CN219911892U - Spring type safety valve - Google Patents

Abstract

The utility model discloses a spring type safety valve, which relates to the technical field of safety valves and comprises a valve body, wherein a double-head pipe is arranged on the valve body, and the spring type safety valve further comprises: the sealing structure comprises a pressing cover and a tension piece, wherein the pressing cover covers the opening of the double-ended pipe, the tension piece is arranged on the double-ended pipe, and the tension piece applies tension to the pressing cover towards the direction in which the double-ended pipe is positioned; the utility model discloses a device for pressing a sealing piece, which comprises a pressing cover, a pressing structure, a sealing piece and a first spring, wherein the pressing cover is arranged on the pressing cover, and the pressing structure is used for ensuring the sealing piece and the first spring, and the sealing piece is movably connected to the pressing cover, and the pressing structure has the beneficial effects that: the pipeline is closed and is carried the medium and lead to pipeline front end pressure value to increase because of inertia, and high-pressure medium can extrude the sealing member and remove, and the double-end pipe still seals through the convex part that compresses tightly the setting of lid lower part this moment, and under the transient high-pressure state, the convex part can not shift up, and the double-end pipe still keeps sealed, avoids carrying the frequent discharge of medium like this.

Description

Spring type safety valve

Technical Field

The utility model relates to the technical field of safety valves, in particular to a spring type safety valve.

Background

The spring type safety valve is characterized in that a valve or a plunger and other sealing elements of the valve are blocked by means of elastic pressure of a spring, and once the pressure of a pressure container is abnormal, high pressure generated by the pressure container overcomes the spring pressure of the safety valve, so that a blocking device is pushed open, a pressure release channel is formed, and the high pressure is released.

The spring type safety valve is connected to the conveying pipeline in series generally, and has the function of removing part of conveying medium in the pipeline when the pressure in the cover pipeline is too high, and the safety valve is always in a closed state when the pressure in the pipeline is not up to a set value. When the pipeline pressure is close to the set value of the safety valve, the pipeline valve is closed at the moment, the conveying medium is subjected to inertia action, and the pressure value at the front end of the pipeline is temporarily increased, so that the pressure value is larger than the set value, and the safety valve is temporarily opened.

Disclosure of Invention

The present utility model is directed to a spring type safety valve, which solves the above-mentioned drawbacks of the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a spring type relief valve, includes the valve body, be provided with the double-end pipe on the valve body, still include:

the sealing structure comprises a pressing cover and a tension piece, wherein the pressing cover covers the opening of the double-end pipe, the tension piece is arranged on the double-end pipe, and the tension piece applies tension to the pressing cover towards the direction of the double-end pipe;

the pre-compaction structure, the pre-compaction structure sets up compress tightly and cover, pre-compaction structure guarantees sealing member and first spring, sealing member swing joint is in compress tightly and cover, first spring sets up compress tightly in the lid, the one end of first spring is contradicted on the sealing member, the sealing member with the pipe wall sliding connection of double-end pipe.

Preferably, the pulling force piece includes first member, connecting piece, fixed plate, second member and second spring, connect through the connecting piece between first member and the second member, the fixed plate is installed on the double-end pipe, the second member runs through the fixed plate, the second spring activity cup joints the second member is outside.

Preferably, the ends of the first rod piece, which are close to each other, are respectively provided with external threads with opposite directions, and the connecting piece is simultaneously in threaded connection with the first rod piece and the second rod piece.

Preferably, the upper end of the second spring is abutted against the fixed plate, and the lower end of the second spring is abutted against the second rod member.

Preferably, the lower end of the pressing cover is provided with a convex part matched with the pipe wall of the double-ended pipe, and a sliding groove is formed in the pressing cover.

Preferably, the sealing element comprises a piston block, a central column and a limiting disc, wherein the piston block, the central column and the limiting disc are sequentially connected from bottom to top, one end of the central column penetrates into the sliding groove, the limiting disc is slidably connected into the sliding groove, and the piston block is matched with the inner wall of the double-head pipe.

