Offshore wind power phc prestressed pipe pile welding operation platform and use method thereof

Abstract

The present application relates to the technical fields of pipe pile welding, and discloses a kind of offshore wind power PHC prestressed pipe pile welding operation platform, comprising: loading platform;Two mounting plates, one left and one right are movably arranged in the left and right sides of loading platform top respectively;The opposite side of two mounting plates is fixedly installed with support shaft, the outer wall of two support shafts is fixedly connected with fixed bearing, two fixed bearings are fixedly arranged in two fixed cylinders respectively, and the opposite end of two fixed cylinders is fixedly installed with holder;Two holders and two hydraulic center frames are fixed with two pipe piles respectively, after the butt joint of the reserved steel ring of two pipe piles, the driving shaft can be rotated by starting rotating motor, the driving shaft is rotated through driving wheel, can synchronously drive two holders to rotate, in turn can make two pipe piles rotate synchronously, not only need to use complex control system, simultaneously can effectively guarantee the synchronism of two pipe piles rotation, convenient for welding operation.

Description

Technical Field

[0001] This invention relates to the field of pipe pile welding technology, specifically to a welding operation platform for offshore wind power PHC prestressed pipe piles and its usage method. Background Technology

[0002] Compared to onshore wind turbines, offshore wind turbines are also affected by sea breezes, seawater, and waves. Therefore, the foundation manufacturing process for offshore wind turbines is much more complex than that for onshore wind turbines. Among these components, PHC prestressed concrete pipe piles are crucial for the foundation of offshore wind turbines. The safe and high-quality construction of PHC prestressed concrete pipe piles is of great significance to the installation and use of the wind turbine. In actual construction, multiple PHC prestressed concrete pipe piles need to be joined together to reach the design length, and then horizontally welded.

[0003] For example, Chinese Patent Publication No. CN114714041A provides a fully automatic welding device for splicing offshore wind power steel pipe piles, belonging to the field of steel pipe pile welding technology. It solves the technical problem in existing devices where relative sliding between the steel pipe pile and the rotating roller easily affects welding efficiency and quality. This fully automatic welding device for splicing offshore wind power steel pipe piles includes a base, with a first support seat and a second support seat on the upper side of the base. A fixed seat is located at the upper left end of the base, and a first column is fixed on the fixed seat. A welding head is fixed at the right end of the first column, and a first pipe pile rotating assembly is mounted on the first column. A slide rail is fixed at the upper right end of the base, and a movable seat is slidably connected to the slide rail. A first electric telescopic rod is also fixed on the base, and the telescopic end of the first electric telescopic rod is fixedly connected to the movable seat. This invention has the advantages of stably driving the steel pipe pile to rotate, thereby ensuring welding uniformity and improving welding efficiency and quality.

[0004] While the aforementioned welding equipment can stably rotate the steel pipe piles, thus ensuring the uniformity of the welding, we have found certain shortcomings in practical applications, such as:

[0005] In the aforementioned welding equipment, the rotation of the two pipe piles is carried out independently during welding. This not only requires the use of a complex control system, but also makes it difficult to maintain the synchronization of rotation, affecting the welding quality. In addition, when constructing pipe piles of different diameters, it is also difficult for the aforementioned welding equipment to keep the positioning of the pipe piles concentric, which will lead to an uneven distance between the pipe piles and the welding device.

[0006] Based on this, we propose a welding operation platform for PHC prestressed pipe piles in offshore wind power and its usage method. Summary of the Invention

[0007] (1) Technical problems to be solved

[0008] To address the shortcomings of existing technologies, this invention provides a welding platform for PHC prestressed pipe piles in offshore wind power and its usage method, which has the advantages of enabling two pipe piles to rotate synchronously and ensuring that pipe piles of different diameters remain concentric during positioning.

