Pile turning device and pile turning method for offshore single pile foundation installation

Abstract

This invention relates to the field of marine monopile construction technology, and in particular to a pile-turning device and method for marine monopile foundation installation. The device includes a first traction component and a second traction component, an inner clamping component, a connector, multiple inner grippers and a pushing component, and an outer connecting component. During the pile-turning process, the second traction component first pulls and supports the outer connecting component, which is fixedly connected to the surface of the pipe pile. The outer connecting component is fixed at the middle position of the extended trajectory of the pipe pile. The connector is inserted into the cavity at the end of the pipe pile. The first traction component pulls the outer connecting component to support the middle position of the pipe pile surface. The second traction component pulls the connector, causing the pipe pile to turn. The second traction component unwinds the second traction rope until the pipe pile is in a vertical state, maintaining it on the same axis as the first traction rope.

Description

Technical Field

[0001] This invention relates to the field of marine monopile construction, and in particular to a pile-turning device and method for marine monopile foundation installation. Background Technology

[0002] The steel pipe piles used in offshore engineering are characterized by their long length and heavy weight, typically exceeding 60-70 meters in length and weighing over 1,000 tons. These steel pipe piles are generally manufactured as finished products in land-based steel pipe pile processing plants and then transported to the offshore construction site by barges for driving.

[0003] When transporting steel pipe piles, they are generally transported horizontally. Before pile driving, the steel pipe piles lying horizontally on the barge need to be lifted horizontally and then turned over to adjust their posture to a vertical state before pile driving. The specific construction plan is as follows: The steel pipe pile usually has three lifting points: two main lifting lugs near the middle of the pile and one tail lifting point, which facilitates the lifting, turning, and erection of the steel pipe pile. The lifting and turning of the steel pipe pile is carried out by two main crane vessels lifting the main lifting lugs, and by an auxiliary crane vessel lifting the tail lifting point with a tail clamp, or by using a cross hook, with one end hooked to the main lifting lug and the other end hooked to the tail lifting point with a tail clamp. The steel pipe pile is lowered down until the tail touches the bottom, and the tail clamp automatically falls off by gravity. Then the two main lifting points are lifted to a vertical state, and then the pile driving operation is carried out.

[0004] During the hoisting and turning process, the method of hoisting and attaching the pipe pile to the tail end is mostly to clamp the edge of the pipe pile end. The attachment point is single, and under the action of the weight of the pipe pile, it will act on the clamping point. On the one hand, it increases the requirements for the attachment ability of the connecting tool. On the other hand, it will cause the connecting tool to generate interaction force with the local position of the pipe pile tail end, which increases the requirements for the anti-clamping ability of the local position of the pipe pile tail end. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies where, during the hoisting and flipping process, the tail end of the pipe pile is typically attached by clamping the edge of the pipe pile end. This results in a single attachment point, and the weight of the pipe pile exerts force on the clamping point, increasing the requirements for the attachment capability of the connecting tool and causing interaction forces between the connecting tool and the local area of ​​the pipe pile tail end, further increasing the requirements for the anti-clamping capability of the local area of ​​the pipe pile tail end. Therefore, this invention proposes a pile flipping device and method for offshore monopile foundation installation.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] Firstly, a pile-turning device and method for installing offshore monopile foundations includes a first traction assembly and a second traction assembly, and further includes: an inner clamping assembly, which includes an insert body, multiple inner clamps, and a pushing assembly; the insert body is inserted into the end cavity of the pipe pile, the multiple inner clamps are movably inserted into the insert body, and the pushing assembly is used for the multiple inner clamps to clamp the inner wall of the pipe pile cavity from the insert body outward; the insert body is pulled by the first traction assembly; and an outer connecting assembly, which is used to attach and connect to the middle position of the pipe pile surface, and the outer connecting assembly is pulled by the second traction assembly.

[0008] During the process of the first traction component pulling the clamping component, the end of the pipe pile is lifted up, and the second traction component supports the external connecting component until the pipe pile is in a vertical state. At this time, the axis of the plug body coincides with that of the pipe pile.

[0009] It should be understood that during the pile turning process, the external connecting component fixedly connected to the surface of the pipe pile is first pulled and supported by the second traction component. The external connecting component is fixed at the middle position of the extended trajectory of the pipe pile. Specifically, the middle position of the extended trajectory of the pipe pile is the first position in the figure.

[0010] Then the connector is inserted into the cavity at the end of the pipe pile, and the push assembly pushes multiple inner jaws to clamp the inner cavity at the end of the pipe pile at multiple points, and the first traction assembly pulls the connector.

