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

Abstract

The invention relates to the technical field of offshore single pile construction, in particular to a pile turning device and method for offshore single pile foundation installation, and the pile turning device comprises a first traction assembly, a second traction assembly, an inner clamping assembly, an inserting body, a plurality of inner clamping jaws, a plurality of pushing assemblies and an outer connecting assembly. In the pile turning process, the outer connecting assembly fixedly connected to the surface of the pipe pile is pulled and supported through the second pulling assembly, the outer connecting assembly is fixed to the middle position of an extension track of the pipe pile, and the inserting body is inserted into a pipe cavity in the end of the pipe pile; the outer connecting assembly is pulled through the first traction assembly to support the middle position of the surface of the tubular pile, the inserting body is pulled through the second traction assembly to drive the tubular pile to turn over, the second traction assembly unwinds the second traction rope till the tubular pile is in a vertical state, and the tubular pile and the first traction rope are kept in the same axis state.

Description

Technical Field

[0001] The present invention relates to the field of offshore single-pile construction, and particularly to a pile-turning device and a pile-turning method for installing an offshore single-pile foundation. Background Art

[0002] The steel pipe piles used in offshore projects are characterized by long length and large weight. Their length is generally more than sixty or seventy meters, and the weight reaches more than a thousand tons. The steel pipe piles are generally fabricated into finished products in a land steel pipe pile processing factory and transported to the offshore construction site horizontally by a transport barge for pile driving.

[0003] When transporting the steel pipe piles, they are generally in a horizontal position. Before pile driving construction, 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 for pile driving operations. The specific construction plan is as follows: Usually, there are three lifting points on the pile body of the steel pipe pile: two main lifting lugs near the middle of the pile body and a tail lifting point, which are convenient for lifting, turning over, and standing the steel pipe pile. When lifting and turning over the steel pipe pile, two main lifting ships are used to lift the main lifting lugs, and an auxiliary lifting ship is used to lift the tail lifting point through a tail slipping clamp, or a cross hook is used, with one end hooked to the main lifting lug and the other end hooked to the tail lifting point through a tail slipping clamp. The steel pipe pile is lowered, the tail touches the bottom, and the tail slipping clamp automatically falls off by gravity. Then, the two main lifting points are lifted to achieve a vertical state, and then pile driving operations are carried out.

[0004] During the hoisting and flipping process, when attaching the tail of the pipe pile during hoisting, the method is mostly to clamp the edge of the pipe pile end. The attachment point is single, and under the action of the gravity of the pipe pile, it will act on the clamping point. On the one hand, it increases the requirement for the attachment ability of the connecting tool, and on the other hand, it will cause mutual forces between the connecting tool and the local position of the pipe pile tail, increasing the requirement for the anti-clamping ability of the local position of the pipe pile tail. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art that during the hoisting and flipping process, when attaching the tail of the pipe pile during hoisting, the method is mostly to clamp the edge of the pipe pile end. The attachment point is single, and under the action of the gravity of the pipe pile, it will act on the clamping point. On the one hand, it increases the requirement for the attachment ability of the connecting tool, and on the other hand, it will cause mutual forces between the connecting tool and the local position of the pipe pile tail, increasing the requirement for the anti-clamping ability of the local position of the pipe pile tail, and to propose a pile-turning device and a pile-turning method for installing an offshore single-pile foundation.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: In the first aspect, a pile turning device and a pile turning method for installing an offshore single pile foundation include a first traction assembly and a second traction assembly, and also include: an inner clamping assembly, the inner clamping assembly includes an insert body, a plurality of inner clamping claws and a pushing assembly, the insert body is inserted into the end tube cavity of the pipe pile, a plurality of the inner clamping claws are movably inserted into the insert body, the pushing assembly is used for the plurality of inner clamping claws to clamp the inner wall of the pipe pile cavity from the insert body to the outside, and the insert body is pulled by the first traction assembly; an outer connection assembly, the outer connection assembly is used to attach and connect the middle position of the surface of the pipe pile, and the outer connection assembly is pulled by the second traction assembly; In the process of the first traction component pulling the inner clamping component, the end of the pipe pile is lifted, and the second traction component supports the external connection component until the pipe pile is in a vertical state. At this time, the axis of the plug-in body coincides with the axis of the pipe pile.

