EP0908239A1 - Device for removing the residual filter cake layer of a centrifugal drier - Google Patents

Device for removing the residual filter cake layer of a centrifugal drier Download PDF

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Publication number
EP0908239A1
EP0908239A1 EP98420172A EP98420172A EP0908239A1 EP 0908239 A1 EP0908239 A1 EP 0908239A1 EP 98420172 A EP98420172 A EP 98420172A EP 98420172 A EP98420172 A EP 98420172A EP 0908239 A1 EP0908239 A1 EP 0908239A1
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EP
European Patent Office
Prior art keywords
basket
organ
wall
stripping
stripping device
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Withdrawn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
EP98420172A
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German (de)
French (fr)
Inventor
Lionel Birken
Vincent Vitry
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.)
Robatel SLPI SA
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Robatel SLPI SA
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Filing date
Publication date
Application filed by Robatel SLPI SA filed Critical Robatel SLPI SA
Publication of EP0908239A1 publication Critical patent/EP0908239A1/en
Withdrawn legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B04CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04BCENTRIFUGES
    • B04B15/00Other accessories for centrifuges
    • B04B15/06Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like

Definitions

  • the present invention relates to a stripping device allowing to break part or all of a cake retained on the filter media in a basket of centrifugal wringer.
  • this residual layer must be removed because it slows down the subsequent filtration or because the user wishes to recover the entire product or not to mix two batches or two different products.
  • the residual layer can be removed manually using with an appropriate tool. This operation necessarily requires stopping and opening the machine. It can therefore be dangerous for the operator who may come into contact with toxic products or flammable. In addition, the product may deteriorate when placed at the open air. Finally, this technique is long and requires the presence of a operator.
  • wringers allow to debat and unload the whole cake thanks to the only movement of the filter media. It's about for example so-called spin dryers or canvas traction. In both cases, the canvas is heavily stressed, the size of the machines fairly limited and complex mechanisms, therefore expensive.
  • the object of the present invention is to provide a device for clearing overcomes the disadvantages of known devices.
  • the device comprises, on the one hand, several stripping members which, arranged at rest, substantially parallel to the generating the perforated cylindrical wall of the basket and between this wall and the filter media, are angularly spaced, each member being in support by one of its ends on a wall of the basket and being provided, at the other end, of a control means capable of receiving a force longitudinal compression causing, by deformation of the organ, the formation of at least one convex projection locally deforming the media filtering, and secondly, actuation means capable of coming into contact against the control means of each stripping member to move it in the direction of the projection.
  • This device makes it possible to break the residual layer or the cake by exerting on the stripping members, basket stopped or rotating at low speed, a longitudinal force causing them to flex or bend in direction of the central part of the basket.
  • the putting into action of this device is done manually or automatically.
  • each stripping member is associated with a rigid plate which, extending at least over part of the length of this organ, is interposed between this organ and the media filtering.
  • Each rigid plate moves in the same way of a piston under the thrust communicated to it by the defeating.
  • the radial force communicated by this body is substantially the same over the entire length of the rigid plate, or preferably oriented on one side or the other, which favors the breaking of the residual layer or the cake on the entire width of the basket or preferably on one side or the other.
  • Figure 1 is a side view in partial cross section a centrifugal wringer equipped with the device.
  • Figures 2 and 3 are partial views in longitudinal section of a first embodiment of the device when it is respectively in the rest position and in the declutching position.
  • Figures 4 and 5 are partial views in longitudinal section showing another embodiment of the device when it is, respectively, in the rest position and in the declutching position.
  • Figure 6 is a partial view in longitudinal section showing two embodiments of the actuation means of the device.
  • Figure 7 is a perspective view showing a shape particular execution of a filter bag.
  • Figure 8 is a partial view in longitudinal section showing a wringer equipped with the pocket of FIG. 7 when it is at rest.
  • Figure 9 is a partial perspective view of a shape execution of a deformable blade secured to its pin.
  • Figure 10 is a partial view in longitudinal section showing another embodiment in which the rigid plate is integral with the cleaning blade.
  • Figures 11 and 12 are partial views in longitudinal section showing another embodiment of the stripping members.
  • the reference numeral 3 designates a level for a vertical shaft 4, 5 the shaft drive motor and 6 a basket perforated wedged at the end of this shaft and mounted free to rotate in a fixed tank 7, accessible by a door 8.
  • the cylindrical wall 6a of the basket is perforated and is integral with a substantially diametrical wall 6b and a crown border 23.
  • the perforated wall 6a is covered with a filtering medium such a pocket 9, possibly supported by a support fabric 10 (Fig. 2), interposed between it and the perforated wall 6a.
  • Door 8 supports a cane 12 for supplying liquid and solid mixture.
  • the tank 7 is connected to a circuit 14 for collecting the liquid, separated from the solid by centrifugation.
  • the cleaning device according to the invention is composed of several blades 20 arranged parallel to the generators of the basket 6 between the perforated wall 6a and the filtering medium 9 or the support fabric 10, if the basket has one.
  • the different blades are spaced angularly inside the basket, with an angular pitch which is constant, or not.
  • Each blade 20 is preferably made in a elastically deformable material, such as metal or material synthetic.
  • This material can also be non-elastically deformable, case in which it regains its shape by centrifugation, upon rotation from the basket.
  • the width of a blade is generally between 2 and 4 centimeters and its length is substantially equal to that of the basket.
  • the material of the blade is chosen by depending on its chemical resistance to the treated product, this resistance can be increased by depositing a coating on the blade.
  • Each blade 20 is supported by one of its ends, on a wall of the basket, for example on that 6b ensuring the connection of this basket with the rotating shaft 4, while its other end is connected to control means able to communicate a compression force to it longitudinal ensuring its deformation and more precisely its bending in direction of the interior of the basket.
  • the free end of the blade 20 is supported on a cylindrical pin 21, sliding mounted in a bore 22 formed in the crown ring 23.
  • the end of the pin 21 penetrates, at least partially, into a cutout 18 thereof so as to ensure the setting in transverse translation.
  • the edges of cutout 2 are rolled up to form two ears 19 used for fixing a transverse pin 24, which coming to bear against the internal face of the crown ring 23, under the action of the elastic return provided by the blade, limits the stroke in outward translation of this blade. In a variant, this limitation is ensured by a shoulder of the pin 21.
  • the pin 21 In the rest position, the pin 21 is in the position shown in Figure 2 and forms, by its outer end, a projection able to cooperate with actuation means which are described more far.
  • Each blade 20 is advantageously associated with means ensuring its pre-bending, that is to say gives it a convexity turned towards the filter medium 9.
  • these means are constituted by a convex support 25 disposed under each blade and fixed to the perforated wall 6a of the basket. This support extends at least over part of the length of the blade.
  • the means of preflection is constituted by a cleat interposed between the basket and the stripping member, and fixed on this basket or on this member.
  • FIG 8 clearly shows that, for a short stroke of longitudinal movement "L” of the blade, the radial stroke "R", this blade has, in its central part, a greater value.
  • FIG. 4 to 5 The embodiment shown in Figures 4 to 5 is differentiates from the previous one by the means controlling the bending of each blade 20a.
  • the latter are formed, for each blade 20a by a substantially radial pin 29, slidably mounted in a slot longitudinal 30 of the basket.
  • each blade 20 passes through a lumen of the border 23 and forms, by its protruding part of this border, the control means, therefore of bending of this blade.
  • actuating means which can be either manual or automatic.
  • Figure 6 shows in dashed lines that in a form of execution, the actuation means are manual and constituted by a lever 33, removable or fixed. If it is removable, it has, between its ends, a protruding leg by which it can rest on a return of the tank after being introduced into it by the opening of the door. If it is fixed permanently, it is articulated between its ends on a axis 34a carried by a tab 34 projecting from a return 7b from the tank 7.
  • One of its ends 33a is opposite the trajectory circular control means, pins 21 or end 20b of the blade, while its other end 33b constitutes a handle manual operation when moved in the direction of the arrow 36.
  • control means which in the embodiments shown are arranged on the side of door 8, can also be arranged on the side of the wall 7a of the tank 7.
  • the wall 7a of the tank 7 or its door 8 carries cylinders, pneumatic or hydraulic, air bags or other expandable means arranged with the same angular spacing as the pins 21 which their do opposite. So, after positioning the basket so that the pawns are opposite these actuating means, the supply of these cylinders or cushions allows to move the pawns and to control the bending of cleaning blades.
  • cylinders 37 two or more, carried by door 8, by its frame or by the wall 7a, cause the longitudinal displacement a crown 38, arranged opposite the control means 21 or 20b, between a rest position, in which it is at a distance from the control means, and a stripping position, in which it is supported by these means.
  • Cylinders 37 can be pneumatic or hydraulic, consisting of a cushion inflatable or by any other expanding means.
  • the crown 38 is worn by basket 6 with the possibility of longitudinal sliding relative to him.
  • the actuating means which are fixed to the tank 7 or on the door and which, for example, are fitted with rollers coming into contact with the crown, can operate it, even when it is driven in rotation at low speed.
  • each decompression device is associated to a rigid plate 40 which extends at least over part of the length filter media.
  • the rigid plates 40 are fixed in pockets 42 formed on a filter pocket 9a.
  • this filter bag 9a When this filter bag 9a is placed in the perforated basket 6, it is angularly positioned so that each of its blades 40 is in coincidence with a deformable blade 20.
  • each blade 20 urges the rigid plate 40, like a piston, so that the radial force of breaking the cake is distributed almost evenly along the length of the plate 40 and improves the fragmentation of this cake.
  • the pockets 42 can be replaced by passers-by rigid or by any other means ensuring their connection with the pocket 9a.
  • Each plate 40 which is interposed between the member of deflashing 20 and the filtering medium 9a can also, as shown in FIG. 10, be fixed on the organ and in this case on a blade 20c, or on the canvas support 10, if there is one.
  • each stripping member 49 is made up of several elements rigid 50 linked to each other in the manner of a chain and by joints 51a and 51b.
  • the extreme element 50a is linked by its articulation 51a to the wall 6b of the basket, while the other end element 50b is integral with a control means such as a sliding radial pin 29 in a light 30 of the basket 6.
  • the elements are in even number and a joint on two (those 51a) cooperates with guide means in longitudinal translation, such as slides fixed against the wall perforated 6a of the basket.
  • the free joints 51b can be linked to a plate rigid 40. In the rest position, the elements of each member are roughly aligned, as shown in Figure 11. In practice, the joints 51b are always closer to the axis of rotation of the basket than that 51a, so that under the control effort, the elements 50 of each pair move apart to form a projecting angle always towards inside the basket, as shown in figure 12, not outwards.
  • the control means can be any of those described above, namely lever with manual actuation, removable or fixed, cylinder or expansive element, acting directly or by through a crown.
  • the device which has been described can be applied to all cycle centrifuges, with axis of rotation, vertical or horizontal, whether whether or not they have a scraper or a knife, whether they are pocket, bag, canvas turning or pulling.
  • this device makes it possible to break the residual layer, when the scraping is completed.
  • this device makes it possible to break the entire cake and facilitate the unloading.
  • this device implements simple, reliable and inexpensive means and therefore improves considerably the conditions for extracting the cake.

