Wind turbine installation vessel leg lifting device and method

Abstract

The application provides a pile leg lifting device and method for a wind power installation ship, and belongs to the technical field of ships.The application comprises a pile leg and an installation box, the top and bottom of the installation box are provided with corresponding through holes, the pile leg is arranged in the through hole of the installation box and penetrates through the installation box;the installation box is provided with vertically distributed first, second and third installation platforms, the first installation platform is provided with a fixing device for keeping the pile leg stationary, the second and third installation platforms are provided with down-pressing devices for controlling the downward movement of the pile leg, the bottom of the installation box is provided with an adjusting device for controlling the lifting of the pile leg, the adjusting device comprises a retractable member capable of being connected with or separated from the pile leg and a first winch connected with the retractable member;the axial direction of the side wall of the pile leg is provided with two first racks which are symmetrical about the axis.The application can improve the lifting speed of the pile leg, reduce the risk of gear jamming and improve the working efficiency of the wind power installation ship.

Description

Technical Field

[0001] This invention belongs to the field of marine technology, specifically relating to a lifting device and method for the legs of a wind turbine installation vessel. Background Technology

[0002] Compared to land-based construction, offshore wind power construction is significantly more challenging. Wind turbine installation vessels, as the core of offshore wind power construction, play a crucial role. In recent years, my country's offshore wind power construction has entered a period of rapid development, with a large number of wind turbine installation vessels being built quickly. These include bottom-mounted wind turbine installation vessels, jack-up wind turbine installation vessels, and self-propelled jack-up wind turbine installation vessels. Jack-up and self-propelled jack-up wind turbine installation vessels are secured to the seabed by lowering their legs to the ground. The raising and lowering of these legs relies on a lifting device, making the lifting device essential for securing the wind turbine installation vessel.

[0003] Traditional leg lifting and locking devices operate by controlling gears to mesh with the leg racks. However, since offshore platforms typically lift infrequently, marine life and debris can accumulate between the gears and racks during normal operation, causing jamming and severely impacting lifting efficiency. Furthermore, malfunctions in the lifting device are difficult to repair, and the working environment is hazardous. To address these issues, this invention proposes a rapid lifting device for wind turbine installation vessels. Summary of the Invention

[0004] To address the issues of jamming and slow speed during the lifting phase of wind turbine installation vessel legs, this invention provides a lifting device and method for wind turbine installation vessel legs, which can effectively improve the lifting speed of the legs and reduce the failure rate.

[0005] The technical solution of the present invention is as follows:

[0006] A lifting device for the legs of a wind turbine installation vessel includes legs and an installation box. The installation box has corresponding through holes at its top and bottom. The legs are placed within and through these holes. Two first racks, symmetrical about their axes, are axially arranged on the sidewalls of the legs. The installation box contains vertically distributed first, second, and third installation platforms. Two fixing devices are provided on the first installation platforms to keep the legs stationary, located on either side of the legs where the first racks are located. Each fixing device includes a first motor, a third rack, and a fixing clutch mechanism. The power output of the first motor is connected to the third rack via the fixing clutch mechanism. Under the power output of the first motor, the fixing clutch mechanism drives the third rack to move towards / away from the first rack, causing the third rack to move to its first and second extreme positions. The device moves back and forth between the positions; when the third rack is in the first extreme position, the third rack is separated from the first rack; when the third rack is in the second extreme position, the third rack engages with the first rack; the second and third mounting platforms are equipped with pressing devices for controlling the downward movement of the pile leg, and there are two pressing devices, located on both sides of the pile leg where the first rack is located; the pressing device includes a second motor, a third motor, and a pressing mechanism; the pressing mechanism includes a pressing transmission mechanism and a fourth rack; the power output end of the third motor is connected to the second motor, and the power output end of the second motor is connected to the fourth rack through the pressing transmission mechanism; under the power actuation of the third motor, the power output end of the second motor connects / disconnects with the pressing transmission mechanism; under the power actuation of the second motor, the pressing transmission mechanism first drives the fourth rack to engage with the first rack, and then presses the pile leg down to the target position.

[0007] The bottom of the mounting box is equipped with an adjustment device for controlling the raising and lowering of the pile legs. The adjustment device includes a retractable component that can be connected or disengaged from the pile legs and a first winch connected to the retractable component. The retractable component includes a retraction control mechanism and a second rack. Under the action of the retraction control mechanism, the second rack can engage / disengage with the first rack. When the second rack engages with the first rack, the raising and lowering of the pile legs is controlled by the power of the first winch.

