EP0680387A1 - Silo wall cleaning device - Google Patents

Silo wall cleaning device

Info

Publication number
EP0680387A1
EP0680387A1 EP94904652A EP94904652A EP0680387A1 EP 0680387 A1 EP0680387 A1 EP 0680387A1 EP 94904652 A EP94904652 A EP 94904652A EP 94904652 A EP94904652 A EP 94904652A EP 0680387 A1 EP0680387 A1 EP 0680387A1
Authority
EP
European Patent Office
Prior art keywords
silo
barrel
winches
pulleys
cables
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Withdrawn
Application number
EP94904652A
Other languages
German (de)
French (fr)
Inventor
Joseph Brusseleers
Jan Claes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solvay SA
Original Assignee
Solvay SA
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 Solvay SA filed Critical Solvay SA
Publication of EP0680387A1 publication Critical patent/EP0680387A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays

Definitions

  • the invention relates to the cleaning of silos used for the storage of industrial products such as, for example, sodium carbonate.
  • It relates more particularly to a device for cleaning such a silo.
  • Silos intended for the storage of industrial products must be cleaned periodically.
  • certain industrial products in particular sodium carbonate powder, tend, under the effect of gravity forces, to clump together and form incrustations on the wall of the silo.
  • these incrustations generally tend to amplify over time, so that they reduce, sometimes considerably, the useful capacity of the silos and risk, in the long run, of clogging the withdrawal chutes.
  • a first method used to detach incrus ⁇ tions from the wall of a silo is to break them by means of a percussion tool operated manually. This method involves the presence of an operator inside the silo, which constitutes a danger and is generally prohibited by safety rules, in the case of large silos.
  • a known device designed for this purpose, comprises a metal chassis movable inside the silo and carrying the cutter, the chassis being able to rotate 360 degrees on a circular raceway disposed above an opening.
  • This known device has the advantage of being able to be operated from outside the silo. However, its handling is difficult, its productivity is low and the cutter may also damage the wall of the silo.
  • the invention therefore relates to a device for cleaning the wall of a silo, comprising a compressed air gun which can be moved inside the silo, the barrel being for this purpose suspended on two cables which are fixed respectively on the side and other from its center of gravity and which are respectively connected to two winches, by taking support respectively on two pulleys secured to a chassis which is disposed inside the silo and which is fixed to a turntable, movable on a circular path above a silo opening.
  • the compressed air gun is an apparatus well known in the art, which is designed to project, in a defined direction, a jet of compressed air.
  • the flow rate of the compressed air jet, its temperature and its pressure can be adjusted at will, using a compressor, valves and a pressure reducer, depending on the size of the incrus ⁇ tations to be detached and the nature of these incrustations. In practice, it is possible, for example, to adjust the pressure of the compressed air between 0.4 and 1.5 MPa. Examples of compressed air guns usable in the device according to the invention are described in the above-mentioned AIRNESCO brochure and in document GB-A-686842 (AIRNESCO).
  • the compressed air gun is suspended in the silo by two cables connected respectively to two separate winches.
  • the two cables are fixed to the barrel, respectively on either side of the center of gravity of the barrel.
  • the winches ensure a vertical movement of the barrel inside the silo.
  • the winches being maneuverable separately, they also allow the barrel to rotate 180 degrees in the vertical plane.
  • the chassis and the turntable have the function of orienting the barrel in the horizontal plane.
  • the cables supporting the barrel are supported separately on two separate pulleys of the chassis, so that the movement of the plate on the circular path, generally horizontal, ensures a 360 degree rotation of the chassis and the barrel around an axis vertical.
  • the winches and at least one of the pulleys are preferably arranged in the immediate vicinity of the vertical passing through the center of the above-mentioned circular path.
  • one of the pulleys is mounted at one end of an arrow which is articulated to the chassis, at its other end.
  • the articulation of the boom to the chassis is arranged so as to allow the boom to rotate about a horizontal axis, to move the barrel away from or closer to the wall of the silo.
  • the winches can advantageously be arranged outside the silo and the cables then pass through a central opening of the turntable which, for this purpose, is annular.
