EP3512787A1 - Systeme et procede de nettoyage d'une bande transporteuse, notamment au moyen d'un bain de liquide soumis a des vibrations ultrasonores - Google Patents
Systeme et procede de nettoyage d'une bande transporteuse, notamment au moyen d'un bain de liquide soumis a des vibrations ultrasonoresInfo
- Publication number
- EP3512787A1 EP3512787A1 EP17761906.1A EP17761906A EP3512787A1 EP 3512787 A1 EP3512787 A1 EP 3512787A1 EP 17761906 A EP17761906 A EP 17761906A EP 3512787 A1 EP3512787 A1 EP 3512787A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cleaning
- conveyor belt
- conveyor
- assembly
- centering
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/10—Cleaning devices
- B65G45/105—Cleaning devices comprising vibrating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
- B08B3/123—Cleaning travelling work, e.g. webs, articles on a conveyor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/10—Cleaning devices
- B65G45/22—Cleaning devices comprising fluid applying means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/10—Cleaning devices
- B65G45/24—Cleaning devices comprising plural diverse cleaning devices
Definitions
- the present invention relates to cleaning a conveyor belt. It finds more particularly, but not exclusively, its application to the cleaning of a conveyor belt intended to be used for transporting processed or unprocessed food products, especially agri-food products or cleaning a conveyor belt intended to be used for transporting products in the pharmaceutical or cosmetic field.
- a method for cleaning, in use, a conveyor belt carrying agricultural products, such as for example eggs, for the purpose of disinfecting the conveyor belt by destroying the microorganisms that can develop into course of use on the surface of the conveyor belt is guided and mechanically deflected, in particular by means of an arm which is equipped with a guide roller which is fixed on the conveyor and which is vertically movable relative to the conveyor. so as to immerse and circulate the conveyor belt in a bath containing a cleaning liquid subjected to ultrasonic vibrations, and preferably a water bath containing disinfectants.
- This cleaning process is interesting because the setting up or removal of the cleaning bath under the conveyor belt can be carried out easily, when the deflecting arm of the conveyor belt is brought to the upper position so as to completely exit the conveyor belt. cleaning bath.
- this cleaning method has the advantage of can be used to clean a moving conveyor belt, for example in use, and whatever inclination of the conveyor belt.
- this movable deflection arm vertically between a low position, in which it allows to immerse the conveyor belt in the cleaning bath, and a high position, in which it allows to completely remove the conveyor belt from the cleaning bath, has the disadvantage of having to significantly change the tension of the conveyor belt, so as to change its path length locally in its path portion where it is deflected by the arm. Indeed, when the arm is in the low position, the conveyor belt must be very strongly relaxed so as to locally increase significantly the travel length of the conveyor belt, and conversely when the arm is in the up position, the The conveyor belt must be very tight so as to locally shorten the travel length of the conveyor belt.
- the cleaning system comprises a cleaning device in the form of a movable carriage, on which is mounted a cleaning assembly comprising especially a tank and a rotating brush.
- This brush cleaning assembly is rotatably articulated on the movable carriage and can be rotated relative to the carriage by means of hydraulic cylinders, for positioning the brush cleaning assembly 8 relative to the conveyor belt.
- the cleaning system further comprises a backing plate ("Gegendruckplatte”) which is positioned above the lower run of the conveyor belt.
- the cleaning device with its brush-cleaning assembly is positioned in relation to the frame supporting the conveyor belt in the low position and the cleaning device (that is to say the mobile carriage) by means of centering pins ("Zentrierlixe").
- the cleaning device that is to say the mobile carriage
- the brush cleaning assembly is pivoted upwards and is pressed against the conveyor belt which is in turn supported. by the platinum counterpressure.
- the cleaning system comprises a sole allowing a guide of the lower strand of the conveyor belt and a cleaning device which consists of a main roll, an upstream brush roll and a a downstream brush roll, which is carried by a carriage.
- the sole is moved to the active abutment position against the conveyor belt to allow contact of the band on the brush rollers of the cleaning device.
- 003947 and FR 2 856 997 advantageously allow to easily place or remove the cleaning system relative to the conveyor belt. On the other hand, they do not allow precise positioning of the cleaning device with respect to the portion of the conveyor belt to be cleaned.
