CN214274604U

CN214274604U - Pressure reducing valve sealing structure and pressure reducing valve

Info

Publication number: CN214274604U
Application number: CN202022882401.8U
Authority: CN
Inventors: 耿德占
Original assignee: Individual
Current assignee: Zhongke Aier Beijing Technology Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-09-24
Anticipated expiration: 2030-12-04

Abstract

The utility model provides a pressure reducing valve sealing structure and a pressure reducing valve, which comprise a valve cover, a valve body, a spring component and a diaphragm component; a spring cavity is formed in the valve cover, and a concave cavity is formed at the opening end of the valve cover; the concave cavity and the spring cavity form a cavity of a step structure which is communicated; a boss is convexly arranged on one side of the valve body, a gas storage cavity is formed in the boss, and the valve body is arranged in the concave cavity through the boss; the diaphragm assembly is arranged between the step structure and the boss and used for sealing the gas storage cavity; the spring component is arranged in the spring cavity, one end of the spring component is abutted against one end face, far away from the concave cavity, of the spring cavity, and the other end of the spring component is abutted against the diaphragm component; the utility model provides a pressure reducing valve sealing structure, in particular to a high-purity gas pressure reducing valve; the utility model provides a scheme is favorable to parts machining and electrolytic polishing, obtains the required electrolytic polishing face of high-purity gas more easily, has improved the leakproofness of relief pressure valve greatly, has reduced the outer leak rate of relief pressure valve.

Description

Pressure reducing valve sealing structure and pressure reducing valve

Technical Field

The utility model belongs to the technical field of relief pressure valve seal structure, concretely relates to relief pressure valve seal structure and relief pressure valve.

Background

The ultrahigh pure gas pressure reducing valve is applied to ultrahigh pure gas pipelines and ultrahigh pure gas equipment, and the valve seal of the ultrahigh pure gas pressure reducing valve is generally divided into a soft seal and a hard seal; the hard seal adopts a metal-to-metal sealing mode, generally adopts a single-layer metal sealing mode, and has strict requirements on the properties of surface roughness, corrosion resistance, hardness and the like of sealing pair metal due to the fact that the hard seal is mainly applied to the conditions of high purity and high pressure, but the single-layer metal seal still cannot meet the requirements of ultra-pure gas on the sealing property due to the fact that the flexibility and the elasticity of metal are poor.

Based on the technical problems existing in the ultra-high purity gas pressure reducing valve, no relevant solution exists; there is therefore a pressing need to find effective solutions to the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the weak point that exists among the above-mentioned technique, provide a relief pressure valve seal structure and relief pressure valve, aim at solving the poor problem of current relief pressure valve leakproofness.

The utility model provides a pressure reducing valve sealing structure, which comprises a valve cover, a valve body, a spring component and a diaphragm component; a spring cavity is formed in the valve cover, and a concave cavity is formed at the opening end of the valve cover; the concave cavity and the spring cavity form a cavity of a step structure which is communicated; a boss is convexly arranged on one side of the valve body, a gas storage cavity is formed in the boss, and the valve body is arranged in the concave cavity through the boss; the diaphragm assembly is arranged between the step structure and the boss and used for sealing the gas storage cavity; the spring component is arranged in the spring cavity, one end of the spring component is abutted to one end face, far away from the cavity, of the spring cavity, and the other end of the spring component is abutted to the diaphragm component.

Further, the diaphragm assembly comprises a metal diaphragm, and the metal diaphragm is arranged at the step structure; one end of the boss close to the metal diaphragm is convexly provided with a blocking structure; the plugging structure is abutted against the metal diaphragm, so that the gas storage cavity forms a sealing structure.

Further, the plugging structure is a double-peak structure; the double-peak structure is contacted with the metal membrane to form two annular sealing rings.

Furthermore, the diaphragm assembly also comprises a diaphragm lower pressing block and a nut; one end of the diaphragm lower pressing block penetrates through the center of the metal diaphragm, protrudes out of the end face of the metal diaphragm, is positioned on the spring cavity, and is locked through a nut; the spring member includes adjusting spring, and adjusting spring one end cup joints on the nut, and adjusting spring's the other end butt is kept away from on the terminal surface of cavity in the spring chamber.

Further, the valve cover comprises a housing; the pressure reducing valve sealing structure also comprises a spring adjusting mechanism, and the spring adjusting mechanism comprises a handle and an ejector rod; the spring component comprises a gasket, and the gasket is arranged in the spring cavity and is positioned at the top of the adjusting spring; one end of the ejector rod penetrates through the top of the shell and extends into the spring cavity to abut against the adjusting spring; the other end of the ejector rod is fixedly connected with the handle, and the handle can drive the ejector rod to move in the spring cavity in a telescopic mode through rotation.

