CN116025749A - High-pressure safety valve - Google Patents
High-pressure safety valve Download PDFInfo
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- CN116025749A CN116025749A CN202211650944.4A CN202211650944A CN116025749A CN 116025749 A CN116025749 A CN 116025749A CN 202211650944 A CN202211650944 A CN 202211650944A CN 116025749 A CN116025749 A CN 116025749A
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- clack
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Abstract
The invention relates to a high-pressure safety valve, which comprises a valve seat, a valve body, a valve cover and a valve cap, wherein the valve seat is provided with a convex part; the valve body is arranged on the valve seat; the valve cover is connected with the valve body, and a graphite gasket is arranged between the valve cover and the valve body; the valve cap is connected to the valve cap, the valve cap with be provided with seal structure between the valve cap. The invention designs the valve body, the valve cover and the valve cap with brand new structures, and graphite gaskets are adopted between the valve body and the valve cover, so that the gasket coefficient and the sealing specific pressure are reduced, the requirement on the sealing surface pressing force can be reduced, the influence of high back pressure on the pressure bearing piece in the prior art is overcome, the application range of high-pressure safety valve series products with the grade of an inlet and an outlet is expanded, and the market demand can be better met.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a high-pressure safety valve.
Background
The safety valve is a special device for overpressure protection of a pressure system and is an automatic valve. When the system pressure reaches the set pressure, it does not use any external force, but uses the force of the medium itself to expel a certain rated amount of fluid to prevent the pressure in the system from exceeding the predetermined safety value. When the pressure returns to normal, the valve will close again to prevent further flow of medium. With the popularity of safety valve applications, there is a higher demand on the market for high pressure performance of safety valves, requiring that the pressure-bearing members such as valve bodies and valve covers withstand the high additional back pressure of the outlet, e.g., 600 lbs. and 900 lbs. However, the outlet back pressure which can be borne by the conventional safety valve in the market at present is generally 150 pounds or 300 pounds, and the pressure bearing capacity of the valve body, the valve cover and other pressure bearing parts in the second pressure bearing area is far less than 900 pounds. And the sealing surfaces between the valve body and the valve cover and between the valve cover and the valve cover of the safety valve in the prior art are generally sealed by adopting metal gaskets, and for the safety valve with high-pound-level outlet pressure, if the sealing is continuously carried out by adopting the metal gaskets, the valve body, the valve cover and the valve cover are required to have larger structural dimensions, and the materials of bolts are also required to have higher requirements, so that the sealing structure of the safety valve with high-pound-level outlet pressure is required to be optimized.
Therefore, there is an urgent need to provide a high pressure relief valve to overcome the above-mentioned technical drawbacks of the prior art.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the technical defects in the prior art, and provide the high-pressure safety valve which is provided with the valve body, the valve cover and the valve cap with brand new structures, wherein the valve body and the valve cover adopt graphite gaskets, so that the gasket coefficient and the sealing specific pressure are reduced, the requirement on the pressing force of the sealing surface can be reduced, the influence of the high back pressure on the pressure bearing piece in the prior art is overcome, the application range of the high-pressure safety valve series products with the inlet and outlet grades is expanded, and the market demand can be better met.
In order to solve the above technical problems, the present invention provides a high pressure relief valve, comprising:
a valve seat having a convex portion;
a valve body provided on the valve seat;
the valve cover is connected with the valve body, and a graphite gasket is arranged between the valve cover and the valve body;
and the valve bonnet is connected with the valve cover, and a sealing structure is arranged between the valve bonnet and the valve cover.
In one embodiment of the invention, the valve further comprises a valve flap, wherein the valve flap is arranged on the convex part of the valve seat.
In one embodiment of the invention, the bottom of the flap is provided with a conical seal.
In one embodiment of the invention, the valve further comprises a valve rod, wherein one end of the valve rod passes through the valve cover and extends into the valve cap, and the other end of the valve rod passes through the valve cover and is connected with the valve clack.
In one embodiment of the invention, a connecting part is arranged at one end of the valve rod for connecting the valve clack, a clamping groove is arranged on the connecting part, a groove capable of accommodating the connecting part therein is arranged at one end of the valve clack, and a buckle capable of being clamped in the clamping groove is arranged at the outer edge of the groove.