[0007] It should be understood that in the process of turning the pile, the outer connection component fixedly connected to the surface of the pipe pile is first pulled and supported by the second traction component, and the outer connection component is fixed at the middle position of the extended track of the pipe pile. Specifically, the middle position of the extended track of the pipe pile is the first position in the figure; Then the plug-in body is inserted into the tube cavity of the end of the pipe pile, and the inner cavity of the end of the pipe pile is clamped at multiple points by pushing the multiple inner clamping claws through the pushing component, and the plug-in body is pulled by the first pulling component; During the flipping process, the first traction component pulls the outer connection component to support the middle position of the surface of the pile, and the second traction component pulls the plug-in body to drive the pile to flip. Then, the second traction component unwinds the second traction rope to gradually support and adjust the flipping state of the pile until the pile is in a vertical state and keeps the same axis as the first traction rope. It should be further explained that, by setting up multiple internal clamping claws, multi-point clamping support is achieved for the inside of the pipe pile end, and after the first traction component pulls the plug-in body and pulls the pipe pile body into a vertical state, the plug-in body and the pipe pile are kept in the same axial state, which is beneficial to avoid the clamping point being biased towards a single point on the edge of the pipe pile end and causing deflection in the vertical lifting state, which is beneficial to maintaining the vertical traction support for the pipe pile.

[0008] In one embodiment, the first traction assembly includes: a hanging bracket, a hook is fixedly connected to the top of the hanging bracket; a first traction frame, a first winding roller is rotatably connected to the bottom end of the first traction frame, a first traction rope is wound on the top of the first winding roller, and an end of the first traction rope is connected to the end of the plug-in body; a first guide wheel, the first guide wheel is rotatably connected to the bottom surface of the hanging bracket and guides and supports the first traction rope; a first motor, the first motor is fixedly connected to the first traction frame, and an output end is fixedly connected to the first winding roller.

[0009] It should be understood that when it is necessary to tow 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 the first towing rope. The first towing rope drives the end of the pipe pile to rise through the plug-in body. When the pipe pile is in a vertical state, keep the towing section of the first towing rope collinear with the axes of the plug-in body and the pipe pile, which is beneficial to maintaining the towing support in the vertical direction of the pipe pile; Specifically, when the first towing rope towes the plug-in body and the pipe pile to a vertical state, the first towing rope, the plug-in body and the axis of the pipe pile body are in a collinear state.

[0010] In one embodiment, the outer connection assembly includes: two support seats welded to both sides of the surface of the pipe pile; two lifting rings, and the two lifting rings are respectively fixedly connected to the ends of the two support seats, and the two lifting rings are towed by a second towing assembly.

[0011] In one embodiment, the second towing assembly includes: a second towing frame fixedly installed at the bottom of the hanging frame, and second winding rollers are rotatably connected to both ends of the bottom. Second towing ropes are wound on the surfaces of the two second winding rollers, and the end parts of the two second towing ropes are respectively connected to the two lifting rings; The specific connection method between the second towing rope and the lifting ring can be connected by the general snap ring connection bundling method. A dual-axis motor fixedly connected to the second towing frame, and the two output ends are respectively fixedly connected to the two second winding rollers; Two second guiding wheels are rotatably connected to the bottom end of the hanging frame to respectively support and guide the two second towing ropes.

[0012] It should be understood that during the process of towing and supporting the first position of the pipe pile body, 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 tow the second towing rope, thereby realizing synchronous towing of the middle position of the pipe pile in the length direction, that is, the first position in the figure, until the pipe pile is in a vertical state; It should be further noted that during the process of the second towing assembly towing the pipe pile, the second towing rope is wound or unwound according to the state of the pipe pile body after flipping. When the pipe pile deviates in the first direction, resulting in a non-collinear state between the pipe pile body and the axis of the first towing rope, the towing rope is unwound until the pipe pile is collinear with the first towing rope and the plug-in body.

[0013] In one embodiment, the pushing assembly includes: a pushing chamber which is opened inside the [specific part not mentioned], and a pushing piston is slidably arranged inside the pushing chamber. A plurality of pushing grooves corresponding to the plurality of inner clamping jaws are opened at the bottom end of the pushing piston, and a linkage pin is fixedly connected inside the pushing insertion body groove; a plurality of inclined grooves which are respectively opened on the surfaces of the plurality of inner clamping jaws and are respectively slidably sleeved on the surfaces of the plurality of linkage pins; a one-way valve which is fixedly communicated with the end of the insertion body and is communicated with the pushing chamber; and a deflation control valve which is fixedly communicated with the end of the insertion body to control the deflation of the gas in the pushing chamber.

[0014] It should be understood that after the insertion body is inserted into the inner cavity of the end of the pipe pile, by closing the deflation control valve to cancel deflation, and then pumping gas into the one-way valve through the gas pumping assembly, the air pressure will push the pushing piston. The pushing piston drives the linkage pin to push the inclined groove, and synchronously pushes the plurality of inner clamping jaws towards the outside of the insertion body until the inner cavity of the end of the pipe pile is clamped, realizing multi-point synchronous clamping. During the process of realizing multi-point clamping, the insertion body and the axis of the pipe pile are collinear.

