WO2021037414A1 - Système de fermeture pour filtre à liquide - Google Patents

Système de fermeture pour filtre à liquide Download PDF

Info

Publication number
WO2021037414A1
WO2021037414A1 PCT/EP2020/066546 EP2020066546W WO2021037414A1 WO 2021037414 A1 WO2021037414 A1 WO 2021037414A1 EP 2020066546 W EP2020066546 W EP 2020066546W WO 2021037414 A1 WO2021037414 A1 WO 2021037414A1
Authority
WO
WIPO (PCT)
Prior art keywords
closure
filter
liquid
filter housing
closure body
Prior art date
Application number
PCT/EP2020/066546
Other languages
German (de)
English (en)
Inventor
Wilhelm Ardes
Original Assignee
Hengst Se
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 Hengst Se filed Critical Hengst Se
Publication of WO2021037414A1 publication Critical patent/WO2021037414A1/fr

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Classifications

    • 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
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • 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
    • 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
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/24—Tools used for the removal of filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/29—Filter cartridge constructions
    • B01D2201/291—End caps
    • 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
    • B01D2201/34—Seals or gaskets for filtering elements
    • B01D2201/347—Radial sealings

Definitions

  • the invention relates to a closure system for a liquid filter, with a closure receptacle which is configured to be positioned within a filter housing of a liquid filter, a closure body which is inserted into the closure receptacle and can be moved axially within the closure receptacle by a rotary movement, with a Axial movement of the closure body, the release of a drain opening can take place and liquid can be drained from the filter housing of the liquid filter, and an anti-rotation lock which is designed to prevent the closure body from automatically unscrewing from the closure receptacle.
  • the invention also relates to a filter insert for a liquid filter, with a hollow cylindrical filter material body, a support structure on which the filter material body is arranged, and a closure system which allows liquid to be drained from a filter housing of the liquid filter.
  • the invention relates to a liquid filter with a filter housing, a filter insert which comprises a support structure on which a filter material body is arranged, the filter insert being inserted into the filter housing, and a closure system which closes a drain opening of the filter housing and a liquid drain from the Filter housing allowed.
  • Liquid filters are used to remove particles from an operating fluid.
  • the operating fluid can be, for example, water, coolant, fuel or oil, which is used, for example, to lubricate machine parts. To remove the particles, the liquid is passed through a liquid-permeable filter material to which the particles to be removed adhere.
  • the filter housing can at least partially be designed as an open screw cap which, after the filter insert has been inserted, is screwed into a downward-facing opening in a liquid chamber.
  • the liquid chamber is usually integrated into a liquid circuit of a machine, in particular an internal combustion engine. Due to the hanging design of the liquid filter, the filter housing is also filled with liquid outside of the operating time, which must be drained off before changing the filter insert. Due to the fluctuating operating pressures within the filter housing and the necessity of regular replacement of the filter insert, high demands are placed on the closure systems of the corresponding liquid filters.
  • a liquid filter is known from the publication DE 199 61 580 A1, the closure body of which is integrated into the filter insert, so that there is no need to insert and fix the closure body separately after changing the filter insert.
  • the closure systems for liquid filters known in the prior art do not have sufficient operational reliability in the case of high pressure fluctuations within the filter housing and intense vibrations and / or require time-consuming maintenance measures when changing the filter insert.
  • the object on which the invention is based is thus to simplify the change of the filter insert of a liquid filter and at the same time to increase the operational reliability of the closure, in particular in the case of high pressure fluctuations and vibrations.
  • the object is achieved by a locking system of the type mentioned at the beginning, the anti-rotation lock of the locking system according to the invention having an axial stop which limits the axial movement of the locking body out of the locking receptacle.
  • the invention makes use of the knowledge that the operational reliability generated by an anti-rotation lock can be significantly increased if, as an alternative or in addition to the friction lock of the closure body known from the prior art, an axial stop is provided which limits the axial movement of the closure body out of the closure receptacle .
  • An automatic release of the closure body by vibrations or pressure pulsations takes place in most cases in the direction of gravity, only with a very strong pressure pulsation a release against this is also possible.
  • the axial stop ensures form-fit locking, which can only be released in the direction of gravity by deformation or damage to the form-fit partners. An automatic unscrewing of the closure body from the closure receptacle is thus effectively avoided even with constantly changing high operating pressures and sustained vibrations.