- An object of the invention is to propose a new technical solution for cleaning a moving conveyor belt, which advantageously allows easy and quick set-up and removal of the means for cleaning the conveyor belt, and in particular and for the difference of the solution of the patent application US 2014/031 1862, without significant modification of the tension of the conveyor belt at each setting up or removal of the cleaning means, while allowing a fast and precise positioning of the cleaning means with respect to the conveyor belt.
- Another object of the invention is to propose a new technical solution for cleaning a moving conveyor belt that can be easily adapted to different types of conveyor without significant modification of the conveyor.
- the invention thus relates to a cleaning system of a conveyor belt of a conveyor, comprising a guiding device and a cleaning device, which comprises a cleaning assembly (which can be moved relative to the conveyor; guide comprises fastening means for fixing it on the conveyor, and guiding means enabling, when the guiding device is fixed to the conveyor, guiding the moving conveyor belt with positioning of a portion of the conveyor belt in a reference plane, the guiding device comprises first centering means and the cleaning device comprises second centering means, which are able to cooperate with the first centering means to position the cleaning assembly with respect to the plane reference device, the cleaning device comprises adjustment means, which allow adjustment of the position of the cleaning assembly, da ns a cleaning position in which the second centering means cooperate with the first centering means and the cleaning assembly is wedged in position relative to the portion of the conveyor belt in the reference plane.
- cleaning or “cleansing” should be interpreted with their broadest acceptance, and regardless of the size or nature of the contaminants that have developed and / or attached to the web. conveyor.
- the action of "cleaning” or “cleaning” the strip conveyor covers any action, including mechanical and / or physical and / or chemical, on the strip to remove from the conveyor belt all or part of the contaminants (impurities, dirt, organic matter, microorganisms, bacteria, ...) that have occurred developed and / or attached to the conveyor belt.
- the action of "cleaning” or “cleaning” also covers any action of decontamination, disinfection or sterilization of the conveyor belt to destroy and / or inhibit all or part of the contaminants that have developed and / or attached to the conveyor belt, including organic or biological contaminants such as microorganisms, bacteria, without these contaminants necessarily being removed from the conveyor belt.
- the term "conveyor belt” covers any type of known conveyor belt, capable of forming a mobile transport surface, and whatever may be the structure, construction, and dimensions of the conveyor belt.
- the conveyor belt may be a band of material (for example a textile band, rubber band, etc. That is more or less smooth and more or less thick, or may consist of assembled elements of chain type or articulated links.
- the cleaning system of the invention may comprise the following additional and optional features, taken alone or in combination with each other:
- the adjustment means allow adjustment of the position of the cleaning assembly between firstly said cleaning position, and secondly a retracted position, wherein the second centering means are disengaged from the first means of centering.
- the cleaning device In said one retracted position of the cleaning assembly, the cleaning device can be moved freely relative to the conveyor.
- the cleaning device comprises a mobile carriage on which is mounted said cleaning assembly.
- the guiding means of the guiding device comprise two parallel and spaced apart guide rollers, against which the conveyor belt is applied while being stretched, said portion of the conveyor belt in said reference plane being the portion of conveyor belt that extends between the two guide rollers.
- the guiding device comprises means for adjusting the inclination of said reference plane.
- the guide device comprises a first frame intended to be fixed to the conveyor and a second frame, which carries the guide means, and which is secured to the first frame being movable relative to the first frame, so as to allow a modification of the tilting said reference plane relative to the first frame; the means for adjusting the inclination of said reference plane comprise locking means for locking the second frame relative to the first frame.
- the first centering means comprise centering fingers for defining an adjustment plane and the second centering means comprise a centering housing for each centering finger.
- the cleaning assembly comprises cleaning means and elastic compression means, of the spring type, which are able to be compressed when the cleaning assembly is in its cleaning position, and which, when compressed, allow to exert a push on the means of cleaning.
- the cleaning means of the cleaning assembly have two degrees of freedom in rotation, so as to allow self-positioning of these cleaning means in abutment against the guiding device, under the centering action of the first and second centering means. in combination with the thrust action of the elastic compression means.
- the cleaning assembly comprises cleaning means comprising a cleaning tank for containing a cleaning liquid bath.
- the cleaning means comprise ultrasonic means for ultrasonic vibration of the vessel.
