WO2002076570A1 - Filtering assembly provided with means facilitating filtering cartridge replacement - Google Patents

Filtering assembly provided with means facilitating filtering cartridge replacement Download PDF

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Publication number
WO2002076570A1
WO2002076570A1 PCT/FR2002/000943 FR0200943W WO02076570A1 WO 2002076570 A1 WO2002076570 A1 WO 2002076570A1 FR 0200943 W FR0200943 W FR 0200943W WO 02076570 A1 WO02076570 A1 WO 02076570A1
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WO
WIPO (PCT)
Prior art keywords
cover
filter assembly
cylindrical element
assembly according
cartridge
Prior art date
Application number
PCT/FR2002/000943
Other languages
French (fr)
Inventor
Gérard MALGORN
Original Assignee
Fleetguard
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fleetguard filed Critical Fleetguard
Publication of WO2002076570A1 publication Critical patent/WO2002076570A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/153—Anti-leakage or anti-return valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B01D2201/305—Snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4084—Snap or Seeger ring connecting means

Definitions

  • Filter assembly provided with means facilitating the replacement of the filter cartridge.
  • the invention relates to the field of design and production of filter assemblies used to filter liquids flowing in engines or hydraulic equipment.
  • Such filter assemblies are constituted by a filter body inside which is disposed a filter cartridge, which generally has a cylindrical shape and which includes a filtration medium, which may for example be made of paper, cardboard or even felt.
  • This filtration medium is conventionally delimited by two end flanges.
  • Such filtration cartridges generally cooperate with a central tube, integral or not with the flanges, the outside diameter of which is close to the inside diameter of the filtration medium so as to limit the deformations of the medium under the effect of the pressure exerted at l inside the filter assembly.
  • the lower flanges can be extended to present means for positioning and holding the cartridge in the filter assembly.
  • filter assemblies which use a support tube on which the filter cartridge is attached, the tube being permanently mounted in the filter assembly.
  • the used cartridge is removed from the tank and replaced by a new cartridge.
  • a conventional solution consists in integrating a support tube into the cover, the cartridge being held on the support tube by means of a felt seal.
  • the handling of these filter assemblies is not very easy in practice.
  • a filter assembly provided with a cover which cooperates by clipping with the filter cartridge, so that, the removal of the cover causes the extraction of the filter cartridge .
  • the operator then separates the cartridge from the cover using any tool, fixes a new cartridge on the cover and replaces the assembly on the tank.
  • the advantage of this solution lies essentially in the fact that, during all its intervention, the operator is not forced to grab the filter cartridge directly and therefore avoids contact of the liquid.
  • this solution has several drawbacks.
  • the filtration cartridge has a complex structure, integrating the filtration medium, the lower and upper flanges, but also the support tube forming a single piece with the upper flange and the clipping means cooperating with the cover.
  • the invention particularly aims to overcome the drawbacks of the prior art.
  • the invention aims to provide a filter assembly which allows the replacement of the filter cartridge without direct contact of the operator with it.
  • the invention also aims to allow such a replacement which limits the amount of parts and / or material to be removed after renewal of the cartridge.
  • Another object of the invention is to provide such a filter assembly which promotes the return of liquid, during the change of the cartridge, to the liquid reservoir.
  • the invention also aims to provide such an assembly which allows the degassing of the filter element during filling with liquid from the tank.
  • Yet another objective of the invention is to provide such a filter assembly, the parts involved in the renewal of the cartridge are substantially symmetrical so as to facilitate mounting (no mounting direction).
  • a filtering assembly for liquid circulating in an engine or hydraulic equipment, of the type comprising a tank, a cover and a cylindrical element. intended to support a filter cartridge comprising a filtration medium delimited by an upper flange and a lower flange.
  • said cylindrical element comprises a pivoting connecting element capable of cooperating with said cover, and said cover comprises at least one means for retaining said upper flange.
  • a filter assembly is thus obtained allowing the operator to remove the cartridge via the cover, without having to grasp the cartridge.
  • the cartridge and the cylindrical element can be separated using the pivoting connection as will be seen below. In this way, only the cartridge is intended to be replaced, and therefore destroyed, thus limiting the production of waste.
  • said connecting element of said cylindrical element forms a ball joint and said cover has means of cooperation with said ball joint.
  • said cooperation means include retaining fingers delimiting a substantially cylindrical space intended to receive said ball joint.
  • the cylindrical element is coupled to the cover by a slightly force fitting during which the ball of the cylindrical element snaps into the space delimited by the retaining fingers.
  • said cover comprises means capable of forming a lever for said upper flange so as to release it from said retaining means included in the cover.
  • said means for retaining said upper flange comprises at least one latching lug.
  • said means for retaining said upper flange comprises at least two latching lugs.
  • the operator thus has a simple and effective means allowing him to clearly feel, during assembly, the engagement of the cartridge in the cover, and, when replacing the cartridge, the disengagement of the latter.
  • said cylindrical element comprises a central recess.
  • a central conduit is thus obtained inside the cylindrical element, this conduit being able to be put in relation or not with other conduits (evacuation of filtered liquid, return to the tank, degassing ...) according to the desired functions.
  • said central recess opens through said connecting element by a vent, the other end of said central recess being capable of communicating with a conduit formed in said tank for the return of said liquid, and possibly gas, to the reservoir. said motor or said hydraulic equipment.
  • the central duct of the cylindrical element is thus used for a degassing function of the filter assembly, operating essentially at the time of filling of the filter assembly with liquid.
  • said cylindrical element comprises centering fins capable of cooperating with said filtration cartridge.
  • said tank comprises a housing intended to receive the base of the cylindrical element.
  • said housing is capable of communicating with said conduit formed in said tank for the return of said liquid, and possibly gas, to the reservoir of said engine or of said hydraulic equipment.
  • the housing is freed from the presence of the cylindrical element and the liquid contained in the tank can flow through the orifice towards the liquid tank, until with complete or almost complete emptying of the tank.
  • the invention also relates to a cylindrical element comprising a pivoting connecting element capable of cooperating with said cover of a filter assembly as described above.
  • said pivoting connecting element is a ball joint.
  • FIG. 9 to 11 illustrate respectively views from below, in perspective and in section of a variant of a cover comprising retaining means according to the invention.
  • a filter assembly for liquid circulating in an engine or hydraulic equipment comprises a tank 1 and a cover 2 defining a volume inside which is mounted a cylindrical element 3 which supports a filter cartridge comprising a filtration medium 4 delimited by an upper flange 41 and a lower flange 42.
  • the tank 1 comprises an inlet orifice 101 for liquid, an orifice 102 for an outlet duct for filtered liquid, an orifice 103 for a duct for returning to the liquid reservoir.
  • the cylindrical element 3 has at its upper end a ball joint 31 forming a connection element with the cover 2, the latter including means of cooperation with the ball joint 31 formed by retaining fingers 21.
  • the cover 2 incorporates six pins 22 forming retaining means by snap-fastening the upper flange 41 of the filter cartridge.
  • the cover 2 also has six shoulders 23, each interposed between two lugs 22, capable of forming a surface against which the upper flange 41 can be pressed so as to form a lever when the cartridge is extracted like this. will be explained later.
  • the cover 2 incorporates five lugs 22 and five shoulders 23.
  • an odd number of lugs and shoulders makes it possible to obtain a configuration wherein each lug is diametrically opposed to a shoulder.
  • the cylindrical element 3 is previously coupled to the cover 2 (separated from the tank 1) by introduction of the ball joint 31 between the retaining fingers 21.
  • the cartridge is then fitted onto the cylindrical element 3, the centering of the cartridge relative to the cylindrical element being ensured by the centering fins 32.
  • the fitting of the cartridge is continued until the upper flange snaps onto the cover 2 via the pins 22.
  • the assembly thus formed is then placed in the tank 1, so that the base of the cylindrical element 3 takes place in a housing 104 provided for this purpose at the bottom of the tank 1, the connection between the element cylindrical 3 and the housing 104 being sealed using a seal 34.
  • the housing 104 communicates with the orifice 103 of the return pipe to the liquid tank. In this way, during the extraction of the filter cartridge, the housing 104 is released from the presence of the cylindrical element 3 and the liquid contained in the tank 1 can flow through the orifice 103 towards the reservoir of liquid, until complete or almost complete emptying of the tank.
  • a central recess 33 is formed in the cylindrical element 3. This central recess 33 communicates with the orifice 103 of the return pipe to the liquid tank, while it opens, by its other end, through the ball joint 31 through a vent 311.
  • the air contained in the tank 1 passes through the vent 311, then through the central recess 33 to be redirected to the liquid tank.
  • the dimensions of the vent 311, of the order of 0.5 mm, make it possible to limit, and make acceptable, the leakage of unfiltered liquid which returns to the reservoir.
  • the initial state of the filter assembly in the assembled state corresponds to FIG. 2, the cover 2 being secured to the tank 1, the cylindrical element 3 coupled to the cover and the cartridge, by means of its flange upper 41, being held by the pins 22 on the cover 2.
  • the operator proceeds to the succession of these stages while only grasping the cover, which constitutes a generally relatively clean part of the filtering assemblies.