  • the anti-rotation lock which has an axial stop, can be combined with a locking receptacle which is to be positioned within the filter housing of the liquid filter.
  • the closure body can thus be inserted into the closure receptacle before the filter insert is inserted into the filter housing.
  • the closure receptacle together with the closure body can then be inserted into the filter housing together with the filter insert. Changing the filter insert is thus considerably simplified.
  • the closure body is preferably screwed into the closure receptacle.
  • the closure body of the closure system can preferably be designed as an oil drain screw.
  • the complexity of the filter construction is considerably reduced in comparison to constructions with similar operational reliability, since, for example, no detents have to be designed to implement an anti-rotation device.
  • the anti-rotation lock having an axial stop provides a robust and long-lasting lock.
  • an axial movement of the closure body can create a liquid passage through which liquid can flow out of the filter housing through a drain opening in the filter housing.
  • the closure receptacle and the closure body preferably have corresponding threaded sections.
  • the threaded sections can also fulfill a sealing function and contribute to the sealing between the clean side and the raw side of the liquid filter.
  • the axial stop of the anti-rotation lock can, for example, have a circumferential design and also contribute to sealing.
  • the closure body can have ventilation recesses, via which an exchange of air between the surroundings and the interior of the filter housing is made possible while the liquid is being drained from the filter housing.
  • the ventilation recesses can be designed, for example, in the shape of a slot.
  • the closure receptacle is connected to a support structure of a filter insert which can be inserted into the filter housing.
  • the closure receptacle is preferably attached to the carrier structure of the filter insert in a detachable or non-detachable manner.
  • the closure receptacle and / or the support structure can be formed from a plastic, a metal and / or a metal alloy.
  • the closure receptacle is an integral part of at least part of the support structure of the filter insert.
  • the closure receptacle and the part of the support structure connected to the closure receptacle are designed, for example, as a one-piece plastic injection-molded part. In this way, a durable and robust closure construction with a reduced number of parts is provided, the production effort of which is considerably reduced compared to constructions with a higher number of parts.
  • the closure receptacle is connected to the carrier structure of the filter insert in a form-fitting and / or force-fitting manner. Due to the positive and / or non-positive connection between the lock receptacle and the carrier structure, the lock receptacle is preferably connected to the carrier structure in a reversible and non-destructive releasable manner.
  • the closure receptacle can preferably be separated from the support structure of the filter insert without tools.
  • the connection between the closure receptacle and the support structure of the filter insert can be, for example, a snap connection with one or more snap hooks.
  • the closure receptacle can be designed as an exchangeable adapter, so that different closure bodies can be used in a liquid filter by using different adapters.
  • the closure receptacle can be fixed within the filter housing via one or more snap hooks.
  • the closure receptacle preferably has for this purpose one or more material projections which extend in the radial direction and which can be brought into engagement with the one or more snap hooks.
  • a locking receptacle is preferred which has a circumferential fastening web which extends outward in the radial direction and which can be brought into engagement with the one or more snap hooks.
  • the one or more snap hooks can be an integral part of the filter housing or can be attached to the filter housing. The snap connection allows quick assembly and disassembly of the filter insert and provides a non-destructive and reversibly detachable connection.
  • the axial stop of the anti-rotation lock comprises a stop surface and a contact surface, the axial distance of which can be changed via a rotary movement of the locking body.
  • the stop surface and the contact surface of the axial stop of the anti-rotation lock can be brought into contact and out of contact via a rotational movement of the closure body.
  • the contact surface is preferably moved axially, the position of the stop surface not being changeable via the rotational movement of the closure body.
  • the closure body for draining liquid from the filter housing of the liquid filter is designed to be rotatable into the filter housing.
  • the axial stop of the anti-rotation lock preferably comprises a projection on the closure body which extends outward in the radial direction and which strikes a stop surface when the closure body is unscrewed.
  • a direct axial stop is implemented for the closure body, which prevents the closure body from rotating out of its own accord, for example due to pressure fluctuations and / or vibrations.
  • the projection on the closure body provides a contact surface which is in contact with the stop surface in the stop state.
