Wellhead pressure reduction air regulating device

Abstract

The utility model belongs to wellhead throttling pressure reduction field especially, it is a kind of wellhead back pressure reduction air control device, it includes the pressure reducing valve body for wellhead back pressure reduction air control, the air inlet of pressure reducing valve body is fixedly installed with protection valve body, is equipped with protection mechanism on the protection valve body;The other end of the protection valve body is fixedly installed with buffer cavity, the other end of buffer cavity is fixedly installed with pressure reducing pipeline, the inside of pressure reducing pipeline is equipped with pressure reducing mechanism, the top of pressure reducing valve body is fixedly installed with fixed base, the outside of fixed base is slidably equipped with control head.The utility model can carry out pressure reduction to the high-pressure gas at wellhead, can effectively reduce the impact force of high-pressure gas, prevent its damage to pressure reducing valve, prolong the service life of pressure reducing valve, reduce the cost of equipment simultaneously with buffer cavity and protection mechanism.

Description

Technical Field

[0001] This utility model relates to the field of wellhead throttling and pressure reduction technology, and in particular to a wellhead backpressure throttling and gas-saving control device. Background Technology

[0002] Currently, in wellhead natural gas extraction both domestically and internationally, high-pressure natural gas is directly introduced into the pipeline network before being fed into the pipeline network due to its high pressure and impact force. This can easily cause pipeline damage and poses a great safety hazard. Therefore, pressure regulating valves are used to throttle and reduce the pressure.

[0003] Existing pressure reducing valves mostly regulate gas pressure by controlling the opening and closing of the valve body. However, pressure reducing valves mostly use diaphragms as sealing valve cores. Due to the large impact force of high-pressure natural gas, the diaphragm is easily damaged and worn by the gas impact, resulting in a short service life and high cost.

[0004] Therefore, we propose a wellhead backpressure reduction and gas-saving control device to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A wellhead backpressure throttling control device includes a pressure-reducing valve body for wellhead backpressure throttling control. A protective valve body is fixedly installed at the air inlet of the pressure-reducing valve body, and a protective mechanism is provided on the protective valve body. A buffer chamber is fixedly installed at the other end of the protective valve body, and a pressure-reducing pipe is fixedly installed at the other end of the buffer chamber. A pressure-reducing mechanism is provided on the inner side of the pressure-reducing pipe.

[0007] Specifically, a fixed base is fixedly installed on the top of the pressure reducing valve body, and a control head is slidably sleeved on the outer side of the fixed base.

[0008] Specifically, a pressure-reducing valve stem is fixedly installed on the inner side of the control head, and a threaded groove is opened on the outer side of the pressure-reducing valve stem. A threaded hole is opened on the top of the fixed base, and the pressure-reducing valve stem is threadedly connected to the threaded hole. A linkage column is fixedly installed at the bottom end of the pressure-reducing valve stem, and a valve core is fixedly installed at the bottom end of the linkage column. A stop plate is fixedly installed at the bottom of the stop plate, and a corrugated diaphragm is fixedly installed at the bottom. The valve core is fixedly inserted through the stop plate and the corrugated diaphragm. A range spring is fixedly installed at the top of the stop plate, and the range spring is slidably sleeved on the linkage column to facilitate the opening and closing of the pressure-reducing valve through the linkage column.

[0009] Specifically, the diameter of the outlet of the buffer chamber is larger than the diameter of the inlet, which facilitates the buffering of gas pressure.

[0010] Specifically, the protective mechanism includes two protective valve seats, a valve plate, a protective valve stem, and a drive assembly. Two protective valve seats are fixedly installed on the inner side of the protective valve body. A protective valve stem is rotatably installed on the top inner wall of the protective valve body. A valve plate is fixedly sleeved on the outer side of the protective valve stem. The valve plate is adapted to the two protective valve seats and rotates within the protective valve body. A drive assembly is provided on the protective valve stem.

