Floating offshore wind turbine installation structure and method of use

Abstract

The application provides a floating offshore wind power integrated fan tower installation structure and a use method thereof, and belongs to the technical field of offshore wind power installation.The structure comprises a wind turbine, an upper tower section fixed below the wind turbine, a lower tower section arranged below the upper tower section, a wedge-shaped block arranged on the lower edge of the outer side of the upper tower section, and two guide blocks symmetrically arranged on the upper edge of the outer side of the lower tower section and corresponding to the wedge-shaped block.The opposite sides of the top of the two guide blocks are both inclined downward, the wedge-shaped block is slidingly connected between the opposite sides of the two guide blocks, the bottom of the wedge-shaped block is arc-shaped, and the side close to the upper tower section is inclined upward.The bottom of the upper tower section is provided with an upper flange, and the upper flange is connected with the wedge-shaped block through a mounting mechanism.The wedge-shaped block bottom inclined surface and the wedge-shaped block and the pair of guide blocks are matched with each other, axial centering and circumferential offset correction are automatically completed during the lowering of the tower section, manual high-altitude alignment operation is not needed, the offshore hoisting operation time is greatly shortened, and the operation risk under the wind and wave environment is reduced.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power engineering technology, and in particular to a floating offshore wind turbine tower installation structure and its usage method. Background Technology

[0002] As offshore wind power development moves towards deeper waters, floating wind power technology, with its advantages of not being limited by seabed topography and being convenient for construction and maintenance, has become the core direction of industry development.

[0003] The tower of a floating wind turbine is usually manufactured in sections and installed by dock hoisting. Affected by the complex environment of sea waves and ocean currents, the floating platform will experience lateral, longitudinal, and heaving movements during the hoisting process. In addition, the upper section of the tower is also prone to swaying and displacement, making it extremely difficult to align the bolt holes of the upper and lower flanges.

[0004] For example, patent publication number WO2023082524A1 discloses a method for hoisting and docking the nacelle of an offshore wind turbine using a floating vessel. A crane is installed on the deck platform of the floating vessel. The crane uses a spreader to hoist the nacelle, which is pre-equipped with a docking positioning device, to a predetermined distance above the tower. Then, the docking positioning device is connected to the tower using a hand-operated hoist. The hand-operated hoist is manually operated to align the flange holes of the nacelle flange and the tower flange. At the same time, the crane is operated to lower the nacelle until the connecting bolts pre-installed in the nacelle flange holes are inserted into the corresponding tower flange holes. Finally, the docking positioning device and the hand-operated hoist are removed to complete the docking construction between the nacelle and the tower.

[0005] As can be seen from the existing technology, the conventional fixed wind turbine tower docking and installation currently relies heavily on the operating experience of the hoisting operator and the manual assistance of the high-altitude workers for alignment. This results in a long operation cycle, high risk of high-altitude operations, and difficulty in guaranteeing alignment accuracy.

[0006] For example, patent publication number JP2012201219A uses a mass damper to control the swing of the crane-suspended tower, while a controllable moment gyroscope is installed in the float to control the overall sway of the float, achieving dual stability for both the tower and the float. Through the synergistic effect of the mass damper and the controllable moment gyroscope, the tower and the float remain stable in strong winds and waves, reducing the dependence of construction on weather conditions, improving the feasibility and economy of offshore wind power installation, and avoiding equipment damage or accidents caused by structural swaying.

[0007] As can be seen from the above-mentioned existing technologies, some existing auxiliary installation structures are quite complex, which increases both the redundant weight of the floating body and the cost of tower installation.

[0008] Therefore, a floating offshore wind turbine tower installation structure and its usage method are proposed to solve the above problems. Summary of the Invention

[0009] To address the problems mentioned in the background art, the present invention provides a floating offshore wind turbine tower installation structure and its usage method, which realizes automatic centering and correction during the tower hoisting process, thereby reducing installation difficulty and operational risks.

[0010] To achieve the above objectives, the technical solution adopted by this invention is: a floating offshore wind turbine integrated tower installation structure, including a wind turbine, an upper tower section fixed below the wind turbine, and a lower tower section below the upper tower section, characterized in that: The outer side of the upper tower section is provided with wedge-shaped blocks, and the outer side of the lower tower section is provided with two symmetrically distributed guide blocks that correspond to the wedge-shaped blocks; The tops of the two guide blocks are both tilted downwards on opposite sides, and the wedge block is slidably connected between the opposite sides of the two guide blocks; The bottom of the wedge-shaped block is arc-shaped, and the side closest to the upper section of the tower is inclined upward; The bottom of the upper section of the tower is equipped with an upper flange, which is connected to a wedge block via an installation mechanism; The lower section of the tower is equipped with a lower flange at the top, which is connected to the guide block via a support mechanism.