[0011] During the flipping process, the first traction component pulls the outer connecting component to support the middle position of the pipe pile surface, the second traction component pulls the plug body to drive the pipe pile to flip, and then the second traction component unwinds the second traction rope to gradually support and adjust the flipping state of the pipe pile until the pipe pile is in a vertical state and keeps it in the same axis as the first traction rope.

[0012] It should be further explained that by setting multiple internal grippers, multi-point clamping support is achieved inside the pipe pile end. After the first traction component pulls the plug body to a vertical state, the plug body and the pipe pile are kept on the same axis. This helps to avoid the clamping point being biased to a single point on the edge of the pipe pile end, which would cause deflection when the pipe pile is lifted vertically. This helps to maintain the vertical traction support for the pipe pile.

[0013] In one embodiment, the first traction assembly includes: a hanger with a hook fixedly connected to its top; a first traction frame with a first take-up roller rotatably connected to its bottom end, a first traction rope wound onto the upper part of the first take-up roller, and an end of the first traction rope connected to an end of a connector; a first guide wheel rotatably connected to the bottom surface of the hanger and providing guidance and support for the first traction rope; and a first motor fixedly connected to the first traction frame, with its output end fixedly connected to the first take-up roller.

[0014] It should be understood that when it is necessary to pull the end of the pipe pile, the first motor is started, the first motor drives the first winding roller to rotate, the first winding roller winds up the first traction rope, and the first traction rope lifts the end of the pipe pile through the plug body. When the pipe pile is in a vertical state, the traction section of the first traction rope is kept collinear with the axis of the plug body and the pipe pile, which is conducive to maintaining the vertical traction support of the pipe pile.

[0015] Specifically, when the first traction rope pulls the connector and the pipe pile to a vertical position, the axes of the first traction rope, the connector, and the pipe pile are collinear.

[0016] In one embodiment, the external connection assembly includes: two support seats welded to both sides of the surface of the pipe pile; and two lifting rings fixedly connected to the ends of the two support seats, the two lifting rings being pulled by a second traction assembly.

[0017] In one embodiment, the second traction assembly includes: a second traction frame, which is fixedly mounted on the bottom of the hanger, with second take-up rollers rotatably connected to both ends of the bottom. Second traction ropes are wound onto the surfaces of both second take-up rollers, and the ends of the two second traction ropes are respectively connected to two lifting rings. The specific connection method between the second traction ropes and the lifting rings can be a common snap-ring connection binding method. A dual-axis motor is fixedly connected to the second traction frame, and its two output ends are respectively fixedly connected to the two second take-up rollers.

[0018] Two second guide wheels are rotatably connected to the bottom end of the bracket, and support and guide the two second traction ropes respectively.

[0019] It should be understood that during the process of traction support for the first position of the pipe pile, the dual-axis motor is started. The dual-axis motor synchronously drives the two second winding rollers to rotate. The two second winding rollers synchronously pull the second traction rope, thereby realizing synchronous traction of the pipe pile at the middle position in the length direction, that is, the first position in the figure, until the pipe pile is in a vertical state.

[0020] It should be further explained that during the process of the second traction component pulling the pipe pile, the second traction rope is wound up or unwound according to the state of the pipe pile after it is flipped. When the pipe pile is biased in the first direction, causing the axial direction of the pipe pile body and the first traction rope to be in a non-collinear state, the traction rope is unwound until the pipe pile, the first traction rope and the plug body are in a collinear state.

[0021] In one embodiment, the pushing assembly includes: a pushing cavity, which is formed inside the pushing cavity and has a pushing piston slidably disposed therein. The bottom end of the pushing piston has a plurality of pushing grooves corresponding to a plurality of inner jaws, and a linkage pin is fixedly connected inside the pushing connector groove; a plurality of inclined grooves, which are respectively formed on the surfaces of a plurality of inner jaws and are respectively slidably sleeved on the surfaces of a plurality of linkage pins; a one-way valve, which is fixedly connected to the end of the connector and communicates with the pushing cavity; and a venting control valve, which is fixedly connected to the end of the connector to control the venting of gas in the pushing cavity.

[0022] It should be understood that after the connector is inserted into the end cavity of the pipe pile, the venting is canceled by closing the venting control valve. Then, air is pumped into the one-way valve through the air pumping assembly. The air pressure will push the piston, which in turn drives the linkage pin to push the inclined groove, pushing multiple inner jaws synchronously outwards until they clamp the end cavity of the pipe pile, thus achieving multi-point synchronous clamping. During the multi-point clamping process, the connector and the pipe pile are aligned axially.

