CN211599644U

CN211599644U - Check valve and oil filter

Info

Publication number: CN211599644U
Application number: CN201922454641.5U
Authority: CN
Inventors: 乔基奥·基隆迪
Original assignee: Shanghai Sofima Automobile Filter Co ltd
Current assignee: Shanghai Sofima Automobile Filter Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-29
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a check valve and oil filter, this oil filter include the check valve, and this check valve includes disk seat and flexible diaphragm. The valve seat is provided with a flow opening, and comprises a mesh enclosure which covers the flow opening. The flexible diaphragm covers and laminates on the screen panel and the periphery of flexible diaphragm is fixed in the disk seat, has a plurality of incisions on the flexible diaphragm, and a plurality of incisions are radial setting to form a plurality of valve clacks on making the flexible diaphragm, the valve clack can be opened towards the direction of keeping away from the screen panel and make the circulation mouth link up, and the valve clack can be closed and make the circulation mouth seal. The check valve and the oil filter can reduce the impact on the check valve and the related connecting pipeline when the check valve is closed, and prolong the service life of the check valve and the related connecting pipeline.

Description

Check valve and oil filter

Technical Field

The utility model relates to a fluid conveying machinery technical field especially relates to a check valve and oil filter.

Background

The check valve is a valve that is disposed in a fluid transfer machine, such as an oil filter or a hydraulic system oil pipe, and is used for blocking a reverse flow of a fluid. For example, in an oil filter, a check valve is usually installed at an oil inlet to prevent oil in the oil filter from flowing backward into an oil feed pipe when the oil filter stops operating. However, at the moment when the oil filter stops operating, a pulse pressure is generated in the direction from the oil outlet to the oil inlet, and the check valve is suddenly closed. The large impact force generated by the sudden closing of the check valve can generate certain impact or hydraulic impact on the check valve and a pipeline communicated with the check valve, so that the damage of the check valve and the related connecting pipeline is easily caused.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a check valve and an oil filter that reduce the impact on the check valve and associated connecting lines when the check valve is closed and that extend the useful life of the check valve and associated connecting lines.

A check valve, comprising:

the valve seat is provided with a flow port and comprises a mesh enclosure, and the mesh enclosure covers the flow port; and

the flexible diaphragm covers and is attached to the mesh cover, the periphery of the flexible diaphragm is fixed on the valve seat, a plurality of notches are formed in the flexible diaphragm and radially arranged, so that a plurality of valve clacks are formed in the flexible diaphragm, the valve clacks can be opened in the direction away from the mesh cover to enable the circulation ports to be communicated, and the valve clacks can be closed to enable the circulation ports to be closed.

In the check valve, a mesh cover covering the circulation port is fixed on the valve seat, the flexible diaphragm covers and is attached to the mesh cover, and the flexible diaphragm is provided with a plurality of notches which are radially arranged, so that a plurality of valve clacks which extend from the periphery to the middle are formed on the flexible diaphragm. When a fluid conveying machine such as an oil filter works and fluid flows through the flow port, the flap-shaped flexible valve clack is easily opened in a direction away from the mesh cover under the pressure of the fluid, and the fluid can flow from one side of the flexible diaphragm to the other side of the flexible diaphragm. When the fluid conveying machinery such as an oil filter stops working, even pulse pressure from an oil outlet to an oil inlet direction is generated, the valve clacks have certain buffering capacity due to the flexible materials of the valve clacks, so that the valve clacks can be closed slowly, and the valve clacks can be closed uniformly due to the fact that the valve clacks extend from the periphery to the middle until the valve clacks are covered and attached to the net cover, so that the circulation port is covered and sealed, impact on the check valve and the related connecting pipeline when the check valve is closed is reduced, and the service life of the check valve and the related connecting pipeline is prolonged. Moreover, when the filter element of the oil conveying machine such as the oil filter is replaced, the closed valve clack can also prevent impurities on the filter element from falling into other pipelines connected with the fluid conveying machine such as the oil filter, and the like, so that pollution to the corresponding pipelines is prevented.