Compared with the prior art, the utility model has the beneficial effects that: the spring type safety valve comprises: when the pipeline is closed, the pressure value of the front end of the pipeline is increased due to inertia, the high-pressure medium can squeeze the sealing element to move, at the moment, the double-head pipe is still closed through the convex part arranged at the lower part of the compression cover, the convex part cannot move upwards in a short-term high-pressure state, and the double-head pipe still keeps sealing, so that the frequent discharge of the conveying medium is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all of the features of the technology disclosed.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic diagram of an overall structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a partially enlarged structure according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a seal structure according to an embodiment of the present utility model.

In the figure: 10. a valve body; 11. a double-ended tube; 12. a pressing cover; 13. a convex portion; 14. a chute; 15. a first spring; 16. a piston block; 17. a center column; 18. a limiting disc; 19. a first rod member; 20. a connecting piece; 21. a fixing plate; 22. a second rod member; 23. and a second spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the terms "comprising" or "includes" and the like in this disclosure is intended to cover an element or article listed after that term and equivalents thereof without precluding other elements or articles. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides a spring type relief valve, includes valve body 10, is provided with double-end pipe 11 on the valve body 10, and the pipeline is connected respectively on the ring flange at valve body 10 both ends, and double-end pipe 11 is linked together with the medium circulation passageway in the valve body 10, still includes:

the sealing structure comprises a pressing cover 12 and a tension piece, wherein the pressing cover 12 covers the opening of the double-ended pipe 11, the tension piece is arranged on the double-ended pipe 11, and the tension piece applies tension to the pressing cover 12 towards the direction of the double-ended pipe 11; the opening of the double-end pipe 11 can be closed by pressing the pressing cover 12 at the opening at the upper end of the double-end pipe 11, and the pressing cover 12 is applied with tension by the tension piece to be plugged on the double-end pipe 11, when the medium pressure in the double-end pipe 11 is greater than the preset tension of the tension piece, the pressing cover 12 can be pushed open, and the double-end pipe 11 is decompressed;

the pre-compaction structure, pre-compaction structure setting is compressing tightly on the lid 12, and sealing member and first spring 15 are guaranteed to the pre-compaction structure, and sealing member swing joint is compressing tightly on the lid 12, and first spring 15 sets up in compressing tightly the lid 12, and the one end of first spring 15 is contradicted on the sealing member, sealing member and double-end pipe 11's pipe wall sliding connection. Through setting up the sealing member in the bottom that compresses tightly lid 12, sealing member swing joint is in the closing of double-end pipe 11 to utilize first spring 15 to extrude the sealing member, make it have decurrent trend, and when the pipeline is closed, the conveying medium produces the water hammer effect under inertial action, and then double-end pipe 11 internal pressure briefly increases, can upwards remove by the sealing member, and still have to compress tightly lid 12 to shutoff double-end pipe 11 this moment, double-end pipe 11 still keeps sealed like this, avoids conveying medium frequent pressure release like this.

The pulling force piece includes first member 19, connecting piece 20, fixed plate 21, second member 22 and second spring 23, connects through connecting piece 20 between first member 19 and the second member 22, and fixed plate 21 installs on double-end pipe 11, and second member 22 runs through fixed plate 21, and second spring 23 activity cup joints in the outside of second member 22. The second spring 23 is in a compressed state, the second spring 23 applies downward pressure to the second lever 22, and a fixed connection is made between the second lever 22 and the first lever 19. The upper end of the first rod 19 is mounted on the compression cover 12, and simultaneously can apply a pull-down force to the compression cover 12, so that the sealing of the compression cover 12 to the double-ended pipe 11 is ensured.