[0023] It should be noted that when it is necessary to disassemble the connector, the gas in the pushing chamber can be released by opening the vent control valve, which will cancel the pushing action, cancel the force on the internal grippers, and cancel the clamping, so that the connector can be pulled out for easy disassembly.

[0024] In one embodiment, the inner clamping jaw further includes: a mounting groove, which is formed on the clamping surface of the inner clamping jaw and communicates with the inclined groove; a movable jaw, which is rotatably connected in the mounting groove; and a linkage assembly, which is used to link the movable jaw to press against the inner wall of the pipe pile under the push of the linkage pin during the clamping process of the inner clamping jaw against the inner wall of the pipe pile.

[0025] It should be understood that during the process of pushing the piston to move the linkage pin in the inclined groove, the linkage pin acts on the linkage component. Under the push of the linkage pin, the linkage component links the movable claw to press against the inner wall of the pipe pile in a flipping trend, forming a clamping force that keeps the movable claw always applying an upward clamping force to the vertical inner wall of the pipe pile.

[0026] In one embodiment, the linkage component includes: a movable plate slidably connected in the mounting groove, the movable plate including a first segment and an elastic telescopic segment, the first segment being located in an inclined groove and having a first pushing inclined surface at its end, and a pushing pin being fixedly connected to the end of the elastic telescopic segment; and a linkage groove formed on the surface of the movable claw, the linkage groove being slidably sleeved on the surface of the pushing pin.

[0027] It should be understood that during the movement of the linkage pin within the inclined groove, the linkage pin pushes the first inclined surface of the first section of the moving plate, thus pushing the moving plate. Simultaneously, the moving plate drives the elastic telescopic section and the pushing pin to move. The pushing pin squeezes the linkage groove. After both the inner clamp and the movable claw clamp the inner wall of the pipe pile, the elastic telescopic section is in a compressed state. The elastic restoring force after compression of the elastic telescopic section will always act on the pushing pin, and the pushing pin will always act on the movable claw, applying a tendency force in the direction of rotation to the movable claw. This ensures that the movable claw always maintains an upward clamping force on the vertical inner wall of the pipe pile. The clamping force is not perpendicular to the inner wall of the pipe pile, but rather at a certain angle. This inclined clamping force helps to distribute stress more evenly, reducing stress concentration. Furthermore, the inclined clamping force helps to fix the inner clamp more firmly to the inner wall of the pipe pile.

[0028] In one embodiment, the elastic telescopic section includes: two telescopic grooves, which are formed on both sides of the first section and have fixedly connected limit blocks inside; two push frames, the ends of which are fixedly connected to push pins; the two push frames are slidably disposed in the two telescopic grooves respectively, and a support spring is fixedly connected between the two push frames and the two telescopic grooves respectively, and a limit groove is formed on the surface of each of the two push frames, and the two limit grooves are slidably sleeved on the surface of the two limit blocks respectively.

[0029] It should be understood that the support spring provides elastic support for the push frame on the first section of the moving plate, and the connection between the limit block and the limit groove restricts the extension and retraction direction of the push frame and the first section.

[0030] In one embodiment, rubber wedge blocks are fixedly connected to the clamping surfaces of both the movable claw and the inner claw. It should be understood that during the clamping process between the inner claw and the inner wall of the pipe pile, the inclined surface of the rubber wedge block will be compressed, and a force direction of upward oblique force will be formed, which is beneficial to further and more firmly fixing the inner claw to the inner wall of the pipe pile.

[0031] Secondly, a method for turning piles using a pile-turning device for installing marine monopile foundations is proposed, including the following steps:

[0032] Step 1, Attachment Connection: The outer connection component is used to attach the pipe pile to the middle position of the surface, and the second traction component pulls the outer connection component. The plug body is inserted into the inner cavity of the pipe pile end, and the pushing component pushes multiple inner claws to clamp the inner cavity of the pipe pile end at multiple points. The first traction component pulls the plug body.

[0033] Step 2, Flipping and Adjustment: The second traction component pulls the outer connecting component to support the middle position of the pipe pile surface. The first traction component pulls the plug body to drive the pipe pile to flip. Then, the second traction component unwinds the second traction rope to gradually support and adjust the flipping state of the pipe pile until the pipe pile is in a vertical state and keeps it on the same axis as the first traction rope.