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  • Centrifugal Separators (AREA)

Abstract

Device for unloading a centrifugal dryer where several organs (20) are between the perforated wall (6a) and the filter medium (9), parallel to the wall of the dryer basket (6) when at rest. Each organ presses against the wall at one end and at the other there is a controller (21) which is longitudinally compressed to bend the organ into a convex projection locally deforming the filter medium Each organ is an elastically deformable pre-bent arm which, at rest, has a convexity towards the filter medium, or is a series of rigid elements articulated together to form a chain which is guided in longitudinal movement. The controller is a cylindrical piston sliding in a bore in the wall of the basket, with one end pressing on the free end of the organ and the other outside the basket. The controller is operated by a lever pressing between its ends on the wall of the vessel, with one end on the controller and the other operated manually. Alternatively, the controller is operated by a crown cattied by means of expansion which displace it from a resting position away from the controllers to a point pressing on them. Each unloading organ is associated with a rigid plate extending over at least part of its length, between the organ and the filter medium. Each rigid plate is in a pocket in the filter medium and is fixed to the unloading organ, or is fixed to the retaining net between the unloading organ and the filter medium.

Description

La présente invention est relative à un dispositif de débùtissage permettant de casser une partie ou la totalité d'un gùteau retenu sur le média filtrant d'un panier d'essoreuse centrifuge.The present invention relates to a stripping device allowing to break part or all of a cake retained on the filter media in a basket of centrifugal wringer.

On connaít des dispositifs qui permettent de retirer progressivement le gùteau au moyen de l'élément tranchant d'un racloir ou d'un couteau. Ces dispositifs ne permettent pas d'extraire la totalité du gùteau car l'élément tranchant ne doit pas venir au contact du média filtrant pour ne pas le détériorer. La partie du gùteau demeurant dans le panier aprÚs cette étape est appelée couche résiduelle.We know devices that allow to remove gradually the cake by means of the cutting element of a scraper or with a knife. These devices do not allow the entire cake because the cutting element must not come into contact with the media filter so as not to damage it. The part of the cake remaining in the basket after this step is called residual layer.

De plus en plus frĂ©quemment, cette couche rĂ©siduelle doit ĂȘtre retirĂ©e car elle ralentit la filtration qui suit ou parce que l'utilisateur souhaite rĂ©cupĂ©rer la totalitĂ© du produit ou ne pas mĂ©langer deux lots ou deux produits diffĂ©rents.More and more frequently, this residual layer must be removed because it slows down the subsequent filtration or because the user wishes to recover the entire product or not to mix two batches or two different products.

On connaít déjà des dispositifs qui permettent d'éliminer cette couche résiduelle mais tous présentent des limites ou des défauts importants.We already know devices that eliminate this residual layer but all have limitations or defects important.