[0011] Specifically, the drive assembly includes a worm gear, a worm, and a knob. A worm is rotatably mounted on the inner wall of one side of the protective valve body. A worm gear is fixedly sleeved on the protective valve stem. The worm gear meshes with the worm. A knob is rotatably mounted on one side of the protective valve body. The knob is fixedly connected to the worm.

[0012] Specifically, the pressure-reducing mechanism includes a first buffer plate, a second buffer plate, and a third buffer plate. The first buffer plate, the second buffer plate, and the third buffer plate are fixedly installed on the inner side of the pressure-reducing pipe. The first buffer plate, the second buffer plate, and the third buffer plate have buffer holes of different sizes evenly opened on one side in different patterns to facilitate the buffering of high-pressure gas.

[0013] Specifically, a flange is fixedly fitted on the outside of the pressure-reducing pipe to facilitate connection with the gas outlet pipe at the wellhead.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a pressure-reducing mechanism, the high-pressure gas at the wellhead can be reduced. At the same time, in conjunction with the buffer chamber and protective mechanism, the impact force of the high-pressure gas can be effectively reduced, preventing it from damaging the pressure-reducing valve, extending the service life of the pressure-reducing valve, and reducing the cost of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a wellhead backpressure throttling and regulating device proposed in this utility model;

[0016] Figure 2 This is a three-dimensional structural breakdown diagram of a wellhead backpressure throttling and regulating device proposed in this utility model;

[0017] Figure 3 This is a three-dimensional cross-sectional view of the protective mechanism of a wellhead backpressure throttling control device proposed in this utility model;

[0018] Figure 4 This is a three-dimensional structural disassembly diagram of the protective mechanism of a wellhead backpressure throttling control device proposed in this utility model.

[0019] Figure 5 This is a three-dimensional structural breakdown diagram of the pressure-reducing mechanism of a wellhead backpressure throttling control device proposed in this utility model.

[0020] In the diagram: 1. Pressure reducing valve body; 2. Control head; 3. Pressure reducing valve stem; 4. Fixed base; 5. Linkage column; 6. Range spring; 7. Valve core; 8. Stop plate; 9. Corrugated diaphragm; 10. Protective valve body; 11. Protective valve seat; 12. Valve plate; 13. Protective valve stem; 14. Worm gear; 15. Worm; 16. Knob; 17. Buffer chamber; 18. Pressure reducing pipeline; 19. Flange; 20. First buffer plate; 21. Second buffer plate; 22. Third buffer plate. Detailed Implementation

[0021] Reference Figure 1-5 A wellhead backpressure throttling control device includes a pressure reducing valve body 1 for wellhead backpressure throttling control, a protective valve body 10 fixedly installed at the air inlet of the pressure reducing valve body 1, and a protective mechanism provided on the protective valve body 10; a buffer chamber 17 fixedly installed at the other end of the protective valve body 10, a pressure reducing pipe 18 fixedly installed at the other end of the buffer chamber 17, and a pressure reducing mechanism provided on the inner side of the pressure reducing pipe 18.

[0022] In this embodiment, a fixed base 4 is fixedly installed on the top of the pressure reducing valve body 1, and a control head 2 is slidably sleeved on the outer side of the fixed base 4.

[0023] In this embodiment, a pressure-reducing valve stem 3 is fixedly installed on the inner side of the control head 2. A threaded groove is opened on the outer side of the pressure-reducing valve stem 3. A threaded hole is opened on the top of the fixed base 4. The pressure-reducing valve stem 3 is threadedly connected to the threaded hole. A linkage column 5 is fixedly installed at the bottom end of the pressure-reducing valve stem 3. A valve core 7 is fixedly installed at the bottom end of the linkage column 5. A stop plate 8 is fixedly installed at the bottom end of the linkage column 5. A corrugated diaphragm 9 is fixedly installed at the bottom of the stop plate 8. The valve core 7 is fixedly inserted through the stop plate 8 and the corrugated diaphragm 9. A range spring 6 is fixedly installed at the top of the stop plate 8. The range spring 6 is slidably sleeved on the linkage column 5, so as to facilitate the opening and closing of the pressure-reducing valve through the linkage column 5.

