EP1759769B1 - Filtering device comprising a porous web and at least two maintaning extension hoops - Google Patents

Filtering device comprising a porous web and at least two maintaning extension hoops Download PDF

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Publication number
EP1759769B1
EP1759769B1 EP06356105A EP06356105A EP1759769B1 EP 1759769 B1 EP1759769 B1 EP 1759769B1 EP 06356105 A EP06356105 A EP 06356105A EP 06356105 A EP06356105 A EP 06356105A EP 1759769 B1 EP1759769 B1 EP 1759769B1
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EP
European Patent Office
Prior art keywords
basket
hoops
strapping
intended
hoop
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EP06356105A
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German (de)
French (fr)
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EP1759769A1 (en
Inventor
Lionel Birken
Pascal Sartori
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B7/00—Elements of centrifuges
    • B04B7/08—Rotary bowls
    • B04B7/12—Inserts, e.g. armouring plates
    • B04B7/16—Sieves or filters

Definitions

  • the present invention relates to a filtration device intended to be arranged in a wringer with a basket.
  • the chemical and pharmaceutical industry routinely uses wringers, to separate during a manufacturing process, a solid phase of a liquid phase.
  • a wringer comprises in particular a basket comprising a perforated wall of cylindrical shape in which are formed holes for the passage of the liquid, and two end walls, called edge and plate, perpendicular to the axis of the cylinder formed by the perforated wall cylindrical.
  • This basket is rotated about the axis of the cylindrical wall in order to centrifugally drive the liquid to the outside of the basket.
  • a filter cloth is used to retain the solid particles and allow the liquid to pass through its mesh, the filtering cloth being placed in contact with the cylindrical wall of the basket.
  • the fabric may be metallic in some applications, but it is most often synthetic material, usually polypropylene.
  • the canvas is in the form of a rectangle, which must be wrapped in the basket, in the form of a cylinder.
  • the height of the basket is generally substantially equal to the radius.
  • the width of the canvas rectangle is therefore approximately equal to the height of the basket, its length at the perimeter of the basket.
  • FIG. figure 1 In order to achieve the attachment of the fabric in the basket, it is known, according to a first possibility, as shown in FIG. figure 1 , to use a basket 2 having two grooves 3, 4, formed in the basket 2, on its end walls 5, 6 near the two edges of the perforated wall 7, in which the fabric 8 is fixed by the intermediate braids or ropes 9, 10, in particular being made of cotton, polypropylene, PTFE or elastomer, forced into the two grooves 3, 4 and blocking the fabric.
  • the intermediate braids or ropes 9, 10 in particular being made of cotton, polypropylene, PTFE or elastomer
  • This second possibility makes it possible to simplify the assembly with respect to the first possibility.
  • this second possibility has the following drawbacks: the metal strapping represent a significant cost, and deform if they are bent with a radius of curvature too low, for example when introduced into the basket.
  • this type of assembly requires the presence of rounded grooves formed on the basket, and the positioning of the straps facing these grooves is sometimes difficult.
  • Loops are sometimes sewn along the two long sides of the canvas, so you can slip a strapping inside. The assembly is then easier, but the other disadvantages remain.
  • the rounded grooves may not be sufficient, and the strapping easily out of their location.
  • rims of rectangular section are used, to facilitate slightly the positioning.
  • the end pieces are no longer screwed or unscrewed against each other, but consist respectively of a male rack-and-pinion jaw and a female rack-and-pinion jaw.
  • All these metal strapping, and particularly round section strapping, can not be used on a basket originally intended for an assembly with braids, because the throats are of different shape and size, and are placed differently. New grooves could be machined, but the strength of the basket would then be seriously reduced, posing a significant risk of rupture.
  • the document DE 29 38 684 has a filtration device in which a filter cloth is fixed in the basket by means of rigid metal hoops independent of the fabric.
  • rigid metal hoops can not be reduced to a diameter smaller than that of the basket of the filter device, without risk of irreversible deformation.
  • the fabric may slip under the straps during operation of the filtration device.
  • the object of the present invention is to provide a filtering device intended to be arranged in a wringer with a basket, the fixing is simplified, does not require the use of grooves and can be used with different types of basket , without risk of slipping of the canvas.
  • the subject of the present invention is a filtering device intended to be arranged in a wringer comprising a basket comprising a perforated wall allowing the passage of liquid, intended to be rotated in order to centrifugally drive the liquid towards the drum.
  • a flexible filter cloth intended to be applied against the perforated wall of the basket, characterized in that it further comprises at least two flexible strapping integral with the fabric, and to maintain it in position in Cart, the device comprising at least a plurality of attachment points between the fabric and the straps holding the straps in place relative to the fabric to prevent any relative movement of the fabric and the strapping whether or not the fabric is fixed in the basket.
  • the fastening of the canvas and flexible strapping allows to enter directly into the basket, by winding it on a small diameter, which allows a quick installation of the filter cloth.
  • this fastening prevents slippage of the fabric relative to the strapping.
  • the good tension of filter cloth obtained thanks to the integral strapping allows scraping as close as possible to the filter cloth.
  • This device can be used with all types of known basket with grooves.
  • Each device can be delivered ready for use at the user, eliminating the need for a cut to be made on site that can leave son of the fabric may be mixed with the product to be separated.
  • the canvases are reusable, unlike canvases mounted with braids.
  • the flexible strapping is welded, polyfused or glued on the fabric at several points or continuously.
  • the flexible strapping is made of plastic.
  • plastic strapping can be rolled on a smaller diameter than the basket, without the risk of irreversible deformation,
  • the set is disposable, so there is no risk of cross-contamination between two products.
  • each of the ends of a strapping is respectively equipped with tensioning means, in particular by screwing, the tensioning means of the two ends being intended to cooperate to achieve tensioning of the strapping.
  • the device comprises transverse reinforcements connecting the at least two hoops.
  • the device further comprises at least one metal strapping intended to bear on a flexible strapping.
  • At least one flexible strapping includes a groove for receiving the metal strapping.
  • the device comprises a draining grid intended to be arranged between the filter cloth and the perforated wall of the basket, fixed by two connecting elements to two secondary hoops.
  • the secondary strapping comprises at their ends a substantially sealed connection.