[0009] (II) Technical Solution

[0010] To achieve the goal of synchronous rotation of the two pipe piles and ensuring concentricity of pipe piles of different diameters during positioning, this invention provides the following technical solution: a welding platform for offshore wind power PHC prestressed pipe piles, comprising:

[0011] Loading platform;

[0012] Two mounting plates, one on the left and one on the right, are respectively movable and set on the left and right sides of the top of the loading platform;

[0013] Support shafts are fixedly installed on opposite sides of the two mounting plates. Fixed bearings are fixedly connected to the outer walls of the two support shafts. The two fixed bearings are respectively fixedly installed inside the two fixed cylinders. Clamps are fixedly installed at opposite ends of the two fixed cylinders. The two clamps are respectively used to clamp the ends of the two pipe piles.

[0014] The pipe bodies of the two pipe piles are supported by two hydraulic central frames fixedly installed on the loading platform.

[0015] As a preferred embodiment of the present invention, a drive cavity is formed inside the loading platform, and a threaded rod is rotatably arranged inside the drive cavity. The left and right sides of the outer wall of the threaded rod are respectively formed with a first thread and a second thread with opposite directions of rotation. The outer walls of the first thread and the second thread are respectively threaded with a first nut and a second nut, and the two mounting plates are respectively fixedly installed on the first nut and the second nut.

[0016] As a preferred embodiment of the present invention, one end of the threaded rod is rotatably mounted on the inner wall of the drive cavity, and the other end extends to the outside of the loading platform and is fixedly connected to the output shaft of the drive motor. The drive motor is fixedly mounted on the side wall of the loading platform by a bracket.

[0017] As a preferred technical solution of the present invention, an external gear ring is also fixedly installed on the outer wall of the two fixed cylinders, and a drive wheel is meshed on the outer wall of the external gear ring. The drive wheel is fixedly installed on the drive shaft, and the drive shaft is rotatably disposed between the two positioning plates. Both positioning plates are fixedly installed on the loading platform.

[0018] One end of the drive shaft passes through the positioning plate and is fixedly connected to the output shaft of the rotary motor, which is fixedly mounted on the positioning plate by a mounting bracket.

[0019] As a preferred embodiment of the present invention, L-shaped rods are fixedly installed at the bottom of both the first nut and the second nut, and pistons are provided at opposite ends of the two L-shaped rods. The pistons are movably disposed in the moving cavity, which is located inside the loading platform and is divided in the middle by a partition plate. The partition plate divides the moving cavity into a left cavity and a right cavity. The left cavity and the right cavity are respectively connected to the two hydraulic center frames through two hydraulic pipes to provide hydraulic pressure to the hydraulic center frames.

[0020] As a preferred embodiment of the present invention, push plates are fixedly installed at the ends of both L-shaped rods, the push plates are movably disposed inside the outer cylinder, and the outer cylinder is fixedly connected to the piston.

[0021] A first spring is also fixedly installed between the push plate and the inner wall of the outer cylinder.

[0022] As a preferred embodiment of the present invention, the clamp is a clamping cabinet, in which a first clamping plate and a second clamping plate are movably arranged, one above the other, and clamping grooves are formed on opposite sides of the first clamping plate and the second clamping plate.

[0023] As a preferred technical solution of the present invention, tail rods are fixedly installed on the opposite sides of the first clamping plate and the second clamping plate, and movable plugs are fixedly installed at the ends of the two tail rods. The two movable plugs are respectively movably disposed in two hydraulic cylinders, and the two hydraulic cylinders are respectively fixedly installed on the upper and lower sides of the clamping cabinet.

[0024] A second spring is also fitted on the tail rod, and the second spring is fixedly disposed between the movable plug and the inner wall of the hydraulic cylinder.

[0025] As a preferred embodiment of the present invention, push rods are fixedly installed on opposite sides of the two mounting plates, and push plugs are fixedly installed at the ends of the push rods. The push plugs are movably disposed inside the oil tank, and the oil tank is fixedly installed on the loading platform.

[0026] An oil supply pipe is embedded in the push plug and push rod. One end of the oil supply pipe is open at the push plug, and the other end passes through the mounting plate and is rotatably connected to a rotary joint in the inner groove of the support shaft.

[0027] The other end of the rotary joint is connected to an oil supply pipe, which is connected to two hydraulic cylinders via two branch pipes.