Abstract

The invention concerns the designing and production of filtering cartridges used for filtering liquids circulating in engines or hydraulic equipment. More specifically, the invention concerns a filtering assembly for liquid circulating in an engine or a hydraulic equipment, comprising a vessel (1), a cover (2) and a cylindrical element (3) designed to support a filtering cartridge including a filtering medium (4) delimited by an upper plate (41) and a lower plate (42). The invention is characterised in that said cylindrical element (3) comprises a pivoted linking element (31) capable of co-operating with said cover (2), and said cover (2) includes at least means for retaining (22) said upper plate (41).

Description

Ensemble de filtrage pourvu de moyens facilitant le remplacement de la cartouche de filtration. Filter assembly provided with means facilitating the replacement of the filter cartridge.
L'invention concerne le domaine de la conception et de la réalisation des ensembles de filtrage utilisés pour filtrer les liquides circulant dans les moteurs ou les équipements hydrauliques.The invention relates to the field of design and production of filter assemblies used to filter liquids flowing in engines or hydraulic equipment.
De tels ensembles de filtrage sont constitués par un corps de filtre à l'intérieur duquel est disposée une cartouche de filtrage, qui présente généralement une forme cylindrique et qui inclut un médium de filtration, pouvant par exemple être en papier, en carton ou encore en feutre. Ce médium de filtration est classiquement délimité par deux flasques d'extrémité.Such filter assemblies are constituted by a filter body inside which is disposed a filter cartridge, which generally has a cylindrical shape and which includes a filtration medium, which may for example be made of paper, cardboard or even felt. This filtration medium is conventionally delimited by two end flanges.
De telles cartouches de filtration coopèrent généralement avec un tube central, solidaire ou non des flasques, dont le diamètre extérieur avoisine le diamètre intérieur du médium de filtration de façon à limiter les déformations du médium sous l'effet de la pression s'exerçant à l'intérieur de l'ensemble de filtrage.Such filtration cartridges generally cooperate with a central tube, integral or not with the flanges, the outside diameter of which is close to the inside diameter of the filtration medium so as to limit the deformations of the medium under the effect of the pressure exerted at l inside the filter assembly.
Les flasques inférieurs peuvent se prolonger pour présenter des moyens de mise en place et de maintien de la cartouche dans l'ensemble de filtrage.The lower flanges can be extended to present means for positioning and holding the cartridge in the filter assembly.
Alternativement, on connaît des ensembles de filtration mettant en œuvre un tube support sur lequel est rapportée la cartouche de filtration, le tube étant monté à demeure dans l'ensemble de filtrage.Alternatively, filter assemblies are known which use a support tube on which the filter cartridge is attached, the tube being permanently mounted in the filter assembly.
Lorsque la cartouche placée dans la cuve est usagée, c'est-à-dire lorsque l'élément filtrant ne remplit plus son rôle de filtration de façon satisfaisante, on ôte la cartouche usagée de la cuve et on la remplace par une nouvelle cartouche.When the cartridge placed in the tank is used, that is to say when the filter element no longer fulfills its filtration role in a satisfactory manner, the used cartridge is removed from the tank and replaced by a new cartridge.
Lors de ce changement, l'opérateur doit extraire la cartouche de la cuve de l'ensemble de filtrage afin de pouvoir insérer une cartouche neuve dans celle-ci.During this change, the operator must extract the cartridge from the tank of the filtering assembly in order to be able to insert a new cartridge into it.
Selon une approche prévoyant que l'enlèvement du couvercle de l'ensemble de filtrage entraîne l'extraction de la cartouche, une solution classique consiste à intégrer au couvercle un tube support, la cartouche étant maintenue sur le tube support à l'aide d'un joint feutre. La manipulation de ces ensembles de filtrage s'avère peu aisée en pratique.According to an approach providing that the removal of the cover from the filtering assembly involves the extraction of the cartridge, a conventional solution consists in integrating a support tube into the cover, the cartridge being held on the support tube by means of a felt seal. The handling of these filter assemblies is not very easy in practice.
De plus, pour procéder au remplacement de la cartouche, l'opérateur est amené à se saisir à pleine main de la cartouche usagée pour la séparer de la cuve et/ou de son tube support. Outre la sensation désagréable que cela procure, les mains de l'opérateur sont rapidement tachées de façon difficilement réversible, avec des fluides dont l'innocuité ne peut être garantie (en particulier lorsqu'ils contiennent des métaux lourds).In addition, to replace the cartridge, the operator is led to grab the used cartridge with the full hand to separate it from the tank and / or its support tube. In addition to the unpleasant feeling it gives, the operator's hands are quickly stained in a manner that is difficult to reverse, with fluids whose harmlessness cannot be guaranteed (especially when they contain heavy metals).
Pour faciliter l'extraction des cartouches usagées, diverses solutions ont été proposées.To facilitate the extraction of used cartridges, various solutions have been proposed.