  • the figure 1 is a schematic sectional view of a device of the prior art comprising grooves and braids mounted in force.
  • the figure 2 is a schematic sectional view of a device of the prior art comprising grooves and metal hoops.
  • the figure 3 is a schematic view of the device, seen from the front, according to a first embodiment.
  • the figure 4 is a schematic view of the means of tensioning the device of figure 3 , seen in section perpendicular to the plane of the filter cloth.
  • the figure 5 is a schematic view of the means of tensioning the device of figure 3 , seen in section parallel to the plane of the filter cloth.
  • the figure 6 is a schematic view of the means of tensioning the device of figure 3 , seen in section perpendicular to the plane of the filter cloth, according to an alternative embodiment.
  • the figure 7 is a schematic view of the means of tensioning the device of figure 3 , seen in section perpendicular to the plane of the filter cloth, according to another embodiment.
  • the figure 8 is a schematic sectional view of the filtration device positioned in a wringer basket.
  • the figure 9 is a schematic view of the device, seen from the front, according to a second embodiment.
  • the figure 10 is a schematic view, in section perpendicular to the plane of the filter cloth, of the drainage means associated with the filtration device.
  • the figure 11 is a partial front view of the drainage means of figure 10 .
  • the figure 12 is a schematic view of the device, seen from the front, according to a third embodiment.
  • the flexible straps 18, 19 are welded or polyfused on the fabric 17 at several points or continuously, on the two long sides of the fabric 17, which has, unfolded, a rectangular shape.
  • Flexible strapping 18, 19 may in particular be made of plastic, for example polypropylene type when the filter cloth is itself made of polypropylene.
  • the rings 18, 19 are formed by profiles forming strips a few millimeters thick and a few centimeters wide.
  • the small thickness of the straps 18, 19 allows the filtering device 16 to maintain flexibility to match the curvature of the basket 2.
  • the straps 18, 19 are glued, screwed, sewn, nested, pinched on the filter cloth 17.
  • a combination of these modes of attachment could also be used.
  • Each strapping 18, 19 comprises an end 20 located at the edge of a first small side of the rectangle formed by the fabric 17, and a second end 22 set back from the edge of a second small side of the rectangle formed by the fabric 17.
  • Each of the ends 20, 22 of a strapping 18, 19 is respectively equipped with tensioning means 23, 24, the tensioning means 23, 24 of the two ends being intended to cooperate to achieve tensioning of the strapping 18, 19, the tensioning being carried out by means of one or two screws.
  • the tensioning means 23, arranged at a first end 20 of the strapping 18 are constituted by a tip or a screw 25, located in the axis of the strapping 18 whose body is threaded and cooperates with the tapping of a tip intermediate 26 itself assembled by screws 27 on the profile 18.
  • the head of the screw 25 comprises holes opening 28 laterally, offset by 90 °, for screwing and unscrewing the screw 25 relative to the intermediate nozzle 26.
  • the head of the screw comprises a concave front face 29 intended to cooperate with the convex front face 32 of a screw 30 of the complementary tensioning means 24 disposed on the second end 22 of the strapping 18.
  • These tensioning means 24 have the same characteristics as the means 23 located on the first end 20 of the strapping 18 outside the convex shape of the end face 32 of the screw 30.
  • the tapping of the intermediate tip 26 is made in a metal insert 33 of the intermediate tip 26, so as to allow better holding of the screw.
  • the tensioning means 23, 24 can be directly attached to the strapping 18, as shown in FIG. figure 6 if the strapping 18 has a sufficient thickness, compatible with the stress of flexibility, the metal insert 33 being directly fixed in the strapping. No intermediate tip is then used.
  • an end piece 34 is fitted on the strapping 18, this end piece having no metal insert.
  • an intermediate nozzle may be in particular fixed by welding, gluing, casing, polyfusion on the strapping.
  • the strapping used to fix the fabric may not include tensioning means, each of the two ends of the strapping then coming into contact with one of the other through a cutout or coupling of the male / female type.
  • This type of cutting is particularly represented in figure 11 , as detailed below.
  • the optional intermediate end may be made of the same plastic as the strapping or other plastic or metal material.
  • the device 35 comprises, in addition to the elements of the first embodiment, transverse reinforcements 36 connecting the two hoops, along the generatrices of the basket, to stiffen the assembly, and prevent the two hoops 18, 19 from approaching each other. one of the other.
  • These reinforcements 36 are fixed, according to different variants by welding, sewing, gluing, interlocking.
  • These reinforcements 36 are particularly useful in the case where the tightening performed by the operator is insufficient.
  • the device is delivered to the user's installation site rolled up to a diameter of approximately 40 to 50 cm, depending on the size of the fabric and the rigidity of the straps 18, 19.
  • the fabric is unfolded in the basket 2, then is applied by hand against the perforated wall 7 of the basket.
  • the screws or endpieces 25, 30 of each strapping 18, 19 being screwed completely, they are brought into contact one against the other, then a first strapping 18 is positioned correctly in the first angle of the basket 2, before being weakly energized.
  • the screws or end pieces of the second strapping are positioned in the second angle of the basket 2, before being weakly put in tension also.
  • the straps are spread apart as much as possible, so as to tension the web 17.
  • the screws or end pieces 25, 30 are then unscrewed to the maximum, in order to block the fabric 17 in this configuration, as shown on the figure 8 .
  • the complete assembly lasts, according to an exemplary embodiment, between 5 and 10 minutes.
  • the straps 18, 19 constitute an extra thickness with respect to the fabric 17. When a scraper is used, it must be kept at a minimum distance of 12 mm from the fabric.
  • the two angles of the scraper, opposite the strapping can be cut, so as to scrape much closer to the canvas. It is thus possible to reduce the residual layer of solid material remaining at the end of scraping to 8 or even 5 mm, against 10 or 15 mm currently.
  • the device comprises a draining grid 37, represented on the Figures 10 and 11 installed under the filter cloth 17, allowing the liquid to drain under the filter cloth, to the holes of the perforated basket.
  • the grid can not be easily welded to a plastic strapping, the two large edges of the rectangular grid are each assembled on a strip of tissue 38 or a very thin strip of plastic. Each strip is then assembled, in particular by welding, polyfusion, gluing or screwing to a plastic strapping 39.
  • a male / female cutout 40 is made at each end, which is particularly visible on the figure 11 .
  • the assembly thus formed is simply deposited in the basket. It is then the straps 18, 19 of the device 16, 35 which bear on it and hold it in place.
  • the device further comprises elements of the first embodiment, two metal strapping 45 intended to bear on the two flexible strapping 43 fixed on the cloth 42, each flexible strapping 43 comprising a groove 44 intended to receive the metal strapping 45.

