CN212360903U

CN212360903U - Check valve

Info

Publication number: CN212360903U
Application number: CN202020513647.5U
Authority: CN
Inventors: 宣永斌; 金华海; 赵剑波
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2021-01-15
Anticipated expiration: 2030-04-09

Abstract

The utility model relates to the technical field of valves, especially, relate to a check valve. A check valve comprises a valve body and a valve core, wherein the valve core is arranged in the valve body, and the valve core and the inner wall of the valve body are arranged at intervals to form a flow passage; the valve core can move along the axial direction of the valve body to open/close the check valve; the valve comprises a valve body and is characterized in that a plane is arranged on the inner side wall of the valve body, a convex part is arranged on the outer side wall of the valve core, the distance from the circle center of the valve core to the plane is L1, the distance from the circle center of the valve core to one side surface of the convex part, which is far away from the valve core, is L2, and L2 is greater than L1. The utility model discloses a have a bit in: by means of the L2 > L1, when the valve core rotates, the outer side face of the convex portion abuts against the plane, even if the valve core and the valve body rotate to interfere, rotation of the valve core is limited, and the valve core is simple in structure, convenient to machine and low in cost.

Description

Check valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a check valve.

Background

Check valves are one of the common components in each line. The check valve has the functions of: the fluid forms a flow path in an open state by a forward flow of the fluid, and closes the flow path in a closed state by a reverse flow of the fluid.

In view of the environmental factor, energy saving, and noise reduction, there are various demands, and a "micro differential pressure operation type" check valve that closes a valve by its own weight without using a spring for biasing a valve body has been on the market. However, when the check valve is provided after the compressor or when the check valve is curved, a spiral rotation component is present in the fluid flowing through the check valve, and the vertically provided check valve closes by its own weight, so that a valve closing urging mechanism such as a spring is not provided. Therefore, when the valve is closed by its own weight, the valve body may rotate inside the valve body (valve chamber) when the valve is opened, which may cause abnormal noise, deformation, and wear, and shorten the life of the check valve.

In order to solve the above problems, conventionally, a component for preventing the rotation of the valve core is provided between the valve body and the valve core, and for example, the technical solutions disclosed in patent documents such as patent publication nos. CN103383012B and CN107023700A are all that the rotation stopping protrusion is provided on the inner side wall of the valve body separately, and the valve core is also provided with a matching structure. Above-mentioned this kind of scheme, spare part is more, and the structure is comparatively complicated and the cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a check valve with a simple structure and low cost.

A check valve comprises a valve body and a valve core, wherein the valve core is arranged in the valve body, and the valve core and the inner wall of the valve body are arranged at intervals to form a flow passage; the valve core can move along the axial direction of the valve body to open/close the check valve;

the valve comprises a valve body and is characterized in that a plane is arranged on the inner side wall of the valve body, a convex part is arranged on the outer side wall of the valve core, the distance from the circle center of the valve core to the plane is L1, the distance from the circle center of the valve core to one side surface of the convex part, which is far away from the valve core, is L2, and L2 is greater than L1.

In the application, by making L2 > L1, when the valve core rotates, the outer side surface of the convex part can abut against the plane, even if the valve core and the valve body rotate to generate interference, the rotation of the valve core is limited, and the valve core is simple in structure, convenient to machine and low in cost.

In one embodiment, the number of the planes is 1, the number of the convex parts is at least 2, and the planes are located between 2 convex parts.

In one embodiment, the plane is provided with a plurality of planes, and the planes are distributed along the circumferential direction of the valve body at intervals; the number of the convex parts is equal to the number of the flat surfaces.

So set up, can restrict the rotation of case simultaneously in the many places of case circumference, improve stability.

In one embodiment, the number of the planes is 3, and the 3 planes are uniformly distributed along the circumferential direction of the valve body at intervals.

In one embodiment, the outer side wall portion of the valve body is recessed inwardly so that the inner side wall of the valve body forms the flat surface.

In one embodiment, the plane is formed by stamping.

It can be understood that the plane is punched by a punching mode, so that the processing is convenient, the process is simple and the cost is low.

In one embodiment, the protrusion is integrally formed with the valve element.

By the arrangement, the integral machining of the valve core can be facilitated, and the working procedures are saved.

In one embodiment, the check valve further includes a sealing element fixed in the valve body, the sealing element has a valve port along an axial direction of the valve body, the valve core has a fitting portion, and the fitting portion is fitted with the valve port to open/close the valve port.

In one embodiment, a mounting structure is arranged between the sealing element and the valve body, and the sealing element is mounted in the valve body through the mounting structure.

In one embodiment, the mounting structure comprises a mounting part arranged on the inner side wall of the valve body, the outer side wall of the sealing element is provided with a mounting groove, and the mounting part can extend into the mounting groove;

or, mounting structure is including locating installation department on the sealing member lateral wall, the mounting groove has been seted up on the inside wall of valve body, the installation department can stretch into in the mounting groove.

In one embodiment, the protrusion on the valve body is formed by stamping.