On connaît notamment, selon le document DE - 197 16085, un ensemble de filtrage muni d'un couvercle qui coopère par clipsage avec la cartouche de filtration, de telle sorte que, l'enlèvement du couvercle entraîne l'extraction de la cartouche de filtration. L'opérateur sépare ensuite la cartouche du couvercle à l'aide d'un outil quelconque, fixe sur le couvercle une cartouche neuve et replace l'ensemble sur la cuve. L'avantage de cette solution réside essentiellement dans le fait que, pendant toute son intervention, l'opérateur n'est pas contraint de se saisir directement de la cartouche de filtration et évite donc le contact du liquide. Cette solution présente toutefois plusieurs inconvénients. En premier lieu, la cartouche de filtration présente une structure complexe, intégrant le médium de filtration, les flasques inférieur et supérieur, mais aussi le tube support formant une pièce unique avec le flasque supérieur et les moyens de clipsage coopérant avec le couvercle. L'ensemble s'avère donc coûteux, tant à produire qu'à remplacer. En second lieu, un tel ensemble est remplacé solidairement à chaque renouvellement de cartouche. Comme cela vient d'être indiqué, le nombre de pièces composant cet ensemble et leur masse sont relativement importants. Or, les cartouches usagées sont destinées à être incinérées et la tendance actuelle est de diminuer notablement la proportion de matériau plastique nécessaire à la fabrication de telles cartouches pour en faciliter leur destruction ultérieure. La solution décrite dans le document DE - 197 16 085 ne contribue donc pas à aller dans le sens de la tendance actuelle visant à diminuer la production de déchets organiques.Particularly known, according to document DE - 197 16085, a filter assembly provided with a cover which cooperates by clipping with the filter cartridge, so that, the removal of the cover causes the extraction of the filter cartridge . The operator then separates the cartridge from the cover using any tool, fixes a new cartridge on the cover and replaces the assembly on the tank. The advantage of this solution lies essentially in the fact that, during all its intervention, the operator is not forced to grab the filter cartridge directly and therefore avoids contact of the liquid. However, this solution has several drawbacks. First, the filtration cartridge has a complex structure, integrating the filtration medium, the lower and upper flanges, but also the support tube forming a single piece with the upper flange and the clipping means cooperating with the cover. The assembly is therefore expensive, both to produce and to replace. Secondly, such an assembly is replaced jointly with each renewal of the cartridge. As has just been indicated, the number of parts making up this assembly and their mass are relatively large. However, used cartridges are intended to be incinerated and the current trend is to significantly reduce the proportion of plastic material necessary for the manufacture of such cartridges to facilitate their subsequent destruction. The solution described in the document DE - 197 16 085 therefore does not contribute to going in the direction of the current trend aiming at decreasing the production of organic waste.
L'invention a notamment pour objectif de palier les inconvénients de l'art antérieur.The invention particularly aims to overcome the drawbacks of the prior art.
Plus précisément, l'invention a pour objectif de fournir un ensemble de filtrage qui permet le remplacement de la cartouche de filtration sans contact direct de l'opérateur avec celle-ci.More specifically, the invention aims to provide a filter assembly which allows the replacement of the filter cartridge without direct contact of the operator with it.
L'invention a également pour objectif de permettre un tel remplacement qui limite la quantité de pièces et/ou de matière à éliminer après renouvellement de la cartouche.The invention also aims to allow such a replacement which limits the amount of parts and / or material to be removed after renewal of the cartridge.
Un autre objectif de l'invention est de proposer un tel ensemble de filtrage qui favorise le retour de liquide, lors du changement de la cartouche, vers le réservoir de liquide. L'invention a aussi pour objectif de fournir un tel ensemble qui permette le dégazage de l'élément de filtrage lors du remplissage en liquide de la cuve.Another object of the invention is to provide such a filter assembly which promotes the return of liquid, during the change of the cartridge, to the liquid reservoir. The invention also aims to provide such an assembly which allows the degassing of the filter element during filling with liquid from the tank.
Encore un autre objectif de l'invention est de proposer un tel ensemble de filtrage dont les pièces impliquées dans le renouvellement de la cartouche sont sensiblement symétriques de façon à faciliter le montage (pas de sens de montage).Yet another objective of the invention is to provide such a filter assembly, the parts involved in the renewal of the cartridge are substantially symmetrical so as to facilitate mounting (no mounting direction).
Ces différents objectifs, ainsi que d'autres qui apparaîtront par la suite, sont atteints à l'aide d'un ensemble de filtrage pour liquide circulant dans un moteur ou un équipement hydraulique, du type comprenant une cuve, un couvercle et un élément cylindrique destiné à supporter une cartouche de filtration comprenant un médium de filtration délimité par un flasque supérieur et un flasque inférieur. Selon l'invention, ledit élément cylindrique comprend un élément de liaison à pivotement susceptible de coopérer avec ledit couvercle, et ledit couvercle comprend au moins un moyen de retenue dudit flasque supérieur.These various objectives, as well as others which will appear subsequently, are achieved using a filtering assembly for liquid circulating in an engine or hydraulic equipment, of the type comprising a tank, a cover and a cylindrical element. intended to support a filter cartridge comprising a filtration medium delimited by an upper flange and a lower flange. According to the invention, said cylindrical element comprises a pivoting connecting element capable of cooperating with said cover, and said cover comprises at least one means for retaining said upper flange.
On obtient ainsi un ensemble de filtrage permettant à l'opérateur de retirer la cartouche par l'intermédiaire du couvercle, sans avoir à se saisir de la cartouche. Contrairement à l'art antérieur, la cartouche et l'élément cylindrique sont séparables à l'aide de la liaison à pivotement comme on le verra par la suite. De cette façon, seule la cartouche est destinée à être remplacée, et donc détruite, limitant ainsi la production de déchets. Selon une solution avantageuse, ledit élément de liaison dudit élément cylindrique forme une rotule et ledit couvercle présente des moyens de coopération avec ladite rotule.A filter assembly is thus obtained allowing the operator to remove the cartridge via the cover, without having to grasp the cartridge. Unlike the prior art, the cartridge and the cylindrical element can be separated using the pivoting connection as will be seen below. In this way, only the cartridge is intended to be replaced, and therefore destroyed, thus limiting the production of waste. According to an advantageous solution, said connecting element of said cylindrical element forms a ball joint and said cover has means of cooperation with said ball joint.