  • the projection, the contact surface and / or the stop surface can be designed circumferentially.
  • the contact area and / or the Stop surfaces can be inclined to the orthogonal to the axial direction.
  • the axial direction extends preferably parallel or in alignment with the longitudinal axis of the closure body and / or with the central axis of the outlet opening of the filter housing.
  • the stop surface against which the projection on the closure body strikes when the closure body is unscrewed is part of a support structure of a filter insert which can be replaced in the filter housing.
  • the stop surface can be arranged on an end face of a cylindrical section of the support structure facing away from the drain opening.
  • the cylindrical section can be a collar surrounding the closure body and / or have a threaded section on its inside, into which a corresponding threaded section of the closure body is screwed.
  • the cylindrical section of the support structure preferably extends upwards from a lower end disk of the support structure away from the outlet opening of the filter housing.
  • a closure system according to the invention is also advantageous in which the stop surface against which the projection on the closure body strikes when the closure body is unscrewed is part of the filter housing.
  • the stop surface can be arranged on an end face of a cylindrical section of the filter housing facing the drain opening.
  • the outlet opening of the filter housing is preferably arranged opposite an insertion opening of the filter housing, via which the filter insert, preferably together with the closure receptacle and closure body, can be inserted into the filter housing.
  • the closure body for draining liquid from the filter housing of the liquid filter is designed to be rotatable out of the filter housing.
  • the axial stop of the anti-rotation lock preferably comprises a circumferential seal which is arranged on the closure body and strikes a stop surface when the closure body is unscrewed. It becomes a indirect axial stop for the closure body implemented via the circumferential seal, which prevents the closure body from automatically unscrewing, for example due to pressure fluctuations and / or vibrations.
  • a circumferential seal receptacle, within which the circumferential seal is arranged, is preferably provided on the closure body.
  • the seal receptacle can be a circumferential receiving groove.
  • the seal can be an O-ring.
  • the stop surface is against which the seal arranged on the closure body when unscrewing the
  • Closing body strikes, part of a radially inwardly or outwardly extending projection.
  • the seal provides a contact surface which, in the stop state, is in contact with the stop surface of the projection.
  • the projection, the contact surface and / or the stop surface can be designed circumferentially.
  • the contact surface and / or the stop surface can be inclined to the orthogonal to the axial direction.
  • the projection extending inwards or outwards in the radial direction is part of the filter housing or a support structure of a filter insert which can be inserted into the filter housing.
  • the filter housing or the support structure of the filter insert thus provides the stop surface of the axial stop.
  • the projection is preferably arranged in the area of the outlet opening of the filter housing.
  • a closure system according to the invention is advantageous in which the seal arranged on the closure body is designed to be deformable in such a way that a deformation of the seal which can be caused when the closure body is subjected to a dismantling torque dissolves the axial stop. The seal is already slightly compressed in the operating state, so that the seal has a sufficient sealing effect.
  • the closure body including the seal When the closure body is removed, the seal is placed over the im Operational state present compression deformed beyond. In this way, the closure body including the seal can be removed. When the filter element and / or the liquid is changed, the closure body including the seal can be removed and replaced. There is no need for a separate, complex removal of the seal, so that changing the seal is considerably simplified.
  • the axial force which acts on the seal when the dismantling torque is applied to the closure body is greater than the pressure force which acts on the seal when the liquid filter is operating properly. In this way, compression of the seal which would break up the axial stop is avoided during proper operation of the liquid filter.
  • the support structure of the filter insert is preferably made of plastic and can be in one piece or in several pieces.
  • the support structure can have a first end disk which is arranged on a first end face of the filter material body. Furthermore, the support structure can have a second end disk which is arranged on a second end face of the filter material body, the first end face and the second end face of the filter material body being arranged opposite one another.
  • the first end disk and the second end disk can be connected to one another via a support sleeve.
  • the carrier sleeve can be designed as a so-called support dome.
  • the object on which the invention is based is also achieved by a liquid filter of the type mentioned at the outset, wherein the closure system of the liquid filter according to the invention is designed according to one of the embodiments described above or wherein the filter insert of the liquid filter according to the invention is designed according to one of the above described embodiments is formed.
