A remote automatic locking system for gate blowout preventers

Abstract

This invention discloses a remote automatic locking system for a gate blowout preventer, comprising a shaft seat, the first end of which is bolted to the gate blowout preventer and corresponds to the gate shaft; the inner wall of which has an internal thread; a reduction mechanism, comprising a housing and a hollow output shaft; one side wall of the housing is fixed to the second end of the shaft seat; the hollow output shaft is rotatably connected inside the housing and its axis corresponds to the gate shaft; a drive mechanism, fixed to the outer wall of the housing and its drive shaft is drivingly connected to the hollow output shaft; and a locking mechanism, comprising a torque slide rod and a locking shaft; the torque slide rod is assembled in the hollow cavity of the hollow output shaft and can rotate synchronously and move linearly with the hollow output shaft; the locking shaft is assembled in the shaft seat and coaxial with the torque slide rod, and its outer wall has an external thread that meshes with the internal thread; one end of the locking shaft is fixed to the torque slide rod, and the other end can abut against the gate shaft. This invention solves the problems of high labor intensity, low operating efficiency, and poor personnel safety in existing blowout preventer locking devices.

Description

Technical Field

[0001] This invention relates to the field of oil drilling equipment technology, and more specifically to a remote automatic locking system for a gate blowout preventer. Background Technology

[0002] In oil drilling, as a critical well control safety device, the gate blowout preventer (BOP) must mechanically lock the gate shaft after it has closed and pressure-sealed the wellhead. This step is crucial because it prevents the closed gate shaft from retracting under prolonged pressure or unexpected pressure leakage (loss of pressure) in the hydraulic cylinders on both sides of the BOP, which could lead to seal failure and serious safety accidents.

[0003] Currently, conventional gate blowout preventers (BOPs) commonly use a manual mechanical locking device, typically a locking mechanism installed inside or at the rear of the BOP's hydraulic cylinder. This mechanism mainly consists of a locking shaft seat and a locking shaft that mates with it. Its working principle is as follows: after the gate is closed, the operator needs to go to the BOP located on either side of the wellhead platform and manually rotate the handwheel connected to the locking shaft to drive the locking shaft forward in a spiral feed until its end firmly presses against the gate shaft, thus achieving mechanical self-locking.

[0004] The advantage of this traditional locking method lies in its simple structure and high reliability of mechanical locking. However, its disadvantages are also very prominent, mainly in the following aspects: high labor intensity: the locking operation relies entirely on manual rotation of the handwheel, which consumes a great deal of physical strength for operators when large locking torque is required or frequent operation is needed; low work efficiency: the manual operation process is slow, especially in operating environments such as deep-sea drilling and high-pressure wells where the well shut-in speed requirement is extremely high, the manual locking steps will significantly extend non-productive time and affect the overall work efficiency; poor work safety: operators must be directly in the high-risk wellhead area to work. This area not only has risks such as high-pressure fluid leakage and falling objects, but the environment is even more complex and dangerous in emergency well shut-in situations. Personnel operating close to the equipment face a direct threat to their personal safety.

[0005] Therefore, how to provide a locking system that can be remotely controlled and automatically executed has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of this, the present invention provides a remote automatic locking system for gate blowout preventers, which solves the problems of high labor intensity, low operating efficiency and poor personnel safety of existing blowout preventer locking devices.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A remote automatic locking system for a gate blowout preventer includes: A bearing seat, the first end of which is bolted to the gate blowout preventer and corresponds to the gate shaft; the inner wall of the bearing seat is provided with internal threads; A speed reduction mechanism, comprising a housing and a hollow output shaft; one side wall of the housing is fixed to the second end of the shaft seat; the hollow output shaft is rotatably connected inside the housing and its axis corresponds to the gate shaft; A drive mechanism, which is fixed to the outer wall of the housing and whose drive shaft is connected to the hollow output shaft; A locking mechanism includes a torque slide bar and a locking shaft. The torque slide bar is assembled in the hollow cavity of the hollow output shaft and can rotate synchronously and move linearly with the hollow output shaft. The locking shaft is assembled in the shaft seat and is coaxial with the torque slide bar, and its outer wall is provided with an external thread that meshes with the internal thread. One end of the locking shaft is fixed to the torque slide bar, and the other end can abut against the gate shaft.

