Wind turbine generator hoisting device and process suitable for severe sea conditions

Abstract

The wind turbine generator hoisting device comprises a self-elevating platform ship, a transport ship, a transportation platform and a storage platform, a U-shaped barge loading opening is formed in the tail of the self-elevating platform ship, the transportation platform is placed and installed at the tail of the transport ship, and the storage platform is installed on the transportation platform in a limited mode; fan blades and a tower drum are placed on the storage platform, at least four sets of longitudinal lifting positioning assemblies, horizontal clamping assemblies and lifting assemblies are arranged in the U-shaped barge loading opening, the longitudinal lifting positioning assemblies press down and fix the transportation platform, the horizontal clamping assemblies movably clamp and fix the two sides of the transportation platform, and the lifting assemblies lift the bottom of the storage platform to be separated from the transportation platform. The self-elevating platform ship has the advantages that the self-elevating platform ship and the transportation platform can be relatively stably fixed, so that the wind turbine generator can be stably lifted and hoisted.

Description

Technical Field

[0001] The present invention relates to the field of wind power technology, and in particular to a wind turbine hoisting device and process suitable for severe sea conditions. Background Art

[0002] Currently, there are three main methods for offshore wind turbine installation. One is offshore split installation, which involves using a transport vessel to transport the wind turbine foundation, tower, nacelle, and blades to the construction site, and then installing the wind turbines in sequence according to the construction sequence. However, this method is not suitable for deep-sea and large-scale wind turbines. Considering the performance of the ship and turbine, the water depth of deep-sea wind farms is generally over 60 meters, and some wind farms are close to 100 meters deep. The water depth alone exceeds the pile leg limit of most existing offshore wind turbine installation vessels. Floating cranes generally have difficulty meeting the lifting height requirements of split-type installation of large wind turbines. In addition, deep-sea wind farms are faced with strong winds and waves, frequent lifting operations, and a large amount of high-altitude installation work, which brings great difficulties to offshore lifting operations and installation.

[0003] The second type is offshore floating wind turbines. Their long-term stability and safety in adverse weather conditions remain to be considered. Operating in a floating ocean environment will reduce the turbine's power generation efficiency. Offshore floating wind turbines are also expensive to construct and maintain. Therefore, they are not suitable for widespread use.

[0004] The third method is the integrated installation of offshore wind turbines. The wind turbines are first pre-assembled and debugged on a flat barge at the dock, and then the assembled offshore wind turbines are towed to the installation sea area using the flat barge. This method has certain application value, but the integrated installation of offshore wind turbines currently in practice at home and abroad has a complex tooling structure, involving too many parts and complex connection methods, resulting in cumbersome operating steps during installation and disassembly. The installation and disassembly process is multi-step and time-consuming, which seriously slows down the overall progress of offshore wind turbine installation and extends the project cycle. In addition, the tooling has poor versatility. In addition, long-term offshore installation operations and complex operating processes lead to fatigue among personnel, thereby increasing safety risks during the construction process. The limitations of traditional tooling and construction technology have also hindered the promotion of integrated installation of offshore wind turbines to a certain extent, and are not conducive to the improvement of the installation technology and process level of deep-sea and large-scale wind turbines. Summary of the Invention

[0005] The purpose of the present invention is to provide a wind turbine hoisting device and process suitable for severe sea conditions, which can achieve relatively stable fixation of a self-elevating platform ship and a transport platform, thereby enabling stable lifting and hoisting of the wind turbine.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A wind turbine hoisting device applicable to severe sea conditions, characterized in that it includes a jack-up platform ship, a transport ship, a transport platform and a storage platform. A U-shaped barge loading port is provided at the tail of the jack-up platform ship. The transport platform is placed and installed at the tail of the transport ship. The storage platform is installed on the transport platform in a limited position. Wind turbine blades and tower barrels are placed on the storage platform. At least four groups of longitudinal lifting and positioning components, horizontal clamping components and lifting components are arranged in the U-shaped barge loading port. The longitudinal lifting and positioning components press down and fix the transport platform. The horizontal clamping components movably clamp and fix both sides of the transport platform. The lifting components lift the bottom of the storage platform to separate it from the transport platform.

