A three-in-one switch regulating device for a natural gas well and a regulating method thereof

Abstract

The present invention proposes a three-in-one switch regulating device for a natural gas well, comprising: a housing, a valve body, a regulating cylinder, a valve core cylinder, a remote control actuating mechanism, a wellhead pressure sensor, and an external transmission pipeline pressure sensor; the housing is provided with an inlet flange and a detection interface, and both ends of the housing are provided with outlet flanges and an inner interface, the lower end of the valve body is a valve cylinder, and the side wall of the valve cylinder is provided with a side valve hole, and the valve cylinder is fixed in the inner interface; the regulating cylinder is fixedly connected to the constriction of the valve cylinder and extends into the valve cylinder, and a pressure regulating hole is provided on the side wall of the regulating cylinder; the outer side wall and the inner side wall of the valve core cylinder are respectively slidably sealed with the valve cylinder and the regulating cylinder, and the push-pull rod at the upper end of the valve core cylinder passes through the valve body and extends out of the valve body, and is transmission-connected with the remote control actuating mechanism; the detection probe of the wellhead pressure sensor is connected with the detection interface; the detection probe of the external transmission pipeline pressure sensor is connected with the inner end of the outlet flange. The present invention proposes a switch regulating method for a natural gas well, which is implemented by using a three-in-one switch regulating device for a natural gas well.

Description

Technical Field

[0001] The invention belongs to the technical field of natural gas well exploitation, and in particular relates to a three-in-one switch regulating device for a natural gas well and a regulating method thereof. Background Art

[0002] The functions of the wellhead control devices in most oil and gas producing countries in the world are basically the same, namely, the well opening and closing function, pressure regulation function, and safety protection function. The corresponding control objects are the production gate valve, needle valve, and wellhead cut-off valve. At present, some domestic gas-producing areas have carried out wireless remote control of well closing and opening, regulating process parameters, and wellhead safety protection devices. In particular, a large number of tests and applications have been carried out in the Sulige gas field in my country. The reason why the work of the high-pressure natural gas wellhead gate valve must be remotely controlled separately is that the production gate valve and the wellhead cut-off valve have only two states: fully open or fully closed, and cannot be used to adjust the pressure of the external transmission pipeline. The needle valve can adjust the pressure, but cannot be used to open and close the well. The cost of remotely controlling the three gate valves of the high-pressure natural gas well separately is high, the signals interfere with each other, and the operation is complicated. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a three-in-one switch adjustment device for a natural gas well and an adjustment method thereof, so as to overcome the above-mentioned problems or at least partially solve or alleviate the above-mentioned problems.

[0004] The present invention provides a three-in-one switch regulating device for a natural gas well, comprising:

[0005] A shell, wherein an inlet flange and a detection interface are arranged on the side wall of the shell, an outlet flange is arranged at one end of the shell, and an inner interface is arranged at the other end, the inlet flange, the detection interface, the outlet flange and the inner interface are internally connected, and a plug is connected to the detection interface;

[0006] The valve body is cylindrical, the lower end of which is a valve cylinder, and the upper end is provided with a sealing sliding hole, a side valve hole is provided on the side wall of the valve cylinder, and a constriction is provided at the lower end of the valve cylinder, the valve cylinder extends into and is fixed in the inner interface of the shell, the side valve hole is connected with the inlet flange and the inner port of the detection interface, and the end of the valve cylinder is connected with the inner end of the outlet flange;

[0007] An adjusting cylinder, the lower end of which is fixed in the constriction of the lower end of the valve cylinder, the adjusting cylinder extends into the valve cylinder and forms an annular space with the valve cylinder, and a pressure regulating hole is provided on the side wall of the adjusting cylinder;

[0008] A valve core cylinder, the outer wall of the valve core cylinder is in sliding and sealing cooperation with the inner wall of the valve cylinder, the inner wall is in sliding and sealing cooperation with the outer wall of the regulating cylinder, the upper end of the valve core cylinder is provided with a push-pull rod, the push-pull rod passes through the sealing sliding hole and extends out of the valve body;

[0009] A remote control actuation mechanism, the remote control actuation mechanism is arranged at the upper end of the valve body, and the remote control actuation mechanism is transmission-connected to the push-pull rod;

[0010] A wellhead pressure sensor, the wellhead pressure sensor is connected to the plug, and a detection probe thereof is connected to the detection interface;

[0011] The external transmission pipeline pressure sensor is fixed on the shell, and its detection probe is connected to the inner end of the outlet flange.