- the cleaning assembly comprises at least one squeegee) for scraping the carrier transport surface.
- the cleaning assembly comprises cleaning means chosen from the following list: rotary brush-type mechanical cleaning device, device for emitting radiation, and more particularly ultraviolet or infrared radiation, air-blowing device or vapor, a device for blowing a gas, and more particularly an ethylene oxide gas and / or gaseous hydrogen peroxide, and / or ozone, a device for spraying or vaporizing a gas cleaning fluid, plasma generating device, heating device, suction cleaning device.
- cleaning means chosen from the following list: rotary brush-type mechanical cleaning device, device for emitting radiation, and more particularly ultraviolet or infrared radiation, air-blowing device or vapor, a device for blowing a gas, and more particularly an ethylene oxide gas and / or gaseous hydrogen peroxide, and / or ozone, a device for spraying or vaporizing a gas cleaning fluid, plasma generating device, heating device, suction cleaning device.
- Another object of the invention is an assembly comprising a above-mentioned cleaning system and a conveyor comprising
- this set may comprise the additional and optional features hereafter, taken alone or in combination with each other:
- the guiding device of the cleaning system is fixed or can be attached to the conveyor so that the reference plane is horizontal or that the reference plane can be adjusted relative to the conveyor so as to be horizontal, once that the guiding device of the cleaning system is attached to the conveyor.
- the cleaning assembly is positioned or is positionable in a cleaning position, wherein at least the conveying face of the portion of the conveyor belt positioned in the reference plane is immersed in a bath of cleaning liquid of the cleaning set, and preferably so that the entire portion of the conveyor belt positioned in the reference plane is immersed in a cleaning liquid bath of the cleaning assembly.
- the subject of the invention is also a method for cleaning a conveyor belt of a conveyor by means of a cleaning system referred to above, in which the guiding device is fixed on the conveyor, the device for guiding, so that a portion of the conveyor belt is guided and positioned in a reference plane, and positioning the cleaning assembly of the cleaning device relative to the guiding device, using the first and second centering means, so as to wedge in position the cleaning assembly relative to the portion of the conveyor belt in the reference plane, then the conveyor is set in motion so as to scroll with respect to the assembly cleaning and the cleaning assembly is operated so as to clean at least the conveying face of the conveyor belt, and preferably the entire conveyor belt.
- this method may comprise the following additional and optional features, taken alone or in combination with each other:
- the cleaning assembly comprises a bath of cleaning liquid and is positioned in a cleaning position, wherein at least the transport face of the portion of the conveyor belt positioned in the reference plane is immersed in a liquid bath cleaning the cleaning assembly, and preferably such that the entire portion of the conveyor belt positioned in the reference plane is immersed in a cleaning liquid bath of the cleaning assembly.
- the bath of cleaning liquid is subjected to ultrasonic vibrations.
- the liquid bath also comprises detergent agents and / or disinfecting agents.
- the invention also relates to a use of a cleaning system referred to above to clean a moving conveyor belt.
- FIG. 1 is an isometric perspective view of an alternative embodiment of a mobile cleaning device according to the invention
- FIG. 2 is an isometric perspective view of an alternative embodiment of a guiding device suitable for use with the cleaning device of FIG. 1;
- FIG. 3 is an isometric perspective view of the guiding device of FIG. 2 mounted on a conveyor;
- FIG. 4 is an isometric perspective view of the guiding device of FIG. 2 mounted on a conveyor and of the cleaning device of FIG. 1 positioned in the cleaning position, under the conveyor and in abutment against the guiding device;
- FIG. 5 is a view, in cross section in the vertical plane V-V of Figure 4, the cleaning device positioned in the cleaning position, under the conveyor and bearing against the guide device;
- FIG. 6 is a cross-sectional view, in the vertical plane VI-VI of Figure 5, of the cleaning assembly of the cleaning device positioned in the cleaning position, under the conveyor and bearing against the guide device ;
- FIG. 7 to 9 illustrate the steps of mounting and adjusting the guiding device of Figure 2 on a conveyor;
- FIG. 10 is a cross-sectional view showing the compensation of the level of the cleaning tank relative to the carriage of the cleaning device, when the carriage of this device is on a floor that is not horizontal.