[0024] In this embodiment, the diameter of the air outlet of the buffer chamber 17 is larger than the diameter of the air inlet, which facilitates the buffering of gas pressure.

[0025] In this embodiment, the protective mechanism includes two protective valve seats 11, a valve plate 12, a protective valve stem 13, and a drive assembly. Two protective valve seats 11 are fixedly installed on the inner side of the protective valve body 10. A protective valve stem 13 is rotatably installed on the top inner wall of the protective valve body 10. A valve plate 12 is fixedly sleeved on the outer side of the protective valve stem 13. The valve plate 12 is adapted to the two protective valve seats 11 and rotates within the protective valve body 10. A drive assembly is provided on the protective valve stem 13.

[0026] In this embodiment, the drive assembly includes a worm gear 14, a worm 15, and a knob 16. The worm 15 is rotatably mounted on the inner wall of one side of the protective valve body 10. The worm gear 14 is fixedly sleeved on the protective valve stem 13. The worm gear 14 meshes with the worm 15. The knob 16 is rotatably mounted on one side of the protective valve body 10. The knob 16 is fixedly connected to the worm 15.

[0027] In this embodiment, the pressure reduction mechanism includes a first buffer plate 20, a second buffer plate 21, and a third buffer plate 22. The first buffer plate 20, the second buffer plate 21, and the third buffer plate 22 are fixedly installed on the inner side of the pressure reduction pipe 18. The first buffer plate 20, the second buffer plate 21, and the third buffer plate 22 have buffer holes of different sizes evenly opened on one side in different patterns, which facilitates the buffering of high-pressure gas.

[0028] In this embodiment, a flange 19 is fixedly fitted on the outside of the pressure-reducing pipe 18 to facilitate connection with the gas outlet pipe at the wellhead.

[0029] Working Principle: During operation, after connecting the equipment to the wellhead's outlet pipe via flange 19, the equipment is started. High-pressure gas first enters the pressure-reducing pipe 18, passing through the first buffer plate 20, the second buffer plate 21, and the third buffer plate 22. The high-pressure gas first impacts the first buffer plate 20, with some gas passing through the buffer holes on the first buffer plate 20 and reaching between the first and second buffer plates 21. It then impacts the second buffer plate 21, and the process repeats before impacting the third buffer plate 22. After being blocked by the three buffer plates, the impact force of the high-pressure gas is reduced, and it then enters the buffer chamber 17. When the high-pressure gas enters the buffer chamber 17, the sudden increase in space increases the gas flow rate. The pressure is reduced, buffered, and stabilized. Then, the operator turns knob 16 to open the protective valve according to the gas pressure. The rotation of knob 16 drives worm gear 15 to rotate, which in turn drives worm wheel 14 to rotate. Worm wheel 14 drives protective valve stem 13 to rotate, thereby opening valve plate 12. After the high-pressure gas hits valve plate 12, the impact force is relieved for the last time. At this time, the impact force of the high-pressure gas is greatly reduced and enters the pressure reducing valve body 1. The operator turns control head 2, which drives pressure reducing valve stem 3 to rotate. The rotation of pressure reducing valve stem 3 drives linkage column 5 and valve core 7 to move upward, thereby opening the valve by stop plate 8 and corrugated diaphragm 9. After the gas passes through the pressure reducing valve body, it no longer has a strong impact force and can now be delivered into the pipeline network.