Cette caractéristique assure un montage aisé de l'élément cylindrique ainsi que de la cartouche sur le couvercle de l'élément de filtrage. En effet, d'une part, il n'est pas nécessaire de respecter un sens de montage particulier pour associer l'élément cylindrique et le couvercle. D'autre part, la liaison rotule assure la possibilité d'incliner indifféremment l'élément cylindrique par rapport au couvercle pour l'extraction de la cartouche comme cela va être indiqué ci- après. Selon une solution avantageuse, lesdits moyens de coopération incluent des doigts de retenue délimitant un espace sensiblement cylindrique destiné à recevoir ladite rotule.This characteristic ensures easy mounting of the cylindrical element as well as of the cartridge on the cover of the filter element. Indeed, on the one hand, it is not necessary to respect a particular mounting direction to associate the cylindrical element and the cover. On the other hand, the ball joint connection ensures the possibility of inclining the cylindrical element indifferently relative to the cover for the extraction of the cartridge as will be indicated below. According to an advantageous solution, said cooperation means include retaining fingers delimiting a substantially cylindrical space intended to receive said ball joint.
De cette façon, l'élément cylindrique est couplé au couvercle par un montage légèrement à force au cours duquel la rotule de l'élément cylindrique s'encliquète dans l'espace délimité par les doigts de retenue.In this way, the cylindrical element is coupled to the cover by a slightly force fitting during which the ball of the cylindrical element snaps into the space delimited by the retaining fingers.
Selon une caractéristique particulièrement avantageuse de l'invention, ledit couvercle comprend des moyens susceptibles de former un levier pour ledit flasque supérieur de façon à dégager celui-ci dudit moyen de retenue compris dans le couvercle. De cette façon, aucun outil n'est nécessaire pour procéder à la séparation de la cartouche du couvercle. L'opération est ainsi notablement simplifiée dans la mesure où il suffit d'incliner l'élément cylindrique et la cartouche par rapport au couvercle en leur faisant prendre appui sur un support quelconque, jusqu'à ce que la cartouche se désengage des moyens de retenue intégrés au couvercle. Avantageusement, ledit moyen de retenue dudit flasque supérieur comprend au moins un ergot d'encliquetage. Préferentiellement, ledit moyen de retenue dudit flasque supérieur comprend au moins deux ergots d'encliquetage.According to a particularly advantageous characteristic of the invention, said cover comprises means capable of forming a lever for said upper flange so as to release it from said retaining means included in the cover. In this way, no tools are necessary to separate the cartridge from the cover. The operation is thus considerably simplified in so far as it suffices to tilt the cylindrical element and the cartridge relative to the cover by making them bear on any support, until the cartridge disengages from the retaining means. integrated into the cover. Advantageously, said means for retaining said upper flange comprises at least one latching lug. Preferably, said means for retaining said upper flange comprises at least two latching lugs.
L'opérateur dispose ainsi d'un moyen simple et efficace lui permettant de ressentir clairement, lors du montage, l'engagement de la cartouche dans le couvercle, et, au moment du remplacement de la cartouche, le désengagement de celle-ci.The operator thus has a simple and effective means allowing him to clearly feel, during assembly, the engagement of the cartridge in the cover, and, when replacing the cartridge, the disengagement of the latter.
Selon une solution préférentielle, ledit élément cylindrique comprend un évidement central. On obtient ainsi un conduit central à l'intérieur de l'élément cylindrique, ce conduit pouvant être mis en relation ou non avec d'autres conduits (évacuation de liquide filtré, retour au réservoir, dégazage...) selon les fonctions souhaitées.According to a preferred solution, said cylindrical element comprises a central recess. A central conduit is thus obtained inside the cylindrical element, this conduit being able to be put in relation or not with other conduits (evacuation of filtered liquid, return to the tank, degassing ...) according to the desired functions.
Selon une autre caractéristique, ledit évidement central débouche au travers dudit élément de liaison par un évent, l'autre extrémité dudit évidement central étant susceptible de communiquer avec un conduit ménagé dans ladite cuve pour le retour dudit liquide, et éventuellement du gaz, au réservoir dudit moteur ou dudit équipement hydraulique.According to another characteristic, said central recess opens through said connecting element by a vent, the other end of said central recess being capable of communicating with a conduit formed in said tank for the return of said liquid, and possibly gas, to the reservoir. said motor or said hydraulic equipment.
Le conduit central de l'élément cylindrique est ainsi utilisé pour une fonction de dégazage de l'ensemble de filtrage, opérant essentiellement au moment du remplissage en liquide de l'ensemble de filtrage.The central duct of the cylindrical element is thus used for a degassing function of the filter assembly, operating essentially at the time of filling of the filter assembly with liquid.
Avantageusement, ledit élément cylindrique comprend des ailettes de centrage susceptibles de coopérer avec ladite cartouche de filtration.Advantageously, said cylindrical element comprises centering fins capable of cooperating with said filtration cartridge.
Cette caractéristique contribue à faciliter le montage de la cartouche sur le couvercle en relation avec l'élément cylindrique. Bien entendu, d'autres moyens remplissant la même fonction peuvent être envisagés sans sortir du cadre de l'invention.This characteristic contributes to facilitating the mounting of the cartridge on the cover in relation to the cylindrical element. Of course, other means fulfilling the same function can be envisaged without departing from the scope of the invention.