[0008] Furthermore, the retraction control mechanism includes two arc-shaped plate-shaped first electromagnets and second electromagnets. The first electromagnet and the second electromagnet form a ring that surrounds the pile leg. A second rack is provided in the middle of the opposite side of the first electromagnet and the second electromagnet. The second rack corresponds to the first rack on the pile leg. A first generator and a second generator are respectively provided on the side of the first electromagnet and the second electromagnet that is opposite to the second rack. The first generator and the second generator are respectively connected to the winch.

[0009] Furthermore, a first mounting base and a second mounting base are respectively provided at the edges of the first electromagnet and the second electromagnet, and a first spring is provided between the first mounting base and the second mounting base. One end of the first spring is fixedly connected to the first mounting base, and the other end is fixedly connected to the second mounting base.

[0010] Furthermore, the fixed clutch mechanism includes a first threaded rod that meshes with the output shaft of the first motor and a second threaded rod that is threadedly connected to the first threaded rod. The end of the second threaded rod away from the end connected to the first threaded rod is provided with a third rack that can mesh with the first rack.

[0011] Furthermore, the second motor is arranged on the second mounting platform with its output shaft facing downwards. A roller is provided on the end face of the second motor with its output shaft, and the second motor is slidably connected to the second mounting platform via the roller. The third motor is mounted on the second mounting platform with its output shaft facing the second motor. A third threaded rod is provided on the side of the second motor opposite to the third motor. The output shaft of the third motor is threadedly connected to the third threaded rod, and the third motor drives the second motor to slide on the second mounting platform by rotation. The pressing mechanism is located on a third mounting platform below the second mounting platform. The second mounting platform has an elongated through-hole, and the output shaft of the second motor is movably connected to the pressing mechanism through the elongated through-hole.

[0012] Furthermore, the pressing mechanism includes a pressure plate, a screw disposed above the pressure plate, and a rotation controller fixedly connected to the pressure plate. The pressure plate is mounted on the third mounting platform via a second spring. One end of the screw is fixedly connected to the pressure plate, and the other end is fixedly connected to the lower surface of the second mounting platform via a third spring. A fourth threaded rod is provided on the output shaft of the second motor. The screw can be threadedly connected to or separated from the fourth threaded rod by the sliding of the second motor in the horizontal direction. The rotation controller includes a control part and a rotation part. The control part is fixedly connected to the pressure plate via a connecting rod, and the rotation part is provided with a fourth rack that can mesh with the first rack.

[0013] Furthermore, a second spring is provided on the side of the second motor opposite to the side wall of the mounting box, and the second spring is fixedly connected to the side wall of the mounting box.

[0014] Furthermore, the installation box is also equipped with a fourth installation platform, and the fourth installation platform is equipped with a stabilizing device. The stabilizing device includes a fourth motor, and the output shaft of the fourth motor is connected to a fifth threaded rod through a meshing manner. The fifth threaded rod is threadedly connected to a sixth threaded rod, and the end of the sixth threaded rod is provided with an arc-shaped plate that cooperates with the pile leg.

[0015] Furthermore, a fifth installation platform is also provided inside the installation box, and a second winch is provided on the fifth installation platform. The second winch is slidably connected to a pulley located at the top of the pile leg.

[0016] A method for raising and lowering the legs of a wind turbine installation vessel, based on the aforementioned wind turbine installation vessel leg raising and lowering device, includes a leg raising process and a leg lowering process. The leg lowering process includes the following steps:

[0017] Step 1: Release the fixing between the pile leg and the mounting box:

[0018] Start the first motor to drive the fixed clutch mechanism, causing the third rack to separate from the first rack until the third rack is at the first limit position;

[0019] Step 2: Control the descent of the pile legs:

[0020] Step 2.1: Power the first electromagnet and the second electromagnet respectively to generate magnetic force; and the first electromagnet and the second electromagnet attract each other through the generated magnetic force, so that the first electromagnet and the second electromagnet form a closed loop, so that the second rack meshes with the first rack on the pile leg.

[0021] Step 2.2: Start the first winch. The first winch releases the steel cable to control the descent of the pile legs until the pile legs reach the target position.

[0022] Step 3: Press down the pile legs:

[0023] Step 3.1: Start the third motor to drive the second motor to slide on the second mounting platform until the power output shaft of the second motor is successfully assembled with the power input end of the pressing mechanism;

[0024] Step 3.2: Start the rotation controller on the pressing mechanism to drive the fourth rack to rotate until the fourth rack meshes with the first rack;

[0025] Step 3.3: Start the second motor to drive the pressing mechanism downward to press down the pile leg until the pressing mechanism reaches its limit position;

[0026] Step 3.4: Reverse start the rotation controller on the pressing mechanism to drive the fourth rack to rotate in the opposite direction, causing the fourth rack to separate from the first rack until the fourth rack returns to its initial position;

[0027] Step 3.5: Start the third motor and push the second motor to separate the fourth threaded rod on the second motor from the screw. At this time, the pressure plate returns to the initial position under the elastic force of the second spring and the third spring.