- Figure 1 1 is an isometric perspective view of the figurel cleaning device, when the cleaning assembly of this device is tilted in a position facilitating its cleaning.
- a cleaning system comprises a mobile cleaning device 1, which is shown in FIG. 1, and a guiding device 2, which is shown in FIG. 2 is intended to be permanently fixed (FIG. 3) on the carrier frame 30 of a conveyor 3 comprising a conveyor belt 31. It allows a guide and a positioning in a reference plane P1 of a portion 31b ( Figure 9) of the conveyor belt 31 in motion, the cleaning of the moving conveyor belt being formed in this portion 31b.
- this reference plane P1 is horizontal. In other applications, implementing other cleaning techniques, this reference plane P1 may not be horizontal.
- the movable cleaning device 1 comprises a mobile support, in the form more particularly of a mobile carriage 10 on wheels R, on which are mounted:
- a cleaning assembly 1 1 whose height position relative to the carriage 10 is adjustable
- the adjustment means 12 comprise a vertical column 120 comprising a fixed guide part 120a and a movable part 120b, on which is fixed cantilevered a carrier arm 122, and which can slide height, under the action of a steering wheel 121, being guided by the fixed guide portion 120a.
- the cleaning assembly 1 1 is integral and is carried by the support arm 122. By rotating the handwheel 121 in one direction or the other (FIG. 1 / arrows D and G), the position is manually adjusted. in height of the cleaning assembly 1 1 carried relative to the carriage 10, moving it vertically downwards or upwards.
- the cleaning assembly 11 comprises a cleaning tank 110, for example made of stainless steel, intended for use in containing a bath of a cleaning liquid, which may for example be water or water. containing disinfecting agents and / or diluted detergents.
- this vessel 1 10 is equipped with ultrasonic transducers 1 13, which are fixed on the outside to the bottom wall 1 10a of the tank. When they are powered by high frequency electrical energy delivered by an ultrasound generator housed in the electrical cabinet 13, these ultrasonic transducers 1 13 allow, in a manner known per se, a vibration of the vessel 1 10, and thereby the bath of cleaning liquid in the tank 1 10, at ultrasonic frequencies.
- This tank 1 10 also comprises in its upper face four conical centering housings 1 10a (FIG. 1), which are intended to cooperate respectively with conical centering fingers 23 of the guiding device 2.
- the cleaning tank 1 10, equipped with one or more ultrasonic transducers 1 13, is mounted on a frame 1 12 by means of four compliments 1 1 1 to helical compression springs 1 1 1 a, which make it possible to confer on the assembly cleaning tank 1 10 / transducer 1 13, and with respect to the frame 1 12, two degrees of freedom in rotation in a horizontal plane.
- these compliments 1 1 1 with coil springs 1 1 1 a thus allow self-positioning of the cleaning vessel 1 10 in abutment against the guiding device 2, the springs 1 1 1 a allowing to push vertically and hold the tank 1 10 in abutment against the guide device 2 when compressed, and the tank 1 10 resuming its initial rest position of Figure 1 when the springs 1 1 1 a are not compressed .
- the frame 1 12 of the tank is further mounted on the support arm 122 via a pivot axis 1 15, which can be locked by an indexing finger 14, when cleaning assembly 11 is in the position of use illustrated in FIG.
- this pivot 1 13 allows a quick and easy rotation of the cleaning assembly 1 1, a large angle of rotation, for example 95 ° as shown in Figure 1 1, in order to position the cleaning assembly 1 1, and in particular the vessel 1 10, in a tilted position facilitating its cleaning, for example by means of a jet of water.
- the guide device 2 comprises a frame 21 to be fixed to the frame of a conveyor.
- This frame comprises two crosspieces 210, each having a cornea 210a L, and spaced by threaded rods 21 1.
- These threaded rods 21 1 allow adjustment of the spacing between the two crossbars 210, so that the frame 21 can act as a universal clamp, for its attachment to the frame of a conveyor, the cornices L 210a cross members 210 acting as clamping jaws of this clamp.
- the guiding device 2 also comprises a roller support frame 22 comprising two roller crosspieces 220, which are mounted respectively on the two crosspieces 210 of the frame 21 and which serve as support for two idle guide rollers 20, of the same diameter, which are parallel and spaced, and which are each rotatably mounted (axes of rotation A) on the two cross-rollers 220.