Landscapes

  • Filtration Of Liquid (AREA)
  • Filtering Materials (AREA)
  • Centrifugal Separators (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The device (16) has a filtering sheet (17) applied against a perforated wall of a basket. Two plastic flexible strappings (18, 19) are integrated to the sheet (17) and maintain the sheet in position in the basket. Fixation points between the sheet and strappings maintain the strappings in position with respect to the sheet to avoid all relative movement of the sheet and the strappings irrespective of the fixation in the basket.

Description

La présente invention concerne un dispositif de filtration destiné à être disposé dans une essoreuse comportant un panier.The present invention relates to a filtration device intended to be arranged in a wringer with a basket.

L'industrie chimique et pharmaceutique utilise de façon courante des essoreuses, pour séparer lors d'un procédé de fabrication, une phase solide d'une phase liquide.The chemical and pharmaceutical industry routinely uses wringers, to separate during a manufacturing process, a solid phase of a liquid phase.

Une essoreuse comprend notamment un panier comportant une paroi perforée de forme cylindrique dans laquelle sont ménagés des trous permettant le passage du liquide, ainsi que deux parois d'extrémités, appelées bordure et plateau, perpendiculaires à l'axe du cylindre formé par la paroi perforée cylindrique. Ce panier est entraîné en rotation autour de l'axe de la paroi cylindrique afin d'entraîner par centrifugation le liquide vers l'extérieur du panier.A wringer comprises in particular a basket comprising a perforated wall of cylindrical shape in which are formed holes for the passage of the liquid, and two end walls, called edge and plate, perpendicular to the axis of the cylinder formed by the perforated wall cylindrical. This basket is rotated about the axis of the cylindrical wall in order to centrifugally drive the liquid to the outside of the basket.

Les particules de la phase solide comprenant souvent des éléments de taille inférieure à 100 µm, une toile filtrante est utilisée pour retenir les particules solides et laisser passer le liquide à travers ses mailles, la toile filtrante étant disposée au contact de la paroi cylindrique du panier.Since the particles of the solid phase often comprise elements smaller than 100 μm, a filter cloth is used to retain the solid particles and allow the liquid to pass through its mesh, the filtering cloth being placed in contact with the cylindrical wall of the basket. .

La toile peut être métallique dans certaines applications, mais elles est le plus souvent en matériau synthétique, généralement en polypropylène.The fabric may be metallic in some applications, but it is most often synthetic material, usually polypropylene.

Les essoreuses dites à déchargement automatique comprennent en particulier un racloir ou un couteau, permettant de racler les accumulations de phase solide au contact de la paroi. Ce type d'essoreuse requiert donc que la toile filtrante soit appliquée contre la paroi perforée du panier, si possible sans le moindre pli.Spinners known as automatic unloading include in particular a scraper or a knife, for scraping the solid phase accumulations in contact with the wall. This type of wringer therefore requires that the filter cloth is applied against the perforated wall of the basket, if possible without the slightest crease.

La toile se présente sous la forme d'un rectangle, qu'il faut enrouler dans le panier, sous la forme d'un cylindre. La hauteur du panier est en général sensiblement égale au rayon. La largeur du rectangle de toile est donc égale approximativement à la hauteur du panier, sa longueur au périmètre du panier.The canvas is in the form of a rectangle, which must be wrapped in the basket, in the form of a cylinder. The height of the basket is generally substantially equal to the radius. The width of the canvas rectangle is therefore approximately equal to the height of the basket, its length at the perimeter of the basket.

Afin de réaliser la fixation de la toile dans le panier, il est connu, selon une première possibilité, ainsi que représenté sur la figure 1, d'utiliser un panier 2 comportant deux gorges 3, 4, ménagées dans le panier 2, sur ses paroi d'extrémités 5, 6 à proximité des deux bords de la paroi perforée 7, dans lesquels la toile 8 est fixée par l'intermédiaire de tresses ou cordes 9, 10, pouvant notamment être réalisées en coton, polypropylène, PTFE ou élastomère, rentrées en force dans les deux gorges 3, 4 et bloquant la toile.In order to achieve the attachment of the fabric in the basket, it is known, according to a first possibility, as shown in FIG. figure 1 , to use a basket 2 having two grooves 3, 4, formed in the basket 2, on its end walls 5, 6 near the two edges of the perforated wall 7, in which the fabric 8 is fixed by the intermediate braids or ropes 9, 10, in particular being made of cotton, polypropylene, PTFE or elastomer, forced into the two grooves 3, 4 and blocking the fabric.

Ce montage bien qu'efficace dure plusieurs heures, et est fastidieux, car l'opérateur est agenouillé dans un endroit peu accessible ou penché la tête en bas dans le panier pour réaliser ce montage, en particulier car l'opérateur doit monter en force les tresses, tout en garantissant que sur la périphérie du panier l'orientation des bords de la toile reste perpendiculaire à l'axe A de la paroi cylindrique du panier.This assembly, although effective, lasts several hours, and is tedious because the operator is kneeling in an inaccessible place or tilted upside down in the basket to achieve this assembly, in particular because the operator must force the braids, while ensuring that on the periphery of the basket the orientation of the edges of the fabric remains perpendicular to the axis A of the cylindrical wall of the basket.

Selon une deuxième possibilité, ainsi que représenté sur la figure 2, il est connu de fixer la toile en utilisant des cerclages métalliques 12, 13 de section ronde, destinés à être positionnés en regard de gorges 14, 15 ménagées dans le panier 2, au niveau des bords de la paroi perforée cylindrique 7. Ces cerclages 12, 13 sont roulés au diamètre du panier 2 et les deux extrémités de chaque cerclage 12, 13 sont prévues pour venir en contact l'une contre l'autre. A ces deux extrémités sont vissés deux embouts permettant de régler le diamètre du cerclage. Ces deux embouts sont d'abord vissés de façon à obtenir un diamètre minimum pour la mise en place, puis dévissés au maximum pour augmenter le diamètre du cerclage et bloquer la toile filtrante entre le cerclage et la paroi perforée du panier, au niveau des gorges.According to a second possibility, as represented on the figure 2 , it is known to fix the fabric using metal rims 12, 13 of round section, intended to be positioned opposite grooves 14, 15 formed in the basket 2, at the edges of the cylindrical perforated wall 7. These strapping 12, 13 are rolled to the diameter of the basket 2 and the two ends of each strapping 12, 13 are provided to come into contact one against the other. At these two ends are screwed two end pieces to adjust the diameter of the strapping. These two tips are first screwed so as to obtain a minimum diameter for the establishment, then unscrewed to the maximum to increase the diameter of the strapping and block the filter cloth between the strapping and the perforated wall of the basket, at the grooves .

