Switching device of ram blowout preventer

Abstract

The utility model belongs to the field of blowout preventers, and particularly relates to a switching device of a ram blowout preventer. In order to ensure that the amount of motion of a valve plate is equal to a set value, the utility model provides a switching device of a ram blowout preventer. The flashboard blowout preventer switching device comprises a rotary power source, a speed reducing mechanism and a supporting frame which is fixedly connected to the flashboard blowout preventer and used for supporting the rotary power source and the speed reducing mechanism, the supporting frame comprises a mounting plate and a clamp, the rotary power source is mounted on the mounting plate, and the clamp comprises a first clamping piece, a second clamping piece and a distance adjusting mechanism. The mounting plate is fixedly connected to the first clamping piece or integrally formed with the first clamping piece, and the distance adjusting mechanism is used for adjusting the distance between the two clamping pieces so that the first clamping piece and the second clamping piece can directly or indirectly clamp the ram blowout preventer. And the rotary power source, the speed reducing mechanism and the flashboard blowout preventer synchronously vibrate so as to ensure that the motion amount of the valve plate is a set value.

Description

Technical Field

[0001] This utility model belongs to the field of blowout preventers, and in particular relates to a gate blowout preventer switching device. Background Technology

[0002] Gate blowout preventers are well control devices commonly used during minor repairs of oil and water wells in oilfields. A gate blowout preventer consists of a housing and a gate assembly mounted on the housing. The gate assembly includes a gate, a gate shaft connected to the gate, and a lead screw threaded to the gate shaft. By rotating the lead screw, the two gates can be driven to move closer or further apart, thereby closing or opening the gate.

[0003] In one type of blowout preventer, there are two lead screws, one end of which is connected to a hexagonal prism. Two operators can use a special wrench to rotate the hexagonal prisms connected to the two lead screws to manually open and close the blowout preventer. In another type of blowout preventer (such as the SFZ18-21Z model), there is one lead screw, one end of which is connected to a handle. A single operator can open and close the blowout preventer by turning the handle. Of course, when there is only one lead screw, a hexagonal prism connected to the lead screw can also be used, and a special tool can be used to turn the lead screw by engaging the hexagonal prism.

[0004] To save manpower, Chinese utility model patent CN217632366U, authorized on October 21, 2022, discloses a remote automatic switching device for a wellhead blowout preventer. This device includes a hydraulic motor, a reducer, a reversing valve, and a control switch. The output end of the hydraulic motor is connected to the input end of the reducer, and the output end of the reducer is connected to a lead screw. The reversing valve is connected to the hydraulic motor, and the control switch controls the working state of the reversing valve, thereby controlling the hydraulic motor to rotate forward, reverse, or remain stationary. The reducer is a known gear reducer or worm gear reducer, and the output gear or output worm of the reducer is mounted on the lead screw. When used with gate blowout preventers having different numbers of lead screws, each lead screw is equipped with a hydraulic motor and a reducer.

[0005] The aforementioned patent does not disclose how the speed reducer and hydraulic motor are installed. In actual use, to ensure the normal operation of the speed reducer, the output gear and output worm cannot be used to support the weight of the speed reducer and hydraulic motor. Therefore, those skilled in the art would readily conceive of placing the speed reducer housing in contact with the ground, using the ground to support the speed reducer and hydraulic motor.

[0006] In actual production, the impact of high-pressure oil and gas can cause slight shaking of the wellhead cross-connector. This can lead to slight shaking of the blowout preventer installed on the cross-connector, which in turn causes slight shaking of the output gear or output turbine. Since the reducer is grounded, the gear meshing with the output gear (or the worm meshing with the output turbine) will not vibrate. Ultimately, this can cause the output gear and the corresponding gear (the gear meshing with the output gear) to collide or disengage, or the output turbine and the corresponding worm (the worm meshing with the output turbine) to collide or disengage.