[0015] It should be noted that when it is necessary to disassemble the insertion body, by opening the deflation control valve to release the gas in the pushing chamber, the pushing can be cancelled, the acting force on the inner clamping jaws can be cancelled, and the clamping can be cancelled, and then the insertion body can be pulled out, which is convenient for disassembly.

[0016] In one embodiment, the inner clamping jaw further includes: a mounting groove which is opened on the clamping surface of the inner clamping jaw and is communicated with the inclined groove; a movable jaw which is rotatably connected inside the mounting groove; and a linkage assembly which is used for driving the movable jaw to abut against the inner wall of the pipe pile in a flipping trend under the push of the linkage pin during the process of the inner clamping jaw clamping the inner wall of the pipe pile.

[0017] It should be understood that during the process of the pushing piston driving the linkage pin to move in the inclined groove, the linkage pin acts on the linkage assembly, and the linkage assembly drives the movable jaw to abut against the inner wall of the pipe pile in a flipping trend under the push of the linkage pin, forming a clamping force that always keeps the movable jaw clamping the inner wall of the vertical pipe pile obliquely upward.

[0018] In one embodiment, the linkage assembly includes: a moving plate which is slidably connected inside the mounting groove. The moving plate includes a first section and an elastic telescopic section. The first section is located inside the inclined groove and has a first pushing inclined surface at its end, and a pushing pin is fixedly connected to the end of the elastic telescopic section; a linkage groove which is opened on the surface of the movable jaw, and the linkage groove is slidably sleeved on the surface of the pushing pin.

[0019] It should be understood that during the movement of the linkage pin within the inclined groove, the linkage pin will push the first pushing inclined surface of the first section of the moving plate, thereby pushing the moving plate. The moving plate synchronously drives the elastic telescopic section and the pushing pin to move. The pushing pin will extrude the linkage groove. After both the inner clamping jaw and the movable jaw clamp the inner wall of the pipe pile, the elastic telescopic section is in a compressed state. The elastic restoring force after the compression of the elastic telescopic section will always act on the pushing pin, and the pushing pin will always act on the movable jaw, applying a tendency force in the flipping direction to the movable jaw, so that the movable jaw always maintains an obliquely upward clamping force on the inner wall of the vertically placed pipe pile. The clamping force is not perpendicular to the inner wall of the pipe pile, but forms a certain inclination angle. This clamping force in the inclined direction helps to distribute the stress more evenly and reduce the phenomenon of stress concentration. Moreover, due to the clamping force in the inclined direction, it is beneficial for the inner clamping jaw to be more firmly fixed on the inner wall of the pipe pile.

[0020] In one embodiment, the elastic telescopic section includes: two telescopic grooves, which are opened on both sides of the first section and internally fixedly connected with limiting blocks; two pushing frames, the ends of the two pushing frames are fixedly connected to the pushing pin; the two pushing frames are respectively slidably arranged in the two telescopic grooves, and support springs are fixedly connected between the two pushing frames and the two telescopic grooves respectively. Moreover, limiting grooves are opened on the surfaces of the two pushing frames, and the two limiting grooves are respectively slidably sleeved on the surfaces of the two limiting blocks.

[0021] It should be understood that through the support of the support spring, the pushing frame is elastically supported on the first section of the moving plate. Through the connection between the limiting block and the limiting groove, the telescopic direction of the pushing frame and the first section is restricted.

[0022] In one embodiment, rubber wedge-shaped blocks are fixedly connected to the clamping surfaces of the movable jaw and the inner clamping jaw. It should be understood that during the clamping process of the inner clamping jaw and the inner wall of the pipe pile, the inclined surface of the rubber wedge-shaped block will be extruded, and further form an obliquely upward acting force direction, which is beneficial for the inner clamping jaw to be more firmly fixed on the inner wall of the pipe pile.

[0023] In a second aspect, a pile turning method for a pile turning device used for offshore monopile foundation installation is proposed, including the following steps: Step 1, attachment connection: Attach and connect to the middle position of the surface of the pipe pile through the outer connection component, and the second traction component tractions the outer connection component. By inserting the plug-in body into the inner cavity at the end of the pipe pile, and the pushing component pushes multiple inner clamping jaws to perform multi-point clamping on the inner cavity at the end of the pipe pile, and the first traction component tractions the plug-in body; Step 2, flipping adjustment: The outer connection component is pulled by the first traction component to support the middle position on the surface of the pipe pile. The insertion body is pulled by the second traction component to drive the pipe pile to flip. Then, by paying out the second traction rope of the second traction component, the flipping state of the pipe pile is gradually supported and adjusted until the pipe pile is in a vertical state and remains on the same axis as the first traction rope. Step 3, removal: After the pipe pile flipping is completed, the outer connection component can be cut off from the surface of the pipe pile. The pushing of the multiple inner clamping jaws is cancelled by the pushing component to cancel the clamping. The inner clamping component is pulled out by the first traction component to complete the removal.