[0034] Step 3, dismantling: After the pipe pile is flipped, the outer connecting component can be cut off from the surface of the pipe pile. By pushing the component, the pushing of multiple inner clamps is canceled, the clamping is canceled, and the inner clamping component is pulled out by the first traction component to complete the dismantling.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] This invention achieves multi-point clamping support inside the end of the pipe pile by setting multiple internal clamps. After the first traction component pulls the plug body to a vertical state, it keeps the plug body and the pipe pile on the same axis. This helps to avoid the clamping point being biased to a single point on the edge of the pipe pile end, which would cause deflection when the pipe pile is lifted vertically. This helps to maintain the vertical traction support of the pipe pile.

[0037] The venting is canceled by closing the venting control valve, and then air is pumped into the one-way valve through the air pumping assembly. The air pressure will push the piston, which in turn drives the linkage pin to push the inclined groove, pushing multiple inner jaws synchronously towards the outside of the connector until the inner cavity of the pipe pile end is clamped, thus achieving multi-point synchronous clamping. During the multi-point clamping process, the connector and the pipe pile are aligned axially.

[0038] During the process of pushing the piston to move the linkage pin in the inclined groove, the linkage pin acts on the linkage component. Under the push of the linkage pin, the linkage component moves the movable claw to press against the inner wall of the pipe pile with a flipping tendency, forming an upward clamping force on the inner wall of the vertical pipe pile. Attached Figure Description

[0039] Figure 1 This is a flowchart of the method of the present invention.

[0040] Figure 2 This is a schematic diagram of the first overall structure of the present invention.

[0041] Figure 3 for Figure 2 Enlarged view of section A in the middle.

[0042] Figure 4 This is an exploded view of the connector of the present invention.

[0043] Figure 5 This is a first structural cross-sectional view of the inner gripper of the present invention.

[0044] Figure 6 This is a schematic diagram of the structure of the movable plate and the movable claw of the present invention.

[0045] Figure 7 This is a schematic diagram of the connector structure of the present invention.

[0046] Figure 8 This is a structural schematic diagram of the pipe pile in the vertically lifted state of the present invention.

[0047] Figure 9 This is a cross-sectional view of the second structure of the inner gripper of the present invention.

[0048] Figure 10 This is a schematic diagram of the structure of the rubber wedge block of the present invention.

[0049] In the diagram: 1. Connector; 2. Inner gripper; 3. Hanger; 4. Hook; 5. First traction frame; 6. First winding roller; 7. First traction rope; 8. First motor; 9. First guide wheel; 10. Support seat; 11. Lifting ring; 12. Welding point; 13. Second traction frame; 14. Second winding roller; 15. Second traction rope; 16. Dual-axis motor; 17. Second guide wheel; 18. Push chamber; 19. Push piston; 20. Push groove; 21. Linkage pin; 22. Inclined groove; 23. One-way valve; 24. Vent control valve; 25. Mounting groove; 26. Movable gripper; 27. Moving plate; 27. First section 2701; 2702 elastic telescopic section; 2702 telescopic groove 270201; Limiting block 270202; Push frame 270203; Support spring 270204; Limiting groove 270205; Push pin 28; Linkage groove 29; Rubber wedge block 30; Pipe pile 31; First direction 34; Flipping direction 35; First position 36. Detailed Implementation

[0050] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0051] like Figures 2 to 10As shown in one embodiment, a pile-turning device for installing a marine monopile foundation includes a first traction assembly and a second traction assembly, and further includes: an inner clamping assembly, which includes a plug-in body 1, a plurality of inner clamping claws 2, and a pushing assembly. The plug-in body 1 is inserted into the end cavity of the pipe pile 31, the plurality of inner clamping claws 2 are movably inserted into the plug-in body 1, and the pushing assembly is used to clamp the inner wall of the pipe pile 31 cavity from the inside to the outside of the plug-in body 1. The plug-in body 1 is pulled by the first traction assembly; and an outer connecting assembly, which is used to attach and connect to the middle position of the surface of the pipe pile 31. The outer connecting assembly is pulled by the second traction assembly.

[0052] During the process of the first traction component pulling the clamping component, the end of the pipe pile 31 is lifted up, and the second traction component supports the external connecting component until the pipe pile 31 is in a vertical state. At this time, the insertion body 1 coincides with the axis a of the pipe pile 31.

[0053] It should be understood that during the pile turning process, the external connecting component inserted into the surface of the pipe pile 31 is first pulled and supported by the second traction component. The external connecting component is fixed at the middle position of the extended trajectory of the pipe pile 31. Specifically, the middle position of the extended trajectory of the pipe pile 31 is... Figure 8 The first position in the middle is 36;

[0054] Then the connector 1 is inserted into the cavity at the end of the pipe pile 31, and the multiple inner clamps 2 are pushed by the pushing component to clamp the inner cavity at the end of the pipe pile 31 at multiple points, and the connector 1 is pulled by the first traction component.