[0011] Preferably, the mounting mechanism includes a mounting block, which is fixed to the top of the upper flange; The wedge-shaped block has a connecting hole along the radial direction of the upper tower section, and the mounting block is slidably connected to the inside of the connecting hole; The top of the wedge block is equipped with a positioning component for positioning the mounting block.

[0012] Preferably, the positioning component includes a positioning frame, which is mounted on top of the wedge block; The internal sliding connection of the positioning frame has a positioning block that extends into the connection hole; The top of the mounting block has a positioning groove that fits into the positioning block; The top of the positioning block is rotatably connected to a threaded rod extending to the top of the positioning frame, and the threaded rod is threadedly connected to the positioning frame. A knob is fixed to the top of the threaded rod.

[0013] Preferably, a guide block is provided on the inner side of the connecting hole; The outer side of the mounting block is provided with a guide groove corresponding to the guide block; The side of the guide groove away from the upper tower section is connected to the outside, and the guide block is slidably connected inside the guide groove.

[0014] Preferably, a limiting groove is provided on the outer side of the positioning block, and both ends of the limiting groove are connected to the outside. A limiting block is fixed inside the positioning frame, and the limiting block is slidably connected inside the limiting groove.

[0015] Preferably, the support mechanism includes two symmetrically distributed L-shaped plates, both of which are fixed to the outside of the lower flange; The two guide blocks are located inside the two L-shaped plates respectively.

[0016] Preferably, a T-shaped block is provided on the opposite side of each of the two guide blocks, and a T-shaped groove corresponding to the T-shaped block is provided on the inner side of each of the two L-shaped plates. The side of the T-shaped groove away from the lower tower section is connected to the outside, and the two T-shaped blocks are slidably connected inside the two T-shaped grooves respectively.

[0017] Preferably, a first magnetic attraction element is provided inside the T-shaped groove on the side near the lower section of the tower; A second magnetic attraction element is provided on the side of the T-shaped block near the lower section of the tower. The first magnetic component and the corresponding second magnetic component magnetically engage.

[0018] Preferably, there are multiple sets of wedge blocks and two guide blocks, which are distributed in a circular array on the outer side of the upper and lower tower sections, respectively.

[0019] Another technical solution adopted in this invention is: a floating offshore wind turbine tower installation structure and its usage method, comprising the following steps: S1. At the upper flange of the upper section of the tower, the wedge block is assembled and locked radially along the tower using an installation mechanism; S2. At the lower flange of the lower section of the tower, a pair of guide blocks are assembled and positioned by a support mechanism so that the relatively inclined surfaces at the top of the two guide blocks are set opposite each other. S3. Lift the upper section of the tower with the wind turbine assembled, move it to the top of the lower section of the tower, and adjust the circumferential angle so that each set of wedge blocks is respectively engaged in the upper opening between the two guide blocks of each set; S4. Slowly lower the upper tower section, and slide the bottom of the wedge block along the outside of the lower flange to complete the axial alignment; As it continues downward, the wedge block slides down along the top surface of the two guide blocks, and through the bottom of the wedge block and the top of the two guide blocks, it rotates adaptively during the sliding process, automatically correcting the circumferential offset of the upper tower section; Through the combined action of multiple sets of wedge blocks and guide blocks, the upper flange and the lower flange are coaxially aligned, and the bolt holes correspond one by one; S5. After the upper flange and lower flange are fully fitted, the crane can loosen the hook to relieve the force. The operators can then install the flange connecting bolts and tighten them diagonally according to the torque required by the specifications to complete the docking and fixing of the upper and lower tower sections. S6. After installation, first use the installation mechanism to release the locking of the wedge block, and then pull the wedge block outwards radially to remove it; The guide block is then removed from inside the L-shaped plate using a support mechanism.

