CN219062540U

CN219062540U - Check valve with pressure relief function

Info

Publication number: CN219062540U
Application number: CN202223279369.XU
Authority: CN
Inventors: 陈彬; 余伟伟; 张豹; 刘金星
Original assignee: Shanghai Changcheng Automatic Control Equipment Co ltd
Current assignee: Shanghai Changcheng Automatic Control Equipment Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-23
Anticipated expiration: 2032-12-07

Abstract

The utility model relates to the technical field of check valves, in particular to a check valve with a pressure relief function, which comprises a check valve, a check part and a pressure relief part; a check part for preventing the medium from flowing back in the valve body; two limiting rods are arranged on the movable blocks, and the limiting rods are inserted into the corresponding limiting holes and limit the fixed seat in the valve body; the pressure relief part is used for relieving pressure when the pressure in the valve body is too high; through the pressure release portion that sets up on the valve body: the valve is beneficial to timely discharging the pressure in the valve body and the pipeline, and the condition that the pipeline bursts due to overlarge pressure is avoided; through the check part that sets up: make the gag lever post break away from spacing hole through stirring movable block, can remove the restriction to the fixing base, can dismantle the check portion from the inside of valve body to be convenient for take out valve plate and sealing portion, the convenience is dismantled and is changed ageing sealing portion, and this design makes the dismantlement and the change of check valve sealing portion more convenient.

Description

Check valve with pressure relief function

Technical Field

The utility model relates to the technical field of check valves, in particular to a check valve with a pressure relief function.

Background

The check valve is a valve with a circular valve clack as an opening and closing part and can stop the medium from flowing backwards by the action of the self weight and the medium pressure; the check valve mainly comprises a valve plate, a valve clack, a valve body, a spring and the like, is arranged at a pipeline and the like in many cases and is used for preventing a medium (such as a water body and the like) conveyed in the pipeline from flowing backwards;

the utility model patent with the authority of publication number CN210770447U discloses a check valve, which comprises a valve body, a triangular bracket and a valve rod penetrating through the triangular bracket and extending into the valve body, wherein one end of the valve body is an inlet, the other end of the valve body is an outlet and is connected with the triangular bracket, the triangular bracket is provided with a parallel section connected with the valve body and a vertical section extending into the valve body, the vertical section is positioned in the middle of the parallel section, a spring is sleeved outside the vertical section, a moving cavity for the valve rod to move up and down is arranged in the middle of the triangular bracket, the valve rod is a reducing rod, the top of the valve rod is provided with a valve clack, the valve clack and the valve rod are of an integrated structure, one end of the spring is connected to the back of the valve clack, the other end of the spring is connected to the parallel section of the triangular bracket, and a damping hole is formed in the parallel section of the triangular bracket, which is close to the moving cavity; the damping hole is arranged to control the opening and closing speed of the valve clack, so that the damping function is achieved, and the check effect of the check valve is prevented from being influenced due to vibration of the valve clack during opening and closing;

although this check valve can play buffering shock-absorbing function through the damping hole that sets up, in the use of check valve, there is the following problem: in order to ensure the tightness between the valve clack and the valve hole, a plurality of valve clacks are provided with rubber sealing elements, but with the increase of the service time, the rubber sealing elements can be aged and deformed, so that the sealing of the valve clacks and the valve hole is not tight, and therefore, in order to ensure the tightness of the valve clacks, the aged rubber sealing elements are required to be replaced, and the valve clacks of the prior check valves have the problem of inconvenient disassembly and assembly, so that the replacement difficulty of the rubber sealing elements is increased, and in view of the problem, the check valve with the pressure relief function is proposed.

Disclosure of Invention

The present utility model is directed to a check valve with a pressure relief function, so as to solve the problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the check valve with the pressure relief function comprises a check valve, a check part and a pressure relief part;

the check valve comprises a valve body, wherein two limiting holes are formed in the positions, located on the upper side and the lower side, of the inner wall of the valve body; a baffle is arranged in the valve body, and a through hole for medium circulation is formed in the baffle;

the check part is used for preventing the medium from flowing backwards in the valve body and is detachably arranged on the front side of the valve body;

the pressure relief part is used for relieving pressure when the pressure in the valve body is too high and is arranged on the outer wall of the valve body; the valve comprises a shell fixedly connected with the outer wall of a valve body, a pressure relief hole is formed in the shell, the shell is communicated with the inside of the valve body through a valve hole, a sealing block for blocking the valve hole is arranged at the valve hole of the shell, a guide rod is arranged on the sealing block, the tail end of the guide rod penetrates through the shell and is arranged on a limiting block, and a third spring for propping against the sealing block to enable the sealing block to block the valve hole is further sleeved on the guide rod.