  • the compressed air gun comprises a stabilizing mass. Its function is to absorb, by inertia, the feedback of the jet of compressed air on the barrel, so as to reduce the amplitude of the oscillations of the barrel and to stabilize it in the silo.
  • the compressed air cannon carries a television camera, connected to a receiver located outside the silo.
  • the television camera is oriented towards the front of the barrel and it has the function of viewing the front of the incrustation subjected to the jet of compressed air. In this way it allows permanent visual monitoring of the silo wall, which greatly facilitates the operation of the winches and the chassis to modify the position and orientation of the barrel.
  • the device according to the invention is applicable to the cleaning of all silos that have contained an industrial product, for example wheat, coal or ore silos. He finds a particular appli ⁇ cation for removing scale from the silos used to store powdered sodium carbonate.
  • the figure partially shows, in vertical axial section, the upper zone of a silo whose side wall 1 is pierced with a manhole 2 at its upper part.
  • An agglomerate 3 of a solid substance adheres to the wall 1.
  • a device is introduced into the silo, through the manhole 2 the invention.
  • This comprises a rotating annular plate 4 placed on a horizontal circular path 5 formed at the periphery of the manhole 2.
  • the circular path 5 and the tray 4 are arranged to allow the tray to rotate 360 degrees on the circular path 5.
  • the tray 4 carries a frame 6 of metal beams inside the silo.
  • An arrow 7 is articulated to the chassis 6 on a ball joint 8, so that it can pivot in a vertical plane, around a horizontal axis.
  • a pulley 9 is fixed to the free end of the arrow 7 and three coaxial and independent pulleys 10 are fixed to the chassis 6, under the central opening 24 of the annular plate 4.
  • the pulleys 10 are positioned substantially on the passing vertical axis through the center of the circular path 5.
  • the inclination of the arrow 7 is adjusted by means of a cable 18 which is connected, via one of the three pulleys 10 to a winch 19 located outside the silo, above the manhole 2.
  • An arm 11 carrying a compressed air gun 12 and a balancing mass 13, is suspended in the silo, by two cables 14 and 15 which pass through the central opening 24 of the annular plate 4 and are respectively connected to two separate winches 16 and 17 located outside the silo, above the manhole 2, in the immediate vicinity of the vertical axis of the circular path 5.
  • the cables 14 and 15 fixed respectively on either side of the center of gravity of the assembly consisting of the arm 11, of the barrel 12 and of the balancing mass 13. They respectively bear on two of the three pulleys 10, the cable 14 also taking support on the pulley 9.
  • the barrel 12 carries a camera of television 20 oriented towards the front of the barrel.
  • a flexible sheath 21 passing through the opening 24 of the plate 4 is fixed to the arm 11. It contains a conduit for supplying the barrel 12 with compressed air produced by a compressor not shown, located outside the silo.
  • the flexible sheath 21 also contains a cable for connecting the camera 20 to a television receiver, not shown, located outside the silo
  • the barrel 12 is first brought in front of a zone 22 of the agglomerate to be attacked.
  • the plate 4 is properly oriented on the path 5 to bring the barrel into the vertical axial plane of the zone 22 and the winches 16, 17 and 19 are maneuvered to bring the barrel 12 to the level of the zone 22.
  • the winches 16 and 17 it is in particular possible, by means of the winches 16 and 17, to orient the arm 11 so that it occupies a horizontal position (as shown in the figure), a position for which the barrel 12 is directed obliquely towards the bottom or a position for which the barrel is directed obliquely upwards. It is advantageous to be able to orient the barrel 12 obliquely to attack an oblique face of the agglomerate 3 or to clean an inclined face 23 of the wall.
  • the camera 20 makes it possible to easily and precisely find the optimum position of the barrel 12.
  • the barrel 12 When the barrel 12 has reached the appropriate position opposite the agglomerate 3, it is placed in communication with the compressor so as to project a jet of compressed air onto the zone 22 of the agglomerate 3.
  • the camera 20 makes it possible to follow the action of the compressed air jet on the agglomerate. As pieces of the agglomerate 3 detach under the effect of the compressed air jet (which is sent by successive pulses), the position and orientation of the barrel 12 is modified by means of the platform 4 and winches 16, 17 and 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Abstract

A device for cleaning a silo wall (1, 23), including a compressed air gun (12) hung on two cables (14, 15) connected to separate winches (16, 17) and supported by two pulleys (9, 10) that are secured to a frame (6) arranged within the silo and attached to a revolving plate (4) moving on a circular path (5) over a silo opening (2).