[0012] The present invention also has the following optional features.

[0013] Optionally, the remote control action mechanism includes:

[0014] An action frame, the action frame is connected to the upper end of the valve body, and a passive bevel gear and an active bevel gear meshing with each other are rotatably arranged on the action frame, a screw hole is arranged at the axis of the passive bevel gear, and a thread is arranged at the front end of the push-pull rod, and is matched with the thread of the passive bevel gear;

[0015] A remote control motor and a reducer are connected to each other, and the remote control motor and the reducer are fixed on the action frame, and the main shafts of the remote control motor and the reducer are connected to the active bevel gear.

[0016] Optionally, an anti-rotation plate is provided on the action frame, an anti-rotation hole is provided on the anti-rotation plate, a flat key is provided in the anti-rotation hole, a key slot is provided on the surface of the push-pull rod, the push-pull rod passes through the anti-rotation hole, and the flat key extends into the key slot.

[0017] Optionally, a manual bevel gear is rotatably provided on the anti-rotation plate, the manual bevel gear is meshed with the passive bevel gear, and one end of the manual bevel gear is connected to a hand wheel.

[0018] Optionally, an annular groove is provided on the side wall of the valve cylinder, and the side valve hole is provided in the annular groove.

[0019] Optionally, a mounting hole is provided at the upper end of the valve core tube, and the lower end of the push-pull rod extends into the mounting hole and is fixedly connected by a pin.

[0020] Optionally, a balancing channel is provided at the lower end of the push-pull rod, and the balancing channel passes through a side wall of the push-pull rod extending out of the upper end of the valve core tube.

[0021] Optionally, a drain hole is provided on the side wall of the regulating cylinder at the constriction near the lower end of the valve cylinder.

[0022] Optionally, a layer of wear-resistant sleeve is provided on the lower port and inner side wall of the valve cylinder.

[0023] The present invention also proposes a natural gas well switch adjustment method, which is implemented by the natural gas well three-in-one switch adjustment device described in claims 1 to 9, and is characterized in that the remote control action mechanism is controlled by the Internet of Things platform to drive the push-pull rod and the valve core tube to move in the valve tube of the valve body, and the valve core tube adjusts the opening of the side valve hole on the valve tube and the pressure regulating hole on the adjustment tube to adjust the pressure of the external transmission pipeline, and the wellhead of the natural gas well is closed and opened by completely blocking or completely releasing the side valve hole and the pressure regulating hole, and the pressure in the inlet flange is detected by the wellhead pressure sensor, and the pressure in the outlet flange is detected by the external transmission pipeline pressure sensor. When the pressure in the inlet flange remains unchanged and the pressure in the outlet flange suddenly decreases, the Internet of Things platform controls the remote control action mechanism to drive the push-pull rod and the valve core tube to move in the valve tube of the valve body, so that the valve core tube completely blocks the side valve hole and the pressure regulating hole, thereby realizing the shut-off function of the natural gas well.

[0024] Beneficial effects of the present invention:

[0025] The three-in-one switch adjustment device for a natural gas well and the adjustment method thereof of the present invention adopt a remote control action mechanism to drive a push-pull rod to move the valve core tube, so that the valve core tube can block or release the side valve hole on the valve tube of the valve body and the pressure regulating hole on the adjustment tube, thereby realizing closing and connecting between the inlet flange and the outlet flange of the valve body. At the same time, the air pressure in the natural gas well is detected by a wellhead pressure sensor, and the air pressure of the external transmission pipeline is detected by an external transmission pipeline pressure sensor. The Internet of Things platform can automatically perform a cut-off action according to the feedback of the pressure difference between the two, and the staff can also remotely adjust the pressure of the external transmission pipeline through the Internet of Things platform. Since each wellhead only needs to remotely control one valve body to perform the opening, closing, cut-off and parameter adjustment functions, the remote control cost is low, there is no signal interference between the same wellheads, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the full cross-section structure of an embodiment of the three-in-one switch regulating device for a natural gas well of the present invention.