- On each cross-member 220 are furthermore fixed two centering fingers 23, which in this particular example are conically shaped and which are fastened, for example by screwing, under the cross-member 220, at each end. of the crosshead roll holder 220.
- Each roller cross member 220 is movable relative to the corresponding fixed cross member 210, so that its inclination in a plane perpendicular to the axis of rotation A of the guide rollers 20 can be modified, that is to say say in Figure 2 in a plane parallel to the plane (X, Z).
- the guiding device 2 further comprises adjustment means for blocking the inclination of each cross roller holder 220, once its inclination has been controlled and is correct.
- these adjustment means comprise, for each cross-roller 220, two studs 24, which are fixed under the L-shaped ledge 210a of each fixed crossbeam 210, and on which are threaded the cross-member 210, and lock nut / locknut type locking means for each bolt 24.
- the conveyor belt 31 is expanded and the frame 21 is fixed to the carrier frame 30 of the conveyor 3.
- the two crosspieces 210 are assembled by means of the two threaded rods 21 1, so as to constitute the chassis 21; each crossbar 210 of this frame 21 is positioned relative to the carrier frame 30 of the conveyor 3, and the spacing between the two crosspieces 210 is adjusted by means of the threaded rods 21 1 so as to fix the frame 210 to the support frame 30, by clamping this support frame 30 between the two cross members 210, which act as a clamping jaw.
- a counter-nut 25a (FIG. 7) is threaded onto each bolt 24.
- each crosspiece is assembled roller holder 220 with the corresponding fixed cross member 210, firstly by threading it onto the studs 24 and locking it vertically on each bolt 24 by means of a brake nut 25b (FIG. 8), and secondly by assembling it with the fixed cross member 210 by means of a plate 26 and two screws 27 passed through the plate 26 and through adjustment slots 28, which are formed in the cross-member 220.
- These lights adjustment 28 allow a modification of the inclination of the roller cross member 220 relative to the fixed cross member 210 in a plane parallel to the plane (X, Z) (plane perpendicular to the axis of rotation A of the guide rollers 20) .
- each roller cross member 220 is assembled with the corresponding fixed cross member 210, the inclination of each cross roll holder 220 is adjusted in a plane parallel to the (X, Z) plane, so that the four centering fingers 23 are positioned in one and the same horizontal adjustment plane P2 (FIG. 9), and this adjustment is clamped by clamping the cross-member support member 220 by means of each brake nut 25b / locknut 25a on each stud 24.
- the horizontal control of the centering fingers 23 may be done for example by means of a bubble level and disks 23 'temporarily mounted for adjustment in place of each centering finger 23, these discs 23 'being then replaced by the centering fingers 23, once the adjustment is made.
- the guide rollers 20 are mounted on the roll-carrying struts 220, for example by means of brake nuts, and then the conveyor belt 31 is tightened so that its lower strand is applied, being stretched, against the two guide rollers 20 ( Figure 9), which thanks to the above adjustment are aligned in the same horizontal plane.
- this conveyor belt 31 is thus positioned and guided by the guide rollers 20, so that in the portion 31b of the lower run of the conveyor belt 31 between the guide rollers 20, the upper face 31c (face facing the rolls of 20) guidance of the lower strand of this conveyor belt is positioned in a reference plane P1 (plane tangential to the two guide rollers 20) which is parallel to the adjustment plane P2 of the centering fingers 23, that is to say a plane of P1 horizontal reference in this application. Moreover, the distance (FIG. 9-height H) between this reference plane P1 and the adjustment plane P2 of the centering fingers 23 is constant and known.
- the guiding device 2 may advantageously be adapted to an existing conveyor.
- the guiding device 2 can also be integrated into a conveyor at the stage of designing and manufacturing this conveyor.
- the conveyor belt 31 of the conveyor 3 is mounted on a carrier frame 31 placed on the ground.
- the aforementioned adjustment of horizontality of the centering fingers 23, and thus the position in height and horizontality (reference plane P1) of the lower run of the conveyor belt 31, in a portion 31b which is located between the two guide rollers 20, advantageously allows to overcome any inclination or ground, compensating for the inclination relative to horizontal support frame 31 which may arise.
