CN211230676U

CN211230676U - Check valve for filter and filter

Info

Publication number: CN211230676U
Application number: CN201922137977.9U
Authority: CN
Inventors: 李蕾; 何晓峰; 卢增彩; 赵旻; 徐辉
Original assignee: Shanghai Fleetguard Filter Co ltd
Current assignee: Shanghai Fleetguard Filter Co ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-08-11
Anticipated expiration: 2029-12-03

Abstract

The utility model relates to a filtration equipment technical field discloses a check valve and filter for filter. The check valve is configured to be arranged in the oil inlet of the filter so as to prevent oil entering the filter through the oil inlet from flowing back from the oil inlet; the check valve comprises a valve seat and a diaphragm, wherein an oil hole is further formed in the valve seat, the diaphragm cover is arranged on one side, facing the inside of the filter, of the valve seat, and the diaphragm can be lifted by oil passing through the oil hole to enter the filter. The utility model provides a filter, through locating the check valve in oil inlet hole department, make the fluid in the filter can not flow back from the oil inlet hole, avoid the internal-combustion engine unstable when starting; and the valve seat of the check valve is clamped with the hole wall of the oil inlet hole, so that the check valve is convenient to install in a small space, and the check valve is ingenious and reliable in structural design.

Description

Check valve for filter and filter

Technical Field

The utility model relates to a filtration equipment technical field especially relates to a check valve and filter for filter.

Background

The filter can be divided into: fuel filter, engine oil filter, air filter, etc. The fuel filter is used for filtering fuel in an internal combustion engine system and is used for filtering harmful particles and moisture in the fuel so as to protect the fuel system, an oil nozzle and the like.

In some internal combustion engine systems, fuel from a fuel tank is filtered by a fuel filter and the filtered fuel is injected into a cylinder of the internal combustion engine by a high pressure fuel pump. If the internal combustion engine stops for a long time, fuel oil in the filter can flow back to the oil tank from the oil inlet hole of the filter, so that a large amount of air enters the filter; when the internal combustion engine system is restarted, air in the filter is also discharged, thereby causing unstable starting of the internal combustion engine.

SUMMERY OF THE UTILITY MODEL

Based on the above, an object of the utility model is to provide a check valve and filter for filter prevents the fluid backward flow in the filter to make internal-combustion engine system's start-up stable.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a check valve for a filter is configured to be disposed in an oil inlet of the filter to prevent oil introduced into the filter through the oil inlet from flowing back from the oil inlet;

the check valve comprises a valve seat and a diaphragm, an oil passing hole is further formed in the valve seat, the diaphragm cover is arranged on one side, facing the inside of the filter, of the valve seat, and oil passing through the oil hole can be lifted up to enable the diaphragm to enter the filter.

Preferably, the valve seat is provided with a clamping head arranged along the circumferential direction of the valve seat, and the clamping head is used for being clamped in an oil inlet clamping groove in the wall of the oil inlet hole.

Preferably, the peripheral surface of the valve seat is provided with a groove extending along the circumferential direction of the valve seat, a sealing ring is arranged in the groove, and the sealing ring is used for being clamped between the hole wall of the oil inlet and the bottom wall of the groove.

Preferably, the membrane is made of an elastic material.

Preferably, the central part of the valve seat is provided with a clamping hole, one side of the membrane, which is away from the interior of the filter, is provided with an inserting shaft, and the inserting shaft penetrates through the clamping hole and is clamped in the clamping hole.

Preferably, the insert shaft is internally provided with a blind hole, and the blind hole is arranged on one side of the diaphragm facing the interior of the filter.

Preferably, the peripheral surface of the insertion shaft is provided with an insertion shaft clamping groove extending along the circumferential direction of the insertion shaft, and the hole wall of the clamping hole is clamped in the insertion shaft clamping groove.

Preferably, the inserted shaft has a guide section and an installation section, the guide section passes through the installation section connect in the diaphragm, and pass through the installation section joint in the card hole, the guide section with the junction of installation section is equipped with transition inclined plane.

The utility model provides a filter, includes above arbitrary scheme the check valve, the inlet port draw-in groove is followed the circumference of the inlet port of filter extends, the dop joint in the inlet port draw-in groove.

Preferably, the dop is located one side that the disk seat deviates from the filter inside, the dop slope sets up, by keeping away from the one end of inlet port thread groove bottom surface is to being close to the one end of inlet port thread groove bottom surface inclines to the direction of keeping away from the filter inside.

The utility model has the advantages that:

the utility model provides a check valve for a filter and a filter, which ensures that oil liquid in the filter can not flow back from an oil inlet hole by arranging the check valve at the oil inlet hole, and avoids the instability of an internal combustion engine used with the filter when starting; and the valve seat of the check valve is clamped with the hole wall of the oil inlet hole, so that the check valve is convenient to install in a small space, and the check valve is ingenious and reliable in structural design.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a cross-sectional view of a filter;

FIG. 2 is a partial view of area A of FIG. 1;

FIG. 3 is a front view of the valve seat;

FIG. 4 is a side view of the valve seat;

fig. 5 is a three-dimensional view of a diaphragm.