[0024] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by providing multiple inner clamping jaws, multi-point clamping support inside the end of the pipe pile is achieved. And after the insertion body is pulled by the first traction component to make the pipe pile body in a vertical state, the insertion body and the pipe pile are kept on the same axis, which is beneficial to avoiding the deflection when vertically lifting due to the clamping point being biased towards a single point on the edge of the pipe pile end, and thus is beneficial to maintaining the vertical traction support for the pipe pile. 2. By closing the air release control valve to cancel air release, and then pumping air into the one-way valve through the air pumping component, the air pressure will push the push piston. The push piston drives the linkage pin to push the inclined slot, and multiple inner clamping jaws are synchronously pushed outwards of the insertion body until the inner cavity of the pipe pile end is clamped, realizing multi-point synchronous clamping. During the process of realizing multi-point clamping, the axial alignment of the insertion body and the pipe pile is achieved. 3. During the process of the push piston driving the linkage pin to move in the inclined slot, the linkage pin acts on the linkage component. The linkage component drives the movable claw to abut against the inner wall of the pipe pile with a flipping trend under the push of the linkage pin, forming a clamping trend force obliquely upwards on the inner wall of the vertically placed pipe pile. Description of the drawings

[0025] Figure 1 is the method flow chart of the present invention.

[0026] Figure 2 is the first overall structure schematic diagram of the present invention.

[0027] Figure 3 is Figure 2 the enlarged view of part A in

[0028] Figure 4 is the exploded view of the insertion body of the present invention.

[0029] Figure 5 is the first structural sectional view of the inner clamping jaw of the present invention.

[0030] Figure 6 is the structural schematic diagram of the moving plate and the movable claw of the present invention.

[0031] Figure 7 It is a schematic structural diagram of the plug-in body of the present invention.

[0032] Figure 8 It is a structural schematic diagram of the pipe pile of the present invention in a vertically hoisted state.

[0033] Figure 9 It is a second structural cross-sectional view of the inner clamping jaw of the present invention.

[0034] Figure 10 It is a schematic structural diagram of the rubber wedge block of the present invention.

[0035] In the figure: plug-in body 1, inner clamping claw 2, hanging rack 3, hook 4, first traction frame 5, first winding roller 6, first traction rope 7, first motor 8 8, first guide wheel 9, support seat 10, lifting ring 11, welding point 12, second traction frame 13, second winding roller 14, second traction rope 15, double-axis motor 16, second guide wheel 17, pushing chamber 18, pushing piston 19, pushing groove 20, linkage pin 21, inclined groove 22, one-way valve 23, air release control valve 24, installation groove 25, movable claw 26, movable plate 27, first section 2701, elastic telescopic section 2702, telescopic groove 270201, limit block 270202, pushing frame 270203, support spring 270204, limit groove 270205, pushing pin 28, linkage groove 29, rubber wedge block 30, pipe pile 31, first direction 34, flip direction 35, first position 36. DETAILED DESCRIPTION

[0036] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0037] like Figures 2 to 10 As shown, in one embodiment, a pile turning device for installing an offshore monopile foundation includes a first traction assembly and a second traction assembly, and further includes: an inner clamping assembly, the inner clamping assembly includes an insert body 1, a plurality of inner clamping claws 2 and a pushing assembly, the insert body 1 is inserted into the end tube cavity of a pipe pile 31, the plurality of inner clamping claws 2 are movably inserted on the insert body 1, the pushing assembly is used for the plurality of inner clamping claws 2 to clamp the inner wall of the tube cavity of the pipe pile 31 from the inside of the insert body 1 to the outside, and the insert body 1 is pulled by the first traction assembly; an outer connection assembly, the outer connection assembly is used to attach and connect the middle position of the surface of the pipe pile 31, and the outer connection assembly is pulled by the second traction assembly; In the process of the first traction component pulling the inner clamping component, the end of the pipe pile 31 is lifted, and the second traction component supports the external connection component until the pipe pile 31 is in a vertical state. At this time, the axis a of the plug-in body 1 coincides with the axis a of the pipe pile 31.