[0028] Repeat steps 3.1-3.5 until the pile legs reach the specified depth;

[0029] Step 4: Secure the pile legs to the mounting box:

[0030] The first motor is started in reverse, which drives the fixed clutch mechanism, causing the third rack to mesh with the first rack until the third rack is in the second limit position, thus fixing the pile leg to the mounting box.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. In this invention, the pile legs are installed by passing through a mounting box. The pile legs' own weight, along with a retraction component inside the mounting box and an adjustment device for the second winch, achieve the overall raising or lowering of the pile legs. Furthermore, during the descent of the pile legs, the release speed of the second winch is changed, combined with the weight of the pile legs themselves, to rapidly increase the descent speed. During the ascent of the pile legs, the retraction and winding of the steel cable by the second winch is changed to raise the pile legs. The speed of the pile leg raising process is still controlled by adjusting the retraction speed of the winch. This method allows for rapid adjustment of the pile leg's raising and lowering.

[0033] 2. In this invention, the first, third, and fourth mounting platforms installed inside the mounting box are equipped with short rack segments for fixing the pile legs in both left and right directions. The direct contact between the rack and the pile leg rack replaces the contact between the gear and the pile leg rack in the traditional lifting device. This method can avoid the gear and the pile leg rack from jamming during the rack rotation, thus avoiding affecting work efficiency.

[0034] 3. In this invention, an arc-shaped electromagnet is installed on the part of the third installation platform directly connected to the pile leg, with one electromagnet on each of the front and rear sides of the pile leg, to limit the forward and backward movement of the pile leg during the lifting and lowering phase; an arc-shaped electromagnet is installed on the part of the first installation platform directly connected to the pile leg, with the arc-shaped electromagnets located at the left and right ends of the pile leg, to limit the left and right movement of the pile leg during the lifting and lowering phase. This method allows for precise control and adjustment of the pile leg lifting and lowering process.

[0035] 4. In this invention, all mounting platforms are located inside the mounting box, with limited area connecting to the outside. This reduces contact between the rack and the pile leg rack and the outside environment, preventing external impurities from affecting the lifting device's efficiency. Simultaneously, the pressing device on the second mounting platform is connected to the pressure plate by springs; furthermore, the outer side of the second motor on the second mounting platform is connected to the mounting box shell by a spring mechanism. This method provides protection during the pile leg lifting process. Attached Figure Description

[0036] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the adjustment device according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the first electromagnet and the second electromagnet attracting each other in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram showing the separation of the first electromagnet and the second electromagnet in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the pressing device according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure when the pressing device is connected to the pile leg in an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram showing the connection between the screw of the pressing device and the fourth screw on the second motor in an embodiment of the present invention;

[0043] Figure 8 This is a schematic diagram of the screw of the pressing device in an embodiment of the present invention separating from the fourth screw on the second motor;

[0044] Figure 9 This is a schematic diagram of the second motor mounted on the second mounting plate according to an embodiment of the present invention;

[0045] Figure 10 This is a schematic diagram of the connection between the fixing device and the pile leg in an embodiment of the present invention;

[0046] Figure 11 This is a schematic diagram of the fixing device separating from the pile leg in an embodiment of the present invention;

[0047] Figure 12 This is a schematic diagram of the stabilizing device according to an embodiment of the present invention;

[0048] In the diagram: 1. Pile leg, 10. First rack, 11. Pulley.

[0049] 2. Mounting box; 20. Through hole; 21. First mounting platform; 22. Second mounting platform; 220. Elongated through hole; 23. Third mounting platform; 24. Fourth mounting platform; 25. Fifth mounting platform.

[0050] 3. Fixing device; 30. First electric motor; 31. First threaded rod; 32. Second threaded rod; 33. Third rack.

[0051] 4. Pressing device; 40. Second motor; 400. Roller; 401. Third threaded rod; 402. Fourth threaded rod; 403. Fourth spring; 41. Third motor; 42. Pressing mechanism; 420. Pressure plate; 421. Screw; 422. Rotation controller; 4220. Control unit; 4221. Rotating unit; 423. Second spring; 424. Third spring; 425. Connecting rod; 426. Fourth rack.

[0052] 5. Adjusting device; 50. Retraction component; 500. First electromagnet; 5000. First mounting base; 5010. Second mounting base; 501. Second electromagnet; 502. Second rack; 503. First generator; 504. Second generator; 51. First winch.

[0053] 6. The first spring,

[0054] 7. Stabilizing device; 70. Fourth motor; 71. Fifth threaded rod; 72. Sixth threaded rod; 73. Arc-shaped plate.