[0027] In the above figure: 1 shell; 101 inlet flange; 102 detection interface; 103 outlet flange; 104 internal interface; 2 valve body; 201 valve cylinder; 202 sealing sliding hole; 203 side valve hole; 204 annular groove; 3 regulating cylinder; 301 pressure regulating hole; 302 drainage hole; 4 valve core cylinder; 401 wear-resistant sleeve; 5 push-pull rod; 501 keyway; 502 pressure balance channel; 6 plug; 7 wellhead pressure sensor; 8 external transmission pipeline pressure sensor; 9 action frame; 10 passive bevel gear; 11 active bevel gear; 12 remote control motor; 13 reducer; 14 anti-rotation plate; 15 anti-rotation hole; 16 flat key; 17 manual bevel gear; 18 handwheel; 19 pin; 20 Internet of Things platform.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0029] Example 1

[0030] refer to Figure 1 The embodiment of the present invention proposes a three-in-one switch regulating device for a natural gas well, comprising: a shell 1, a valve body 2, a regulating cylinder 3, a valve core cylinder 4, a remote control action mechanism, a wellhead pressure sensor 7, and an external transmission pipeline pressure sensor 8; an inlet flange 101 and a detection interface 102 are arranged on the side wall of the shell 1, an outlet flange 103 is arranged at one end of the shell 1, and an inner interface 104 is arranged at the other end, the inlet flange 101, the detection interface 102, the outlet flange 103 and the inner interface 104 are internally connected, and a plug 6 is connected to the detection interface 102; the valve body 2 is cylindrical, and its lower end is a valve cylinder 201, and a sealing sliding hole 202 is arranged at the upper end, and a side valve hole 203 is arranged on the side wall of the valve cylinder 201, and a constriction is arranged at the lower end of the valve cylinder 201, and the valve cylinder 201 extends into and is fixed in the inner interface 103 of the shell 1, and the side valve hole 203 is connected to the inlet flange 101 and the detection interface 1 02 is connected to the inner port, and the end of the valve cylinder 201 is connected to the inner end of the outlet flange 103; the lower end of the regulating cylinder 3 is fixed in the constriction of the lower end of the valve cylinder 201, the regulating cylinder 3 extends into the valve cylinder 201, and forms an annular space with the valve cylinder 201, and a pressure regulating hole 301 is arranged on the side wall of the regulating cylinder 3; the outer wall of the valve core cylinder 4 is slidingly sealed with the inner wall of the valve cylinder 201, and the inner wall is slidingly sealed with the outer wall of the regulating cylinder 3, and a push-pull rod 5 is arranged on the upper end of the valve core cylinder 4, and the push-pull rod 5 passes through the sealing sliding hole 202 and extends out of the valve body 2; the remote control action mechanism is arranged at the upper end of the valve body 2, and the remote control action mechanism is transmission-connected with the push-pull rod 5; the wellhead pressure sensor 7 is connected to the plug 6, and its detection probe is connected to the detection interface 102; the external transmission pipeline pressure sensor 8 is fixed on the shell 1, and its detection probe is connected to the inner end of the outlet flange 103.

[0031] refer to Figure 1 , the inlet flange 101 and the outlet flange 103 of the housing 1 are connected to the wellhead pipeline of the natural gas well, and the closed state of the regulating valve is taken as the initial state. At this time, the side wall of the valve core cylinder 4 blocks the side valve hole 203 on the valve cylinder 201 and the pressure regulating hole 301 on the regulating cylinder 3 in the valve cylinder 201, so that the inlet flange 101 and the outlet flange 103 cannot be conducted;

[0032] When the staff needs to conduct the natural gas wellhead, the remote control action mechanism is controlled by the Internet of Things platform 20 to drive the push-pull rod 5 and the valve core tube 4 to move upward in the valve tube 201 of the valve body 2 until the valve core tube 4 makes way for the side valve hole 203 and the pressure regulating hole 301. At this time, the inlet flange 101 connected to the natural gas wellhead can be conducted through the side valve hole 203, the pressure regulating hole 301 and the outlet flange 103. The natural gas in the natural gas well enters the valve tube 201 through the inlet flange 101 and the side valve hole 203, enters the regulating tube 3 from the pressure regulating hole 301, and flows into the natural gas pipeline from the outlet flange 103;