[0038] It should be understood that during the piling turning process, first, the outer connection component inserted on the surface of the pipe pile 31 is traction-supported by the second traction component. The outer connection 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 36 in Then, the plug-in body 1 is inserted into the inner cavity of the end of the pipe pile 31, and the pushing component is used to push multiple inner clamping jaws 2 to perform multi-point clamping on the inner cavity of the end of the pipe pile 31, and the first traction component tractions the plug-in body 1; During the turning process, the outer connection component is tractioned by the first traction component to support the middle position on the surface of the pipe pile 31. The second traction component pulls the plug-in body 1 to drive the pipe pile 31 to turn. Then, by paying out the second traction rope 15 through the second traction component, the turning state of the pipe pile 31 is gradually supported and adjusted until the pipe pile 31 is in a vertical state and remains in the same axis a state as the first traction rope 7; It should be further noted that by arranging multiple inner clamping jaws 2, multi-point clamping support for the inside of the end of the pipe pile 31 is achieved. And after the first traction component tractions the plug-in body 1 to make the pipe pile 31 body in a vertical state, the plug-in body 1 and the pipe pile 31 are kept in the same axis a state, which is beneficial to avoiding the deflection when vertically lifted due to the clamping point being biased towards a single point on the edge of the end of the pipe pile 31, and thus is beneficial to maintaining the vertical traction support for the pipe pile 31.

[0039] As Figure 2 、 Figure 4 and Figure 7 shown, in one embodiment, the first traction component includes: a hanging frame 3, with a hook 4 fixedly connected to the top of the hanging frame 3; a first traction frame 5, with a first winding roller 6 rotatably connected to the bottom end of the first traction frame 5. The first traction rope 7 is wound on the first winding roller 6, and the end of the first traction rope 7 is connected to the end of the plug-in body 1; a first guiding wheel 9, rotatably connected to the bottom surface of the hanging frame 3 and guiding and supporting the first traction rope 7; a first motor 8, fixedly connected to the first traction frame 5 and the output end is fixedly connected to the first winding roller 6.

[0040] It should be understood that when it is necessary to traction 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 the first traction rope 7. The first traction rope 7 drives the end of the pipe pile 31 to be lifted through the plug-in body 1. When the pipe pile 31 is in a vertical state, keeping the traction section of the first traction rope 7 collinear with the axis a of the plug-in body 1 and the pipe pile 31 is beneficial to maintaining the vertical traction support for the pipe pile 31; Specifically, when the first towing rope 7 towes the plug-in body 1 and the pipe pile 31 to the vertical state, as shown in Figure 8, the axes a of the first towing rope 7, the plug-in body 1 and the pipe pile 31 are collinear.

[0041] As Figure 2 and Figure 3 shown, in one embodiment, the outer connection assembly includes: two support seats 10, and the two support seats 10 are distributively welded on both sides of the surface of the pipe pile 31; two lifting rings 11, and the two lifting rings 11 are respectively fixedly connected to the ends of the two support seats 10, and the two lifting rings 11 are towed by a second towing assembly. Specifically, there are welding points 12 on both sides of the surface of the pipe pile 31 for welding with the support seats 10; It should be understood that after the pile hoisting by towing is completed, the welded support seats 10 are cut off from the welding points 12 to avoid the lifting rings 11 and the support seats 10 from obstructing the pile sinking.

[0042] As Figure 2 , Figure 3 and Figure 8 shown, in one embodiment, the second towing assembly includes: a second towing frame 13, the second towing frame 13 is fixedly installed at the bottom of the hanging frame 3, and both ends of the bottom are rotatably connected with second winding rollers 14. Second towing ropes 15 are wound on the surfaces of the two second winding rollers 14, and the end parts of the two second towing ropes 15 are respectively connected with the two lifting rings 11; the specific connection method between the second towing rope 15 and the lifting ring 11 can be connected by the general snap ring connection and bundling method; a biaxial motor 16, the biaxial motor 16 is fixedly connected to the second towing frame 13, and the two output ends are respectively fixedly connected with the two second winding rollers 14; two second guiding wheels 17, the two second guiding wheels 17 are rotatably connected to the bottom end of the hanging frame 3, and respectively support and guide the two second towing ropes 15.

[0043] It should be understood that during the process of towing and supporting the first position 36 of the pipe pile 31, the biaxial motor 16 is started, and the biaxial motor 16 synchronously drives the two second winding rollers 14 to rotate. The two second winding rollers 14 synchronously tow the second towing ropes 15, so as to realize synchronous towing of the middle position of the pipe pile 31 in the length direction, that is, Figure 8 the first position 36 in, until the pipe pile 31 is in the vertical state; It should be further noted that during the process of the second towing assembly towing the pipe pile 31, the second towing rope 15 is wound or unwound according to the state of the pipe pile 31 after the flipping state. When the pipe pile 31 deflects in the first direction 34, resulting in a non-collinear state between the axis of the pipe pile 31 and the first towing rope 7, the towing rope is unwound until the pipe pile 31 is collinear with the first towing rope 7 and the plug-in body 1.