In one embodiment, the check valve further comprises a plurality of ribs, the ribs are arranged on the surface, covered with the flexible membrane, of the mesh enclosure, the ribs are radially arranged, the mesh enclosure between every two ribs forms a fitting area, and the shape and the number of the fitting areas are matched with the valve clack.

In one embodiment, the check valve further comprises a connecting disc, the connecting disc is arranged on the surface, covered with the flexible membrane, of the mesh enclosure, and the convex ribs converge at the connecting disc.

In one embodiment, the mesh cover has a curved surface that is convex in a direction toward the flexible membrane.

In one embodiment, the check valve further comprises a pressing ring, wherein the pressing ring is arranged on one surface, back to the mesh enclosure, of the flexible membrane and used for pressing and fixing the periphery of the flexible membrane on the valve seat.

In one of them embodiment, the check valve still includes a plurality of fasteners, be equipped with a plurality of first installation departments on the clamping ring, a plurality of first installation departments set up along the periphery circumference of clamping ring, the valve seat is equipped with a plurality of second installation departments, a plurality of second installation departments with a plurality of first installation departments one-to-one, the fastener passes first installation department with the second installation department, in order to incite somebody to action the clamping ring with flexible diaphragm is fixed in on the valve seat.

In one embodiment, the flexible membrane is a rubber membrane.

In one embodiment, the valve seat comprises a mounting platform, the mounting platform is provided with the flow opening, the mounting platform is provided with a mounting flange, the mounting flange extends towards the opening direction of the valve clack, and the mounting flange is arranged around the periphery of the flow opening in the circumferential direction.

An oil filter comprises a shell, a filter element and the check valve, wherein the shell is provided with an oil inlet and an oil outlet, the filter element is arranged in the shell, the filter element comprises a filter cartridge, the filter cartridge is enclosed into a filter cavity, the filter cartridge is provided with a liquid inlet opposite to the oil inlet, the check valve is arranged between the oil inlet and the liquid inlet, the oil outlet is positioned outside the filter cartridge, and fluid entering the shell through the oil inlet enters the filter cavity through the check valve.

In the oil filter, fluid entering the shell through the oil inlet jacks the valve clack in a direction away from the mesh enclosure, so that the circulation port is communicated, and the fluid enters the filter cavity. Then the fluid is filtered by the filter cartridge, the fluid filtered out of impurities flows out of the filter cavity through the filter holes on the filter cartridge, enters between the shell and the filter cartridge, and finally flows out of the shell from the oil outlet. The oil filter has the technical effects of reducing the impact on the check valve and the related connecting pipeline when the check valve is closed and prolonging the service life of the check valve and the related connecting pipeline.

In one embodiment, the oil filter further comprises a bypass valve, the filter element further comprises a cover body, the bypass valve comprises an elastic member, two ends of the elastic member respectively abut against the cover body and the housing, when the elastic member is not stressed, the cover body abuts against the filter cartridge, when the cover body is stressed, the cover body can move in a direction away from the filter cartridge, a gap is generated between the cover body and the filter cartridge, and the filter cavity is communicated with the oil outlet through the gap.

Drawings

Fig. 1 is a half sectional view of an oil filter according to an embodiment of the present invention;

FIG. 2 is a half sectional view of the check valve of FIG. 1;

FIG. 3 is a schematic view of the check valve of FIG. 1;

description of the reference numerals

10. The oil filter comprises an oil filter body 100, a check valve 110, a valve seat 111, a flow port 112, a mounting platform 112a, a mounting flange 113, a first boss 114, a second boss 114a, a clamping groove 115a, a rib 115b, a connecting disc 120, a flexible diaphragm 121, a valve clack 130, a pressing ring 131, a mounting sheet 140, a mounting column 200, a shell 210, an oil inlet 220, an oil outlet 230, an oil inlet pipe 231, a clamping protrusion 240, a top cover 250, an oil outlet pipe 300, a filter core 310, a filter cartridge 320, a filter cavity 330, a cover body 400, a bypass valve 410 and an elastic piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, an embodiment of the present invention provides an oil filter 10, which includes a check valve 100, a housing 200, and a filter element 300. The oil filter 10 can reduce impact on the check valve 100 and associated connecting lines when the check valve 100 is closed, and prolong the service life of the check valve 100 and associated connecting lines.