[0007] When the above situation occurs, on the one hand, it will affect the life of the reducer. On the other hand, when the output gear and the corresponding gear are disengaged, the corresponding gear will spin freely (when the output turbine is disengaged from the corresponding worm, the corresponding worm will also spin freely). This results in a small amount of rotation of the output gear (output turbine), which in turn results in a small amount of rotation of the lead screw connected to the output gear (output turbine). Ultimately, this leads to the valve plate not being fully opened or fully closed, causing a safety accident. Utility Model Content

[0008] The purpose of this utility model is to provide a gate blowout preventer switch device to solve the technical problem that when the rotation of the lead screw is less than the set value during the vibration of the wellhead four-way valve, the gate is not fully opened or closed.

[0009] To achieve the above objectives, the technical solution of the gate blowout preventer switching device provided by this utility model is as follows:

[0010] A gate blowout preventer switching device includes a rotary power source and a reduction mechanism. The rotary power source is drivenly connected to the input end of the reduction mechanism, and the output end of the reduction mechanism is drivenly connected to the lead screw of the gate blowout preventer. The device also includes a support frame fixedly connected to the gate blowout preventer and supporting the rotary power source and the reduction mechanism. The support frame includes a mounting plate and a clamp. The rotary power source is mounted on the mounting plate. The clamp includes a first clamping member, a second clamping member, and a spacing adjustment mechanism. The mounting plate is fixedly connected to the first clamping member or integrally formed with the first clamping member. The spacing adjustment mechanism is used to adjust the spacing between the two clamping members so that the first and second clamping members can directly or indirectly clamp the gate blowout preventer.

[0011] Furthermore, there are two rotary power sources and two reduction mechanisms. The two rotary power sources are respectively connected to the input ends of the two reduction mechanisms, and the output ends of the two reduction mechanisms are respectively connected to the two lead screws of the gate blowout preventer. There are also two mounting plates. The two rotary power sources are respectively mounted on different mounting plates, and the first clamping member is used to connect the two mounting plates.

[0012] Furthermore, the first clamping member has a clamping surface on the side near the second clamping member. The clamping surface is used to press against the gate blowout preventer so that the first clamping member and the second clamping member can directly clamp the gate blowout preventer.

[0013] Furthermore, the second clamping member is provided with an arcuate groove for matching the cylinder of the gate blowout preventer.

[0014] Furthermore, the spacing adjustment mechanism is a lead screw adjustment mechanism, which includes a bolt and a nut. One of the bolt head and the nut is located on the side of the first clamping member away from the second clamping member, and the other is located on the side of the second clamping member away from the first clamping member.

[0015] Furthermore, two nuts constituting a double-nut locking structure are connected to the same bolt. The first clamping member is provided with a threaded hole, and a set screw is threaded into the threaded hole. One end of the set screw is used to press against the gate blowout preventer, so as to indirectly clamp the gate blowout preventer with the first clamping member and the second clamping member.

[0016] Furthermore, the reduction mechanism is a chain and sprocket drive mechanism, which includes a driving sprocket, a transmission component containing a driven sprocket, and a chain for drivingly connecting the driving sprocket and the driven sprocket. The driving sprocket is mounted on the output end of the rotating power source. The transmission component includes a polygonal prism hole, the shape of which is matched with the polygonal prism connected to one end of the lead screw in the blowout preventer, so as to drively connect the transmission component and the lead screw.

[0017] Furthermore, the transmission component also includes an emergency polygonal prism, which is positioned at the end of the transmission component away from the lead screw.

[0018] Furthermore, the reduction mechanism is a belt drive mechanism, which includes a driving pulley, a transmission component containing a driven pulley, and a belt for drivingly connecting the driving pulley and the driven pulley. The driving pulley is mounted on the output end of the rotating power source, and the transmission component includes a polygonal hole. The shape of the polygonal hole is used to match the polygonal prism connected to one end of the lead screw in the blowout preventer, so as to drively connect the transmission component and the lead screw.

