Wellhead stop valve control device

Abstract

The utility model relates to the technical field of emergency cut-off valves, and discloses a wellhead cut-off valve control device which comprises a driving piece, a transmission mechanism, a control mechanism and a cut-off valve. The driving part is connected with the transmission mechanism, the transmission mechanism is connected with the stop valve, and the driving part controls opening and closing of the stop valve through the transmission mechanism; the control mechanism is in electric signal connection with the driving part, is used for controlling opening and closing of the driving part, is connected with the control mechanism through wireless signals, remotely transmits control information to the control mechanism and controls rotation and opening and closing of the driving part through the control mechanism, and the driving part controls opening and closing of the stop valve through the transmission mechanism. Therefore, workers do not need to operate on site, the technical problem that in the prior art, the natural gas well mouth cannot be closed in time under the emergency situation, and danger is likely to be caused is solved, and the technical effects that the natural gas well mouth can be remotely closed and opened, the natural gas well mouth can be closed in time, and danger is avoided are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of emergency cut-off valves, in particular to a wellhead cut-off valve control device. Background Art

[0002] Emergency shut-off valves are primarily installed at wellheads or pipelines in gas (oil) production facilities to prevent sudden pressure increases or decreases at the wellhead or pipeline, which could cause pipeline ruptures or damage downstream equipment. Natural gas wellheads are relatively dispersed, and most are located in sparsely populated areas, far from manned gas gathering stations. In an emergency, the wellheads cannot be shut down in time, creating a dangerous situation. Utility Model Content

[0003] The purpose of the utility model is to provide a wellhead cut-off valve control device to solve the technical problem in the prior art that the natural gas wellhead cannot be closed in time in an emergency, which easily causes danger.

[0004] In order to solve the above technical problems, the utility model provides a wellhead cut-off valve control device, including a driving member, a transmission mechanism, a control mechanism and a cut-off valve;

[0005] The driving member is connected to the transmission mechanism, the transmission mechanism is connected to the shut-off valve, and the driving member controls the opening and closing of the shut-off valve through the transmission mechanism;

[0006] The control mechanism is connected to the driving member by electrical signals, and the control mechanism is used to control the opening and closing of the driving member.

[0007] In an optional embodiment, the transmission mechanism includes a transmission shaft assembly and a gear assembly;

[0008] The transmission shaft assembly is connected to the driving member, the transmission shaft assembly is in transmission connection with the gear assembly, the gear assembly is in transmission connection with the shut-off valve, and the driving member drives the shut-off valve to open and close through the transmission shaft assembly and the gear assembly.

[0009] In an optional embodiment, the transmission shaft assembly includes: a clutch, a connecting sleeve, a connecting wheel and a first eccentric wheel;

[0010] The clutch is connected to the driving member, the connecting sleeve is sleeved on the clutch, and the connecting sleeve is frictionally connected to the clutch;

[0011] The connecting wheel is connected to a side of the connecting sleeve away from the driving member, the first eccentric wheel is connected to a side of the connecting wheel away from the driving member, and the first eccentric wheel abuts against the gear assembly.

[0012] In an optional embodiment, the gear assembly includes: a cam, a second eccentric wheel, a gear shaft, a gear ring and a flange;

[0013] The cam is eccentrically arranged on the second eccentric wheel, the second eccentric wheel is connected to one end of the gear shaft, the gear ring is sleeved on the gear shaft, the end of the gear shaft away from the second eccentric wheel is inserted into the flange and rotatably connected to the flange, and the flange is fixed to the shut-off valve;

[0014] The cam is connected to the second eccentric wheel, and the ring gear is transmission-connected to the shut-off valve.

[0015] In an optional embodiment, the shut-off valve includes a housing, a rack, a valve stem, and a valve body;

[0016] The rack, the valve stem and the valve body are arranged in the housing, the two ends of the valve stem are connected to the rack and the valve body respectively, and the rack, the valve stem and the valve body are slidably connected to the housing respectively;

[0017] The rack is connected to the transmission mechanism, and the transmission mechanism drives the valve body to slide relative to the housing through the rack and the valve stem.

