A multi-tube connection mechanism for a suction tube foundation sinking device

Abstract

The present invention discloses a multi-tube connection mechanism for a suction cylinder foundation sinking device, which relates to the technical field of marine structure foundations. The mechanism mainly includes a base and a sinking device body. The sinking device body is fixed on the base, and the sinking device body can be connected to the suction cylinder through a connecting device. The sinking device body includes an emergency unlocking device, a locking member, and a driving device. The driving device is connected to the locking member and can drive the locking member to lock or unlock the connecting device. The two ends of the driving device are respectively connected to the locking member and the emergency unlocking device. The emergency unlocking device can drive the driving device and the locking member to move. The emergency unlocking device is used to manually unlock the locking member when the driving device cannot work. The present invention can, when the hydraulic system or remote control system fails and cannot unlock the sinking device, emergency unlock the sinking device, separate the sinking device from the suction cylinder foundation, and improve the overall reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of marine structure foundations, in particular to a multi-tube connection mechanism of a suction tube foundation sinking device. Background Art

[0002] A suction tube foundation is a type of offshore foundation with an open bottom and closed top. It resembles an inverted teacup. Its massive tube creates friction with the seabed strata, providing tremendous bearing capacity for the subsea structure. Suction tube foundations are available in single-tube and multi-tube types. The multi-tube type is typically a suction tube jacket structure, where three or four suction tubes jointly support a jacket. Suction tube foundation installation requires specialized sinking equipment. After the suction tube, driven by its own weight, penetrates the seabed to a certain depth, it is pumped out through the water pump inside the sinking equipment, draining water from the tube. This creates a negative pressure inside the tube relative to the external environment. The pressure of the seawater above acts on the top of the tube, pressing the suction tube into the seabed.

[0003] Penetration equipment: It is usually placed on the top of the suction cylinder and fixed to the suction cylinder through a special locking device. The penetration device can suck seawater from the inside of one suction cylinder, or it can suck seawater from the inside of multiple suction cylinders through a diversion device. The penetration device enters the water together during the underwater installation of the suction cylinder. After installation, the penetration device needs to be recovered, and the penetration device needs to be unlocked during recovery. The conventional locking device is a simple hydraulic cylinder that pushes the lock pin or claw to lock, and lacks an emergency unlocking function. Once the hydraulic system or control system fails, the remote unlocking cannot be performed, resulting in the inability to recover the penetration device, causing a construction safety risk. Therefore, a multi-cylinder connection mechanism for a suction cylinder foundation penetration device is needed, so that when the hydraulic system or remote control system fails and the penetration device cannot be unlocked, the penetration device can be unlocked in an emergency to separate the penetration device from the suction cylinder foundation, and the unlocking device can ensure the overall reliability of the equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-cylinder connection mechanism for a suction cylinder foundation sinking device to solve the problems existing in the above-mentioned prior art. When the hydraulic system or remote control system fails and the sinking equipment cannot be unlocked, the sinking device can be unlocked in an emergency, and the sinking device can be separated from the suction cylinder foundation, thereby improving the overall reliability.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a multi-cylinder connection mechanism of a suction cylinder foundation penetration device, comprising a base and a penetration equipment body, wherein the penetration equipment body is fixed on the base, and the penetration equipment body can be connected to the suction cylinder through a connecting device, and the penetration equipment body comprises an emergency unlocking device, a locking piece and a driving device, wherein the driving device is connected to the locking piece and can drive the locking piece to lock or unlock the connecting device, and the two ends of the driving device are respectively connected to the locking piece and the emergency unlocking device, and the emergency unlocking device can drive the driving device and the locking piece to move, and the emergency unlocking device is used to manually unlock the locking piece when the driving device fails to work.

[0007] Preferably, the main body of the sinking equipment includes a diverter device and an exhaust device, the exhaust device includes a second joint and a central cylinder, the bottom end of the central cylinder is connected to a suction cylinder through the second joint, the top of the central cylinder is provided with an exhaust port for exhaust, and a side outlet is provided on the side wall; the diverter device includes a collecting port and multiple first joints, the collecting port is used for drainage, and the collecting port is connected to multiple first joints through connecting pipes, one of the first joints is connected to the side outlet on the central cylinder, and the remaining first joints are each connected to one suction cylinder.