Cette deuxième possibilité permet de simplifier le montage par rapport à la première possibilité.This second possibility makes it possible to simplify the assembly with respect to the first possibility.

Toutefois, cette deuxième possibilité présente les inconvénients suivants : les cerclages métalliques représentent un coût important, et se déforment s'ils sont pliés avec un rayon de courbure trop faible, par exemple lors de leur introduction dans le panier. En outre, ce type de montage nécessite la présence de gorges arrondies ménagées sur le panier, et le positionnement des cerclages en regard de ces gorges est parfois difficile.However, this second possibility has the following drawbacks: the metal strapping represent a significant cost, and deform if they are bent with a radius of curvature too low, for example when introduced into the basket. In addition, this type of assembly requires the presence of rounded grooves formed on the basket, and the positioning of the straps facing these grooves is sometimes difficult.

Des boucles sont parfois cousues le long des deux grands côtés de la toile, de façon à pouvoir glisser un cerclage à l'intérieur. Le montage est alors plus facile, mais les autres inconvénients demeurent.Loops are sometimes sewn along the two long sides of the canvas, so you can slip a strapping inside. The assembly is then easier, but the other disadvantages remain.

De plus, les gorges arrondies peuvent ne plus être suffisantes, et les cerclages sortent facilement de leur emplacement.In addition, the rounded grooves may not be sufficient, and the strapping easily out of their location.

Selon une troisième possibilité, des cerclages de section rectangulaire sont utilisés, permettant de faciliter légèrement le positionnement.According to a third possibility, rims of rectangular section are used, to facilitate slightly the positioning.

Selon une variante de cette troisième possibilité, les embouts ne sont plus vissés ou dévissés l'un contre l'autre, mais constitués respectivement d'une mâchoire à crémaillère mâle, et d'une mâchoire à crémaillère femelle.According to a variant of this third possibility, the end pieces are no longer screwed or unscrewed against each other, but consist respectively of a male rack-and-pinion jaw and a female rack-and-pinion jaw.

Tous ces cerclages métalliques, et particulièrement les cerclages de section ronde, ne peuvent être utilisés sur un panier prévu à l'origine pour un montage avec des tresses, car les gorges sont de forme et de dimension différentes, et sont placées différemment. De nouvelles gorges pourraient être usinées, mais la résistance du panier serait alors gravement amoindrie, faisant courir un risque important de rupture.All these metal strapping, and particularly round section strapping, can not be used on a basket originally intended for an assembly with braids, because the throats are of different shape and size, and are placed differently. New grooves could be machined, but the strength of the basket would then be seriously reduced, posing a significant risk of rupture.

Le document DE 29 38 684 présente un dispositif de filtration dans lequel une toile filtrante est fixée dans le panier par l'intermédiaire de cerclages métalliques rigides, indépendants de la toile.The document DE 29 38 684 has a filtration device in which a filter cloth is fixed in the basket by means of rigid metal hoops independent of the fabric.

La fixation de la toile par l'intermédiaire de cerclages rigides indépendants oblige l'opérateur à insérer d'abord la toile, puis à venir placer séparément les cerclages.Fixing the fabric through independent rigid strapping forces the operator to insert the canvas first, then to come separately place the strapping.

En outre, les cerclages métalliques rigides ne peuvent pas être ramenés à un diamètre inférieur à celui du panier du dispositif de filtration, sans risque de déformation irréversible.In addition, rigid metal hoops can not be reduced to a diameter smaller than that of the basket of the filter device, without risk of irreversible deformation.

Enfin, la toile risque de glisser sous les cerclages lors du fonctionnement du dispositif de filtration.Finally, the fabric may slip under the straps during operation of the filtration device.

En conséquence, le but de la présente invention est de fournir un dispositif de filtration destiné à être disposé dans une essoreuse comportant un panier, dont la fixation est simplifiée, ne nécessitant pas l'utilisation de gorges et pouvant être utilisé avec différents types de panier, sans risque de glissement de la toile.Accordingly, the object of the present invention is to provide a filtering device intended to be arranged in a wringer with a basket, the fixing is simplified, does not require the use of grooves and can be used with different types of basket , without risk of slipping of the canvas.

A cet effet, la présente invention a pour objet un dispositif de filtration destiné à être disposé dans une essoreuse comportant un panier comprenant une paroi perforée permettant le passage de liquide, destiné à être entraîné en rotation afin d'entraîner par centrifugation le liquide vers l'extérieur du panier, comportant une toile filtrante souple destinée à être appliquée contre la paroi perforée du panier, caractérisé en ce qu'il comporte en outre au moins deux cerclages souples solidaires de la toile, et permettant de maintenir celle-ci en position dans le panier,
le dispositif comprenant au moins une pluralité de points de fixation entre la toile et les cerclages maintenant en position les cerclages par rapport à la toile pour empêcher tout mouvement relatif de la toile et des cerclages, que la toile soit fixée ou non dans le panier.For this purpose, the subject of the present invention is a filtering device intended to be arranged in a wringer comprising a basket comprising a perforated wall allowing the passage of liquid, intended to be rotated in order to centrifugally drive the liquid towards the drum. outside the basket, comprising a flexible filter cloth intended to be applied against the perforated wall of the basket, characterized in that it further comprises at least two flexible strapping integral with the fabric, and to maintain it in position in Cart,
the device comprising at least a plurality of attachment points between the fabric and the straps holding the straps in place relative to the fabric to prevent any relative movement of the fabric and the strapping whether or not the fabric is fixed in the basket.

Ces dispositions permettent de fixer une toile filtrante dans un panier d'essoreuse, de façon rapide, en quelques minutes seulement, sans utiliser des gorges. Une seule personne suffit pour fixer le dispositif.These provisions allow to fix a filter cloth in a basket of wringer, quickly, in minutes, without using grooves. Only one person is enough to fix the device.

La solidarisation de la toile et des cerclages souples permet de pouvoir entrer directement l'ensemble dans le panier, en l'enroulant sur un petit diamètre, ce qui permet une installation rapide de la toile filtrante.The fastening of the canvas and flexible strapping allows to enter directly into the basket, by winding it on a small diameter, which allows a quick installation of the filter cloth.

En outre, cette solidarisation permet d'éviter le glissement de la toile par rapport aux cerclages.In addition, this fastening prevents slippage of the fabric relative to the strapping.