- the invention is not limited to a conveyor frame 31 placed on the ground, but can also be applied to a suspended conveyor for which the aforementioned adjustment retains its interest.
- the invention can also advantageously be applied to a conveyor (placed on the ground or suspended) inclined relative to the horizontal, so that the upper strand of the conveyor belt forms a rising or falling transport surface , the aforementioned adjustment to compensate for this inclination of the conveyor.
- the conveyor belt 31 is conventionally formed by an endless belt forming a loop and wound and tensioned on two detour rollers 32, at least one of which is motorized to enable the conveyor belt to be set in motion. 31 in a transport direction T or T.
- the structure and the constituent material (s) of this conveyor belt 31, as well as the dimensions, in particular the length, the width, and the thickness of this conveyor belt 31, are of no importance for the invention. .
- the conveyor belt 31 may for example, and indifferently for the invention, be constituted by a band of impermeable or permeable material (for example textile tape, rubber band, etc.) more or less smooth and more or less thick, or may be constituted by assembled elements of the type chains or articulated links.
- a band of impermeable or permeable material for example textile tape, rubber band, etc.
- the cleaning device 1 is moved, by rolling the mobile carriage 10 on the ground, so as to position the cleaning assembly 1 1 carried by this carriage 10 below the horizontal portion 31b of the lower run of the conveyor belt. 31, which extends between the guide rollers 20, and such that each centering housing 1 10a of this cleaning assembly January 1 is positioned in line with a centering pin 23 of the guide device 2.
- the cleaning assembly 1 1 is moved vertically upwards relative to the carriage 10, so as to put at least one of the centering housings 1 10 in abutment in a centering finger 23.
- the compliments January 1 spring 1 1 a work so that the four centering fingers 23 are in contact with a corresponding conical centering housing 1 10a, the 1 10 being pressed against the cross-rollers 220.
- the springs 1 1 1 a are compressed and exert on the cleaning tank 1 10 a vertical thrust for the plate and maintain support against the roller holder 220, and the centering fingers 23 provide a recovery of the thrust force.
- the portion 31b of the band 31 and the liquid level in the tank 1 10 are perfectly aligned.
- the centering fingers 23 in cooperation with the centering recesses 1 10a thus allow precise positioning of the cleaning assembly 1 1 with respect to the horizontal portion 31b of the lower strand of the conveyor belt 31, which extends between the guide rollers 20.
- compliments 1 1 1 1 spring 1 1 1 a whatever the slope of the ground and / or non-flatness of the soil on which is placed the movable carriage 10 (see Figure 10), when the cleaning assembly 1 1 is in the cleaning position bearing against the roller cross-members 220, the vessel 1 10 is always positioned horizontally, that is to say with its centering housing 1 10a aligned in a plane horizontal, compliments 1 1 1 spring 1 1 1 a allowing self-positioning of the cleaning assembly 1 1 in support against the guide device 2, with the possible automatic compensation of the slope and / or the non-flatness of the ground.
- the positioning which is obtained by means of the centering fingers 23 and the centering recesses 11a, is provided in such a way that in this cleaning position of the cleaning device 1, the lower face 31a of the portion horizontal 31 b of the lower strand of the conveyor belt 31, which extends between the guide rollers 20, is immersed completely in the bath of cleaning liquid contained in the tank 1 10, of a given depth, and for example d a depth of from 1 mm to 3 mm.
- This lower face 31a of the lower strand of the conveyor belt 31 corresponds to the conveying face of the conveyor belt 31, that is to say the face which is intended to be in contact with the products or materials transported by the strand. top of the conveyor belt.
- the horizontal portion 31b of the lower run of the conveyor belt 31, which extends between the guide rollers 20, may be immersed either completely or only partially, the important being that at least the transport face 31 has the conveyor is immersed.
- this positioning can be provided so that the lower face 31 has the lower strand of the conveyor belt 31 is immersed in the bath of cleaning liquid contained in the tank 1 10, but the upper face 31c of this lower strand is not immersed but remains outside the bath cleaning liquid.
- the cleaning of the conveyor belt 31 can then be carried out by moving the conveyor belt 31 in the transport direction T or T '(FIG. in order to scroll it with respect to the cleaning assembly 1 1, and by vibrating the cleaning liquid contained in the tank 1 10 by means of the ultrasonic transducers 1 13.