[0030] The technological advancements achieved by this invention compared to existing technologies are: it can reduce the pressure of high-pressure gas at the wellhead, and in conjunction with the buffer chamber 17 and the protective valve, it can effectively reduce the impact force of high-pressure gas, prevent damage to the pressure-reducing valve, extend the service life of the pressure-reducing valve, and reduce the cost of the equipment.

Claims

1. A wellhead backpressure reducing and gas-saving control device, characterized in that, It includes a pressure-reducing valve body (1) for regulating the back pressure at the wellhead, and a protective valve body (10) is fixedly installed at the air inlet of the pressure-reducing valve body (1), and a protective mechanism is provided on the protective valve body (10); A buffer chamber (17) is fixedly installed at the other end of the protective valve body (10), and a pressure reducing pipe (18) is fixedly installed at the other end of the buffer chamber (17). A pressure reducing mechanism is provided on the inner side of the pressure reducing pipe (18).

2. The wellhead backpressure reducing and gas-saving control device according to claim 1, characterized in that, A fixed base (4) is fixedly installed on the top of the pressure reducing valve body (1), and a control head (2) is slidably sleeved on the outer side of the fixed base (4).

3. The wellhead backpressure reducing and gas-saving control device according to claim 2, characterized in that, A pressure-reducing valve stem (3) is fixedly installed on the inner side of the control head (2). A threaded groove is opened on the outer side of the pressure-reducing valve stem (3). A threaded hole is opened on the top of the fixed base (4). The pressure-reducing valve stem (3) is threadedly connected to the threaded hole. A linkage column (5) is fixedly installed at the bottom end of the pressure-reducing valve stem (3). A valve core (7) is fixedly installed at the bottom end of the linkage column (5). A stop plate (8) is fixedly installed at the bottom end of the linkage column (5). A corrugated diaphragm (9) is fixedly installed at the bottom of the stop plate (8). The valve core (7) is fixedly inserted through the stop plate (8) and the corrugated diaphragm (9). A range spring (6) is fixedly installed at the top of the stop plate (8). The range spring (6) is slidably sleeved on the linkage column (5).

4. The wellhead backpressure reducing and gas-saving control device according to claim 1, characterized in that, The diameter of the air outlet of the buffer chamber (17) is larger than the diameter of the air inlet.

5. The wellhead backpressure reducing and gas-saving control device according to claim 1, characterized in that, The protective mechanism includes two protective valve seats (11), a valve plate (12), a protective valve stem (13), and a drive assembly. Two protective valve seats (11) are fixedly installed on the inner side of the protective valve body (10). A protective valve stem (13) is rotatably installed on the top inner wall of the protective valve body (10). A valve plate (12) is fixedly sleeved on the outer side of the protective valve stem (13). The valve plate (12) is adapted to the two protective valve seats (11). The valve plate (12) rotates within the protective valve body (10). A drive assembly is provided on the protective valve stem (13).

6. The wellhead backpressure reducing and gas-saving control device according to claim 5, characterized in that, The drive assembly includes a worm gear (14), a worm (15), and a knob (16). The worm (15) is rotatably mounted on the inner wall of one side of the protective valve body (10). The worm gear (14) is fixedly sleeved on the protective valve stem (13). The worm gear (14) meshes with the worm (15). The knob (16) is rotatably mounted on one side of the protective valve body (10). The knob (16) is fixedly connected to the worm (15).

7. The wellhead backpressure reducing and gas-saving control device according to claim 1, characterized in that, The pressure reducing mechanism includes a first buffer plate (20), a second buffer plate (21), and a third buffer plate (22). The first buffer plate (20), the second buffer plate (21), and the third buffer plate (22) are fixedly installed on the inner side of the pressure reducing pipe (18). The first buffer plate (20), the second buffer plate (21), and the third buffer plate (22) have buffer holes of different sizes evenly opened on one side in different patterns.

8. The wellhead backpressure reducing and gas-saving control device according to claim 1, characterized in that, A flange (19) is fixedly fitted on the outside of the pressure-reducing pipe (18).

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