La couche rĂ©siduelle peut ĂȘtre retirĂ©e manuellement Ă  l'aide d'un outil appropriĂ©. Cette opĂ©ration nĂ©cessite obligatoirement l'arrĂȘt et l'ouverture de la machine. Elle peut donc s'avĂ©rer dangereuse pour l'opĂ©rateur qui peut entrer en contact avec des produits toxiques ou inflammables. De plus, le produit peut se dĂ©tĂ©riorer lorsqu'il est placĂ© Ă  l'air libre. Enfin, cette technique est longue et impose la prĂ©sence d'un opĂ©rateur.The residual layer can be removed manually using with an appropriate tool. This operation necessarily requires stopping and opening the machine. It can therefore be dangerous for the operator who may come into contact with toxic products or flammable. In addition, the product may deteriorate when placed at the open air. Finally, this technique is long and requires the presence of a operator.

Sans ouverture et sans arrĂȘt de la machine, il est possible de dĂ©bĂątir la couche rĂ©siduelle en projetant un gaz ou liquide sous pression. Cette technique n'est efficace que dans 50 % des cas environ en fonction des caractĂ©ristiques du solide. La projection de liquide prĂ©sente, en plus, le dĂ©savantage de rĂ©introduire du liquide sur le produit essorĂ©. Cette option n'est donc utilisĂ©e que dans quelques cas particuliers. L'utilisation d'accessoires de dĂ©bĂątissage mĂ©canique venant au contact de la toile n'est que trĂšs limitĂ©e car le contact de cette raclette dĂ©tĂ©riore le mĂ©dia filtrant.Without opening and stopping the machine, it is possible to deflate the residual layer by spraying a gas or liquid under pressure. This technique is only effective in about 50% of cases depending characteristics of the solid. Liquid projection also presents the disadvantage of reintroducing liquid onto the wrung product. This option is therefore only used in a few special cases. Use mechanical release accessories coming into contact with the fabric is only very limited because the contact of this squeegee deteriorates the media filtering.

Dans DE-A-35 18 648 et EP 0 648 542, un élément expansif, souple et déformable élastiquement, est intercalé entre la calandre perforée et le média filtrant. Lorsque cet élément souple est mis sous pression, le média filtrant est déplacé, ce qui provoque la destruction du gùteau. Ce dispositif n'est adapté que pour l'élimination de la couche résiduelle. Il est inutilisable avec de nombreux solvants.In DE-A-35 18 648 and EP 0 648 542, an expansive element, flexible and elastically deformable, is interposed between the grille perforated and filter media. When this flexible element is put under pressure, the filter medium is displaced, which destroys the cake. This device is only suitable for removing the layer residual. It cannot be used with many solvents.

Enfin, des essoreuses permettent de débùtir et décharger l'ensemble du gùteau grùce au seul mouvement du média filtrant. Il s'agit par exemple des essoreuses dites à retournement ou à traction de toile. Dans les deux cas, la toile est lourdement sollicitée, la taille des machines assez limitée et les mécanismes complexes, donc coûteux.Finally, wringers allow to debat and unload the whole cake thanks to the only movement of the filter media. It's about for example so-called spin dryers or canvas traction. In both cases, the canvas is heavily stressed, the size of the machines fairly limited and complex mechanisms, therefore expensive.

La présente invention a pour objet de fournir un dispositif de débùtissage remédiant aux inconvénients des dispositifs connus.The object of the present invention is to provide a device for clearing overcomes the disadvantages of known devices.

Le dispositif selon l'invention comprend, d'une part, plusieurs organes de débùtissage qui, disposés au repos, sensiblement parallÚles aux génératrices de la paroi cylindrique perforée du panier et entre cette paroi et le média filtrant, sont espacés angulaire ment, chaque organe étant en appui par l'une de ses extrémités sur une paroi du panier et étant muni, à l'autre extrémité, d'un moyen de commande apte à recevoir un effort longitudinal de compression provoquant, par déformation de l'organe, la formation d'au moins une saillie convexe déformant localement le média filtrant, et d'autre part, des moyens d'actionnement aptes à venir en contact contre le moyen de commande de chaque organe de débùtissage pour le déplacer dans le sens de la formation de la saillie.The device according to the invention comprises, on the one hand, several stripping members which, arranged at rest, substantially parallel to the generating the perforated cylindrical wall of the basket and between this wall and the filter media, are angularly spaced, each member being in support by one of its ends on a wall of the basket and being provided, at the other end, of a control means capable of receiving a force longitudinal compression causing, by deformation of the organ, the formation of at least one convex projection locally deforming the media filtering, and secondly, actuation means capable of coming into contact against the control means of each stripping member to move it in the direction of the projection.

Ce dispositif permet de casser la couche rĂ©siduelle ou le gĂąteau en exerçant sur les organes de dĂ©bĂątissage, panier Ă  l'arrĂȘt ou en rotation Ă  faible vitesse, un effort longitudinal les faisant flĂ©chir ou plier en direction de la partie centrale du panier.This device makes it possible to break the residual layer or the cake by exerting on the stripping members, basket stopped or rotating at low speed, a longitudinal force causing them to flex or bend in direction of the central part of the basket.

Selon les formes d'exécution, la mise en action de ce dispositif s'effectue manuellement ou de maniÚre automatique.According to the embodiments, the putting into action of this device is done manually or automatically.

Avantageusement, à chaque organe de débùtissage est associée une plaque rigide qui, s'étendant au moins sur une partie de la longueur de cet organe, est interposée entre cet organe et le média filtrant.Advantageously, each stripping member is associated with a rigid plate which, extending at least over part of the length of this organ, is interposed between this organ and the media filtering.

Lors du dĂ©bĂątissage, chaque plaque rigide se dĂ©place Ă  la façon d'un piston sous la poussĂ©e qui lui est communiquĂ©e par l'organe de dĂ©bĂątissage. Selon son profil et son mode de fixation, l'effort radial communiquĂ© par cet organe est sensiblement le mĂȘme sur toute la longueur de la plaque rigide, ou orientĂ© prĂ©fĂ©rentiellement d'un cĂŽtĂ© ou de l'autre, ce qui favorise le cassage de la couche rĂ©siduelle ou du gĂąteau sur toute la largeur du panier ou prĂ©fĂ©rentiellement d'un cĂŽtĂ© ou de l'autre.Each rigid plate moves in the same way of a piston under the thrust communicated to it by the defeating. Depending on its profile and its method of attachment, the radial force communicated by this body is substantially the same over the entire length of the rigid plate, or preferably oriented on one side or the other, which favors the breaking of the residual layer or the cake on the entire width of the basket or preferably on one side or the other.

D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant à titre d'exemple plusieurs formes d'exécution du dispositif selon l'invention dans le cas de son application à une essoreuse centrifuge à axe de rotation vertical.Other features and advantages will emerge from the description which follows with reference to the attached schematic drawing representing by way of example several embodiments of the device according to the invention in the case of its application to a centrifugal wringer with vertical axis of rotation.

Figure 1 est une vue de cÎté en coupe transversale partielle d'une essoreuse centrifuge équipée du dispositif.Figure 1 is a side view in partial cross section a centrifugal wringer equipped with the device.