Wherein check valve 100 includes a valve seat 110 and a flexible diaphragm 120. The check valve 100 can reduce impact on the check valve 100 and associated connecting pipes when the check valve 100 is closed, and extend the service life of the check valve 100 and associated connecting pipes.

As shown in fig. 2 and 3, the valve seat 110 is provided with a communication port 111. The valve seat 110 includes a mesh cover assembly including a mesh cover (not shown) covering the flow opening 111. The flexible membrane 120 is attached to the mesh enclosure in a covering manner, the periphery of the flexible membrane 120 is fixed to the valve seat 110, the flexible membrane 120 is provided with a plurality of notches, the notches are radially arranged, so that a plurality of valve flaps 121 are formed on the flexible membrane 120, the valve flaps 121 can be opened in a direction away from the mesh enclosure to enable the circulation port 111 to be communicated, and the valve flaps 121 can be closed to enable the circulation port 111 to be sealed.

Further, the valve seat 110 includes a mounting base 112, the mounting base 112 defines a flow opening 111, the mounting base 112 is provided with a mounting flange 112a, the mounting flange 112a extends toward the opening direction of the valve flap 121, and the mounting flange 112a is circumferentially disposed around the periphery of the flow opening 111. Further, the valve seat 110 further includes a first boss 113, and the first boss 113 is disposed on a surface of the mounting base 112 on which the mounting flange 112a is disposed. In this embodiment, the first boss 113 has a cylindrical shape. Further, the valve seat 110 further includes a second boss 114, the second boss 114 is disposed on a surface of the mounting platform 112 facing away from the first boss 113, and a fastening groove 114a is disposed on an outer side surface of the second boss 114. In this embodiment, the second boss 114 is a cylindrical boss, and the engagement groove 114a is an annular groove. Specifically, the flow port 111 penetrates the first boss 113, the mount table 112, and the second boss 114 in this order.

Further, the mesh cover assembly further includes a plurality of ribs 115a, and the plurality of ribs 115a are disposed on a surface of the mesh cover covered with the flexible membrane 120. The plurality of ribs 115a are radially arranged, that is, the plurality of ribs 115a extend outwards from the center of the mesh enclosure, and the mesh enclosure between every two ribs 115a forms a fitting area, and the shape and the number of the fitting areas are matched with the valve flap 121. Each flap 121 moves within the corresponding fit region, helping the flaps 121 to open and close uniformly, and reducing deformation of the flaps 121. The plurality of flaps 121 are capable of uniformly opening from the middle of the flexible diaphragm 120 when subjected to fluid pressure, which, on the one hand, further reduces the difficulty of opening the flaps 121 and, on the other hand, helps to uniformly increase the flow rate of fluid through the check valve 100, avoiding a large impact on the interior of the oil filter 10 or other fluid transport machine.

Further, the mesh cover assembly further includes a connection pad 115b, and the connection pad 115b is disposed on a side of the mesh cover covered with the flexible membrane 120. The plurality of ribs 115a converge at the connecting pad 115b, that is, the converging ends of the plurality of ribs 115a are all connected with the connecting pad 115b, and the diverging ends of the plurality of ribs 115a all extend in a direction away from the connecting pad 115 b. The connecting plate 115b is used for connecting the rib 115a, so that the processing and forming of the rib 115a on the mesh cover are facilitated.