[0019] Furthermore, the gate blowout preventer switch device also includes a control module, and the output end of the rotary power source is connected to a rotary encoder. The rotary encoder is connected to the control module for communication. The control module is used to stop the rotary power source from rotating when the rotary encoder rotates a set number of revolutions.

[0020] The beneficial effects of the gate blowout preventer switching device provided by this utility model are as follows: This utility model is an improved invention. The core difference between this utility model and the prior art is that in this utility model, a support frame is used to support the rotating power source and the reduction mechanism, and the clamp of the support frame is held on the gate blowout preventer. When the gate blowout preventer vibrates, the support frame drives the rotating power source and the reduction mechanism to vibrate synchronously, so as to ensure that the rotation of the lead screw is equal to the set value, that is, to ensure that the movement of the valve plate is the set value.

[0021] During installation, the distance between the first and second clamping parts is adjusted by the spacing adjustment mechanism so that the clamps can clamp the gate blowout preventer. The gate blowout preventer is then used to fix the support frame. On this basis, the support frame supports the rotary power source and the reduction mechanism. When the gate blowout preventer vibrates, the support frame drives the rotary power source and the reduction mechanism to vibrate synchronously to ensure that the rotation of the lead screw is equal to the set value.

[0022] After installation, the gate can be opened or closed by rotating the power source in both directions. Attached Figure Description

[0023] Figure 1 This is a top view of the gate blowout preventer switch device of this utility model in use;

[0024] Figure 2 This is a left view of the gate blowout preventer switch device of this utility model in use;

[0025] Figure 3 This is a front view of the gate blowout preventer switch device of this utility model in use;

[0026] Figure 4 for Figure 1 A structural schematic diagram of the central support frame at one angle;

[0027] Figure 5 for Figure 1 A structural diagram of the central support frame from another angle;

[0028] Figure 6 This is a left view of another gate blowout preventer switch device of this utility model in use.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Gate valve blowout preventer switch device; 1-1. Cylinder; 1-2. Rectangular part; 2. Connecting bolt; 3. First clamping component; 4. Set screw; 5. Hydraulic motor; 6. Drive sprocket; 7. Rotary encoder; 8. Mounting plate; 9. Chain; 10. Driven sprocket; 11. Emergency polygonal prism; 12. Nut; 13. Second clamping component. Detailed Implementation

[0031] To address the problems in the background technology, the core inventive concept of this utility model is to make the rotating power source, the deceleration mechanism and the gate blowout preventer vibrate synchronously to ensure that the rotation amount of the lead screw is the set value, that is, to ensure that the movement amount of the valve plate is the set value.

[0032] The following describes in further detail the gate blowout preventer switch device provided by this utility model with reference to the embodiments.

[0033] like Figures 1-6 As shown, in a basic implementation, the gate blowout preventer switching device 1 includes a rotary power source and a reduction mechanism. The rotary power source is drivenly connected to the input end of the reduction mechanism, and the output end of the reduction mechanism is drivenly connected to the lead screw of the gate blowout preventer. The gate blowout preventer switching device 1 also includes a support frame fixedly connected to the gate blowout preventer and used to support the rotary power source and the reduction mechanism. The support frame includes a mounting plate 8 and a clamp. The rotary power source is mounted on the mounting plate 8. The clamp includes a first clamping member 3, a second clamping member 13, and a spacing adjustment mechanism. The mounting plate 8 is fixedly connected to the first clamping member 3 by means of fastener connection or welding connection, or the mounting plate 8 and the first clamping member 3 are integrally formed. The spacing adjustment mechanism is used to adjust the spacing between the two clamping members so that the first clamping member 3 and the second clamping member 13 can directly or indirectly clamp the gate blowout preventer.