[0055] 8. Second winch. Detailed Implementation

[0056] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. Example 1

[0057] Reference Figure 1As shown, this invention provides a rapid lifting device for a wind turbine installation vessel, including a leg 1 and an installation box 2. The installation box 2 is installed inside the hull and is an integral structure with the hull. Corresponding through holes 20 are provided at the top and bottom of the installation box 2. The leg 1 is placed in the through holes 20 of the installation box 2 and passes through the installation box 2. The installation box 2 is provided with a vertically distributed first installation platform 21, a second installation platform 22, and a third installation platform 23. A fixing device 3 is provided on the first installation platform 21 to keep the leg 1 stationary. The fixing device 3 is used to fix the leg 1 and keep it stationary with the wind turbine installation vessel when it uses the leg 1 for operation or navigation. Operating mechanisms are provided on the second installation platform 22 and the third installation platform 23. A pressing device 4 controls the downward movement of the pile leg 1, applying pressure to insert it into the seabed mud. The bottom of the mounting box 2 is equipped with an adjusting device 5 to control the raising and lowering of the pile leg 1. The adjusting device 5 includes a retractable member 50 that can be connected to or disconnected from the pile leg 1, and a first winch 51 connected to the retractable member 50. The adjusting device 5 controls the lowering and raising of the pile leg 1 by connecting the retractable member 50 to the pile leg 1 and then retracting the steel cable of the first winch 51. To facilitate the connection and control of the pile leg 1 by the fixing device 3, adjusting device 5, and pressing device 4, two first racks 10 symmetrical about their axes are provided axially on the side wall of the pile leg 1. (Refer to...) Figure 2-3As shown, the retraction component 50 includes two arc-shaped plates, a first electromagnet 500 and a second electromagnet 501. The first electromagnet 500 and the second electromagnet 501 form a ring that surrounds the pile leg 1. A second rack 502 is provided in the middle of the opposite side of the first electromagnet 500 and the second electromagnet 501. The second rack 502 corresponds to the first rack 10 on the pile leg 1. A first generator 503 and a second generator 504 are respectively provided on the side of the first electromagnet 500 and the second electromagnet 501 that is opposite to the second rack 502. The first generator 503 and the second generator 504 are fixedly connected to the first electromagnet 500 and the second electromagnet 501, respectively. The first generator 503 and the second generator 504 are respectively connected to the steel cable of the first winch 51. The retraction component 50 surrounds the pile leg 1 by the pulling and suspension action of the first winch 51. The first generator 503 and the second generator 504 can respectively energize the first electromagnet 500 and the second electromagnet 501, causing the first electromagnet 500 and the second electromagnet 501 to generate magnetic force. When the first electromagnet 500 and the second electromagnet 501 generate magnetic force and attract each other, the first electromagnet 500 and the second electromagnet 501 form a closed loop, and the second racks 502 on the first electromagnet 500 and the second electromagnet 501 will respectively mesh and connect with the first racks 10 on both sides of the pile leg 1, thereby connecting the retractable member 50 and the pile leg 1 to form an integral structure; finally, by retracting the steel cable of the first winch 51 to pull the first generator 501 and the second generator 502, the pile leg 1 can be controlled to rise and fall.

[0058] A first mounting base 5000 and a second mounting base 5010 are respectively provided at the edges of the first electromagnet 500 and the second electromagnet 501. A first spring 6 is provided between the first mounting base 5000 and the second mounting base 5010. One end of the first spring 6 is fixedly connected to the first mounting base 5000 and the other end is fixedly connected to the second mounting base 5010. The first electromagnet 500 and the second electromagnet 501 are connected together by the first spring 6 and can always surround the pile leg 1 so that the retractable component 50 can quickly connect with the pile leg 1. At the same time, when the first electromagnet 500 and the second electromagnet 501 lose their magnetic force, the first spring 6 can also separate the two using the elastic force of the first spring 6, thereby separating the second rack 502 from the pile leg 1.

[0059] Reference Figure 10-11As shown, there are two fixing devices 3, located on both sides of the pile leg 1 where the first rack 10 is located. The fixing device 3 includes a first motor 30, a first threaded rod 31 meshing with the output shaft of the first motor 30, and a second threaded rod 32 threaded with the first threaded rod 31. The first motor 30 is fixed on the first mounting platform 21, and the first threaded rod 31 and the second threaded rod 32 can be mounted on the first mounting platform 21 by a support rod with a bearing. The end of the second threaded rod 32 that is far from the end connected to the first threaded rod 31 is provided with a third rack 33 that can mesh with the first rack 10. The third rack 33 and the first rack 10 are in the same plane. The first motor 30 can control the second threaded rod 32 to move horizontally toward the pile leg 10 by rotation until the third rack 33 meshes with the first rack 10 on the pile leg 1. When the wind turbine installation vessel is navigating or operating using the pile legs, the rotation of the first motor 30 can control the third rack 33 to engage with the first rack 10 from both sides of the pile leg 1, thereby keeping the pile leg 1 stationary.