La bonne tension de toile filtrante obtenue grâce aux cerclages solidaires permet un raclage au plus près de la toile filtrante.The good tension of filter cloth obtained thanks to the integral strapping allows scraping as close as possible to the filter cloth.

Ces dispositions permettent d'utiliser le dispositif avec un panier ne comprenant pas de gorge, ce qui permet de prévoir une faible course pour les moyens de mise en tension, et de supprimer la nécessité de prévoir des surépaisseurs sur les parois perforées des paniers, ce qui réduit le coût des paniers.These arrangements make it possible to use the device with a basket that does not include a groove, which makes it possible to provide a short stroke for the tensioning means, and to eliminate the need to provide extra thicknesses on the perforated walls of the baskets. which reduces the cost of the baskets.

Ce dispositif peut être utilisé avec tous les types de panier connus comportant des gorges.This device can be used with all types of known basket with grooves.

Chaque dispositif peut être livré prêt à l'emploi chez l'utilisateur, supprimant la nécessité d'une découpe à faire sur place pouvant laisser des fils de la toile susceptibles d'être mélangés avec le produit à séparer.Each device can be delivered ready for use at the user, eliminating the need for a cut to be made on site that can leave son of the fabric may be mixed with the product to be separated.

Les toiles sont réutilisables, contrairement aux toiles montées avec des tresses.The canvases are reusable, unlike canvases mounted with braids.

Avantageusement, les cerclages souples sont soudés, polyfusés ou collés sur la toile en plusieurs points ou en continu.Advantageously, the flexible strapping is welded, polyfused or glued on the fabric at several points or continuously.

Avantageusement, les cerclages souples sont réalisés en matière plastique.Advantageously, the flexible strapping is made of plastic.

Contrairement aux cerclages métalliques, les cerclages en matière plastique peuvent être enroulés sur un plus petit diamètre que le panier, sans risque de déformation irréversible, L'ensemble est jetable, il n'existe donc pas de risque de contamination croisée entre deux produits.Unlike metal strapping, plastic strapping can be rolled on a smaller diameter than the basket, without the risk of irreversible deformation, The set is disposable, so there is no risk of cross-contamination between two products.

Selon un mode de réalisation, chacune des extrémités d'un cerclage est respectivement équipée de moyens de mise en tension, notamment par vissage, les moyens de mise en tension des deux extrémités étant destinés à coopérer pour réaliser la mise en tension du cerclage.According to one embodiment, each of the ends of a strapping is respectively equipped with tensioning means, in particular by screwing, the tensioning means of the two ends being intended to cooperate to achieve tensioning of the strapping.

Préférentiellement, les moyens de mise en tension coopèrent avec :

  • un insert métallique disposé à chaque extrémité du cerclage ou
  • un embout intermédiaire, fixé sur chaque extrémité du cerclage et comprenant ou non un insert métallique.
Preferably, the tensioning means cooperate with:
  • a metal insert disposed at each end of the strapping or
  • an intermediate tip, fixed on each end of the strapping and optionally comprising a metal insert.

Avantageusement, le dispositif comporte des renforts transversaux reliant les au moins deux cerclages.Advantageously, the device comprises transverse reinforcements connecting the at least two hoops.

Selon un mode de réalisation, le dispositif comprend en outre au moins un cerclage métallique destiné à prendre appui sur un cerclage souple.According to one embodiment, the device further comprises at least one metal strapping intended to bear on a flexible strapping.

Avantageusement, au moins un cerclage souple comprend une gorge destinée à recevoir le cerclage métallique.Advantageously, at least one flexible strapping includes a groove for receiving the metal strapping.

Selon un mode de réalisation, le dispositif comporte une grille drainante, destinée à être disposée entre la toile filtrante et la paroi perforée du panier, fixée par deux éléments de liaison à deux cerclages secondaires.According to one embodiment, the device comprises a draining grid intended to be arranged between the filter cloth and the perforated wall of the basket, fixed by two connecting elements to two secondary hoops.

Avantageusement, les cerclages secondaires comprennent à leurs extrémités une liaison sensiblement étanche.Advantageously, the secondary strapping comprises at their ends a substantially sealed connection.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant à titre d'exemple non limitatif, plusieurs modes de réalisation d'un dispositif selon l'invention.In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing, representing by way of nonlimiting example, several embodiments of a device according to the invention.

La figure 1 est une vue en coupe schématique d'un dispositif de l'art antérieur comprenant des gorges et des tresses montées en force.The figure 1 is a schematic sectional view of a device of the prior art comprising grooves and braids mounted in force.

La figure 2 est une vue en coupe schématique d'un dispositif de l'art antérieur comprenant des gorges et des cerclages métalliques.The figure 2 is a schematic sectional view of a device of the prior art comprising grooves and metal hoops.

La figure 3 est une vue schématique du dispositif, vu de face, selon un premier mode de réalisation.The figure 3 is a schematic view of the device, seen from the front, according to a first embodiment.

La figure 4 est une vue schématique des moyens de mise en tension du dispositif de figure 3, vus en coupe perpendiculairement au plan de la toile filtrante.The figure 4 is a schematic view of the means of tensioning the device of figure 3 , seen in section perpendicular to the plane of the filter cloth.

La figure 5 est une vue schématique des moyens de mise en tension du dispositif de figure 3, vus en coupe parallèlement au plan de la toile filtrante.The figure 5 is a schematic view of the means of tensioning the device of figure 3 , seen in section parallel to the plane of the filter cloth.

La figure 6 est une vue schématique des moyens de mise en tension du dispositif de figure 3, vus en coupe perpendiculairement par rapport au plan de la toile filtrante, selon une variante de réalisation.The figure 6 is a schematic view of the means of tensioning the device of figure 3 , seen in section perpendicular to the plane of the filter cloth, according to an alternative embodiment.

La figure 7 est une vue schématique des moyens de mise en tension du dispositif de figure 3, vus en coupe perpendiculairement par rapport au plan de la toile filtrante, selon une autre variante de réalisation.The figure 7 is a schematic view of the means of tensioning the device of figure 3 , seen in section perpendicular to the plane of the filter cloth, according to another embodiment.

La figure 8 est une vue schématique en coupe du dispositif de filtration positionné dans un panier d'essoreuse.The figure 8 is a schematic sectional view of the filtration device positioned in a wringer basket.

La figure 9 est une vue schématique du dispositif, vu de face, selon un second mode de réalisation.The figure 9 is a schematic view of the device, seen from the front, according to a second embodiment.

