Automatic release mechanism for subsea equipment

Abstract

The application relates to an automatic pin pulling mechanism for disassembling seabed equipment, which comprises a shell, a rotating limiting arm, a locking pin shaft, a rotating pin shaft and a limiting pin shaft. The rotating limiting arm is connected to the top of the shell through the rotating pin shaft. A limiting cylinder is horizontally arranged on the shell. The locking pin shaft is arranged in the limiting cylinder of the shell. An end of the rotating limiting arm inserted into the shell is provided with a shift fork. A groove is arranged on the locking pin shaft. A positioning shaft is arranged in the middle of the groove. The shift fork of the rotating limiting arm is inserted into the positioning shaft in the groove. The shell is provided with the limiting pin shaft for limiting the rotating angle of the rotating limiting arm. The beneficial effect is that the pin pulling can be automatically completed, the workload of the diver under water is effectively reduced, the pin inserting work can be easily completed, the safety and reliability are ensured, the equipment structure is simple, and the stability is high.

Description

TECHNICAL FIELD

[0001] The present application belongs to the device of sand box, sand mold centering and positioning in the casting production line, and particularly relates to an automatic pin removing mechanism for underwater equipment disassembly. BACKGROUND

[0002] At present, the immersed tube construction of large underwater tunnel in China adopts a pulling and closing equipment for immersed tube installation. In the working process, in order to avoid the pulling and closing equipment from bouncing when performing the pulling operation, a bounce-proof pin shaft is installed. When the operation is completed and the equipment needs to be removed, the traditional way is to send a diver to underwater to rotate the pin shaft out little by little through the thread. The operation is difficult, and when the thread is jammed, the removal work cannot be completed by relying on manpower alone. SUMMARY

[0003] The present application aims at the above technical problems, and solves the automatic removal of the pin shaft of underwater equipment, effectively reduces the underwater operation of the diver, and improves the stability and efficiency of the work.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] The automatic pin removing mechanism for underwater equipment disassembly comprises a shell and a rotating limiting arm connected to the shell, a limiting cylinder is horizontally arranged in the shell, a locking pin shaft is inserted into the limiting cylinder, a recess is arranged on the locking pin shaft, a yoke that can be inserted into the recess is arranged at one end of the rotating limiting arm inserted into the shell, a positioning shaft is arranged in the recess in the middle of the yoke, a limiting pin shaft for limiting the rotating limiting arm is arranged above the limiting cylinder, a positioning hole is arranged in the middle of the rotating limiting arm, and the rotating limiting arm is inserted into the positioning hole through a rotating pin shaft inserted from the outside of the shell to rotate and drive the locking pin shaft to extend / retract.

[0006] Preferably, the limiting cylinder extends from the inside of the shell to the outside of the shell, and the locking pin shaft is inserted into the limiting cylinder of the shell and moves along the limiting cylinder.

[0007] Preferably, the limiting pin shaft is located on one side of the opening of the limiting cylinder.

[0008] Preferably, the rotating limiting arm rotates upward around the rotating pin shaft, the yoke on the rotating limiting arm drives the locking pin shaft to move to the inside of the shell, and the locking pin shaft retracts into the shell.

[0009] Preferably, the rotating limiting arm rotates downward around the rotating pin shaft, the yoke on the rotating limiting arm drives the locking pin shaft to move to the outside of the shell, and the locking pin shaft extends out of the shell.

[0010] Preferably, the yoke of the rotating limiting arm is provided with a limiting clamping groove matched with the limiting pin shaft.

[0011] Preferably, the minimum rotation angle of the rotation limiting arm is 50 degrees.

[0012] Preferably, the outer part of the rotation pin shaft and the limiting pin shaft is fixed by the assembling plate and the screw.

[0013] Compared with the prior art, the application has the advantages and positive effects that:

[0014] The application provides an automatic pin releasing mechanism for disassembling a subsea device. When the subsea device needs to be disassembled after operation, a lifting hole is arranged on the rotation limiting arm. When lifting, the torque generated by the gravity of the automatic pin releasing mechanism on the rotation limiting arm is much larger than the torque generated by the friction of the retracting locking pin shaft, so that the lifting tool first rotates the rotation limiting arm upward. The rotation of the rotation limiting arm drives the locking pin shaft to automatically retract into the shell through the fork below the rotation limiting arm, separates the rotation limiting arm from the reverse hook plate of the mooring column, and thus completes the automatic pin releasing process, effectively reducing the workload of the diver under water.

[0015] The limiting cylinder extends from the inside of the shell to the outside of the shell, the locking pin shaft is inserted into the limiting cylinder on the shell, the locking pin shaft moves along the limiting cylinder, effectively limits the extension length of the locking pin shaft, can realize pin releasing and installation, and can easily complete the pin insertion work, ensuring safety and reliability.

[0016] The rotation limiting arm rotates upward around the rotation pin shaft, the fork on the rotation limiting arm drives the locking pin shaft to move to the inside of the shell, the locking pin shaft retracts into the shell, and the fork on the rotation limiting arm can ensure that the rotation limiting arm and the locking pin shaft are tightly connected, so that the rotation limiting arm and the locking pin shaft are linked, the device structure is simple, and the stability is high. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view of the automatic pin releasing mechanism for disassembling a subsea device according to a preferred embodiment of the application.