[0008] Preferably, the connecting pipe includes a four-way pipe and a three-way joint, one interface of the four-way pipe is connected to the first interface of the three-way joint, the second interface of the three-way joint is connected to one of the first joints, and the third interface of the three-way joint is the collection port for collecting seawater; the remaining three joints of the four-way pipe are respectively connected to three of the first joints.

[0009] Preferably, the first joint and the side outlet of the central cylinder or the first joint and the corresponding suction cylinder are connected via a hydraulically controlled butterfly valve.

[0010] Preferably, the hydraulically controlled butterfly valve includes a second hydraulic actuator and a second butterfly valve, the second butterfly valve is used to be connected to the first connector, the second hydraulic actuator is connected to the second butterfly valve, and is used to control the opening and closing degree of the second butterfly valve, and the second hydraulic actuator is connected to an angle encoder and a hydraulic lock, the angle encoder is used to control the second hydraulic actuator according to the output signal of the underwater monitoring system, and the hydraulic lock can fix the opening and closing position of the second butterfly valve.

[0011] Preferably, the exhaust device further includes a first butterfly valve and a first hydraulic actuator. The first butterfly valve is connected to the exhaust port of the central cylinder and can close the exhaust port. The first hydraulic actuator is used to control the opening and closing of the first butterfly valve.

[0012] Preferably, the emergency unlocking device includes a screw elevator and a rotating part, the screw elevator includes an input end and an output end, the rotating part is connected to the input end, and can drive the output end of the screw elevator to perform telescopic movement, and the end of the output end away from the rotating part is fixedly connected to the driving device, wherein the rotating part is a rotating handwheel, and the emergency unlocking device is arranged on both sides of the sinking equipment body, and is connected by a connecting rod and a coupling, so as to realize synchronous drive.

[0013] Preferably, the base includes a vertical plate and a bottom plate, the vertical plate is vertically fixed to the end of the bottom plate, and a hole is provided on the vertical plate for the central axis of the emergency unlocking device to pass through, and the vertical plate can fixedly support one end of the emergency unlocking device away from the driving device; two oppositely arranged lock hole plates are also provided on the bottom plate, and the two lock hole plates are provided with opposite first through holes, and connecting holes are provided on the periphery of the connecting device. When the base is connected to the connecting device, the connecting hole of the connecting device can extend into the space between the two lock hole plates and be aligned with the first through hole, and the locking member passes through the first through hole and the connecting hole to fixedly connect the base to the connecting device.

[0014] Preferably, an indicator rod is provided at one end of the locking member close to the driving device for indicating the position of the sinking device body, wherein the locking member is a latch.

[0015] Preferably, the connecting device includes a docking tube, a latch ear plate, a support plate and a branch port, the docking tube is used to connect the second joint with a suction tube, the latch ear plate is fixedly connected to the periphery of the docking tube, and is provided with the connecting hole, the branch port is used to connect the first joint with other suction tubes, and the branch port is fixedly connected through the support plate and connected to the side of the docking tube through the support plate.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The main body of the penetration equipment of the present invention is fixed on the base, and the main body of the penetration equipment can be connected to the suction cylinder through a connecting device. The main body of the penetration equipment includes an emergency unlocking device, a locking member and a driving device. The driving device is connected to the locking member and can drive the locking member to lock or unlock the connecting device. The emergency unlocking device is used to manually unlock the locking member when the driving device fails to work, so that when the driving device, such as the hydraulic system or remote control system, fails and cannot unlock the penetration equipment, the emergency unlocking device can be used to unlock the penetration device, separate the penetration device from the suction cylinder base, and improve the overall reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a front view of the sinking device body in an embodiment of the present invention, which is arranged on the base and is not connected to the connecting device;

[0020] Figure 2 This is an axonometric view of the sinking device body in an embodiment of the present invention, which is disposed on a base and is not connected to the connecting device;

[0021] Figure 3 Schematic diagram of the connection structure of the emergency unlocking device, the locking member and the driving device in an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the connection structure of the diverter device and the exhaust device in an embodiment of the present invention;

[0023] Figure 5 Schematic diagram of the structure of the hydraulically controlled butterfly valve in an embodiment of the present invention;

[0024] Figure 6 This is a schematic structural diagram of a connecting device in an embodiment of the present invention;

[0025] Figure 7 Schematic diagram of an exhaust mode in an embodiment of the present invention;

[0026] Figure 8 Schematic diagram of the drainage mode in an embodiment of the present invention.