[0055] During the flipping process, the first traction component pulls the outer connecting component to support the middle position of the surface of the pipe pile 31. The second traction component pulls the plug body 1 to drive the pipe pile 31 to flip. Then, the second traction component unwinds the second traction rope 15 to gradually support and adjust the flipping state of the pipe pile 31 until the pipe pile 31 is in a vertical state and keeps it in the same axis a state as the first traction rope 7.

[0056] It should be further explained that by setting multiple inner clamps 2, multi-point clamping support is achieved for the inside of the end of the pipe pile 31. After the first traction component pulls the plug body 1 to pull the pipe pile 31 into a vertical state, the plug body 1 and the pipe pile 31 are kept in the same axis a state. This helps to avoid the clamping point being biased to a single point on the edge of the end of the pipe pile 31, which would cause deflection when it is lifted vertically. This helps to maintain the vertical traction support for the pipe pile 31.

[0057] like Figure 2 , Figure 4 and Figure 7As shown, in one embodiment, the first traction assembly includes: a bracket 3, with a hook 4 fixedly connected to the top of the bracket 3; a first traction frame 5, with a first take-up roller 6 rotatably connected to the bottom of the first traction frame 5, a first traction rope 7 wound on the upper part of the first take-up roller 6, and the end of the first traction rope 7 connected to the end of the plug body 1; a first guide wheel 9, which is rotatably connected to the bottom surface of the bracket 3 and provides guidance and support for the first traction rope 7; and a first motor 8, which is fixedly connected to the first traction frame 5, and its output end is fixedly connected to the first take-up roller 6.

[0058] It should be understood that when it is necessary to pull the end of the pipe pile 31, the first motor 8 is started, the first motor 8 drives the first winding roller 6 to rotate, the first winding roller 6 winds up the first traction rope 7, and the first traction rope 7 drives the end of the pipe pile 31 to rise through the plug body 1. When the pipe pile 31 is in a vertical state, the traction section of the first traction rope 7 is kept collinear with the axis a of the plug body 1 and the pipe pile 31, which is conducive to maintaining the vertical traction support of the pipe pile 31.

[0059] Specifically, when the first traction rope 7 pulls the connector 1 and the pipe pile 31 to a vertical position, as shown in 8, the axes a of the first traction rope 7, the connector 1 and the pipe pile 31 are collinear.

[0060] like Figure 2 and Figure 3 As shown, in one embodiment, the external connection assembly includes: two support seats 10, which are distributed and welded to both sides of the surface of the pipe pile 31; and two lifting rings 11, which are respectively fixedly connected to the ends of the two support seats 10. The two lifting rings 11 are pulled by a second traction assembly. Specifically, the two sides of the surface of the pipe pile 31 have welding points 12 that are welded to the support seats 10.

[0061] It should be understood that after the traction pile is completed, the welded support seat 10 is cut off from the welding point 12 to avoid obstructing the pile driving by removing the lifting ring 11 and the support seat 10.

[0062] like Figure 2 , Figure 3 and Figure 8As shown, in one embodiment, the second traction assembly includes: a second traction frame 13, which is fixedly installed at the bottom of the hanger 3, and has two second take-up rollers 14 rotatably connected to both ends of the bottom. Two second traction ropes 15 are wound onto the surfaces of the two second take-up rollers 14, and the ends of the two second traction ropes 15 are respectively connected to two lifting rings 11. The specific connection method between the second traction ropes 15 and the lifting rings 11 can be a common snap ring connection binding method; a dual-axis motor 16, which is fixedly connected to the second traction frame 13, and its two output ends are respectively fixedly connected to the two second take-up rollers 14; and two second guide wheels 17, which are rotatably connected to the bottom of the hanger 3, respectively supporting and guiding the two second traction ropes 15.

[0063] It should be understood that during the traction support of the first position 36 of the pipe pile 31, the dual-axis motor 16 is started. The dual-axis motor 16 synchronously drives the two second take-up rollers 14 to rotate, and the two second take-up rollers 14 synchronously pull the second traction rope 15, thereby achieving the middle position of the pipe pile 31 in the length direction, that is... Figure 8 The first position 36 in the middle is synchronously pulled until the pipe pile 31 is in a vertical state;

[0064] It should be further explained that during the process of the second traction component pulling the pipe pile 31, the second traction rope 15 is wound up or unwound according to the state of the pipe pile 31 after it is flipped. When the pipe pile 31 is biased towards the first direction 34, causing the axial direction of the pipe pile 31 and the first traction rope 7 to be in a non-collinear state, the traction rope is unwound until the pipe pile 31, the first traction rope 7 and the plug body 1 are in a collinear state.