[0008] Preferably, each group of the longitudinal lifting and positioning components includes a first lifting seat and a lifting column. The first lifting seat is arranged on the transport ship around the U-shaped barge loading port. The lifting column is vertically arranged in the first lifting seat in a lifting manner. Two groups of driving motors are respectively arranged on both sides of the lifting column in the first lifting seat, and each group is provided with a plurality of driving motors. Two groups of longitudinally installed racks are correspondingly arranged on both sides of the lifting column. Tooth grooves are formed on both sides of the rack. Output gears are arranged on both sides of the output end of the driving motor on the rack. The output gears are engaged and driven with the tooth grooves on both sides of the rack.

[0009] Preferably, a pressing pad is arranged at the bottom of the lifting column of each group of longitudinal lifting and positioning components corresponding to the transport platform. The pressing pad is arranged around the storage platform and abuts against the bottom of the lifting column.

[0010] Preferably, the horizontal clamping components are arranged on the jack-up platform ship at the lower part of the U-shaped barge loading port. An accommodating groove is formed on the inner side of the lower part of the U-shaped barge loading port. Each group of the horizontal clamping components includes a main cylinder, a sub-cylinder, a connecting seat and a fixed seat. The bottom of the main cylinder is movably hinged to the side wall of the accommodating groove. The bottom end of the connecting seat is movably hinged to the bottom of the accommodating groove. The output end of the main cylinder is movably hinged to the upper part of the side wall of the connecting seat. The top end of the connecting seat is movably hinged to the inner side of the fixed seat. Two groups of movable wheels are installed on the outer side of the fixed seat along the vertical direction. The movable wheels are fitted and positioned with both sides of the transport platform.

[0011] Preferably, limiting grooves are formed on both sides of the transport platform corresponding to each group of the horizontal clamping components. The limiting grooves are cross-shaped. The inner wall of the limiting groove is fitted and positioned with the movable wheels. Two groups of limiting components are respectively arranged on both sides of each group of fixed seats corresponding to both sides of the limiting groove. Each group of the limiting components includes a limiting wheel, a limiting cylinder and a limiting seat. One end of the limiting cylinder and the limiting seat is movably hinged to the side wall of the limiting groove. The output end of the limiting cylinder is movably hinged to the upper part of the limiting seat. The limiting wheel is rotatably connected to the other end of the limiting seat. A movable groove is vertically formed in the fixed seat corresponding to the limiting wheel. The limiting wheel is fitted and limited with the inner side of the movable groove.

[0012] Preferably, a gravity sensor is provided inside the fixed seat, and an adjusting cylinder is also movably hinged between the lower part of the inner side of the fixed seat and the connecting seat.

[0013] Preferably, the lifting assembly includes a second lifting seat, a horizontal seat, a vertical bracket and a horizontal bracket. The second lifting seat is fixedly installed inside the U-shaped loading opening. The vertical bracket is arranged to move up and down inside the second lifting seat. The horizontal seat is fixedly installed at the bottom of the second lifting seat. The horizontal bracket is horizontally movably arranged inside the horizontal seat. Two groups of driving motors are arranged on both sides of the vertical bracket and the horizontal bracket respectively for the second lifting seat and the horizontal seat, and each group is provided with a plurality of driving motors. Two groups of racks are correspondingly arranged on both sides of the vertical bracket and the horizontal bracket. Tooth grooves are formed on both sides of the rack. Output gears are arranged on both sides of the rack at the output end of the driving motor. The output gears are engaged with the tooth grooves on both sides of the rack for transmission.

[0014] Preferably, a plurality of groups of limit baffles are arranged in an array around the storage platform on the transportation platform, and the storage platform is limited and clamped inside the transportation platform.

[0015] Preferably, two groups of lifting openings are arranged on both sides of the storage platform corresponding to the horizontal brackets, and the horizontal brackets are horizontally inserted into the lifting openings.