Compared with the prior art, the check valve provided by the application has the advantages that the L2 is larger than the L1, so that when the valve core rotates, the outer side surface of the convex part can abut against the plane, even if the valve core interferes with the rotation between the valve bodies, the rotation of the valve core is limited, and the check valve is simple in structure, convenient to process and low in cost.

Drawings

Fig. 1 is a schematic view of a cross-sectional structure of the check valve provided by the present invention.

Fig. 2 is a schematic cross-sectional view of the check valve at a-a in fig. 1.

Fig. 3 is a schematic structural diagram of another embodiment of the check valve provided by the present invention.

Fig. 4 is a partial enlarged view of the position B in fig. 1 according to the present invention.

Description of the main elements:

100. a check valve; 10. a valve body; 11. a valve cavity; 12. an inlet; 13. an outlet; 14. a plane; 20. a valve core; 21. a flow channel; 22. a convex portion; 23. a fitting portion; 30. a seal member; 31. a valve port; 32. mounting grooves; 40. a mounting structure; 41. an installation part.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

In the description of the present invention, the orientation or positional relationship indicated by the related directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" and the like are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these directional terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

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 in the description of the invention herein 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, the present invention provides a check valve 100, which is applied to a pipeline for one-way controlling the flow of fluid in the pipeline 100. In particular, the check valve 100 is applied to an air conditioning system to control one-way circulation of refrigerant.

Referring to fig. 2, the check valve 100 of the present invention includes a valve body 10 and a valve core 20, wherein the valve core 20 is installed in the valve body 10, and the valve core 20 and an inner wall of the valve body 10 are spaced apart from each other to form a flow passage 21; the spool 20 is movable in the axial direction of the valve body 10 to open/close the check valve.

Specifically, when the fluid pressure is greater than the gravity of the valve spool 20, the valve spool 20 moves along the axis of the valve body 10 by the fluid pressure, opening the check valve 100; the check valve 100 is closed when the valve spool 20 is reset when the fluid pressure is less than the weight of the valve spool 20.

Further, the valve body 10 is substantially cylindrical, the valve cavity 11 is formed inside the valve body 10, the inlet 12 and the outlet 13 are respectively formed at both ends of the valve body 10, and the valve core 20 is installed in the valve cavity 11 and can move in the valve cavity 11 under the action of fluid pressure, so that the inlet 12 and the outlet 13 are communicated through the flow passage 21 or the communication among the flow passage 21, the inlet 12 and the outlet 13 is blocked, that is, the opening/closing of the check valve 100 is realized.

As shown in fig. 1, in order to prevent the valve core 20 from being rotated by the fluid vortex relative to the valve body 10, i.e. the valve core 20 rotates in the valve cavity 11 to generate noise, preferably, the present invention provides a corresponding structure to prevent the valve core 20 from being rotated by the fluid vortex.

Specifically, the inner side wall of the valve body 10 has a plane 14, the outer side wall of the valve core 20 is provided with a convex portion 22, the distance from the center of the valve core 20 to the plane 14 is L1, the distance from the center of the valve core 20 to one side surface of the convex portion 22 away from the valve core 20 is L2, and L2 > L1.

It can be understood that, by making L2 > L1, when the valve core 20, the outer side surface of the convex portion 22 will abut against the plane 14, that is, the rotation between the valve core 20 and the valve body 10 will interfere to limit the whole rotation of the valve core 20, which is not only simple in structure, convenient in processing and low in cost.

In one embodiment, as shown in fig. 2, the number of flat surfaces 14 is 1, the number of protrusions 22 is at least 2, and the flat surfaces 14 are located between the 2 protrusions 22. It can be understood that, by providing at least 2 protrusions 22, no matter the valve core 20 is subjected to a clockwise or counterclockwise circumferential force, the valve core 20 can be in contact with the flat surface 14 at a minimum stroke, so as to prevent the valve core 20 from rotating and reduce noise generated by collision between the valve core 20 and the valve body 10.

In another embodiment, as shown in fig. 3, the number of the flat surfaces 14 is plural, and the number of the convex portions 22 is equal to the number of the flat surfaces 14 and is arranged in one-to-one correspondence. It can be understood that the plurality of planes 14 are provided, so that the valve core 20 can be limited to rotate at a plurality of circumferential positions of the valve core 20, and the overall stability is improved; at the same time, the valve core 20 can be contacted with the plane 14 under the minimum stroke, and the noise is reduced.

Specifically, the number of the planes 14 is 3, and the 3 planes 14 are uniformly arranged on the outer side wall of the valve core 20 at intervals along the circumferential direction of the valve core 20; similarly, the number of the convex portions 22 is also 3, and 3 convex portions 22 are matched with 3 flat surfaces 14 one by one, and one convex portion 22 is arranged between two adjacent flat surfaces. Of course, in other embodiments, the number of the planes 14 may also be 2, 4, and the specific number may be set according to practical situations, and will not be further described herein.

