CN209818836U

CN209818836U - Pressure maintaining valve

Info

Publication number: CN209818836U
Application number: CN201920404195.4U
Authority: CN
Inventors: 杨连田
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2019-12-20
Anticipated expiration: 2029-03-28

Abstract

The utility model relates to a pressure retaining valve, including the body, go out one side cooperation at the body and connect rotatory cover, be equipped with the valve body in rotatory cover, sliding fit connects the case in the valve body, connects the spring at the valve body overcoat, is equipped with the ladder through-hole in the valve body, and the case setting cup joints sealing washer and sealing ring device in the ladder through-hole on the case, and sealing washer and sealing ring device all correspond sealed cooperation with the ladder through-hole. The utility model has the advantages that: triple sealing is carried out through sealing washer and two sealing ring device, has improved the sealed effect of long-time use, and effectual pressure keeps the valve to use the back for a long time among the solution prior art, technical problem that the leakproofness descends.

Description

Pressure maintaining valve

Technical Field

The utility model relates to the technical field of valves, specifically a pressure retaining valve.

Background

The pressure maintaining valve, also called a back pressure valve, is a valve that creates a certain pressure due to the function of the valve, which is generally adjustable. Can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metal, radioactive media and the like. The device is generally arranged at the tail end of a pipeline system and plays a role in cutting off and throttling, and a fluid metering and adding system, a hydraulic control system, chemical reaction conditions, physical state critical state control and the like can be basically divided into two parts of regulation and overflowing.

When the device is applied to a gas pipeline, the necessary minimum pressure value in a pipeline system is effectively maintained, and the flow rate of gas passing through devices such as adsorption and filtration is controlled not to be too high, so that the adsorption and filtration devices are protected, and the gas purification effect is improved.

After the existing pressure retaining valve is used for a long time, the sealing performance is reduced, the performance of the pressure retaining valve is greatly influenced, the service life of the pressure retaining valve is further shortened, and therefore how to improve the sealing performance is the technical problem which needs to be solved urgently at the present stage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressure retaining valve to the pressure retaining valve who appears is carried in solving above-mentioned background art after long-time the use, and the leakproofness descends, has influenced the performance of pressure retaining valve greatly, and then has shortened the technical problem of the life of pressure retaining valve.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a pressure retaining valve, includes the body, goes out the cooperation of one side at the body and connects rotatory cover, is equipped with the valve body in rotatory cover, sliding fit connects the case in the valve body, connects spring, its characterized in that outside the valve body: the valve body is internally provided with a stepped through hole, the valve core is arranged in the stepped through hole, the valve core is sleeved with a sealing ring and a sealing ring device, and the sealing ring device are in corresponding sealing fit with the stepped through hole.

Preferably, the valve core comprises a main round rod, two ends of the main round rod are respectively provided with a side round rod, the diameter of each side round rod is smaller than that of the main round rod, at least one circular groove is formed in the main round rod, the sealing ring is sleeved on the side round rod in the front side of the valve core, and the sealing ring device is sleeved in the corresponding circular groove.

Preferably, the stepped through hole is a secondary stepped hole, and the sealing ring is arranged in a hole with a larger aperture of the stepped through hole.

Preferably, the sealing ring comprises a trumpet-shaped inner sealing elastic plate, a sleeving hole is formed in the inner side of the inner sealing elastic plate, a trumpet-shaped outer sealing elastic plate is obliquely arranged on the outer side of the inner sealing elastic plate, a sealing flange is arranged on the outer side of the outer sealing elastic plate, and the sealing flange is in corresponding sealing fit with the stepped through hole.

Preferably, the sealing ring device comprises an inner sealing ring, an outer sealing ring is sleeved on the outer side of the inner sealing ring, and an elastic ring is arranged between the inner sealing ring and the outer sealing ring.

Preferably, the inner sealing ring comprises an inner ring body, a convex ring is arranged on the outer side of the inner ring body, two annular grooves are formed in the two sides of the convex ring, the two annular grooves are symmetrically arranged, a first annular clamping groove with a convex cross section is formed in the outer side of the convex ring, and the inner side of the elastic ring is correspondingly clamped in the first annular clamping groove.

Preferably, the inner side of the outer sealing ring is provided with a second annular clamping groove with a convex cross section, and the outer side of the elastic ring is correspondingly clamped in the second annular clamping groove.

Preferably, the elastic ring comprises an inner clamping plate, the outer clamping plate is connected to the outer side of the inner clamping plate through two annular plates which are symmetrically arranged in an inclined mode, a first concave surface is arranged on the inner side of the inner clamping plate, and a second concave surface is arranged on the outer side of the outer clamping plate.

Preferably, the two annular plates are obliquely arranged outwards from the inner clamping plate.