[0018] In an optional embodiment, a manual mechanism is further included;

[0019] The manual mechanism is provided on the housing, one end of the manual mechanism extends into the housing and is transmission-connected to the rack, and the other end of the manual mechanism extends through the housing. The manual mechanism can drive the valve body through the rack and the valve stem.

[0020] In an optional embodiment, the manual mechanism includes a reset gear, a reset shaft and a handle;

[0021] The reset gear is engaged with the rack, the reset gear is connected to the reset shaft, the reset shaft is rotatably connected to the housing, and the handle is mounted on an end of the reset shaft away from the reset gear.

[0022] In an optional embodiment, a detection mechanism is further included;

[0023] The detection mechanism is arranged in the housing, and is connected to the cut-off valve and the transmission mechanism respectively. The detection mechanism is used to detect the opening amplitude of the valve body and the rotation angle of the transmission mechanism.

[0024] In an optional embodiment, the detection mechanism includes a valve position sensor;

[0025] The valve position sensor is connected to the housing and the valve stem respectively, and is used to detect the relative position of the valve stem and the housing.

[0026] In an optional embodiment, the detection mechanism further includes an angle sensor;

[0027] The angle sensor is connected to the transmission mechanism and the housing respectively, and is used to detect the rotation angle of the transmission mechanism relative to the housing.

[0028] The utility model provides a wellhead shut-off valve control device, including a driving member, a transmission mechanism, a control mechanism and a shut-off valve; the driving member is connected to the transmission mechanism, the transmission mechanism is connected to the shut-off valve, and the driving member controls the opening and closing of the shut-off valve through the transmission mechanism; the control mechanism is connected to the driving member by electrical signals, the control mechanism is used to control the opening and closing of the driving member, is connected to the control mechanism through wireless signals, remotely transmits control information to the control mechanism, and controls the rotation and opening and closing of the driving member through the control mechanism, and the driving member controls the opening and closing of the shut-off valve through the transmission mechanism, thereby eliminating the need for staff to go to the site for operation, solving the technical problem in the prior art that the natural gas wellhead cannot be closed in time in an emergency, which easily causes danger, and achieving the technical effect that the natural gas wellhead can be remotely closed and opened, the natural gas wellhead can be sealed in time, and danger can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a partial sectional front view of the wellhead cut-off valve control device mentioned in an embodiment of the present utility model;

[0030] Figure 2 This is a partial cross-sectional structural diagram of the wellhead cut-off valve control device mentioned in an embodiment of the present utility model;

[0031] Figure 3 This is a schematic structural diagram of the driving member and the transmission shaft assembly mentioned in the embodiment of the present utility model;

[0032] Figure 4 This is a schematic structural diagram of the gear assembly mentioned in an embodiment of the present utility model;

[0033] Figure 5 This is a cross-sectional view of the gear assembly mentioned in the embodiment of the present invention.

[0034] In the figure, 1-driving member; 2-transmission mechanism; 201-transmission shaft assembly; 2011-clutch; 2012-connecting sleeve; 2013-connecting wheel; 2014-first eccentric wheel; 202-gear assembly; 2021-cam; 2022-second eccentric wheel; 2023-gear shaft; 2024-gear ring; 2025-flange; 3-control mechanism; 4-shut-off valve; 401-housing; 402-rack; 403-valve stem; 404-valve body; 5-manual mechanism; 501-reset gear; 502-reset shaft; 503-handle; 6-detection mechanism; 601-valve position sensor; 602-angle sensor. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0037] In related technologies, natural gas wellheads are relatively scattered, and most of them are located in sparsely populated areas, far away from manned gas gathering stations. In an emergency, the natural gas wellheads cannot be closed in time, which can easily cause danger.