As the preferable technical scheme of the utility model, the check part comprises a detachable fixing seat which is positioned in the valve body, a connecting block is arranged at the center in an opening of the fixing seat, a valve rod is slidably arranged on the connecting block, a valve plate is arranged at the rear end of the valve rod, a sealing part is arranged on the valve plate, and a first spring for propping against the sealing part is sleeved on the valve rod.

As the preferable technical scheme of the utility model, the upper side and the lower side of the connecting block are respectively provided with a fixed plate fixedly connected with the fixed seat, the center of the fixed plate is slidably provided with a connecting rod, the top end of the connecting rod is provided with a movable block, the connecting rod is also sleeved with a second spring for propping against the movable block, the movable block is provided with two limiting rods, and the limiting rods are inserted into corresponding limiting holes and limit the fixed seat in the valve body.

As the preferable technical scheme of the utility model, the front end of the valve rod is provided with the limiting ring, and the limiting ring is fixedly connected with the valve rod through bolts.

As the preferable technical scheme of the utility model, the positioning strips are arranged on the upper side and the lower side of the inner wall of the valve body, the positioning columns are arranged on the rear side of the valve body between the two positioning strips, and the positioning strips and the positioning columns respectively abut against the two side walls and the rear side wall of the fastening seat.

As the preferable technical scheme of the utility model, the top end and the bottom end of the fixing seat are arc-shaped, and the top end and the bottom end of the fixing seat can slide along the inner wall of the valve body.

As the preferable technical scheme of the utility model, the sealing part is a rubber finished product, the size of the sealing part is matched with the size of the through hole, and the valve plate is fixedly connected with the sealing part through a bolt.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the pressure release portion that sets up on the valve body: when the backflow medium in the pipeline is converged at the valve plate, the pressure in the valve body and the pipeline is increased sharply, under the action of high pressure, the medium jacks up the sealing block upwards, and the medium can be discharged to the outside through the pressure relief hole, so that the pressure in the valve body and the pipeline can be discharged in time, the condition that the pipeline bursts due to overlarge pressure is avoided, and the valve body and the pipeline are protected;

2. through the check part that sets up: make the gag lever post break away from spacing hole through stirring movable block, can remove the restriction to the fixing base, can dismantle the check portion from the inside of valve body to be convenient for take out valve plate and sealing portion, the convenience is dismantled and is changed ageing sealing portion, and this design makes the dismantlement and the change of check valve sealing portion more convenient.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of the overall structure of the present utility model;

FIG. 3 is a cross-sectional view of the valve body of the present utility model;

FIG. 4 is an enlarged schematic view of the structure of FIG. 3A according to the present utility model;

FIG. 5 is a schematic view of the structure of the check part in the present utility model;

fig. 6 is a partial structural cross-sectional view of the check part in the present utility model.

In the figure:

1. a check valve; 11. a valve body; 111. a limiting hole; 112. positioning columns; 113. a positioning strip; 12. a baffle; 121. a through hole;

2. a non-return portion; 21. a fixing seat; 22. a connecting block; 23. a valve stem; 231. a limiting ring; 24. a first spring; 25. a valve plate; 251. a sealing part; 26. a fixing plate; 27. a connecting rod; 28. a movable block; 281. a limit rod; 29. a second spring;

3. a pressure relief portion; 31. a housing; 311. a pressure relief hole; 32. a guide rod; 33. a sealing block; 34. a limiting block; 35. and a third spring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The embodiment provides a technical scheme:

referring to fig. 1, 4, 5 and 6, the check valve with pressure relief function comprises a check valve 1, a check part 2 and a pressure relief part 3, wherein the check valve 1 comprises a valve body 11, and two limiting holes 111 are formed in the inner wall of the valve body 11 at the upper side and the lower side; the inside of the valve body 11 is provided with a baffle 12, the valve body 11 and the baffle 12 are of an integrated structure, and the baffle 12 is provided with a through hole 121 for medium circulation; the check part 2 comprises a detachable fixed seat 21 positioned in the valve body 11, a connecting block 22 is arranged at the center of the opening of the fixed seat 21, the connecting block 22 is fixedly connected with the fixed seat 21 through a bolt, a valve rod 23 is slidably arranged on the connecting block 22, a valve plate 25 is arranged at the rear end of the valve rod 23, the valve plate 25 is fixedly connected with the valve rod 23 through a bolt, a sealing part 251 is arranged on the valve plate 25, and the valve rod 23 is further sleeved with a first spring 24 for propping against the sealing part 251; the upper and lower sides of the connecting block 22 are respectively provided with a fixed plate 26 fixedly connected with the fixed seat 21, the fixed plate 26 is tightly welded with the fixed seat 21, the center of the fixed plate 26 is slidably provided with a connecting rod 27, the top end of the connecting rod 27 is provided with a movable block 28, the connecting rod 27 is also sleeved with a second spring 29 for propping against the movable block 28, the movable block 28 is respectively provided with two limiting rods 281, the movable block 28 is tightly welded with the limiting rods 281 and the connecting rod 27, and the limiting rods 281 are inserted into corresponding limiting holes 111 and limit the fixed seat 21 in the valve body 11;

in this embodiment, the front end of the valve rod 23 is provided with the limit ring 231, and the limit ring 231 is fixedly connected with the valve rod 23 through bolts, and the setting of the limit ring 231 plays a limiting role on the horizontal movement of the valve rod 23, so as to prevent the valve rod 23 from separating from the connecting block 22.

In this embodiment, the positioning strips 113 are installed on the upper and lower sides of the inner wall of the valve body 11, the positioning columns 112 are installed on the rear side of the valve body between the two positioning strips 113, the positioning strips 113 and the positioning columns 112 respectively abut against the two side walls and the rear side wall of the fixing seat 21, the positioning strips 113 and the positioning columns 112 play a role in limiting and positioning the installation of the fixing seat 21, the limiting rod 281 is convenient to align with the limiting hole 111 for insertion, and the fixing seat 21 is convenient to fix.

In this embodiment, the top and bottom ends of the fixing seat 21 are arc-shaped, and the top and bottom ends of the fixing seat 21 can slide along the inner wall of the valve body 11, so that the design can improve the stability of the fixing seat 21 after being mounted to the valve body 11, and avoid the condition that the fixing seat 21 shakes.

In this embodiment, the sealing portion 251 is made of rubber, the size of the sealing portion 251 is adapted to the size of the through hole 121, the valve plate 25 is fixedly connected with the sealing portion 251 through bolts, the through hole 121 is conveniently blocked when the medium flows back through the sealing portion 251 to prevent the medium from flowing back, and the aged sealing portion 251 is conveniently detached and replaced in a bolt fixing manner.

Referring to fig. 2-3, a pressure relief portion 3 for relieving pressure when the pressure in the valve body 11 is too high is disposed on the outer wall of the valve body 11; the valve comprises a shell 31 fixedly connected with the outer wall of a valve body 11, the shell 31 is fixedly connected with the valve body 11 through rivets, a pressure relief hole 311 is formed in the shell 31, the shell 31 is communicated with the inside of the valve body 11 through a valve hole, a sealing block 33 for blocking the valve hole is arranged at the valve hole of the shell 31, a guide rod 32 is arranged on the sealing block 33, the room sealing block 33 is fixedly connected with the guide rod 32 through rivets, the tail end of the guide rod 32 penetrates through the shell 31 and is arranged on a limiting block 34, and a third spring 35 for propping against the sealing block 33 to enable the sealing block 33 to block the valve hole is sleeved on the guide rod 32;

it should be added that the sealing block 33 is made of rubber, and the size of the sealing block 33 is matched with the size of the valve hole, when the pressure in the valve body 11 is large, under the action of high pressure, the pressure is greater than the elastic force of the third spring 35, so that the sealing block 33 can be lifted upwards to separate from the valve hole, and the medium can enter the shell 31 at the same time and be discharged to the outside through the pressure release hole 311, thereby achieving the purpose of pressure release.