Description

Dispositif pour le nettoyage de la paroi d'un silo Device for cleaning the wall of a silo
L'invention concerne le nettoyage des silos servant au stockage de produits industriels tels que, par exemple, du carbo¬ nate de sodium.The invention relates to the cleaning of silos used for the storage of industrial products such as, for example, sodium carbonate.
Elle est plus particulièrement relative à un dispositif pour le nettoyage d'un tel silo.It relates more particularly to a device for cleaning such a silo.
Les silos destinés au stockage des produits industriels doivent être nettoyés périodiquement. C'est ainsi que certains produits industriels, notamment le carbonate de sodium en poudre, ont tendance, sous l'effet des forces de gravité, à s'agglutiner et à former des incrustations sur la paroi du silo. Le cas échéant, ces incrustations ont généralement tendance à amplifier au cours du temps, de sorte qu'elles réduisent, parfois considé¬ rablement, la capacité utile des silos et risquent, à la longue, d'obturer les goulottes de soutirage. Une première méthode utilisée pour détacher des incrus¬ tations de la paroi d'un silo consiste à briser celles-ci au moyen d'un outil de percussion manoeuvré manuellement. Cette méthode implique la présence d'un opérateur à l'intérieur du silo, ce qui constitue un danger et est généralement proscrit par les règles de sécurité, dans le cas de grands silos.Silos intended for the storage of industrial products must be cleaned periodically. Thus certain industrial products, in particular sodium carbonate powder, tend, under the effect of gravity forces, to clump together and form incrustations on the wall of the silo. If necessary, these incrustations generally tend to amplify over time, so that they reduce, sometimes considerably, the useful capacity of the silos and risk, in the long run, of clogging the withdrawal chutes. A first method used to detach incrus¬ tions from the wall of a silo is to break them by means of a percussion tool operated manually. This method involves the presence of an operator inside the silo, which constitutes a danger and is generally prohibited by safety rules, in the case of large silos.
On a aussi proposé de détacher les incrustations au moyen d'une fraise que l'on déplace le long de la paroi. Un dispositif connu, conçu à cet effet, comprend un châssis métallique dépla- çable à l'intérieur du silo et portant la fraise, le châssis pouvant tourner de 360 degrés sur un chemin de roulement circu¬ laire disposé au-dessus d'une ouverture du silo [Brochure NORTHERN VIBRATOR MANUFACTURING LTD, Gyro-Whip Bin Cleaning Systems, Northern Vibrator Mfg Ltd, Georgetown, Ontario, Canada; Brevet GB-2146264 (NORTHERN VIBRATOR Mfg Ltd)]. Ce dispositif connu a l'avantage de pouvoir être manoeuvré de l'extérieur du silo. Son maniement est toutefois difficile, sa productivité est faible et la fraise risque par ailleurs d'endommager la paroi du silo.It has also been proposed to detach the inlays by means of a cutter which is moved along the wall. A known device, designed for this purpose, comprises a metal chassis movable inside the silo and carrying the cutter, the chassis being able to rotate 360 degrees on a circular raceway disposed above an opening. from the silo [NORTHERN VIBRATOR MANUFACTURING LTD brochure, Gyro-Whip Bin Cleaning Systems, Northern Vibrator Mfg Ltd, Georgetown, Ontario, Canada; Patent GB-2146264 (NORTHERN VIBRATOR Mfg Ltd)]. This known device has the advantage of being able to be operated from outside the silo. However, its handling is difficult, its productivity is low and the cutter may also damage the wall of the silo.
Pour éviter les inconvénients liés à l'utilisation d'une fraise, on a songé à détacher les incrustations au moyen d'un canon à air comprimé monté à l'extrémité d'une flèche que l'on manoeuvre manuellement à l'intérieur du silo depuis un trou d'homme pratiqué dans la paroi du silo (Brochure AIRNESCO, Technical Information and Operating Instructions, The Airnesco Bunker lances N2, N3, and N4, Airnesco International Limited, Rochester, Kent, England). Ce moyen connu présente l'incon¬ vénient d'un maniement difficile, imprécis et fatigant. L'invention remédie aux inconvénients précités en fournissant un dispositif nouveau pour le nettoyage des silos, dont le maniement est aisé et précis, qui présente une efficacité et une productivité optimum et avec lequel le risque est minimum d'endommager la paroi du silo.To avoid the drawbacks associated with the use of a cutter, consideration has been given to detaching the incrustations by means of a compressed air cannon mounted at the end of an arrow which is maneuvered manually inside the silo from a manhole in the wall of the silo (AIRNESCO brochure, Technical Information and Operating Instructions, The Airnesco Bunker lances N2, N3, and N4, Airnesco International Limited, Rochester, Kent, England). This known means has the drawback of difficult, imprecise and tiring handling. The invention overcomes the aforementioned drawbacks by providing a new device for cleaning the silos, whose handling is easy and precise, which has optimum efficiency and productivity and with which the risk is minimum of damaging the wall of the silo.
