CN221195564U - Integrated valve for wellhead installation control system - Google Patents

Abstract

The application discloses an integrated valve for a wellhead installation control system, which comprises a valve body, a one-way valve mechanism, a valve core mechanism and an overflow valve mechanism; the valve body is provided with a main runner and a discharge runner which are communicated; the side wall of the valve body is provided with an inlet, an outlet and a discharge port, the inlet and the outlet are both communicated with the main runner, and the discharge port is communicated with the discharge runner; the valve body is provided with an end cover which is positioned at one end of the main runner far away from the inlet, and the end cover is provided with a guide port; the one-way valve mechanism is fixedly arranged in the main flow channel to communicate or block the inlet and the outlet; the valve core mechanism is positioned at one end of the main flow channel close to the outlet so as to be communicated with the inlet and the outlet or communicated with the outlet and the discharge port; the overflow valve mechanism is used for communicating or blocking the outlet and the discharge. The application has the advantages of improving the safety performance of the wellhead safety control system, improving the construction efficiency and reducing the installation space.

Description

Integrated valve for wellhead installation control system

Technical Field

The application relates to the field of hydraulic equipment, in particular to an integrated valve for a wellhead installation control system.

Background

The wellhead installation control system can monitor wellhead pressure and feed real-time information back to the SCADA system, display is carried out on human-computer interfaces of the station control room and the central control room, the wellhead real-time information participates in shutdown logic of the SCADA system, and when the wellhead closing requirement is met, a wellhead safety valve and a ground safety valve can be automatically and remotely closed, so that the safety of a wellhead is ensured. The wellhead control valve is a main part for controlling the opening and closing of the wellhead safety valve and the ground safety valve, and has the function of controlling the pressure and flow of the wellhead, and automatically opening and releasing the pressure when the wellhead pressure exceeds a certain value so as to protect the safety of wellhead equipment and underground personnel.

The prior art of the industry is to install a one-way valve, a three-position two-way reversing valve and an overflow valve in a wellhead installation control system, and then use a pipe fitting to connect the two-way reversing valve and the overflow valve to realize a high-pressure control effect. When the pipe fittings are connected with each other between the valve bodies, sealing pipe fitting parts can have sealing positions, the sealing positions have the possibility of leakage, and each time one pipe fitting is connected, the wellhead safety control system can be used for counting leakage points of the sealing pipe fitting parts, the sealing positions are relatively larger, the safety of the wellhead installation control system is reduced, and the installation space required for installing a plurality of valve bodies is large.

In view of the above-mentioned related art means, there are drawbacks in that the installation space required for the connection of multiple valve bodies is large and the safety performance is low.

Disclosure of utility model

The embodiment of the application provides an integrated valve for a wellhead installation control system, which can integrate functions of a one-way valve, a three-position two-way reversing valve and an overflow valve, improves safety performance of the wellhead safety control system, improves construction efficiency and reduces installation space.

The application provides an integrated valve for a wellhead installation control system, which adopts the following technical scheme:

an integrated valve for a wellhead installation control system, comprising:

The valve body is provided with a main runner and a discharge runner, and the main runner is communicated with the discharge runner; the side wall of the valve body is provided with an inlet, an outlet and a discharge port, the inlet and the outlet are communicated with the main runner, and the discharge port is communicated with the discharge runner; the valve body is provided with an end cover, the end cover is positioned at one end of the main flow channel far away from the inlet, and the end cover is provided with a guiding port;

The one-way valve mechanism is fixedly arranged in the main flow channel and comprises a one-way valve seat and a first sealing component, the one-way valve seat is arranged at one end of the main flow channel close to the inlet and is sealed with the peripheral wall of the main flow channel, and the first sealing component is arranged in the main flow channel and is positioned between the inlet and the outlet so as to be communicated with or block the inlet and the outlet;

The valve core mechanism is positioned at one end of the main flow channel close to the outlet so as to communicate the inlet with the outlet or communicate the outlet with the discharge port;

The overflow valve mechanism is communicated with the discharge flow channel and comprises an overflow valve seat and a second sealing assembly, the overflow valve seat is fixedly and hermetically arranged on the valve body, and the second sealing assembly is arranged at one end of the overflow valve seat so as to be communicated with or block the outlet from being communicated with the discharge port.

Optionally, the one-way valve seat is provided with a first flow passage, and the first flow passage is communicated with the inlet; the first sealing assembly comprises a mounting seat, a first rolling ball and a first elastic piece, wherein the mounting seat is provided with a second flow passage communicated with the first flow passage, the first rolling ball and the first elastic piece are positioned at one end of the second flow passage, one end of the first elastic piece is connected with the first rolling ball, the other end of the first elastic piece is connected with the mounting seat, and the first rolling ball is positioned between the first flow passage and the first elastic piece and shields an opening of the first flow passage.

Optionally, the first seal assembly further includes a second ball and a second elastic element, the second ball and the second elastic element are located at one end of the second flow channel away from the unidirectional valve seat, one end of the second elastic element is connected with the second ball, the other end of the second elastic element is connected with the mounting seat, the second ball is located between the second flow channel opening and the valve core mechanism, and the second elastic element drives the second ball to move along the direction of the second flow channel.