Figures 2 et 3 sont des vues partielles en coupe longitudinale d'une premiÚre forme d'exécution du dispositif lorsqu'il est respectivement en position de repos et en position de débùtissage.Figures 2 and 3 are partial views in longitudinal section of a first embodiment of the device when it is respectively in the rest position and in the declutching position.

Figures 4 et 5 sont des vues partielles en coupe longitudinale montrant une autre forme d'exécution du dispositif lorsqu'il est, respectivement, en position de repos et en position de débùtissage.Figures 4 and 5 are partial views in longitudinal section showing another embodiment of the device when it is, respectively, in the rest position and in the declutching position.

Figure 6 est une vue partielle en coupe longitudinale montrant deux formes d'exécution des moyens d'actionnement du dispositif.Figure 6 is a partial view in longitudinal section showing two embodiments of the actuation means of the device.

Figure 7 est une vue en perspective montrant une forme d'exécution particuliÚre d'une poche filtrante.Figure 7 is a perspective view showing a shape particular execution of a filter bag.

Figure 8 est une vue partielle en coupe longitudinale montrant une essoreuse équipée de la poche de figure 7 lorsqu'elle est au repos.Figure 8 is a partial view in longitudinal section showing a wringer equipped with the pocket of FIG. 7 when it is at rest.

Figure 9 est une vue partielle en perspective d'une forme d'exécution d'une lame déformable solidaire de son pion.Figure 9 is a partial perspective view of a shape execution of a deformable blade secured to its pin.

Figure 10 est une vue partielle en coupe longitudinale montrant une autre forme d'exécution dans laquelle la plaque rigide est solidaire de la lame débùtisseuse.Figure 10 is a partial view in longitudinal section showing another embodiment in which the rigid plate is integral with the cleaning blade.

Figures 11 et 12 sont des vues partielles en coupe longitudinale montrant une autre forme d'exécution des organes de débùtissage.Figures 11 and 12 are partial views in longitudinal section showing another embodiment of the stripping members.

A la figure 1, la référence numérique 3 désigne un palier pour un arbre vertical 4, 5 le moteur d'entraínement de l'arbre et 6 un panier perforé calé à l'extrémité de cette arbre et monté libre en rotation dans une cuve fixe 7, accessible par une porte 8.In FIG. 1, the reference numeral 3 designates a level for a vertical shaft 4, 5 the shaft drive motor and 6 a basket perforated wedged at the end of this shaft and mounted free to rotate in a fixed tank 7, accessible by a door 8.

De façon connue, la paroi cylindrique 6a du panier est perforée et est solidaire d'une paroi sensiblement diamétrale 6b et d'une couronne de bordure 23. La paroi perforée 6a est tapissée par un média filtrant tel qu'une poche 9, éventuellement soutenue par une toile de soutien 10 (Fig. 2), interposée entre elle et la paroi perforée 6a. La porte 8 supporte une canne 12 d'alimentation en mélange liquide et solide. La cuve 7 est raccordé à un circuit 14 de collecte du liquide, séparé du solide par centrifugation.In known manner, the cylindrical wall 6a of the basket is perforated and is integral with a substantially diametrical wall 6b and a crown border 23. The perforated wall 6a is covered with a filtering medium such a pocket 9, possibly supported by a support fabric 10 (Fig. 2), interposed between it and the perforated wall 6a. Door 8 supports a cane 12 for supplying liquid and solid mixture. The tank 7 is connected to a circuit 14 for collecting the liquid, separated from the solid by centrifugation.

Comme montré dans une premiÚre forme d'exécution aux figures 2 et 3, le dispositif de débùtissage selon l'invention est composé de plusieurs lames 20 disposées parallÚlement aux génératrices du panier 6 entre la paroi perforée 6a et le média filtrant 9 ou la toile de soutien 10, si le panier en est équipé. Les différentes lames sont espacées angulairement à l'intérieur du panier, avec un pas angulaire qui est constant, ou non. Chaque lame 20 est, de préférence réalisée dans un matériau élastiquement déformable, tel qu'en métal ou en matiÚre synthétique.As shown in a first embodiment in Figures 2 and 3, the cleaning device according to the invention is composed of several blades 20 arranged parallel to the generators of the basket 6 between the perforated wall 6a and the filtering medium 9 or the support fabric 10, if the basket has one. The different blades are spaced angularly inside the basket, with an angular pitch which is constant, or not. Each blade 20 is preferably made in a elastically deformable material, such as metal or material synthetic.

Ce matĂ©riau peut aussi ĂȘtre dĂ©formable non Ă©lastiquement, cas dans lequel il reprend sa forme par centrifugation, Ă  la remise en rotation du panier.This material can also be non-elastically deformable, case in which it regains its shape by centrifugation, upon rotation from the basket.

La largeur d'une lame est gĂ©nĂ©ralement comprise entre 2 et 4 centimĂštres et sa longueur est sensiblement Ă©gale Ă  celle du panier. Pour certaines applications, le matĂ©riau constitutif de la lame est choisi en fonction de sa rĂ©sistance chimique au produit traitĂ©, cette rĂ©sistance pouvant ĂȘtre accrue par dĂ©pĂŽt d'un revĂȘtement sur la lame.The width of a blade is generally between 2 and 4 centimeters and its length is substantially equal to that of the basket. For some applications, the material of the blade is chosen by depending on its chemical resistance to the treated product, this resistance can be increased by depositing a coating on the blade.

Chaque lame 20 est en appui par l'une de ses extrémités, sur une paroi du panier, par exemple sur celle 6b assurant la liaison de ce panier avec l'arbre rotatif 4, tandis que son autre extrémité est reliée à des moyens de commande aptes à lui communiquer un effort de compression longitudinale assurant sa déformation et plus précisément sa flexion en direction de l'intérieur du panier.Each blade 20 is supported by one of its ends, on a wall of the basket, for example on that 6b ensuring the connection of this basket with the rotating shaft 4, while its other end is connected to control means able to communicate a compression force to it longitudinal ensuring its deformation and more precisely its bending in direction of the interior of the basket.

Dans la forme d'exécution représentée aux figures 2 et 3, l'extrémité libre de la lame 20 est en appui sur un pion cylindrique 21, monté coulissant dans un alésage 22 ménagé dans la couronne de bordure 23.In the embodiment shown in Figures 2 and 3, the free end of the blade 20 is supported on a cylindrical pin 21, sliding mounted in a bore 22 formed in the crown ring 23.

Comme montré plus en détail figure 9, l'extrémité du pion 21 pénÚtre, au moins partiellement, dans une découpe 18 de celle-ci pour en assurer le calage en translation transversale. Dans la forme d'exécution représentée, les bords de la découpe 2 sont enroulés pour former deux oreilles 19 servant à la fixation d'une goupille transversale 24, qui en venant prendre appui contre la face interne de la couronne de bordure 23, sous l'action du rappel élastique assuré par la lame, limite la course en translation vers l'extérieur de cette lame. Dans une variante, cette limitation est assurée par un épaulement du pion 21.As shown in more detail in FIG. 9, the end of the pin 21 penetrates, at least partially, into a cutout 18 thereof so as to ensure the setting in transverse translation. In the form of execution shown, the edges of cutout 2 are rolled up to form two ears 19 used for fixing a transverse pin 24, which coming to bear against the internal face of the crown ring 23, under the action of the elastic return provided by the blade, limits the stroke in outward translation of this blade. In a variant, this limitation is ensured by a shoulder of the pin 21.