L'invention concerne dès lors un dispositif pour le nettoyage de la paroi d'un silo, comprenant un canon à air comprimé déplaçable à l'intérieur du silo, le canon étant à cet effet suspendu à deux cables qui sont fixés respectivement de part et d'autre de son centre de gravité et qui sont reliés respectivement à deux treuils, en prenant appui respectivement sur deux poulies solidaires d'un châssis qui est disposé à l'intérieur du silo et qui est fixé à un plateau tournant, dépla¬ çable sur un chemin circulaire au-dessus d'une ouverture du silo.The invention therefore relates to a device for cleaning the wall of a silo, comprising a compressed air gun which can be moved inside the silo, the barrel being for this purpose suspended on two cables which are fixed respectively on the side and other from its center of gravity and which are respectively connected to two winches, by taking support respectively on two pulleys secured to a chassis which is disposed inside the silo and which is fixed to a turntable, movable on a circular path above a silo opening.
Dans le dispositif selon l'invention, le canon à air comprimé est un appareil bien connu en technique, qui est conçu pour projeter, dans une direction définie, un jet d'air comprimé. Le débit du jet d'air comprimé, sa température et sa pression peuvent être réglés à volonté, à partir d'un compresseur, de vannes et d'un détendeur, en fonction de l'importance des incrus¬ tations à détacher et de la nature de ces incrustations. En pratique, on peut par exemple régler la pression de l'air comprimé entre 0,4 et 1,5 MPa. Des exemples de canons à air comprimé utilisables dans le dispositif selon l'invention sont décrits dans la brochure AIRNESCO précitée et dans le document GB-A-686842 (AIRNESCO).In the device according to the invention, the compressed air gun is an apparatus well known in the art, which is designed to project, in a defined direction, a jet of compressed air. The flow rate of the compressed air jet, its temperature and its pressure can be adjusted at will, using a compressor, valves and a pressure reducer, depending on the size of the incrus¬ tations to be detached and the nature of these incrustations. In practice, it is possible, for example, to adjust the pressure of the compressed air between 0.4 and 1.5 MPa. Examples of compressed air guns usable in the device according to the invention are described in the above-mentioned AIRNESCO brochure and in document GB-A-686842 (AIRNESCO).
Le canon à air comprimé est suspendu dans le silo par deux câbles reliés respectivement à deux treuils distincts. Les deux cables sont fixés au canon, respectivement de part et d'autre du centre de gravité du canon. Les treuils assurent un déplacement vertical du canon à l'intérieur du silo. Les treuils étant manoeuvrables séparément, ils permettent par ailleurs de faire pivoter le canon de 180 degrés dans le plan vertical.The compressed air gun is suspended in the silo by two cables connected respectively to two separate winches. The two cables are fixed to the barrel, respectively on either side of the center of gravity of the barrel. The winches ensure a vertical movement of the barrel inside the silo. The winches being maneuverable separately, they also allow the barrel to rotate 180 degrees in the vertical plane.
Le châssis et le plateau tournant ont pour fonction d'orienter le canon dans le plan horizontal. A cet effet, les cables supportant le canon prennent appui séparément sur deux poulies distinctes du châssis, de sorte que le déplacement du plateau sur le chemin circulaire, généralement horizontal, assure une rotation de 360 degrés du châssis et du canon autour d'un axe vertical.The chassis and the turntable have the function of orienting the barrel in the horizontal plane. For this purpose, the cables supporting the barrel are supported separately on two separate pulleys of the chassis, so that the movement of the plate on the circular path, generally horizontal, ensures a 360 degree rotation of the chassis and the barrel around an axis vertical.