Optionally, the valve core mechanism includes a core body, a shaft sleeve and a first pushing component, the length direction of the shaft sleeve is the same as that of the main runner, the shaft sleeve is communicated with the outlet, the shaft sleeve is fixed and mounted on the peripheral wall of the main runner in a sealing manner, and the second rolling ball shields the port of the shaft sleeve facing the mounting seat; the core body is arranged on the shaft sleeve and is in sliding fit with the shaft sleeve; the first pushing component is located at one end of the core body, which is far away from the second rolling ball, and drives the core body to move so as to press the second rolling ball to compress the second elastic piece to leave one end of the shaft sleeve to be communicated with the second flow channel and the outlet.

Optionally, a limiting gland is arranged at one end of the shaft sleeve, which is far away from the second rolling ball, and is arranged at the port of the shaft sleeve, and the limiting gland is provided with a through hole and a containing cavity; the periphery wall of the core body is provided with a baffle plate, the core body penetrates through the through hole, and the baffle plate is positioned in the accommodating cavity and moves back and forth along with the core body.

Optionally, the first pushing component includes a pilot piston, a piston connecting rod, a third elastic member and a fourth elastic member, where the pilot piston is installed in the end cover and slidingly engaged with the end cover, the piston connecting rod is located in the main flow channel and is sealed with the main flow channel and slidingly engaged with the main flow channel, the third elastic member is located between the shaft sleeve and the piston connecting rod, one end of the third elastic member is connected with the shaft sleeve, and the other end of the third elastic member is connected with the piston connecting rod; the fourth elastic piece is located between the valve body and the pilot piston, one end of the fourth elastic piece is connected with the valve body, and the other end of the fourth elastic piece is connected with the pilot piston.

Optionally, the one end that the piston connecting rod is close to the core is provided with the filler, be provided with the third runner in the core, the third runner with second runner and discharge runner intercommunication, the guide piston drive the piston connecting rod orientation the core moves so that the guide piston supports when pressing the core the filler shelters from the third runner with the shutoff third runner with discharge runner.

Optionally, the second sealing element comprises a sealing element and a sealing element, the sealing element is provided with a fourth flow passage communicated with the discharge flow passage, and the sealing element is arranged on the peripheral wall of the fourth flow passage; the overflow valve mechanism further comprises a second pushing assembly, a valve rod is arranged in the overflow valve seat and is in sliding fit with the overflow valve seat, the second pushing assembly is located at one end, away from the second sealing element, of the valve rod, the other end of the valve rod is located in the fourth flow channel, and the second pushing assembly drives the valve rod to move so that the sealing element covers the valve rod to block the fourth flow channel or the sealing element is separated from the valve rod to be communicated with the fourth flow channel and the discharge flow channel.

Optionally, the second pushing component includes a fifth elastic element, a pressing pad and a limiting block, where the limiting block is located at one end of the overflow gland and is fixedly connected with the overflow gland, and the limiting block is provided with a flow hole, and the flow hole is communicated with the fourth flow channel; the overflow valve seat is internally provided with an installation cavity, the fifth elastic piece and the pressing pad are positioned in the installation cavity, one end of the fifth elastic piece is connected with the inner wall of the installation cavity, the other end of the fifth elastic piece is connected with the pressing pad, the end face, away from the fifth elastic piece, of the pressing pad is contacted with the valve rod and is pressed against, and one end, away from the pressing pad, of the valve rod is contacted with the end face of the limiting block and is pressed against.

Optionally, the valve body is provided with a plug, the plug is located at two ends of the discharge flow channel, the cross section of the plug shields the cross section of the discharge flow channel, and the plug is sealed with the valve body.

From the above technical solutions, the embodiment of the present application has the following advantages:

The integrated valve integrates the functions of the one-way valve, the three-position two-way reversing valve and the overflow valve into one valve body, and only the integrated valve is required to be independently installed when hydraulic equipment is installed; meanwhile, the installation space of the integrated valve can be effectively reduced during installation, the construction efficiency is improved, and the product cost is greatly reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an integrated valve for a wellhead installation control system according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of an integrated valve for a wellhead installation control system according to an embodiment of the present application;

Fig. 3 is a partial enlarged view at a in fig. 2.

Reference numerals illustrate:

1.A valve body; 11. a main flow passage; 12. a discharge flow path; 13. an inlet; 14. an outlet; 15. a discharge port; 16. an end cap; 161. a leading port; 17. a plug;

2. A one-way valve mechanism; 21. a one-way valve seat; 211. a first flow passage; 212 a first arc surface; 22. a first seal assembly; 221. a mounting base; 2211. a second flow passage; 2212. a first mounting groove; 2213. a second mounting groove; 222. a first ball; 223. a first elastic member; 224. a second ball; 225. a second elastic member;

3. A valve core mechanism; 31. a core; 311. a baffle; 312. a third flow passage; 32. a shaft sleeve; 321. a first connection channel; 322. a second connection channel; 323. a second arc surface; 33. a limit gland; 331. a through hole; 332. a housing chamber; 34. a first pushing assembly; 341. a pilot piston; 342. a piston connecting rod; 3421. a filler; 343. a third elastic member; 344. a fourth elastic member;

4. An overflow valve mechanism; 41. an overflow valve seat; 411. a valve stem; 412. a mounting chamber; 42. a second seal assembly; 421. a relief gland; 4211. a fourth flow passage; 422. a seal; 43. a second pushing assembly; 431. a fifth elastic member; 432. a pressing pad; 433. a limiting block; 4331. and a flow hole.