Compared with the prior art, the beneficial effects of the utility model are that: triple sealing is carried out through sealing washer and two sealing ring device, has improved the sealed effect of long-time use, and effectual pressure keeps the valve to use the back for a long time among the solution prior art, technical problem that the leakproofness descends.

Drawings

Fig. 1 is a schematic diagram of the basic structure of the present invention;

FIG. 2 is a schematic view of the assembled structure of FIG. 1;

FIG. 3 is a schematic view of the valve body and valve cartridge in combination;

FIG. 4 is a schematic structural view of a seal ring;

FIG. 5 is a schematic view of the structure of the sealing ring device;

fig. 6 is a partial cross-sectional view of the fig. 5 assembly.

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 belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1, fig. 2 and fig. 3, the utility model relates to a pressure retaining valve, including body 1, go out one side cooperation at body 1 and connect rotatory cover 6, be equipped with valve body 2 in rotatory cover 6, sliding fit connects case 3 in valve body 2, connects spring 5 at 2 overcoat of valve body, and above-mentioned each technical characteristics and cooperation are prior art, and concrete structure does not describe with the cooperation relation tiredly, and the innovation point of this application is as follows: the valve body 2 is internally provided with a stepped through hole 2.1, the stepped through hole 2.1 is a two-stage circular through hole, the valve core 3 is arranged in the stepped through hole 2.1, the valve core 3 is sleeved with a sealing ring 11 and a sealing ring device 7, and the sealing ring 11 and the sealing ring device 7 are in corresponding sealing fit with the stepped through hole 2.1. The sealing ring 11 and the sealing ring device 7 are sealed in a triple mode, the sealing effect of long-time use is improved, and the technical problem that the sealing performance of the pressure retaining valve is reduced after the pressure retaining valve is used for a long time in the prior art is effectively solved.

The valve core 3 comprises a main round rod 3.1, two ends of the main round rod 3.1 are respectively provided with a side round rod 3.2, the diameter of each side round rod 3.2 is smaller than that of the main round rod 3.1, the main round rod 3.1 is provided with two circular grooves 3.3, the sealing ring 11 is sleeved on the side round rod 3.2 on the front side of the valve core 3, and the sealing ring 11 is arranged in a hole with a larger aperture of the stepped through hole 2.1. The sealing ring device 7 is sleeved in the corresponding circular groove 3.3.

As shown in fig. 4, the sealing ring 11 is a rubber ring, and has a specific structure: the sealing structure comprises a trumpet-shaped inner sealing elastic plate 11.1, a sleeving hole 11.2 is formed in the inner side of the inner sealing elastic plate 11.1, a trumpet-shaped outer sealing elastic plate 11.3 is obliquely arranged on the outer side of the inner sealing elastic plate 11.1, and the trumpet opening direction of the inner sealing elastic plate 11.1 is opposite to the trumpet opening direction of the outer sealing elastic plate 11.3. And a sealing flange 11.4 is arranged on the outer side of the outer sealing elastic plate 11.3, and the sealing flange 11.4 is correspondingly matched with the larger aperture of the stepped through hole 2.1 in a sealing manner. The elasticity of the sealing ring 11 is increased through the structure arrangement of the inner sealing elastic plate 11.1 and the outer sealing elastic plate 11.3, the contact area between the sealing ring 11 and the stepped through hole 2.1 is increased through the arranged sealing flange 11.4, and then the sealing performance is increased.

Referring to fig. 5 and 6, the sealing ring device 7 includes an inner sealing ring 9, an outer sealing ring 8 is sleeved on the outer side of the inner sealing ring 9, an elastic ring 10 is disposed between the inner sealing ring 9 and the outer sealing ring 8, and the specific structures and the matching relations of the inner sealing ring 9, the elastic ring 10 and the outer sealing ring 8 are as follows.

The inner sealing ring 9, the elastic ring 10 and the outer sealing ring 8 are all made of rubber, wherein the inner sealing ring 9 comprises a circular inner ring body 9.1, and the inner ring body 9.1 is clamped in the circular groove 3.3. The outer side of the inner ring body 9.1 is provided with a convex ring 9.2, the inner ring body 9.1 and the convex ring 9.2 are of an integral structure, the width of the convex ring 9.2 is smaller than that of the inner ring body 9.1, and the transverse middle tangent plane of the convex ring 9.2 is coplanar with that of the inner ring body 9.1. Two annular grooves 9.3 are arranged on two sides of the convex ring 9.2, the two annular grooves 9.3 are symmetrically arranged, and a first annular clamping groove 9.4 with a convex cross section is arranged on the outer side of the convex ring 9.2.

The width of the outer sealing ring 8 is equal to that of the inner sealing ring 9, and the diameter of the inner circle of the outer sealing ring 8 is larger than that of the outer circle of the inner ring 9.1. And a second annular clamping groove 8.1 with a convex cross section is formed in the inner side of the outer sealing ring 8.