[0027] Figure 9 Schematic diagram of a control system based on the PID principle in an embodiment of the present invention.

[0028] In the figure: 1-base; 11-bottom plate; 12-center cylinder; 13-side outlet; 14-vertical plate; 15-key hole plate; 2-exhaust device; 21-first butterfly valve; 22-first hydraulic actuator; 3-emergency unlocking device; 31-screw lift; 32-connecting rod; 33-coupling; 34-driving device; 35-locking member; 36-indicator rod; 37-rotating member; 38-center shaft; 4-flow diverter; 41-four-way pipe; 42-hydraulic-controlled butterfly valve; 421-second butterfly valve; 422-second hydraulic actuator; 423-hydraulic lock; 424-angle encoder; 43-tee joint; 431-first interface; 432-second interface; 433-third interface; 44-first joint; 5-second joint; 6-connecting device; 61-docking tube; 62-latch ear plate; 63-branch port; 64-support plate. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The purpose of the present invention is to provide a multi-cylinder connection mechanism for a suction cylinder foundation sinking device to solve the problems existing in the above-mentioned prior art, so that when a driving device such as a hydraulic system or a remote control system fails and the sinking equipment cannot be unlocked, the sinking device can be unlocked in an emergency and the sinking device can be separated from the suction cylinder foundation, thereby improving the overall reliability.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figures 1-9As shown, the present invention provides a multi-cylinder connection mechanism of a suction cylinder foundation sinking device, including a base 1 and a sinking device body, the sinking device body is fixed on the base 1, and the sinking device body can be connected to the suction cylinder through a connecting device 6, the sinking device body includes an emergency unlocking device 3, a locking member 35 and a driving device 34, the output shaft of the driving device 34 is connected to the locking member 35, and can drive the locking member 35 to move to achieve locking or unlocking the connecting device 6, the two ends of the driving device 34 are respectively connected to the locking member 35 and the emergency unlocking device 3, the emergency unlocking device 3 can drive the driving device 34 and the locking member 35 to move, and the driving device 34 can be a hydraulic system or other electronic control Or an automatic control device such as pneumatic control and connected to a remote control system. The driving device 34 of this embodiment is preferably a hydraulic cylinder. Under normal circumstances without faults, the locking and unlocking of the locking member 35 are controlled by the driving device 34. The emergency unlocking device 3 is used to manually unlock the locking member 35 when the driving device 34 fails to work. The setting of the emergency unlocking device 3 makes it possible to unlock the sinking device through the emergency unlocking device 3 when the driving device 34 or the remote control system fails and the sinking device cannot be unlocked, and the sinking device can be separated from the suction cylinder base. The emergency unlocking device 3 and the driving device 34 doubly guarantee the unlocking of the sinking device body relative to the suction cylinder, which can improve the overall reliability.

[0033] In some embodiments, the main body of the sinking device includes a diverter device 4 and an exhaust device 2. The exhaust device 2 includes a second joint 5 and a central cylinder 12. The bottom end of the central cylinder 12 is connected to a suction cylinder through the second joint 5. The top of the central cylinder 12 is provided with an exhaust port for exhaust, and a side outlet 13 is provided on the side wall. The diverter device 4 includes a collection port and multiple first joints 44. The collection port is used for drainage, and the collection port is connected to the multiple first joints 44 through connecting pipes. One of the first joints 44 is connected to the side outlet 13 on the central cylinder 12, and the remaining first joints 44 are each connected to a suction cylinder. When drainage is required, the water pump at the collection port is turned on, and part of the seawater passes through the second joint 5 and then through the side outlet 13, and another part passes through the first joint 44. The two parts of seawater are collected at the collection port and discharged. When exhaust is required, the exhaust port is opened, and part of the gas passes through the second joint 5, and another part of the gas passes through the first joint 44 and then through the side outlet 13, and finally collects in the central cylinder 12 and is discharged through the exhaust port.