[0020] This invention provides a floating offshore wind turbine tower installation structure and its usage method, with the following advantages: 1. This invention automatically completes axial alignment and circumferential offset correction during the tower lowering process by using the inclined bottom surface of the wedge block and the mutual cooperation between the wedge block and the paired guide blocks. It eliminates the need for manual high-altitude alignment operations, greatly reduces the difficulty of offshore hoisting operations, significantly shortens the offshore hoisting operation time, and reduces the operational risks in windy and wave environments.

[0021] 2. In this invention, both the wedge block and the guide block are connected to the flange through a detachable installation mechanism, a support mechanism, and a flange. After the tower is connected, it can be completely removed and recycled for reuse in the installation of other towers. This will not increase the permanent weight of the tower, nor will it affect the appearance and corrosion resistance of the tower.

[0022] 3. In this invention, the installation mechanism adopts a slider insertion and fitting positioning method, and the support mechanism adopts a T-shaped insertion and magnetic positioning method, both of which can quickly complete assembly and disassembly, are simple to operate, have high positioning accuracy, and strong connection stability. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial three-dimensional structural diagram of the upper tower section, lower tower section, wedge block, guide block, installation mechanism, and support mechanism in this invention; Figure 3 This is a top view of the upper tower section, lower tower section, wedge block, guide block, installation mechanism, and support mechanism in this invention; Figure 4 This is a three-dimensional structural diagram of the upper flange, lower flange, wedge block, guide block, mounting mechanism, and support mechanism in this invention; Figure 5 This is an exploded cross-sectional view of the wedge block and the mounting mechanism in this invention; Figure 6 This is a partial cross-sectional view of the wedge block and the mounting mechanism in this invention; Figure 7 This is a three-dimensional structural diagram of the lower flange, guide block, and support mechanism in this invention; Figure 8 This is an exploded view of the guide block and support mechanism in this invention; Figure 9 This is a three-dimensional structural diagram of the wedge block in this invention.

[0024] In the diagram: 1. Wind turbine; 2. Upper tower section; 21. Upper flange; 3. Lower tower section; 31. Lower flange; 4. Wedge block; 5. Guide block; 51. T-block; 511. Second magnetic chuck; 52. T-slot; 521. First magnetic chuck; 6. Mounting mechanism; 61. Mounting block; 62. Connecting hole; 621. Guide block; 622. Guide slot; 63. Positioning assembly; 631. Positioning frame; 632. Positioning block; 6321. Limiting slot; 6322. Limiting block; 633. Positioning slot; 634. Threaded rod; 635. Knob; 7. Support mechanism; 71. L-shaped plate Detailed Implementation To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0025] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of the invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, such as welding, riveting, or bonding; it can also be a detachable connection, such as threaded connection, keyed connection, or pin connection; or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention from the specific circumstances.

[0027] Example 1: like Figure 1-9 As shown, the floating offshore wind turbine integral tower installation structure includes a wind turbine 1, an upper tower section 2 fixedly connected to the bottom of the wind turbine 1, a lower tower section 3 coaxially arranged below the upper tower section 2, an upper flange 21 fixed to the bottom of the upper tower section 2, and a lower flange 31 fixed to the top of the lower tower section 3. The upper flange 21 and the lower flange 31 are fixedly connected by bolts.

[0028] In this embodiment, a wedge-shaped block 4 is provided at the lower edge of the upper tower section 2, and two symmetrically distributed guide blocks 5 are provided at the upper edge of the lower tower section 3, with the two guide blocks 5 corresponding to the wedge-shaped block 4.

[0029] The top sides of the two guide blocks 5 are both set as downward sloping surfaces, forming a guide opening that is wider at the top and narrower at the bottom, while the wedge block 4 is slidably set between the opposite sides of the two guide blocks 5.

[0030] The bottom of the wedge block 4 is set as an arc surface, and the side of the wedge block 4 closest to the upper tower section 2 is inclined upward to form an inclined bottom surface that is higher inside and lower outside.

[0031] During the lowering process, the inclined bottom surface of the wedge block 4 can increase the contact tolerance range with the lower flange 31. When there is a misalignment during the initial alignment, the inclined bottom surface can allow the wedge block 4 to slide downward along the outside of the lower flange 31, so that the upper tower section 2 and the lower tower section 3 can be axially aligned. At the same time, the axial alignment process is smoother, reducing the impact vibration during the lowering of the tower, and adapting to the swaying conditions of offshore hoisting.