[0034] In different embodiments, the clamping components (including the first clamping component 3 and the second clamping component 13) can be clamping plates, clamping blocks, or other structures; the rotational power source can be a hydraulic motor 5, a pneumatic motor, or an explosion-proof servo motor, etc. Since there are flammable and explosive gases (associated gas from the oilfield) at the wellhead, it is necessary to avoid the occurrence of electric sparks, so the motor must be an explosion-proof motor; similarly, the spacing adjustment mechanism can be a hydraulic cylinder, a pneumatic cylinder, an explosion-proof electric telescopic rod, etc., or the spacing adjustment mechanism can be a screw adjustment mechanism, etc., so that the first clamping component 3 and the second clamping component 13 clamp the gate blowout preventer; the reduction mechanism can be a chain and sprocket drive mechanism, a belt drive mechanism, a gear drive mechanism, or a worm gear drive mechanism, etc.

[0035] When the rotational power source is a hydraulic motor 5, the hydraulic station and directional valve that already exist at the wellhead can be used to supply fluid to the hydraulic motor 5.

[0036] During installation, the distance between the first clamping member 3 and the second clamping member 13 is adjusted by the spacing adjustment mechanism so that the clamps can clamp the gate blowout preventer. The gate blowout preventer is then used to fix the support frame. On this basis, the support frame supports the rotary power source and the deceleration mechanism. When the gate blowout preventer vibrates, the support frame drives the rotary power source and the deceleration mechanism to vibrate synchronously to ensure that the rotation of the lead screw is equal to the set value, that is, to ensure that the movement of the valve plate is the set value.

[0037] The following section provides a detailed description of the gate blowout preventer switching device 1 for gate blowout preventers with different numbers of lead screws.

[0038] In one embodiment, such as Figures 1-6 As shown, the gate blowout preventer has two lead screws, two rotary power sources and two reduction mechanisms. The two rotary power sources are respectively connected to the input ends of the two reduction mechanisms, and the output ends of the two reduction mechanisms are respectively connected to the two lead screws of the gate blowout preventer. There are also two mounting plates 8. The two rotary power sources are respectively mounted on different mounting plates 8. The first clamping member 3 is used to connect the two mounting plates 8.

[0039] In use, the two rotating power sources rotate synchronously to open or close the gate.

[0040] In other embodiments, referring to the gate blowout preventer with model number SFZ18-21Z, the gate blowout preventer has only one lead screw, and there is only one rotation power source and one reduction mechanism.

[0041] The following section describes the gate blowout preventer switch device 1 in detail, focusing on the way the clamping component holds the gate blowout preventer.

[0042] In one embodiment, such as Figures 1-6 As shown, the first clamping member 3 is provided with a threaded hole, and a set screw 4 is threadedly connected inside the threaded hole. One end of the set screw 4 is used to press against the gate blowout preventer so as to indirectly clamp the gate blowout preventer between the first clamping member 3 and the second clamping member 13.

[0043] In other embodiments, refer to Figures 1-6 As shown, the first clamping member 3 has a clamping surface on the side near the second clamping member 13. The clamping surface is used to press against the gate blowout preventer so that the first clamping member 3 and the second clamping member 13 can directly clamp the gate blowout preventer. The structure is simple.

[0044] In the prior art, the housing of the gate blowout preventer includes a cuboid portion 1-2 and a cylinder 1-1 connected to opposite sides (or one side) of the cuboid portion 1-2.

[0045] In one embodiment, such as Figures 1-5 As shown, the second clamping member 13 is provided with an arc-shaped groove for matching the cylinder 1-1 of the gate blowout preventer. The arc-shaped groove and the cylinder 1-1 stop in the vertical direction to limit the position of the clamp in the vertical direction. The structure is simple.

[0046] The second clamping member 13 is a clamp, clamping plate or clamping block, and the clamp, clamping plate or clamping block is provided with an arc groove. The first clamping member 3 is a square tube, clamping plate or clamping block.