[0034] In some embodiments, the connecting pipe includes a four-way pipe 41 and a three-way joint 43, one interface of the four-way pipe 41 is connected to the first interface 431 of the three-way joint 43, the second interface 432 of the three-way joint 43 is connected to a first joint 44, and the third interface 433 of the three-way joint 43 is a collection port, which is connected to a water pump for collecting seawater and discharging it; the remaining three joints of the four-way pipe 41 are respectively connected to three first joints 44. Specifically, the connection between the first joint 44 and the three-way joint 43, the connection between the first joint 44 and the four-way pipe 41, and the connection between the first joint 44 and the side outlet 13 are all through flange connections. It should be noted that according to the different number of suction cylinder foundations, the form of the four-way pipe 41 and the three-way joint 43 can be appropriately changed. For example, when three suction cylinders are provided, the three-way joint 43 may not be required, and the mouth of the four-way pipe 41 can be used as the collection port. This embodiment can realize that a set of submerged penetration equipment main body can suck seawater from the inside of up to four suction cylinders, which can be adjusted at will according to the three-cylinder or four-cylinder structure of the suction cylinder's jacket and the displacement requirements, and can switch between multi-branch exhaust and multi-branch suction modes by opening and closing the exhaust port and the water pump.

[0035] In some embodiments, a hydraulically controlled butterfly valve 42 is provided between the first joint 44 and the side outlet 13 of the central cylinder 12 or between the first joint 44 and the corresponding suction cylinder. The hydraulically controlled butterfly valve 42 can be used to accurately control whether the gas or liquid is flowing and the flow rate. The hydraulically controlled butterfly valve 42 is smaller in size than the ball valve combined with the swing cylinder, saving space.

[0036] As a preferred embodiment, the diameter of the exhaust port is larger than the diameter of the collection port to facilitate the rapid discharge of gas. A large-diameter exhaust port and four independent hydraulically controlled butterfly valves 42 are used. The water pump is not started, and only the large-diameter exhaust port and the four branch hydraulically controlled valves are opened. This is the exhaust mode. When the large-diameter exhaust port is closed and the hydraulically controlled butterfly valve 42 is opened, and the water pump is connected to the collection port, it is the drainage mode.

[0037] In some embodiments, the hydraulically controlled butterfly valve 42 includes a second hydraulic actuator 422 and a second butterfly valve 421. The second butterfly valve 421 is connected to the first connector 44. The second hydraulic actuator 422 is connected to the second butterfly valve 421 to control the opening and closing degree of the second butterfly valve 421. The second hydraulic actuator 422 is connected to an angle encoder 424 and a hydraulic lock 423. The angle encoder 424 is used to monitor the output signal of the underwater monitoring system and feed it back to the controller, which controls the second hydraulic actuator 422. The hydraulic lock 423 can fix the opening and closing position of the second butterfly valve 421. When the jacket of the suction cylinder tilts during penetration, the penetration speed can be adjusted by increasing the displacement of each suction cylinder to correct the tilt. The second hydraulic actuator 422 of the hydraulically controlled butterfly valve 42 is equipped with a hydraulic lock 423 and an angle sensor. The control system automatically adjusts the opening and closing angle of the butterfly valve to a set value based on the proportional-integral-differential control (PID control principle), thereby quantitatively adjusting the displacement of each branch to ensure that the jacket of the suction cylinder can be corrected in a timely manner. Specifically, the current value of the butterfly valve angle sensor is compared with the expected value. The PID calculation system outputs a signal based on the error between the current value and the expected value, and outputs it to the register after processing by the controller. After receiving this signal, the register calculates and outputs a drive signal. After the hydraulic valve group receives this drive signal, the hydraulic actuator rotates to adjust the butterfly valve, and the adjusted result is compared with the expected value through the sensor. If there is an error, the adjustment will continue; if there is no error, the adjustment is completed.

[0038] In some embodiments, the exhaust device 2 further includes a first butterfly valve 21 and a first hydraulic actuator 22 . The first butterfly valve 21 is connected to the exhaust port of the central cylinder 12 and can close the exhaust port. The first hydraulic actuator 22 is used to control the opening and closing of the first butterfly valve 21 .