En position de repos, le pion 21 est dans la position représentée à la figure 2 et forme, par son extrémité externe, une saillie apte à coopérer avec des moyens d'actionnement qui sont décrits plus loin.In the rest position, the pin 21 is in the position shown in Figure 2 and forms, by its outer end, a projection able to cooperate with actuation means which are described more far.

Chaque lame 20 est avantageusement associée à des moyens assurant son préfléchissement, c'est-à-dire lui donne une convexité tournée en direction du média filtrant 9.Each blade 20 is advantageously associated with means ensuring its pre-bending, that is to say gives it a convexity turned towards the filter medium 9.

Dans la forme d'exécution représentée aux figures 2 et 3, ces moyens sont constitués par un support convexe 25 disposé sous chaque lame et fixé à la paroi perforé 6a du panier. Ce support s'étend au moins sur une partie de la longueur de la lame.In the embodiment shown in Figures 2 and 3, these means are constituted by a convex support 25 disposed under each blade and fixed to the perforated wall 6a of the basket. This support extends at least over part of the length of the blade.

Dans une autre forme d'exécution, non représentée, le moyen de préfléchissement est constitué par un taquet interposé entre la panier et l'organe de débùtissage, et fixé sur ce panier ou sur cet organe.In another embodiment, not shown, the means of preflection is constituted by a cleat interposed between the basket and the stripping member, and fixed on this basket or on this member.

Avec ce dispositif, Ă  la fin de l'opĂ©ration de sĂ©paration du solide et du liquide, et aprĂšs arrĂȘt du panier de la centrifugeuse, il suffit, pour casser le gĂąteau 26 accumulĂ© contre le mĂ©dia filtrant 9, de communiquer Ă  chaque pion 21 un dĂ©placement longitudinal dans le sens de la flĂšche 27 de figure 3, de maniĂšre que, par appui sur l'extrĂ©mitĂ© libre de la lame 20, celle-ci se cintre en formant un ventre convexe qui pousse, Ă  l'intĂ©rieur du panier, la toile de soutien 10 et le mĂ©dia filtrant 9 en contact avec elle et provoque la cassure du gĂąteau 26.With this device, at the end of the separation operation of the solid and liquid, and after stopping the basket of the centrifuge, it suffices, to break the cake 26 accumulated against the filter medium 9, communicate to each pawn 21 a longitudinal movement in the direction of the arrow 27 in FIG. 3, so that, by pressing on the free end blade 20, this bends to form a convex belly which grows, inside the basket, the support fabric 10 and the filter medium 9 in contact with it and causes the cake to break 26.

La figure 8 montre bien que, pour une faible course de déplacement longitudinal "L" de la lame, la course radiale "R", cette lame a, dans sa partie centrale, une valeur plus importante.Figure 8 clearly shows that, for a short stroke of longitudinal movement "L" of the blade, the radial stroke "R", this blade has, in its central part, a greater value.

Lorsque l'effort sur le pion 21 est relùché, l'élasticité de la lame 20 ramÚne la lame et le pion dans leur position initiale de repos. Lors de la remise en route, l'effet centrifuge contribue aussi à ramener l'ensemble à sa position de repos.When the force on pin 21 is released, the elasticity of the blade 20 returns the blade and the pin to their initial rest position. When restart, the centrifugal effect also contributes to bringing the whole to its rest position.

La forme d'exécution représentée aux figures 4 à 5 se différencie de la précédente par les moyens commandant le cintrage de chaque lame 20a. Ces derniers sont constitués, pour chaque lame 20a par un pion sensiblement radial 29, monté coulissant dans une lumiÚre longitudinale 30 du panier.The embodiment shown in Figures 4 to 5 is differentiates from the previous one by the means controlling the bending of each blade 20a. The latter are formed, for each blade 20a by a substantially radial pin 29, slidably mounted in a slot longitudinal 30 of the basket.

L'extrĂ©mitĂ© du pion 29, qui est Ă  l'intĂ©rieur du panier, est munie d'un Ă©paulement 32 par lequel il vient en appui sur l'extrĂ©mitĂ© de la lame 20. L'extrĂ©mitĂ© du pion, qui est extĂ©rieure au panier 6, forme une saillie pouvant ĂȘtre mue par des moyens d'actionnement. ExceptĂ© ces diffĂ©rences, ce dispositif de dĂ©bĂątissage est similaire Ă  celui dĂ©crit prĂ©cĂ©demment.The end of the pin 29, which is inside the basket, is provided a shoulder 32 by which it bears on the end of the blade 20. The end of the pin, which is outside the basket 6, forms a projection can be moved by actuating means. Except these differences, this stripping device is similar to that described previously.

Dans une variante montrée figure 8, l'extrémité libre 20b de chaque lame 20 traverse une lumiÚre de la bordure 23 et forme, par sa partie saillant de cette bordure, le moyen de commande, donc de cintrage de cette lame.In a variant shown in FIG. 8, the free end 20b of each blade 20 passes through a lumen of the border 23 and forms, by its protruding part of this border, the control means, therefore of bending of this blade.

Chacun des dispositifs qui vient d'ĂȘtre dĂ©crit est Ă©galement associĂ© Ă  des moyens d'actionnement, qui peuvent ĂȘtre soit manuels, soit automatiques.Each of the devices which has just been described is also associated with actuating means, which can be either manual or automatic.

La figure 6 montre en traits mixtes que, dans une forme d'exécution, les moyens d'actionnement sont manuels et constitués par un levier 33, amovible ou fixe. S'il est amovible, il comporte, entre ses extrémités, une patte en saillie par laquelle il peut prendre appui sur un retour de la cuve aprÚs avoir été introduit dans celle-ci par l'ouverture de la porte. S'il est fixé à demeure, il s'articule entre ses extrémités sur un axe 34a porté par une patte 34 saillant d'un retour 7b de la cuve 7.Figure 6 shows in dashed lines that in a form of execution, the actuation means are manual and constituted by a lever 33, removable or fixed. If it is removable, it has, between its ends, a protruding leg by which it can rest on a return of the tank after being introduced into it by the opening of the door. If it is fixed permanently, it is articulated between its ends on a axis 34a carried by a tab 34 projecting from a return 7b from the tank 7.

L'une de ses extrémités 33a est en vis-à-vis de la trajectoire circulaire des moyens de commande, pions 21 ou extrémité 20b de la lame, tandis que son autre extrémité 33b constitue une poignée d'actionnement manuel lorsqu'elle est déplacée dans le sens de la flÚche 36.One of its ends 33a is opposite the trajectory circular control means, pins 21 or end 20b of the blade, while its other end 33b constitutes a handle manual operation when moved in the direction of the arrow 36.