[0047] In other embodiments, such as Figure 6As shown, the second clamping member 13 is a flat plate, and the surface of the flat plate near the cuboid portion 1-2 forms a contact plate surface that contacts the cuboid portion 1-2. The contact plate surface is a rough surface, and there is friction between the contact plate surface and the cuboid portion 1-2 to prevent the support frame from falling off the cuboid portion 1-2.

[0048] In other embodiments, a friction pad may be provided between the second clamping member 13 (flat plate) and the cuboid portion 1-2 to increase friction and prevent the support frame from falling off the cuboid portion 1-2.

[0049] The friction pad and the second clamping member 13 can be fixedly connected by means of adhesive bonding or other methods.

[0050] The following section provides a detailed description of the gate blowout preventer switch device 1, focusing on the spacing adjustment mechanism.

[0051] In one embodiment, such as Figures 1-6 As shown, the spacing adjustment mechanism is a screw adjustment mechanism, which includes a bolt (i.e., connecting bolt 2) and a nut 12. One of the bolt head of the bolt (i.e., connecting bolt 2) and the nut 12 is located on the side of the first clamping member 3 away from the second clamping member 13, and the other is located on the side of the second clamping member 13 away from the first clamping member 3.

[0052] In other embodiments, the lead screw adjustment mechanism may also include a double-ended screw and nuts 12 connected to both ends of the double-ended screw, wherein a portion of the nuts 12 is located on the side of the first clamping member 3 away from the second clamping member 13, and another portion is located on the side of the second clamping member 13 away from the first clamping member 3.

[0053] In the above embodiment, in order to prevent the nut 12 from loosening, two nuts 12 are connected on the same connecting bolt 2 (or the same side of the double-ended screw), and the threads on the two nuts 12 are opposite to form a double nut locking structure, thereby preventing the nut 12 from loosening.

[0054] At this point, when adjusting the distance between the first clamping member 3 and the second clamping member 13, it is necessary to rotate each nut 12 in the double nut locking structure in sequence, which is quite troublesome.

[0055] Preferably, in one embodiment, a set screw 4 is connected to the first clamping member 3. By turning the set screw 4, the set screw 4 and the second clamping member 13 can clamp the gate blowout preventer, thereby realizing the indirect clamping of the gate blowout preventer by the first clamping member 3 and the second clamping member 13, which is convenient to operate.

[0056] In other embodiments, when the spacing adjustment mechanism is a hydraulic cylinder, pneumatic cylinder, or explosion-proof electric push rod, the base and output end of the spacing adjustment mechanism can be fixedly connected to the two clamping members respectively, so that the spacing adjustment mechanism can drive the two clamping members to move closer or further apart.

[0057] The following section provides a detailed description of the gate blowout preventer switch device 1, which is based on the deceleration mechanism.

[0058] In one embodiment, such as Figures 1-6 As shown, the reduction mechanism is a chain and sprocket drive mechanism. The chain and sprocket drive mechanism includes a driving sprocket 6, a transmission component including a driven sprocket 10, and a chain 9 for drivingly connecting the driving sprocket 6 and the driven sprocket 10. The driving sprocket 6 is installed on the output end of the rotating power source. The transmission component includes a polygonal prism hole. The shape of the polygonal prism hole is used to match the polygonal prism (e.g., a square prism, a hexagonal prism, or a dodecagonal prism) connected to one end of the lead screw in the gate blowout preventer, so as to enable the transmission component to drively connect with the lead screw. The structure is simple and reliable.

[0059] The rotation axes of the driving sprocket 6 and the driven sprocket 10 are parallel, that is, the rotation axes of the rotation power source and the lead screw are parallel; the lead screw has a threaded hole, and the transmission component has a bolt hole. After the bolt passes through the bolt hole, it is threadedly connected to the threaded hole on the lead screw to fix the transmission component on the lead screw.