[0033] When the staff needs to shut down the natural gas well, the remote control action mechanism can be controlled through the Internet of Things platform 20 to drive the push-pull rod 5 and the valve core cylinder 4 to move downward in the valve cylinder 201 until the valve core cylinder 4 blocks the side valve hole 203 on the valve cylinder 201 and the pressure regulating hole 301 on the regulating cylinder 3;

[0034] When the external transmission pipeline pressure needs to be adjusted, it is only necessary to partially block the pressure regulating hole 301 on the regulating cylinder 3 with the valve core tube 201, and at the same time perform correction according to the pressure signal transmitted back to the Internet of Things detection platform 20 by the external transmission pipeline pressure sensor 8.

[0035] When the external transmission pipeline ruptures, the wellhead pressure sensor 7 detects that the pressure is normal, and the external transmission pipeline pressure sensor 8 detects that the pressure suddenly drops. At this time, the Internet of Things platform 20 will automatically control the remote control action mechanism to drive the push-pull rod 5 and the valve core tube 4 to move downward rapidly in the valve tube 201 until the valve core tube 4 completely blocks the side valve hole 203 on the valve tube 201 and the pressure regulating hole 301 on the regulating tube 3, thereby cutting off the connection between the inlet flange 101 and the outlet flange 103.

[0036] Example 2

[0037] refer to Figure 1On the basis of Example 1, the remote control action mechanism includes an action frame 9, a remote control motor 12, and a reducer 13; the action frame 9 is connected to the upper end of the valve body 2, and the action frame 9 is rotatably provided with a passive bevel gear 10 and an active bevel gear 11 that mesh with each other, a screw hole is provided at the axis of the passive bevel gear 10, and a thread is provided at the front end of the push-pull rod 5, and is matched with the thread of the passive bevel gear 10; the remote control motor 12 and the reducer 13 are connected, and the remote control motor 12 and the reducer 13 are fixed on the action frame 9, and its main shaft is connected to the active bevel gear 11.

[0038] When the staff needs to conduct the natural gas wellhead, the remote control motor 12 is controlled to rotate through the Internet of Things platform 20. The remote control motor 12 drives the active bevel gear 11 and the passive bevel gear 10 to rotate through the reducer 3. When the passive bevel gear 10 rotates, the thread in the screw hole at its axis pushes the push-pull rod 5 to move upward, and the push-pull rod 5 drives the valve core tube 4 to move upward in the valve tube 201 of the valve body 2 until the valve core tube 4 makes way for the side valve hole 203 and the pressure regulating hole 301. At this time, the inlet flange 101 connected to the natural gas wellhead can be conducted through the side valve hole 203, the pressure regulating hole 301 and the outlet flange 103.

[0039] Example 3

[0040] refer to Figure 1 On the basis of Example 2, an anti-rotation plate 14 is provided on the action frame 9, an anti-rotation hole 15 is provided on the anti-rotation plate 14, a flat key 16 is provided in the anti-rotation hole 15, a key groove 501 is provided on the surface of the push-pull rod 5, the push-pull rod 5 passes through the anti-rotation hole 15, and the flat key 16 extends into the key groove 501.

[0041] The keyway 501 extends axially on the surface of the push-pull rod 5. After the push-pull rod 5 is inserted into the anti-rotation plate 14, the flat key 16 on the anti-rotation plate 14 is inserted into the keyway 501, which can prevent the push-pull rod 5 from rotating and ensure that the passive bevel gear 10 can push the push-pull rod 5 through the thread when rotating.

[0042] Example 4

[0043] refer to Figure 1 On the basis of Example 1, a manual bevel gear 17 is rotatably provided on the anti-rotation plate 14 , the manual bevel gear 17 is meshed with the passive bevel gear 10 , and one end of the manual bevel gear 17 is connected to a hand wheel 18 .

[0044] The hand wheel 18 is fixedly connected to the end face of the manual bevel gear 17. The staff can rotate the hand wheel 18 to drive the passive bevel gear 17 to rotate, thereby adjusting the position of the valve core tube 4 to control the opening and closing of the natural gas well and the pressure regulation of the external transmission pipeline.

[0045] Example 5

[0046] refer to Figure 1On the basis of Example 1, an annular groove 204 is provided on the side wall of the valve cylinder 201 , and the side valve hole 203 is provided in the annular groove 204 .