[0044] AsFigure 2 , Figure 4 , Figure 5 and Figure 7 As shown in Figure 2 , Figure 4 , Figure 5 and Figure 7 , in one embodiment, the pushing component includes: a pushing chamber 18, which is opened inside, and a pushing piston 19 is slidably arranged inside. A plurality of pushing grooves 20 corresponding to the plurality of inner clamping jaws 2 are opened at the bottom end of the pushing piston 19, and a linkage pin 21 is fixedly connected inside the pushing groove 20 of the pushing insertion body 1; a plurality of inclined grooves 22 are respectively opened on the surfaces of the plurality of inner clamping jaws 2 and are respectively sleeved on the surfaces of the plurality of linkage pins 21 in a sliding manner; a one-way valve 23 is fixedly communicated with the end of the insertion body 1 and is communicated with the pushing chamber 18; a deflation control valve 24 is fixedly communicated with the end of the insertion body 1 to control the deflation of the gas in the pushing chamber 18.

[0045] Specifically, the opening of the insertion body 1 corresponding to the pushing chamber 18 is sealed by a cover body 32. The one-way valve 23 and the deflation control valve 24 are fixedly communicated with the cover body 32. The cover body 32 is fixed to the insertion body 1 by bolts, and a connecting ring 33 is rotatably connected to the cover body 32. The connecting ring 33 is connected to the first towing rope. The specific connection method can adopt the general snap ring connection and bundling method for connection.

[0046] It should be understood that after the insertion body 1 is inserted into the inner cavity of the end of the pipe pile 31, by closing the deflation control valve 24 to cancel deflation, and then pumping gas into the one-way valve 23 through the gas pumping component, the air pressure will push the pushing piston 19. The pushing piston 19 drives the linkage pin 21 to push the inclined groove 22, and synchronously pushes the plurality of inner clamping jaws 2 to the outside of the insertion body 1 until the inner cavity of the end of the pipe pile 31 is clamped, realizing multi-point synchronous clamping. During the process of realizing multi-point clamping, the insertion body 1 and the pipe pile 31 are axially collinear.

[0047] It should be noted that when it is necessary to disassemble the insertion body 1, by opening the deflation control valve 24 to release the gas in the pushing chamber 18, the pushing can be cancelled, the acting force on the inner clamping jaws 2 can be cancelled, and the clamping can be cancelled, and then the insertion body 1 can be towed out, which is convenient for disassembly.

[0048] As Figures 2 to 6 shown, in one embodiment, the inner clamping jaw 2 further includes: a mounting groove 25, which is opened on the clamping surface of the inner clamping jaw 2 and is communicated with the inclined groove 22; a movable jaw 26, which is rotatably connected in the mounting groove 25; a linkage component, which is used for driving the movable jaw 26 to abut against the inner wall of the pipe pile 31 in a turning trend under the push of the linkage pin 21 during the process of the inner clamping jaw 2 clamping the inner wall of the pipe pile 31.

[0049] It should be understood that during the process of the driving piston 19 driving the linkage pin 21 to move in the inclined groove 22, the linkage pin 21 acts on the linkage assembly, and the linkage assembly drives the movable claw 26 under the push of the linkage pin 21 to abut against the inner wall of the pipe pile 31 with a tendency to flip, exerting an obliquely upward clamping tendency force on the inner wall of the vertically placed pipe pile 31.

[0050] As Figure 5 and Figure 6 shown, in one embodiment, the linkage assembly includes: a moving plate 27, which is slidably connected in the installation groove 25. The moving 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. A pushing pin 28 is fixedly connected to the end of the elastic telescopic section 2702; a linkage groove 29 is opened on the surface of the movable claw 26, and the linkage groove 29 is slidably sleeved on the surface of the pushing pin 28.

[0051] It should be understood that during the process of the linkage pin 21 moving in the inclined groove 22, the linkage pin 21 will push the first pushing inclined surface of the first section 2701 of the moving plate 27 to push the moving plate 27. The moving plate 27 synchronously drives the elastic telescopic section 2702 and the pushing pin 28 to move. The pushing pin 28 will squeeze 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 after the compression of the elastic telescopic section 2702 will always act on the pushing pin 28, and the pushing pin 28 will always act on the movable claw 26, applying a tendency force in the flipping direction 35 to the movable claw 6, so that the movable claw 26 always maintains an obliquely upward clamping force on the inner wall of the vertically placed pipe pile 31. The clamping force is not perpendicular to the inner wall of the pipe pile 31, but at a certain inclination angle. This clamping force in the inclined direction helps to distribute the stress more evenly and reduce the phenomenon of stress concentration. And through the clamping force in the inclined direction, it is beneficial for the inner clamping claw 2 to be more firmly fixed on the inner wall of the pipe pile 31.