[0028] A method for using a welding platform for PHC prestressed pipe piles in offshore wind power includes the following steps:

[0029] S1. Two pipe piles are suspended by a crane so that the opposite ends of the two pipe piles are inserted into two clamps respectively, and the pipe body is located at the hydraulic center frame.

[0030] S2. Control the drive motor to run, so that the two mounting plates move closer to each other. The two mounting plates move closer to each other, so that the opposite ends of the two pipe piles are connected, and at the same time, the clamp and hydraulic center frame complete the clamping and positioning of the pipe piles.

[0031] S3. Control the operation of the rotary motor to make the two clamps rotate, thereby driving the two pipe piles to rotate synchronously.

[0032] S4. Weld the reserved steel rings of the two pipe piles using a welding device.

[0033] (III) Beneficial Effects

[0034] Compared with the prior art, the present invention provides a welding operation platform for PHC prestressed pipe piles in offshore wind power, which has the following advantages:

[0035] 1. The offshore wind power PHC prestressed pipe pile welding platform has two clamps and two hydraulic center frames to fix two pipe piles respectively. After the reserved steel rings of the two pipe piles are connected, the drive shaft can be rotated by starting the rotary motor. The rotation of the drive shaft drives the two clamps to rotate synchronously through the drive wheel, thereby enabling the two pipe piles to rotate synchronously. This not only eliminates the need for a complex control system, but also effectively ensures the synchronicity of the rotation of the two pipe piles, facilitating welding operations.

[0036] 2. The offshore wind power PHC prestressed pipe pile welding platform drives the motor to rotate the threaded rod at the end of its output shaft. The rotation of the threaded rod, through the first and second threads with opposite directions on its outer wall, enables the first nut and the second nut to move in opposite directions, approaching or moving away from each other. When the first nut and the second nut approach each other, the two mounting plates can approach each other, and thus the two pipe piles can approach each other to complete the docking of the reserved steel ring.

[0037] When the first nut and the second nut approach each other, the hydraulic transmission can simultaneously clamp the pipe pile with the clamp and the hydraulic center frame, thereby completing the clamping and positioning of the pipe pile.

[0038] 3. The offshore wind power PHC prestressed pipe pile welding platform ensures that the pipe pile is positioned by a clamp and a hydraulic center frame, so the center position of the pipe pile is always fixed regardless of its diameter, and the distance between the pipe pile and the welding device is always balanced. Attached Figure Description

[0039] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0041] Figure 3 This is an enlarged schematic diagram of the L-shaped rod portion of the present invention;

[0042] Figure 4 This is a cross-sectional view of the fixed cylinder portion of the present invention;

[0043] Figure 5 This is an enlarged schematic diagram of the hydraulic center frame portion of the present invention;

[0044] Figure 6 This is a front sectional view of the clamping cabinet portion of the present invention;

[0045] Figure 7 This is a side sectional view of the clamping cabinet portion of the present invention;

[0046] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle;

[0047] In the diagram: 1. Loading platform; 2. Threaded rod; 3. Drive motor; 4. First thread; 5. Second thread; 6. First nut; 7. Second nut; 8. Mounting plate; 9. Support shaft; 10. Fixed bearing; 11. Fixed cylinder; 12. Clamp; 13. Pipe pile; 14. Hydraulic center frame; 15. External gear ring; 16. Drive wheel; 17. Drive shaft; 18. Positioning plate; 19. Rotary motor; 20. L-shaped rod; 21. Push plate ; 22. Outer cylinder; 23. First spring; 24. Piston; 25. Moving chamber; 26. Divider plate; 27. Hydraulic pipe; 28. Clamping cabinet; 29. ​​First clamping plate; 30. Second clamping plate; 31. Clamping groove; 32. Tail rod; 33. Moving plug; 34. Hydraulic cylinder; 35. Second spring; 36. Push rod; 37. Push plug; 38. Oil tank; 39. Oil supply pipe; 40. Rotary joint; 41. Oil supply pipe; 42. Branch pipe. Detailed Implementation

[0048] Example 1:

[0049] Please see Figure 1 -

[0050] Figure 4 A welding platform for PHC prestressed pipe piles in offshore wind power includes a loading platform 1. Two mounting plates 8 are movably mounted on the left and right sides of the top of the loading platform 1. The two mounting plates 8 can move on the top of the loading platform 1. Specifically:

[0051] The loading platform 1 has a drive cavity inside, and a threaded rod 2 is rotatably installed inside the drive cavity. One end of the threaded rod 2 is rotatably installed on the inner wall of the drive cavity, and the other end extends to the outside of the loading platform 1 and is fixedly connected to the output shaft of the drive motor 3. The drive motor 3 is fixedly installed on the side wall of the loading platform 1 by a bracket, so that the operation of the drive motor 3 can directly drive the threaded rod 2 to rotate.

[0052] The left and right sides of the outer wall of the threaded rod 2 are respectively formed with a first thread 4 and a second thread 5 with opposite directions of rotation. The outer walls of the first thread 4 and the second thread 5 are respectively threaded with a first nut 6 and a second nut 7. The two mounting plates 8 are respectively fixedly installed on the first nut 6 and the second nut 7.

[0053] The threaded rod 2 rotates through its outer wall to the opposite directions of the first thread 4 and the second thread 5, which enables the first nut 6 and the second nut 7 to move in opposite directions, moving closer or further apart from each other. When the first nut 6 and the second nut 7 move closer together, the two mounting plates 8 can move closer together.

[0054] like Figure 4 As shown, support shafts 9 are fixedly installed on opposite sides of the two mounting plates 8. Fixed bearings 10 are fixedly connected to the outer walls of the two support shafts 9. The two fixed bearings 10 are respectively fixedly installed inside the two fixed cylinders 11. Clamps 12 are fixedly installed on opposite ends of the two fixed cylinders 11. The two clamps 12 are respectively used to clamp the ends of the two pipe piles 13.

[0055] Thus, the clamp 12 can rotate on the support shaft 9 via the fixed cylinder 11 and the fixed bearing 10;

[0056] In addition, in this embodiment, the pipe bodies of the two pipe piles 13 are supported by two hydraulic center frames 14 fixedly installed on the loading platform 1.

[0057] Two pipe piles 13 are suspended by a crane, and the opposite ends of the two pipe piles 13 are respectively inserted into two clamps 12. The pipe body is located at the hydraulic center frame 14. The ends of the pipe piles 13 can be fixed by the clamps 12, and the pipe body of the pipe piles 13 can be fixed by the hydraulic center frame 14.

[0058] When the first nut 6 and the second nut 7 approach each other, the two mounting plates 8 can approach each other, and then the two pipe piles 13 can approach each other, completing the docking of the reserved steel ring. After docking, the reserved steel ring can be welded by a welding device (not shown in the figure).

[0059] In this embodiment, as Figure 2As shown, an external gear ring 15 is also fixedly installed on the outer wall of the two fixed cylinders 11. A drive wheel 16 meshes with the outer wall of the external gear ring 15. The drive wheel 16 is fixedly installed on the drive shaft 17. The drive shaft 17 is rotatably positioned between the two positioning plates 18. Both positioning plates 18 are fixedly installed on the loading platform 1. One end of the drive shaft 17 passes through the positioning plate 18 and is fixedly connected to the output shaft of the rotary motor 19. The rotary motor 19 is fixedly installed on the positioning plate 18 by a mounting bracket.

[0060] Two clamps 12 and two hydraulic center frames 14 fix two pipe piles 13 respectively. After the reserved steel rings of the two pipe piles 13 are connected, the drive shaft 17 can be rotated by starting the rotary motor 19. The rotation of the drive shaft 17 drives the two clamps 12 to rotate synchronously through the drive wheel 16, thereby enabling the two pipe piles 13 to rotate synchronously. This not only eliminates the need for a complex control system, but also effectively ensures the synchronicity of the rotation of the two pipe piles 13, facilitating rotary welding operations.