[0060] Of course, in other embodiments, the size of the prism hole can be slightly smaller than the size of the prism, so that the transmission component is interference-fitted with the prism, thereby fixing the transmission component; or, the transmission component and the lead screw can be welded together. In this case, it is best to complete the welding work before the gate blowout preventer is installed to avoid hot work at the wellhead. If hot work is required at the wellhead (i.e., the gate blowout preventer has been installed), it is necessary to operate in accordance with the specifications required for hot work in the art to avoid safety accidents.

[0061] In other embodiments, the reduction mechanism is a belt drive mechanism, which includes a driving pulley, a transmission component containing a driven pulley, and a belt for drivingly connecting the driving pulley and the driven pulley. The driving pulley is mounted on the output end of the rotating power source. The transmission component includes a polygonal prism hole, the shape of which is matched to the polygonal prism connected to one end of the lead screw in the blowout preventer, so as to drive the transmission component and the lead screw. The structure is simple and reliable. The method of fixing the transmission component will not be described in detail here.

[0062] Of course, in other embodiments, the reduction mechanism can also be a gear transmission mechanism and a worm gear transmission mechanism, in which case the transmission component includes a corresponding driven gear or driven worm wheel.

[0063] Of course, in other embodiments, the driven sprocket 10, driven pulley, driven gear, and driven worm gear can also be directly mounted on the lead screw by means of interference fit or other methods.

[0064] In the above embodiments, the screw can only be driven to rotate by a rotary power source. During daily use, the rotary power source needs to be checked and maintained regularly to prevent it from suddenly failing when the downhole pressure is too high, which would prevent the well from being shut down.

[0065] In one embodiment, the transmission component may also include other structures besides the driven sprocket 10, driven pulley, driven gear, and driven worm gear, such as an emergency polygonal prism 11, which is used to be located at the end of the transmission component away from the lead screw.

[0066] If the rotary power source is suddenly damaged due to long-term lack of maintenance by the staff (i.e., long-term violation of operating procedures by the staff) when the downhole pressure is too high, the on-site personnel can also use special tools to turn the emergency polygonal prism 11 to close the valve plate, thereby avoiding a blowout.

[0067] The following section will elaborate on the control method of the gate blowout preventer switch device 1.

[0068] In one embodiment, the rotary power source has a forward rotation gear, a reverse rotation gear, and a stop gear. The operator manually controls the rotary power source to switch to the forward rotation gear (or the reverse rotation gear), and after waiting for a period of time, switches the rotary power source to the stop gear.

[0069] Taking hydraulic motor 5 as an example, the above gears can be introduced. By controlling the opening and closing of the reversing valve, hydraulic motor 5 can be made to rotate forward (corresponding to forward gear), rotate in reverse (corresponding to reverse gear), or stop (corresponding to stop gear).

[0070] In this operating mode, when the valve plate is fully open or fully closed, the screw cannot continue to rotate, thus preventing the rotary power source from rotating. Therefore, when the operator observes that the rotary power source is not rotating, they can switch the rotary power source to the stop position.

[0071] However, in the above operating method, the opening degree of the valve plate cannot be controlled; it can only be made to fully open or fully close the valve plate.

[0072] In one embodiment, such as Figures 1-6 As shown, the gate blowout preventer switch device 1 also includes a control module (e.g., a programmable logic controller). The output end of the rotary power source is also connected to a rotary encoder 7. The rotary encoder 7 is communicatively connected to the control module. The control module is used to stop the rotary power source from rotating when the rotary encoder 7 rotates a set number of revolutions.

[0073] The control module can control the number of rotations of the rotary power source, which in turn controls the number of rotations of the drive sprocket 6 (drive pulley, drive gear, or worm), thereby controlling the number of rotations of the lead screw connected to the driven sprocket 10 (driven pulley, driven gear, or driven worm), and thus controlling the opening degree of the gate.

[0074] Meanwhile, the rotary encoder 7 can also monitor the status of the gate. When the gate is fully closed, the control module can communicate with other devices to prevent other devices from performing the lifting operation of the pipe column, prevent workers from lifting the pipe column in violation of regulations, and prevent safety hazards.