[0052] As Figure 5 and Figure 6 shown, in one embodiment, the elastic telescopic section 2702 includes: two telescopic grooves 270201, which are opened on both sides of the first section 2701 and are fixedly connected with limiting blocks 270202 inside; two pushing frames 270203, the ends of the two pushing frames 270203 are fixedly connected to the pushing pin 28; the two pushing frames 270203 are respectively slidably arranged in the two telescopic grooves 270201, and support springs 270204 are fixedly connected between the two pushing frames 270203 and the two telescopic grooves 270201 respectively. And limiting grooves 270205 are opened on the surfaces of the two pushing frames 270203, and the two limiting grooves 270205 are respectively slidably sleeved on the surfaces of the two limiting blocks 270202.

[0053] It should be understood that through the support of the support spring 270204, the push frame 270203 is elastically supported on the first section 2701 of the moving plate 27. Through the connection between the limit block 270202 and the limit groove 270205, the telescopic directions of the push frame 270203 and the first section 2701 are restricted.

[0054] As Figure 9 As shown, in one embodiment, rubber wedge blocks 30 are fixedly connected to the clamping surfaces of the movable claws 26 and the inner clamping claws 2. It should be understood that during the clamping process of the inner clamping claws 2 and the inner wall of the pipe pile 31, the inclined surfaces of the rubber wedge blocks 30 will be squeezed, and further form an upward inclined acting force direction, which is beneficial to the inner clamping claws 2 being further firmly fixed on the inner wall of the pipe pile 31.

[0055] As Figure 1 As shown, a pile turning method for a pile turning device for installing an offshore monopile foundation includes the following steps: Step 1, attachment connection: Attach and connect to the middle position of the surface of the pipe pile 31 through an external connection component, and the second traction component traction the external connection component. Insert the plug-in body 1 into the inner cavity of the end of the pipe pile 31, and the push component pushes multiple inner clamping claws 2 to perform multi-point clamping on the inner cavity of the end of the pipe pile 31, and the first traction component traction the plug-in body 1. Step 2, flipping adjustment: The first traction component traction the external connection component to support the middle position of the surface of the pipe pile 31. The second traction component pulls the plug-in body 1 to drive the pipe pile 31 to flip. Then, through the second traction component to unwind the second traction rope 15, gradually support and adjust the flipping state of the pipe pile 31 until the pipe pile 31 is in a vertical state and remains in the same axis a state as the first traction rope 7. Step 3, removal: After the pipe pile 31 is flipped, the external connection component can be cut off from the surface of the pipe pile 31. Cancel the push on the multiple inner clamping claws 2 through the push component to cancel the clamping. The first traction component pulls out the inner clamping component to complete the removal.

Claims

1. The pile turning device for installing the offshore monopile foundation, comprising a first traction assembly and a second traction assembly, is characterized in that: It further includes: An inner clamping assembly, the inner clamping assembly includes a plug-in body (1), a plurality of inner clamping jaws (2) and a pushing assembly. The plug-in body (1) is inserted into the end cavity of the pipe pile (31). A plurality of the inner clamping jaws (2) are movably inserted on the plug-in body (1). The pushing assembly is used to clamp the inner wall of the cavity of the pipe pile (31) from the inside of the plug-in body (1) outward. The plug-in body (1) is pulled by a first traction assembly; An outer connection assembly, the outer connection assembly is used for attaching and connecting to the middle position of the surface of the pipe pile (31). The outer connection assembly is pulled by a second traction assembly; Wherein, during the process of the first traction assembly pulling the inner clamping assembly, the end of the pipe pile (31) is lifted, and the second traction assembly supports the outer connection assembly until the pipe pile (31) is in a vertical state. At this time, the plug-in body (1) coincides with the axis (a) of the pipe pile (31).

2. The pile-turning device for installing the offshore monopile foundation according to claim 1, characterized in that: The first traction assembly includes: A hanging frame (3), the top of the hanging frame (3) is fixedly connected with a hook (4); A first traction frame (5), the bottom end of the first traction frame (5) is rotatably connected with a first winding roller (6). A first traction rope (7) is wound on the first winding roller (6). The end of the first traction rope (7) is fixedly connected to the end of the plug-in body (1); A first motor (8), the first motor (8) is fixedly connected to the first traction frame (5), and the output end is fixedly connected to the first winding roller (6); A first guiding wheel (9), the first guiding wheel (9) is rotatably connected to the bottom surface of the hanging frame (3), and guides and supports the first traction rope (7).

3. The pile turning device for installing the offshore monopile foundation according to claim 2, characterized in that: The outer connection assembly includes: Two support seats (10), the two support seats (10) are welded on both sides of the surface of the pipe pile (31); Two lifting rings (11), the two lifting rings (11) 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.