[0060] Reference Figure 5-9 As shown, there are two pressing devices 4, located on both sides of the pile leg 1 where the first rack 10 is located. The pressing device 4 includes a second motor 40, a third motor 41, and a pressing mechanism 42. The second motor 40 is arranged on the second mounting platform 22 with its output shaft facing downward. A roller 400 is provided on the end face of the output shaft of the second motor 40, and the second motor 40 is slidably connected to the second mounting platform 22 through the roller 400. The third motor 41 is mounted on the second mounting platform 22 with its output shaft facing the second motor 40. A third threaded rod 401 is provided on the side opposite to the second motor 40 and the third threaded rod 401. The output shaft of the third motor 41 is threadedly connected to the third threaded rod 401. The third motor 41 can drive the second motor 40 to slide on the second mounting platform 22 by rotating. The pressing mechanism 42 is located on the third mounting platform 23 below the second mounting platform 22. The second mounting platform 22 has an elongated through hole 220, and the output shaft of the second motor 22 is assembled and connected to the pressing mechanism 42 through the elongated through hole 220. The pressing mechanism 42 can also be assembled and connected to the pile leg 1. The second motor 40 is used to control the up and down movement of the pressing mechanism 42, and the third motor 41 is used to control the connection or separation of the second motor 40 and the pressing mechanism 42. The width of the elongated through hole 220 matches the diameter of the output shaft of the second motor 40. The elongated through hole 220 is not only the connection channel between the second motor 40 and the pressing mechanism 42, but also the movement track of the second motor 40 on the second mounting platform 22.

[0061] The pressing mechanism 42 includes a pressure plate 420, a screw 421 disposed above the pressure plate 420, and a rotation controller 422 fixedly connected to the pressure plate 420. The pressure plate 420 is mounted on a third mounting platform 23 via a second spring 423. One end of the screw 421 is fixedly connected to the pressure plate 420, and the other end is fixedly connected to the lower surface of the second mounting platform 22 via a third spring 424. A fourth threaded rod 402 is provided on the output shaft of the second motor 40. The screw 421 can be threadedly connected to or separated from the fourth threaded rod 402 by the horizontal sliding of the second motor 40. When the four-threaded rod 402 is threaded, the second motor 40 can control the screw 421 to move downward by rotating, and simultaneously press the pressure plate 420 downward; the rotation controller 422 includes a control unit 4220 and a rotation unit 4221. The control unit 4220 is fixedly connected to the pressure plate 420 through a connecting rod 425 and can move up and down with the pressure plate 420. The rotation unit 4221 is rotatably connected to the control unit 4220, and the control unit 4220 can control the rotation unit 4221 to rotate cyclically in the horizontal direction; the rotation unit 4221 is provided with a fourth rack 426 that can mesh with the first rack 10. In its initial state, located below the third mounting platform 23, when it is necessary to press down on the pile leg 1, the control unit 4220 controls the fourth rack 426 of the rotating unit 4221 to rotate 90° horizontally toward the pile leg 1, and then engages with the first rack 10. Next, it controls the second motor 40 to rotate, causing the screw 421 threadedly connected to the fourth threaded rod 402 to move downwards, thus moving the pressure plate 420 downwards. The fourth rack 426 also moves downwards synchronously during the downward movement of the pressure plate 420, achieving the pressing action on the pile leg 1. When the pressure plate 420 moves downwards to its limit distance, the control unit 4220... The rotating part 4221 is controlled to rotate in the opposite direction to return the fourth rack 426 to its initial position. Then, the third motor 41 is started to push the second motor 40, causing the fourth threaded rod 402 on the second motor 40 to separate from the screw 421. At this time, the pressure plate 420 returns to its initial position under the elastic force of the second spring 423 and the third spring 424. Then, the third motor 41 is controlled to rotate in the opposite direction to return the second motor 40 to its initial position, and the fourth threaded rod 402 and the screw 421 are reconnected by threads. Finally, the second motor 40 is started again to continue the next round of pressing operation until the pile leg 1 reaches the specified depth.

[0062] In order to keep the second motor 40 stable when sliding on the second mounting platform 21, a fourth spring 403 is provided on the side of the second motor 40 opposite to the side wall of the mounting box 2. The fourth spring 403 is fixedly connected to the side wall of the mounting box 2. There are six fourth springs 403, which are distributed in an array.