La figure 10 est une vue schématique, en coupe perpendiculairement au plan de la toile filtrante, des moyens de drainage associés au dispositif de filtration.The figure 10 is a schematic view, in section perpendicular to the plane of the filter cloth, of the drainage means associated with the filtration device.

La figure 11 est une vue partielle de face des moyens de drainage de figure 10.The figure 11 is a partial front view of the drainage means of figure 10 .

La figure 12 est une vue schématique du dispositif, vu de face, selon un troisième mode de réalisation.The figure 12 is a schematic view of the device, seen from the front, according to a third embodiment.

Selon un premier mode de réalisation, représenté sur les figures 3 à 8, un dispositif de filtration 16 selon l'invention destiné à être disposé dans une essoreuse comportant un panier 2, comporte :

  • une toile filtrante 17 destinée à être appliquée contre la paroi cylindrique 7 du panier 2, et
  • au moins deux cerclages souples 18, 19 fixés sur la toile 17, et permettant de maintenir celle-ci en position dans le panier 2.
According to a first embodiment, represented on the Figures 3 to 8 , a filtration device 16 according to the invention intended to be arranged in a wringer comprising a basket 2, comprises:
  • a filter cloth 17 intended to be applied against the cylindrical wall 7 of the basket 2, and
  • at least two flexible rings 18, 19 fixed on the fabric 17, and to maintain it in position in the basket 2.

Les cerclages souples 18, 19 sont soudés ou polyfusés sur la toile 17 en plusieurs points ou en continu, sur les deux grands côtés de la toile 17, qui présente, dépliée, une forme rectangulaire.The flexible straps 18, 19 are welded or polyfused on the fabric 17 at several points or continuously, on the two long sides of the fabric 17, which has, unfolded, a rectangular shape.

Les cerclages souples 18, 19, peuvent être notamment réalisés en matière plastique, par exemple de type polypropylène lorsque la toile filtrante est elle-même en polypropylène.Flexible strapping 18, 19 may in particular be made of plastic, for example polypropylene type when the filter cloth is itself made of polypropylene.

Les cerclages 18, 19 sont constitués par des profilés formant des bandes de quelques millimètres d'épaisseur et de quelques centimètres de largeur.The rings 18, 19 are formed by profiles forming strips a few millimeters thick and a few centimeters wide.

La faible épaisseur des cerclages 18, 19 permet au dispositif de filtration 16 de conserver une souplesse permettant d'épouser la courbure du panier 2.The small thickness of the straps 18, 19 allows the filtering device 16 to maintain flexibility to match the curvature of the basket 2.

Selon des variantes, les cerclages 18, 19 sont collés, vissés, cousus, emboîtés, pincés sur la toile filtrante 17. Une combinaison de ces modes de fixation pourrait aussi être utilisée.According to variants, the straps 18, 19 are glued, screwed, sewn, nested, pinched on the filter cloth 17. A combination of these modes of attachment could also be used.

Chaque cerclage 18, 19 comprend une extrémité 20 située au bord d'un premier petit côté du rectangle formé par la toile 17, et une seconde extrémité 22 située en retrait du bord d'un second petit côté du rectangle formé par la toile 17.Each strapping 18, 19 comprises an end 20 located at the edge of a first small side of the rectangle formed by the fabric 17, and a second end 22 set back from the edge of a second small side of the rectangle formed by the fabric 17.

Chacune des extrémités 20, 22 d'un cerclage 18, 19 est respectivement équipée de moyens de mise en tension 23, 24, les moyens de mise en tension 23, 24 des deux extrémités étant destinés à coopérer pour réaliser la mise en tension du cerclage 18, 19, la mise en tension étant réalisée par l'intermédiaire d'une ou de deux vis.Each of the ends 20, 22 of a strapping 18, 19 is respectively equipped with tensioning means 23, 24, the tensioning means 23, 24 of the two ends being intended to cooperate to achieve tensioning of the strapping 18, 19, the tensioning being carried out by means of one or two screws.

Ainsi que représenté sur les figures 4 et 5, les moyens de mise en tension 23, disposés à une première extrémité 20 du cerclage 18 sont constitués par un embout ou une vis 25, situé dans l'axe du cerclage 18 dont le corps est fileté et coopère avec le taraudage d'un embout intermédiaire 26 lui-même assemblé par des vis 27 sur le profilé 18.As shown on the Figures 4 and 5 , the tensioning means 23, arranged at a first end 20 of the strapping 18 are constituted by a tip or a screw 25, located in the axis of the strapping 18 whose body is threaded and cooperates with the tapping of a tip intermediate 26 itself assembled by screws 27 on the profile 18.

La tête de la vis 25 comprend des trous débouchant 28 latéraux, décalés de 90°, permettant de visser et dévisser la vis 25 par rapport à l'embout intermédiaire 26.The head of the screw 25 comprises holes opening 28 laterally, offset by 90 °, for screwing and unscrewing the screw 25 relative to the intermediate nozzle 26.

La tête de la vis comporte une face frontale concave 29, destinée à coopérer avec la face frontale convexe 32 d'une vis 30 des moyens de mise en tension 24 complémentaires disposés sur la seconde extrémité 22 du cerclage 18. Ces moyens de mise en tension 24 présentent en dehors de la forme convexe de la face frontale 32 de la vis 30 les mêmes caractéristiques que les moyens 23 situés sur la première extrémité 20 du cerclage 18.The head of the screw comprises a concave front face 29 intended to cooperate with the convex front face 32 of a screw 30 of the complementary tensioning means 24 disposed on the second end 22 of the strapping 18. These tensioning means 24 have the same characteristics as the means 23 located on the first end 20 of the strapping 18 outside the convex shape of the end face 32 of the screw 30.

Avantageusement, le taraudage de l'embout intermédiaire 26 est réalisé dans un insert métallique 33 de l'embout intermédiaire 26, de façon à permettre une meilleure tenue de la vis.Advantageously, the tapping of the intermediate tip 26 is made in a metal insert 33 of the intermediate tip 26, so as to allow better holding of the screw.

Selon une variante représentée à la figure 6, Les moyens de mise en tension 23, 24 peuvent être directement fixés sur le cerclage 18, ainsi que représenté à la figure 6, si le cerclage 18 présente une épaisseur suffisante, compatible avec la contrainte de souplesse, l'insert métallique 33 étant directement fixé dans le cerclage. Aucun embout intermédiaire n'est alors utilisé.According to a variant represented in figure 6 , The tensioning means 23, 24 can be directly attached to the strapping 18, as shown in FIG. figure 6 if the strapping 18 has a sufficient thickness, compatible with the stress of flexibility, the metal insert 33 being directly fixed in the strapping. No intermediate tip is then used.