Préferentiellement, ladite cuve comprend un logement destiné à recevoir la base de l'élément cylindrique. Dans ce cas, ledit logement est susceptible de communiquer avec ledit conduit ménagé dans ladite cuve pour le retour dudit liquide, et éventuellement du gaz, au réservoir dudit moteur ou dudit équipement hydraulique.Preferably, said tank comprises a housing intended to receive the base of the cylindrical element. In this case, said housing is capable of communicating with said conduit formed in said tank for the return of said liquid, and possibly gas, to the reservoir of said engine or of said hydraulic equipment.
De cette façon, lors de l'extraction de la cartouche de filtration, le logement est libéré de la présence de l'élément cylindrique et le liquide contenu dans la cuve peut s'écouler par l'orifice vers le réservoir de liquide, jusqu'à vidange complète ou quasi complète de la cuve.In this way, during the extraction of the filter cartridge, the housing is freed from the presence of the cylindrical element and the liquid contained in the tank can flow through the orifice towards the liquid tank, until with complete or almost complete emptying of the tank.
L'invention concerne également un élément cylindrique comprenant un élément de liaison à pivotement susceptible de coopérer avec ledit couvercle d'un ensemble de filtrage tel que décrit précédemment. Préferentiellement, ledit élément de liaison à pivotement est une rotule.The invention also relates to a cylindrical element comprising a pivoting connecting element capable of cooperating with said cover of a filter assembly as described above. Preferably, said pivoting connecting element is a ball joint.
D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation préférentiel de l'invention donné à titre d'exemple illustratif et non limitatif, et des dessins parmi lesquels : - la figure 1 illustre en coupe un ensemble de filtrage à l'état monté selon l'invention ;Other characteristics and advantages of the invention will appear more clearly on reading the following description of a preferred embodiment of the invention given by way of illustrative and nonlimiting example, and of the drawings among which: Figure 1 illustrates in section a filter assembly in the assembled state according to the invention;
- les figures 2 à 6 illustrent les différentes étapes de l'opération d'extraction de la cartouche à l'aide de l'ensemble de filtrage selon l'invention - les figures 7 et 8 illustrent selon des vues respectivement de dessous et en perspective d'un couvercle comprenant des moyens de retenue selon l'invention ;- Figures 2 to 6 illustrate the different stages of the cartridge extraction operation using the filter assembly according to the invention - Figures 7 and 8 illustrate according to views respectively from below and in perspective a cover comprising retaining means according to the invention;
- les figures 9 à 11 illustrent selon des vues respectivement de dessous, en perspective et en coupe d'une variante d'un couvercle comprenant des moyens de retenue selon l'invention.- Figures 9 to 11 illustrate respectively views from below, in perspective and in section of a variant of a cover comprising retaining means according to the invention.
En référence à la figure 1, un ensemble de filtrage pour liquide circulant dans un moteur ou un équipement hydraulique comprend une cuve 1 et un couvercle 2 délimitant un volume à l'intérieur duquel est monté un élément cylindrique 3 qui supporte une cartouche de filtration comprenant un médium de filtration 4 délimité par un flasque supérieur 41 et un flasque inférieur 42. La cuve 1 comprend un orifice d'admission 101 de liquide, un orifice 102 d'un conduit de sortie de liquide filtré, un orifice 103 d'un conduit de retour au réservoir de liquide.Referring to Figure 1, a filter assembly for liquid circulating in an engine or hydraulic equipment comprises a tank 1 and a cover 2 defining a volume inside which is mounted a cylindrical element 3 which supports a filter cartridge comprising a filtration medium 4 delimited by an upper flange 41 and a lower flange 42. The tank 1 comprises an inlet orifice 101 for liquid, an orifice 102 for an outlet duct for filtered liquid, an orifice 103 for a duct for returning to the liquid reservoir.
L'élément cylindrique 3 présente en son extrémité supérieure une rotule 31 formant élément de liaison avec le couvercle 2, celui-ci incluant des moyens de coopération avec la rotule 31 formés par des doigts de retenue 21.The cylindrical element 3 has at its upper end a ball joint 31 forming a connection element with the cover 2, the latter including means of cooperation with the ball joint 31 formed by retaining fingers 21.
Selon le mode de réalisation illustré par les figures 7 et 8, le couvercle 2 intègre six ergots 22 formant moyens de retenue par encliquetage du flasque supérieur 41 de la cartouche de filtration. Le couvercle 2 présente en outre six épaulements 23, chacun intercalé entre deux ergots 22, susceptibles de former une surface contre laquelle le flasque supérieur 41 peut être mis en appui de façon à former un levier au moment de l'extraction de la cartouche comme cela va être expliqué par la suite.According to the embodiment illustrated in Figures 7 and 8, the cover 2 incorporates six pins 22 forming retaining means by snap-fastening the upper flange 41 of the filter cartridge. The cover 2 also has six shoulders 23, each interposed between two lugs 22, capable of forming a surface against which the upper flange 41 can be pressed so as to form a lever when the cartridge is extracted like this. will be explained later.
Selon une variante illustrée par les figures 9 à 11, le couvercle 2 intègre cinq ergots 22 et cinq épaulements 23. Comme cela apparaît clairement sur les figures 9 et 11, un nombre impair d'ergots et d'épaulements permet d'obtenir une configuration dans laquelle chaque ergot est diamétralement opposé à un épaulement.According to a variant illustrated by FIGS. 9 to 11, the cover 2 incorporates five lugs 22 and five shoulders 23. As is clearly seen in FIGS. 9 and 11, an odd number of lugs and shoulders makes it possible to obtain a configuration wherein each lug is diametrically opposed to a shoulder.