[0018] Figure 2 It is a sectional view of the automatic pin releasing mechanism for disassembling a subsea device according to a preferred embodiment of the application.

[0019] Figure 3 It is an assembling exploded view of the automatic pin releasing mechanism for disassembling a subsea device according to a preferred embodiment of the application.

[0020] Figure 4 It is an installation view of the automatic pin releasing mechanism for disassembling a subsea device according to a preferred embodiment of the application.

[0021] Figure 5 It is a schematic view of the extension of the locking pin shaft of the automatic pin releasing mechanism for disassembling a subsea device according to a preferred embodiment of the application.

[0022] Figure 6Figure 6 is a schematic view of the locking pin shaft retraction of the automatic pin release mechanism for the subsea equipment disassembly of a preferred embodiment of the present application;

[0023] In the above figures: 10 automatic pin release mechanism, 101 housing, 102 rotation limiting arm, 103 locking pin shaft, 104 rotation pin shaft, 105 limiting pin shaft, 106 assembly plate, 107 screw, 108 groove, 109 positioning shaft, 1010 limiting clamping groove, limiting cylinder 1011, 20 is a column. DETAILED DESCRIPTION

[0024] In the following, the present application will be described in detail through exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can be beneficially combined into other embodiments without further description.

[0025] In the description of the present application, it should be noted that the terms "inner", "outer", "upper", "lower", "front", "back" and the like indicate the positional or locational relationship based on the positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0026] As Figures 1-6As shown, the automatic pin releasing mechanism for disassembling the subsea equipment comprises a shell 101 and a rotating limiting arm 102 connected to the shell, a limiting cylinder 1011 is horizontally arranged in the shell 101, a locking pin shaft 103 is inserted into the limiting cylinder 1011, a groove 108 is arranged on the locking pin shaft 103, a yoke is arranged on one end of the rotating limiting arm 102 inserted into the shell, a positioning shaft 10 is radially arranged in the middle of the groove 108 and crosses the middle opening of the yoke, a limiting pin shaft 105 is arranged above the limiting cylinder 1011 for limiting the rotating limiting arm 102, a positioning hole is arranged in the middle of the rotating limiting arm 102, the rotating limiting arm 102 is inserted into the positioning hole through a rotating pin shaft 104 inserted from the outside of the shell for rotation to drive the locking pin shaft 103 to extend / retract; the shell is welded by Q345 plate material, and is welded to the subsea equipment after being assembled to form an integral part with the subsea equipment, and has high strength characteristics. The overall structure is subjected to hot galvanizing and then paint spraying treatment to ensure the corrosion resistance of the subsea equipment during use. After the subsea equipment operation is completed, the lifting hole is arranged on the rotating limiting arm 102, and the gravity of the automatic pin releasing mechanism 10 generates a torque on the rotating limiting arm 102, which is much larger than the torque generated by the friction of the retracting locking pin shaft 103. The lifting device will first rotate the rotating limiting arm 102 upward, and the rotation of the rotating limiting arm 102 will drive the locking pin shaft 103 to automatically retract into the shell 101 through the yoke below the rotating limiting arm 102, so as to complete the separation from the reverse hook plate of the mooring column 20 and complete the automatic pin releasing process.

[0027] The limiting cylinder 1011 is arranged from the inside of the shell 101 to the outside of the shell 101, the locking pin shaft 103 is inserted into the limiting cylinder 1011 on the shell 101, and the locking pin shaft 103 moves along the limiting cylinder 1011 to effectively limit the extension length of the locking pin shaft 103, so that the pin releasing and installation can be realized.

[0028] The limiting pin shaft 105 is arranged above the limiting cylinder 1011 and located on the opening side of the limiting cylinder 1011 to effectively limit the rotation angle of the rotating limiting arm 102, so that the pin releasing and installation can be realized. The yoke of the rotating limiting arm 102 is provided with a limiting clamping groove 1010 matched with the limiting pin shaft 105, and the limiting clamping groove 1010 can ensure the stability of the limiting pin shaft 105.

[0029] By rotating the limiting arm 102 upward around the rotating pin shaft 104, the fork on the limiting arm 102 drives the locking pin shaft 103 to move inward to the shell 101; by rotating the limiting arm 102 downward around the rotating pin shaft 104, the fork on the limiting arm 102 drives the locking pin shaft 103 to move outward to the shell, and the locking pin shaft 103 extends out of the shell 101. The fork on the limiting arm 102 can ensure that the limiting arm 102 and the locking pin shaft 103 are tightly connected, thereby realizing the linkage of the limiting arm 102 and the locking pin shaft 103.

[0030] The rotating angle of the limiting arm 102 is within a certain range, and the minimum rotating angle is 50 degrees, which improves the adjusting angle of the limiting arm and enhances the stability of automatic pin release.