[0009] The beneficial effects of the technical solution of this invention are that the hollow output shaft is driven to rotate by the drive mechanism. During the rotation of the hollow output shaft, the torque slide bar will rotate synchronously. Since the torque slide bar is fixedly connected to the locking shaft and the locking shaft is internally threaded to the shaft seat, the rotation of the hollow output shaft can drive the locking shaft to rotate. Under the action of the thread, the torque slide bar and the locking shaft move linearly synchronously. When the locking shaft contacts the gate shaft, the mechanical locking of the gate shaft can be achieved without human intervention, reducing personnel input and avoiding threats to personal safety. Moreover, the degree of automation is high, which can effectively improve the work efficiency.

[0010] Preferably, the length of the torque slide bar is greater than the locking stroke of the locking shaft; the cross-section of the torque slide bar is a non-circular polygon, and the shape of the hollow cavity is adapted to the cross-sectional shape of the torque slide bar. The non-circular polygonal structure of the torque slide bar and the hollow cavity of the hollow output shaft ensures that the torque slide bar rotates with the hollow output shaft while simultaneously allowing linear movement under the action of the threaded connection between the locking shaft and the bearing seat, preventing the torque slide bar from spinning freely within the hollow output shaft and ensuring effective torque transmission.

[0011] Preferably, the locking mechanism further includes a connecting sleeve, the cavity shape of which is the same as the non-circular polygon; the cross-section of the locking shaft near the torque slide is the same non-circular polygon cross-section as the torque slide; the two ends of the connecting sleeve are respectively fitted onto the opposite ends of the torque slide and the locking shaft; the outer wall of the connecting sleeve has multiple bolt holes, and the threaded end of the locking bolt can be screwed into the bolt hole and bolted to the torque slide or the locking shaft. The connecting sleeve provides a transition connection between the torque slide and the locking shaft, ensuring torque transmission.

[0012] Preferably, one end of the hollow cavity near the locking shaft is a non-circular polygonal cavity adapted to the torque slide bar, and the other end is a circular cavity; the cross-section of the circular cavity is larger than the cross-section of the non-circular polygonal cavity. This facilitates the installation of the torque slide bar within the hollow output shaft.

[0013] Preferably, the bearing includes a cylinder and a bearing flange. The bearing flange is fixed to the first end of the cylinder and bolted to the gate blowout preventer. The opposite side walls of the housing have through holes corresponding to the inner cavity of the cylinder. The torque slide rod passes through the through holes. The cylinder shape is adapted to the locking shaft, and the bearing flange facilitates the bolt connection between the bearing and the gate blowout preventer.

[0014] Preferably, it also includes a connector, which is fixed to the second end of the cylinder and bolted to the shell. The connector enables the connection between the cylinder and the shell.

[0015] Preferably, the connector is a connecting flange or a retaining ring.

[0016] Preferably, the reduction mechanism further includes an input shaft and a transmission component. The input shaft is rotatably connected within the housing, and its axis is perpendicular to the axis of the hollow output shaft. The transmission component is installed within the housing and positioned between the input shaft and the hollow output shaft to transmit torque. The drive shaft of the drive mechanism is drively connected to the input shaft. The drive shaft of the drive mechanism enables the rotation of the input shaft, and the reduction and torque amplification are achieved through the transmission component, ensuring that the hollow output shaft has sufficient torque transmission.

[0017] Preferably, it also includes a handwheel; the handwheel is suspended from the side wall of the housing away from the drive mechanism via a disconnect mechanism. When the drive mechanism fails, the handwheel connects to the input shaft to manually lock the gate shaft. Manual locking can be achieved via the handwheel after a system failure, ensuring the reliability of the locking system.

[0018] Preferably, it also includes a control system, which includes a human-machine interface, a locking / unlocking control unit, a fault protection unit, a drive control unit, a position calibration unit, and a control logic unit; The human-machine interface is used to set the number of locking turns and the locking / unlocking position of the locking shaft, and at the same time displays the current position, number of locking turns, locking or unlocking status and fault status of the locking shaft. The locking / unlocking control unit performs remote locking and unlocking operations; The fault protection unit is used for phase loss, overload, overheating or short circuit protection. The drive control unit is used to control the operation of the drive mechanism; The position calibration unit performs power outage memory; The control logic unit is a control assembly used to receive and transmit control signals.