[0047] There are eight side valve holes 203 , all of which are disposed in an annular groove 204 on the valve cylinder 201 . The annular groove 204 provides an air path between the eight side valve holes 203 and the inner port of the inlet flange 101 .

[0048] Example 6

[0049] refer to Figure 1 On the basis of Example 1, a mounting hole is provided at the upper end of the valve core tube 4, and the lower end of the push-pull rod 5 extends into the mounting hole and is fixedly connected by a pin 19.

[0050] After the lower end of the push-pull rod 5 extends into the mounting hole at the upper end of the valve core tube 4, the pin 19 horizontally penetrates the valve core tube 4 and the push-pull rod 5, so that they are fixedly connected together.

[0051] Example 7

[0052] refer to Figure 1 On the basis of Example 6, a balancing channel 502 is provided at the lower end of the push-pull rod 5 , and the balancing channel 502 passes through the side wall of the push-pull rod 5 extending out of the upper end of the valve core tube 4 .

[0053] When the push-pull rod 5 pushes the valve core tube 4 to move downward, a vacuum will be generated between the valve core tube 4 and the inner end of the sealing slide hole 202 in the valve tube 201. Therefore, it is necessary to set a pressure balance channel 502 between the end of the push-pull rod 5 and the side wall. The pressure balance channel 502 is composed of a transverse through hole radially penetrating the push-pull rod 5 and a through hole set at the end of the push-pull rod 5. The two are connected to ensure that the pressure is balanced everywhere when the valve core tube 4 moves downward, thereby reducing the movement resistance of the valve core tube 4.

[0054] Example 8

[0055] refer to Figure 1 On the basis of Example 1, a drain hole 302 is provided on the side wall of the regulating cylinder 3 at the constriction near the lower end of the valve cylinder 201 .

[0056] The water or other dirt brought out of the natural gas will accumulate between the regulating cylinder 3 and the lower end of the valve cylinder 201. The drain hole 302 is provided at the lower part of the regulating cylinder 3 to facilitate the discharge of the water or dirt.

[0057] Example 9

[0058] refer to Figure 1 On the basis of Example 1, a wear-resistant sleeve 401 is provided on the lower port and the inner wall of the valve cylinder 201 .

[0059] The wear-resistant sleeve 401 can be made of ceramic material or other alloy materials to ensure the sealing between the valve cylinder 201 and the regulating cylinder 3.

[0060] Example 10

[0061] refer to Figure 1 The embodiment of the present invention provides a natural gas well switch adjustment method, which is implemented by using the natural gas well three-in-one switch adjustment device described in any of the above embodiments, mainly: the remote control action mechanism is controlled by the Internet of Things platform 20 to drive the push-pull rod 5 and the valve core tube 4 to move in the valve cylinder 201 of the valve body 2, and the valve core tube 4 adjusts the opening of the side valve hole 203 on the valve cylinder 201 and the pressure regulating hole 301 on the regulating cylinder 3 to adjust the pressure of the external transmission pipeline, and the side valve hole 203 and the pressure regulating hole 301 are completely blocked or completely released. The wellhead of the gas well is closed and opened, the pressure in the inlet flange 101 is detected by the wellhead pressure sensor 7, and the pressure in the outlet flange 103 is detected by the external transmission pipeline pressure sensor 8. When the pressure in the inlet flange 101 remains unchanged and the pressure in the outlet flange 103 suddenly decreases, the Internet of Things platform 20 controls the remote control action mechanism to drive the push-pull rod 5 and the valve core tube 4 to move in the valve tube 201 of the valve body 2, so that the valve core tube 201 completely blocks the side valve hole 203 and the pressure regulating hole 301, thereby realizing the shut-off function of the natural gas well.

[0062] The inlet flange 101 and the outlet flange 103 of the housing 1 are connected to the wellhead pipeline of the natural gas well. The closed state of the regulating valve is taken as the initial state. At this time, the side wall of the valve core cylinder 4 blocks the side valve hole 203 on the valve cylinder 201 and the pressure regulating hole 301 on the regulating cylinder 3 in the valve cylinder 201, so that the inlet flange 101 and the outlet flange 103 cannot be conducted.