[0061] Example 2:

[0062] Please see Figure 2 , Figure 3 and Figure 5 Based on Embodiment 1, in this embodiment, L-shaped rods 20 are fixedly installed at the bottom of the first nut 6 and the second nut 7. Pistons 24 are provided at opposite ends of the two L-shaped rods 20. The pistons 24 are movably disposed in the moving cavity 25. The moving cavity 25 is opened inside the loading platform 1, and its middle part is divided by a partition plate 26. The partition plate 26 divides the moving cavity 25 into a left cavity and a right cavity. The left cavity and the right cavity are connected to the two hydraulic center frames 14 by two hydraulic pipes 27, respectively, for providing hydraulic pressure to the hydraulic center frames 14.

[0063] Specifically, push plates 21 are fixedly installed at the ends of the two L-shaped rods 20. The push plates 21 are movably disposed inside the outer cylinder 22. The outer cylinder 22 is fixedly connected to the piston 24. A first spring 23 is also fixedly disposed between the push plates 21 and the inner wall of the outer cylinder 22.

[0064] When the first nut 6 and the second nut 7 are not close together, the hydraulic center frame 14 is open, which facilitates the insertion of the pipe pile 13. When the first nut 6 and the second nut 7 are close to each other, the first nut 6 and the second nut 7 will drive the L-shaped rod 20 to move. The movement of the L-shaped rod 20 will first drive the piston 24 to move, and the hydraulic oil in the left and right chambers will be filled into the two hydraulic center frames 14 through the two hydraulic pipes 27. When the hydraulic center frame 14 is filled with hydraulic oil, its jaws will close, thereby automatically fixing the pipe pile 13.

[0065] After the pipe pile 13 is fully fixed, as the L-shaped rod 20 continues to move, the piston 24 can no longer move. At this time, the L-shaped rod 20 will squeeze the first spring 23 inside the outer cylinder 22 through the push plate 21.

[0066] Therefore, in this embodiment, when the first nut 6 and the second nut 7 approach each other, not only can the two pipe piles 13 approach each other to complete the docking, but the jaws of the two hydraulic center frames 14 can also close to complete the fixation of the pipe body of the pipe pile 13.

[0067] Example 3:

[0068] Please see Figure 6 -

[0069] Figure 8 Based on Embodiments 1 and 2, in this embodiment, the clamp 12 is a clamping cabinet 28, such as... Figure 6 The clamping cabinet 28 has a first clamping plate 29 and a second clamping plate 30 that are movably arranged one above the other. Each of the first clamping plate 29 and the second clamping plate 30 has a clamping groove 31 on the opposite side.

[0070] Thus, the first clamping plate 29 and the second clamping plate 30 approach each other, and the clamping and positioning of the end of the pipe pile 13 can be completed through the clamping groove 31.

[0071] Please see Figure 6 Tail rods 32 are fixedly installed on the opposite sides of the first clamping plate 29 and the second clamping plate 30. Movable plugs 33 are fixedly installed at the ends of the two tail rods 32. The two movable plugs 33 are respectively movably installed in the two hydraulic cylinders 34. The two hydraulic cylinders 34 are respectively fixedly installed on the upper and lower sides of the clamping cabinet 28. A second spring 35 is also sleeved on the tail rod 32. The second spring 35 is fixedly installed between the movable plugs 33 and the inner sidewalls of the hydraulic cylinders 34.

[0072] Hydraulic oil is filled into the two hydraulic cylinders 34. Under the action of the hydraulic oil, the moving plug 33 is pushed to move. The movement of the moving plug 33 is transmitted through the tail rod 32, which in turn drives the first clamping plate 29 and the second clamping plate 30 to move, thereby achieving the clamping and positioning of the end of the pipe pile 13.

[0073] In this embodiment, as Figure 7 As shown, push rods 36 are fixedly installed on opposite sides of the two mounting plates 8, and push plugs 37 are fixedly installed at the ends of the push rods 36. The push plugs 37 are movably disposed inside the oil tank 38, and the oil tank 38 is fixedly installed on the loading platform 1. Thus, when the two mounting plates 8 approach each other, the push rods 36 will also drive the push plugs 37 to move.