En combinant la manoeuvre des treuils et la manoeuvre du plateau tournant, il est possible de positionner le canon de manière optimum vis-à-vis d'une incrustation à détacher de la paroi. En outre, par une manoeuvre appropriée des treuils, il est possible d'orienter à volonté l'angle du jet d'air comprimé projeté sur l'incrustation à traiter.By combining the operation of the winches and the operation of the turntable, it is possible to position the barrel optimally with respect to an inlay to be detached from the wall. In addition, by an appropriate operation of the winches, it is possible to orient at will the angle of the jet of compressed air projected on the inlay to be treated.
Dans le dispositif selon l'invention, les treuils et l'une au moins des poulies sont de préférence disposés au voisinage immédiat de la verticale passant par le centre du chemin circu¬ laire précité.In the device according to the invention, the winches and at least one of the pulleys are preferably arranged in the immediate vicinity of the vertical passing through the center of the above-mentioned circular path.
Dans une forme de réalisation particulière du dispositif selon l'invention, l'une des poulies est montée à une extrémité d'une flèche qui est articulée au châssis, à son autre extrémité. Dans cette forme de réalisation de l'invention, l'articulation de la flèche au châssis est agencée de manière à permettre une rotation de la flèche autour d'un axe horizontal, pour éloigner ou rapprocher le canon de la paroi du silo.In a particular embodiment of the device according to the invention, one of the pulleys is mounted at one end of an arrow which is articulated to the chassis, at its other end. In this embodiment of the invention, the articulation of the boom to the chassis is arranged so as to allow the boom to rotate about a horizontal axis, to move the barrel away from or closer to the wall of the silo.
Dans le dispositif selon l'invention et sa forme de réali- sation particulière qui vient d'être décrite, les treuils peuvent avantageusement être disposés à l'extérieur du silo et les câbles traversent alors une ouverture centrale du plateau tournant qui, à cet effet, est annulaire.In the device according to the invention and its particular embodiment which has just been described, the winches can advantageously be arranged outside the silo and the cables then pass through a central opening of the turntable which, for this purpose, is annular.
Dans une autre forme de réalisation du dispositif selon l'invention, le canon à air comprimé comporte une masse stabili- satrice. Celle-ci a pour fonction d'absorber, par inertie, la contre-réaction du jet d'air comprimé sur le canon, de manière à réduire l'amplitude des oscillations du canon et à stabiliser celui-ci dans le silo.In another embodiment of the device according to the invention, the compressed air gun comprises a stabilizing mass. Its function is to absorb, by inertia, the feedback of the jet of compressed air on the barrel, so as to reduce the amplitude of the oscillations of the barrel and to stabilize it in the silo.
Dans une forme de réalisation supplémentaire du dispositif selon l'invention, le canon à air comprimé porte une caméra de télévision, reliée à un récepteur situé à l'extérieur du silo. Dans cette forme de réalisation du dispositif selon l'invention, la caméra de télévision est orientée vers l'avant du canon et elle a pour fonction de visualiser le front de l'incrustation soumise au jet d'air comprimé. Elle permet de la sorte un suivi visuel permanent de la paroi du silo, ce qui facilite grandement la manoeuvre des treuils et du châssis pour modifier la position et l'orientation du canon.In a further embodiment of the device according to the invention, the compressed air cannon carries a television camera, connected to a receiver located outside the silo. In this embodiment of the device according to the invention, the television camera is oriented towards the front of the barrel and it has the function of viewing the front of the incrustation subjected to the jet of compressed air. In this way it allows permanent visual monitoring of the silo wall, which greatly facilitates the operation of the winches and the chassis to modify the position and orientation of the barrel.
Le dispositif selon l'invention est applicable au nettoyage de tous silos ayant contenu un produit industriel, par exemple aux silos à blé, à charbon ou à minerai. Il trouve une appli¬ cation particulière pour la désincrustation des silos ayant servi au stockage de carbonate de sodium en poudre.The device according to the invention is applicable to the cleaning of all silos that have contained an industrial product, for example wheat, coal or ore silos. He finds a particular appli¬ cation for removing scale from the silos used to store powdered sodium carbonate.