[0063] When the staff needs to conduct the natural gas wellhead, the remote control motor 12 is controlled to rotate through the Internet of Things platform 20, and the remote control motor 12 drives the active bevel gear 11 and the passive bevel gear 10 to rotate through the reducer 3. When the passive bevel gear 10 rotates, the thread in the screw hole at the axis pushes the push-pull rod 5 to move upward, and the push-pull rod 5 drives the valve core tube 4 to move upward in the valve tube 201 of the valve body 2 until the valve core tube 4 makes way for the side valve hole 203 and the pressure regulating hole 301. At this time, the inlet flange 101 connected to the natural gas wellhead can be conducted through the side valve hole 203, the pressure regulating hole 301 and the outlet flange 103, and the natural gas in the natural gas well enters the valve tube 201 through the inlet flange 101 and the side valve hole 203, and enters the regulating tube 3 from the pressure regulating hole 301, and flows into the natural gas pipeline from the outlet flange 103;

[0064] When the staff needs to shut down the natural gas well, the remote control motor 12 is controlled to rotate in the opposite direction through the Internet of Things platform 20. The remote control motor 12 drives the active bevel gear 11 and the passive bevel gear 10 to rotate in the opposite direction through the reducer 3. When the passive bevel gear 10 rotates in the opposite direction, the thread in the screw hole at the axis of the passive bevel gear 10 pushes the push-pull rod 5 to move downward, and the push-pull rod 5 drives the valve core tube 4 to move downward in the valve tube 201 until the valve core tube 4 blocks the side valve hole 203 on the valve tube 201 and the pressure regulating hole 301 on the regulating tube 3.

[0065] When the external transmission pipeline pressure needs to be adjusted, it is only necessary to partially block the pressure regulating hole 301 on the regulating cylinder 3 with the valve core tube 201, and at the same time perform correction according to the pressure signal transmitted back to the Internet of Things detection platform 20 by the external transmission pipeline pressure sensor 8.

[0066] When the external transmission pipeline ruptures, the wellhead pressure sensor 7 detects that the pressure is normal, and the external transmission pipeline pressure sensor 8 detects that the pressure suddenly drops. At this time, the Internet of Things platform 20 will automatically remotely control the motor 12 to rotate in the opposite direction. The remote control motor 12 drives the active bevel gear 11 and the passive bevel gear 10 to rotate in the opposite direction through the reducer 3. When the passive bevel gear 10 rotates in the opposite direction, the thread in the screw hole at its axis pushes the push-pull rod 5 to move downward, and the push-pull rod 5 drives the valve core tube 4 to move downward in the valve tube 201 until the valve core tube 4 completely blocks the side valve hole 203 on the valve tube 201 and the pressure regulating hole 301 on the regulating tube 3, thereby cutting off the connection between the inlet flange 101 and the outlet flange 103.

[0067] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. A three-in-one switch regulating device for a natural gas well, characterized in that: include: A shell (1), wherein an inlet flange (101) and a detection interface (102) are provided on a side wall of the shell (1), an outlet flange (103) is provided at one end of the shell (1), and an inner interface (104) is provided at the other end, the inlet flange (101), the detection interface (102), the outlet flange (103) and the inner interface (104) are internally connected, and a plug (6) is connected to the detection interface (102); A valve body (2), the valve body (2) being cylindrical in shape, with a valve cylinder (201) at its lower end and a sealing sliding hole (202) at its upper end, a side valve hole (203) being provided on the side wall of the valve cylinder (201), a constriction being provided at the lower end of the valve cylinder (201), the valve cylinder (201) extending into and fixed in the inner interface (104) of the housing (1), the side valve hole (203) being connected to the inlet flange (101) and the inner port of the detection interface (102), the end of the valve cylinder (201) being connected to the inner end of the outlet flange (103), and a layer of wear-resistant insert (401) being provided at the lower port and the inner side wall of the valve cylinder (201); an adjusting cylinder (3), wherein the lower end of the adjusting cylinder (3) is fixed in the constriction of the lower end of the valve cylinder (201), the adjusting cylinder (3) extends into the valve cylinder (201) and forms an annular space with the valve cylinder (201), and a pressure regulating hole (301) is provided on the side wall of the adjusting cylinder (3); a valve core cylinder (4), wherein the outer wall of the valve core cylinder (4) is in sliding sealing cooperation with the inner wall of the valve cylinder (201), and the inner wall is in sliding sealing cooperation with the outer wall of the adjusting cylinder (3), and the upper end of the valve core cylinder (4) is provided with a push-pull rod (5), and the push-pull rod (5) passes through the sealing sliding hole (202) and extends out of the valve body (2); The regulating cylinder (3) is provided with a drain hole (302) on the side wall at the constricted portion close to the lower end of the valve cylinder (201); A remote control actuation mechanism, the remote control actuation mechanism being arranged at the upper end of the valve body (2), the remote control actuation mechanism being in transmission connection with the push-pull rod (5); A wellhead pressure sensor (7), the wellhead pressure sensor (7) being connected to the plug (6), and the detection probe of the wellhead pressure sensor (7) being in communication with the detection interface (102); An external transmission pipeline pressure sensor (8), wherein the external transmission pipeline pressure sensor (8) is fixed on the housing (1), and a detection probe thereof is connected to the inner end of the outlet flange (103).