En déplaçant le levier dans le sens de la flÚche 36, l'opérateur provoque le fléchissement de la lame 20 et le débùtissage. Cette opération est répétée pour chaque lame ou organe de débùtissage.By moving the lever in the direction of arrow 36, the operator causes deflection of the blade 20 and defatting. This operation is repeated for each blade or stripping member.

Il est prĂ©cisĂ© que les moyens de commande, qui dans les formes d'exĂ©cution reprĂ©sentĂ©es sont disposĂ©s du cĂŽtĂ© de la porte 8, peuvent Ă©galement ĂȘtre disposĂ©s du cĂŽtĂ© de la paroi 7a de la cuve 7.It is specified that the control means, which in the embodiments shown are arranged on the side of door 8, can also be arranged on the side of the wall 7a of the tank 7.

Dans une autre forme d'exĂ©cution, non reprĂ©sentĂ©e, la paroi 7a de la cuve 7 ou sa porte 8 porte des vĂ©rins, pneumatiques ou hydrauliques, des coussins gonflables ou autres moyens expansibles disposĂ©s avec le mĂȘme espacement angulaire que les pions 21 qui leur font vis-Ă -vis. Ainsi, aprĂšs avoir positionnĂ© le panier afin que les pions soient en face de ces moyens d'actionnement, l'alimentation de ces vĂ©rins ou coussins permet de dĂ©placer les pions et de commander le cintrage des lames dĂ©bĂątisseuses.In another embodiment, not shown, the wall 7a of the tank 7 or its door 8 carries cylinders, pneumatic or hydraulic, air bags or other expandable means arranged with the same angular spacing as the pins 21 which their do opposite. So, after positioning the basket so that the pawns are opposite these actuating means, the supply of these cylinders or cushions allows to move the pawns and to control the bending of cleaning blades.

Dans une autre forme d'exécution montrée à la figure 6, des vérins 37, au nombre de deux ou plus, portés par la porte 8, par son encadrement ou par la paroi 7a, provoquent le déplacement longitudinal d'une couronne 38, disposée en vis-à-vis des moyens de commande 21 ou 20b, entre une position de repos, dans laquelle elle est à distance des moyens de commande, et une position de débùtissage, dans laquelle elle est en appui sur ces moyens.In another embodiment shown in Figure 6, cylinders 37, two or more, carried by door 8, by its frame or by the wall 7a, cause the longitudinal displacement a crown 38, arranged opposite the control means 21 or 20b, between a rest position, in which it is at a distance from the control means, and a stripping position, in which it is supported by these means.

Cette solution prĂ©sente l'avantage d'Ă©viter d'avoir Ă  positionner le panier perforĂ© pour rĂ©aliser l'opĂ©ration de dĂ©bĂątissage. Les vĂ©rins 37 peuvent ĂȘtre pneumatiques ou hydrauliques, constituĂ©s par un coussin gonflable ou par toute autre moyen Ă  expansion.This solution has the advantage of avoiding having to position the perforated basket to carry out the cleaning operation. Cylinders 37 can be pneumatic or hydraulic, consisting of a cushion inflatable or by any other expanding means.

Dans une variante non reprĂ©sentĂ©e, la couronne 38 est portĂ©e par le panier 6 avec possibilitĂ© de coulissement longitudinal par rapport Ă  lui. De la sorte, les moyens d'actionnement qui sont fixĂ©s sur la cuve 7 ou sur la porte et qui, par exemple, sont munis de galets venant en contact avec la couronne, peuvent actionner celle-ci, alors mĂȘme qu'elle est entraĂ­nĂ©e en rotation Ă  faible vitesse.In a variant not shown, the crown 38 is worn by basket 6 with the possibility of longitudinal sliding relative to him. In this way, the actuating means which are fixed to the tank 7 or on the door and which, for example, are fitted with rollers coming into contact with the crown, can operate it, even when it is driven in rotation at low speed.

Dans les formes d'exécution décrites ci-dessus, les organes de débùtissage forment, lorsqu'ils sont actionnés, une unique saillie qui déforme le média filtrant sensiblement à mi-longueur de celui-ci. Il en résulte que le gùteau n'est soumis à des efforts suffisants pour le casser que dans sa partie centrale et non sur ses bords.In the embodiments described above, the when they are activated, they form a single projection which deforms the filter media substantially halfway along it. It results that the cake is not subjected to sufficient efforts to break it only in its central part and not on its edges.

Pour remédier à cela, chaque organe de débùtissage est associé à une plaque rigide 40 qui s'étend au moins sur une partie de la longueur du média filtrant.To remedy this, each decompression device is associated to a rigid plate 40 which extends at least over part of the length filter media.

Aux figures 7 et 8, les plaques rigides 40 sont fixées dans des poches 42 formées sur une poche filtrante 9a.In FIGS. 7 and 8, the rigid plates 40 are fixed in pockets 42 formed on a filter pocket 9a.

Lorsque cette poche filtrante 9a est mise en place dans le panier perforé 6, elle est positionnée angulairement de maniÚre que chacune de ses lames 40 soit en coïncidence avec une lame déformable 20. When this filter bag 9a is placed in the perforated basket 6, it is angularly positioned so that each of its blades 40 is in coincidence with a deformable blade 20.

Lors du débùtissage, la déformation de chaque lame 20 sollicite la plaque rigide 40, à la façon d'un piston, de sorte que l'effort radial de cassage du gùteau se répartit à peu prÚs uniformément sur la longueur de la plaque 40 et améliore la fragmentation de ce gùteau.During the defogging, the deformation of each blade 20 urges the rigid plate 40, like a piston, so that the radial force of breaking the cake is distributed almost evenly along the length of the plate 40 and improves the fragmentation of this cake.

Les poches 42 peuvent ĂȘtre remplacĂ©es par des passants rigides ou par tout autre moyen assurant leur liaison avec la poche 9a.The pockets 42 can be replaced by passers-by rigid or by any other means ensuring their connection with the pocket 9a.

Chaque plaque 40 qui est interposĂ©e entre l'organe de dĂ©bĂątissage 20 et le mĂ©dia filtrant 9a peut aussi, comme montrĂ© figure 10, ĂȘtre fixĂ©e sur l'organe et en l'occurrence sur une lame 20c, ou sur la toile de soutien 10, s'il y en a une.Each plate 40 which is interposed between the member of deflashing 20 and the filtering medium 9a can also, as shown in FIG. 10, be fixed on the organ and in this case on a blade 20c, or on the canvas support 10, if there is one.