[0065] like Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, in one embodiment, the pushing assembly includes: a pushing cavity 18, which is located inside the pushing cavity 18 and has a pushing piston 19 slidably disposed therein. The bottom end of the pushing piston 19 has a plurality of pushing grooves 20 corresponding to a plurality of inner jaws 2. A linkage pin 21 is fixedly connected in the groove 20 of the pushing connector 1; a plurality of inclined grooves 22, which are respectively opened on the surfaces of a plurality of inner jaws 2 and are respectively slidably sleeved on the surfaces of a plurality of linkage pins 21; a one-way valve 23, which is fixedly connected to the end of the connector 1 and communicates with the pushing cavity 18; and a venting control valve 24, which is fixedly connected to the end of the connector 1 to control the venting of gas in the pushing cavity 18.

[0066] Specifically, the end of the plug body 1 is sealed at the opening of the push cavity 18 by the cover body 32. The one-way valve 23 and the vent control valve 24 are fixedly connected to the cover body 32. The cover body 32 and the plug body 1 are fixed by bolts. A connecting ring 33 is also rotatably connected to the cover body 32. The connecting ring 33 is connected to the first traction rope. The specific connection method can be the common snap ring connection binding method.

[0067] It should be understood that after the connector 1 is inserted into the end cavity of the pipe pile 31, the venting is canceled by closing the venting control valve 24, and then the air pumping assembly pumps air into the one-way valve 23. The air pressure will push the piston 19, which in turn drives the linkage pin 21 to push the inclined groove 22, pushing multiple inner clamping claws 2 synchronously towards the outside of the connector 1 until the end cavity of the pipe pile 31 is clamped, thus achieving multi-point synchronous clamping. During the multi-point clamping process, the connector 1 and the pipe pile 31 are collinear in axis.

[0068] It should be noted that when it is necessary to disassemble the connector 1, the gas in the pushing chamber 18 can be released by opening the vent control valve 24, which will cancel the pushing action, cancel the force on the inner gripper 2, and cancel the clamping, so that the connector 1 can be pulled out for easy disassembly.

[0069] like Figures 2 to 6 As shown, in one embodiment, the inner clamping claw 2 further includes: a mounting groove 25, which is formed on the clamping surface of the inner clamping claw 2 and communicates with the inclined groove 22; a movable claw 26, which is rotatably connected in the mounting groove 25; and a linkage assembly, which is used to link the movable claw 26 to press against the inner wall of the pipe pile 31 in a flipping trend under the push of the linkage pin 21 during the clamping process of the inner clamping claw 2 on the inner wall of the pipe pile 31.

[0070] It should be understood that during the process of pushing the piston 19 to drive the linkage pin 21 to move in the inclined groove 22, the linkage pin 21 acts on the linkage component. Under the push of the linkage pin 21, the linkage component links the movable claw 26 to press against the inner wall of the pipe pile 31 with a flipping tendency, and exerts an upward clamping force on the inner wall of the vertical pipe pile 31.

[0071] like Figure 5 and Figure 6 As shown, in one embodiment, the linkage component includes: a movable plate 27, which is slidably connected in the mounting groove 25. The movable plate 27 includes a first segment 2701 and an elastic telescopic segment 2702. The first segment 2701 is located in the inclined groove 22 and has a first pushing inclined surface at its end. The end of the elastic telescopic segment 2702 is fixedly connected to a pushing pin 28; and a linkage groove 29, which is formed on the surface of the movable claw 26 and is slidably sleeved on the surface of the pushing pin 28.

[0072] It should be understood that during the movement of the linkage pin 21 within the inclined groove 22, the linkage pin 21 pushes the first pushing inclined surface of the first section 2701 of the moving plate 27, thus pushing the moving plate 27. Simultaneously, the moving plate 27 drives the elastic telescopic section 2702 and the pushing pin 28 to move. The pushing pin 28 then compresses the linkage groove 29. After both the inner clamping claw 2 and the movable claw 26 clamp the inner wall of the pipe pile 31, the elastic telescopic section 2702 is in a compressed state. The elastic restoring force of the compressed elastic telescopic section 2702... The push pin 28 will always act, and the push pin 28 will always act on the movable claw 26, applying a tendency force in the direction of rotation 35 to the movable claw 6, so that the movable claw 26 always maintains an upward clamping force on the inner wall of the vertical pipe pile 31. The clamping force is not perpendicular to the inner wall of the pipe pile 31, but at a certain angle. This clamping force in the direction of inclination helps to distribute stress more evenly, reduce stress concentration, and through the clamping force in the direction of inclination, it is beneficial for the inner claw 2 to be more firmly fixed on the inner wall of the pipe pile 31.