In the figure:

1-a check valve; 10-a housing; 100-oil inlet hole; 101-oil inlet hole clamping groove; 102-oil inlet quick connector; 103-oil outlet quick connector;

11-a valve seat; 110-chuck; 111-oil passing holes; 112-a groove; 1120-sealing ring; 113-a clamping hole;

12-a membrane; 120-blind hole; 121-insert shaft; 1210-shaft insertion clamping groove; 1211-a guide section; 1212-a mounting section; 1213-transition bevel;

2-a filter element; 3-central tube.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the present embodiment provides a check valve 1 for a filter and a filter. An oil inlet 100 and an oil outlet are formed in a shell 10 of the filter, and a check valve 1 is arranged in the oil inlet 100 to prevent oil entering the shell 10 through the oil inlet 100 from flowing back through the oil inlet 100; an oil inlet quick connector 102 for introducing oil is arranged at the oil inlet 100; an oil outlet quick connector 103 for leading out oil is arranged at the oil outlet.

The housing 10 is provided with a filter element 2 and a center tube 3. The filter element 2 is a cylindrical filter paper element, the central part of the filter element 2 is provided with a central tube 3 which is coaxial with the filter element 2, and the central tube 3 is communicated with the quick-connection-peg 103 of the oil outlet. The oil is delivered into the casing 10 from the oil inlet quick connector 102, enters the central part of the filter element 2 after being filtered by the filter element 2, is delivered into the central tube 3 through a plurality of small holes densely distributed on the central tube 3, and is output through the oil outlet quick connector 103 to complete the filtering.

Still referring to fig. 1 and 2, the check valve 1 includes a valve seat 11 and a diaphragm 12. The valve seat 11 is clamped in the oil inlet 100, and a plurality of oil passing holes 111 (see fig. 3) are arranged on the valve seat 11; the diaphragm 12 covers the valve seat 11 on the side facing the interior of the housing 10.

When the filter filters oil, the oil passing through the oil hole 111 can lift the membrane 12 to enter the filter; when the filter stops working, the pressure applied to the diaphragm 12 by the oil in the housing 10 causes the diaphragm 12 to be closely attached to the side of the valve seat 11 facing the inside of the housing 10, so as to close the plurality of oil passing holes 111 to prevent the oil from flowing back.

Specifically, the diaphragm 12 is fixedly mounted on the valve seat 11, and the diaphragm 12 is made of an elastic material, so that oil entering the housing 10 through the oil hole 111 can open the diaphragm 12, and oil in the housing 10 can press the diaphragm 12 when the filter is in a pause state.

An oil inlet clamping groove 101 and a step which extend along the circumferential direction of the oil inlet 100 are arranged on the wall of the oil inlet 100; the valve seat 11 is provided with a clamping head 110 arranged along the circumferential direction of the valve seat 11, the clamping head 110 has elasticity and is clamped in the oil inlet clamping groove 101, and the clamping head 110 is arranged on one side of the valve seat 11, which is far away from the inside of the shell 10; one side edge of the valve seat 11 facing the inside of the housing 10 abuts on the step, and positions the valve seat 11 axially together with the cartridge 110. The plurality of chucks 110 are uniformly distributed along the circumference of the valve seat 11, so that the chucks 110 are firmly clamped with the oil inlet clamping grooves 101.

The cartridge 110 is inclined from an end away from the bottom surface of the inlet port locking groove 101 to an end close to the bottom surface of the inlet port locking groove 101, in a direction away from the inside of the housing 10 (see fig. 4). The cartridge 110 is obliquely disposed, so that the valve seat 11 is smoothly inserted into the oil inlet 100 toward the inside of the housing 10, and the cartridge 110 is elastically deformed toward the axial line of the oil inlet 100.

When the check valve 1 is clamped in the oil inlet 100, the valve seat 11 is firstly plugged into the oil inlet 100 towards the direction of the inside of the shell 10; until the chuck 110 reaches the oil inlet clamping groove 101, the chuck 110 recovers the original shape and is clamped in the oil inlet clamping groove 101 under the action of the elasticity of the chuck 110.

The outer circumferential surface of the valve seat 11 is provided with a groove 112 (see fig. 4) extending along the circumferential direction of the valve seat 11, a sealing ring 1120 is disposed in the groove 112, and the sealing ring 1120 is clamped between the wall of the oil inlet 100 and the bottom wall of the groove 112 to seal a gap between the valve seat 11 and the wall of the oil inlet 100.

The valve seat 11 has a clamping hole 113 (see fig. 3) at the center, the diaphragm 12 has an insertion shaft 121 (see fig. 5) at the side away from the inside of the housing 10, and the insertion shaft 121 penetrates through and is clamped in the clamping hole 113, so that the valve seat 11 and the diaphragm 12 are very convenient to assemble.