[0032] With the centering completed, the upper tower section 2 continues downward. The bottom of the wedge block 4 is arc-shaped, which allows the wedge block 4 to slide adaptively along the inclined surface of the guide block 5 during the lowering process, thus offsetting the circumferential offset during hoisting. When the wedge block 4 moves downward and slides between the opposite sides of the two guide blocks 5, it can prevent the upper tower section 2 from shifting circumferentially, ensuring that the hoisting of the upper tower section 2 is more stable.

[0033] like Figure 3 As shown in this embodiment, multiple sets of wedge blocks 4 and two matching guide blocks 5 are provided, and are evenly distributed in a circular array along the outer wall of the upper tower section 2 and the lower tower section 3 to achieve multi-point synchronous guided installation.

[0034] It should be noted that the multi-point ring array arrangement can form multi-directional synchronous constraints around the upper tower section 2 and the lower tower section 3, correcting axial center misalignment and circumferential offset from all directions at the same time, significantly improving the coaxiality of the upper flange 21 and the lower flange 31, ensuring the alignment accuracy of bolt holes, avoiding tower tilting caused by uneven force on a single set of guides, and providing stronger centering stability.

[0035] like Figure 2-6 As shown, in this embodiment, the upper flange 21 is detachably connected to the wedge block 4 via the mounting mechanism 6.

[0036] like Figure 7 As shown, the mounting mechanism 6 includes a mounting block 61, which is bolted to the upper surface of the upper flange 21 and extends radially outward along the tower.

[0037] The wedge block 4 has a through connection hole 62 along the radial direction of the upper tower section 2. The mounting block 61 can slide into the outer end opening of the connection hole 62 to realize the insertion and assembly of the wedge block 4 and the upper flange 21.

[0038] like Figure 4 As shown, a guide block 621 is fixed on the inner wall of the connecting hole 62, and a guide groove 622 adapted to the guide block 621 is opened on the outer wall of the mounting block 61. The side of the guide groove 622 away from the upper tower section 2 is connected to the outside.

[0039] When assembling the wedge block 4, the guide block 621 slides along the guide groove 622. The cooperation between the guide block 621 and the guide groove 622 can accurately guide the insertion direction of the wedge block 4, preventing the wedge block 4 from rotating or from being installed in the wrong direction.

[0040] During the assembly of the upper tower section 2, the guide block 621 and guide groove 622 can prevent the wedge block 4 from being deflected by lateral forces during hoisting and lowering, ensuring the alignment accuracy of the wedge block 4 and ensuring stable and reliable centering effect.

[0041] like Figure 5 As shown, a positioning component 63 is provided on the top of the wedge block 4 for locking the position of the mounting block 61.

[0042] The positioning component 63 includes a positioning frame 631, which is fixed to the top of the wedge block 4 and communicates with the internal space of the connecting hole 62.

[0043] A positioning block 632 is slidably disposed inside the positioning frame 631, and the lower end of the positioning block 632 can extend into the connection hole 62.

[0044] The top of the mounting block 61 is provided with a positioning groove 633, and the lower end of the positioning block 632 can be embedded in the positioning groove 633 to lock the wedge block 4.

[0045] The top of the positioning block 632 is rotatably connected to a threaded rod 634, which extends upward out of the top surface of the positioning frame 631 and is threadedly engaged with the positioning frame 631.

[0046] A knob 635 is fixed to the top of the threaded rod 634. Rotating the knob 635 will drive the threaded rod 634 to rotate, thereby driving the positioning block 632 to slide up and down. When the positioning block 632 moves downward and is embedded in the positioning groove 633, the wedge block 4 can be locked by the positioning block 632 and the positioning groove 633, preventing the wedge block 4 from sliding or disengaging from the mounting block 61. When the positioning block 632 moves upward and disengages from the positioning groove 633, the wedge block 4 can be removed from the mounting block 61, thereby realizing the disassembly of the wedge block 4 and facilitating the reuse of the wedge block 4.

[0047] like Figure 6 As shown, the side wall of the positioning block 632 has a limiting groove 6321, which extends vertically and is connected to the outside at both the top and bottom.

[0048] A limiting block 6322 is fixed to the inner wall of the positioning frame 631, and the limiting block 6322 is slidably fitted into the limiting groove 6321.

[0049] The sliding fit between the limiting block 6322 and the limiting groove 6321 can restrict the circumferential rotation of the positioning block 632, so that the positioning block 632 can only rise and fall smoothly in the vertical direction, avoiding the synchronous rotation of the positioning block 632 when the threaded rod 634 rotates, ensuring that the positioning block 632 can be accurately embedded in the positioning groove 633, and improving the reliability of positioning and the smoothness of operation.