Detailed Description

The application is described in further detail below with reference to fig. 1-3.

The embodiment of the application provides an integrated valve for a wellhead installation control system. Referring to fig. 1 and 2, an integrated valve for a wellhead installation control system according to an embodiment of the present application includes a valve body 1, a check valve mechanism 2, a valve core mechanism 3, and a relief valve mechanism 4.

The valve body 1 is provided with a main flow passage 11 and a discharge flow passage 12, both ends of the main flow passage 11 and the discharge flow passage 12 penetrate through the valve body 1, the main flow passage 11 is arranged along the axial direction of the valve body 1, and the main flow passage 11 and the discharge flow passage 12 are communicated. In this embodiment, the discharge flow channel 12 is in an "L" shape, the first connection end of the discharge flow channel 12 is parallel to the main flow channel 11, and the second connection end of the discharge flow channel 12 is perpendicular to the main flow channel 11. The side wall of the valve body 1 is provided with an inlet 13 for connecting high-pressure liquid, an outlet 14 for connecting high-pressure liquid and a discharge outlet 15, wherein the inlet 13 and the outlet 14 are both positioned in the main runner 11 and are communicated with the main runner 11, the discharge outlet 15 is positioned in the discharge runner 12 and is communicated with the discharge runner 12, the inlet 13 and the outlet 14 are positioned on the same side wall of the valve body 1, and the discharge outlet 15 is positioned on the other side wall of the valve body 1.

The valve body 1 is provided with end cover 16 and end cap 17, and end cover 16 is located the one end that inlet 13 was kept away from to sprue 11 and covers the one end that inlet 13 was kept away from to sprue 11, and end cover 16 passes through fastening bolt fixed connection on valve body 1, and end cover 16 is provided with the guide mouth 161 that is used for connecting low pressure liquid, and the axis of guide mouth 161 coincides with the axis of sprue 11. The plugs 17 are positioned at two ends of the discharge flow channel 12, the cross section of the plug 17 shields the cross section of the discharge flow channel 12, and the plug 17 is sealed with the valve body 1 to prevent liquid in the discharge flow channel 12 from flowing out of the valve body 1. In order to enhance the tightness between the plug 17 and the valve body 1, the valve body 1 is provided with a plug 17 mounting hole for mounting the plug 17, the plug 17 is positioned in the plug 17 mounting hole, and a sealing ring is arranged between the plug 17 and the inner wall of the plug 17 mounting hole so as to realize the sealing effect between the plug 17 and the valve body 1.

Under the cooperation of the one-way valve mechanism 2 and the valve core mechanism 3, the integrated valve controls the shutoff of high-pressure liquid at the inlet 13 and the outlet 14 through low-pressure liquid at the pilot port 161, so that the pressure stability at the inlet 13 side and the outlet 14 side is kept; when the high-pressure liquid is started, the high-pressure liquid overflows and is discharged into the discharge flow channel 12 through the overflow valve mechanism 4 when the pressure of the high-pressure liquid is too high, so that the pressure of the high-pressure liquid is reduced. The integrated valve integrates the one-way valve, the three-position two-way reversing valve and the overflow valve into one valve body 1, and when hydraulic equipment is installed, the three valves are not required to be connected by using a pipe fitting, so that the sealing position is greatly reduced, the leakage point of the sealing pipe fitting part is reduced, the leakage possibility is reduced, and the safety performance of a wellhead safety control system is improved; meanwhile, the installation space of the integrated valve can be effectively reduced during installation, the construction efficiency is improved, and the product cost is reduced.

Referring to fig. 2, the check valve mechanism 2 is fixedly installed in the main flow channel 11, and is located at one end of the main flow channel 11 near the inlet 13. The check valve mechanism 2 comprises a check valve seat 21 and a first sealing component 22, the check valve seat 21 is arranged at a port of the main flow channel 11, which is close to the inlet 13, the check valve seat 21 is fixed on the valve body 1 through a compression screw, the peripheral wall of the check valve seat 21 is sealed with the peripheral wall of the main flow channel 11, and a sealing ring is arranged between the peripheral wall of the check valve seat 21 and the peripheral wall of the main flow channel 11 to enhance the sealing effect. The first sealing assembly 22 is fixedly installed in the main runner 11, and the first sealing assembly 22 is located on one side of the one-way valve seat 21 away from the port of the main runner 11 and between the inlet 13 and the outlet 14 to communicate or block the inlet 13 and the outlet 14.

