CN220204774U - Pilot valve of pilot type safety valve - Google Patents
Pilot valve of pilot type safety valve Download PDFInfo
- Publication number
- CN220204774U CN220204774U CN202320272663.3U CN202320272663U CN220204774U CN 220204774 U CN220204774 U CN 220204774U CN 202320272663 U CN202320272663 U CN 202320272663U CN 220204774 U CN220204774 U CN 220204774U
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- China
- Prior art keywords
- valve
- pilot
- pilot valve
- sealing ring
- stl
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- 238000007789 sealing Methods 0.000 claims abstract description 49
- 238000003466 welding Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 7
- 230000006837 decompression Effects 0.000 abstract description 4
- 238000005266 casting Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 11
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
The utility model discloses a pilot valve structure of various pilot type safety valves, which is mainly characterized in that: the pilot valve is actuated first, then the main valve. The valve is required to have stable and reliable performance, namely, the sealing reaches zero leakage, the tripping and closing actions are sensitive, and the performance of the safety valve reaches the standard requirement. The structural characteristics are as follows: the valve port casting die and the lower valve port form a dovetail groove (matched with the triangular sealing ring) and an annular groove, the triangular sealing ring is arranged in the dovetail groove, the valve clack is designed to be a boss overlaying STL to form a sealing surface, the overlaying STL sealing surface compresses the triangular sealing ring, the triangular sealing ring deforms to close the pilot valve, the sealing reaches zero leakage, and the tripping and closing actions are sensitive, so that the performance of the safety valve reaches the standard requirement. When the pilot valve is opened, the reverse seal overlaying STL sealing surface on the valve rod forms a seal with the upper valve port, so that gas passing through the air inlet damping hole is prevented from entering the cavity of the pilot valve, meanwhile, the gas in the upper cavity of the main valve is quickly decompressed through the exhaust hole, and the main valve body is opened for decompression, so that equipment is protected.
Description
Technical Field
The utility model relates to the technical field of valve correlation, in particular to a pilot valve of a pilot type safety valve.
Background
The pilot operated safety valve is a main safety protection device of a natural gas collection pipeline, and has the function of automatically opening and discharging the overpressure gas in the pipeline when the pressure of the pipeline abnormally reaches the set value of the safety valve, so as to avoid the safety accidents such as pipeline burst and the like caused by the continuous rising of the pressure of the pipeline. When the existing pilot valve is started at the jump, no air inlet seal exists, and the air exhaust of the upper cavity of the main valve is realized by the flow difference of the air inlet damping hole and the air outlet damping hole, so that the pressure of the valve back seat is generally lower.
Disclosure of Invention
Accordingly, in order to address the above-mentioned shortcomings, the present utility model herein provides a pilot operated relief valve pilot valve. The main characteristics of the pilot operated relief valve are: the pilot valve is actuated first, then the main valve. The valve is required to have stable and reliable performance, namely, the sealing reaches zero leakage, the tripping and closing actions are sensitive, and the performance of the safety valve reaches the standard requirement.
The utility model is realized by constructing a pilot type safety valve pilot valve, which is characterized in that; the lower valve port is positioned below the inner cavity of the guide valve body, the lower valve port is in butt joint with the valve rod, the guide valve cover and the middle body are fixed on the guide valve body through hexagonal bolts, the guide valve body is provided with a joint A and a joint B, a spring seat and an adjusting spring are arranged in the guide valve cover, and the upper end of the guide valve cover is provided with an end cover, a locking nut, a shield and an adjusting screw; the valve port casting die and the lower valve port form a dovetail groove (matched with a triangular sealing ring) and an annular groove, the triangular sealing ring is arranged in the dovetail groove, the valve clack is designed to form a boss overlaying STL into a sealing surface, the boss overlaying STL sealing surface compresses the triangular sealing ring, the triangular sealing ring deforms to close the pilot valve, the sealing reaches zero leakage, and the tripping and closing actions are sensitive, so that the performance of the safety valve reaches the standard requirement.