Specifically, the mesh cover has an arc surface that is convex in a direction approaching the flexible diaphragm 120. This setting is convenient for valve clack 121 when receiving external force to keeping away from the direction of screen panel and opening, makes things convenient for oil to pass through.

In this embodiment, the mesh cover covers an end of the first boss 113 away from the mounting platform 112, and the periphery of the mesh cover is fixed on the first boss 113.

Optionally, the flexible membrane 120 is a rubber membrane. The flexible membrane 120 is made of rubber, on one hand, the rubber has certain strength, so that the valve clack 121 can prevent oil from passing through when being closed, on the other hand, the valve clack 121 also has certain buffering capacity, and even if pulse pressure from the oil outlet 220 to the oil inlet 210 is generated, the valve clack 121 can be closed slowly, so that impact on the check valve 100 and relevant connecting pipelines is reduced. Of course, in other embodiments, the flexible membrane 120 may also be made of silicon or other materials.

Further, the check valve 100 further includes a pressing ring 130, and the pressing ring 130 is disposed on a surface of the flexible membrane 120 facing away from the mesh enclosure and presses and fixes the periphery of the flexible membrane 120 to the valve seat 110. The press ring 130 can fix the periphery of the flexible diaphragm 120 on the valve seat 110, and prevent the flexible diaphragm 120 from being separated from the valve seat 110. Specifically, the press ring 130 presses and fixes the outer periphery of the flexible membrane 120 on the first boss 113.

Further, the check valve 100 further includes a plurality of fastening members (not shown in the drawings), a plurality of first mounting portions are provided on the pressing ring 130, the plurality of first mounting portions are disposed along the circumferential direction of the pressing ring 130, a plurality of second mounting portions are provided on the valve seat 110, the plurality of second mounting portions correspond to the plurality of first mounting portions one to one, and the fastening members pass through the first mounting portions and the second mounting portions to fix the pressing ring 130 and the flexible diaphragm 120 to the valve seat 110. This setting is convenient for realize that clamping ring 130 is fixed in on valve seat 110 flexible diaphragm 120, moreover because the flexible material of flexible diaphragm 120, can reduce the stress between clamping ring 130 and the valve seat 110 of flexible diaphragm 120 both sides. Specifically, the plurality of first installation portions are a plurality of installation pieces 131 evenly arranged along the periphery of the pressure ring 130, the plurality of second installation portions are a plurality of installation posts 140 evenly arranged along the periphery of the first boss 113, and the fastening members sequentially penetrate through the installation pieces 131 and the installation posts 140 so as to fix the pressure ring 130 and the flexible diaphragm 120 on the first boss 113. In this embodiment, the fastening member is a bolt, and the mounting post 140 and the mounting piece 131 are both provided with a threaded hole matched with the bolt. Of course, in other embodiments, the fasteners may be pins, rivets or other forms.

Of course, the check valve 100 can be used in not only the oil filter 10, but also in the hydraulic system lines or other applications where it is desirable to prevent fluid flow.

Wherein, the housing 200 is provided with an oil inlet 210 and an oil outlet 220, the filter element 300 is arranged in the housing 200, the filter element 300 comprises a filter cartridge 310, the filter cartridge 310 encloses a filter cavity 320, one end of the filter cartridge 310 is provided with a liquid inlet opposite to the oil inlet 210, the check valve 100 is arranged between the oil inlet 210 and the liquid inlet, the oil outlet 220 is positioned outside the filter cartridge 310, oil entering the housing 200 through the oil inlet 210 enters the filter cavity 320 through the check valve 100

Specifically, as shown in fig. 1 and 2, the outer diameter of the mounting table 112 is larger than the caliber of the oil inlet 210. The mounting table 112 is disposed on one side of the oil inlet 210 facing the inside of the housing 200 and covers the oil inlet 210, one end of the filter cartridge 310 having the oil inlet 210 abuts against one side of the mounting table 112 facing away from the oil inlet 210, and at least a part of an outer side surface of the filter cartridge 310 abuts against an inner side surface of the mounting flange 112 a. This arrangement allows fluid entering housing 200 through inlet port 210 to pass through check valve 100 into filter cavity 320.