Des particularités et détails de l'invention vont ressortir de la description suivante de la figure unique du dessin annexé, qui montre une forme de réalisation préférée du dispositif selon l'invention, en cours d'utilisation dans un silo.Special features and details of the invention will emerge from the following description of the single figure of the accompanying drawing, which shows a preferred embodiment of the device according to the invention, in use in a silo.
La figure montre partiellement, en section axiale verticale, la zone supérieure d'un silo dont la paroi latérale 1 est percée d'un trou d'homme 2 à sa partie supérieure. Un agglomérat 3 d'une substance solide (par exemple du carbonate de sodium) adhère à la paroi 1. Pour détacher l'agglomérat 3 de la paroi, on introduit dans le silo, par le trou d'homme 2, un dispositif conforme à l'invention. Celui-ci comprend un plateau annulaire tournant 4 posé sur un chemin circulaire horizontal 5 ménagé à la périphérie du trou d'homme 2. Le chemin circulaire 5 et le plateau 4 sont agencés pour permettre au plateau une rotation de 360 degrés sur le chemin circulaire 5. Le plateau 4 porte un châssis 6 de poutrelles métalliques à l'intérieur du silo. Une flèche 7 est articulée au châssis 6 sur une rotule 8, de sorte qu'elle puisse pivoter dans un plan vertical, autour d'un axe horizontal. Une poulie 9 est fixée à l'extrémité libre de la flèche 7 et trois poulies coaxiales et indépendantes 10 sont fixées au châssis 6, sous l'ouverture centrale 24 du plateau annulaire 4. Les poulies 10 sont positionnées sensiblement sur l'axe vertical passant par le centre du chemin circulaire 5.The figure partially shows, in vertical axial section, the upper zone of a silo whose side wall 1 is pierced with a manhole 2 at its upper part. An agglomerate 3 of a solid substance (for example sodium carbonate) adheres to the wall 1. To detach the agglomerate 3 from the wall, a device is introduced into the silo, through the manhole 2 the invention. This comprises a rotating annular plate 4 placed on a horizontal circular path 5 formed at the periphery of the manhole 2. The circular path 5 and the tray 4 are arranged to allow the tray to rotate 360 degrees on the circular path 5. The tray 4 carries a frame 6 of metal beams inside the silo. An arrow 7 is articulated to the chassis 6 on a ball joint 8, so that it can pivot in a vertical plane, around a horizontal axis. A pulley 9 is fixed to the free end of the arrow 7 and three coaxial and independent pulleys 10 are fixed to the chassis 6, under the central opening 24 of the annular plate 4. The pulleys 10 are positioned substantially on the passing vertical axis through the center of the circular path 5.
L'inclinaison de la flèche 7 est réglée au moyen d'un câble 18 qui est relié, via une des trois poulies 10 à un treuil 19 situé à l'extérieur du silo, au-dessus du trou d'homme 2.The inclination of the arrow 7 is adjusted by means of a cable 18 which is connected, via one of the three pulleys 10 to a winch 19 located outside the silo, above the manhole 2.
Un bras 11 portant un canon à air comprimé 12 et une masse d'équilibrage 13, est suspendu dans le silo, à deux câbles 14 et 15 qui traversent l'ouverture centrale 24 du plateau annulaire 4 et sont reliés respectivement à deux treuils distincts 16 et 17 situés à l'extérieur du silo, au-dessus du trou d'homme 2, au voisinage immédiat de l'axe vertical du chemin circulaire 5. Les câbles 14 et 15 fixés respectivement de part et d'autre du centre de gravité de l'assemblage constitué du bras 11, du canon 12 et de la masse d'équilibrage 13. Ils prennent respectivement appui sur deux des trois poulies 10, le câble 14 prenant par ailleurs appui sur la poulie 9. Le canon 12 porte une caméra de télé- vision 20 orientée vers l'avant du canon. Une gaine souple 21 traversant l'ouverture 24 du plateau 4 est fixée au bras 11. Elle contient un conduit pour alimenter le canon 12 en air comprimé produit par un compresseur non représenté, situé en dehors du silo. La gaine souple 21 contient en outre un câble de connexion de la caméra 20 à un récepteur de télévision, non représenté, situé à l'extérieur du silo.An arm 11 carrying a compressed air gun 12 and a balancing mass 13, is suspended in the silo, by two cables 14 and 15 which pass through the central opening 24 of the annular plate 4 and are respectively