[0038] In view of this, if Figure 1-Figure 5 As shown, some embodiments of the present invention provide a wellhead shut-off valve 4 control device, including a drive 1, a transmission mechanism 2, a control mechanism 3 and a shut-off valve 4; the drive 1 is connected to the transmission mechanism 2, the transmission mechanism 2 is connected to the shut-off valve 4, and the drive 1 controls the opening and closing of the shut-off valve 4 through the transmission mechanism 2; the control mechanism 3 is electrically connected to the drive 1, and the control mechanism 3 is used to control the opening and closing of the drive 1.

[0039] In the above embodiment, the driving member 1 can adopt an isolated explosion-proof motor or a stepper motor. The output end of the driving member 1 can be connected to the transmission mechanism 2, and the transmission mechanism 2 can be rotatably connected to the shut-off valve 4. The transmission mechanism 2 is transmission-connected to the shut-off valve 4 so that the driving member 1 can control the opening and closing of the shut-off valve 4 through the transmission mechanism 2. Furthermore, the transmission mechanism 2 can be rotatably connected to one side of the shut-off valve 4 so that the driving end of the driving member 1 can drive the transmission mechanism 2 to rotate relative to the shut-off valve 4, and the control mechanism 3 can be fixed on the shell surface of the shut-off valve 4. The control mechanism 3 can adopt a computer, or a PLC module, or an RTU transmitter or other device that can receive wireless signals and transmit information to the driving member 1, so that the operator can send a signal to the control mechanism 3 through a computer, mobile phone or other device in a remote location, and the signal is transmitted to the driving member 1 through the control mechanism 3. The driving member 1 drives the transmission mechanism 2 to rotate according to the signal transmitted by the control mechanism 3, thereby controlling the opening and closing of the shut-off valve 4.

[0040] Some embodiments of the present invention provide a control device for a wellhead shut-off valve 4, comprising a drive member 1, a transmission mechanism 2, a control mechanism 3 and a shut-off valve 4; the drive member 1 is connected to the transmission mechanism 2, the transmission mechanism 2 is connected to the shut-off valve 4, and the drive member 1 controls the opening and closing of the shut-off valve 4 through the transmission mechanism 2; the control mechanism 3 is electrically connected to the drive member 1, and the control mechanism 3 is used to control the opening and closing of the drive member 1, is connected to the control mechanism 3 through a wireless signal, remotely transmits control information to the control mechanism 3, and controls the rotation and opening and closing of the drive member 1 through the control mechanism 3, and the drive member 1 controls the opening and closing of the shut-off valve 4 through the transmission mechanism 2, thereby eliminating the need for staff to go to the site for operation, solving the technical problem in the prior art that the natural gas wellhead cannot be closed in time in an emergency, which easily causes danger, and achieving the technical effect that the natural gas wellhead can be remotely closed and opened, the natural gas wellhead can be sealed in time, and danger can be avoided.

[0041] In an optional embodiment, the transmission mechanism 2 includes a transmission shaft assembly 201 and a gear assembly 202; the transmission shaft assembly 201 is connected to the driving member 1, the transmission shaft assembly 201 is transmission-connected to the gear assembly 202, the gear assembly 202 is transmission-connected to the shut-off valve 4, and the driving member 1 drives the shut-off valve 4 to open and close through the transmission shaft assembly 201 and the gear assembly 202.

[0042] In the above embodiment, the transmission shaft assembly 201 is arranged at the output end of the driving member 1, and the transmission shaft assembly 201 is arranged to coincide with the axis of the driving member 1. The transmission shaft assembly 201 can be connected to the output shaft of the output member by a slot key connection. The end of the transmission shaft assembly 201 facing away from the driving member 1 is connected to the gear assembly 202. The connection methods include shaft connection, gear connection, transmission belt connection and abutment. The transmission shaft assembly 201 drives the gear assembly 202 to rotate, and the rotation axis of the gear assembly 202 is also arranged to coincide with the axis of the driving member 1. The gear assembly 202 is connected to the shut-off valve 4 so that the gear assembly 202 can drive the shut-off valve 4 to move through the teeth, thereby realizing the opening and closing of the shut-off valve 4.