[0016] A hoisting process for a wind turbine suitable for severe sea conditions, characterized by comprising the following steps:

[0017] Place the wind turbine blade and the tower barrel on the storage platform, and then hoist the storage platform as a whole onto the transportation platform at the tail of the transport ship. The transport ship transports the transportation platform to the U-shaped loading opening at the tail of the jack-up platform ship at sea, and aligns the transportation platform to enter the U-shaped loading opening. The horizontal clamping assembly inside the U-shaped loading opening clamps and relatively fixes both sides of the transportation platform in the left-right direction. Then, the limiting assembly inside the transportation platform clamps and relatively fixes the fixed seat inside the horizontal clamping assembly in the front-back direction. Then, the longitudinal lifting and positioning assembly lowers the lifting column to fit with the upper and lower pressing plates of the transportation platform, presses down the transportation platform, and realizes relative fixation in the longitudinal direction under the action of seawater buoyancy. Then, drive the second lifting seat of the lifting assembly to lower the vertical bracket to the corresponding position, and drive the horizontal seat to extend into the lifting openings on both sides of the storage platform. Subsequently, lift the storage platform as a whole by the second lifting seat to separate it from the transportation platform, and then the subsequent hoisting of the wind turbine can be realized.

[0018] In summary, the beneficial effects of the present invention are as follows: The present invention can realize six-directional limit fixation of the jack-up platform ship and the transportation platform in the up, down, left, right, front, and back directions through the vertical lifting and positioning assembly, the horizontal clamping assembly, and the limit assembly respectively, without being affected by external harsh sea conditions. Subsequently, through the lifting assembly, the separation of the storage platform and the transportation platform can be realized. After lifting the storage platform for placing the wind turbine blades and the tower barrel, the hoisting of the wind turbine can be stably realized subsequently. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the position before hoisting of a wind turbine hoisting device applicable to harsh sea conditions according to the present invention;

[0020] Figure 2 is a schematic diagram of the position during hoisting of a wind turbine hoisting device applicable to harsh sea conditions according to the present invention;

[0021] Figure 3 is a schematic structural diagram of the jack-up platform ship before hoisting in a wind turbine hoisting device applicable to harsh sea conditions according to the present invention;

[0022] Figure 4 is a schematic structural diagram of the jack-up platform ship during hoisting in a wind turbine hoisting device applicable to harsh sea conditions according to the present invention;

[0023] Figure 5 is a schematic structural diagram of the transportation platform and the storage platform in the jack-up platform of a wind turbine hoisting device applicable to harsh sea conditions according to the present invention;

[0024] Figure 6 is a schematic structural diagram of the jack-up platform ship after hoisting is completed in a wind turbine hoisting device applicable to harsh sea conditions according to the present invention;

[0025] In the figure: 1, jack-up platform ship; 2, transport ship; 3, transportation platform; 4, storage platform; 5, U-shaped barge loading port; 6, first lifting seat; 7, lifting column; 8, drive motor; 9, rack; 10, pressing pad; 11, receiving groove; 12, main cylinder; 13, adjusting cylinder; 14, connecting seat; 15, fixed seat; 16, movable wheel; 17, limiting groove; 18, limiting wheel; 19, limiting cylinder; 20, limiting seat; 21, movable groove; 22, lifting port; 23, second lifting seat; 24, horizontal seat; 25, vertical bracket; 26, horizontal bracket; 27, limiting baffle. DETAILED DESCRIPTION OF THE INVENTION

[0026] The following further describes the specific embodiments of the present invention in conjunction with the drawings. This embodiment does not constitute a limitation to the present invention.

[0027] As Figures 1 to 6The described wind turbine hoisting device applicable to severe sea conditions includes a jack-up platform ship 1, a transport ship 2, a transport platform 3, and a storage platform 4. A U-shaped barge loading opening 5 is provided at the tail of the jack-up platform ship 1. The transport platform 3 is placed and installed at the tail of the transport ship 2. The storage platform 4 is installed in a limited position on the transport platform 3. Wind turbine blades and tower barrels are placed on the storage platform 4. At least four groups of longitudinal lifting and positioning components, horizontal clamping components, and lifting components are provided in the U-shaped barge loading opening 5. The longitudinal lifting and positioning components press down and fix the transport platform 3. The horizontal clamping components movably clamp and fix both sides of the transport platform 3. The lifting components lift the bottom of the storage platform 4 to separate it from the transport platform 3.