Selon une autre variante représentée à la figure 7, un embout 34 est emboîté sur le cerclage 18, cet embout ne comportant pas d'insert métallique.According to another variant represented in figure 7 , an end piece 34 is fitted on the strapping 18, this end piece having no metal insert.

Selon d'autres variantes, un embout intermédiaire peut être notamment fixé par soudage, collage, emboîtage, polyfusion sur le cerclage.According to other variants, an intermediate nozzle may be in particular fixed by welding, gluing, casing, polyfusion on the strapping.

Enfin, selon une autre variante, les cerclages servant à la fixation de la toile pourraient ne pas comporter de moyens de mise en tension, chacune des deux extrémités du cerclage venant alors en contact l'une de l'autre par l'intermédiaire d'une découpe ou d'un accouplement de type mâle/femelle. Ce type de découpe est notamment représenté en figure 11, comme cela est détaillé ci-après.Finally, according to another variant, the strapping used to fix the fabric may not include tensioning means, each of the two ends of the strapping then coming into contact with one of the other through a cutout or coupling of the male / female type. This type of cutting is particularly represented in figure 11 , as detailed below.

L'embout intermédiaire éventuel peut être réalisé dans la même matière plastique que le cerclage ou dans un autre matériau plastique ou métallique.The optional intermediate end may be made of the same plastic as the strapping or other plastic or metal material.

Compte tenu de la faible course nécessaire, il est possible de ne prévoir qu'un seul embout à visser.Given the small stroke required, it is possible to provide only one tip to screw.

Selon un deuxième mode de réalisation représenté sur la figure 9, le dispositif 35 comporte, en plus des éléments du premier mode de réalisation, des renforts transversaux 36 reliant les deux cerclages, le long des génératrices du panier, pour rigidifier l'ensemble, et éviter que les deux cerclages 18, 19 ne se rapprochent l'un de l'autre.According to a second embodiment shown on the figure 9 , the device 35 comprises, in addition to the elements of the first embodiment, transverse reinforcements 36 connecting the two hoops, along the generatrices of the basket, to stiffen the assembly, and prevent the two hoops 18, 19 from approaching each other. one of the other.

Ces renforts 36 sont fixés, selon différentes variantes par soudage, couture, collage, emboîtement.These reinforcements 36 are fixed, according to different variants by welding, sewing, gluing, interlocking.

Ces renforts 36 sont utiles notamment dans le cas ou le serrage réalisé par l'opérateur est insuffisant.These reinforcements 36 are particularly useful in the case where the tightening performed by the operator is insufficient.

La mise en place d'un dispositif de filtration selon l'un des modes de réalisation décrit ci-dessus peut être réalisé de la façon suivante.The introduction of a filtration device according to one of the embodiments described above can be achieved in the following manner.

Le dispositif est livré sur le site d'installation chez l'utilisateur enroulé sur un diamètre de 40 à 50 cm environ, en fonction de la taille de la toile et de la rigidité des cerclages 18, 19. La toile est dépliée dans le panier 2, puis est appliquée à la main contre la paroi perforée 7 du panier. Les vis ou embouts 25, 30 de chaque cerclage 18, 19 étant vissé(e)s complètement, elles sont mises en contact l'une contre l'autre, puis un premier cerclage 18 est positionné correctement dans le premier angle du panier 2, avant d'être mises faiblement en tension. Les vis ou embouts du second cerclage sont positionnées dans le second angle du panier 2, avant d'être mis faiblement en tension également.The device is delivered to the user's installation site rolled up to a diameter of approximately 40 to 50 cm, depending on the size of the fabric and the rigidity of the straps 18, 19. The fabric is unfolded in the basket 2, then is applied by hand against the perforated wall 7 of the basket. The screws or endpieces 25, 30 of each strapping 18, 19 being screwed completely, they are brought into contact one against the other, then a first strapping 18 is positioned correctly in the first angle of the basket 2, before being weakly energized. The screws or end pieces of the second strapping are positioned in the second angle of the basket 2, before being weakly put in tension also.

Les cerclages sont écartés le plus possible l'un de l'autre, de façon à tendre la toile 17. Les vis ou embouts 25, 30 sont alors dévissées au maximum, afin de bloquer la toile 17 dans cette configuration, ainsi que représenté sur la figure 8.The straps are spread apart as much as possible, so as to tension the web 17. The screws or end pieces 25, 30 are then unscrewed to the maximum, in order to block the fabric 17 in this configuration, as shown on the figure 8 .

Le montage complet dure, selon un exemple de réalisation, entre 5 et 10 minutes.The complete assembly lasts, according to an exemplary embodiment, between 5 and 10 minutes.

Il est à noter que les cerclages 18, 19 constituent une surépaisseur par rapport à la toile 17. Lorsqu'un racloir est utilisé, celui-ci doit être maintenu à une distance minimum de 12 mm de la toile.It should be noted that the straps 18, 19 constitute an extra thickness with respect to the fabric 17. When a scraper is used, it must be kept at a minimum distance of 12 mm from the fabric.

Avantageusement, les deux angles du racloir, en regard des cerclages, peuvent être coupés, de façon à pouvoir racler beaucoup plus près de la toile. Il est ainsi possible de diminuer la couche résiduelle de matière solide restant à la fin du raclage à 8 voire 5 mm, contre 10 ou 15 mm actuellement.Advantageously, the two angles of the scraper, opposite the strapping, can be cut, so as to scrape much closer to the canvas. It is thus possible to reduce the residual layer of solid material remaining at the end of scraping to 8 or even 5 mm, against 10 or 15 mm currently.

Selon une variante, le dispositif comprend une grille drainante 37, représenté sur les figures 10 et 11, installée sous la toile filtrante 17, permettant au liquide de se drainer sous la toile filtrante, vers les trous du panier perforé. La grille ne pouvant pas être facilement soudée sur un cerclage en matière plastique, les deux grands bords de la grille rectangulaire sont assemblés chacun sur une bande de tissus 38 ou à une très fine bande en matière plastique. Chaque bande est ensuite assemblée, notamment par soudage, polyfusion, collage ou vissage à un cerclage en matière plastique 39.According to a variant, the device comprises a draining grid 37, represented on the Figures 10 and 11 installed under the filter cloth 17, allowing the liquid to drain under the filter cloth, to the holes of the perforated basket. The grid can not be easily welded to a plastic strapping, the two large edges of the rectangular grid are each assembled on a strip of tissue 38 or a very thin strip of plastic. Each strip is then assembled, in particular by welding, polyfusion, gluing or screwing to a plastic strapping 39.