The pilot valve of the pilot type safety valve is characterized in that; when the pilot valve is opened, the reverse seal overlaying STL sealing surface on the valve rod forms a seal with the upper valve port, so that gas passing through the air inlet damping hole is prevented from entering the cavity of the pilot valve, meanwhile, the gas in the upper cavity of the main valve is quickly decompressed through the exhaust hole, and the main valve body is opened for decompression, so that equipment is protected.
The pilot valve of the pilot type safety valve is characterized in that; the valve rod is connected with the piston through a T-shaped groove, and the valve rod is convenient to install and replace.
The utility model has the following advantages: the utility model provides a pilot-operated safety valve guide valve structure, which is mainly characterized in that: the pilot valve is actuated first, then the main valve. The valve is required to have stable and reliable performance, namely, the sealing reaches zero leakage, the tripping and closing actions are sensitive, and the performance of the safety valve reaches the standard requirement. The structural characteristics are as follows: the valve port casting die and the lower valve port form a dovetail groove (matched with a triangular sealing ring) and an annular groove, the triangular sealing ring is arranged in the dovetail groove, the valve clack is designed to form a boss overlaying STL into a sealing surface, the boss overlaying STL sealing surface compresses the triangular sealing ring, the triangular sealing ring deforms to close the pilot valve, the sealing reaches zero leakage, and the tripping and closing actions are sensitive, so that the performance of the safety valve reaches the standard requirement. When the pilot valve is opened, the reverse seal overlaying STL sealing surface on the valve rod forms a seal with the upper valve port, so that gas passing through the air inlet damping hole is prevented from entering the cavity of the pilot valve, meanwhile, the gas in the upper cavity of the main valve is quickly decompressed through the exhaust hole, and the main valve body is opened for decompression, so that equipment is protected. The valve rod is connected with the piston through a T-shaped groove, and the installation and the replacement are convenient.
Drawings
FIG. 1 is a schematic view of the present utility model in a closed state;
FIG. 2 is a schematic view of the present utility model in an open state;
FIG. 3 is a schematic illustration of a valve port press;
FIG. 4 is a schematic view of the upper valve port and valve stem corresponding parts;
fig. 5 is a schematic diagram of an application connection of the present utility model.
Detailed Description
The following detailed description of the present utility model will provide clear and complete description of the technical solutions of the embodiments of the present utility model, with reference to fig. 1-5, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model provides a pilot operated safety valve pilot valve by improvement, which is characterized in that; comprises the following steps of; the valve comprises a valve guide body 1, a lower valve port 2, a valve rod 3, an upper valve port 4, an O-shaped ring 5, a connector A6, a connector pad 7, an O-shaped ring 8, a middle body 9, a piston 10, an O-shaped ring 11, a valve guide cover 12, a spring seat 13, an adjusting spring 14, an end cover 15, a locking nut 16, a shield 17, an adjusting screw 18, a hexagonal bolt 19, a connector B20, a lower valve port threaded sleeve 21 and a valve port pressing piece 22; the lower valve port 2 is positioned below the inner cavity of the valve guide body 1, the lower valve port 2 is in butt joint with the valve rod 3, the valve guide cover 12 and the middle body 9 are fixed on the valve guide body 1 through a hexagonal bolt 19, a joint 6 and a joint 20 are arranged on the valve guide body 1, a spring seat 13 and an adjusting spring 14 are arranged in the valve guide cover 12, and an end cover 15, a locking nut 16, a shield 17 and an adjusting screw 18 are arranged at the upper end of the valve guide cover 12; the valve port pressing piece 22 and the lower valve port 2 form a dovetail groove (matched with a triangular sealing ring) and an annular groove 25, the triangular sealing ring is arranged in the dovetail groove, the valve clack is designed to form a boss build-up welding STL into a sealing surface 26, the boss build-up welding STL sealing surface 26 presses the triangular sealing ring, the triangular sealing ring deforms to close the pilot valve, zero leakage is achieved in sealing, and the tripping and closing actions are sensitive, so that the performance of the safety valve reaches the standard requirement.