[0028] Each group of longitudinal lifting and positioning components includes a first lifting seat 6 and a lifting column 7. The first lifting seat 6 is arranged on the transport ship 2 around the U-shaped barge loading opening 5. The lifting column 7 is vertically arranged for lifting and lowering within the first lifting seat 6. On both sides of the lifting column 7 within the first lifting seat 6, two groups of driving motors 8 are respectively arranged, and each group has multiple driving motors 8. Two groups of longitudinally installed racks 9 are correspondingly arranged on both sides of the lifting column 7. Tooth grooves are provided on both sides of the rack 9. Output gears are arranged at the output ends of the driving motors 8 on both sides of the rack 9, and the output gears are engaged and driven with the tooth grooves on both sides of the rack 9.

[0029] At the bottom of the lifting column 7 corresponding to each group of longitudinal lifting and positioning components on the transport platform 3, a pressing pad 10 is provided. The pressing pad 10 is arranged around the storage platform 4 and abuts against the bottom of the lifting column 7.

[0030] The horizontal clamping components are arranged on the jack-up platform ship 1 at the lower part of the U-shaped barge loading opening 5. An accommodation groove 11 is provided on the inner side of the lower part of the U-shaped barge loading opening 5. Each group of horizontal clamping components includes a main cylinder 12, a connecting seat 14, and a fixing seat 15. The bottom of the main cylinder 12 is movably hinged to the side wall of the accommodation groove 11. The bottom end of the connecting seat 14 is movably hinged to the bottom of the accommodation groove 11. The output end of the main cylinder 12 is movably hinged to the upper part of the side wall of the connecting seat 14. The top end of the connecting seat 14 is movably hinged to the inner side of the fixing seat 15. Two groups of movable wheels 16 are installed along the vertical direction on the outer side of the fixing seat 15, and the movable wheels 16 are in contact and positioning with both sides of the transport platform 3.

[0031] Limit grooves 17 are provided on both sides of the transport platform 3 corresponding to each group of horizontal clamping components. The limit grooves 17 are cross-shaped. The inner wall of the limit groove 17 is in contact and positioning with the movable wheels 16. Two groups of limit components are respectively arranged on both sides of each group of fixing seats 15 corresponding to both sides of the limit groove 17. Each group of limit components includes a limit wheel 18, a limit cylinder 19, and a limit seat 20. One end of the limit cylinder 19 and the limit seat 20 are movably hinged to the side wall of the limit groove 17. The output end of the limit cylinder 19 is movably hinged to the upper part of the limit seat 20. The limit wheel 18 is rotatably connected to the other end of the limit seat 20. A movable groove 21 is vertically provided on the fixing seat 15 corresponding to the limit wheel 18, and the limit wheel 18 is in contact and limiting with the inner side of the movable groove 21.

[0032] A gravity sensor is arranged inside the fixed seat 15. An adjusting cylinder 13 is also movably hinged between the lower part of the inner side of the fixed seat 15 and the connecting seat 14. The gravity sensor senses the setting direction of the fixed seat 15, and drives the adjusting cylinder 13 to make the fixed seat 15 always in a vertical state, so as to stably clamp both sides of the transportation platform 3.

[0033] The lifting assembly includes a second lifting seat 23, a horizontal seat 24, a vertical bracket 25 and a horizontal bracket 26. The second lifting seat 23 is fixedly installed inside the U-shaped loading opening 5. The vertical bracket 25 is arranged to move up and down inside the second lifting seat 23. The horizontal seat 24 is fixedly installed at the bottom of the second lifting seat 23. The horizontal bracket 26 is horizontally movably arranged inside the horizontal seat 24. Two groups of driving motors 8 are arranged on both sides of the vertical bracket 25 and the horizontal bracket 26 respectively by the second lifting seat 23 and the horizontal seat 24, and each group is provided with a plurality of driving motors 8. Two groups of racks 9 are correspondingly arranged on both sides of the vertical bracket 25 and the horizontal bracket 26. Tooth grooves are formed on both sides of the rack 9. Output gears are arranged on both sides of the rack 9 at the output ends of the driving motors 8, and the output gears are engaged with the tooth grooves on both sides of the rack 9 for transmission.

[0034] A plurality of groups of limit baffles 27 are arranged in an array around the storage platform 4 on the transportation platform 3, and the storage platform 4 is limited and clamped inside the transportation platform 3.

[0035] Two groups of lifting openings 22 are arranged on both sides of the storage platform 4 corresponding to the horizontal brackets 26. The horizontal brackets 26 are horizontally inserted into the lifting openings 22, and then the storage platform 4 is completely lifted and separated by the lifting assembly.