[0039] In some embodiments, the emergency unlocking device 3 includes a spiral elevator 31 and a rotating part 37. The spiral elevator 37 includes an input end and an output end. The rotating part 31 is connected to the input end and can drive the output end of the spiral elevator 37 to perform telescopic movement. The end of the output end away from the rotating part is fixedly connected to the driving device 34. When the driving device 34 fails to work normally, by rotating the rotating part 31, the output end of the spiral elevator 37 can drive the driving device 34 and the locking part 35 to perform telescopic movement as a whole. As a feasible embodiment, the screw elevator 31 includes a central shaft 38, a worm wheel and a worm. The central shaft 38 is provided with a thread for connecting with the threaded inner cavity of the worm wheel, and the other end of the central shaft 38 is fixedly connected to the driving device 34. The rotating member 37 is connected to the worm. By rotating the rotating member 37, the worm can be driven to rotate, and the worm drives the worm wheel to rotate, and then the worm wheel drives the movement of the central shaft 38. The central shaft 38 only performs telescopic movement and does not rotate. Among them, the rotating member 37 is a rotating handwheel, and the emergency unlocking device 3 is provided on both sides of the main body of the sinking device and is connected by a connecting rod 32 and a coupling 33 to achieve synchronous drive. When in use, no matter which side of the rotating handwheel is rotated, the main body of the sinking device can be unlocked. When the driving device 34 is working abnormally, the rotating handwheel can be rotated by a diver or an ROV robot to unlock the locking member 35. It should be noted that the rotating member 37 can also be of other types, for example, a rotating rocker or similar device, as long as it can be convenient for the operator to rotate it to realize the operation of the spiral elevator 31. The spiral elevator is a standard product and other types of spiral elevators can be used to achieve it. This technology is a mature existing technology and will not be elaborated on here.

[0040] In some embodiments, the base 1 includes a vertical plate 14 and a bottom plate 11. The vertical plate 14 is vertically fixed to the end of the bottom plate 11, and a hole is opened on the vertical plate 14 for supplying the central axis 38 of the emergency unlocking device 3 to pass through. The vertical plate 14 can fix and support one end of the emergency unlocking device 3 away from the driving device 34; specifically, the spiral elevator 31 is locked to the vertical plate 14 by bolts, and two oppositely arranged lock hole plates 15 are also provided on the bottom plate 11. The two lock hole plates 15 are provided with opposite first through holes, and a connecting hole is provided on the periphery of the connecting device 6. When the base 1 is connected to the connecting device 6, the connecting hole of the connecting device 6 can extend into the space between the two lock hole plates 15 and be aligned with the first through hole. The locking member 35 passes through the first through hole and the connecting hole to fix the base 1 to the connecting device 6.

[0041] In some embodiments, an indicator rod 36 is provided at one end of the locking member 35 close to the driving device 34 for indicating the position of the sinking device body, wherein the locking member 35 is a pin, and the pin can be inserted into the first through hole and the connecting hole to connect the base 1 with the connecting device 6.

[0042] In some embodiments, the connecting device 6 includes a docking tube 61, a latch lug 62, a support plate 64, and a branch port 63. The docking tube 61 is used to connect the second connector 5 with a suction tube. The second connector 5 extends into the docking tube 61, and the docking tube 61 docks with the suction tube. The latch lug 62 is fixedly connected to the periphery of the docking tube 61 and is provided with a connection hole. In addition, a through hole for the latch lug to pass through is provided on the base. The branch port 63 is used to connect the first connector 44 with other suction tubes, and the branch port 63 is fixedly connected, preferably welded, through the support plate 64 and connected to the side of the docking tube 61 through the support plate 64. Compared with not providing the second connector 5 and directly using the central cylinder 12 to dock with the suction tube, providing the second connector 5 to extend into the docking tube 61 and fit therewith facilitates docking between the central cylinder 12 and the suction tube, making docking simpler and faster. The branch port 63 is also provided to facilitate docking between the first connector 44 and other suction tubes.