[0031] In addition, by assembling the plate 106 and the screw 107 outside the rotating pin shaft 104 and the limiting pin shaft 105, the rotating pin shaft 104 and the limiting pin shaft 105 can be fixed to prevent slipping.

[0032] Working principle:

[0033] The limiting arm 102 is connected to the shell 101 through the rotating pin shaft 103, the fork below the limiting arm 102 is connected to the positioning shaft 10 on the locking pin shaft 103, and the locking pin shaft 103 is placed in the hole on the shell and can move along the hole. When the limiting arm 102 rotates upward, the fork below the limiting arm 102 drives the locking pin shaft 103 to move, and the locking pin shaft 103 retracts into the shell. At this time, the pin release is completed. When the limiting arm 102 moves downward, the fork below the limiting arm 102 drives the locking pin shaft 103 to move in the other direction, and the locking pin shaft 103 extends below the reverse hook plate of the column 20. The limiting arm 102 cannot rotate after rotating downward to the limiting pin shaft 105, which ensures that the extension distance of the locking pin shaft 103 can only reach a certain distance.

[0034] The working process is that when the automatic pin removing mechanism 10 is lowered into the water, the locking pin shaft 103 is manually extended to the maximum, at this time the locking pin shaft 103 is below the reverse hook plate of the mooring column 20, the strength of the locking pin shaft 103 is far greater than the impact force when the equipment bounces, and plays a safety protection role; when the subsea equipment has finished operating and needs to be removed, a lifting hole is arranged on the rotating limiting arm 102, when lifting, the gravity of the automatic pin removing mechanism 10 generates a torque on the rotating limiting arm 102, which is far greater than the torque generated by the friction of the retraction of the locking pin shaft 103, the lifting device will first rotate the rotating limiting arm 102 upward, the rotation of the rotating limiting arm 102 will drive the locking pin shaft 103 to automatically retract into the shell 101 through the fork below the rotating limiting arm 102, the separation of the reverse hook plate of the mooring column 20 is completed, and thus the automatic pin removing process is completed.

[0035] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made on the basis of the technical essence of the present application to the above embodiments, which does not deviate from the technical solution content of the present application, still belongs to the protection scope of the technical solution of the present application.

Claims

1. An automatic unpinning mechanism for subsea equipment disassembly, characterized by: The application relates to a rotation limiting arm (102) connected to a shell (101) for welding to a seabed device, wherein a limiting cylinder (1011) is horizontally arranged in the shell (101), a locking pin shaft (103) is inserted into the limiting cylinder (1011), a groove (108) is arranged on the locking pin shaft (103), a yoke is arranged on one end of the rotation limiting arm (102) inserted into the shell, a positioning shaft (10) is arranged in the middle of the groove (108) and crosses the middle opening of the yoke, a limiting pin shaft (105) is arranged above the limiting cylinder (1011) for limiting the rotation limiting arm (102), a positioning hole is arranged in the middle of the rotation limiting arm (102), the rotation limiting arm (102) is inserted into the positioning hole through a rotating pin shaft (104) inserted from the outside of the shell, and the rotation limiting arm (102) drives the locking pin shaft (103) to extend or retract; the rotation limiting arm (102) rotates downwards around the rotating pin shaft (104), the yoke on the rotation limiting arm (102) drives the locking pin shaft (103) to move to the outside of the shell, the locking pin shaft (103) extends out of the shell (101) and is arranged below the reverse hook plate of a mooring column (20), the strength of the locking pin shaft (103) is greater than the impact force of the seabed device rebounding to play a safety protection role, a lifting hole is arranged on the rotation limiting arm (102), the torque generated by the gravity of the automatic pin releasing mechanism on the rotation limiting arm (102) is greater than the torque generated by the friction force of the locking pin shaft (103) retracting, so that the rotation limiting arm (102) rotates upwards around the rotating pin shaft (104) when the automatic pin releasing mechanism is lifted through the lifting hole, the yoke on the rotation limiting arm (102) drives the locking pin shaft (103) to move to the inside of the shell, and the locking pin shaft (103) retracts into the shell (101) to separate from the reverse hook plate of the mooring column (20).

2. The automatic de-mating mechanism for subsea equipment removal according to claim 1, wherein: The limiting cylinder (1011) extends from the inside of the shell (101) to the outside of the shell (101), the locking pin shaft (103) is inserted into the limiting cylinder (1011) of the shell (101) and moves along the limiting cylinder (1011).

3. The automatic de-mating mechanism for subsea equipment removal according to claim 1, wherein: The limiting pin shaft (105) is located on the opening side of the limiting cylinder (1011).

4. The automatic de-mating mechanism for subsea equipment removal according to claim 1, wherein: The yoke of the rotation limiting arm (102) is provided with a limiting clamping groove (1010) matched with the limiting pin shaft (105).

5. The automatic de-mating mechanism for subsea equipment removal according to claim 1, wherein: The minimum rotation angle of the rotation limiting arm (102) is 50 degrees.

6. The automatic de-mating mechanism for subsea equipment removal according to any one of claims 1-5, wherein: The rotating pin shaft (104) and the limiting pin shaft (105) are fixed through an assembling plate (106) and a screw (107).

Images