  • the advantages and modifications of the liquid filter according to the invention reference is first made to the advantages and modifications of the closure system according to the invention and to the advantages and modifications of the filter insert according to the invention.
  • the filter housing of the liquid filter can, for example, be cup-shaped.
  • the filter housing preferably has an insertion opening for inserting a filter insert, the insertion opening being located on the opposite side of the outlet opening of the filter housing.
  • the filter housing is designed as a screw cap which can be screwed into an opening of a liquid chamber, wherein the liquid chamber can be integrated into a liquid circuit of a work machine, in particular an internal combustion engine.
  • the fluid circuit can be an oil circuit.
  • the liquid can be oil, for example.
  • the closure system can not only be used for draining the medium to be filtered itself, but can alternatively also be used for a liquid to be separated from the medium, such as water from fuel.
  • the filter can also be provided for gaseous media, such as air, combustion gases or crankcase gases, from which, for example, water or oil is separated.
  • a liquid filter is understood to be any filter from which liquid has to be drained.
  • FIG. 1 shows an embodiment of the locking system according to the invention in a perspective view
  • FIG. 2 shows a filter insert according to the invention with the closure system depicted in FIG. 1 during insertion into a filter housing of a liquid filter in a sectional side view
  • FIG. 3 shows a liquid filter according to the invention with the filter insert shown in FIG. 2 in a lateral sectional illustration
  • FIG. 4 shows the liquid filter depicted in FIG. 3 during the discharge of liquid from the filter housing in a sectional side view
  • FIG. 5 shows the liquid filter depicted in FIG. 3 during the discharge of liquid from the filter housing in a sectional side view
  • FIG. 4 shows the liquid filter depicted in FIG. 3 during the discharge of liquid from the filter housing in a sectional side view
  • FIG. 5 shows the liquid filter depicted in FIG. 3 during the discharge of liquid from the filter housing in a sectional side view
  • FIG. 6 shows the removal of the filter insert from the liquid filter depicted in FIG. 3 in a lateral sectional illustration
  • 7 shows a closure receptacle and a closure body of a closure system according to the invention in a perspective illustration
  • FIG. 8 shows a filter insert according to the invention with the closure receptacle and the closure body from FIG. 7 during the insertion into a filter housing of a liquid filter in a lateral one
  • FIG. 9 shows a liquid filter according to the invention with the filter insert shown in FIG. 8 in a lateral sectional illustration
  • FIG. 10 shows the liquid filter depicted in FIG. 9 during the discharge of liquid from the filter housing in a sectional side view
  • FIG. 11 shows the liquid filter depicted in FIG. 9 during the discharge of liquid from the filter housing in a sectional side view
  • FIG. 12 shows the removal of the filter insert from the liquid filter shown in FIG. 9 in a lateral sectional illustration
  • FIG. 13 shows a closure receptacle and a closure body of a closure system according to the invention in a perspective illustration
  • FIG. 14 shows a filter insert according to the invention with the closure receptacle and the closure body from FIG. 13 during insertion into a filter housing of a liquid filter in a sectional side view;
  • FIG. 15 shows a liquid filter according to the invention with the filter insert shown in FIG. 14 in a lateral sectional illustration;
  • FIG. 16 shows a detailed illustration of the closure system of the liquid filter depicted in FIG. 15;
  • FIG. 16 shows a detailed illustration of the closure system of the liquid filter depicted in FIG. 15;
  • FIG. 17 shows a further detailed illustration of the closure system of the liquid filter depicted in FIG. 15;
  • FIG. 18 shows the liquid filter depicted in FIG. 15 during the discharge of liquid from the filter housing in a lateral
  • FIG. 19 shows the removal of the filter insert from the liquid filter depicted in FIG. 15 in a lateral sectional illustration
  • FIG. 20 shows a closure receptacle and a closure body of a closure system according to the invention in a perspective illustration
  • FIG. 21 shows a filter insert according to the invention with the closure receptacle and the closure body from FIG. 20 during insertion into a filter housing of a liquid filter in a sectional side view
  • FIG. 22 shows a liquid filter according to the invention with the filter insert shown in FIG. 21 in a lateral sectional illustration
  • FIG. 23 shows a detailed illustration of the closure system of the liquid filter depicted in FIG. 22;
  • FIG. 24 shows a further detailed illustration of the closure system of the liquid filter depicted in FIG. 22;
  • FIG. 25 shows the liquid filter depicted in FIG. 22 during the discharge of liquid from the filter housing in a sectional side view
  • FIG. 26 shows the removal of the filter insert from the liquid filter shown in FIG. 22 in a lateral sectional illustration.
  • FIG. 1 shows a closure system 10 for a liquid filter 200, the closure system 10 having a closure receptacle 12 and a closure body 14.