[0036] A hoisting process for a wind turbine suitable for severe sea conditions includes the following steps:

[0037] The wind turbine blades and the tower barrel are placed on the storage platform 4, and then the storage platform 4 as a whole is hoisted onto the transportation platform 3 at the tail of the transportation ship 2. The transportation ship 2 transports the transportation platform 3 to the U-shaped loading opening 5 at the tail of the jack-up platform ship 1 at sea, and aligns the transportation platform 3 to enter the U-shaped loading opening 5. The horizontal clamping assembly inside the U-shaped loading opening 5 clamps and relatively fixes both sides of the transportation platform 3 in the left-right direction. Then, the limiting assembly inside the transportation platform 3 clamps and relatively fixes the fixed seat 15 inside the horizontal clamping assembly in the front-back direction. Then, the longitudinal lifting and positioning assembly lowers the lifting column 7 to fit with the upper and lower pressing plates 10 of the transportation platform 3, presses down the transportation platform 3, and realizes relative fixation in the longitudinal direction under the action of seawater buoyancy. Then, the second lifting seat 23 of the lifting assembly is driven to lower the vertical bracket 25 to the corresponding position, and the horizontal seat 24 is driven to extend into the lifting openings 28 on both sides of the storage platform 4. Subsequently, the storage platform 4 is lifted as a whole by the second lifting seat 23 to be separated from the transportation platform 3, and the subsequent hoisting of the wind turbine can be realized.

[0038] The present invention can respectively realize the six-directional limit fixation of the jack-up platform ship and the transportation platform in the up-down, left-right, front-back directions through the vertical lifting and positioning assembly, the horizontal clamping assembly and the limit assembly, without being affected by external harsh sea conditions. Subsequently, through the lifting assembly, the separation of the storage platform and the transportation platform can be realized. After the storage platform for placing the wind turbine blades and the tower is lifted, the hoisting of the wind turbine can be stably realized subsequently.

[0039] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the technical solution of the present invention.

Claims

1. A hoisting device for a wind turbine suitable for severe sea conditions, characterized in that, It includes a jack-up platform vessel, a transport ship, a transport platform and a storage platform. A U-shaped barge loading opening is provided at the tail of the jack-up platform vessel. The transport platform is placed and installed at the tail of the transport ship. The storage platform is installed in a limited position on the transport platform. Wind turbine blades and tower barrels are placed on the storage platform. At least four groups of longitudinal lifting and positioning components, horizontal clamping components and lifting components are provided in the U-shaped barge loading opening. The longitudinal lifting and positioning components press down and fix the transport platform. The horizontal clamping components movably clamp and fix both sides of the transport platform. The lifting components lift the bottom of the storage platform to separate it from the transport platform.

2. The hoisting device for a wind turbine applicable to severe sea conditions according to claim 1, wherein: Each group of the longitudinal lifting and positioning components includes a first lifting seat and a lifting column. The first lifting seat is arranged on the transport ship around the U-shaped barge loading opening. The lifting column is vertically arranged for lifting and lowering in the first lifting seat. On both sides of the lifting column in the first lifting seat, two groups of driving motors are respectively arranged, and each group is provided with a plurality of driving motors. On both sides of the lifting column, two groups of longitudinally installed racks are correspondingly arranged. Tooth grooves are opened on both sides of the rack. Output gears are arranged at the output ends of the driving motors on both sides of the rack. The output gears are engaged and driven with the tooth grooves on both sides of the rack.

3. The hoisting device for a wind turbine applicable to severe sea conditions according to claim 2, wherein: At the bottom of the lifting column of each group of longitudinal lifting and positioning components corresponding to the transport platform, a pressing pad is provided. The pressing pad is arranged around the storage platform and abuts against the bottom of the lifting column.