[0043] In an optional embodiment, the transmission shaft assembly 201 includes: a clutch 2011, a connecting sleeve 2012, a connecting wheel 2013 and a first eccentric wheel 2014; the clutch 2011 is connected to the driving member 1, the connecting sleeve 2012 is mounted on the clutch 2011, and the connecting sleeve 2012 is frictionally connected to the clutch 2011; the connecting wheel 2013 is connected to the side of the connecting sleeve 2012 away from the driving member 1, the first eccentric wheel 2014 is connected to the side of the connecting wheel 2013 away from the driving member 1, and the first eccentric wheel 2014 is in contact with the gear assembly 202.

[0044] In the above embodiment, the clutch 2011 is sleeved on the output shaft of the driving member 1, and the clutch 2011 is fixedly connected to the driving member 1 by a key, so that the driving member 1 can drive the clutch 2011 to rotate, and the clutch 2011 is sleeved with a connecting sleeve 2012, and the connecting sleeve 2012 is frictionally connected to the clutch 2011. Figure 3 As shown, the clutch 2011 may have an axial protrusion, and the connecting sleeve 2012 may also be provided with a corresponding friction ring for rubbing with the clutch 2011. The protrusion on the clutch 2011 and the friction ring on the connecting sleeve 2012 enable the clutch 2011 to drive the connecting sleeve 2012 to rotate through friction. Wear-resistant materials, including ceramics, may be provided on the side walls of the protrusion and the side walls of the friction ring, so that when the connecting sleeve 2012 is subjected to less force, the clutch 2011 can drive the connecting sleeve 2012 to rotate synchronously, and when the connecting sleeve 2012 is subjected to greater force, the clutch 2011 cannot drive the connecting sleeve 2012 to rotate, and the wear-resistant material at the friction part rubs against the connecting sleeve 2012 to achieve the clutching effect.

[0045] Furthermore, the end of the connecting sleeve 2012 away from the driving member 1 is fixedly connected to the connecting wheel 2013, and the connecting wheel 2013 can be made of metal. The connecting wheel 2013 can be fixedly connected to the connecting sleeve 2012 by bolts, and the connecting wheel 2013 can move synchronously with the rotation of the connecting sleeve 2012. A through hole is also provided on the axis of the connecting wheel 2013, and the connecting wheel 2013 passes through the through hole by bolts and is fixed to the driving shaft of the driving member 1, and the end of the connecting wheel 2013 away from the driving member 1 is also fixedly connected to the first eccentric wheel 2014, and the first eccentric wheel 2014 can be fixed to the connecting wheel 2013 by bolts. The end of the first eccentric wheel 2014 away from the driving member 1 is connected to the gear assembly 202. After the first eccentric wheel 2014 rotates to a specific position, the characteristics of the first eccentric wheel 2014 can abut against the gear assembly 202, so that the gear assembly 202 starts to rotate, so that the opening and closing of the shut-off valve 4 can be controlled by the gear assembly 202.

[0046] The clutch 2011 is provided so that when the shut-off valve 4 is stuck or the driving member 1 is blocked, the clutch 2011 can be used to cause the shut-off valve 4 to slip, thereby preventing the shut-off valve 4 from being damaged.

[0047] In an optional embodiment, the gear assembly 202 includes: a cam 2021, a second eccentric wheel 2022, a gear shaft 2023, a ring gear 2024 and a flange 2025; the cam 2021 is eccentrically arranged on the second eccentric wheel 2022, the second eccentric wheel 2022 is connected to one end of the gear shaft 2023, the ring gear 2024 is sleeved on the gear shaft 2023, the end of the gear shaft 2023 away from the second eccentric wheel 2022 is inserted into the flange 2025 and is rotatably connected to the flange 2025, and the flange 2025 is fixed on the shut-off valve 4; the cam 2021 is connected to the second eccentric wheel 2022, and the ring gear 2024 is transmission-connected to the shut-off valve 4.