The adjacent ends of the first rod piece 19 and the second rod piece 22 are respectively provided with external threads with opposite directions, and the connecting piece 20 is simultaneously in threaded sleeve connection with the first rod piece 19 and the second rod piece 22. The upper end of the second spring 23 abuts against the fixed plate 21, and the lower end of the second spring 23 abuts against the second lever 22. By rotating the connecting piece 20, the distance between the first rod piece 19 and the second rod piece 22 is changed, when the distance is increased, the second spring 23 can rebound, the pulling force on the pressing cover 12 is reduced, and the pressing force on the pressing cover 12 can be correspondingly adjusted according to the requirement.

The lower extreme of compressing tightly lid 12 is provided with the convex part 13 with double-end pipe 11 pipe wall looks adaptation, and spout 14 has been seted up to compressing tightly the inside of lid 12. The convex part 13 is embedded in the double-ended pipe 11, so that the double-ended pipe 11 can be sealed, and the pressing cover 12 can drive the convex part 13 to move upwards to position the double-ended pipe 11 only when the pressure of a medium is continuously larger than the pressing force of the pressing cover 12.

The sealing member includes piston block 16, center post 17 and spacing dish 18, and piston block 16, center post 17 and spacing dish 18 are connected gradually from bottom to top, and the one end of center post 17 runs through to spout 14 in, and spacing dish 18 sliding connection is in spout 14, and piston block 16 and double-end pipe 11 inner wall looks adaptation. At pipeline pressure value short-term increase, can extrude piston piece 16 through the medium, piston piece 16 can upwards move to extrude first spring 15, carry out the displacement by piston piece 16, carry out certain pressure release to pipeline internal pressure, when pipeline internal pressure continuously increases, piston piece 16 can upwards move to the biggest position, and contradict on compressing tightly lid 12, the pressure is all transmitted to compressing tightly lid 12 this moment, compressing tightly lid 12 atress can upwards be shifted, knows that convex part 13 breaks away from double-end pipe 11, can realize the pressure release.

While certain exemplary embodiments of the present utility model have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the utility model, which is defined by the appended claims.

Claims (6)

1. The utility model provides a spring type relief valve, includes valve body (10), be provided with double-end pipe (11) on valve body (10), its characterized in that still includes:

the sealing structure comprises a pressing cover (12) and a tension piece, wherein the pressing cover (12) covers the opening of the double-end pipe (11), the tension piece is arranged on the double-end pipe (11), and the tension piece applies tension to the pressing cover (12) in the direction of the double-end pipe (11);

the pre-compaction structure, the pre-compaction structure sets up compress tightly on lid (12), pre-compaction structure guarantees sealing member and first spring (15), sealing member swing joint is in compress tightly on lid (12), first spring (15) set up compress tightly in lid (12), the one end of first spring (15) is contradicted on the sealing member, the sealing member with pipe wall sliding connection of double-end pipe (11).

2. A spring type safety valve according to claim 1, wherein: the tension member comprises a first rod member (19), a connecting member (20), a fixing plate (21), a second rod member (22) and a second spring (23), wherein the first rod member (19) and the second rod member (22) are connected through the connecting member (20), the fixing plate (21) is installed on the double-end pipe (11), the second rod member (22) penetrates through the fixing plate (21), and the second spring (23) is movably sleeved outside the second rod member (22).

3. A spring type safety valve according to claim 2, wherein: the connecting piece (20) is simultaneously in threaded connection with the first rod piece (19) and the second rod piece (22).

4. A spring type safety valve according to claim 2, wherein: the upper end of the second spring (23) is abutted against the fixed plate (21), and the lower end of the second spring (23) is abutted against the second rod piece (22).

5. A spring type safety valve according to claim 1, wherein: the lower extreme of compressing tightly lid (12) be provided with double-end pipe (11) pipe wall looks adaptation convex part (13), spout (14) have been seted up to the inside of compressing tightly lid (12).

6. A spring type safety valve according to claim 5, wherein: the sealing member includes piston block (16), center post (17) and spacing dish (18), piston block (16), center post (17) and spacing dish (18) are connected gradually from bottom to top, the one end of center post (17) runs through to in spout (14), spacing dish (18) sliding connection is in spout (14), piston block (16) with double-end pipe (11) inner wall looks adaptation.