4. The hoisting device for a wind turbine applicable to severe sea conditions according to claim 1, wherein: The horizontal clamping components are arranged on the jack-up platform vessel at the lower part of the U-shaped barge loading opening. A receiving groove is opened on the inner side of the lower part of the U-shaped barge loading opening. Each group of the horizontal clamping components includes a main cylinder, a sub-cylinder, a connecting seat and a fixing seat. The bottom of the main cylinder is movably hinged to the side wall of the receiving groove. The bottom end of the connecting seat is movably hinged to the bottom of the receiving groove. The output end of the main cylinder is movably hinged to the upper part of the side wall of the connecting seat. The top end of the connecting seat is movably hinged to the inner side of the fixing seat. Two groups of movable wheels are installed on the outer side of the fixing seat along the vertical direction. The movable wheels are in contact and positioning with both sides of the transport platform.

5. The hoisting device for a wind turbine applicable to severe sea conditions according to claim 4, characterized in that: Limit grooves are opened on both sides of the transport platform corresponding to each group of the horizontal clamping components. The limit grooves are cross-shaped. The inner walls of the limit grooves are in contact and positioning with the movable wheels. On both sides of each group of the fixing seats corresponding to both sides of the limit grooves, two groups of limiting components are respectively arranged. Each group of the limiting components includes a limiting wheel, a limiting cylinder and a limiting seat. One ends of the limiting cylinder and the limiting seat are movably hinged to the side wall of the limit groove. The output end of the limiting cylinder is movably hinged to the upper part of the limiting seat. The limiting wheel is rotatably connected to the other end of the limiting seat. An activity groove is vertically opened on the fixing seat corresponding to the limiting wheel. The limiting wheel is in contact and limiting with the inner side of the activity groove.

6. The hoisting device for a wind turbine applicable to severe sea conditions according to claim 4, wherein: A gravity sensor is arranged inside the fixing seat. An adjusting cylinder is also movably hinged between the lower part of the inner side of the fixing seat and the connecting seat.

7. The hoisting device for a wind turbine applicable to severe sea conditions according to claim 1, characterized in that: The lifting assembly includes a second lifting seat, a horizontal seat, a vertical bracket and a horizontal bracket. The second lifting seat is fixedly installed inside the U-shaped loading opening. The vertical bracket is arranged to move up and down inside the second lifting seat. The horizontal seat is fixedly installed at the bottom of the second lifting seat. The horizontal bracket is horizontally movably arranged inside the horizontal seat. Two sets of driving motors are arranged on both sides of the vertical bracket and the horizontal bracket respectively on both sides of the second lifting seat and the horizontal seat, and each set is provided with a plurality of driving motors. Two sets of racks are correspondingly arranged on both sides of the vertical bracket and the horizontal bracket. Tooth grooves are formed on both sides of the rack. Output gears are arranged on both sides of the rack at the output end of the driving motor. The output gears are engaged with the tooth grooves on both sides of the rack for transmission.

8. A hoisting device for a wind turbine applicable to severe sea conditions according to claim 1, characterized in that: A plurality of groups of limit baffles are arranged around the storage platform on the transportation platform in an array, and the storage platform is limited and clamped inside the transportation platform.

9. The hoisting device for a wind turbine applicable to severe sea conditions according to claim 7, wherein: Two sets of lifting openings are arranged on both sides of the storage platform corresponding to the horizontal brackets, and the horizontal brackets are horizontally inserted into the lifting openings.

10. A hoisting process for a wind turbine applicable to severe sea conditions, characterized in that: It includes the following steps: Place the wind turbine blade and the tower barrel on the storage platform, and then hoist the entire storage platform onto the transportation platform at the tail of the transport ship. The transport ship transports the transportation platform to the U-shaped loading opening at the tail of the jack-up platform ship at sea, and aligns the transportation platform to enter the U-shaped loading opening. The horizontal clamping assembly inside the U-shaped loading opening clamps and relatively fixes both sides of the transportation platform in the left-right direction. Then, the limiting assembly inside the transportation platform clamps and relatively fixes the fixing seat inside the horizontal clamping assembly in the front-back direction. Then, the longitudinal lifting and positioning assembly lowers the lifting column to fit with the upper and lower pressing plates of the transportation platform, presses down the transportation platform, and realizes relative fixation in the longitudinal direction under the action of the buoyancy of the sea water. Then, drive the second lifting seat of the lifting assembly to lower the vertical bracket to the corresponding position, and drive the horizontal seat to extend into the lifting openings on both sides of the storage platform. Subsequently, lift the entire storage platform by the second lifting seat to separate it from the transportation platform, and then the subsequent hoisting of the wind turbine unit can be realized.

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