[0048] In the above embodiment, the cam 2021 can be vertically arranged on the second eccentric wheel 2022, and the cam 2021 can be connected to the second eccentric wheel 2022 by a thread. The cam 2021 is arranged at one end of the second eccentric wheel 2022 close to the first eccentric wheel 2014, and the end of the second eccentric wheel 2022 away from the cam 2021 is fixedly connected to the gear shaft 2023. The second eccentric wheel 2022 can be fixedly connected to the gear shaft 2023 by bolts, and the gear ring 2024 is sleeved on the gear shaft 2023. The gear ring 2024 can be connected to the gear shaft 2023 by a slot key. 23 connection, the flange 2025 is set at the end of the ring gear 2024 away from the driving member 1, the flange 2025 is sleeved on the gear shaft 2023, the flange 2025 is rotatably connected to the gear shaft 2023, and a groove for fixing the bearing can be set in the flange 2025, and two or more bearings can be provided, and the two or more bearings are arranged at intervals along the length direction of the gear shaft 2023. The flange 2025 can rotate relative to the gear shaft 2023 through the bearing, and the flange 2025 can be fixed on the surface of the shut-off valve 4 and fixedly connected to fix the gear shaft 2023.

[0049] Furthermore, after the driving member 1 drives the clutch 2011, the clutch 2011 can drive the connecting sleeve 2012 to connect, and the connecting sleeve 2012 drives the connecting wheel 2013 and the first eccentric wheel 2014. The protrusion on the first eccentric wheel 2014 can abut against the cam 2021 on the second eccentric wheel 2022 after rotation, so that the second eccentric wheel 2022 starts to rotate, and the second eccentric wheel 2022 drives the gear shaft 2023 and the ring gear 2024 to start rotating in turn. After the ring gear 2024 rotates, it drives the shut-off valve 4 to open and close.

[0050] In an optional embodiment, the shut-off valve 4 includes a shell 401, a rack 402, a valve stem 403 and a valve body 404; a rack 402, a valve stem 403 and a valve body 404 are provided in the shell 401, and the two ends of the valve stem 403 are respectively connected to the rack 402 and the valve body 404, and the rack 402, the valve stem 403 and the valve body 404 are respectively slidably connected to the shell 401; the rack 402 is connected to the transmission mechanism 2, and the transmission mechanism 2 drives the valve body 404 to slide relative to the shell 401 through the rack 402 and the valve stem 403.

[0051] In the above embodiment, the shell 401 can be made of metal, and a accommodating space is provided inside the shell 401. A slender channel for fixing the rack 402 is provided inside the shell 401, and the channel points to the valve body 404. A raft is provided in the valve body 404, and the two ends of the valve stem 403 are respectively connected to the rack 402 and the raft in the valve body 404. The valve stem 403 and the rack 402 are arranged on the same straight line, so that the valve stem 403 and the rack 402 can drive the raft to move, thereby completing the opening and closing of the valve body 404, and the rack 402 can penetrate into the channel and be slidably connected to the channel. A gear ring 2024 can be provided on one side of the channel, and the gear ring 2024 is engaged with the rack 402, so that the gear ring 2024 can drive the rack 402 to slide relative to the channel, so that the valve stem 403 drives the raft to move to complete the opening and closing of the valve body 404.

[0052] In an optional embodiment, a manual mechanism 5 is further included; the manual mechanism 5 is passed through the outer shell 401, one end of the manual mechanism 5 extends into the outer shell 401 and is transmission-connected to the rack 402, and the other end of the manual mechanism 5 extends through the outer shell 401. The manual mechanism 5 can drive the valve body 404 through the rack 402 and the valve stem 403.

[0053] In the above embodiment, the manual mechanism 5 is rotatably connected to the outer shell 401, the manual mechanism 5 is also engaged with the rack 402, and the manual mechanism 5 extends out of the outer shell 401 and can be twisted by the operator, so that the on-site operator can drive the rack 402 and the valve stem 403 to move through the manual mechanism 5, thereby driving the raft to move relative to the outer shell 401, to realize the opening and closing of the valve body 404, and can be manually opened and closed in an emergency, avoiding the inability to close or open the shut-off valve 4 when the drive member 1 or the transmission mechanism 2 is damaged.