Specifically, the one-way valve seat 21 is provided with a first flow channel 211 for communicating with the inlet 13, the central axis of the first flow channel 211 coincides with the central axis of the main flow channel 11, and the opening end of the first flow channel 211 faces the first sealing assembly 22; the first sealing assembly 22 comprises a mounting seat 221, a first rolling ball 222 and a first elastic member 223, wherein the mounting seat 221 is provided with a second flow passage 2211 communicated with the first flow passage 211, the first rolling ball 222 and the first elastic member 223 are positioned at one end of the second flow passage 2211, one end of the first elastic member 223 is connected with the first rolling ball 222, the other end of the first elastic member 223 is connected with the mounting seat 221, and the first rolling ball 222 is positioned between the first flow passage 211 and the first elastic member 223 and shields the opening of the first flow passage 211. Further, the mounting seat 221 is provided with a first mounting groove 2212 for mounting the first ball 222 and the first elastic member 223, the opening of the first mounting groove 2212 faces the one-way valve seat 21, the first mounting groove 2212 is communicated with the second flow passage 2211, the diameter of the first mounting groove 2212 is slightly larger than that of the first ball 222, the first elastic member 223 is located in the first mounting groove 2212, the first elastic member 223 is fixedly connected with the bottom of the first mounting groove 2212, the other end of the first elastic member 223 is fixedly connected with the first ball 222, and the first ball 222 moves in the first mounting groove 2212 under the elastic action of the first elastic member 223. In other embodiments, the two ends of the first elastic member 223 are only in contact with or abut against each other with the first ball 222 and the bottom of the first mounting groove 2212, and are not fixedly connected. The first flow channel 211 is provided with a first arc surface 212 attached to the outer peripheral wall of the first ball 222, and the first ball 222 is attached to the first arc surface 212 to improve the tightness between the first ball 222 and the opening of the first flow channel 211.

The first sealing assembly 22 further comprises a second ball 224 and a second elastic member 225, wherein the second ball 224 and the second elastic member 225 are used for being in matched communication with the core 31 assembly and the inlet 13 and the outlet 14, the second ball 224 and the second elastic member 225 are positioned at one end of the second flow passage 2211 far away from the one-way valve seat 21, one end of the second elastic member 225 is connected with the second ball 224, the other end of the second elastic member 225 is connected with the mounting seat 221, the second ball 224 is positioned between the opening of the second flow passage 2211 and the valve core mechanism 3, and the second elastic member 225 drives the second ball 224 to move along the direction of the second flow passage 2211. Further, the mounting seat 221 is provided with a second mounting groove 2213 for mounting the second rolling ball 224 and the second elastic member 225, the opening of the second mounting groove 2213 faces the guiding opening 161, the second mounting groove 2213 is communicated with the second flow channel 2211, the diameter of the second mounting groove 2213 is slightly larger than that of the second rolling ball 224, the second elastic member 225 is located in the second mounting groove 2213, the second elastic member 225 is fixedly connected with the bottom of the second mounting groove 2213, the other end of the second elastic member 225 is fixedly connected with the second rolling ball 224, and the second rolling ball 224 moves in the second mounting groove 2213 under the elastic force of the second elastic member 225. In other embodiments, the two ends of the second elastic member 225 are only in contact with or abut against each other with the bottoms of the second ball 224 and the second mounting groove 2213, and are not fixedly connected. The first elastic member 223 and the second elastic member 225 are preferably springs.

Referring to fig. 2 and 3, the valve core mechanism 3 is located at one end of the main flow channel 11 near the outlet 14 to communicate the inlet 13 with the outlet 14 or communicate the outlet 14 with the exhaust port 15. The valve core mechanism 3 comprises a core 31, a shaft sleeve 32 and a first pushing component 34, wherein the shaft sleeve 32 is hollow cylindrical, the peripheral wall of the shaft sleeve 32 is fixedly and hermetically arranged on the peripheral wall of the main runner 11, the length direction of the shaft sleeve 32 is the same as that of the main runner 11, and the shaft sleeve 32 is communicated with the outlet 14. In the present embodiment, the sleeve 32 is provided with the first connection passage 321 that communicates the outlet 14 with the hollow structure of the sleeve 32, and the second flow passage 2211 communicates with the outlet 14 through the hollow structure of the sleeve 32 and the first connection passage 321. Sealing rings are arranged at two ends of the peripheral wall of the shaft sleeve 32, the first connecting channel 321 is located between the two sealing rings, and the sealing rings enhance the tightness between the peripheral wall of the shaft sleeve 32 and the peripheral wall of the main runner 11. The inner peripheral wall of the one end opening of the shaft sleeve 32 facing the mounting seat 221 is provided with a second arc surface 323 attached to the outer peripheral wall of the second rolling ball 224, the second rolling ball 224 is attached to the second arc surface 323 to shield the one end opening of the shaft sleeve 32 facing the mounting seat 221, and the second rolling ball 224 is attached to the second arc surface 323 to improve the tightness between the second rolling ball 224 and the one end opening of the shaft sleeve 32.

When the pilot port 161 is free from low pressure liquid, the inlet 13 flows into high pressure liquid, the high pressure liquid passes through the first flow passage 211 in the unidirectional valve seat 21, when the pressure acting force of the high pressure liquid in the first flow passage 211 on the first rolling ball 222 is larger than the compression force of the first elastic member 223, the first rolling ball 222 is separated from the first arc surface 212 of the unidirectional valve seat 21, the high pressure liquid flows into the second flow passage 2211 in the mounting seat 221, and the second rolling ball 224 and the second arc surface 323 of the shaft sleeve 32 are attached together, and under the action of the second elastic member 225 and the high pressure liquid, the second rolling ball 224 and the second arc surface 323 of the shaft sleeve 32 form a seal, so that the high pressure liquid cannot flow into the shaft sleeve 32.