As shown in fig. 1, a portion of the outer sidewall of the valve body 10 is recessed inward so that the inner sidewall of the valve body 10 forms the above-mentioned flat surface 14.

Preferably, the plane 14 is formed by stamping. Thus, the plane 14 is stamped by a stamping method, so that the processing is convenient, the process is simple and the cost is low.

As shown in fig. 2, the valve element 20 is a copper valve element 20, that is, the valve element 20 is formed by machining a copper material. Preferably, the valve core 20 is formed by machining a copper tube. The convex portion 22 and the valve core 20 are provided as an integrated structure, so that in the process of manufacturing the valve core 20, the working procedure is saved, and the processing cost is reduced. Of course, in other embodiments, the material of the valve element 20 is not limited to copper material, but may also be ceramic, steel, etc., which may be set according to the environment of practical application and design requirements.

As shown in fig. 1, the check valve 100 further includes a sealing member 30, the sealing member 30 is fixed in the valve body 10, a valve port 31 is formed on the sealing member 30 along an axial direction of the valve body 10, a fitting portion 23 is formed on the valve element 20, and the fitting portion 23 is fitted with the valve port 31 to open/close the valve port 31, thereby realizing the opening/closing of the check valve 100.

Specifically, the sealing member 30 is fixed in the valve chamber 11 and is connected between the inner walls of the valve chamber 11 in a sealing manner, so as to prevent the fluid in the pipe from leaking from the gap between the sealing member 30 and the inner walls of the valve chamber 11.

Further, as shown in fig. 1 and 4, in order to fix the sealing member 30, a mounting structure 40 is provided between the sealing member 30 and the valve body 10, and the sealing member 30 is mounted in the valve body 10 by the mounting structure 40.

Specifically, the mounting structure 40 includes a mounting portion 41 disposed on an inner side wall of the valve body 10, a mounting groove 32 is formed on an outer side wall of the sealing element 30, and the mounting portion 41 can extend into the mounting groove 32, so as to fix the sealing element 30; of course, in other embodiments, the positions of the mounting portion 41 and the mounting groove 32 may be interchanged, that is, the mounting portion 41 is disposed on the outer side wall of the sealing member 30, the mounting groove 32 is correspondingly opened on the inner side wall of the valve body 10, the mounting portion 41 can extend into the mounting groove 32, and the sealing member 30 can be fixed.

Preferably, the projection on the valve body 10 is formed by stamping, i.e. the process of fixing the seal 30, which may also be referred to as riveting.

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

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be taken as limiting the present invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.

Claims

1. A check valve comprises a valve body (10) and a valve core (20), wherein the valve core (20) is installed in the valve body (10), and the valve core (20) and the inner wall of the valve body (10) are arranged at intervals to form a flow passage (21); the valve core (20) can move along the axial direction of the valve body (10) to open/close the check valve;

the novel valve is characterized in that a plane (14) is arranged on the inner side wall of the valve body (10), a convex part (22) is arranged on the outer side wall of the valve core (20), the distance from the circle center of the valve core (20) to the plane (14) is L1, the distance from the circle center of the valve core (20) to one side face, far away from the valve core (20), of the convex part (22) is L2, and L2 is more than L1.

2. The non-return valve according to claim 1, characterized in that the number of said flat faces (14) is 1, the number of said protrusions (22) is at least 2, and said flat faces (14) are located between 2 of said protrusions (22).

3. The check valve according to claim 1, characterized in that the plane (14) has a plurality, and the plurality of planes (14) are distributed at intervals along the circumference of the valve body (10); the number of projections (22) is equal to the number of flats (14).

4. The non-return valve according to claim 3, characterized in that the number of said planes (14) is 3, and that 3 of said planes (14) are evenly spaced along the circumference of the valve body (10).

5. The check valve of claim 1, wherein an outer side wall portion of the valve body (10) is recessed inwardly such that an inner side wall of the valve body (10) forms the flat surface (14).

6. The non-return valve according to claim 5, characterized in that the plane (14) is formed by stamping.

7. The check valve of claim 1, wherein the protrusion (22) is provided as one piece with the spool (20).

8. The check valve according to claim 1, further comprising a sealing member (30), wherein the sealing member (30) is fixed in the valve body (10), a valve port (31) is formed on the sealing member (30) along an axial direction of the valve body (10), and the valve body (20) has a fitting portion (23), wherein the fitting portion (23) is fitted with the valve port (31) to open/close the valve port (31).

9. The check valve of claim 8, wherein a mounting structure (40) is provided between the seal (30) and the valve body (10), and the seal (30) is mounted within the valve body (10) by the mounting structure (40).

10. The check valve of claim 9, wherein the mounting structure (40) comprises a mounting portion (41) disposed on an inner side wall of the valve body (10), an installation groove (32) is formed on an outer side wall of the sealing member (30), and the mounting portion (41) can extend into the installation groove (32);

or, mounting structure (40) are including locating installation department (41) on sealing member (30) lateral wall, mounting groove (32) have been seted up on the inside wall of valve body (10), installation department (41) can stretch into in mounting groove (32).