Pour le montage de la cartouche, l'élément cylindrique 3 est préalablement couplé au couvercle 2 (séparé de la cuve 1) par introduction de la rotule 31 entre les doigts de retenue 21. La cartouche est ensuite emmanchée sur l'élément cylindrique 3, le centrage de la cartouche par rapport à l'élément cylindrique étant assuré par les ailettes de centrage 32. L'emmanchement de la cartouche est poursuivi jusqu'à ce que le flasque supérieur s'encliquète sur le couvercle 2 par l'intermédiaire des ergots 22.For mounting the cartridge, the cylindrical element 3 is previously coupled to the cover 2 (separated from the tank 1) by introduction of the ball joint 31 between the retaining fingers 21. The cartridge is then fitted onto the cylindrical element 3, the centering of the cartridge relative to the cylindrical element being ensured by the centering fins 32. The fitting of the cartridge is continued until the upper flange snaps onto the cover 2 via the pins 22.
L'ensemble ainsi formé est alors mis en place dans la cuve 1, de telle sorte que la base de l'élément cylindrique 3 prenne place dans un logement 104 prévu à cet effet au fond de la cuve 1, la liaison entre l'élément cylindrique 3 et le logement 104 étant rendue étanche à l'aide d'un joint 34. Tel que cela apparaît clairement sur la figure 1, le logement 104 communique avec l'orifice 103 du conduit de retour au réservoir de liquide. De cette façon, lors de l'extraction de la cartouche de filtration, le logement 104 est libéré de la présence de l'élément cylindrique 3 et le liquide contenu dans la cuve 1 peut s'écouler par l'orifice 103 vers le réservoir de liquide, jusqu'à vidange complète ou quasi complète de la cuve.The assembly thus formed is then placed in the tank 1, so that the base of the cylindrical element 3 takes place in a housing 104 provided for this purpose at the bottom of the tank 1, the connection between the element cylindrical 3 and the housing 104 being sealed using a seal 34. As clearly shown in Figure 1, the housing 104 communicates with the orifice 103 of the return pipe to the liquid tank. In this way, during the extraction of the filter cartridge, the housing 104 is released from the presence of the cylindrical element 3 and the liquid contained in the tank 1 can flow through the orifice 103 towards the reservoir of liquid, until complete or almost complete emptying of the tank.
Selon le mode de réalisation préférentiel de l'invention, un évidement central 33 est ménagé dans l'élément cylindrique 3. Cet évidement central 33 communique avec l'orifice 103 du conduit de retour au réservoir de liquide, tandis qu'il débouche, par son autre extrémité, au travers de la rotule 31 par un évent 311.According to the preferred embodiment of the invention, a central recess 33 is formed in the cylindrical element 3. This central recess 33 communicates with the orifice 103 of the return pipe to the liquid tank, while it opens, by its other end, through the ball joint 31 through a vent 311.
Ainsi, lors du remplissage en liquide de l'ensemble de filtrage, l'air contenu dans la cuve 1 passe par l'évent 311, puis par l'évidement central 33 pour être redirigé vers le réservoir de liquide. Les dimensions de l'évent 311, de l'ordre de 0,5 mm, permettent de limiter, et de rendre acceptable, la fuite de liquide non filtré qui retourne au réservoir.Thus, during the filling of the filter assembly with liquid, the air contained in the tank 1 passes through the vent 311, then through the central recess 33 to be redirected to the liquid tank. The dimensions of the vent 311, of the order of 0.5 mm, make it possible to limit, and make acceptable, the leakage of unfiltered liquid which returns to the reservoir.
Les différentes étapes de l'opération d'extraction de la cartouche de filtration vont maintenant être détaillées à l'aide des figures 2 à 6.The different stages of the filtration cartridge extraction operation will now be detailed with the aid of FIGS. 2 to 6.
L'état initial de l'ensemble de filtrage à l'état monté correspond à la figure 2, le couvercle 2 étant solidarisé à la cuve 1, l'élément cylindrique 3 couplé au couvercle et la cartouche, par l'intermédiaire de son flasque supérieur 41, étant maintenue par les ergots 22 sur le couvercle 2.The initial state of the filter assembly in the assembled state corresponds to FIG. 2, the cover 2 being secured to the tank 1, the cylindrical element 3 coupled to the cover and the cartridge, by means of its flange upper 41, being held by the pins 22 on the cover 2.
L'ensemble formé par le couvercle 2, l'élément cylindrique 3 et la cartouche de filtration est séparé et désengagé de la cuve 1, tel que représenté à la figure 3.The assembly formed by the cover 2, the cylindrical element 3 and the filter cartridge is separated and disengaged from the tank 1, as shown in FIG. 3.
On procède ensuite à une inclinaison de l'élément cylindrique 3 et de la cartouche de filtration par rapport au couvercle 2 (figure 4), jusqu'à dégagement du flasque supérieur 41 de l'ergot 22, en faisant levier contre l'épaulement 23 tel qu'illustré par la figure 5. La cartouche de filtration peut alors être séparée de l'élément cylindrique 3 essentiellement sous l'effet de la gravité.Then proceed to an inclination of the cylindrical element 3 and the filter cartridge relative to the cover 2 (Figure 4), until the upper flange 41 of the lug 22 is released, by levering against the shoulder 23 as shown in Figure 5. The filter cartridge can then be separated from the cylindrical element 3 essentially under the effect of gravity.
L'opérateur procède à la succession de ces étapes en ne se saisissant que du couvercle, qui constitue une partie généralement relativement propre des ensembles de filtrage.The operator proceeds to the succession of these stages while only grasping the cover, which constitutes a generally relatively clean part of the filtering assemblies.
D'autres modes de réalisation basés sur le principe de l'ensemble de filtrage et du procédé d'extraction d'une cartouche de filtration qui viennent d'être décrits sont bien sûr envisageables sans sortir du cadre de l'invention Other embodiments based on the principle of the filter assembly and the method of extracting a filter cartridge which have just been described can of course be envisaged without departing from the scope of the invention