Furthermore, the spring component also comprises a gasket which is arranged in the spring cavity and is positioned at one end of the adjusting spring, which is far away from the metal diaphragm; one end of the ejector rod extending into the spring cavity is abutted against the gasket.

Further, the inner diameter of the concave cavity is larger than that of the spring cavity, so that a T-shaped cavity is formed in the shell; the shell is of a T-shaped structure.

Correspondingly, the utility model also provides a pressure reducing valve, which comprises a sealing structure; the sealing structure is the pressure reducing valve sealing structure.

Further, the pressure reducing valve also comprises a valve core; a valve core cavity, an air inlet channel and an air outlet channel are arranged in the valve body; one end of the air inlet channel is communicated with an air inlet of the valve body, the other end of the air inlet channel is communicated with the valve core cavity, one end of the air outlet channel is communicated with the air storage cavity, the other end of the air outlet channel is communicated with an air outlet of the valve body, and the valve core cavity is also communicated with the air storage cavity; the valve core is arranged in the valve core cavity and used for adjusting the opening of the gas entering the gas storage cavity.

Further, the valve core comprises a valve needle, a valve seat and a valve core sealing gasket; the valve seat is arranged in the valve core cavity in a sealing way through the valve core sealing gasket; one end of the valve needle penetrates through the valve seat and extends into the air storage cavity to be connected with the diaphragm lower pressing block on the diaphragm assembly; one end of the valve needle is telescopically arranged on the valve core sealing gasket, so that the opening degree of gas entering the gas storage cavity is adjusted.

Further, the pressure reducing valve is an ultra-high purity gas pressure reducing valve.

The utility model provides a sealing structure of a pressure reducing valve, in particular to a high-purity gas pressure reducing valve; the utility model provides a relief pressure valve seal structure is favorable to parts machining and electropolishing, obtains the required electropolishing face of high-purity gas more easily, has improved the leakproofness of relief pressure valve greatly, has reduced the outer leak rate of relief pressure valve.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The present invention will be further explained with reference to the accompanying drawings:

FIG. 1 is a sectional view of a pressure reducing valve of the present invention;

fig. 2 is an enlarged schematic view of a portion a of fig. 1.

In the figure: 1. a pressure reducing valve; 2. a valve cover; 3. a valve body; 4. a valve core; 5. a spring member; 6. a diaphragm assembly; 7. a housing; 8. a handle; 9. a gasket; 10. adjusting the spring; 11. a valve needle; 12. a valve seat; 13. a spool seal; 14. a metal diaphragm; 15. pressing the membrane into a block; 16. a nut; 17. an air intake passage; 18. an air outlet channel; 19. a gas storage cavity; 20. a spring cavity; 21. a top rod; 22. a boss; 23. a bimodal structure.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", 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 simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 to 2, the utility model provides a sealing structure of a pressure reducing valve, in particular to a hard sealing structure of a pressure reducing valve; the sealing structure comprises a valve cover 2, a valve body 3, a spring component 5 and a diaphragm component 6; a spring cavity 20 is formed in the valve cover 2, and a concave cavity is formed at the opening end of the valve cover 2; the concave cavity and the spring cavity 20 form a communicated cavity with a step structure; a boss 22 is convexly arranged on one side of the valve body 3, an air storage cavity 19 is formed in the boss 22, and the valve body 3 is arranged in the concave cavity through the boss 22; the diaphragm assembly 6 is arranged between the step structure and the boss and used for sealing the air storage cavity 19. Specifically, the valve body 3 is hermetically arranged in the cavity through the boss 22, and the diaphragm assembly 6 is clamped between the top surface of the boss 22 and the bottom surface of the cavity, so that the sealing effect is achieved; further, the spring member 5 is disposed in the spring cavity 20, one end of the spring member 5 abuts against one end surface of the spring cavity 20 away from the cavity, and the other end of the spring member 5 abuts against the diaphragm assembly 6. It will be appreciated that the length of the spring member 5 in its natural state is greater than the height of the spring cavity 20. This enables the force of the entire spring member 5 to urge a clamping seal between the diaphragm assembly and the boss; the utility model provides a relief pressure valve seal structure, simple structure, convenient assembly for whole seal structure's hard sealed effect is better.

Preferably, in combination with the above technical solution, as shown in fig. 1 to 2, the diaphragm assembly 6 includes a metal diaphragm 14, which is disposed at the step structure. Specifically, the metal diaphragm 14 is sealingly disposed on the bottom surface of the cavity, thereby separating the spring chamber 20 and the air reservoir chamber 19. Further, a blocking structure is convexly arranged at one end of the boss 22 close to the metal membrane. The boss 22 abuts against the metal diaphragm 14 through the blocking structure thereof, so that the air storage cavity 19 forms a sealing structure.