[0074] Please see Figure 8An oil supply pipe 39 is embedded in the push plug 37 and the push rod 36. One end of the oil supply pipe 39 is open at the push plug 37, and the other end passes through the mounting plate 8 and is rotatably connected to the rotary joint 40 in the inner groove of the support shaft 9. The other end of the rotary joint 40 is connected to the oil supply pipe 41. The oil supply pipe 41 is connected to two hydraulic cylinders 34 through two branch pipes 42 respectively.

[0075] When push rod 36 drives push plug 37 to move, hydraulic oil in oil tank 38 will enter hydraulic cylinder 34 through oil delivery pipe 39, rotary joint 40, oil supply pipe 41 and branch pipe 42, thereby causing the moving plug 33 in hydraulic cylinder 34 to move, realizing the clamping of first clamping plate 29 and second clamping plate 30.

[0076] Therefore, in this embodiment, when the first nut 6 and the second nut 7 approach each other, not only can the two pipe piles 13 approach each other to complete the docking, but the jaws of the two hydraulic center frames 14 can also close to complete the fixation of the pipe body of the pipe pile 13. In addition, hydraulic oil can be automatically injected into the hydraulic cylinder 34, so that the first clamping plate 29 and the second clamping plate 30 approach each other to clamp and position the end of the pipe pile 13.

[0077] Example 4:

[0078] Please see Figure 1 -

[0079] Figure 8 This embodiment provides a method for using a welding platform for PHC prestressed pipe piles in offshore wind power, specifically including the following steps:

[0080] Step 1: Suspend two pipe piles 13 using a crane, so that the opposite ends of the two pipe piles 13 are inserted into the two clamps 12 respectively, with the pipe body located at the hydraulic center frame 14;

[0081] Step 2: Control the drive motor 3 to run, so that the two mounting plates 8 move closer to each other. The two mounting plates 8 move closer to each other, so that the opposite ends of the two pipe piles 13 are connected, and at the same time, the clamp 12 and the hydraulic center frame 14 complete the clamping and positioning of the pipe piles 13.

[0082] Step 3: Control the operation of the rotary motor 19 to make the two clamps 12 rotate, thereby driving the two pipe piles 13 to rotate synchronously.

[0083] Step 4: Weld the reserved steel rings of the two pipe piles 13 using a welding device.

Claims

1. A welding platform for PHC prestressed pipe piles in offshore wind power, characterized in that, include: Loading platform (1); Two mounting plates (8) are movably set on the left and right sides of the top of the loading platform (1), one on the left and one on the right. Support shafts (9) are fixedly installed on opposite sides of the two mounting plates (8). Fixed bearings (10) are fixedly connected to the outer walls of the two support shafts (9). The two fixed bearings (10) are respectively fixedly installed inside the two fixed cylinders (11). Clamps (12) are fixedly installed at opposite ends of the two fixed cylinders (11). The two clamps (12) are respectively used to clamp the ends of the two pipe piles (13). The pipe bodies of the two pipe piles (13) are supported by two hydraulic center frames (14) fixedly installed on the loading platform (1); The loading platform (1) has a drive cavity inside, and a threaded rod (2) is rotatably arranged inside the drive cavity. The left and right sides of the outer wall of the threaded rod (2) are respectively formed with a first thread (4) and a second thread (5) with opposite directions of rotation. The outer walls of the first thread (4) and the second thread (5) are respectively threaded with a first nut (6) and a second nut (7). The two mounting plates (8) are respectively fixedly installed on the first nut (6) and the second nut (7). An external gear ring (15) is also fixedly installed on the outer wall of the two fixed cylinders (11). The outer wall of the external gear ring (15) is meshed with a drive wheel (16). The drive wheel (16) is fixedly installed on the drive shaft (17). The drive shaft (17) is rotatably arranged between two positioning plates (18). Both positioning plates (18) are fixedly installed on the loading platform (1). One end of the drive shaft (17) passes through the positioning plate (18) and is fixedly connected to the output shaft of the rotary motor (19), which is fixedly mounted on the positioning plate (18) by a mounting bracket; The bottom of the first nut (6) and the second nut (7) are both fixedly installed with L-shaped rods (20). Pistons (24) are provided at opposite ends of the two L-shaped rods (20). The pistons (24) are movably disposed in the moving cavity (25). The moving cavity (25) is opened inside the loading platform (1) and is divided in the middle by a partition plate (26). The partition plate (26) divides the moving cavity (25) into a left cavity and a right cavity. The left cavity and the right cavity are connected to the two hydraulic center frames (14) respectively by two hydraulic pipes (27) to provide hydraulic pressure to the hydraulic center frames (14).