Dans une autre forme d'exĂ©cution reprĂ©sentĂ© figure 11 et 12, chaque organe de dĂ©bĂątissage 49 est constituĂ© par plusieurs Ă©lĂ©ments rigides 50 liĂ©s les uns aux autres Ă  la façon d'une chaĂ­ne et par des articulations 51a et 51b. L'Ă©lĂ©ment extrĂȘme 50a est liĂ© par son articulation 51a Ă  la paroi 6b du panier, tandis que l'autre Ă©lĂ©ment extrĂȘme 50b est solidaire d'un moyen de commande tel qu'un pion radial 29 coulissant dans une lumiĂšre 30 du panier 6. Les Ă©lĂ©ments sont en nombre pair et une articulation sur deux (celles 51a) coopĂšre avec des moyens de guidage en translation longitudinale, tels que des glissiĂšres fixĂ©es contre la paroi perforĂ©e 6a du panier.In another embodiment shown in FIGS. 11 and 12, each stripping member 49 is made up of several elements rigid 50 linked to each other in the manner of a chain and by joints 51a and 51b. The extreme element 50a is linked by its articulation 51a to the wall 6b of the basket, while the other end element 50b is integral with a control means such as a sliding radial pin 29 in a light 30 of the basket 6. The elements are in even number and a joint on two (those 51a) cooperates with guide means in longitudinal translation, such as slides fixed against the wall perforated 6a of the basket.

Les articulations libres 51b peuvent ĂȘtre liĂ©es Ă  une plaque rigide 40. En position de repos, les Ă©lĂ©ments de chaque organe sont sensiblement alignĂ©s, comme montrĂ© figure 11. En pratique, les articulations 51b sont toujours plus proches de l'axe de rotation du panier que celle 51a, de maniĂšre que sous l'effort de commande, les Ă©lĂ©ments 50 de chaque paire s'Ă©cartent pour former un angle saillant toujours vers l'intĂ©rieur du panier, comme montrĂ© figure 12, et non vers l'extĂ©rieur.The free joints 51b can be linked to a plate rigid 40. In the rest position, the elements of each member are roughly aligned, as shown in Figure 11. In practice, the joints 51b are always closer to the axis of rotation of the basket than that 51a, so that under the control effort, the elements 50 of each pair move apart to form a projecting angle always towards inside the basket, as shown in figure 12, not outwards.

En augmentant le nombre d'éléments composant chaque organe, il est possible d'augmenter le nombre de saillies 53 sollicitant le média filtrant 9 pour faciliter son débùtissage.By increasing the number of elements making up each organ, it is possible to increase the number of projections 53 requesting the filter media 9 to facilitate its defatting.

Les moyens de commande peuvent ĂȘtre l'un quelconque de ceux dĂ©crits prĂ©cĂ©demment, Ă  savoir levier Ă  actionnement manuel, amovible ou fixĂ©, vĂ©rin ou Ă©lĂ©ment expansif, agissant directement ou par l'intermĂ©diaire d'une couronne.The control means can be any of those described above, namely lever with manual actuation, removable or fixed, cylinder or expansive element, acting directly or by through a crown.

Le dispositif qui a Ă©tĂ© dĂ©crit peut ĂȘtre appliquĂ© Ă  toutes les centrifugeuses Ă  cycle, Ă  axe de rotation, vertical ou horizontal, qu'elles aient ou non un racloir ou un couteau, qu'elles soient Ă  poche, Ă  sac, Ă  retournement ou Ă  traction de toile.The device which has been described can be applied to all cycle centrifuges, with axis of rotation, vertical or horizontal, whether whether or not they have a scraper or a knife, whether they are pocket, bag, canvas turning or pulling.

Pour les centrifugeuses équipées d'un racloir ou d'un couteau, ce dispositif permet de casser la couche résiduelle, lorsque le raclage est terminé.For centrifuges equipped with a scraper or a knife, this device makes it possible to break the residual layer, when the scraping is completed.

Pour les centrifugeuses à poche ou à sac, et à retournement de toile, ce dispositif permet de casser l'ensemble du gùteau et de faciliter le déchargement.For pocket or bag centrifuges and with canvas, this device makes it possible to break the entire cake and facilitate the unloading.

Quelque soit son application, ce dispositif met en oeuvre des moyens simples, fiables et peu onéreux et améliore donc considérablement les conditions d'extraction du gùteau.Whatever its application, this device implements simple, reliable and inexpensive means and therefore improves considerably the conditions for extracting the cake.

Claims (12)