[0075] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some technical features, or organically combine different specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gate blowout preventer switching device, comprising a rotary power source and a reduction mechanism, wherein the rotary power source is drive-connected to the input end of the reduction mechanism, and the output end of the reduction mechanism is drive-connected to the lead screw of the gate blowout preventer, characterized in that, It also includes a support frame that is fixedly connected to the gate blowout preventer and is used to support the rotary power source and the deceleration mechanism. The support frame includes a mounting plate and a clamp. The rotary power source is mounted on the mounting plate. The clamp includes a first clamping member, a second clamping member, and a spacing adjustment mechanism. The mounting plate is fixedly connected to the first clamping member or integrally formed with the first clamping member. The spacing adjustment mechanism is used to adjust the spacing between the two clamping members so that the first clamping member and the second clamping member can directly or indirectly clamp the gate blowout preventer.

2. The gate blowout preventer switching device as described in claim 1, characterized in that, There are two rotary power sources and two reduction mechanisms. The two rotary power sources are respectively connected to the input ends of the two reduction mechanisms. The output ends of the two reduction mechanisms are respectively connected to the two lead screws of the gate blowout preventer. There are also two mounting plates. The two rotary power sources are respectively mounted on different mounting plates. The first clamping member is used to connect the two mounting plates.

3. The gate blowout preventer switching device as described in claim 1 or 2, characterized in that, The first clamping member has a clamping surface on the side near the second clamping member. The clamping surface is used to press against the gate blowout preventer so that the first clamping member and the second clamping member can directly clamp the gate blowout preventer.

4. The gate blowout preventer switching device as described in claim 1 or 2, characterized in that, The second clamping member is provided with an arc-shaped groove for matching the cylinder of the gate blowout preventer.

5. The gate blowout preventer switching device as described in claim 1 or 2, characterized in that, The spacing adjustment mechanism is a screw adjustment mechanism, which includes a bolt and a nut. One of the bolt head and the nut is located on the side of the first clamping member away from the second clamping member, and the other is located on the side of the second clamping member away from the first clamping member.

6. The gate blowout preventer switching device as described in claim 5, characterized in that, Two nuts forming a double-nut locking structure are connected to the same bolt. The first clamping member is provided with a threaded hole, and a set screw is connected to the threaded hole. One end of the set screw is used to press against the gate blowout preventer so that the first clamping member and the second clamping member can indirectly clamp the gate blowout preventer.

7. The gate blowout preventer switching device as described in claim 1 or 2, characterized in that, The reduction mechanism is a chain and sprocket drive mechanism, which includes a driving sprocket, a transmission component containing a driven sprocket, and a chain for drivingly connecting the driving sprocket and the driven sprocket. The driving sprocket is mounted on the output end of the rotating power source. The transmission component includes a polygonal prism hole, the shape of which is matched with the polygonal prism connected to one end of the lead screw in the blowout preventer, so as to drively connect the transmission component and the lead screw.

8. The gate blowout preventer switching device as described in claim 7, characterized in that, The transmission component also includes an emergency polygonal prism, which is used to be located at the end of the transmission component away from the lead screw.

9. The gate blowout preventer switching device as described in claim 1 or 2, characterized in that, The reduction mechanism is a belt drive mechanism, which includes a driving pulley, a transmission component containing a driven pulley, and a belt for drivingly connecting the driving pulley and the driven pulley. The driving pulley is installed on the output end of the rotating power source. The transmission component includes a polygonal prism hole, the shape of which is matched with the polygonal prism connected to one end of the lead screw in the blowout preventer, so as to drively connect the transmission component and the lead screw.

10. The gate blowout preventer switching device as described in claim 1 or 2, characterized in that, The gate blowout preventer switch also includes a control module. The output end of the rotary power source is connected to a rotary encoder. The rotary encoder is connected to the control module for communication. The control module is used to stop the rotary power source from rotating when the rotary encoder rotates a set number of revolutions.

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