The core 31 is generally cylindrical, the axis of the core 31 coincides with the axis of the shaft sleeve 32, the core 31 is installed in the shaft sleeve 32 and is in sliding fit with the shaft sleeve 32, a third flow passage 312 is arranged in the core 31, the third flow passage 312 is arranged along the length direction of the main flow passage 11, and the third flow passage 312 is communicated with the second flow passage 2211 and the discharge flow passage 12. In this embodiment, one end of the core 31 is located in the hollow structure of the shaft sleeve 32, the other end is located outside the shaft sleeve 32, a sealing ring is disposed between the outer peripheral wall of the core 31 and the inner peripheral wall of the shaft sleeve 32, the sealing ring is located at one side of the first connecting channel 321 away from the second rolling ball 224, and the sealing ring is used for enhancing the tightness between the core 31 and the shaft sleeve 32.

The end of the shaft sleeve 32 far away from the second rolling ball 224 is provided with a limit gland 33, and the limit gland 33 is fixedly arranged on the inner wall of the port of the shaft sleeve 32. The limiting gland 33 is provided with a through hole 331 and a containing cavity 332, the peripheral wall of the core 31 is provided with a baffle 311, the core 31 penetrates through the through hole 331, the baffle 311 is located in the containing cavity 332 and moves back and forth along with the core 31, and two opposite end faces of the containing cavity 332 along the direction of the main runner 11 limit the movement of the baffle 311 in the process of the back and forth movement of the core 31, so that the travel distance of the core 31 is limited.

The first pushing component 34 is located at an end of the core 31 away from the second ball 224, and the first pushing component 34 drives the core 31 to move to press the second ball 224 to compress the second elastic member 225 away from the second arc surface 323 of the shaft sleeve 32, so as to communicate the second flow passage 2211 with the outlet 14. Specifically, the first pushing unit 34 includes a pilot piston 341, a piston rod 342, a third elastic member 343, and a fourth elastic member 344, the pilot piston 341 is mounted in the end cover 16, the peripheral wall of the pilot piston 341 contacts the inner wall of the end cover 16, the pilot piston 341 is slidably engaged with the end cover 16, and when the pilot port 161 is in the presence of low-pressure liquid, a hydraulic force is generated on the pilot piston 341 to move the pilot piston 341 toward the core 31. A seal ring for enhancing the sealing effect between the pilot piston 341 and the end cap 16 is provided between the peripheral wall of the pilot piston 341 and the inner wall of the end cap 16. The piston connecting rod 342 transmits the pressure acting force received by the pilot piston 341 to the core 31, the piston connecting rod 342 is located in the main runner 11 and is in sealing and sliding fit with the main runner 11, a sealing ring for enhancing the sealing performance is arranged between the outer peripheral wall of the piston connecting rod 342 and the inner wall of the main runner 11, and a travel distance for the piston connecting rod 342 to move is arranged between the piston connecting rod 342 and the core 31. The third elastic member 343 is disposed between the sleeve 32 and the piston rod 342, and one end of the third elastic member 343 is connected to the sleeve 32 and the other end is connected to the piston rod 342. The fourth elastic member 344 is located between the valve body 1 and the pilot piston 341, and one end of the fourth elastic member 344 is connected to the valve body 1 and the other end is connected to the pilot piston 341. In this embodiment, the third elastic member 343 and the fourth elastic member 344 are preferably springs, and the valve body 1 is provided with a mounting hole for mounting the fourth elastic member 344, and one end of the fourth elastic member 344 is located in the mounting hole and the other end is located outside the mounting hole.

Further, a connection point between the discharge flow channel 12 and the main flow channel 11 is located between the core 31 and the piston connecting rod 342, and a filler 3421 for shielding the third flow channel 312 is arranged at one end of the piston connecting rod 342 close to the core 31; the force is applied to the pilot piston 341, the pilot piston 341 moves relative to the end cover 16 to compress the fourth elastic piece 344 so as to contact with the piston connecting rod 342 to drive the piston connecting rod 342 to move towards the core 31, the piston connecting rod 342 compresses the third elastic piece 343 to contact with and press against the core 31, and at the moment, the packing 3421 shields the third flow channel 312 to block the third flow channel 312 and the discharge flow channel 12, so that liquid is ensured not to enter the discharge flow channel 12; after the packing 3421 on one side of the piston rod 342 contacts the core 31 to form a seal, the core 31 is pushed to move towards the second ball 224, so that the core 31 presses the second ball 224 to compress the second elastic member 225 to release the seal between the second flow passage 2211 and the shaft sleeve 32.

Referring to fig. 2 and 3, the relief valve mechanism 4 is located at one side of the main flow passage 11 and communicates with the discharge flow passage 12, and the relief valve mechanism 4 includes a relief valve seat 41, a second seal assembly 42, and a second urging assembly 43. The overflow valve seat 41 is fixed and mounted on the valve body 1 in a sealing manner, in this embodiment, the valve body 1 is provided with a mounting hole for mounting the overflow valve seat 41, one end of the overflow valve seat 41 is located in the mounting hole and fixedly connected with the inner wall of the mounting hole, and a sealing ring for enhancing the sealing performance is arranged between the peripheral wall of the overflow valve seat 41 and the inner wall of the mounting hole. The overflow valve seat 41 is provided with a valve rod 411, the valve rod 411 is in sliding fit with the overflow valve seat 41, a sealing ring for enhancing sealing performance is arranged between the valve rod 411 and the overflow valve seat 41, and liquid in the discharge flow passage 12 is prevented from entering the overflow valve seat 41.