[0019] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a remote automatic locking system for a gate blowout preventer, which can complete the mechanical locking operation of closing and sealing the blowout preventer through remote operation, thereby improving work efficiency and safety. It provides a simple and efficient solution to the problems of high labor intensity and low safety of existing manual locking devices for blowout preventers. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the locking system structure provided by the present invention; Figure 2 A cross-sectional view of the locking system provided by the present invention; Figure 3 This is a schematic diagram of the connecting flange structure provided by the present invention; Figure 4 This is a schematic diagram of the retaining ring structure provided by the present invention; Figure 5 This is a schematic diagram of a half-section of the retaining ring provided by the present invention; Figure 6 This is a schematic diagram of the connecting sleeve structure provided by the present invention; Figure 7 Axial view of the torque slide bar provided by the present invention; Figure 8 A cross-sectional view of the hollow output shaft provided by the present invention; Figure 9 This is a schematic diagram of the control system layout provided by the present invention; Figure 10 This is a schematic diagram of the installation structure of the locking system provided by the present invention on the gate blowout preventer.

[0022] The components are as follows: 1-shaft seat; 11-cylinder body; 12-shaft seat flange; 2-reduction mechanism; 21-housing shell; 22-hollow output shaft; 221-circular cavity; 222-non-circular polygonal cavity; 23-input shaft; 24-transmission component; 25-handwheel; 26-shelter; 3-connector; 31-ring plate; 32-large ring cavity; 33-small ring cavity; 4-locking mechanism; 41-torque slide bar; 42-locking shaft; 43-connecting sleeve; 44-bolt hole; 5-drive mechanism; 6-control system; 61-human-machine interface; 62-locking and unlocking control unit; 63-fault protection unit; 64-control logic unit; 65-drive control unit; 66-position calibration unit. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Participate in the attached Figure 1 To be continued Figure 10 To address the issues of low safety and high labor intensity associated with manual locking of existing blowout preventers, this invention discloses a remote automatic locking system for a gate blowout preventer, comprising a bearing seat 1, a reduction mechanism 2, a drive mechanism 5, and a locking mechanism 4. The first end of the bearing seat 1 is bolted to the gate blowout preventer 7 and corresponds to the gate shaft. The inner wall of the bearing seat 1 has an internal thread. The reduction mechanism 2 includes a housing 21 and a hollow output shaft 22. One side wall of the housing 21 is fixed to the second end of the bearing seat 1. The hollow output shaft 22 is rotatably connected within the housing 21, and its axis... Corresponding to the gate shaft; the drive mechanism 5 is fixed on the outer wall of the housing 21 and its drive shaft is connected to the hollow output shaft 22; the locking mechanism 4 includes a torque slide rod 41 and a locking shaft 42; the torque slide rod 41 is assembled in the hollow cavity of the hollow output shaft 22, and the torque slide rod 41 can rotate synchronously with the hollow output shaft 22 and move linearly; the locking shaft 42 is assembled in the shaft seat 1 and is coaxial with the torque slide rod 41, and its outer wall is provided with an external thread that meshes with the internal thread; one end of the locking shaft 42 is fixed to the torque slide rod 41, and the other end can abut against the gate shaft.

[0025] In this embodiment, the length of the torque slide bar 41 is greater than the locking stroke of the locking shaft 42, ensuring that the torque slide bar 41 can transmit torque to the locking shaft 42 while rotating with the hollow output shaft 41, thereby driving the locking shaft 42 to mechanically lock the gate shaft. The cross-section of the torque slide bar 41 is a non-circular polygon, and the shape of the hollow cavity is adapted to the cross-sectional shape of the torque slide bar 41. The non-circular polygon can be a square, hexagon, involute spline, or other structures, which facilitates driving the locking shaft 42 to rotate and advance spirally, while preventing the torque slide bar 41 from spinning freely within the hollow output shaft 42.

[0026] In other specific embodiments, such as Figure 8 As shown, one end of the hollow cavity near the locking shaft 42 is a non-circular polygonal cavity 222 adapted to the torque slide bar 41, and the other end is a circular cavity 221; the cross-section of the circular cavity 221 is larger than the cross-section of the non-circular polygonal cavity 222. The hollow cavity is divided into two parts, one with a larger circular cross-section and the other with a smaller non-circular polygonal cross-section. The circular and non-circular polygonal cross-sections of the hollow cavity are in the form of circumscribed circles, which facilitates the insertion of the torque slide bar 41 into the hollow cavity of the hollow output shaft 22.