[0063] Reference Figure 12As shown, a fourth mounting platform 24 is also provided inside the mounting box 2. A stabilizing device 7 is provided on the fourth mounting platform 24. The stabilizing device 7 includes a fourth motor 70, which is fixed to the fourth mounting platform 24. The output shaft of the fourth motor is connected to a fifth threaded rod 71 via a meshing mechanism. The fifth threaded rod 71 is threadedly connected to a sixth threaded rod 72. The end of the sixth threaded rod 72 is provided with an arc-shaped plate 73 that mates with the pile leg 1. The sixth threaded rod 72 can move along its axial direction through the transmission action of the fifth threaded rod 71. When the pile leg 1 moves up and down, the fourth motor 70 can be controlled to rotate, causing the sixth threaded rod 72 to slowly move towards the pile leg 1 until the arc-shaped plate 73 is completely in contact with the side wall of the pile leg 1, thus achieving the purpose of maintaining stability during the lifting and lowering of the pile leg 1.

[0064] Reference Figure 1 As shown, the installation box 2 also includes a fifth installation platform 25, on which a second winch 8 is mounted. The second winch 8 is slidably connected to a pulley 1 located at the top of the pile leg 1. Specifically, the steel cable of the second winch 8 is passed through the pulley 11, and then the end of the steel cable is fixed to the fifth installation platform 25. When the pile leg 1 of the wind turbine installation vessel is fixed to the seabed, and it is necessary to lift the wind turbine installation vessel upwards and remove it from the sea surface, firstly, the third rack 33 of the fixing device 3 is separated from the first rack 10 on the pile leg 1. Then, the steel cable of the second winch 8 is contracted, and the wind turbine installation vessel will slowly rise under the pulling force of the second winch 8 until it reaches the designated height. Finally, the fixing device 3 is controlled to engage the third rack 33 with the first rack 1. Example 2

[0065] This embodiment provides a method for raising and lowering the legs of a wind turbine installation vessel, based on the wind turbine installation vessel leg raising and lowering device described in Embodiment 1. The method includes a leg raising process and a leg lowering process, wherein:

[0066] The process of lowering the pile legs includes the following steps:

[0067] Step 1: Release the fixing between the pile leg and the mounting box:

[0068] Start the first motor 30, drive the fixed clutch mechanism, and cause the third rack 33 to separate from the first rack 10 until the third rack 33 is in the first limit position;

[0069] Step 2: Control the descent of the pile legs:

[0070] Step 2.1: Power is supplied to the first electromagnet 500 and the second electromagnet 501 respectively, so that the first electromagnet 500 and the second electromagnet 501 generate magnetic force; and the first electromagnet 500 and the second electromagnet 501 attract each other through the generated magnetic force, so that the first electromagnet 500 and the second electromagnet 501 form a closed ring, so that the second rack 502 meshes with the first rack 10 on the pile leg 1.

[0071] Step 2.2: Start the first winch 51. The first winch 51 releases the steel cable to control the descent of the pile leg 1 until the pile leg 1 descends to the target position.

[0072] Step 3: Press down the pile legs:

[0073] Step 3.1: Start the third motor 41 to drive the second motor 40 to slide on the second mounting platform 22 until the power output shaft of the second motor 40 is successfully assembled with the power input end of the pressing mechanism 42.

[0074] Step 3.2: Start the rotation controller 422 on the pressing mechanism 42 to drive the fourth rack 426 to rotate until the fourth rack 426 meshes with the first rack 10;

[0075] Step 3.3: Start the second motor 40, which drives the pressing mechanism 42 to press down the pile leg until the pressing mechanism reaches its limit position.

[0076] Step 3.4: Reverse start the rotation controller 422 on the pressing mechanism 42 to drive the fourth rack 426 to rotate in the opposite direction, causing the fourth rack 426 to separate from the first rack 10 until the fourth rack 426 returns to the initial position;

[0077] Step 3.5: Start the third motor 41 and push the second motor 40 to separate the fourth threaded rod 402 on the second motor 40 from the screw 421. At this time, the pressure plate 420 returns to the initial position under the elastic force of the second spring 423 and the third spring 424.

[0078] Repeat steps 3.1-3.5 until pile leg 1 reaches the specified depth;

[0079] Step 4: Secure the pile legs to the mounting box:

[0080] The first motor 30 is started in reverse, which drives the fixed clutch mechanism, causing the third rack 33 to mesh with the first rack 10 until the third rack 33 is in the second limit position, thus fixing the pile leg to the mounting box.

[0081] During the lifting process of the pile legs, it is also necessary to first release the fixing between the pile legs and the mounting box, then lift the pile legs to the target position through the adjustment device, and finally fix the pile legs to the mounting box.