A second seal assembly 42 is mounted to one end of the relief valve seat 41 to communicate or block the outlet 14 from the drain 15. The second seal 422 comprises a gland 421 and a seal 422, the gland 421 providing a mounting basis for the seal 422 on the one hand and guiding the valve stem 411 when it is active on the other hand. The relief gland 421 is provided with a fourth flow passage 4211 communicating with the discharge flow passage 12, and the seal 422 is mounted to the peripheral wall of the fourth flow passage 4211. In this embodiment, the sleeve 32 is provided with a second connecting channel 322 that communicates the fourth flow channel 4211 with the hollow structure of the sleeve 32, the axis of the first connecting channel 321 coincides with the axis of the second connecting channel 322, the first connecting channel 321 communicates with the second connecting channel 322, and the fourth flow channel 4211 communicates with the hollow structure of the sleeve 32 through the second connecting channel 322 and then communicates with the outlet 14 through the first connecting channel 321. Seal 422 is preferably a gasket. One end of the valve stem 411 away from the relief valve seat 41 is located in the fourth flow passage 4211, and the peripheral wall of the valve stem 411 is in contact with and pressed against the inner wall of the seal 422. The second pushing assembly 43 pushes the valve rod 411 to move towards the sealing piece 422, and the end part of the valve rod 411 moves to the sealing piece 422, so that the sealing piece 422 covers the valve rod 411 to cover the fourth flow passage 4211 and block the connection between the fourth flow passage 4211 and the second connecting channel 322; when the end of the valve rod 411 is separated from the inner wall of the seal 422, the fourth flow path 4211 is unsealed, and the fourth flow path 4211 passes through the second connection passage 322 to communicate with the outlet 14.

The second pushing component 43 is located at one end of the valve rod 411 away from the second sealing element 422, the second pushing component 43 comprises a fifth elastic element 431, a pressing pad 432 and a limiting block 433, the limiting block 433 is located at one end of the overflow pressing cover 421 and is fixedly connected with the overflow pressing cover 421, the limiting block 433 is provided with a circulation hole 4331, and the circulation hole 4331 is communicated with the fourth flow channel 4211; the stopper 433 is provided with the sealing washer to the one end that is close to the relief gland 421, and the sealing washer cladding valve rod 411 tip, sealing washer and sealing member 422 coaction promote the leakproofness between valve rod 411 and the fourth runner 4211.

The overflow valve seat 41 is internally provided with an installation cavity 412, the fifth elastic member 431 and the pressing pad 432 are positioned in the installation cavity 412, the pressing pad 432 enables the compression force of the fifth elastic member 431 to be transmitted to the valve rod 411, one end of the fifth elastic member 431 is connected with the inner wall of the installation cavity 412, the other end of the fifth elastic member 431 is connected with the pressing pad 432, the end face, far away from the fifth elastic member 431, of the pressing pad 432 is in contact with and is abutted against the valve rod 411, and the end, far away from the pressing pad 432, of the valve rod 411 is in contact with and is abutted against the end face of the limiting block 433. In this embodiment, the fifth elastic member 431 is preferably a spring, the installation chamber 412 has an opening, the overflow valve seat 41 is provided with a spring gland 413 for shielding the opening of the installation chamber 412, the fifth elastic member 431 is pressed against the spring gland 413, the spring gland 413 is used for adjusting the compression amount of the fifth elastic member 431, thereby adjusting the compression force of the fifth elastic member 431, the spring gland 413 is connected with the overflow valve seat 41 through a lock nut, and after the compression force of the fifth elastic member 431 is adjusted, the spring gland is fixed by using the lock nut. When the fluid pressure is too high to overcome the compression force of the fifth elastic member 431, the overflow gland 421 is separated from the valve rod 411, the sealing member 422 is dislocated with the valve rod 411, the fourth flow passage 4211 is communicated with the second connecting passage 322, and the liquid enters the discharge flow passage 12 through the fourth flow passage 4211 and is discharged from the discharge port 15; when the fluid pressure is reduced by an insufficient amount to overcome the compression force of the fifth elastic member 431, the valve rod 411 moves toward the relief gland 421 under the elastic force of the return of the fifth elastic member 431 to return the valve rod 411 into contact with the seal 422 to form a seal again.