[0073] like Figure 5 and Figure 6 As shown, in one embodiment, the elastic telescopic section 2702 includes: two telescopic grooves 270201, which are formed on both sides of the first section 2701 and have fixedly connected limit blocks 270202 inside; two push frames 270203, the ends of which are fixedly connected to push pins 28; the two push frames 270203 are slidably disposed in the two telescopic grooves 270201 respectively, and support springs 270204 are fixedly connected between the two push frames 270203 and the two telescopic grooves 270201 respectively, and limit grooves 270205 are formed on the surface of the two push frames 270203 respectively, and the two limit grooves 270205 are slidably sleeved on the surface of the two limit blocks 270202 respectively.

[0074] It should be understood that the support of the support spring 270204 provides elastic support for the push frame 270203 on the first section 2701 of the moving plate 27. The connection between the limit block 270202 and the limit groove 270205 restricts the extension and retraction direction of the push frame 270203 and the first section 2701.

[0075] like Figure 9 As shown, in one embodiment, rubber wedge blocks 30 are fixedly connected to the clamping surfaces of both the movable claw 26 and the inner claw 2. It should be understood that during the clamping process between the inner claw 2 and the inner wall of the pipe pile 31, the inclined surface of the rubber wedge block 30 will be compressed, and a force direction of oblique upward will be formed, which is beneficial for the inner claw 2 to be more firmly fixed on the inner wall of the pipe pile 31.

[0076] like Figure 1As shown, a method for turning a pile using a pile-turning device for installing a marine monopile foundation includes the following steps:

[0077] Step 1, attachment connection: The outer connection component is used to attach the pipe pile 31 to the middle position of the surface, and the second traction component is used to pull the outer connection component. The plug body 1 is inserted into the inner cavity of the end of the pipe pile 31, and the pushing component pushes multiple inner claws 2 to clamp the inner cavity of the end of the pipe pile 31 at multiple points. The first traction component pulls the plug body 1.

[0078] Step 2, Flipping and Adjustment: The second traction component pulls the outer connecting component to support the middle position of the surface of the pipe pile 31. The first traction component pulls the plug body 1 to drive the pipe pile 31 to flip. Then, the second traction component unwinds the second traction rope 15 to gradually support and adjust the flipping state of the pipe pile 31 until the pipe pile 31 is in a vertical state and keeps it in the same axis a state as the first traction rope 7.

[0079] Step 3, dismantling: After the pipe pile 31 is flipped, the outer connecting component can be cut off from the surface of the pipe pile 31. The pushing component is used to release the pushing of multiple inner clamping claws 2, thus releasing the clamping. The inner clamping component is pulled out by the first traction component to complete the dismantling.

[0080] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A pile-turning device for installing offshore monopile foundations, comprising a first traction assembly and a second traction assembly, characterized in that: Also includes: The internal clamping assembly includes a plug body (1), multiple internal clamping claws (2) and a pushing assembly. The plug body (1) is inserted into the end cavity of the pipe pile (31). The multiple internal clamping claws (2) are movably inserted into the plug body (1). The pushing assembly is used for the multiple internal clamping claws (2) to clamp the inner wall of the pipe pile (31) cavity from the inside of the plug body (1) to the outside. The plug body (1) is pulled by a first traction assembly. An external connection assembly is used to attach and connect the pipe pile (31) to the middle position on the surface of the pipe pile (31), and the external connection assembly is pulled by a second traction assembly; During the process of the first traction component pulling the clamping component, the end of the pipe pile (31) is lifted up, and the second traction component supports the external connecting component until the pipe pile (31) is in a vertical state. At this time, the axis of the plug body (1) coincides with that of the pipe pile (31). The actuating component includes: Push cavity (18), the push cavity (18) is opened inside the plug body (1), and a push piston (19) is slidably arranged inside. The bottom end of the push piston (19) is provided with a plurality of push grooves (20) corresponding to a plurality of inner claws (2), and a linkage pin (21) is fixedly connected inside the push groove (20). Multiple inclined slots (22) are respectively opened on the surface of multiple inner jaws (2) and are respectively slidably sleeved on the surface of multiple linkage pins (21); One-way valve (23), which is fixedly connected to the end of the plug body (1) and connected to the push chamber (18); A venting control valve (24) is fixedly connected to the end of the plug body (1) to control the venting of gas in the push chamber (18); The inner gripper (2) also includes: Mounting groove (25), which is formed on the clamping surface of the inner jaw (2) and communicates with the inclined groove (22); Movable claw (26), the movable claw (26) is rotatably connected in the mounting groove (25); The linkage component is used to, during the process of the inner clamping claw (2) clamping the inner wall of the pipe pile (31), to link the movable claw (26) to press against the inner wall of the pipe pile (31) in a flipping trend under the push of the linkage pin (21); The linkage component includes: The movable plate (27) is slidably connected in the mounting groove (25). The movable plate (27) includes a first section (2701) and an elastic telescopic section (2702). The first section (2701) is located in the inclined groove (22) and has a first pushing inclined surface at its end. The end of the elastic telescopic section (2702) is fixedly connected to a pushing pin (28). Linkage groove (29), the linkage groove (29) is formed on the surface of the movable claw (26), and the linkage groove (29) is slidably sleeved on the surface of the push pin (28); Rubber wedge blocks (30) are fixedly connected to the clamping surfaces of the movable claw (26) and the inner claw (2).