The insertion shaft 121 is provided with a guide section 1211 and a mounting section 1212 which are coaxial, wherein the guide section 1211 is connected to the diaphragm 12 through the mounting section 1212, and is clamped in the clamping hole 113 through the mounting section 1212; the connecting portion of the guiding section 1211 and the mounting section 1212 is provided with a transition inclined surface 1213, and the diameter of the guiding section 1211 is smaller than that of the mounting section 1212, so that the mounting section 1212 is smoothly clamped in the clamping hole 113. The outer peripheral surface of the mounting section 1212 is provided with an insert shaft clamping groove 1210 extending along the circumferential direction of the insert shaft 121, and the hole wall of the clamping hole 113 is clamped in the insert shaft clamping groove 1210, so that the diaphragm 12 is covered on the valve seat 11.

In the present embodiment, the insert shaft 121 and the diaphragm 12 are made of elastic materials and are integrally formed; the insert shaft 121 has a blind hole 120 therein, and the blind hole 120 is coaxial with the insert shaft 121 and opens on a side of the diaphragm 12 facing the inside of the housing 10. In the process of assembling the valve seat 11 and the diaphragm 12, the transition inclined surface 1213 needs to be inserted into the clamping hole 113 to clamp the clamping hole 113 and the mounting section 1212; the blind hole 120 is provided to facilitate the elastic contraction of the transition inclined surface 1213 and the mounting section 1212 toward the axial center of the insertion shaft 121.

When assembling the valve seat 11 and the diaphragm 12, the guide 1211 is first inserted through the locking hole 113; then the transition inclined surface 1213 slides along the axis of the insert shaft 121 and the hole wall of the clamping hole 113 until the transition inclined surface 1213 passes through the clamping hole 113; meanwhile, the mounting section 1212 elastically contracts toward the axis of the blind hole 120 until the hole wall of the locking hole 113 is locked in the shaft-inserting locking groove 1210.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A check valve for a filter, characterized in that a check valve (1) is configured to be provided in an oil inlet (100) of a filter to prevent oil introduced into the filter through the oil inlet (100) from flowing back from the oil inlet (100);

check valve (1) includes disk seat (11) and diaphragm (12), still be equipped with on disk seat (11) and cross oilhole (111), diaphragm (12) lid is located disk seat (11) are towards the inside one side of filter, and the warp the fluid of crossing oilhole (111) can be lifted diaphragm (12) are in order to get into the filter.

2. The check valve according to claim 1, characterized in that the valve seat (11) is provided with a clamp head (110) arranged along the circumferential direction of the valve seat (11), and the clamp head (110) is used for being clamped in an oil inlet clamping groove (101) on the wall of the oil inlet (100).

3. The check valve according to claim 2, characterized in that a groove (112) extending along the circumferential direction of the valve seat (11) is formed on the outer circumferential surface of the valve seat (11), a sealing ring (1120) is disposed in the groove (112), and the sealing ring (1120) is used for being clamped between the wall of the oil inlet hole (100) and the bottom wall of the groove (112).

4. Non-return valve according to claim 2, characterized in that the membrane (12) is made of an elastic material.

5. The non-return valve according to claim 4, characterized in that the valve seat (11) has a central portion with a fastening hole (113), and the diaphragm (12) has a side facing away from the filter interior with an insertion shaft (121), and the insertion shaft (121) is inserted and fastened in the fastening hole (113).

6. A non-return valve according to claim 5, characterized in that the spindle (121) has a blind hole (120) therein, the blind hole (120) opening onto the side of the diaphragm (12) facing the interior of the filter.

7. The check valve according to claim 5, characterized in that the outer peripheral surface of the insert shaft (121) is provided with an insert shaft clamping groove (1210) extending along the circumferential direction of the insert shaft (121), and the hole wall of the clamping hole (113) is clamped in the insert shaft clamping groove (1210).

8. The check valve of claim 7, wherein the insertion shaft (121) has a guide section (1211) and a mounting section (1212), the guide section (1211) is connected to the diaphragm (12) through the mounting section (1212) and is clamped to the clamping hole (113) through the mounting section (1212), and a transition slope (1213) is formed at a connection position of the guide section (1211) and the mounting section (1212).

9. A filter, comprising a check valve according to any one of claims 2 to 8, wherein the oil inlet groove (101) extends in a circumferential direction of an oil inlet (100) of the filter, and the cartridge (110) is engaged in the oil inlet groove (101).

10. A filter according to claim 9, wherein the cartridge (110) is provided on a side of the valve seat (11) facing away from the filter interior, and the cartridge (110) is inclined from an end away from the bottom surface of the oil inlet port clamping groove (101) to an end close to the bottom surface of the oil inlet port clamping groove (101) in a direction away from the filter interior.