When the pilot port 161 is filled with low-pressure liquid, the inlet 13 flows into high-pressure liquid, the high-pressure liquid passes through the first flow passage 211 in the one-way valve seat 21, when the pressure acting force of the high-pressure liquid on the first rolling ball 222 is larger than the compression force of the first elastic piece 223, the first elastic piece 223 is compressed, the first rolling ball 222 is separated from the first arc surface 212 at the opening of the first flow passage 211, and the high-pressure liquid flows into the second flow passage 2211 in the mounting seat 221; meanwhile, low-pressure liquid flows in through the pilot port 161 to push the pilot piston 341 to compress the fourth elastic member 344, the pilot piston 341 overcomes the compression force of the fourth elastic member 344 to move towards the direction of the core body 31, the pilot piston 341 pushes the piston connecting rod 342 to enable the packing 3421 at the end part of the piston connecting rod 342 to be in contact with one end part of the core body 31, so that the third flow passage 312 is blocked to form a seal, after the seal is formed, the piston connecting rod 342 continues to push the core body 31, the core body 31 pushes the second rolling ball 224 open, so that the second rolling ball 224 moves towards the one-way valve seat 21 to compress the second elastic member 225 to enable the second rolling ball 224 to be separated from the second arc surface 323 at the end part of the shaft sleeve 32, high-pressure liquid enters between the shaft sleeve 32 and the core body 31 to enter the third flow passage 312, the packing 3421 at the end part of the core body 31 and the piston connecting rod 342 is blocked in a sealing manner, and the sealing member 422 and the valve rod 411 are matched to block the fourth flow passage 4211, and high-pressure liquid is prevented from entering the discharge flow passage 12. When the pressure of the high-pressure liquid is too high, the acting force of the high-pressure liquid pressure on the sealing position of the valve rod 411 and the sealing piece 422 is larger than the compression force of the fifth elastic piece 431, the valve rod 411 is separated from the sealing piece 422 on the overflow gland 421, the sealing piece 422 is in failure in sealing, the high-pressure liquid flows into the flow passage of the discharge port 15 through the fourth flow passage 4211, the pressure of the high-pressure liquid in the shaft sleeve 32 is reduced, after the pressure of the high-pressure liquid is reduced to a certain pressure, the compression force of the fifth elastic piece 431 is larger than the acting force of the high-pressure liquid pressure on the sealing position of the valve rod 411 and the sealing piece 422, the valve rod 411 moves to the sealing piece 422 along the fourth flow passage 4211, and the sealing piece 422 holds the valve rod 411 tightly for sealing again.

When the pressure of the inlet 13 side is lost, the pressure of the first ball 222 close to the first elastic member 223 is high, that is, the resultant force of the liquid pressure force and the compression force of the first elastic member 223 is greater than the pressure force of the inlet 13 side of the first ball 222, so that the first ball 222 is in contact sealing with the first arc surface 212 at the opening of the first flow passage 211 in the one-way valve seat 21 again, and the pressure of the outlet 14 side is ensured not to be reduced due to the pressure loss of the inlet 13 side.

When the pilot port loses pressure, the pilot piston 341 moves away from the valve core under the action of the fourth elastic piece 344, the sealing between the core 31 and the packing 3421 is separated under the action of the pressure of the outlet 14 side, the high-pressure liquid at the outlet 14 side pushes the piston connecting rod 342 through the third flow passage 312 so that the liquid flows into the flow passage of the discharge port 15 and flows out, and the pressure of the outlet 14 side is reduced to zero; and meanwhile, the second rolling ball 224 is reset under the action of the elastic force of the second elastic piece 225, and the second rolling ball 224 is in contact with the second arc surface 323 at the end part of the shaft sleeve 32 for resealing, so that the stable and non-descending side pressure of the inlet 13 is ensured.

The foregoing is not intended to limit the scope of the application in any way, and like reference numerals refer to like elements throughout the description, with the words "inner" and "outer" referring to directions toward and away from the geometric center of a particular element, respectively. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. An integrated valve for a wellhead installation control system, comprising:

A valve body (1), wherein the valve body (1) is provided with a main flow channel (11) and a discharge flow channel (12), and the main flow channel (11) is communicated with the discharge flow channel (12); the side wall of the valve body (1) is provided with an inlet (13), an outlet (14) and a discharge port (15), the inlet (13) and the outlet (14) are communicated with the main runner (11), and the discharge port (15) is communicated with the discharge runner (12); the valve body (1) is provided with an end cover (16), the end cover (16) is positioned at one end of the main flow channel (11) far away from the inlet (13), and the end cover (16) is provided with a pilot port (161);

The one-way valve mechanism (2), the one-way valve mechanism (2) is fixedly arranged in the main runner (11), the one-way valve mechanism (2) comprises a one-way valve seat (21) and a first sealing component (22), the one-way valve seat (21) is arranged at one end, close to the inlet (13), of the main runner (11) and is sealed with the peripheral wall of the main runner (11), and the first sealing component (22) is arranged in the main runner (11) and is positioned between the inlet (13) and the outlet (14) so as to be communicated with or block the inlet (13) and the outlet (14);

a valve core mechanism (3), wherein the valve core mechanism (3) is positioned at one end of the main flow channel (11) close to the outlet (14) so as to communicate the inlet (13) with the outlet (14) or communicate the outlet (14) with the discharge port (15);

The overflow valve mechanism (4), overflow valve mechanism (4) with discharge runner (12) intercommunication, overflow valve mechanism (4) include overflow disk seat (41) and second seal assembly (42), overflow disk seat (41) fixed and sealed install in valve body (1), second seal assembly (42) install in overflow disk seat (41) one end in order to communicate or to block export (14) with discharge port (15).

2. An integrated valve for a wellhead installation control system according to claim 1, characterized in that the one-way valve seat (21) is provided with a first flow passage (211), the first flow passage (211) being in communication with the inlet (13); the first sealing assembly (22) comprises a mounting seat (221), a first rolling ball (222) and a first elastic piece (223), the mounting seat (221) is provided with a second flow channel (2211) communicated with the first flow channel (211), the first rolling ball (222) and the first elastic piece (223) are located at one end of the second flow channel (2211), one end of the first elastic piece (223) is connected with the first rolling ball (222), the other end of the first elastic piece (223) is connected with the mounting seat (221), and the first rolling ball (222) is located between the first flow channel (211) and the first elastic piece (223) and shields an opening of the first flow channel (211).