[0043] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A multi-tube connection mechanism for a suction tube foundation sinking device, characterized by: The device comprises a base and a sinking device body, wherein the sinking device body is fixed on the base and can be connected to the suction cylinder through a connecting device, and the sinking device body comprises an emergency unlocking device, a locking member and a driving device, wherein the driving device is connected to the locking member and can drive the locking member to lock or unlock the connecting device, and the two ends of the driving device are respectively connected to the locking member and the emergency unlocking device, and the emergency unlocking device can drive the driving device and the locking member to move, and the emergency unlocking device is used to manually unlock the locking member when the driving device fails to work; The main body of the sinking equipment includes a diverter device and an exhaust device, the exhaust device includes a second joint and a central cylinder, the bottom end of the central cylinder is connected to a suction cylinder through the second joint, the top of the central cylinder is provided with an exhaust port for exhaust, and a side outlet is provided on the side wall; the diverter device includes a collection port and multiple first joints, the collection port is used for drainage, and the collection port is connected to multiple first joints through connecting pipes, one of the first joints is connected to the side outlet on the central cylinder, and the remaining first joints are each connected to a suction cylinder, wherein the diameter of the exhaust port is larger than the diameter of the collection port.

2. The multi-tube connection mechanism of the suction tube foundation penetration device according to claim 1 is characterized in that: The connecting pipe includes a four-way pipe and a three-way joint. One interface of the four-way pipe is connected to the first interface of the three-way joint, the second interface of the three-way joint is connected to one of the first joints, and the third interface of the three-way joint is the collection port for collecting seawater; the remaining three joints of the four-way pipe are respectively connected to three of the first joints.

3. The multi-tube connection mechanism of the suction tube foundation sinking device according to claim 2 is characterized in that: The first joint and the side outlet of the central cylinder or the first joint and the corresponding suction cylinder are connected via a hydraulically controlled butterfly valve.

4. The multi-tube connection mechanism of the suction tube foundation penetration device according to claim 3, characterized in that: The hydraulically controlled butterfly valve includes a second hydraulic actuator and a second butterfly valve. The second butterfly valve is used to be connected to the first connector. The second hydraulic actuator is connected to the second butterfly valve to control the opening and closing degree of the second butterfly valve. The second hydraulic actuator is connected to an angle encoder and a hydraulic lock. The angle encoder is used to control the second hydraulic actuator according to the output signal of the underwater monitoring system. The hydraulic lock can fix the opening and closing position of the second butterfly valve.

5. The multi-tube connection mechanism of the suction tube foundation sinking device according to claim 1 is characterized in that: The exhaust device further includes a first butterfly valve and a first hydraulic actuator. The first butterfly valve is connected to the exhaust port of the central cylinder and can close the exhaust port. The first hydraulic actuator is used to control the opening and closing of the first butterfly valve.

6. The multi-tube connection mechanism of the suction tube foundation sinking device according to claim 1, characterized in that: The emergency unlocking device includes a screw elevator and a rotating part, the screw elevator includes an input end and an output end, the rotating part is connected to the input end, and can drive the output end of the screw elevator to perform telescopic movement, and the end of the output end away from the rotating part is fixedly connected to the driving device, wherein the rotating part is a rotating handwheel, and the emergency unlocking device is arranged on both sides of the sinking equipment body, and is connected by a connecting rod and a coupling, so as to realize synchronous drive.

7. The multi-tube connection mechanism of the suction tube foundation sinking device according to claim 6, characterized in that: The base includes a vertical plate and a bottom plate, the vertical plate is vertically fixed to the end of the bottom plate, and a hole is opened on the vertical plate for the central axis of the emergency unlocking device to pass through, and the vertical plate can fixedly support one end of the emergency unlocking device away from the driving device; two oppositely arranged lock hole plates are also provided on the bottom plate, and the two lock hole plates are provided with opposite first through holes, and the periphery of the connecting device is provided with connecting holes. When the base is connected to the connecting device, the connecting hole of the connecting device can extend into the space between the two lock hole plates and be aligned with the first through hole. The locking member passes through the first through hole and the connecting hole to fixedly connect the base to the connecting device.

8. The multi-tube connection mechanism of the suction tube foundation sinking device according to claim 1, characterized in that: An indicator rod is provided at one end of the locking member close to the driving device for indicating the position of the sinking device body, wherein the locking member is a latch.

9. The multi-tube connection mechanism of the suction tube foundation sinking device according to claim 7, characterized in that: The connecting device includes a docking tube, a latch ear plate, a support plate and a branch port. The docking tube is used to connect the second joint with a suction tube. The latch ear plate is fixedly connected to the periphery of the docking tube and is provided with the connecting hole. The branch port is used to connect the first joint with other suction tubes, and the branch port is fixedly connected through the support plate and connected to the side of the docking tube through the support plate.

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