  • the closure receptacle 12 and the closure body 14 are designed as plastic injection molded parts. Alternatively, the closure receptacle and / or the closure body 14 can also be made of metal.
  • the closure receptacle 12 is designed to be positioned within a filter housing 202 of the liquid filter 200.
  • the closure body 14 can be screwed into a recess in the closure receptacle 12. For this purpose, the closure receptacle 12 and the closure body 14 have corresponding threaded sections 16a, 16b. By rotating the closure body 14, the closure body 14 can be moved axially within the closure receptacle 12.
  • Ventilation recesses 30 are arranged on the closure body 14, which allow air to be exchanged between the surroundings and the inner region of the filter housing 202 during the discharge of liquid from the filter housing 202 of the liquid filter 200.
  • the ventilation recesses 30 are designed as elongated slots.
  • FIG. 2 shows a filter insert 100 which comprises the closure system 10 shown in FIG. 1.
  • the closure receptacle 12 is part of a carrier structure 102 of the filter insert 100, a hollow cylindrical filter material body 106 being arranged on the carrier structure 102.
  • the carrier structure 102 is formed in several parts, only the part comprising the closure receptacle 12 being shown.
  • the part of the support structure 102 comprising the closure receptacle 12 has a lower end disk 104 which is arranged on a lower end face of the filter material body 106.
  • the support structure 102 can furthermore have a second end plate 108, which is attached to the upper
  • the end face of the filter material body 106 is arranged.
  • the upper end disk 108 is not shown in FIG. 2.
  • the locking body 14 is screwed into the locking receptacle 12.
  • the screwing of the closure body 14 into the closure receptacle 12 can take place by means of a tool inserted into the assembly recess 42.
  • Hand-tight tightening which is usually sufficient for proper operation, can also be done by turning the locking body 14 and locking receptacle 12 by hand.
  • the closure body 14 can also be inserted into the closure receptacle 12 before the filter insert 100 is assembled, i.e. before the filter material body 106 is attached to the end plate 104.
  • the filter insert 100 is to be inserted through the insertion opening 206 of the filter housing 202 into the interior of the filter housing 202.
  • the filter housing 202 is designed as a screw cap and has a side opposite the insertion opening 206 Drain opening 204, through which the liquid can be drained from the liquid filter 200.
  • the filter housing 202 can be screwed into an opening of a liquid chamber via a mounting thread 210.
  • the filter housing 202 comprises several support pins 208a-208g, on which the lower end plate 104 of the filter insert 100 is to be placed during the insertion process.
  • FIG. 3 shows the filter insert 100 after it has been inserted into the filter housing 202 of the liquid filter 200.
  • Closure system 10 has an axial stop 15, described further below, which the axial movement of the closure body 14 from the
  • Lock receptacle 12 limited out. Thus it becomes an automatic
  • Unscrewing the closure body 14 is prevented by the axial stop 15 even in the event of high pressure fluctuations within the filter housing 202 and / or intense vibrations.
  • the axial stop 15 of the anti-rotation lock comprises a projection 18 on the closure body 14 that extends outward in the radial direction.
  • the projection 18 provides a contact surface 20 which is in contact with a stop surface 22 in the stop state. The axial distance of the
  • the stop surface 22 and the contact surface 20 can be changed via a rotary movement of the closure body 14.
  • the stop surface 22 and the contact surface 20 can thus be brought into contact via a rotary movement of the closure body 14 when the closure body 14 is inserted.
  • the stop surface 22 and the contact surface 20 can also be brought out of contact by means of an opposite rotary movement.
  • the contact surface 20 and the stop surface 22 form a sealing bond upon contact; for this purpose, one or both surfaces can also be designed to be slightly flexible. A clean side and a raw side of the filter element 100 are thus securely separated from one another. Upon dissolution of the contact of the Contact surface 20 and stop surface 22 this seal is no longer given and pure oil can run down through the thread.
  • the contact surface 20 and the stop surface 22 are designed to be circumferential and inclined to the orthogonal to the axial direction.
  • the stop surface 22, against which the projection 18 on the closure body 14 strikes when the closure body 14 is unscrewed, is part of the support structure 102 of the filter insert 100.
  • the stop surface 22 is arranged on an end face of a cylindrical section 32 of the support structure 102 facing away from the drain opening 204.
  • the cylindrical section 32 is a collar surrounding the closure body 14 and has on its inside a threaded section 16a into which a corresponding threaded section 16b of the closure body 14 is screwed.
  • the cylindrical section 32 of the support structure 102 extends from the lower end disk 104 of the support structure 102 upwards away from the drain opening 204.
  • FIG. 4 shows the liquid filter 200 during the discharge of liquid from the filter housing 202.
  • a tool 300 was inserted into the central recess 28 (cf. FIG. 1) in order to close the closure body 14 relative to the closure receptacle 12 by means of the tool 300 twist.