2. The pile-turning device for offshore monopile foundation installation according to claim 1, characterized in that: The first traction component includes: Hanger (3), the top of which is fixedly connected to a hook (4); The first traction frame (5) has a first take-up roller (6) rotatably connected to its bottom end. The first take-up roller (6) has a first traction rope (7) wound on its upper end. The end of the first traction rope (7) is fixedly connected to the end of the plug body (1). The first motor (8) is fixedly connected to the first traction frame (5), and its output end is fixedly connected to the first take-up roller (6); The first guide wheel (9) is rotatably connected to the bottom surface of the bracket (3) and provides guidance and support for the first traction rope (7).

3. The pile-turning device for offshore monopile foundation installation according to claim 2, characterized in that: The external connection component includes: Two support seats (10) are welded to both sides of the surface of the pipe pile (31); Two lifting rings (11) are fixedly connected to the ends of two support seats (10) respectively, and the two lifting rings (11) are pulled by a second traction assembly.

4. The pile-turning device for offshore monopile foundation installation according to claim 3, characterized in that: The second traction component includes: The second traction frame (13) is fixedly installed at the bottom of the hanging frame (3), and the two ends of the bottom are rotatably connected to the second winding roller (14). The surfaces of the two second winding rollers (14) are wound with the second traction rope (15), and the ends of the two second traction ropes (15) are fixedly connected to the two lifting rings (11) respectively. A dual-axis motor (16) is fixedly connected to the second traction frame (13), and its two output ends are respectively fixedly connected to two second take-up rollers (14); Two second guide wheels (17) are rotatably connected to the bottom end of the bracket (3) to support and guide the two second traction ropes (15) respectively.

5. The pile-turning device for offshore monopile foundation installation according to claim 4, characterized in that: The elastic telescopic section (2702) includes: Two telescopic grooves (270201) are provided on both sides of the first section (2701) and have fixedly connected limit blocks (270202) inside. Two pushers (270203) are provided, and the ends of the two pushers (270203) are fixedly connected to push pins (28). The two pushers (270203) are slidably disposed in two telescopic grooves (270201). Support springs (270204) are fixedly connected between the two pushers (270203) and the two telescopic grooves (270201). Limiting grooves (270205) are provided on the surface of the two pushers (270203). The two limiting grooves (270205) are slidably sleeved on the surface of two limiting blocks (270202).

6. The pile-turning method for the pile-turning device used in the installation of offshore monopile foundations according to claim 1, characterized in that: Includes the following steps: Step 1, attachment connection: The middle position of the surface of the pipe pile (31) is attached and connected by the external connection component, and the external connection component is pulled by the second traction component. The plug body (1) is inserted into the inner cavity of the end of the pipe pile (31), and the push component pushes multiple inner claws (2) to clamp the inner cavity of the end of the pipe pile (31) at multiple points. The plug body (1) is pulled by the first traction component. Step 2, Flipping and Adjustment: The second traction component pulls the outer connecting component to support the middle position of the pipe pile (31) surface. The first traction component pulls the plug body (1) to drive the pipe pile (31) to flip. Then, the second traction component unwinds the second traction rope (15) to gradually support and adjust the flipping state of the pipe pile (31) until the pipe pile (31) is in a vertical state, keeping the plug body (1) and the pipe pile (31) on the same axis. Step 3, dismantling: After the pipe pile (31) is flipped, the outer connecting component can be cut off from the surface of the pipe pile (31). The push component cancels the push on the multiple inner clamps (2), the clamping is canceled, and the inner clamping component is pulled out by the first traction component to complete the dismantling.

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