyor according to claim 4 or 5, characterized in that each roller rotatably supported by at least each second (14) support assembly is fixed in position by at least one attachment member 7. Conveyor according to any one of claims 1 to 6, characterized in that said frame comprising a plurality of support assemblies, it comprises fasteners of each support assembly placed in said frame, said fasteners being configured to allow the release of each of these support assemblies from the only first (10) side edge of the conveyor. 8. Conveyor according to claims 6 and 7, characterized in that the end of each second support assembly (14) placed on the side of said first conveyor edge is locked in position by bolting onto said conveyor frame (12). 9. Conveyor according to any one of claims 1 to 8, characterized in that it comprises at least one side (28) placed on the second (11) side edge of said conveyor, said at least one side (28) being intended receiving at least one flap, each flange (28) comprising a flap support surface turned inwardly inwardly of said conveyor frame (12) and a surface opposite said support surface receiving the at least one fastener of said at least one flap a flap, each bank (28) being movable between said active position to at least one retracted position where said bank (28) is straightened so that its support surface is turned at least partly outwardly of said frame (12); ) of conveyor to allow access to said opposite surface from the inside of said conveyor frame (12) for maintenance on said at least one flap. 10. Conveyor according to claim 9, characterized in that it comprises a pivoting means of each bank (28) between said service positions and retracted, said pivoting means being operable from said first (10) side edge of said conveyor 11. Conveyor according to any one of claims 1 to 10, characterized in that said frame is movable between a first so-called service position and a maintenance position giving free access to at least the head and foot members of said conveyor on both side edges of said conveyor. 12. conveyor assembly comprising two conveyors according to any one of claims 1 to 11, characterized in that said conveyors are contiguous by their second (11) side edge to allow the handling of each conveyor from its first (10) side edge . 13. Installation for recycling water comprising a screen, characterized in that it is equipped with a conveyor according to any one of claims 1 to 11 or a conveyor assembly according to claim 12, to evacuate waste from said screen.