Claims

REVENDICATIONS
- Ensemble de filtrage pour liquide circulant dans un moteur ou un équipement hydraulique, du type comprenant une cuve (1), un couvercle- Filter assembly for liquid circulating in an engine or hydraulic equipment, of the type comprising a tank (1), a cover
(2) et un élément cylindrique (3) destiné à supporter une cartouche de filtration comprenant un médium de filtration (4) délimité par un flasque supérieur (41) et un flasque inférieur (42), caractérisé en ce que ledit élément cylindrique (3) comprend un élément de liaison (31) à pivotement susceptible de coopérer avec ledit couvercle (2), et en ce que ledit couvercle (2) comprend au moins un moyen de retenue (22) dudit flasque supérieur (41). - Ensemble de filtrage selon la revendication 1, caractérisé en ce que ledit élément de liaison (31) dudit élément cylindrique (3) forme une rotule et en ce que ledit couvercle (2) présente des moyens de coopération (21) avec ladite rotule. - Ensemble de filtrage selon la revendication 2, caractérisé en ce que lesdits moyens de coopération (21) incluent des doigts de retenue délimitant un espace sensiblement cylindrique destiné à recevoir ladite rotule. - Ensemble de filtrage selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ledit couvercle (2) comprend des moyens (23) susceptibles de former un levier pour ledit flasque supérieur (41) de façon à dégager celui-ci dudit moyen de retenue (22) compris dans le couvercle. - Ensemble de filtrage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ledit moyen de retenue (22) dudit flasque supérieur(2) and a cylindrical element (3) intended to support a filtration cartridge comprising a filtration medium (4) delimited by an upper flange (41) and a lower flange (42), characterized in that said cylindrical element (3 ) comprises a pivoting connecting element (31) capable of cooperating with said cover (2), and in that said cover (2) comprises at least one retaining means (22) of said upper flange (41). - Filter assembly according to claim 1, characterized in that said connecting element (31) of said cylindrical element (3) forms a ball and in that said cover (2) has means of cooperation (21) with said ball. - Filter assembly according to claim 2, characterized in that said cooperation means (21) include retaining fingers delimiting a substantially cylindrical space intended to receive said ball joint. - Filter assembly according to any one of claims 1 to 3, characterized in that said cover (2) comprises means (23) capable of forming a lever for said upper flange (41) so as to release it from said retaining means (22) included in the cover. - Filter assembly according to any one of claims 1 to 4, characterized in that said retaining means (22) of said upper flange
(41) comprend au moins un ergot d'encliquetage. - Ensemble de filtrage selon la revendication 5, caractérisé en ce que ledit moyen de retenue (22) dudit flasque supérieur (41) comprend au moins deux ergots d'encliquetage. - Ensemble de filtrage selon l'une quelconque des revendications 1 à 6, caractérisé en ce ledit élément cylindrique (3) comprend un évidement central (33). - Ensemble de filtrage selon la revendication 7, caractérisé en ce que ledit évidement central (33) débouche au travers dudit élément de liaison (31) par un évent (311) et en ce que l'autre extrémité dudit évidement central (33) est susceptible de communiquer avec un conduit (103) ménagé dans ladite cuve (1) pour le retour dudit liquide, et éventuellement du gaz, au réservoir dudit moteur ou dudit équipement hydraulique. - Ensemble de filtrage selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ledit élément cylindrique (3) comprend des ailettes de centrage (32) susceptibles de coopérer avec ladite cartouche de filtration. - Ensemble de filtrage selon le l'une quelconque des revendications 1 à 9, caractérisé en ce que ladite cuve (1) comprend un logement (104) destiné à recevoir la base de l'élément cylindrique (3). - Ensemble de filtrage selon la revendication 10, caractérisé en ce que ledit logement (104) est susceptible de communiquer avec ledit conduit (103) ménagé dans ladite cuve (1) pour le retour dudit liquide, et éventuellement du gaz, au réservoir dudit moteur ou dudit équipement hydraulique. - Elément cylindrique (3) comprenant un élément de liaison (31) à pivotement susceptible de coopérer avec ledit couvercle (2) d'un ensemble de filtrage selon l'une quelconque des revendications 1 à 11. - Elément cylindrique selon la revendication 12, caractérisé en ce que ledit élément de liaison (31) à pivotement est une rotule. (41) comprises at least one latching lug. - Filter assembly according to claim 5, characterized in that said retaining means (22) of said upper flange (41) comprises at least two latching lugs. - Filter assembly according to any one of claims 1 to 6, characterized in that said cylindrical element (3) comprises a central recess (33). - Filter assembly according to claim 7, characterized in that said central recess (33) opens through said connecting element (31) by a vent (311) and in that the other end of said central recess (33) is capable of communicating with a conduit (103) formed in said tank (1) for the return of said liquid, and possibly gas, to the reservoir of said engine or of said hydraulic equipment. - Filter assembly according to any one of claims 1 to 8, characterized in that said cylindrical element (3) comprises centering fins (32) capable of cooperating with said filtration cartridge. - Filter assembly according to any one of claims 1 to 9, characterized in that said tank (1) comprises a housing (104) intended to receive the base of the cylindrical element (3). - Filter assembly according to claim 10, characterized in that said housing (104) is capable of communicating with said conduit (103) formed in said tank (1) for the return of said liquid, and possibly gas, to the reservoir of said engine or said hydraulic equipment. - Cylindrical element (3) comprising a pivoting connection element (31) capable of cooperating with said cover (2) of a filter assembly according to any one of Claims 1 to 11. - Cylindrical element according to Claim 12, characterized in that said pivoting connecting element (31) is a ball joint.
PCT/FR2002/000943 2001-03-23 2002-03-15 Filtering assembly provided with means facilitating filtering cartridge replacement WO2002076570A1 (en)