[0054] In an optional embodiment, the manual mechanism 5 includes a reset gear 501, a reset shaft 502 and a handle 503; the reset gear 501 is engaged with the rack 402, the reset gear 501 is connected to the reset shaft 502, the reset shaft 502 is rotatably connected to the housing 401, and the handle 503 is installed at the end of the reset shaft 502 away from the reset gear 501.

[0055] In the above embodiment, the reset gear 501 is engaged with the rack 402, the reset gear 501 is sleeved on the reset shaft 502, the axes of the reset gear 501 and the reset shaft 502 are arranged to coincide with each other, the reset gear 501 is fixedly connected to the reset shaft 502, so that the reset shaft 502 can drive the reset gear 501 to rotate, and the reset shaft 502 extends out of the housing 401 and is rotatably connected to the housing 401, and a handle 503 is provided at one end of the reset shaft 502 extending out of the housing 401, and the handle 503 is arranged perpendicular to the reset shaft 502, so that the operator can drive the reset shaft 502 to rotate through the handle 503, and the reset shaft 502 can drive the movement of the rack 402 through the reset gear 501, thereby realizing the opening and closing of the valve body 404.

[0056] In an optional embodiment, a detection mechanism 6 is further included; the detection mechanism 6 is arranged in the housing 401, and the detection mechanism 6 is respectively connected to the shut-off valve 4 and the transmission mechanism 2, and the detection mechanism 6 is used to detect the opening amplitude of the valve body 404 and the rotation angle of the transmission mechanism 2.

[0057] In the above embodiment, the detection mechanism 6 is arranged in the accommodating space, the detection mechanism 6 can be fixed at one end of the channel close to the valve body 404, the detection mechanism 6 can be fixedly connected to the shell 401, and the detection mechanism 6 can detect the relative position of the valve stem 403 and the rack 402 in the channel, thereby inferring the opening amplitude of the valve body 404 through the position of the valve stem 403 and the rack 402, and can also infer whether the valve body 404 is fully open or fully closed, thereby determining the state of the valve body 404. Furthermore, the detection mechanism 6 is also arranged on the shell 401 and corresponds to the transmission mechanism 2. The detection mechanism 6 can detect the rotation angle of the transmission mechanism 2, thereby judging the number of circles or angles rotated by the transmission mechanism 2.

[0058] In an optional embodiment, the detection mechanism 6 includes a valve position sensor 601 ; the valve position sensor 601 is connected to the housing 401 and the valve stem 403 , respectively, and the valve position sensor 601 is used to detect the relative position of the valve stem 403 and the housing 401 .

[0059] In the above embodiment, the valve position sensor 601 can adopt a distance sensor, the detection end of the valve position sensor 601 can be fixed on the housing 401, the valve position sensor 601 can be fixedly connected to the end of the channel, and the positioning end of the valve position sensor 601 can be fixed on the valve stem 403, or fixed on the rack 402. The position of the valve stem 403 or the rack 402 can be determined by the valve position sensor 601, and the opening state of the valve body 404 can be directly inferred by the position of the valve stem 403 and the rack 402. The driving member 1 can also determine whether it needs to continue driving the completed opening or closing through the electrical signal obtained by the valve position sensor 601.

[0060] In an optional embodiment, the detection mechanism 6 further includes an angle sensor 602 ; the angle sensor 602 is connected to the transmission mechanism 2 and the housing 401 , respectively, and the angle sensor 602 is used to detect the rotation angle of the transmission mechanism 2 relative to the housing 401 .