[0027] To further optimize the above technical solution and ensure effective connection and torque transmission between the non-circular, multi-deformation structure torque slide 41 and the locking shaft 42, such as... Figure 6 As shown, the cavity shape of the connecting sleeve 43 is the same as that of a non-circular polygon; the cross section of the locking shaft 42 near the torque slide bar 41 is the same as that of the torque slide bar 41; the two ends of the connecting sleeve 43 are respectively sleeved on the opposite ends of the torque slide bar 41 and the locking shaft 42; the outer wall of the connecting sleeve 43 is provided with a plurality of bolt holes 44, and the threaded end of the locking bolt can be screwed into the bolt hole 44 and bolted to the torque slide bar 41 or the locking shaft 42.

[0028] The outer wall of the connecting sleeve is circular, but its cavity is a non-circular polygon adapted to the torque slide bar. In order to ensure effective torque transmission, the end of the locking shaft near the torque slide bar is designed as a non-circular polygonal mechanism with the same torque slide bar, while the rest is circular. This design can ensure effective connection between the connecting sleeve and the locking shaft, and also ensure threaded connection between the locking shaft and the inner wall of the shaft seat. This ensures that during the rotation of the torque slide bar, the locking shaft can move linearly along the inner cavity of the shaft seat under the action of the thread.

[0029] To further optimize the above technical solution, the bearing seat 1 includes a cylinder 11 and a bearing seat flange 12. The bearing seat flange 12 is fixed to the first end of the cylinder 11 and bolted to the gate blowout preventer 7. The opposite side walls of the housing 21 are provided with through holes corresponding to the inner cavity of the cylinder 11. The torque slide rod 41 passes through the through hole.

[0030] like Figure 1As shown, the two opposite side walls of the housing 21 are through, and the through hole on one of the side walls corresponds to the inner cavity of the cylinder 11. The hollow output shaft 22 is rotatably connected inside the housing 21 and its axis corresponds to the position of the through hole. The length of the torque slide bar 41 is greater than the locking stroke of the locking shaft 42. Therefore, the torque slide bar 41 passes through the two through holes. In order to ensure the integrity of the torque slide bar 41, a protective sleeve 26 is fastened to the side wall of the housing 21 away from the cylinder 11 and corresponding to the through hole in the circumferential direction.

[0031] To further optimize the above technical solution and ensure an effective connection between the shell 21 and the cylinder 11, a connector 3 is also included. The connector 3 is fixed to the second end of the cylinder 11 and bolted to the shell 21. The connector 3 is a connecting flange or a retaining ring.

[0032] like Figure 3 As shown, when the connecting part 3 is a connecting flange, the connecting flange is directly fixed to the second end of the cylinder 11 and its outer diameter is larger than the outer diameter of the cylinder 11. The bolt connection between the shell 21 and the cylinder 11 is realized through the connecting flange.

[0033] like Figure 4 and Figure 5 As shown, when the connector 3 is a retaining ring, the outer diameter of the retaining ring is the same as the outer diameter of the cylinder 11 and one end face of the retaining ring is bolted to the second end face of the cylinder 11; a ring plate 31 is fixed in the middle of the retaining ring, and the ring plate 31 divides the inner cavity of the retaining ring into two parts, one part is a large ring cavity 32 corresponding to the shell side, and the other part is a small ring cavity 33 corresponding to the cylinder 11 side. The inner wall of the large ring cavity 32 has a stepped surface, and the inner diameter of the ring plate 31 is larger than the non-circular polygonal cross section of the torque slide bar 41, ensuring that the torque slide bar 41 can pass through the retaining ring.

[0034] To further optimize the above technical solution, the reduction mechanism 2 also includes an input shaft 23 and a transmission component 24. The input shaft 23 is rotatably connected inside the housing 21 and its axis is perpendicular to the axis of the hollow output shaft 22. The transmission component 24 is installed inside the housing 21 and placed between the input shaft 23 and the hollow output shaft 22 to transmit torque. The drive shaft of the drive mechanism 5 is connected to the input shaft 23.

[0035] The input shaft and output shaft are arranged perpendicular to each other. The input shaft is driven to rotate by a drive mechanism. The transmission component is a single-stage or multi-stage reduction gear. The reduction and torque increase are achieved by setting the transmission component to ensure that the hollow output shaft has sufficient torque to transmit to the locking shaft. The transmission component can adopt the form of worm gear meshing, gear meshing, or bevel gear meshing, and the specific configuration depends on the space requirements and reduction ratio requirements.