[0082] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A wind farm installation vessel leg jacking arrangement, characterised in that: The utility model relates to a pile leg installation box, including pile leg (1) with installation box (2), the top and bottom of installation box (2) are provided with corresponding through -hole (20), the pile leg (1) is placed in the through -hole (20) of installation box (2) and passes through installation box (2), simultaneously, the axial direction of the side wall of pile leg (1) is provided with two first rack (10) about the axial symmetry; The installation box (2) is provided with a first installation platform (21), a second installation platform (22) and a third installation platform (23) vertically distributed in the installation box (2); The first installation platform (21) is provided with a fixing device (3) for keeping the pile leg stationary, the fixing device (3) has two fixing devices (3) respectively located on both sides of the pile leg (1) provided with the first rack (10), each fixing device (3) comprises a first motor (30), a third rack (33) and a fixed clutch mechanism, the power output end of the first motor (30) is connected with the third rack (33) through the fixed clutch mechanism, the fixed clutch mechanism drives the third rack (33) to move towards or away from the first rack (10) under the power output of the first motor (30), so as to make the third rack (33) reciprocate between the first limit position and the second limit position, when the third rack (33) is in the first limit position, the third rack (33) is in a separated state from the first rack (10), when the third rack (33) is in the second limit position, the third rack (33) is engaged with the first rack (10); The second installation platform (22) and the third installation platform (23) are provided with a pressing device (4) for controlling the pile leg (1) to move downwards, the pressing device (4) has two pressing devices (4) respectively located on both sides of the pile leg (1) provided with the first rack (10), the pressing device (4) comprises a second motor (40), a third motor (41) and a pressing mechanism (42), the pressing mechanism (42) comprises a pressing transmission mechanism and a fourth rack (426), the power output end of the third motor (41) is connected with the second motor (40), the power output end of the second motor (40) is connected with the fourth rack (426) through the pressing transmission mechanism, the power output end of the second motor (40) is connected with or separated from the pressing transmission mechanism under the power action of the third motor (41), under the power action of the second motor (40), the pressing transmission mechanism first drives the fourth rack (426) to engage with the first rack (10), and then the pile leg (1) is pressed until the target position; The bottom of the installation box (2) is provided with an adjusting device (5) for controlling the pile leg (1) to move up and down, the adjusting device (5) comprises a contraction member (50) capable of being connected with or separated from the pile leg (1) and a first winch (51) connected with the contraction member (50), the contraction member (50) comprises a contraction control mechanism and a second rack (502), the second rack (502) can engage with or separate from the first rack (10) under the action of the contraction control mechanism, when the second rack (502) engages with the first rack (10), the pile leg (1) is controlled to move up and down under the power action of the first winch (51).

2. A windmill installation vessel leg lifting device according to claim 1, characterized in that: The contraction control mechanism comprises two arc-shaped plate-shaped first electromagnets (500) and second electromagnets (501), the first electromagnets (500) and the second electromagnets (501) surround the pile leg (1) in a ring shape, the middle parts of the opposite sides of the first electromagnets (500) and the second electromagnets (501) are provided with second racks (502), the second racks (502) correspond to the first racks (10) on the pile leg (1), the sides of the first electromagnets (500) and the second electromagnets (501) away from the second racks (502) are respectively provided with first generators (503) and second generators (504), the first generators (503) and the second generators (504) are connected with first hoists (51) respectively.

3. A windmill installation vessel leg lifting device according to claim 2, characterized in that: The edges of the first electromagnets (500) and the second electromagnets (501) are respectively provided with first mounting seats (5000) and second mounting seats (5010), the first mounting seat (5000) and the second mounting seat (5010) are provided with a first spring (6) therebetween, one end of the first spring (6) is fixedly connected with the first mounting seat (5000), and the other end is fixedly connected with the second mounting seat (5010).

4. A wind farm installation vessel leg jacking arrangement according to claim 3, characterised in that: The fixed clutch mechanism comprises a first threaded rod (31) engagedly connected with an output shaft of the first motor (30) and a second threaded rod (32) threadedly connected with the first threaded rod (31), and the second threaded rod (32) is provided with a third rack (33) capable of engaging with the first rack (10) at an end away from the first threaded rod (31).

5. A windmill installation vessel leg lifting device according to claim 4, characterized in that: The second motor (40) is arranged on the second mounting platform (22) in a manner that the output shaft faces downward, the second motor (40) is provided with a roller (400) on the end face of the output shaft, and the second motor (40) is slidably connected with the second mounting platform (22) through the roller (400); the third motor (41) is installed on the second mounting platform (22) in a manner that the output shaft faces the second motor (40), the second motor (40) and the third motor (41) are provided with a third threaded rod (401) on the opposite sides, the output shaft of the third motor (41) is threadedly connected with the third threaded rod (401), and the third motor (41) drives the second motor (40) to slide on the second mounting platform (22) by rotating; the pressing mechanism (42) is arranged on a third mounting platform (23) below the second mounting platform (22), the second mounting platform (22) is provided with an elongated through hole (220), and the output shaft of the second motor (40) is assembledly connected with the pressing mechanism (42) through the elongated through hole (220).