connected to two separate winches 16 and 17 located outside the silo, above the manhole 2, in the immediate vicinity of the vertical axis of the circular path 5. The cables 14 and 15 fixed respectively on either side of the center of gravity of the assembly consisting of the arm 11, of the barrel 12 and of the balancing mass 13. They respectively bear on two of the three pulleys 10, the cable 14 also taking support on the pulley 9. The barrel 12 carries a camera of television 20 oriented towards the front of the barrel. A flexible sheath 21 passing through the opening 24 of the plate 4 is fixed to the arm 11. It contains a conduit for supplying the barrel 12 with compressed air produced by a compressor not shown, located outside the silo. The flexible sheath 21 also contains a cable for connecting the camera 20 to a television receiver, not shown, located outside the silo.
Pour détacher l'agglomérat 3 de la paroi 1 du silo, on amène d'abord le canon 12 en face d'une zone 22 de l'agglomérat à attaquer. A cet effet, on oriente convenablement le plateau 4 sur le chemin 5 pour amener le canon dans le plan axial vertical de la zone 22 et on manoeuvre les treuils 16, 17 et 19 pour amener le canon 12 au niveau de la zone 22. En combinant par ailleurs l'actionnement des treuils 16, 17 et 19, on modifie à volonté la hauteur du canon dans le silo, son écartement par rapport à la paroi et son inclinaison. Il est notamment possible, au moyen des treuils 16 et 17, d'orienter le bras 11 de manière qu'il occupe une position horizontale (telle que repré¬ sentée à la figure), une position pour laquelle le canon 12 est dirigé obliquement vers le bas ou une position pour laquelle le canon est dirigé obliquement vers le haut. Il est intéressant de pouvoir orienter le canon 12 obliquement pour attaquer une face oblique de l'agglomérat 3 ou pour nettoyer une face inclinée 23 de la paroi. La caméra 20 permet de trouver facilement et avec précision la position optimum du canon 12.To detach the agglomerate 3 from the wall 1 of the silo, the barrel 12 is first brought in front of a zone 22 of the agglomerate to be attacked. To this end, the plate 4 is properly oriented on the path 5 to bring the barrel into the vertical axial plane of the zone 22 and the winches 16, 17 and 19 are maneuvered to bring the barrel 12 to the level of the zone 22. By additionally combining the actuation of the winches 16, 17 and 19, the height of the barrel in the silo, its spacing relative to the wall and its inclination are modified as desired. It is in particular possible, by means of the winches 16 and 17, to orient the arm 11 so that it occupies a horizontal position (as shown in the figure), a position for which the barrel 12 is directed obliquely towards the bottom or a position for which the barrel is directed obliquely upwards. It is advantageous to be able to orient the barrel 12 obliquely to attack an oblique face of the agglomerate 3 or to clean an inclined face 23 of the wall. The camera 20 makes it possible to easily and precisely find the optimum position of the barrel 12.
Lorsque le canon 12 a atteint la position adéquate en face de l'agglomérat 3, on le met en communication avec le compresseur de manière à projeter un jet d'air comprimé sur la zone 22 de l'agglomérat 3. La caméra 20 permet de suivre l'action du jet d'air comprimé sur l'agglomérat. Au fur et à mesure que des morceaux de l'agglomérat 3 se détachent sous l'effet du jet d'air comprimé (que l'on envoie par impulsions successives), on modifie la position et l'orientation du canon 12 au moyen du plateau 4 et des treuils 16, 17 et 19.When the barrel 12 has reached the appropriate position opposite the agglomerate 3, it is placed in communication with the compressor so as to project a jet of compressed air onto the zone 22 of the agglomerate 3. The camera 20 makes it possible to follow the action of the compressed air jet on the agglomerate. As pieces of the agglomerate 3 detach under the effect of the compressed air jet (which is sent by successive pulses), the position and orientation of the barrel 12 is modified by means of the platform 4 and winches 16, 17 and 19.
Pour introduire le dispositif dans le silo ou l'en sortir, il suffit de manoeuvrer les treuils 16, 17 et 19 de manière à amener la flèche 7 et le bras 11 dans une position sensiblement verticale, pour permettre leur passage à travers le trou d'homme 2. To introduce the device into or out of the silo, it suffices to maneuver the winches 16, 17 and 19 so as to bring the boom 7 and the arm 11 into a substantially vertical position, to allow their passage through the hole d man 2.