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FR0103995A FR2822394B1 (en) 2001-03-23 2001-03-23 FILTER ASSEMBLY PROVIDED WITH MEANS TO FACILITATE REPLACEMENT OF THE FILTRATION CARTRIDGE
FR01/03995 2001-03-23

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DE20213512U1 (en) * 2002-09-03 2004-01-15 Hengst Gmbh & Co.Kg Filter used as an oil filter or a fuel filter for a motor vehicle comprises a housing, a removable lid, and an exchangeable filter insert having an annular cross-section and secured against rotational movements about its central axis
DE20213507U1 (en) * 2002-09-03 2004-01-15 Hengst Gmbh & Co.Kg Filter used as an oil filter or a fuel filter for a motor vehicle comprises an inner dome extending into a filter insert and having a hinged region allowing a tipping movement of the inner dome relative to a lid and/or housing
WO2014191486A1 (en) * 2013-05-28 2014-12-04 Mann+Hummel Gmbh Filter element
DE102018009187A1 (en) * 2018-11-23 2020-05-28 Hydac Filtertechnik Gmbh Filter device
WO2021047945A1 (en) * 2019-09-09 2021-03-18 Hydac Filtertechnik Gmbh Filter apparatus

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DE102015002900A1 (en) * 2015-03-09 2016-09-15 Mann + Hummel Gmbh Filter system and filter element with coupling device
DE102016007849A1 (en) * 2016-06-29 2018-01-04 Mann+Hummel Gmbh Withdrawal system and removal aid for a separation element

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DE19934378A1 (en) * 1999-07-22 2001-01-25 Mann & Hummel Filter Filter for filtering liquids, especially fuels, has riser pipe fixed in housing and provided with runback bore in geodetic upper region and runback channel

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DE4330840C1 (en) * 1993-09-11 1995-02-16 Hengst Walter Gmbh & Co Kg Filter for cleaning liquids
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Publication number Priority date Publication date Assignee Title
DE20213512U1 (en) * 2002-09-03 2004-01-15 Hengst Gmbh & Co.Kg Filter used as an oil filter or a fuel filter for a motor vehicle comprises a housing, a removable lid, and an exchangeable filter insert having an annular cross-section and secured against rotational movements about its central axis
DE20213507U1 (en) * 2002-09-03 2004-01-15 Hengst Gmbh & Co.Kg Filter used as an oil filter or a fuel filter for a motor vehicle comprises an inner dome extending into a filter insert and having a hinged region allowing a tipping movement of the inner dome relative to a lid and/or housing
WO2014191486A1 (en) * 2013-05-28 2014-12-04 Mann+Hummel Gmbh Filter element
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DE102018009187A1 (en) * 2018-11-23 2020-05-28 Hydac Filtertechnik Gmbh Filter device
WO2020104260A1 (en) 2018-11-23 2020-05-28 Hydac Filtertechnik Gmbh Filter device
WO2021047945A1 (en) * 2019-09-09 2021-03-18 Hydac Filtertechnik Gmbh Filter apparatus

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