In one embodiment of the invention, the valve further comprises a guide sleeve, and the guide sleeve is sleeved on the outer wall of the valve clack.
In one embodiment of the invention, graphite gaskets are provided between the guide sleeve and the valve body and/or between the guide sleeve and the valve cover.
In one embodiment of the invention, the graphite gasket is a flexible graphite gasket.
In one embodiment of the invention, the valve rod further comprises a spring and a spring seat, wherein the spring is sleeved on the valve rod, and two ends of the spring are connected with the spring seat.
In one embodiment of the invention, the sealing structure is an O-ring.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the high-pressure safety valve, the valve body, the valve cover and the valve cap with brand new structures are designed, and the graphite gasket is adopted between the valve body and the valve cover, so that the gasket coefficient and the sealing specific pressure are reduced, the requirement on the pressing force of the sealing surface can be reduced, the influence of the high back pressure on the pressure bearing piece in the prior art is overcome, the application range of the high-pressure safety valve series products with the same level of an inlet and an outlet is expanded, and the market demand can be better met.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.
Fig. 1 is a schematic structural diagram of a high-pressure relief valve according to the present invention.
FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1.
The reference numerals in the figures illustrate: 11. a valve seat; 111. a convex portion; 12. a valve body; 13. a valve cover; 14. a valve cap; 15. a valve flap; 151. a conical sealing surface; 16. a valve stem; 161. a connection part; 17. guide sleeve; 18. a gasket; 19. a spring; 20. a spring seat; 21. and (5) a sealing structure.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Referring to fig. 1 and 2, an embodiment of the present invention provides a high pressure relief valve having a structure including a valve seat 11, a valve body 12, a valve cover 13, and a valve cap 14, wherein the valve seat 11 has a protrusion 111; a valve body 12 is arranged on the valve seat 11; the valve cover 13 is connected with the valve body 12, and a graphite gasket 18 is arranged between the valve cover 13 and the valve body 12; the valve cap 14 is connected with the valve cap 13, and a sealing structure 21 is arranged between the valve cap 14 and the valve cap 13.
According to the high-pressure safety valve, the valve body 12, the valve cover 13 and the valve cap 14 with brand new structures are designed, the graphite gasket 18 is adopted between the valve body 12 and the valve cover 13, the coefficient of the gasket 18 and the sealing specific pressure are reduced, the requirement on the sealing surface pressing force can be reduced, the influence of high back pressure on a pressure bearing piece in the prior art is overcome, the application range of the high-pressure safety valve series products with the grade of an inlet and an outlet is expanded, and the market demand can be better met.
The high-pressure safety valve further comprises the valve clack 15, the valve clack 15 is arranged on the convex part 111 of the valve seat 11, a conical sealing part is arranged at the bottom of the valve clack 15, the guide outer surface of the valve clack 15, the conical sealing surface 151, the guide inner surface of the valve seat 11 and the inner opening of the sealing surface are simultaneously processed and molded, so that concentricity is ensured, and the valve clack 15 can flexibly and accurately move up and down in the guide inner hole of the valve seat 11, so that the safety valve achieves better sealing performance and resetting performance.
The high-pressure safety valve further comprises a valve rod 16, a spring 19 and a spring 19 seat, wherein the valve rod 16 is arranged in the valve cover 13, one end of the valve rod 16 penetrates through the valve cover 13 and extends into the valve cover 14, and the other end of the valve rod 16 penetrates through the valve cover 13 and is connected with the valve clack 15; the spring 19 is sleeved on the valve rod 16, and two ends of the spring 19 are connected with the spring 19 seat.
Further, a connecting portion 161 is provided at one end of the valve stem 16 for connecting with the valve clack 15, a clamping groove is provided on the connecting portion 161, a groove capable of accommodating the connecting portion 161 therein is provided at one end of the valve clack 15, and a buckle capable of being clamped in the clamping groove is provided at the outer edge of the groove.