Preferably, in combination with the above solutions, as shown in fig. 1 to 2, in the present embodiment, the blocking structure is a double-peak structure 23, and the double-peak structure 23 contacts with the metal membrane 14 to form two annular sealing rings. Specifically, the double-peak structure 23 forms a double-layer hard sealing structure, and a micro double-peak structure is formed by modifying the contact end surface of the boss 22 on the upper part of the valve body 3 and the metal diaphragm 14, so that two circular line seals are formed with the metal diaphragm 14, and the sealing performance is improved.

Preferably, in combination with the above, as shown in fig. 1 to 2, the diaphragm assembly 6 includes a diaphragm depressing block 15 and a nut 16. One end of the diaphragm pressing block 15 penetrates through the center of the metal diaphragm 14, protrudes from the end face of the metal diaphragm 14 located in the spring cavity 20, and is locked by the nut 16. Further, the spring member 5 comprises an adjusting spring 10, and one end of the adjusting spring 10 is sleeved on the nut 16, so that the adjusting spring can be positioned and prevented from moving. The other end of the adjusting spring 10 abuts against an end face of the spring chamber 20 remote from the cavity.

Preferably, in combination with the above, as shown in fig. 1 to 2, the valve cap 2 comprises a housing 7. The pressure reducing valve sealing structure further comprises a spring adjusting mechanism which comprises a handle 8 and a push rod 21. One end of the push rod 21 passes through the top of the housing 7 and extends into the spring chamber 20 to abut against the adjusting spring 10. The other end of the ejector rod 21 is fixedly connected with the handle 8, the handle 8 can drive the ejector rod 21 to move in the spring cavity 20 in an extending and contracting mode through rotation, and then the acting force of the adjusting spring 10 acting on the metal diaphragm 14 is adjusted through the ejector rod 21.

Preferably, in combination with the above solution, as shown in fig. 1 to 2, the spring member 5 further includes a spacer 9, and the spacer 9 is disposed in the spring cavity 20 and is fixedly disposed at an end of the adjusting spring 10 away from the metal diaphragm. One end of the ejector rod extending into the spring cavity is abutted against the gasket 9, so that the abutting stability can be improved, and the stress is concentrated.

Preferably, in combination with the above, as shown in fig. 1 to 2, the inner diameter of the concave cavity is larger than the inner diameter of the spring cavity 20, so that a T-shaped cavity is formed in the housing 7. The shell 7 is of a T-shaped structure, so that the processing and forming are convenient.

Correspondingly, in combination with the above scheme, as shown in fig. 1 to 2, the present invention further provides a pressure reducing valve, which is an ultra-pure gas pressure reducing valve. Specifically, the pressure reducing valve includes a sealing structure; the sealing structure is the pressure reducing valve sealing structure. Further, the pressure reducing valve 1 is a valve used for reducing the pressure of a working fluid, mainly a high-pressure gas, to a working pressure or an atmospheric pressure, and is used in a supply passage connected to a gas supply source such as a high-pressure vessel, a discharge passage communicating with the atmosphere, and the like. In fig. 1, F is the gas flow direction.

Preferably, with the above solution, as shown in fig. 1 to 2, the pressure reducing valve 1 further provided by the present invention further includes a valve core 4. The valve body 3 is internally provided with a valve core cavity, an air inlet channel 17 and an air outlet channel 18. One end of the air inlet channel 17 is communicated with an air inlet of the valve body 3, the other end of the air inlet channel 17 is communicated with the valve core cavity, one end of the air outlet channel 18 is communicated with the air storage cavity 19, the other end of the air outlet channel 18 is communicated with an air outlet of the valve body 3, and the valve core cavity is also communicated with the air storage cavity 19. Wherein, the valve core 4 is arranged in the valve core cavity and used for adjusting the opening of the gas entering the gas storage cavity 19 so as to adjust the pressure of the gas pressure.

Preferably, in combination with the above solution, as shown in fig. 1 to 2, the cartridge 4 includes a needle 11, a valve seat 12, and a cartridge packing 13. The valve seat 12 is hermetically arranged in the valve core cavity through a valve core sealing gasket 13. One end of the valve needle 11 penetrates through the valve seat 12 and extends into the air storage cavity 19 to be connected with the diaphragm pressing block 15 on the diaphragm assembly 6. One end of the valve needle 11 is telescopically arranged on the valve core sealing gasket 13, so that the opening degree of gas entering the gas storage cavity 19 is adjusted.

The utility model provides a relief pressure valve seal structure, concretely relates to high-purity gas relief pressure valve. The utility model provides a relief pressure valve seal structure is favorable to parts machining and electropolishing, obtains the required electropolishing face of high-purity gas more easily, has improved the leakproofness of relief pressure valve greatly, has reduced the outer leak rate of relief pressure valve.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any way. The technical solutions of the present invention can be used by anyone skilled in the art to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations, without departing from the scope of the technical solution of the present invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the present invention are all within the protection scope of the present invention.