4. The pile turning device for installing the offshore monopile foundation according to claim 3, characterized in that: The second traction assembly includes: A second traction frame (13), the second traction frame (13) is fixedly installed at the bottom of the hanging frame (3), and both ends of the bottom are rotatably connected with second winding rollers (14). Second traction ropes (15) are wound on the surfaces of the two second winding rollers (14). The ends of the two second traction ropes (15) are respectively fixedly connected to the two lifting rings (11); A double-shaft motor (16), the double-shaft motor (16) is fixedly connected to the second traction frame (13), and the two output ends are respectively fixedly connected to the two second winding rollers (14); Two second guiding wheels (17), the two second guiding wheels (17) are rotatably connected to the bottom end of the hanging frame (3), and respectively support and guide the two second traction ropes (15).

5. The pile-turning device for installing the offshore monopile foundation according to claim 4, wherein: The pushing assembly includes: A driving chamber (18) is provided inside the plug-in body (1). A driving piston (19) is slidably arranged inside the driving chamber (18). A plurality of driving grooves (20) corresponding to the plurality of inner clamping jaws (2) are formed at the bottom end of the driving piston (19), and a linkage pin (21) is fixedly connected inside the driving grooves (20). A plurality of inclined grooves (22) are respectively formed on the surfaces of the plurality of inner clamping jaws (2), and are respectively slidably sleeved on the surfaces of the plurality of linkage pins (21). A one-way valve (23) is fixedly communicated with the end of the plug-in body (1) and is communicated with the driving chamber (18). An air release control valve (24) is fixedly communicated with the end of the plug-in body (1) to control the air release in the driving chamber (18).

6. The pile-turning device for installing an offshore monopile foundation according to claim 5, characterized in that: The inner clamping jaw (2) further includes: An installation groove (25) is formed on the clamping surface of the inner clamping jaw (2) and is communicated with the inclined groove (22). A movable claw (26) is rotatably connected inside the installation groove (25). A linkage assembly is used to drive 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 process of the inner clamping jaw (2) clamping the inner wall of the pipe pile (31).

7. The pile turning device for installing the offshore monopile foundation according to claim 6, characterized in that: The linkage assembly includes: A moving plate (27) is slidably connected inside the installation groove (25). The moving plate (27) includes a first section (2701) and an elastic telescopic section (2702). The first section (2701) is located inside the inclined groove (22) and has a first pushing inclined surface at its end. A pushing pin (28) is fixedly connected to the end of the elastic telescopic section (2702). A 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 pushing pin (28).

8. The pile turning device for installing the offshore monopile foundation according to claim 7, characterized in that: The elastic telescopic section (2702) includes: Two telescopic grooves (270201) are formed on both sides of the first section (2701), and a limiting block (270202) is fixedly connected inside. Two pushing frames (270203) have their ends fixedly connected to the pushing pin (28). The two pushing frames (270203) are respectively slidably arranged inside the two telescopic grooves (270201). Support springs (270204) are fixedly connected between the two pushing frames (270203) and the two telescopic grooves (270201) respectively. Limiting grooves (270205) are formed on the surfaces of the two pushing frames (270203), and the two limiting grooves (270205) are respectively slidably sleeved on the surfaces of the two limiting blocks (270202).

9. The pile-turning device for installing an offshore monopile foundation according to claim 7 or 8, characterized in that: Rubber wedge-shaped blocks (30) are fixedly connected to the clamping surfaces of the movable claw (26) and the inner clamping jaw (2).

10. The pile turning method of the pile turning device for installing the offshore monopile foundation according to claim 1, characterized in that: It includes the following steps: Step 1, attachment connection: Attach and connect to the middle position on the surface of the pipe pile (31) through an external connection component, and the second traction component tractions the external connection component. Insert the plug-in body (1) into the inner cavity at the end of the pipe pile (31), and the pushing component pushes multiple inner clamping jaws (2) to perform multi-point clamping on the inner cavity at the end of the pipe pile (31), and the first traction component tractions the plug-in body (1). Step 2, flipping and adjustment: The first traction component tractions the external connection component to support the middle position on the surface of the pipe pile (31). The second traction component pulls the plug-in body (1) to drive the pipe pile (31) to flip. Then, by paying out the second traction rope (15) through the second traction component, gradually support and adjust the flipping state of the pipe pile (31) until the pipe pile (31) is in a vertical state, and keep the plug-in body (1) and the pipe pile (31) in the same axis (a) state. Step 3, removal: After the pipe pile (31) has been flipped, the external connection component can be cut off from the surface of the pipe pile (31). Cancel the pushing of the multiple inner clamping jaws (2) through the pushing component to cancel the clamping, and pull out the inner clamping component through the first traction component to complete the removal.

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