[0050] Specifically, the installation mechanism 6 adopts a detachable structure with plug-in and interlocking positioning, which not only ensures the firmness of the connection between the wedge block 4 and the upper flange 21, and can withstand the guiding load and impact load during the docking process of the upper tower section 2 and the lower tower section 3, but also can be quickly dismantled and recycled after installation, without occupying the permanent structure of the upper tower section 2, without affecting the subsequent anti-corrosion treatment and aerodynamic shape of the upper tower section 2, and the components can be reused, effectively reducing the project cost.

[0051] like Figure 7-8 As shown, in this embodiment, the lower flange 31 is detachably connected to the guide block 5 via the support mechanism 7.

[0052] like Figure 7 As shown, the support mechanism 7 includes two symmetrically arranged L-shaped plates 71. Both L-shaped plates 71 are fixedly welded to the outer side wall of the lower flange 31, and two guide blocks 5 are respectively assembled on the inner side of the two L-shaped plates 71.

[0053] The L-shaped plate 71 provides a stable bearing and limiting foundation for the guide block 5, and can simultaneously withstand lateral and vertical loads during the guiding process. It has high connection strength, and the L-shaped plate 71 is arranged close to the outer side of the lower tower section 3, resulting in a compact structure and small space occupation.

[0054] like Figure 7 As shown, a T-shaped block 51 is fixed on the back side of the guide block 5, and a T-shaped groove 52 adapted to the T-shaped block 51 is opened on the inner side wall of the L-shaped plate 71. The side of the T-shaped groove 52 away from the lower tower section 3 is connected to the outside. The T-shaped block 51 can slide into the opening of the T-shaped groove 52 to realize the insertion and assembly of the guide block 5 and the L-shaped plate 71.

[0055] The insertion and engagement of the T-shaped block 51 and the T-shaped groove 52 allows the assembly and disassembly of the guide block 5 to be completed by sliding in the horizontal direction. This requires little operating space and is suitable for narrow working environments. At the same time, the T-shaped structure can withstand large vertical and lateral loads and will not detach or deform during the guiding process.

[0056] like Figure 8 As shown, a first magnetic suction member 521 is fixed to one side of the lower section of the tower 3 inside the T-shaped groove 52, and a second magnetic suction member 511 is fixed to one side of the lower section of the tower 3 inside the T-shaped block 51.

[0057] The first magnetic attractor 521 and the second magnetic attractor 511 are positioned opposite each other and have opposite magnetic poles, so they can attract each other to achieve automatic positioning of the guide block 5 after it slides in, preventing it from accidentally sliding out.

[0058] It should be noted that after the guide block 5 slides into place, it can be automatically attracted and locked by the magnetic attraction of the first magnetic suction component 521 and the second magnetic suction component 511. No additional fasteners such as bolts and pins are required, which makes the assembly speed fast and significantly shortens the pre-assembly time. At the same time, it can effectively prevent the guide block 5 from accidentally sliding out of the T-slot 52 due to sea wind vibration and the swaying of the upper tower section 2 and the lower tower section 3 during the hoisting process, thus ensuring the stability of the guiding process. When removing the guide block 5, only an outward pulling force needs to be applied to overcome the magnetic force to remove it. The operation is simple and is especially suitable for high-altitude operations at sea, which can reduce the operation steps and safety risks for operators.

[0059] It should be noted that the conventional tower consists of four sections. The tower, wind turbine, and blades are hoisted separately. The upper tower section 2 is a short tower designed to achieve the overall installation of the wind turbine. The other tower sections can also be installed using the installation structure.