When the check part 2 needs to be disassembled, a user firstly dials the movable block 28 from the upper side and the lower side to the connecting block 22, the movable block 28 drives the connecting rod 27 to slide along the fixed plate 26, at the moment, the second spring 29 is compressed by the movable block 28, meanwhile, the movable block 28 drives the limiting rod 281 to be separated from the limiting hole 111, at the moment, the limitation of the fixed seat 21 is released, then the user pushes the fixed seat 21 to the front side, the fixed seat 21 slides along the positioning strips 113 at the two sides, meanwhile, the fixed seat 21 is separated from the valve body 11, then the user dismantles the sealing part 251 from the valve plate 25 and replaces the sealing part 251, finally, the user inserts the fixed seat 21 aiming at the gap between the two positioning strips 113, dials the movable block 28 from the upper side and the lower side to the connecting block 22, the movable block 28 drives the limiting rod 281 to move, the fixed seat 21 is immersed into the valve body 11, the fixed seat 21 is continuously pushed, when the fixed seat 21 abuts against the positioning column 112, and the user stops the movable block 28, and the limiting rod 281 is inserted into the limiting hole 111 under the elasticity of the second spring 29, and the installation is completed;

when the pressure in the valve body 11 is high due to the backflow of the medium in the pipeline, the medium pushes up the sealing block 33 upwards, the sealing block 33 is separated from the valve hole, at the moment, the medium enters the shell 31 and is discharged to the outside through the pressure relief hole 311, and the pressure in the valve body 11 is reduced.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The check valve with the pressure relief function comprises a check valve (1), a check part (2) and a pressure relief part (3), and is characterized in that:

the check valve (1) comprises a valve body (11), wherein two limiting holes (111) are formed in the positions, located on the upper side and the lower side, of the inner wall of the valve body (11); a baffle plate (12) is arranged in the valve body (11), and the baffle plate (12) is provided with a through hole (121) for medium circulation;

a check part (2) for preventing the medium from flowing back in the valve body (11), and detachably arranged at the front side of the valve body (11);

the pressure relief part (3) is used for relieving pressure when the pressure in the valve body (11) is too high and is arranged on the outer wall of the valve body (11); including casing (31) with valve body (11) outer wall fixed connection, pressure release hole (311) have been seted up on casing (31), and casing (31) are linked together through valve opening and valve body (11) inside, sealing block (33) that are used for blockking up the valve opening are installed to valve opening department of casing (31), install guide arm (32) on sealing block (33), the end of guide arm (32) passes casing (31) and installs in stopper (34), still the cover is equipped with on guide arm (32) and is used for supporting tight sealing block (33) so that sealing block (33) blocks up third spring (35) of valve opening.

2. The check valve with pressure relief function according to claim 1, wherein: the check portion (2) comprises a fixed seat (21) which is arranged in the valve body (11) and is detachable, a connecting block (22) is arranged at the center in an opening of the fixed seat (21), a valve rod (23) is slidably arranged on the connecting block (22), a valve plate (25) is arranged at the rear end of the valve rod (23), a sealing portion (251) is arranged on the valve plate (25), and a first spring (24) for propping against the sealing portion (251) is sleeved on the valve rod (23).

3. The check valve with pressure relief function according to claim 2, wherein: fixed plate (26) with fixing base (21) fixed connection are all installed to upper and lower both sides department of connecting block (22), and the central department slidable mounting of fixed plate (26) has connecting rod (27), and movable block (28) are installed on the top of connecting rod (27), still overlap on connecting rod (27) and are equipped with second spring (29) that are used for supporting tight movable block (28), all install two gag lever posts (281) on movable block (28), and gag lever post (281) insert in corresponding spacing hole (111) and restrict fixing base (21) in valve body (11).

4. The check valve with pressure relief function according to claim 3, wherein: and a limiting ring (231) is arranged at the front end of the valve rod (23), and the limiting ring (231) is fixedly connected with the valve rod (23) through bolts.

5. The check valve with pressure relief function according to claim 1, wherein: the inner wall of valve body (11) is located upper and lower both sides department and all installs locating strip (113), and locating column (112) are all installed to the department that is located the rear side between two locating strips (113), and locating strip (113) and locating column (112) support the both sides wall and the rear side wall of fastening fixed seat (21) respectively.

6. The check valve with pressure relief function according to claim 3, wherein: the top and the bottom of fixing base (21) are arc, and fixing base (21) top and bottom can follow the inner wall of valve body (11) to slide.

7. The check valve with pressure relief function according to claim 3, wherein: the sealing part (251) is a finished product made of rubber, the size of the sealing part (251) is matched with the size of the through hole (121), and the valve plate (25) is fixedly connected with the sealing part (251) through bolts.