- the ultrasonic waves (typically in a frequency range between 12 kHz and 1 MHz) successively trigger complex compression and decompression phases, resulting in what is commonly called a cavitation phenomenon.
- Decompression causes the formation of a multitude of microscopic bubbles that then implode violently during the compression phase. This action causes turbulence causing the detachment of contaminants (impurities, soils, organic or biological materials, microorganisms, bacteria, ...) attached to the conveyor belt 31, and in particular (but not exclusively) to the transport face 31a. the lower strand of the conveyor belt immersed in the cleaning liquid bath. The higher the ultrasonic frequency, the finer the cleaning (smaller and more numerous cavitation bubbles).
- the pulsation of the micro-currents generated simultaneously in the cleaning liquid bath ensures the continuous removal of the impurities from the underside 31a immersed in the conveyor belt.
- the bath of liquid in the tank 1 10 may contain agents detergents facilitating the dissolution and dispersion of contaminants and / or disinfecting agents for destroying and / or inhibiting organic or biological contaminants, and in particular microorganisms, bacteria, etc.
- this liquid bath makes it possible to have a cleaning action, not only on the contaminants present on the conveying face of the conveyor belt, but also on the contaminants which may have clung to and / or developed in parts the conveyor belt is difficult to access, in particular when this conveyor belt consists of articulated mechanical elements of the linkage type.
- the cleaning device 1 also comprises scrapers 16a, 116b (FIG. 6) against which the conveyor belt 31 bears when it is stretched, and which makes it possible to mechanically remove by scraping the larger impurities, which adhere to the transport face 31a (bottom face 31a of the lower run of the conveyor belt).
- scrapers 16a, 116b FIG. 6
- doctor blade 16a is oriented such that it allows the conveyor belt 31 to be scraped off when the lower run of the conveyor belt is moved in the direction T
- the scraper 116b is oriented from such that it allows a scraping of the conveyor belt 31 when the lower strand of the conveyor belt 31 is moved in the opposite direction T.
- the removal of the cleaning device 1 is carried out very simply and very rapidly, without the need to stop the conveyor belt 31, by moving vertically downward the cleaning assembly 1 1 relative to the carriage 10, by means of the crank 121, and of a height sufficient to at least completely clear the centering fingers 23 of the centering housing 1 10a, when the return springs 1 1 1 a are completely relaxed. It is then sufficient to roll the truck on the ground to relieve the cleaning device 1 from the bottom of the conveyor 3 advantageously.
- the removal of the cleaning device does not require any intervention on the conveyor 3, and in particular does not require any modification. the tension of the conveyor belt 31.
- the cleaning assembly 1 1 For the cleaning of the cleaning device 1, and more particularly of the cleaning assembly 1 1, including the tank 1 10, the cleaning assembly 1 1 is rotated as shown in FIG. 1 1, and for example a jet of water, which is projected on the cleaning device 1.
- the tilting of the cleaning assembly 1 1 facilitates the flow of contaminated soiled cleaning water to the floor for disposal.
- the invention can be used to clean any type of conveyor belt, used to transport any type of products or materials.
- a preferred, but not exclusive, application of the invention is the cleaning of a conveyor belt, generally used in the food industry, for transporting all types of processed or unprocessed food products or processed or non-processed food materials.
- processed intended for human or animal food, and in particular for a conveyor belt, used in the field of the agri-food industry, or in the field of aquaculture, fishing or farming.
- the reference plane P1 and the centering plane P2 are not necessarily horizontal.
- the first centering means 23 and the second centering means 1 10a are not necessary for the conical fingers and conical housings, but can be replaced anywhere equivalent centering means for positioning the cleaning assembly 1 1 relative to the plane reference P1 of the guide device 2.
- compression spring compliances may not be implemented.
- the cleaning device 1 does not comprise a mobile carriage 10 on which said cleaning assembly 11 would be mounted, and which can be moved freely relative to the conveyor, but the cleaning device 1 can be secured to the conveyor for example, in such a way that the cleaning assembly 11 is for example slidably mounted on rails fixed to the frame of the conveyor, in order to be able to bring the cleaning assembly 11 into the cleaning position with respect to the conveyor belt.