The high-pressure safety valve further comprises a guide sleeve 17, the guide sleeve 17 is sleeved on the outer wall of the valve clack 15, and a graphite gasket 18 is arranged between the guide sleeve 17 and the valve body 12 and/or between the guide sleeve 17 and the valve cover 13. Preferably, the graphite gasket 18 is a flexible graphite gasket 18, and compared with the metal gasket 18 of a conventional valve, the flexible graphite gasket 18 reduces the coefficient and the sealing specific pressure of the gasket 18, so that the requirement on the pressing force of a sealing surface can be reduced.
As a preferred embodiment, the sealing structure 21 is an O-ring, namely, the valve cover 13 and the valve cap 14 are sealed by adopting the O-ring, compared with the gasket 18 of a conventional valve, the coefficient of the gasket 18 and the specific sealing pressure are reduced, and the pressing force on a sealing surface can be reduced, so that the performance requirements of materials of the valve cover 13 and the valve cap 14 are reduced.
Working principle: the inlet of the valve seat 11 is connected with an air compressor pipeline, air medium enters from the inlet of the valve seat 11, when the pressure of the medium at the inlet side of the safety valve is at normal working pressure, the upward thrust of the medium on the sealing surface of the valve clack 15 is smaller than the compression force of the downward spring 19 on the upper part of the valve clack 15, the valve seat 11 and the valve clack 15 are tightly attached to enable the valve to be in a normal sealing state, when the pressure of the medium rises to reach the set setting pressure, the thrust is larger than the compression force of the spring 19, the valve clack 15 is lifted upwards, the medium is discharged upwards from the guide notch of the valve clack 15, and the pressure of the medium continuously discharged from the inlet end of the valve is continuously reduced to return to the normal working pressure, at the moment, the force of the spring 19 is larger than the thrust, and the valve clack 15 moves downwards to the seat.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. A high pressure relief valve, characterized by: comprising the following steps:
a valve seat having a convex portion;
a valve body provided on the valve seat;
the valve cover is connected with the valve body, and a graphite gasket is arranged between the valve cover and the valve body;
and the valve bonnet is connected with the valve cover, and a sealing structure is arranged between the valve bonnet and the valve cover.
2. A high pressure relief valve as claimed in claim 1, wherein: the valve seat further comprises a valve clack, wherein the valve clack is arranged on the convex part of the valve seat.
3. A high pressure relief valve as claimed in claim 2, wherein: the bottom of the valve clack is provided with a conical sealing part.
4. A high pressure relief valve as claimed in claim 2, wherein: the valve rod is arranged in the valve cover, one end of the valve rod penetrates through the valve cover and extends into the valve cover, and the other end of the valve rod penetrates through the valve cover and is connected with the valve clack.
5. A high pressure relief valve as claimed in claim 4, wherein: the valve rod is used for connecting the one end of valve clack is provided with connecting portion, be provided with the draw-in groove on the connecting portion, the one end of valve clack has can hold connecting portion in its recess, the outer fringe of recess is provided with can the card and is located the buckle in the draw-in groove.
6. A high pressure relief valve as claimed in claim 2, wherein: the valve clack also comprises a guide sleeve, wherein the guide sleeve is sleeved on the outer wall of the valve clack.
7. A high pressure relief valve as defined in claim 6, wherein: graphite gaskets are arranged between the guide sleeve and the valve body and/or between the guide sleeve and the valve cover.
8. A high pressure relief valve according to claim 1 or 7, characterized in that: the graphite gasket is a flexible graphite gasket.
9. A high pressure relief valve as claimed in claim 4, wherein: the valve rod is characterized by further comprising a spring and a spring seat, wherein the spring is sleeved on the valve rod, and two ends of the spring are connected with the spring seat.
10. A high pressure relief valve as claimed in claim 1, wherein: the sealing structure is an O-shaped ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211650944.4A CN116025749A (en) | 2022-12-21 | 2022-12-21 | High-pressure safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211650944.4A CN116025749A (en) | 2022-12-21 | 2022-12-21 | High-pressure safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116025749A true CN116025749A (en) | 2023-04-28 |
Family
ID=86090464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211650944.4A Pending CN116025749A (en) | 2022-12-21 | 2022-12-21 | High-pressure safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116025749A (en) |
-
2022
- 2022-12-21 CN CN202211650944.4A patent/CN116025749A/en active Pending
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