Claims

1. A sealing structure of a pressure reducing valve is characterized by comprising a valve cover (2), a valve body (3), a spring component (5) and a diaphragm assembly (6);

a spring cavity (20) is formed in the valve cover (2), and a concave cavity is formed at the opening end of the valve cover (2); the concave cavity and the spring cavity (20) form a cavity body of a communicated step structure;

a boss (22) is arranged on one side of the valve body (3) in a protruding mode, an air storage cavity (19) is formed in the boss (22), and the valve body (3) is arranged in the concave cavity through the boss (22);

the diaphragm assembly (6) is arranged between the step structure and the boss and used for sealing the air storage cavity;

the spring component (5) is arranged in the spring cavity (20), one end of the spring component (5) abuts against one end face, far away from the concave cavity, of the spring cavity (20), and the other end of the spring component (5) abuts against the diaphragm assembly (6).

2. The pressure reducing valve sealing structure according to claim 1, wherein the diaphragm assembly (6) includes a metal diaphragm (14), the metal diaphragm (14) being provided at the stepped structure; one end of the boss (22) close to the metal diaphragm is provided with a blocking structure in a protruding mode; the blocking structure is abutted against the metal diaphragm (14), so that the gas storage cavity (19) forms a sealing structure.

3. The pressure relief valve sealing structure of claim 2, wherein the plugging structure is a double-hump structure; the double-peak structure is contacted with the metal membrane (14) to form two annular sealing rings.

4. The pressure reducing valve sealing structure according to claim 2, wherein the diaphragm assembly (6) further includes a diaphragm depressing block (15) and a nut (16); one end of the diaphragm lower pressing block (15) penetrates through the center of the metal diaphragm (14), is arranged on the end face, located on the spring cavity (20), of the metal diaphragm (14) in a protruding mode, and is locked through the nut (16);

the spring component (5) comprises an adjusting spring (10), one end of the adjusting spring (10) is sleeved on the nut (16), and the other end of the adjusting spring (10) abuts against one end face, far away from the cavity, of the spring cavity (20).

5. The pressure reducing valve sealing structure according to claim 4, wherein the valve cover (2) includes a housing (7); the pressure reducing valve sealing structure further comprises a spring adjusting mechanism, and the spring adjusting mechanism comprises a handle (8) and an ejector rod (21); one end of the ejector rod (21) penetrates through the top of the shell (7) and extends into the spring cavity (20) to abut against the adjusting spring (10); the other end of the ejector rod (21) is fixedly connected with the handle (8), and the handle (8) can drive the ejector rod (21) to move in the spring cavity (20) in a stretching mode through rotation.

6. The pressure reducing valve sealing structure according to claim 5, wherein the spring member (5) further comprises a gasket (9), the gasket (9) being disposed in the spring cavity (20) at an end of the regulating spring (10) remote from the metal diaphragm; one end of the ejector rod extending into the spring cavity is abutted against the gasket (9).

7. The pressure reducing valve sealing structure according to claim 5, wherein the cavity has an inner diameter larger than that of the spring chamber (20), so that a T-shaped cavity is formed in the housing (7); the shell (7) is of a T-shaped structure.

8. A pressure relief valve comprising a seal arrangement, wherein the seal arrangement is a pressure relief valve seal arrangement as claimed in any one of claims 1 to 7.

9. The pressure reducing valve according to claim 8, further comprising a spool (4); a valve core cavity, an air inlet channel (17) and an air outlet channel (18) are arranged in the valve body (3) of the sealing structure; one end of the air inlet channel (17) is communicated with an air inlet of the valve body (3), the other end of the air inlet channel (17) is communicated with the valve core cavity, one end of the air outlet channel (18) is communicated with the air storage cavity (19) of the sealing structure, the other end of the air outlet channel (18) is communicated with an air outlet of the valve body (3), and the valve core cavity is also communicated with the air storage cavity (19); the valve core (4) is arranged in the valve core cavity and used for adjusting the opening of gas entering the gas storage cavity (19).

10. The pressure reducing valve according to claim 9, wherein the cartridge (4) comprises a needle (11), a seat (12) and a cartridge gasket (13); the valve seat (12) is hermetically arranged in the valve core cavity through the valve core sealing gasket (13); one end of the valve needle (11) penetrates through the valve seat (12) and extends into the air storage cavity (19) to be connected with a lower diaphragm pressing block (15) on a diaphragm assembly (6) of the sealing structure; one end of the valve needle (11) is telescopically arranged on the valve core sealing gasket (13), so that the opening degree of gas entering the gas storage cavity (19) is adjusted.