[0036] In some other specific embodiments, manual locking of the gate shaft when the system malfunctions is also achieved by a handwheel 25. The handwheel 25 is suspended on the side wall of the housing 21 away from the drive mechanism 5 by a disconnecting mechanism. When the system is running normally, the handwheel 25 does not rotate with the rotation of the input shaft 23. Only when the drive mechanism 5 malfunctions, the handwheel 25 connects to the input shaft 23 to achieve manual locking of the gate shaft, thus ensuring the reliability of the system through manual operation.

[0037] In some other embodiments, the drive mechanism 5 is a device capable of transmitting torque, such as an electric motor or a hydraulic motor.

[0038] To further optimize the above technical solution, a control system 6 is also included. The control system 6 includes a human-machine interface 61, a locking / unlocking control unit 62, a fault protection unit 63, a drive control unit 65, a position calibration unit 66, and a control logic unit 64. The human-machine interface 61 is used to set the number of locking turns and the locking / unlocking position of the locking shaft 42, and simultaneously displays the current position, number of locking turns, locking or unlocking status, and fault status of the locking shaft 42. The locking / unlocking control unit 62 performs remote locking and unlocking operations. The fault protection unit 63 is used for phase loss, overload, overheating, or short circuit protection. The drive control unit 65 is electrically connected to the drive mechanism 5 to control the operation of the drive mechanism 5. The position calibration unit 66 performs power outage memory. The control logic unit 64 is a control assembly used to receive and transmit control signals.

[0039] like Figure 10 As shown, a locking system is installed at each end of the gate blowout preventer. After the gate shaft and gate are closed and sealed, the locking shaft needs to lock the gate shaft to prevent it from retracting. The control system controls the rotation of the drive shaft of the drive mechanism, which in turn drives the input shaft and hollow output shaft of the reduction mechanism to rotate. The hollow output shaft and the torque slide bar have a non-circular polygonal cross-section. When the hollow output shaft rotates, it drives the torque slide bar to rotate. The torque slide bar drives the locking shaft to rotate through the connecting sleeve. The locking shaft and the shaft seat are threaded together. The locking shaft advances helically, pressing against the gate shaft. When the number of rotations of the locking shaft and the locking torque of the locking shaft against the gate shaft reach the specified requirements, the control system issues a control command, and the drive mechanism stops. The threaded connection between the locking shaft and the locking shaft seat forms a mechanical self-lock, preventing it from retracting due to the back pressure generated by the gate shaft of the gate blowout preventer.

[0040] When the gate shaft and gate need to be opened after sealing, the locking shaft must be opened to allow space for the gate shaft to retract. The control system controls the drive mechanism to rotate in the opposite direction, which in turn drives the input shaft and hollow output shaft of the reduction mechanism to rotate; the torque slide bar drives the locking shaft to rotate in the opposite direction through the connecting sleeve. The locking shaft and the shaft seat are threaded together. The locking shaft spirals back, allowing space for the gate shaft to retract, thus completing the unlocking process.

[0041] In practical applications, the locking and unlocking positions are set on the human-machine interface. Pressing the buttons on the locking / unlocking control unit executes remote locking and unlocking operations. Holding the button for up to 3 seconds performs a jog locking / unlocking operation; holding it for more than 3 seconds performs an automatic locking / unlocking operation. The drive control unit controls and pushes the drive mechanism to perform locking and unlocking operations. The position calibration unit feeds back the current position signal of the locking shaft to the control logic unit, which then transmits the signal to the human-machine interface. The human-machine interface displays the current locking lever position, number of locking turns, and locking or unlocking status. If a phase loss, overload, overheating, or short circuit occurs during the locking / unlocking operation, the operation immediately stops. In the event of a power outage, the position calibration unit can memorize the current locking shaft position.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0043] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A remote automatic locking system for a gate blowout preventer, characterized in that, include: Shaft seat (1), the first end of which is bolted to the gate blowout preventer (7) and corresponds to the gate shaft; the inner wall of the shaft seat (1) is provided with internal threads; The deceleration mechanism (2) includes a housing (21) and a hollow output shaft (22); one side wall of the housing (21) is fixed to the second end of the shaft seat (1); the hollow output shaft (22) is rotatably connected inside the housing (21) and its axis corresponds to the gate shaft; The drive mechanism (5) is fixed to the outer wall of the housing (21) and its drive shaft is connected to the hollow output shaft (22). The locking mechanism (4) includes a torque slide bar (41) and a locking shaft (42). The torque slide bar (41) is assembled in the hollow cavity of the hollow output shaft (22). The torque slide bar (41) can rotate synchronously with the hollow output shaft (22) and move linearly. The locking shaft (42) is assembled in the shaft seat (1) and is coaxial with the torque slide bar (41). Its outer wall is provided with an external thread that meshes with the internal thread. One end of the locking shaft (42) is fixed to the torque slide bar (41), and the other end can abut against the gate shaft.