Afin d'assurer l'étanchéité de chaque cerclage, une découpe mâle/femelle 40 est réalisée à chaque extrémité, ce qui est notamment visible sur la figure 11.In order to ensure the tightness of each strapping, a male / female cutout 40 is made at each end, which is particularly visible on the figure 11 .

L'ensemble ainsi formé est simplement déposé dans le panier. Ce sont ensuite les cerclages 18, 19 du dispositif 16, 35 qui prennent appui dessus et qui le maintiennent en place.The assembly thus formed is simply deposited in the basket. It is then the straps 18, 19 of the device 16, 35 which bear on it and hold it in place.

Selon un troisième mode de réalisation, représenté sur la figure 12, le dispositif comprend en outre des éléments du premier mode de réalisation, deux cerclages métalliques 45 destinés à prendre appui sur les deux cerclages souples 43 fixés sur la toile 42, chaque cerclage souple 43 comprenant une gorge 44 destinée à recevoir le cerclage métallique 45.According to a third embodiment, represented on the figure 12 , the device further comprises elements of the first embodiment, two metal strapping 45 intended to bear on the two flexible strapping 43 fixed on the cloth 42, each flexible strapping 43 comprising a groove 44 intended to receive the metal strapping 45.

Comme il va se soi, l'invention ne se limite pas aux formes de réalisation préférentielles décrites ci-dessus, à titre d'exemples ; elle en embrasse au contraire toutes les variantes dans le cadre des revendications annexées.As is self-evident, the invention is not limited to the preferred embodiments described above, by way of examples; it encompasses all variants within the scope of the appended claims.

En particulier, il est également possible d'utiliser d'autres moyens de mise en tension.In particular, it is also possible to use other means of tensioning.

Claims (10)

  1. Filtration device (16, 35) intended to be placed in a spin dryer comprising a basket (2) having a perforated wall (7) enabling liquid to pass through it, intended to be rotated so as to expel the liquid by centrifugation to the outside of the basket (2), which includes a flexible filter cloth (17) intended to be applied against the perforated wall of the basket, characterized in that it further includes at least two flexible hoops (18, 19) fastened to the cloth (17) and enabling the latter to be held in position in the basket (2), the device comprising at least a plurality of fastening points for fastening the cloth (17) to the hoops (18, 19), while keeping the hoops (18, 19) in position relative to the cloth (17) so as to prevent any relative movement between the cloth and the hoops (18, 19) whether or not the cloth is fastened in the basket (2).
  2. Device (16, 35) according to Claim 1, characterized in that the flexible hoops (18, 19) are welded, polyfused or bonded to the cloth (17) at several points or in a continuous line.
  3. Device (16, 35) according to either of Claims 1 and 2, characterized in that the flexible hoops (18, 19) are made of plastic.
  4. Device (16, 35) according to one of Claims 1 to 3, characterized in that each of the ends (20, 22) of a hoop (18, 19) is respectively equipped with tensioning means (23, 24), the tensioning means (23, 24) for tensioning the two ends being intended to cooperate so as to tension the hoop (18, 19).
  5. Device (16, 35) according to Claim 4, characterized in that the tensioning means (23, 24), operating in particular by screwing, cooperate with:
    - a metal insert (33) placed at each end of the hoop (18, 19); or
    - an intermediate end-piece (26) which is fastened to each end of the hoop and may or may not include a metal insert (26).
  6. Device (16, 35) according to one of Claims 1 to 5, characterized in that it includes transverse reinforcements (36) connecting the at least two hoops (18, 19).
  7. Device (16, 35) according to one of Claims 1 to 6, characterized in that it further includes at least one metal hoop (45) intended to bear on a flexible hoop (18, 19).
  8. Device (35) according to Claim 7, characterized in that at least one flexible hoop (18, 19) includes a groove (44) intended to accommodate the metal hoop (45).
  9. Device (16, 35) according to one of Claims 1 to 8, characterized in that it includes a draining mesh (37) intended to be placed between the filter cloth (17) and the perforated wall (7) of the basket (2), said mesh being fastened by two connecting elements (38) to two secondary hoops (39).
  10. Device (16, 35) according to Claim 9, characterized in that the secondary hoops (39) include a substantially impervious link (40) at their ends.
EP06356105A 2005-09-05 2006-09-05 Filtering device comprising a porous web and at least two maintaning extension hoops Active EP1759769B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0509047A FR2890320B1 (en) 2005-09-05 2005-09-05 SPINNING WEBS

Publications (2)

Publication Number Publication Date
EP1759769A1 EP1759769A1 (en) 2007-03-07
EP1759769B1 true EP1759769B1 (en) 2009-04-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06356105A Active EP1759769B1 (en) 2005-09-05 2006-09-05 Filtering device comprising a porous web and at least two maintaning extension hoops

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EP (1) EP1759769B1 (en)
AT (1) ATE427785T1 (en)
DE (1) DE602006006124D1 (en)
FR (1) FR2890320B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283909A (en) * 1963-12-20 1966-11-08 Ametek Inc Centrifugal separator
DE2938684A1 (en) * 1979-09-25 1981-04-09 Krauss-Maffei AG, 8000 München Filter cloths in centrifuge bowl - tensioned by rings contoured to fit inner profile of bowl
IT1193579B (en) * 1981-02-26 1988-07-08 Comi Condor Spa ARRANGEMENT FOR FIXING THE FILTER SEPTANCE TO THE BASKET IN CENTRIFUGES
DE4407515C1 (en) * 1994-03-07 1995-08-17 Krauss Maffei Ag Device for clamping a filter medium in a centrifuge drum
JPH10180144A (en) * 1996-12-26 1998-07-07 Mitsubishi Kakoki Kaisha Ltd Fastener for filter medium of centrifugal filter
US6761821B2 (en) * 2002-09-23 2004-07-13 Weatherford/Lamb, Inc. Clamping-hook ring

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Publication number Publication date
FR2890320A1 (en) 2007-03-09
EP1759769A1 (en) 2007-03-07
DE602006006124D1 (en) 2009-05-20
ATE427785T1 (en) 2009-04-15
FR2890320B1 (en) 2007-11-23

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