Claims

R E V E N D I C A T I O N SR E V E N D I C A T I O N S
1 - Dispositif pour le nettoyage de la paroi (1, 23) d'un silo, comprenant un canon à air comprimé (12) déplaçable à l'intérieur du silo, caractérisé en ce que le canon (12) est suspendu à deux câbles (14, 15) qui sont fixés respectivement de part et d'autre de son centre de gravité et qui sont reliés respectivement à deux treuils distincts (16, 17), en prenant appui respectivement sur deux poulies (9, 10) solidaires d'un châssis (6) qui est disposé à l'intérieur du silo et qui est fixé à un plateau tournant (4), déplaçable sur un chemin circulaire (5) au-dessus d'une ouverture (2) du silo.1 - Device for cleaning the wall (1, 23) of a silo, comprising a compressed air gun (12) movable inside the silo, characterized in that the barrel (12) is suspended on two cables (14, 15) which are fixed respectively on either side of its center of gravity and which are respectively connected to two separate winches (16, 17), by resting respectively on two pulleys (9, 10) integral with a frame (6) which is arranged inside the silo and which is fixed to a turntable (4), movable on a circular path (5) above an opening (2) of the silo.
2 - Dispositif selon la revendication 1, caractérisé en ce qu'une des poulies précitées (9) est montée à une extrémité d'une flèche (7) qui est articulée, à son autre extrémité (8), au châssis (6).2 - Device according to claim 1, characterized in that one of the above pulleys (9) is mounted at one end of a boom (7) which is articulated, at its other end (8), to the frame (6).
3 - Dispositif selon la revendication 2, caractérisé en ce que la flèche (7) est suspendue à un câble (18) relié à un treuil (19).3 - Device according to claim 2, characterized in that the arrow (7) is suspended from a cable (18) connected to a winch (19).
4 - Dispositif selon la revendication 2 ou 3, caractérisé en ce que les treuils (16, 17, 19) sont situés en dehors du silo, les câbles (14, 15, 18) traversant une ouverture centrale (24) du plateau tournant (4).4 - Device according to claim 2 or 3, characterized in that the winches (16, 17, 19) are located outside the silo, the cables (14, 15, 18) passing through a central opening (24) of the turntable ( 4).
5 - Dispositif selon la revendication 4, caractérisé en ce que les câbles (14, 15, 18) prennent appui sur des poulies (10) solidaires du châssis (6), sous l'ouverture centrale (24) du plateau tournant (4).5 - Device according to claim 4, characterized in that the cables (14, 15, 18) bear on pulleys (10) integral with the chassis (6), under the central opening (24) of the turntable (4) .
6 - Dispositif selon l'une quelconque des revendications 1 à6 - Device according to any one of claims 1 to
5, caractérisé en ce que le canon (12) comprend une masse stabi¬ lisatrice (13).5, characterized in that the barrel (12) comprises a stabilizing mass (13).
7 - Dispositif selon l'une quelconque des revendications 1 à7 - Device according to any one of claims 1 to
6, caractérisé en ce que les treuils (16, 17, 19) sont manoeu¬ vrables individuellement. 8 - Dispositif selon l'une quelconque des revendications 1 à6, characterized in that the winches (16, 17, 19) are individually maneuverable. 8 - Device according to any one of claims 1 to
7, caractérisé en ce que le canon (12) porte une caméra de télé¬ vision (20) reliée à un récepteur situé à l'extérieur du silo.7, characterized in that the barrel (12) carries a tele vision camera (20) connected to a receiver located outside the silo.
9 - Dispositif selon l'une quelconque des revendications 1 à9 - Device according to any one of claims 1 to
8, caractérisé en ce que le silo est destiné à contenir du carb¬ onate de sodium en poudre. 8, characterized in that the silo is intended to contain powdered sodium carbate onate.
EP94904652A 1993-01-12 1994-01-07 Silo wall cleaning device Withdrawn EP0680387A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE9300025 1993-01-12
BE9300025A BE1006611A3 (en) 1993-01-12 1993-01-12 Device for cleaning the wall of a silo.
PCT/EP1994/000062 WO1994015728A1 (en) 1993-01-12 1994-01-07 Silo wall cleaning device

Publications (1)

Publication Number Publication Date
EP0680387A1 true EP0680387A1 (en) 1995-11-08

Family

ID=3886777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94904652A Withdrawn EP0680387A1 (en) 1993-01-12 1994-01-07 Silo wall cleaning device

Country Status (7)

Country Link
US (1) US5594973A (en)
EP (1) EP0680387A1 (en)
JP (1) JPH08506515A (en)
BE (1) BE1006611A3 (en)
BR (1) BR9405805A (en)
CA (1) CA2153703A1 (en)
WO (1) WO1994015728A1 (en)

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Also Published As

Publication number Publication date
WO1994015728A1 (en) 1994-07-21
JPH08506515A (en) 1996-07-16
US5594973A (en) 1997-01-21
BR9405805A (en) 1995-12-12
CA2153703A1 (en) 1994-07-21
BE1006611A3 (en) 1994-11-03

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