3. The integrated valve for a wellhead installation control system according to claim 2, wherein the first sealing assembly (22) further comprises a second ball (224) and a second elastic member (225), the second ball (224) and the second elastic member (225) are located at one end of the second runner (2211) away from the one-way valve seat (21), one end of the second elastic member (225) is connected with the second ball (224), the other end of the second elastic member (225) is connected with the mounting seat (221), the second ball (224) is located between the opening of the second runner (2211) and the valve core mechanism (3), and the second elastic member (225) drives the second ball (224) to move along the direction of the second runner (2211).

4. An integrated valve for a wellhead installation control system according to claim 3, characterized in that the valve core mechanism (3) comprises a core body (31), a shaft sleeve (32) and a first pushing assembly (34), the length direction of the shaft sleeve (32) is the same as that of the main runner (11) and the shaft sleeve (32) is communicated with the outlet (14), the shaft sleeve (32) is fixedly and hermetically installed on the peripheral wall of the main runner (11), and the second rolling ball (224) shields the port of the shaft sleeve (32) facing the mounting seat (221); the core body (31) is arranged on the shaft sleeve (32) and is in sliding fit with the shaft sleeve (32); the first pushing component (34) is located at one end of the core body (31) far away from the second rolling ball (224), and the first pushing component (34) drives the core body (31) to move so as to press the second rolling ball (224) to compress one end of the second elastic piece (225) away from the shaft sleeve (32) to be communicated with the second flow passage (2211) and the outlet (14).

5. The integrated valve for a wellhead installation control system according to claim 4, characterized in that one end of the shaft sleeve (32) far away from the second rolling ball (224) is provided with a limit gland (33), the limit gland (33) is installed on a port of the shaft sleeve (32), and the limit gland (33) is provided with a through hole (331) and a containing cavity (332); the periphery wall of the core body (31) is provided with a baffle (311), the core body (31) penetrates through the through hole (331) and the baffle (311) is positioned in the accommodating cavity (332) to move back and forth along with the core body (31).

6. The integrated valve for a wellhead installation control system of claim 4 wherein the first push assembly (34) comprises a pilot piston (341), a piston rod (342), a third elastic member (343) and a fourth elastic member (344), the pilot piston (341) being mounted in the end cap (16) and slidingly engaged with the end cap (16), the piston rod (342) being located in the main flow passage (11) and being in sealing and slidingly engaged with the main flow passage (11), the third elastic member (343) being located between the sleeve (32) and the piston rod (342) and having one end connected to the sleeve (32) and the other end connected to the piston rod (342); the fourth elastic piece (344) is located between the valve body (1) and the pilot piston (341), one end of the fourth elastic piece (344) is connected with the valve body (1), and the other end of the fourth elastic piece is connected with the pilot piston (341).

7. The integrated valve for a wellhead installation control system according to claim 6, characterized in that a packing (3421) is provided at an end of the piston rod (342) close to the core (31), a third flow passage (312) is provided in the core (31), the third flow passage (312) is communicated with the second flow passage (2211) and the discharge flow passage (12), and the pilot piston (341) drives the piston rod (342) to move towards the core (31) so that the packing (3421) shields the third flow passage (312) when the pilot piston (341) abuts against the core (31) to block the third flow passage (312) and the discharge flow passage (12).

8. An integrated valve for a wellhead installation control system according to claim 1, characterized in that the second seal (422) comprises a gland (421) and a seal (422), the gland (421) being provided with a fourth flow passage (4211) communicating with the discharge flow passage (12), the seal (422) being mounted to the peripheral wall of the fourth flow passage (4211); the overflow valve mechanism (4) further comprises a second pushing assembly (43), a valve rod (411) is arranged in the overflow valve seat (41), the valve rod (411) is in sliding fit with the overflow valve seat (41), the second pushing assembly (43) is located at one end, far away from the second sealing element (422), of the valve rod (411), the other end of the valve rod (411) is located in the fourth flow channel (4211), and the second pushing assembly (43) drives the valve rod (411) to move so that the sealing element (422) covers the valve rod (411) to block the fourth flow channel (4211) or the sealing element (422) is separated from the valve rod (411) to be communicated with the fourth flow channel (4211) and the discharge flow channel (12).

9. The integrated valve for a wellhead installation control system according to claim 8, characterized in that the second pushing assembly (43) comprises a fifth elastic member (431), a pressure pad (432) and a stopper (433), the stopper (433) is located at one end of the overflow gland (421) and is fixedly connected with the overflow gland (421), the stopper (433) is provided with a flow hole (4331), and the flow hole (4331) is communicated with the fourth flow channel (4211); the overflow valve seat (41) is internally provided with an installation cavity (412), a fifth elastic piece (431) and a pressing pad (432) are positioned in the installation cavity (412), one end of the fifth elastic piece (431) is connected with the inner wall of the installation cavity (412), the other end of the fifth elastic piece is connected with the pressing pad (432), the pressing pad (432) is far away from the end face of the fifth elastic piece (431) and is in contact with and propped against the valve rod (411), and one end of the valve rod (411) far away from the pressing pad (432) is in contact with and propped against the end face of the limiting block (433).

10. The integrated valve for a wellhead installation control system according to claim 1, characterized in that the valve body (1) is provided with plugs (17), the plugs (17) are located at two ends of the discharge flow channel (12) and the cross section of the plugs (17) shields the cross section of the discharge flow channel (12), and the plugs (17) are sealed with the valve body (1).