6. A windmill installation vessel leg lifting device according to claim 5, characterized in that: The lower pressing transmission mechanism comprises a pressing plate (420), a screw rod (421) arranged above the pressing plate (420), and a rotary controller (422) fixedly connected with the pressing plate (420), the pressing plate (420) is installed on the third mounting platform (23) through a second spring (423) below the pressing plate (420), one end of the screw rod (421) is fixedly connected with the pressing plate (420), and the other end is fixedly connected with the lower surface of the second mounting platform (22) through a third spring (424); a fourth threaded rod (402) is arranged on the output shaft of the second motor (40), the screw rod (421) is threadedly connected with or separated from the fourth threaded rod (402) through sliding of the second motor (40) in the horizontal direction; the rotary controller (422) comprises a control part (4220) and a rotary part (4221), the control part (4220) is fixedly connected with the pressing plate (420) through a connecting rod (425), and the rotary part (4221) is provided with a fourth rack (426) capable of being engaged with the first rack (10).

7. A windmill installation vessel leg lifting device according to claim 6, characterized in that: A fourth spring (403) is further arranged on the side surface of the second motor (40) opposite to the side wall of the mounting box (2), and the fourth spring (403) is fixedly connected with the side wall of the mounting box (2).

8. A windmill installation vessel leg lifting device according to claim 7, characterized in that: A fourth mounting platform (24) is further arranged in the mounting box (2), a stabilizing device (7) is arranged on the fourth mounting platform (24), the stabilizing device (7) comprises a fourth motor (70), a fifth threaded rod (71) is connected with the output shaft of the fourth motor (70) in a meshing mode, a sixth threaded rod (72) is threadedly connected with the fifth threaded rod (71), and an arc-shaped plate (73) matched with the pile leg (1) is arranged at the end of the sixth threaded rod (72).

9. A windmill installation vessel leg lifting device according to claim 8, characterized in that: A fifth mounting platform (25) is further arranged in the mounting box (2), a second winch (8) is arranged on the fifth mounting platform (25), and the second winch (8) is slidably connected with a pulley (11) arranged at the top end of the pile leg (1).

10. A method of jacking a wind turbine installation vessel's leg, based on the wind turbine installation vessel's leg jacking device according to claim 9, characterized in that, The method comprises a pile leg lifting process and a pile leg lowering process, wherein: The pile leg lowering process comprises the following steps: Step one, releasing the fixation between the pile leg and the mounting box: The first motor (30) is started to drive the fixed clutch mechanism, so that the third rack (33) is separated from the first rack (10) until the third rack (33) is in the first limit position; Step two, controlling the pile leg to descend: Step 2.1, respectively energizing the first electromagnet (500) and the second electromagnet (501) to make the first electromagnet (500) and the second electromagnet (501) generate magnetic force; and the first electromagnet (500) and the second electromagnet (501) are attracted to each other through the generated magnetic force, so that the first electromagnet (500) and the second electromagnet (501) form a closed ring, so that the second rack (502) is engaged with the first rack (10) on the pile leg (1); Step 2.2, start the first winch (51), the first winch (51) controls the descent of the pile leg (1) by releasing the steel cable until the pile leg (1) is lowered to the target position; Step three, press down the pile leg: Step 3.1, start the third motor (41), drive the second motor (40) to slide on the second mounting platform (22) until the power output shaft of the second motor (40) is successfully assembled with the power input end of the pressing mechanism (42); Step 3.2, start the rotation controller (422) on the pressing mechanism (42) to drive the fourth rack (426) to rotate until the fourth rack (426) is engaged with the first rack (10); Step 3.3, start the second motor (40) to press down the pile leg by driving the pressing mechanism (42) to go down until the pressing mechanism goes down to the limit position; Step 3.4, reverse start the rotation controller (422) on the pressing mechanism (42) to drive the fourth rack (426) to rotate in reverse, so that the fourth rack (426) is separated from the first rack (10) until the fourth rack (426) returns to the initial position; Step 3.5, start the third motor (41) to push the second motor (40) so that the fourth threaded rod (402) on the second motor (40) is separated from the screw rod (421), at this time, the pressing plate (420) returns to the initial position under the elastic force of the second spring (423) and the third spring (424); Repeat steps 3.1-3.5 until the pile leg (1) reaches the specified depth; Step four, fix the pile leg and the mounting box: Reverse start the first motor (30) to drive the fixed clutch mechanism to make the third rack (33) engage with the first rack (10) until the third rack (33) is in the second limit position, realizing the fixation of the pile leg and the mounting box.

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