The elastic ring 10 comprises an inner clamping plate 10.1, the outer clamping plate 10.3 is connected to the outer side of the inner clamping plate 10.1 through two symmetrical annular plates 10.2 which are obliquely arranged, and the two annular plates 10.2 are obliquely arranged outwards from the inner clamping plate 10.1. A first concave surface 10.4 is arranged on the inner side of the inner clamping plate 10.1, and a second concave surface 10.5 is arranged on the outer side of the outer clamping plate 10.3. The inner clamping plate 10.1 is correspondingly clamped in the first ring-shaped clamping groove 9.4, the width of the inner clamping plate 10.1 is smaller than the groove width of the first ring-shaped clamping groove 9.4, the outer clamping plate 10.3 is correspondingly clamped in the second ring-shaped clamping groove 8.1, and the width of the outer clamping plate 10.3 is smaller than the groove width of the second ring-shaped clamping groove 8.1. Elastic ring 10 has effectually guaranteed elastic ring 10's elasticity under the combined action of the annular plate 10.2 of two slopes, first concave surface 10.4 and second concave surface 10.5 for sealing ring device 7 is when using, and outer seal ring 8 can fully contact ladder through-hole 2.1 even the surface of outer seal ring 8 has wearing and tearing, can not influence sealing performance yet, has improved sealing performance greatly.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pressure retaining valve, includes body (1), goes out one side cooperation at body (1) and connects rotatory cover (6), is equipped with valve body (2) in rotatory cover (6), sliding fit connects case (3) in valve body (2), cup joints spring (5) its characterized in that outside valve body (2): be equipped with ladder through-hole (2.1) in valve body (2), case (3) set up in ladder through-hole (2.1), cup joint sealing washer (11) and sealing ring device (7) on case (3), and sealing washer (11) and sealing ring device (7) all correspond sealed cooperation with ladder through-hole (2.1).

2. A pressure maintenance valve according to claim 1, wherein: the valve core (3) comprises a main round rod (3.1), two ends of the main round rod (3.1) are respectively provided with a side round rod (3.2), the diameter of the side round rod (3.2) is smaller than that of the main round rod (3.1), at least one circular groove (3.3) is formed in the main round rod (3.1), the sealing ring (11) is sleeved on the side round rod (3.2) of the front side of the valve core (3), and the sealing ring device (7) is sleeved in the corresponding circular groove (3.3).

3. A pressure maintenance valve according to claim 1, wherein: the stepped through hole (2.1) is a secondary stepped hole, and the sealing ring (11) is arranged in the hole with the larger aperture of the stepped through hole (2.1).

4. A pressure maintenance valve according to claim 1 or 3, wherein: sealing washer (11) are equipped with cup joint hole (11.2) including the interior seal elastic plate (11.1) of tubaeform, including the inboard of seal elastic plate (11.1), including seal elastic plate (11.1) outside slope set up tubaeform outer seal elastic plate (11.3), are equipped with sealing flange (11.4) in the outside of outer seal elastic plate (11.3), sealing flange (11.4) with ladder through-hole (2.1) correspond sealed cooperation.

5. A pressure maintenance valve according to claim 1, wherein: the sealing ring device (7) comprises an inner sealing ring (9), an outer sealing ring (8) is sleeved on the outer side of the inner sealing ring (9), and an elastic ring (10) is arranged between the inner sealing ring (9) and the outer sealing ring (8).

6. A pressure maintenance valve according to claim 5, wherein: the inner sealing ring (9) comprises an inner ring body (9.1), a convex ring (9.2) is arranged on the outer side of the inner ring body (9.1), two annular grooves (9.3) are arranged on two sides of the convex ring (9.2) symmetrically, a first annular clamping groove (9.4) with a convex cross section is arranged on the outer side of the convex ring (9.2), and the inner side of an elastic ring (10) corresponds to the inner side of the first annular clamping groove (9.4).

7. A pressure maintenance valve according to claim 5, wherein: the inner side of the outer sealing ring (8) is provided with a second annular clamping groove (8.1) with a convex cross section, and the outer side of the elastic ring (10) is correspondingly clamped in the second annular clamping groove (8.1).

8. A pressure maintenance valve according to claim 5, wherein: the elastic ring (10) comprises an inner clamping plate (10.1), the outer clamping plate (10.3) is connected to the outer side of the inner clamping plate (10.1) through two annular plates (10.2) which are symmetrically and obliquely arranged, a first concave surface (10.4) is arranged on the inner side of the inner clamping plate (10.1), and a second concave surface (10.5) is arranged on the outer side of the outer clamping plate (10.3).

9. A pressure maintenance valve according to claim 8, wherein: the two annular plates (10.2) are arranged obliquely outwards from the inner clamping plate (10.1).