  • the closure body 14 is to be screwed into the filter housing 202 in order to drain liquid from the filter housing 202 of the liquid filter 200.
  • the thread is designed in such a way that it is turned in counterclockwise, that is to say that an operator uses the tool 300 in the usual way to loosen it. In this way, accidental damage due to incorrect operation is avoided.
  • the axial stop 15 of the anti-rotation lock comprises a projection 18, which extends outward in the radial direction, on the closure body 14 and which merely prevents the closure body 14 from being unscrewed downwards, ie in the direction of gravity.
  • the axial travel of the closure body 14 upwards is not restricted by the axial stop 15.
  • the liquid located in the filter housing 202 can flow off via the drainage channels 26a - 26c of the closure body 14 and the central recess 28 through the drainage opening 204 of the filter housing 202.
  • the ventilation recesses 30 (cf. FIG. 1) on the closure body 14 ensure an exchange of air between the environment and the interior of the filter housing 202.
  • FIG. 6 shows the removal of the filter insert 100 after the liquid has been drained from the filter housing 202. Since the closure body 14 is still screwed into the closure receptacle 12, when the filter insert 100 is changed, a unit of filter insert 100 and closure body 14 is removed. The removed closure body 14 can, preferably after changing the seal 24, be used with a new filter insert. When the filter insert 100 is changed, the closure body 14 including the seal 24 is preferably also replaced. If the closure body 14 is made of plastic, it does not have to be removed from the closure receptacle 12 and can be disposed of together with the filter insert 100, since incineration occurs together with the filter insert 100 is possible. A new filter insert 100 then sensibly already comprises a new closure body 14 with a new seal 24, so that an operator only has to insert the filter insert 100, i.e. simplified operation is achieved.
  • FIG. 7 shows a closure receptacle 12 and a closure body 14 of an alternative closure system 10.
  • the closure receptacle 12 and the closure body 14 again have corresponding threaded sections 16a, 16b.
  • In the illustrated combination of lock receptacle 12 and Closure body 14 is no direct axial stop 15 between the
  • Closure body 14 and the closure receptacle 12 implemented.
  • Closure system 10 with an axial stop 15 is only formed in combination with a filter housing 202.
  • the closure receptacle 12 has a circumferential collar which terminates with a sealing lip 23.
  • the filter housing 202 in which the filter insert 100 together with the closure receptacle 12 and closure body 14 is to be inserted, has a stop surface 212.
  • the stop surface 212 is on one of the
  • Drain opening 204 applied end face of a cylindrical portion 214 of the filter housing 202 is arranged.
  • the sealing lip 23 lies fully against a suitable surface of the closure body 14 and thus seals the clean side of the filter insert 100 from the unfiltered side.
  • FIG. 9 shows the filter insert 100 in the inserted state.
  • the closure body 14 is to be screwed again into the filter housing 202 in order to drain liquid from the filter housing 202 of the liquid filter 200.
  • Closure system 10 has an outwardly extending projection 18 on the closure body 14, which strikes the stop surface 212 of the filter housing 202 when attempting to unscrew the closure body 14.
  • An axial stop 15 is thus implemented between the closure body 14 and the filter housing 202.
  • the contact surface 20 provided by the projection 18 and the stop surface 212 of the filter housing 202 are designed to be circumferential and inclined to the orthogonal to the axial direction.
  • the axial stop 15 prevents the closure body 14 from being automatically unscrewed from the closure receptacle 12 even in the event of large pressure fluctuations within the filter housing 202 or intense vibrations.
  • the closure body 14 is rotated by means of the tool 300 inserted into the central recess 28 and thus moved axially into the filter housing 202. Due to the axial movement of the closure body 14 the circumferential seal 24 designed as an O-ring is disengaged. The sealing lip 23 is also no longer in contact with the closure body 14.
  • the liquid in the filter housing 202 can then flow off via the drain channels 26a-26c of the closure body 14 and the central recess 28 through the drain opening 204 of the filter housing 202, as shown in FIG. 11 is.
  • FIG. 12 shows the removal of the filter insert 100 including the closure body 14 after the liquid has been drained from the filter housing 202.
  • the closure body 14 can be rotated downward out of the filter insert 100 and, preferably after changing the seal 24, can be used with a new filter insert 100 .
  • a new closure body 14 including a new seal 24 can also be used; for this purpose, the new closure body 14 can also already be provided in the new filter insert 100.
  • closure receptacle 12 shows a further combination of closure receptacle 12 and closure body 14, closure receptacle 12 and closure body 14 again having corresponding threaded sections 16a, 16b.
  • 14 shows that the closure receptacle 12 is part of a carrier structure 102 of a filter insert 100.
  • the support structure 102 has a lower end disk 104 and an upper end disk 108, which are connected to one another via a support sleeve 110, a so-called support dome.
  • a hollow cylindrical filter material body 106 is arranged on the support structure 102.