[0061] In the above embodiment, the angle sensor 602 can adopt an electromagnetic sensor. By providing a positioning end of the angle sensor 602 on the connecting sleeve 2012 and a detection end of the angle sensor 602 on the outer shell 401, the detection end detects the position information of the positioning rotation to determine the number of rotations of the connecting sleeve 2012, and the relative position of the rack 402 and the valve stem 403 can be known through the information in the valve position sensor 601, thereby determining whether the transmission shaft assembly 201 and the gear assembly 202 are tightly connected, that is, whether the protrusion on the first eccentric wheel 2014 and the convex shaft on the second eccentric wheel 2022 are tightly connected, thereby determining whether the valve body 404 is locked to avoid the generation of gaps in the valve body 404 and affecting the closing effect of the valve body 404.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wellhead cut-off valve control device, characterized in that: It includes a driving part, a transmission mechanism, a control mechanism and a shut-off valve; The driving member is connected to the transmission mechanism, the transmission mechanism is connected to the shut-off valve, and the driving member controls the opening and closing of the shut-off valve through the transmission mechanism; The control mechanism is connected to the driving member via an electrical signal, and the control mechanism is used to control the opening and closing of the driving member; The transmission mechanism includes a transmission shaft assembly and a gear assembly; The transmission shaft assembly is connected to the driving member, the transmission shaft assembly is in transmission connection with the gear assembly, the gear assembly is in transmission connection with the shut-off valve, and the driving member drives the shut-off valve to open and close through the transmission shaft assembly and the gear assembly; The transmission shaft assembly includes: a clutch, a connecting sleeve, a connecting wheel and a first eccentric wheel; The clutch is connected to the driving member, the connecting sleeve is sleeved on the clutch, and the connecting sleeve is frictionally connected to the clutch; The connecting wheel is connected to a side of the connecting sleeve away from the driving member, the first eccentric wheel is connected to a side of the connecting wheel away from the driving member, and the first eccentric wheel abuts against the gear assembly.

2. The wellhead cut-off valve control device according to claim 1, characterized in that: The gear assembly includes: a cam, a second eccentric wheel, a gear shaft, a gear ring and a flange; The cam is eccentrically arranged on the second eccentric wheel, the second eccentric wheel is connected to one end of the gear shaft, the gear ring is sleeved on the gear shaft, the end of the gear shaft away from the second eccentric wheel is inserted into the flange and rotatably connected to the flange, and the flange is fixed to the shut-off valve; The cam is connected to the second eccentric wheel, and the ring gear is transmission-connected to the shut-off valve.

3. The wellhead cut-off valve control device according to claim 1, characterized in that: The shut-off valve comprises a housing, a rack, a valve stem and a valve body; The rack, the valve stem and the valve body are arranged in the housing, the two ends of the valve stem are connected to the rack and the valve body respectively, and the rack, the valve stem and the valve body are slidably connected to the housing respectively; The rack is connected to the transmission mechanism, and the transmission mechanism drives the valve body to slide relative to the housing through the rack and the valve stem.

4. The wellhead cut-off valve control device according to claim 3, characterized in that: Also includes a manual mechanism; The manual mechanism is provided on the housing, one end of the manual mechanism extends into the housing and is transmission-connected to the rack, and the other end of the manual mechanism extends through the housing. The manual mechanism can drive the valve body through the rack and the valve stem.

5. The wellhead cut-off valve control device according to claim 4, characterized in that: The manual mechanism includes a reset gear, a reset shaft and a handle; The reset gear is engaged with the rack, the reset gear is connected to the reset shaft, the reset shaft is rotatably connected to the housing, and the handle is mounted on an end of the reset shaft away from the reset gear.

6. The wellhead cut-off valve control device according to claim 3, characterized in that: It also includes testing agencies; The detection mechanism is arranged in the housing, and is connected to the cut-off valve and the transmission mechanism respectively. The detection mechanism is used to detect the opening amplitude of the valve body and the rotation angle of the transmission mechanism.

7. The wellhead cut-off valve control device according to claim 6, characterized in that: The detection mechanism includes a valve position sensor; The valve position sensor is connected to the housing and the valve stem respectively, and is used to detect the relative position of the valve stem and the housing.

8. The wellhead cut-off valve control device according to claim 6, characterized in that: The detection mechanism also includes an angle sensor; The angle sensor is connected to the transmission mechanism and the housing respectively, and is used to detect the rotation angle of the transmission mechanism relative to the housing.

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