CN207316152U - a one-way valve - Google Patents

Abstract

The utility model relates to a one-way valve, which comprises a valve body (1), a return spring (2), a plug (4), a positioning sleeve (5) and a cover (6). The valve body (1) is connected by threads, and there is a sealant on the threaded connection, which further ensures the tightness of the entire check valve; the plug (4) is connected with the second O-ring (7) Form a sealing surface so that the air pressure of the output port (9) is sealed and does not flow back.

Description

a one-way valve

technical field

The utility model relates to the technical field of valve devices, in particular to a one-way valve.

Background technique

The one-way valve in the prior art has a large volume and has the problem of poor sealing performance.

For example, the Chinese invention patent whose publication number is CN 104676053 A discloses a check valve, which includes a valve body and a valve core installed in the valve body. The bottom surface of the valve core is provided with a support spring. A first elastic member is arranged on the wall; a baffle is arranged on the inner wall of the valve on the side opposite to the inlet of the first elastic member. The upward pulling force of the spool is increased, which solves the problem of poor sealing of the one-way valve during the locking process. However, there is no sealing structure between the valve body and the valve core, and the sealing performance is poor.

Utility model content

In order to solve the above-mentioned technical defects existing in the prior art, the purpose of this utility model is to provide a one-way valve, which solves the risk of failure due to the leakage of the tee joint in the prior art due to the large number of connecting pipelines The problem.

In order to realize above-mentioned design object, the scheme that the utility model adopts is as follows:

The one-way valve of the utility model includes a valve body, a return spring, a plug, a positioning sleeve and a cover. The cover and the valve body are connected by threads, which is convenient for maintenance and repair, and sealant is applied on the threaded joints. It further ensures the tightness of the entire one-way valve; the plug gate forms a sealing surface with the second O-ring through the action of the return spring, so that the air pressure at the output port is sealed and does not flow back.

Preferably, the second O-ring is located between the cover and the positioning sleeve.

In any of the solutions above, preferably, the positioning sleeve is engaged in the stepped groove of the valve body.

In any of the above schemes, preferably, the inner wall of the positioning sleeve is tapered; the end axial surface of the plug door is tapered. When the air pressure of the air inlet drops during the working process, the plug door moves to the left by the force of the return spring and the air pressure of the output end, and the tapered end surface of the plug door contacts the second O-ring, so that the second O-ring The O-ring is compressed to form a sealing surface, which is sealed against the air pressure of the output port and does not flow back. The sealing surface of the one-way valve of the utility model is formed by the compression of the valve port and the O-ring, and the cost is greatly reduced compared with the general sealing by rubber vulcanization components.

In any of the above schemes, it is preferable that the cover is provided with an air inlet; the end of the valve body is provided with an outlet.

In any of the above solutions, it is preferred that a groove is formed at the end of the valve body, and a first O-ring is arranged in the groove.

In any of the above schemes, preferably, the opening pressure of the cock is 15-35kPa.

In any of the above schemes, preferably, a through hole is opened in the middle of the plug.

In any of the above solutions, it is preferable that the threaded connection between the cover and the valve body is provided with a sealant to further ensure the tightness of the entire one-way valve.

To sum up, the check valve of the utility model has the following advantages: the cover and the valve body are connected by thread, which is convenient for maintenance and repair, and there is sealant on the thread connection, which further ensures the sealing performance of the whole check valve; The door forms a sealing surface with the second O-ring through the action of the return spring, so that the air pressure at the output port is sealed and does not flow back.

Description of drawings

Fig. 1 is a schematic structural view of a preferred embodiment of the check valve according to the present invention.

Fig. 2 is a sectional view of the preferred embodiment shown in Fig. 1 of the check valve according to the present invention.

Detailed ways

The following description is merely exemplary in nature and not intended to limit the disclosure, application or use. The specific implementation of the check valve of the present utility model will be further described below in combination with the accompanying drawings.

As shown in Fig. 1 and Fig. 2, a schematic structural view of the check valve according to the present invention.