Specifically, housing 200 further includes an oil inlet tube 230 in communication with oil inlet 210, oil inlet tube 230 facilitating communication of oil filter 10 with an oil supply line or other line. Further, the inner wall of the oil inlet pipe 230 is provided with a catching protrusion 231 engaged with the catching groove 114 a. In this embodiment, the locking protrusion 231 is an annular protrusion. The check valve 100 is fixed to the housing 200 by the engagement of the catching protrusion 231 and the catching groove 114a, so that the check valve 100 can be prevented from being displaced or falling off when being subjected to a large hydraulic impact, and the installation stability of the check valve 100 can be ensured. Of course, other means for improving the installation stability of the check valve 100 may be used, such as a taper fit between the outer side surface of the second boss 114 and the inner wall of the oil inlet pipe 230.

Further, the oil filter 10 further includes a bypass valve 400, and the filter element 300 further includes a cover 330 covering an end of the filter cartridge 310 remote from the inlet port. The bypass valve 400 includes an elastic member 410, two ends of the elastic member 410 respectively abut against the cover 330 and the housing 200, when the elastic member 410 is not stressed, the cover 330 abuts against the filter cartridge 310, the cover 330 can move in a direction away from the filter cartridge 310 when being stressed, a gap is generated between the cover 330 and the filter cartridge 310, and the filter cavity 320 is communicated with the oil outlet 220 through the gap. When the filter cartridge 310 is blocked, the pressure inside the filter cavity 320 is gradually increased, and the bypass valve 400 can generate a gap between the filter cartridge 310 and the cover 330 when the pressure inside the filter element 300 reaches a certain value, so that the oil in the filter cavity 320 directly flows out of the filter cavity 320 through the gap, thereby preventing the filter element 300 from being broken due to excessive pressure and improving the safety of the oil filter 10. In this embodiment, the elastic member 410 is a spring. Of course, in other embodiments, the elastic member 410 may have other forms.

Specifically, the oil inlet 210 is disposed at the bottom of the housing 200, and the oil outlet 220 is disposed at the side of the housing 200. Specifically, the inlet is disposed at the bottom of the filter cartridge 310, and the cover 330 covers the top of the filter cartridge 310. The top of the housing 200 is provided with a detachable top cap 240, and two ends of the elastic member 410 are respectively connected with the cover body 330 and the top cap 240, so that the top cap 240 facilitates replacement of the filter cartridge 300.

Further, the housing 200 also includes a drain line 250 in communication with the outlet port 220, the drain line 250 facilitating communication of the oil filter 10 with a drain line or other conduit.

The check valve 100 and the oil filter 10 have at least the following advantages:

the oil filter 10 includes a check valve 100. In this oil filter 10, the fluid entering the housing 200 through the inlet port 210 pushes the valve flap 121 open in a direction away from the mesh cover, so that the flow port 111 penetrates and the fluid enters the filter chamber 320. The fluid is then filtered through the filter cartridge 310, and the filtered fluid exits the filter cavity 320 through the filter holes in the filter cartridge 310, enters between the housing 200 and the filter cartridge 310, and finally exits the housing 200 at the outlet port 220. In the check valve 100, a mesh cover covering the flow opening 111 is fixed to the valve seat 110, the flexible diaphragm 120 is attached to the mesh cover in a covering manner, and the flexible diaphragm 120 has a plurality of slits radially arranged, so that a plurality of flap-shaped valve flaps 121 extending from the periphery to the center are formed on the flexible diaphragm 120. When the oil transportation machine such as the oil filter 10 is operated and fluid flows through the communication port 111, the flap-shaped flexible valve flap 121 is easily opened away from the mesh cover by the pressure of the fluid, and the fluid is allowed to flow from one side of the flexible diaphragm 120 to the other side of the flexible diaphragm 120. When the oil transportation machine such as the oil filter 10 stops working, even if pulse pressure from the oil outlet 220 to the oil inlet 210 is generated, the valve flap 121 has certain buffering capacity due to the flexible material of the valve flap 121, so that the valve flap 121 can be closed slowly, and the valve flaps 121 can be closed uniformly until the valve flaps 121 are covered and attached on the mesh cover, so that the flow port 111 is covered and sealed, impact on the check valve 100 and relevant connecting pipelines when the check valve 100 is closed is reduced, and the service life of the check valve 100 and relevant connecting pipelines is prolonged. Furthermore, when the filter element 300 of the oil transport machine such as the oil filter 10 is replaced, the closed valve flap 121 can prevent impurities on the filter element 300 from falling into another pipe connected to the oil transport machine such as the oil filter 10, thereby preventing contamination of the corresponding pipe.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A check valve, comprising:

the flexible diaphragm covers and is attached to the mesh cover, the periphery of the flexible diaphragm is fixed on the valve seat, a plurality of notches are formed in the flexible diaphragm, the notches are radially arranged, so that a plurality of valve clacks are formed in the flexible diaphragm, the valve clacks can be opened in the direction away from the mesh cover to enable the circulation ports to be communicated, and the valve clacks can be closed to enable the circulation ports to be closed.

2. The check valve of claim 1, further comprising a plurality of ribs disposed on a side of the mesh enclosure covered by the flexible membrane, the plurality of ribs being radially disposed, the mesh enclosure between each two of the ribs forming an attachment area, the attachment areas being shaped and numbered to match the valve flap.

3. The check valve of claim 2, further comprising a connecting disc disposed on a side of the mesh enclosure covered with the flexible diaphragm, wherein the plurality of ribs converge at the connecting disc.

4. The check valve of claim 2, wherein the mesh cage has a camber that is convex in a direction toward the flexible diaphragm.

5. The check valve of claim 1, further comprising a compression ring, wherein the compression ring is arranged on a surface of the flexible membrane, which faces away from the mesh enclosure, and compresses and fixes the periphery of the flexible membrane on the valve seat.

6. The check valve of claim 5, further comprising a plurality of fasteners, wherein the pressure ring is provided with a plurality of first installation parts, the plurality of first installation parts are arranged along the circumferential direction of the pressure ring, the valve seat is provided with a plurality of second installation parts, the plurality of second installation parts correspond to the plurality of first installation parts one to one, and the fasteners penetrate through the first installation parts and the second installation parts so as to fix the pressure ring and the flexible diaphragm on the valve seat.

7. The check valve of any one of claims 1 to 6, wherein the flexible diaphragm is a rubber diaphragm.

8. The check valve of any one of claims 1 to 6, wherein the valve seat comprises a mounting platform, the mounting platform defining the flow port, the mounting platform defining a mounting flange extending in a direction in which the valve flap opens, the mounting flange being circumferentially disposed about a periphery of the flow port.

9. An oil filter comprising a housing having an oil inlet and an oil outlet, a filter element disposed in the housing, and a check valve as defined in any one of claims 1 to 8, the filter element comprising a filter cartridge enclosing a filter chamber, the filter cartridge having an inlet disposed opposite the oil inlet, the check valve being disposed between the oil inlet and the inlet, the oil outlet being located outside the filter cartridge, fluid entering the housing through the oil inlet passing through the check valve into the filter chamber.

10. The oil filter of claim 9, further comprising a bypass valve, wherein the filter element further comprises a cover, wherein the bypass valve comprises an elastic member, two ends of the elastic member respectively abut against the cover and the housing, when the elastic member is not under stress, the cover abuts against the filter cartridge, when the cover is under a certain pressure, the cover can move in a direction away from the filter cartridge, so that a gap is formed between the cover and the filter cartridge, and the filter cavity is communicated with the oil outlet through the gap.