2. The three-in-one switch regulating device for a natural gas well according to claim 1 is characterized in that: The remote control action mechanism comprises: An action frame (9), the action frame (9) is connected to the upper end of the valve body (2), and a passive bevel gear (10) and an active bevel gear (11) are rotatably arranged on the action frame (9), the passive bevel gear (10) is provided with a screw hole at the axis of the passive bevel gear (10), and a thread is arranged at the front end of the push-pull rod (5) and is matched with the thread of the passive bevel gear (10); a remote control motor (12) and a reducer (13), the remote control motor (12) and the reducer (13) are connected, and the remote control motor (12) and the reducer (13) are fixed on the action frame (9), and the main shafts of the remote control motors (12) and the active bevel gear (11) are connected.

3. The three-in-one switch regulating device for a natural gas well according to claim 2 is characterized in that: The action frame (9) is provided with an anti-rotation plate (14), the anti-rotation plate (14) is provided with an anti-rotation hole (15), a flat key (16) is provided in the anti-rotation hole (15), a key slot (501) is provided on the surface of the push-pull rod (5), the push-pull rod (5) passes through the anti-rotation hole (15), and the flat key (16) extends into the key slot (501).

4. The three-in-one switch regulating device for a natural gas well according to claim 3 is characterized in that: A manual bevel gear (17) is rotatably provided on the anti-rotation plate (14), the manual bevel gear (17) is meshed with the passive bevel gear (10), and one end of the manual bevel gear (17) is connected to a hand wheel (18).

5. The three-in-one switch regulating device for a natural gas well according to claim 1, characterized in that: An annular groove (204) is provided on the side wall of the valve cylinder (201), and the side valve hole (203) is arranged in the annular groove (204).

6. The three-in-one switch regulating device for a natural gas well according to claim 1, characterized in that: The upper end of the valve core tube (4) is provided with a mounting hole, and the lower end of the push-pull rod (5) extends into the mounting hole and is fixedly connected via a pin (19).

7. The three-in-one switch regulating device for a natural gas well according to claim 6, characterized in that: A balancing channel (502) is provided at the lower end of the push-pull rod (5), and the balancing channel (502) passes through a side wall of the push-pull rod (5) extending out of the upper end of the valve core tube (4).

8. A method for regulating the switch of a natural gas well, implemented by using the three-in-one switch regulating device of a natural gas well according to any one of claims 1 to 7, characterized in that: The remote control action mechanism is controlled by the Internet of Things platform to drive the push-pull rod and the valve core tube to move in the valve cylinder of the valve body, and the valve core tube adjusts the opening of the side valve hole on the valve cylinder and the pressure regulating hole on the regulating cylinder to adjust the pressure of the external transmission pipeline. The wellhead of the natural gas well is closed and opened by completely blocking or completely releasing the side valve hole and the pressure regulating hole. The pressure in the inlet flange is detected by the wellhead pressure sensor, and the pressure in the outlet flange is detected by the external transmission pipeline pressure sensor. When the pressure in the inlet flange remains unchanged and the pressure in the outlet flange suddenly decreases, the Internet of Things platform controls the remote control action mechanism to drive the push-pull rod and the valve core tube to move in the valve cylinder of the valve body, so that the valve core tube completely blocks the side valve hole and the pressure regulating hole, thereby realizing the shut-off function of the natural gas well.

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