Dispositif de débùtissage pour essoreuse centrifuge dans laquelle le gùteau est retenu par un média filtrant (9) tapissant au moins la partie perforée (6a) d'un panier rotatif (6), caractérisé en ce qu'il comprend : d'une part, plusieurs organes de débùtissage (20, 49) qui, disposés au repos, sensiblement parallÚlement aux génératrices de la paroi perforée (6a) du panier (6) et entre cette paroi et le média filtrant (9), sont espacés angulairement, chaque organe (20,49) étant en appui par l'une de ses extrémités sur une paroi du panier (6) et étant muni, à l'autre extrémité, d'un moyen de commande (21, 29) apte à recevoir un effort longitudinal de compression provoquant, par déformation de l'organe (20, 49), la formation d'au moins une saillie convexe déformant localement le média filtrant (9), et d'autre part, des moyens d'actionnement (33,37) aptes à venir en contact contre le moyen de commande (21, 29) de chaque organe de débùtissage (20, 49) pour le déplacer dans le sens de la formation de la saillie. Deconstructing device for a centrifugal wringer in which the cake is retained by a filtering medium (9) lining at least the perforated part (6a) of a rotating basket (6), characterized in that it comprises: on the one hand, several stripping members (20, 49) which, arranged at rest, substantially parallel to the generatrices of the perforated wall (6a) of the basket (6) and between this wall and the filtering medium (9), are spaced angularly, each member (20,49) being supported by one of its ends on a wall of the basket (6) and being provided, at the other end, with a control means (21, 29) capable of receiving a longitudinal compression force causing, by deformation of the member (20, 49), the formation of at least one convex projection locally deforming the filtering medium (9), and on the other hand, actuating means (33,37) able to come into contact against the control means (21, 29) of each stripping member (20, 49) to move it in the direction of formation of the projection. Dispositif de débùtissage selon la revendication 1, caractérisé en ce que chaque organe de débùtissage est constitué par une lame déformable (20) qui est associée à des moyens de préfléchissement (25) lui procurant, au repos, une convexité tournée en direction du média filtrant (9).A stripping device according to claim 1, characterized in that each stripping member is constituted by a deformable blade (20) which is associated with pre-bending means (25) providing it, at rest, a convexity turned towards the media filter (9). Dispositif de débùtissage selon la revendication 2, caractérisé en ce que la lame (20) est réalisée en matériau déformable élastiquement.A stripping device according to claim 2, characterized in that the blade (20) is made of deformable material elastically. Dispositif de débùtissage selon la revendication 1, caractérisé en ce que chaque organe de débùtissage (49) est constitué par plusieurs éléments rigides (50) articulés les uns aux autres, à la façon d'une chaíne et par des articulations (51a et 51b) dont une sur deux est guidée en translation longitudinale par rapport au panier, alors que les autres articulations (51b) sont libres, cet organe (49) pouvant occuper une position de repos, dans laquelle ses éléments rigides (50) sont sensiblement alignés contre la paroi cylindrique du panier, et une position de débùtissage, dans laquelle chaque paire d'éléments (50) forme un angle en saillie. A stripping device according to claim 1, characterized in that each stripping member (49) consists of several rigid elements (50) articulated to each other, in the manner of a chain and by joints (51a and 51b) of which one in two is guided in longitudinal translation relative to the basket, while the other joints (51b) are free, this member (49) being able to occupy a rest position, in which its rigid elements (50) are substantially aligned against the cylindrical wall of the basket, and a position in which each pair of elements (50) forms an angle projecting. Dispositif de débùtissage selon la revendication 1, caractérisé en ce que les moyens de commande sont constitués, pour chaque organe de débùtissage (20, 49), par un pion cylindrique (21) monté coulissant dans une alésage (22), ménagé dans une paroi (23 ou 6b) du panier (6) et dont une extrémité dépasse de cette paroi, tandis que l'autre extrémité est en appui sur l'extrémité libre de l'organe (20, 49) ou est liée à cette organe.A stripping device according to claim 1, characterized in that the control means are constituted, for each stripping member (20, 49), by a cylindrical pin (21) slidably mounted in a bore (22), formed in a wall (23 or 6b) of the basket (6) and one end of which protrudes from this wall, while the other end is supported on the free end of the member (20, 49) or is linked to this organ. Dispositif de débùtissage selon la revendication 1, caractérisé en ce que les moyens de commande de chaque organe (20, 49) sont constitués par un pion sensiblement radial (29), monté coulissant dans une lumiÚre longitudinale (30) du panier (6) et dont une extrémité est située à l'intérieur du panier et est en appui sur l'extrémité libre de l'organe (20, 49), ou est liée à cette extrémité, tandis que son autre extrémité fait saillie à l'extérieur du panier (6).A stripping device according to claim 1, characterized in that the control means of each member (20, 49) are constituted by a substantially radial pin (29), mounted slidingly in a longitudinal opening (30) of the basket (6) and one end of which is located inside the basket and is supported on the free end of the organ (20, 49), or is linked to this end, while its other end protrudes outside the basket (6). Dispositif de débùtissage selon la revendication 1, caractérisé en ce que les moyens d'actionnement agissant sur les moyens de commande de chaque organe (20, 49) sont constitués par un levier (33)amovible ou fixe, prenant appui entre ses deux extrémités, sur une paroi de la cuve (7) et comportant une extrémité (33a) disposée en vis-à-vis du moyen de commande (21, 29) et une autre extrémité (33b) munie d'une poignée d'actionnement manuel.A stripping device according to claim 1, characterized in that the actuating means acting on the means for controlling each member (20, 49) are constituted by a lever (33) removable or fixed, supported between its two ends, on a wall of the tank (7) and having one end (33a) arranged opposite control means (21, 29) and another end (33b) provided a manual actuation handle. Dispositif de débùtissage selon la revendication 1, caractérisé en ce que les moyens d'actionnement sont constitués par une couronne (38) qui, disposée en vis-à-vis des moyens de commande (21), est portée par des moyens à expansion (37) aptes à la déplacer entre une position de repos, dans laquelle elle est à distance des moyens de commande, et une position de débùtissage, dans laquelle elle est en appui sur ces moyens (20, 49) pour provoquer la déformation des organes de débùtissage.A stripping device according to claim 1, characterized in that the actuation means consist of a crown (38) which, disposed opposite the control means (21), is carried by expansion means (37) capable of moving it between a rest position, in which it is remote from the means of control, and a declutching position, in which it is in abutment on these means (20, 49) to cause the deformation of the organs of defeating. Dispositif de débùtissage selon la revendication 1, caractérisé en ce que à chaque organe de débùtissage (20, 49) est associée une plaque rigide (40) qui, s'étendant au moins sur une partie de la longueur de cet organe, est interposée entre cet organe et le média filtrant (9, 9a). A stripping device according to claim 1, characterized in that at each stripping member (20, 49) is associated with a rigid plate (40) which, extending at least over part of the length of this organ, is interposed between this organ and the media filter (9, 9a). Dispositif de débùtissage selon la revendication 9, caractérisé en ce que chaque plaque rigide (40) est disposée dans une poche (42) ménagée sur le média filtrant (9a).A stripping device according to claim 9, characterized in that each rigid plate (40) is arranged in a pocket (42) formed on the filter medium (9a). Dispositif de débùtissage selon la revendication 9, caractérisé en ce que chaque plaque rigide 40 est fixée sur l'organe de débùtissage (20, 49).A stripping device according to claim 9, characterized in that each rigid plate 40 is fixed to the member clearing (20, 49). Dispositif de débùtissage selon la revendication 9, caractérisé en ce que chaque plaque rigide (40) est fixée sur la toile de soutien (10) interposée entre l'organe débùtisseur (20, 49) et le média filtrant (9, 9a).A stripping device according to claim 9, characterized in that each rigid plate (40) is fixed to the canvas support (10) interposed between the deconstructor (20, 49) and the media filter (9, 9a).
EP98420172A 1997-10-13 1998-10-02 Device for removing the residual filter cake layer of a centrifugal drier Withdrawn EP0908239A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9713001A FR2769522B1 (en) 1997-10-13 1997-10-13 LOWERING DEVICE FOR CENTRIFUGAL SPINNER
FR9713001 1997-10-13

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EP0908239A1 true EP0908239A1 (en) 1999-04-14

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EP98420172A Withdrawn EP0908239A1 (en) 1997-10-13 1998-10-02 Device for removing the residual filter cake layer of a centrifugal drier

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US (1) US6047835A (en)
EP (1) EP0908239A1 (en)
FR (1) FR2769522B1 (en)

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Publication number Priority date Publication date Assignee Title
KR102504657B1 (en) * 2019-11-18 2023-02-27 ìŁŒì‹íšŒì‚Ź 엘지화학 Pressurizing centrifugal dehydrator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8533546U1 (en) * 1985-11-28 1986-02-27 DĂŒrr-Dental GmbH & Co KG, 7120 Bietigheim-Bissingen Drum for a solid bowl centrifuge
DE3518648A1 (en) * 1985-05-23 1986-11-27 Werner Prof. Dr. 6740 Landau Stahl Apparatus for detaching a filter cake
EP0648542A1 (en) * 1993-10-13 1995-04-19 Robatel Sealed elastically deformable device for removing the residual filter cake layer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5607588A (en) * 1995-02-28 1997-03-04 Peterson; John G. Scraper for scraping filter cake from moving filter medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518648A1 (en) * 1985-05-23 1986-11-27 Werner Prof. Dr. 6740 Landau Stahl Apparatus for detaching a filter cake
DE8533546U1 (en) * 1985-11-28 1986-02-27 DĂŒrr-Dental GmbH & Co KG, 7120 Bietigheim-Bissingen Drum for a solid bowl centrifuge
EP0648542A1 (en) * 1993-10-13 1995-04-19 Robatel Sealed elastically deformable device for removing the residual filter cake layer

Also Published As

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US6047835A (en) 2000-04-11
FR2769522A1 (en) 1999-04-16
FR2769522B1 (en) 1999-12-31

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