The one-way valve of the present utility model includes a valve body 1, a return spring 2, a plug 4, a positioning sleeve 5 and a cover 6. The cover 6 is connected to the valve body 1 through threads, which is convenient for maintenance and repair, and The joint is sealed with sealant, which further ensures the tightness of the entire check valve; the plug 4 forms a sealing surface with the second O-ring 7 through the action of the return spring 2, so that the air pressure of the output port 9 is sealed and does not flow back.

In this embodiment, the second O-ring 7 is located between the cover 6 and the positioning sleeve 5 .

In this embodiment, the positioning sleeve 5 is engaged in the stepped groove of the valve body 1 .

In this embodiment, the inner wall of the positioning sleeve 5 is tapered; the end axial surface of the plug 4 is tapered. During the working process, when the air pressure of the air inlet 8 drops, the plug door 4 moves to the left by the force of the return spring 2 and the air pressure of the output end, and the tapered end surface of the plug door 4 and the second O-ring 7 Contact, so that the second O-ring 7 is compressed to form a sealing surface, which is sealed against the air pressure of the output port 9 and does not flow back. The sealing surface of the one-way valve of the utility model is formed by the compression of the valve port and the O-ring, and the cost is greatly reduced compared with the general sealing by rubber vulcanization components.

In this embodiment, the cover 6 is provided with an air inlet 8 ; the end of the valve body 1 is provided with an outlet 9 .

In this embodiment, a groove is formed at the end of the valve body 1 , and a first O-ring 3 is arranged in the groove.

In this embodiment, the opening air pressure of the plug valve 4 is 15-35kPa.

In this embodiment, a through hole is opened in the middle part of the plug door 4 .

In this embodiment, the threaded connection between the cover 6 and the valve body 1 is provided with sealant to further ensure the tightness of the entire one-way valve.

In summary, the one-way valve of the present utility model has the following advantages: the cover 6 and the valve body 1 are connected by threads, which is convenient for maintenance and overhaul, and there is a sealant on the threaded connection, which further ensures the tightness of the entire one-way valve ; The plug door 4 forms a sealing surface with the second O-ring 7 through the action of the return spring 2, so that the air pressure at the output port 9 is sealed and does not flow back.

It is not difficult for those skilled in the art to understand that the one-way valve of the present invention includes any combination of parts in this specification. Due to space limitation and in order to make the specification concise, these combinations are not introduced in detail here, but after reading this specification, the scope of the utility model constituted by any combination of the parts of this specification is self-evident.

Claims (10)

1. a kind of check valve, including valve body（1）, return spring（2）, cock（4）, positioning sleeve（5）And capping（6）, its feature exists In：Capping（6）With valve body（1）It is connected through a screw thread；Cock（4）Pass through return spring（2）Effect and the second O-ring（7）Shape Into sealing surface.

2. check valve as claimed in claim 1, it is characterised in that：Second O-ring（7）Positioned at capping（6）With positioning sleeve（5）It Between.

3. check valve as claimed in claim 1 or 2, it is characterised in that：Positioning sleeve（5）It is fastened on valve body（1）Step groove in.

4. check valve as claimed in claim 1 or 2, it is characterised in that：Positioning sleeve（5）Inner wall it is tapered.

5. check valve as claimed in claim 1, it is characterised in that：Cock（4）End end axial plane it is tapered.

6. check valve as claimed in claim 1, it is characterised in that：Capping（6）On be provided with air inlet（8）；Valve body（1）End It is provided with delivery outlet（9）.

7. check valve as claimed in claim 1, it is characterised in that：Valve body（1）End be provided with groove, the is equipped with the groove One O-ring（3）.

8. the check valve as described in claim 1 or 5, it is characterised in that：Cock（4）Unlatching air pressure be 15-35kPa.

9. the check valve as described in claim 1 or 5, it is characterised in that：Cock（4）Middle part be provided with through hole.

10. check valve as claimed in claim 1, it is characterised in that：Capping（6）With valve body（1）Threaded connection place be equipped with it is close Sealing.