[0060] Example 2: The installation structure and usage method of the integral tower of a floating offshore wind turbine include the following steps: S1. First, fix the mounting block 61 to the top of the upper flange 21 with bolts at the preset position; Align the connecting hole 62 of the wedge block 4 with the mounting block 61, and push the wedge block 4 radially inward along the tower cylinder so that the guide block 621 slides along the guide groove 622 until the inner side of the wedge block 4 fits against the outer wall of the upper flange 21. Then rotate the knob 635 to drive the threaded rod 634 to rotate, which in turn drives the positioning block 632 to slide down and lock into the positioning groove 633, thus completing the assembly and locking of the wedge block 4. S2. Simultaneously weld and fix the two L-shaped plates 71 symmetrically to the outside of the lower flange 31 at the preset positions; Align the T-shaped block 51 of the guide block 5 with the front opening of the T-shaped groove 52 and push it inward until the first magnetic suction member 521 and the second magnetic suction member 511 attract and position each other. At this time, the inclined surfaces of the two guide blocks 5 are opposite to each other, forming a guide channel that is wider at the top and narrower at the bottom, thus completing the assembly of the guide block 5. S3. After the upper tower section 2 and the wind turbine 1 are assembled as a whole, they are lifted by a crane ship and transported to the top of the lower tower section 3. By finely adjusting the circumferential angle of the upper tower section 2 with the lifting equipment, the four sets of wedge blocks 4 fall into the upper opening range of the four sets of guide blocks 5 respectively, thus completing the initial alignment; S4. Control the lifting device to slowly lower the upper tower section 2. The bottom of the wedge block 4 first contacts the lower flange 31. Under the action of its inclined bottom surface, the upper tower section 2 and the lower tower section 3 are axially aligned. As it continues to descend, the wedge block 4 will contact the inclined top surface of the two guide blocks 5, causing the wedge block 4 to slide downward along the inclined surface of the guide blocks 5. Since the bottom of the wedge block 4 is arc-shaped, it can rotate adaptively during the sliding process, automatically correcting the circumferential offset of the upper tower section 2. Under the combined action of multiple sets of wedge blocks 4 and guide blocks 5, the upper flange 21 and the lower flange 31 are coaxially aligned, and the flange bolt holes correspond one by one. S5. After the upper flange 21 and the lower flange 31 are fully fitted, the operator puts on the flange connecting bolts and tightens them diagonally according to the torque required by the specification to complete the docking and fixing of the upper tower section 2 and the lower tower section 3. S6. After installation, rotate the knob 635 in the opposite direction to drive the positioning block 632 upward out of the positioning groove 633, release the lock of the wedge block 4, and pull the wedge block 4 out radially outward to remove it. Then slide the guide block 5 outward along the T-shaped groove 52 and remove it after overcoming the magnetic attraction force.

[0061] It should be noted that before installation, the upper flange 21 and the lower flange 31 will have the installation positions of the mounting block 61 and the two L-shaped plates 71 preset respectively. These preset positions are determined by the unique relative positional relationship between the wedge block 4 and the two guide blocks 5 when they slide to the end point.

[0062] Furthermore, multiple sets of mounting blocks 61 and corresponding L-shaped plates 71 are arranged in a ring array along the flange circumference in a synchronous manner, matching the distribution pattern of flange bolt holes. This ensures that when the wedge block 4 slides down along the guide block 5 to the docking end point, the axes of the upper flange 21 and the lower flange 31 are completely coincident, and all flange connection bolt holes can be stably and accurately aligned one by one.

[0063] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A floating offshore wind turbine integral tower installation structure, comprising a wind turbine (1), an upper tower section (2) fixed below the wind turbine (1), and a lower tower section (3) below the upper tower section (2), characterized in that: The upper section of the tower (2) has a wedge-shaped block (4) on the outer side of its lower edge, and the lower section of the tower (3) has two symmetrically distributed guide blocks (5) on the outer side of its upper edge, which correspond to the wedge-shaped block (4). The tops of the two guide blocks (5) are both inclined downwards on opposite sides, and the wedge block (4) is slidably connected between the two guide blocks (5) on opposite sides; The bottom of the wedge block (4) is arc-shaped and tilts upward on the side near the upper tower section (2); The bottom of the upper tower section (2) is equipped with an upper flange (21), which is connected to the wedge block (4) through the installation mechanism (6); The lower section of the tower (3) is fitted with a lower flange (31) at the top, and the lower flange (31) is connected to the guide block (5) via a support mechanism (7).

2. The floating offshore wind turbine tower installation structure according to claim 1, characterized in that: The mounting mechanism (6) includes a mounting block (61) which is fixed to the top of the upper flange (21); The wedge block (4) has a connecting hole (62) along the radial direction of the upper tower section (2), and the mounting block (61) is slidably connected to the inside of the connecting hole (62); The wedge block (4) has a positioning component (63) on top for positioning the mounting block (61).