  • the closure receptacle 12 is designed as a component of the multi-part carrier structure 102.
  • the locking receptacle 12 has a circumferential fastening web 34 which extends outward in the radial direction and via which a snap connection with the snap hooks 216a, 216b of the filter housing 202 can be implemented.
  • 15 shows the filter insert 100 in the inserted state, the snap hooks 216a, 216b of the filter housing 202 being in engagement with the fastening web 34 of the locking receptacle 12.
  • the liquid located in the filter housing 202 is prevented from escaping through the drain opening 204 via the circumferential seal 24, which is designed as an O-ring.
  • the closure system 10 of the liquid filter 200 likewise has an anti-rotation lock which prevents the closure body 14 from being automatically unscrewed from the closure receptacle 12.
  • the closure body 14 is to be screwed out of the filter housing 202 in order to drain liquid from the filter housing 202 of the liquid filter 200.
  • the axial stop 15 is formed by the circumferential seal 24 and a radially inwardly extending circumferential projection 218 on the wall of the drain opening 204, against which the seal 24 strikes when the closure body 14 is unscrewed.
  • 17 shows that the projection 218, which extends inward in the radial direction, has a stop surface 220, against which the seal 24 arranged on the closure body 14 strikes when the closure body 14 is unscrewed.
  • the closure body 14 has a circumferential seal receptacle 36 within which the circumferential seal 24 is arranged.
  • the seal receptacle 36 is designed as a circumferential receiving groove. 17 also shows that the closure receptacle 12 has a circumferential contact surface 40 which, in the inserted state of the filter insert 100, is in contact with a support surface 222 of the filter housing, so that the
  • Lock receptacle 12 is fixed via the snap hooks 216a, 216b and the circumferential support surface 222.
  • the seal 24 arranged on the closure body 14 is designed to be deformable in such a way that a deformation of the seal 24 that can be caused when the closure body 14 is subjected to a dismantling torque dissolves the axial stop 15.
  • a dismantling torque can, for example, with The tool 300 shown in FIG. 18 can be applied to the closure body 14.
  • the seal 24 is additionally compressed due to the circumferential projection 218 on the wall of the drain opening 204, the additional compression being required to release the axial stop 15.
  • the force required for upsetting is greater than the forces that could result from vibrations or pressure pulsation. This provides an effective anti-rotation lock.
  • a shear edge can also be provided on the filter housing 202, which makes it easier to destroy the seal 24.
  • the closure receptacle 12 is held on the lower end disk 104 via webs. After removal of the closure element 14, the liquid can flow through the gaps formed between the webs into the receiving space delimited by the thread 16a and through this to the drainage opening 204. Alternatively, however, an opening for the liquid could also be provided between the receiving space delimited by the thread 16a and the wall of the drain opening 204.
  • FIG. 19 shows how the filter insert 100 together with the closure receptacle 12 is removed from the filter housing 202 after the liquid has been drained.
  • the closure receptacle 12 shown in FIG. 20 can be attached to a lower end disk 104 of a support structure 102 in a reversible and non-destructive manner.
  • the end plate 104 has snap hooks 112a - 112d, which can be brought into engagement with recesses in the lock receptacle 12.
  • spring wings 38a-38d which are supported on the end disk 104, the closure receptacle 12 provides a bracing against the
  • the closure receptacle 12 is connected to the carrier structure 102 of the filter insert 100 in a form-fitting and reversibly releasable manner.
  • the locking receptacle 12 functions as an exchangeable adapter, so that different locking bodies 14 can be used by using different adapters.
  • FIG. 22 shows the filter insert 100 in the inserted state.
  • the seal 24 prevents the liquid located in the filter housing 202 from flowing out of the filter housing 202 through the drain opening 204.
  • the filter housing 202 has a projection 218 in the area of the drain opening 204, which has a stop surface 220.
  • an anti-rotation lock is again implemented with an axial stop 15, with which an automatic unscrewing of the closure body 14 from the closure receptacle 12 is prevented.
  • the closure receptacle 12 is again supported with the contact surface 40 on the support surface 222 of the filter housing 202.
  • a dismantling torque is to be applied to the closure body 14 via the tool 300, the dismantling torque causing a deformation of the seal 24 at which the axial stop 15 is dissolved.
  • the dismantling torque thus ensures an additional compression of the seal, which allows the closure body 14 together with the seal 24 to be removed.
  • the closure receptacle 12 When the filter insert 100 is removed from the filter housing 202, as shown in FIG. 26, the closure receptacle 12 is removed at the same time. Due to the reversibly detachable connection between the carrier structure 102 of the filter insert 100 and the closure receptacle 12, the closure receptacle 12 can continue to be used when the filter insert 100 is changed or can be replaced by another closure receptacle 12.
  • Reference number