- the cleaning assembly 11 may comprise other additional cleaning means or the ultrasonic cleaning tank may be replaced by other cleaning means.
- These other cleaning means can in particular be chosen from the following list and be put in alone or in combination with each other and possibly in combination with ultrasonic cleaning: rotary brush-type mechanical cleaning device, transmission device for radiation, and for example ultraviolet or infrared radiation, a device for blowing air, steam or a gas and for example an ethylene oxide gas and / or gaseous hydrogen peroxide, and or ozone, device for spraying or spraying a cleaning liquid, device for producing a plasma, heating device, suction cleaning device.
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1658613A FR3055891B1 (fr) | 2016-09-15 | 2016-09-15 | Systeme et procede de nettoyage d'une bande transporteuse, notamment au moyen d'un bain de liquide soumis a des vibrations ultrasonores |
PCT/EP2017/072709 WO2018050587A1 (fr) | 2016-09-15 | 2017-09-11 | Systeme et procede de nettoyage d'une bande transporteuse, notamment au moyen d'un bain de liquide soumis a des vibrations ultrasonores |
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EP3512787A1 true EP3512787A1 (fr) | 2019-07-24 |
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EP17761906.1A Withdrawn EP3512787A1 (fr) | 2016-09-15 | 2017-09-11 | Systeme et procede de nettoyage d'une bande transporteuse, notamment au moyen d'un bain de liquide soumis a des vibrations ultrasonores |
Country Status (3)
Country | Link |
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EP (1) | EP3512787A1 (fr) |
FR (1) | FR3055891B1 (fr) |
WO (1) | WO2018050587A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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IT201600094514A1 (it) * | 2016-09-21 | 2018-03-21 | Cefla Soc Cooperativa | Apparato e metodo per la pulizia e il recupero di vernice in impianti di verniciatura |
MX2019004329A (es) * | 2019-04-12 | 2020-10-13 | Clevot S A De C V | Sistema de limpieza de bandas modulares. |
EP3738909A1 (fr) | 2019-05-17 | 2020-11-18 | Lowtev Technologies | Dispositf de nettoyage d'une bande tranporteuse par immersion dans un bain de liquide soumis a des ondes ultrasonores |
FR3096042B1 (fr) | 2019-05-17 | 2022-07-08 | Cip Systems | Dispositf de nettoyage d’une bande tranporteuse par immersion dans un bain de liquide soumis a des ondes ultrasonores |
FR3096041B1 (fr) | 2019-05-17 | 2022-07-08 | Cip Systems | Dispositf de nettoyage d’une bande tranporteuse par immersion dans un bain de liquide soumis a des ondes ultrasonores |
CN113291751A (zh) * | 2021-05-26 | 2021-08-24 | 湖南工业职业技术学院 | 一种可实现在线清洗的输送带清洗装置 |
WO2023151008A1 (fr) * | 2022-02-11 | 2023-08-17 | 湖北雄志塑胶五金制品有限公司 | Dispositif de nettoyage par ultrasons |
Family Cites Families (4)
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JPH06127665A (ja) * | 1992-10-15 | 1994-05-10 | House Foods Corp | 加熱処理装置のコンベヤベルトの洗浄方法及び装置 |
FR2856997B1 (fr) * | 2003-07-01 | 2006-09-08 | Rotowash | Dispositif de nettoyage et de desinfection d'une bande de transport |
DE102010056082A1 (de) * | 2010-10-22 | 2012-04-26 | Lubing Maschinenfabrik Ludwig Bening Gmbh & Co. Kg | Verfahren zur Reinigung eines Förderers für landwirtschaftliche Produkte und Förderer für landwirtschaftliche Produkte |
DE102012003947A1 (de) * | 2012-02-28 | 2013-08-29 | Mf-Hamburg Maschinen- Und Anlagenbau Gmbh | Waschstation |
-
2016
- 2016-09-15 FR FR1658613A patent/FR3055891B1/fr active Active
-
2017
- 2017-09-11 WO PCT/EP2017/072709 patent/WO2018050587A1/fr unknown
- 2017-09-11 EP EP17761906.1A patent/EP3512787A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR3055891B1 (fr) | 2018-09-14 |
FR3055891A1 (fr) | 2018-03-16 |
WO2018050587A1 (fr) | 2018-03-22 |
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