2. The offshore wind power PHC prestressed pipe pile welding operation platform according to claim 1, characterized in that: One end of the threaded rod (2) is rotatably mounted on the inner wall of the drive cavity, and the other end extends to the outside of the loading platform (1) and is fixedly connected to the output shaft of the drive motor (3). The drive motor (3) is fixedly mounted on the side wall of the loading platform (1) by a bracket.

3. The offshore wind power PHC prestressed pipe pile welding operation platform according to claim 1, characterized in that: Push plates (21) are fixedly installed at the ends of the two L-shaped rods (20). The push plates (21) are movably disposed inside the outer cylinder (22). The outer cylinder (22) is fixedly connected to the piston (24). A first spring (23) is also fixedly installed between the push plate (21) and the inner wall of the outer cylinder (22).

4. The offshore wind power PHC prestressed pipe pile welding operation platform according to claim 1, characterized in that: The clamp (12) is a clamping cabinet (28). The clamping cabinet (28) has a first clamping plate (29) and a second clamping plate (30) that are movably arranged in a top-bottom position. Each of the first clamping plate (29) and the second clamping plate (30) has a clamping groove (31) on its opposite side.

5. The offshore wind power PHC prestressed pipe pile welding operation platform according to claim 4, characterized in that: Tail rods (32) are fixedly installed on the opposite sides of the first clamping plate (29) and the second clamping plate (30). Movable plugs (33) are fixedly installed at the ends of the two tail rods (32). The two movable plugs (33) are respectively movably arranged in the two hydraulic cylinders (34). The two hydraulic cylinders (34) are respectively fixedly installed on the upper and lower sides of the clamping cabinet (28). A second spring (35) is also fitted on the tail rod (32), and the second spring (35) is fixedly installed between the movable plug (33) and the inner wall of the hydraulic cylinder (34).

6. The offshore wind power PHC prestressed pipe pile welding operation platform according to claim 5, characterized in that: Push rods (36) are fixedly installed on opposite sides of the two mounting plates (8). Push plugs (37) are fixedly installed at the ends of the push rods (36). The push plugs (37) are movably disposed inside the oil tank (38). The oil tank (38) is fixedly installed on the loading platform (1). An oil delivery pipe (39) is embedded in the push plug (37) and push rod (36). One end of the oil delivery pipe (39) is open at the push plug (37), and the other end passes through the mounting plate (8) and is rotatably connected to a rotary joint (40) in the inner groove of the support shaft (9). The other end of the rotary joint (40) is connected to an oil supply pipe (41), which is connected to two hydraulic cylinders (34) through two branch pipes (42).

7. A method of using a welding platform for PHC prestressed pipe piles in offshore wind power, as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Two pipe piles (13) are suspended by a crane so that the opposite ends of the two pipe piles (13) are inserted into the two clamps (12) respectively, and the pipe body is located at the hydraulic center frame (14). S2. Control the drive motor (3) to run, so that the two mounting plates (8) move closer to each other. The two mounting plates (8) move closer to each other, so that the opposite ends of the two pipe piles (13) are connected, and at the same time, the clamp (12) and the hydraulic center frame (14) complete the clamping and positioning of the pipe piles (13). S3. Control the operation of the rotary motor (19) to make the two clamps (12) rotate, thereby driving the two pipe piles (13) to rotate synchronously; S4. Weld the reserved steel rings of the two pipe piles (13) using a welding device.

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