3. The floating offshore wind turbine tower installation structure according to claim 2, characterized in that: The positioning component (63) includes a positioning frame (631) which is mounted on top of the wedge block (4); The positioning frame (631) has a sliding connection inside with a positioning block (632) extending into the connection hole (62). The top of the mounting block (61) is provided with a positioning groove (633) that fits into the positioning block (632). The top of the positioning block (632) is rotatably connected to a threaded rod (634) extending to the top of the positioning frame (631), and the threaded rod (634) is threadedly connected to the positioning frame (631). A knob (635) is fixed to the top of the threaded rod (634).

4. The floating offshore wind turbine tower installation structure according to claim 2, characterized in that: A guide block (621) is provided on the inner side of the connecting hole (62); The outer side of the mounting block (61) is provided with a guide groove (622) corresponding to the guide block (621); The side of the guide groove (622) away from the upper tower section (2) is connected to the outside, and the guide block (621) is slidably connected inside the guide groove (622).

5. The floating offshore wind turbine tower installation structure according to claim 3, characterized in that: A limiting groove (6321) is provided on the outer side of the positioning block (632), and both ends of the limiting groove (6321) are connected to the outside. A limiting block (6322) is fixed inside the positioning frame (631), and the limiting block (6322) is slidably connected inside the limiting groove (6321).

6. The floating offshore wind turbine tower installation structure according to claim 1, characterized in that: The support mechanism (7) includes two symmetrically distributed L-shaped plates (71), both of which are fixed to the outside of the lower flange (31); The two guide blocks (5) are located inside the two L-shaped plates (71) respectively.

7. The floating offshore wind turbine tower installation structure according to claim 6, characterized in that: T-shaped blocks (51) are provided on the opposite side of the two guide blocks (5), and T-shaped grooves (52) corresponding to the T-shaped blocks (51) are provided on the inner side of the two L-shaped plates (71). The side of the T-slot (52) away from the lower tower section (3) is connected to the outside, and the two T-blocks (51) are slidably connected to the inside of the two T-slots (52).

8. The floating offshore wind turbine tower installation structure according to claim 7, characterized in that: The T-shaped groove (52) has a first magnetic suction element (521) on the side near the lower tower section (3) inside. The T-shaped block (51) is provided with a second magnetic suction element (511) on the side near the lower tower section (3). The first magnetic attractor (521) and the corresponding second magnetic attractor (511) are magnetically attracted to each other.

9. The floating offshore wind turbine tower installation structure according to claim 1, characterized in that: There are multiple sets of wedge blocks (4) and two guide blocks (5), which are distributed in a circular array on the outside of the upper tower section (2) and the lower tower section (3), respectively.

10. A method for using a floating offshore wind turbine integral tower installation structure, as described in any one of claims 1-9, characterized in that: Includes the following steps: S1. At the upper flange (21) of the upper section of the tower (2), the wedge block (4) is assembled and locked radially along the tower by means of the installation mechanism (6); S2. At the lower flange (31) of the lower section of the tower (3), the pair of guide blocks (5) are assembled and positioned by the support mechanism (7) so that the relative inclined surfaces of the top of the two guide blocks (5) are set opposite to each other. S3. Lift the entire upper tower section (2) assembled with the wind turbine (1), move it directly above the lower tower section (3), and adjust the circumferential angle so that each set of wedge blocks (4) is respectively inserted into the upper opening between the two guide blocks (5) of each set; S4. Slowly lower the upper tower section (2), and slide the bottom of the wedge block (4) along the outside of the lower flange (31) to complete the axial alignment; As it continues downward, the wedge block (4) slides down along the top surface of the two guide blocks (5), passing through the bottom of the wedge block (4) and the top of the two guide blocks (5), and rotates adaptively during the sliding process to automatically correct the circumferential offset of the upper tower section (2); Through the combined action of multiple sets of wedge blocks (4) and guide blocks (5), the upper flange (21) and the lower flange (31) are coaxially aligned, and the bolt holes correspond one by one; S5. When the upper flange (21) and the lower flange (31) are fully fitted, the crane can loosen the hook to relieve the force. The operator installs the flange connection bolts and tightens them diagonally according to the torque required by the specification to complete the docking and fixing of the upper tower section (2) and the lower tower section (3). S6. After installation, first release the locking of the wedge block (4) through the installation mechanism (6), and pull the wedge block (4) outward in a radial direction to remove it; Then, the guide block (5) is removed from inside the L-shaped plate (71) by the support mechanism (7).

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