2. The remote automatic locking system for a gate blowout preventer according to claim 1, characterized in that, The length of the torque slide bar (41) is greater than the locking stroke of the locking shaft (42); the cross section of the torque slide bar (41) is a non-circular polygon, and the shape of the hollow cavity is adapted to the cross section shape of the torque slide bar (41).

3. The remote automatic locking system for a gate blowout preventer according to claim 2, characterized in that, The locking mechanism (4) further includes a connecting sleeve (43), the cavity shape of which is the same as that of the non-circular polygon; the cross section of the locking shaft (42) near the end of the torque slide (41) is the same as that of the torque slide (41); the two ends of the connecting sleeve (43) are respectively sleeved on the opposite ends of the torque slide (41) and the locking shaft (42); the outer wall of the connecting sleeve (43) is provided with a plurality of bolt holes (44), the threaded end of the locking bolt can be screwed into the bolt hole (44) and bolted to the torque slide (41) or the locking shaft (42).

4. The remote automatic locking system for a gate blowout preventer according to claim 2, characterized in that, The hollow cavity is a non-circular polygonal cavity (222) at one end near the locking shaft (42) that is adapted to the torque slide bar (41), and a circular cavity (221) at the other end; the cross-section of the circular cavity (221) is larger than the cross-section of the non-circular polygonal cavity (222).

5. A remote automatic locking system for a gate blowout preventer according to claim 1, characterized in that, The bearing seat (1) includes a cylinder (11) and a bearing seat flange (12). The bearing seat flange (12) is fixed to the first end of the cylinder (11) and bolted to the gate blowout preventer (7). The opposite side walls of the housing (21) are provided with through holes corresponding to the inner cavity of the cylinder (11). The torque slide rod (41) passes through the through holes.

6. A remote automatic locking system for a gate blowout preventer according to claim 5, characterized in that, It also includes a connector (3), which is fixed to the second end of the cylinder (11) and bolted to the shell (21).

7. A remote automatic locking system for a gate blowout preventer according to claim 6, characterized in that, The connector (3) is a connecting flange or a retaining ring.

8. A remote automatic locking system for a gate blowout preventer according to claim 1, characterized in that, The deceleration mechanism (2) further includes an input shaft (23) and a transmission component (24). The input shaft (23) is rotatably connected inside the housing (21) and its axis is perpendicular to the axis of the hollow output shaft (22). The transmission component (24) is installed inside the housing (21) and placed between the input shaft (23) and the hollow output shaft (22) to transmit torque. The drive shaft of the drive mechanism (5) is connected to the input shaft (23).

9. A remote automatic locking system for a gate blowout preventer according to claim 8, characterized in that, It also includes a handwheel (25); the handwheel (25) is suspended from the side wall of the housing (21) away from the drive mechanism (5) by a disconnecting mechanism. When the drive mechanism (5) fails, the handwheel (25) is connected to the input shaft (23) to achieve manual locking of the gate shaft.

10. A remote automatic locking system for a gate blowout preventer according to any one of claims 1 to 9, characterized in that, It also includes a control system (6), which includes a human-machine interface (61), a locking and unlocking control unit (62), a fault protection unit (63), a drive control unit (65), a position calibration unit (66), and a control logic unit (64). The human-machine interface (61) is used to set the number of locking turns and the locking / unlocking position of the locking shaft (42), and at the same time displays the current position, number of locking turns, locking or unlocking status and fault status of the locking shaft (42). The locking and unlocking control unit (62) performs remote locking and unlocking operations; The fault protection unit (63) is used for phase loss, overload, overheating or short circuit protection; The drive control unit (65) is used to control the operation of the drive mechanism (5); The position calibration unit (66) performs power-off memory; The control logic unit (64) is a control assembly used to receive and transmit control signals.

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