Abstract

L'invention concerne un système de fermeture (10) pour un filtre à liquide (200), ce système comprenant un logement de fermeture (12) qui est conçu pour être disposé à l'intérieur d'un boîtier (202) du filtre à liquide (200), un corps de fermeture (14) qui s'insère dans le logement de fermeture (12) et peut être déplacé axialement à l'intérieur du logement de fermeture (12) par un mouvement de rotation, un mouvement axial du corps de fermeture (14) permettant d'évacuer du liquide du boîtier (202) du filtre à liquide (200), ainsi qu'un dispositif antidesserrage qui est conçu pour empêcher un dévissage automatique du corps de fermeture (14) hors du logement de fermeture (12).
PCT/EP2020/066546 2019-08-27 2020-06-16 Système de fermeture pour filtre à liquide WO2021037414A1 (fr)

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DE102019122882.4 2019-08-27
DE102019122882.4A DE102019122882A1 (de) 2019-08-27 2019-08-27 Verschlusssystem für einen Flüssigkeitsfilter

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WO2021037414A1 true WO2021037414A1 (fr) 2021-03-04

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EP4056254A1 (fr) * 2021-03-11 2022-09-14 Brita GmbH Cartouche de filtre

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DE19961580A1 (de) 1999-12-21 2001-06-28 Mann & Hummel Filter Flüssigkeitsfilter mit Ablaß für Flüssigkeitsrückstände
US20110073537A1 (en) * 2007-10-17 2011-03-31 Caterpillar, Inc. Canister Filter System With Drain That Cooperates With Filter Element
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US20150202552A1 (en) * 2014-01-23 2015-07-23 Caterpillar Inc. Liquid filter drain with integral air vent
DE102014201887A1 (de) 2014-02-03 2015-08-06 Mahle International Gmbh Verschlusssystem für einen Behälter
WO2017105837A1 (fr) * 2015-12-16 2017-06-22 Caterpillar Inc. Système de filtre utilisant une purge auto-ventilée

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US6972092B1 (en) * 2003-05-16 2005-12-06 Wix Filtration Corp. Self-venting valve end cap and method
US20170080365A1 (en) * 2015-09-22 2017-03-23 Caterpillar Inc. End cap for filter element

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DE19961580A1 (de) 1999-12-21 2001-06-28 Mann & Hummel Filter Flüssigkeitsfilter mit Ablaß für Flüssigkeitsrückstände
US20110073537A1 (en) * 2007-10-17 2011-03-31 Caterpillar, Inc. Canister Filter System With Drain That Cooperates With Filter Element
US20120080372A1 (en) * 2010-10-01 2012-04-05 Caterpillar Inc. Filter System with Fuel-Water Separator
US20140284266A1 (en) * 2013-03-22 2014-09-25 Caterpillar Inc. Filter assembly
US20150202552A1 (en) * 2014-01-23 2015-07-23 Caterpillar Inc. Liquid filter drain with integral air vent
DE102014201887A1 (de) 2014-02-03 2015-08-06 Mahle International Gmbh Verschlusssystem für einen Behälter
WO2017105837A1 (fr) * 2015-12-16 2017-06-22 Caterpillar Inc. Système de filtre utilisant une purge auto-ventilée

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Publication number Priority date Publication date Assignee Title
EP4056254A1 (fr) * 2021-03-11 2022-09-14 Brita GmbH Cartouche de filtre
WO2022189399A1 (fr) * 2021-03-11 2022-09-15 Brita Gmbh Cartouche filtrante

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