When the pilot valve of the pilot type safety valve is implemented; when the pilot valve is opened, the reverse seal 27 on the valve rod 3 is overlaid with the STL sealing surface to form a seal with the upper valve port 4, so that gas passing through the air inlet damping hole 29 is prevented from entering the pilot valve cavity 27, meanwhile, the gas in the upper cavity 31 of the main valve is quickly decompressed through the exhaust hole 23, and the main valve body 30 is opened to decompress, so that equipment is protected.
When the pilot valve of the pilot type safety valve is implemented; the valve rod 3 is connected with the piston 10 through a T-shaped groove, and the installation and the replacement are convenient.
The utility model provides a pilot-operated safety valve guide valve structure, which is mainly characterized in that: the pilot valve is actuated first, then the main valve. The valve is required to have stable and reliable performance, namely, the sealing reaches zero leakage, the tripping and closing actions are sensitive, and the performance of the safety valve reaches the standard requirement. The structural characteristics are as follows: the valve port pressing piece 22 and the lower valve port 2 form a dovetail groove (matched with a triangular sealing ring) and an annular groove 25, the triangular sealing ring is arranged in the dovetail groove, the valve clack is designed to be a boss overlaying STL to form a sealing surface, the overlaying STL sealing surface compresses the triangular sealing ring, the triangular sealing ring deforms to close the pilot valve, zero leakage is achieved by sealing, and the tripping and closing actions are sensitive, so that the performance of the safety valve reaches the standard requirement. When the pilot valve is opened, the reverse seal overlaying STL sealing surface on the valve rod 3 forms a seal with the upper valve port 4, so that the gas passing through the gas inlet damping hole 29 is prevented from entering the pilot valve cavity 27, meanwhile, the gas in the upper cavity 31 of the main valve is quickly decompressed through the gas exhaust hole 23, and the main valve body 30 is opened for decompression, so that equipment is protected. The valve rod 3 is connected with the piston through a 10T-shaped groove, and is convenient to install and replace.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A pilot operated relief valve pilot valve, characterized by; the lower valve port (2) is positioned below the inner cavity of the pilot valve body (1), the lower valve port (2) is in butt joint with the valve rod (3), the pilot valve cover (12) and the middle body (9) are fixed on the pilot valve body (1) through hexagonal bolts (19), a joint A (6) and a joint B (20) are arranged on the pilot valve body (1), a spring seat (13) and an adjusting spring (14) are arranged in the pilot valve cover (12), and an end cover (15), a locking nut (16), a shield (17) and an adjusting screw (18) are arranged at the upper end of the pilot valve cover (12); the valve port pressing piece (22) and the lower valve port (2) form a dovetail groove and an annular groove (25), a triangular sealing ring is arranged in the dovetail groove, the valve clack is designed to be a boss build-up welding STL to form a sealing surface (26), the boss build-up welding STL to form the sealing surface (26) presses the triangular sealing ring, and the triangular sealing ring deforms to close the pilot valve.
2. A pilot operated relief valve pilot valve as defined in claim 1, wherein; the valve rod (3) is connected with the piston (10) through a T-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320272663.3U CN220204774U (en) | 2023-02-21 | 2023-02-21 | Pilot valve of pilot type safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320272663.3U CN220204774U (en) | 2023-02-21 | 2023-02-21 | Pilot valve of pilot type safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220204774U true CN220204774U (en) | 2023-12-19 |
Family
ID=89155227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320272663.3U Active CN220204774U (en) | 2023-02-21 | 2023-02-21 | Pilot valve of pilot type safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220204774U (en) |
-
2023
- 2023-02-21 CN CN202320272663.3U patent/CN220204774U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |