Construction method for synchronously hoisting double-end fan wing-shaped tower by adopting bilateral crane

Abstract

The invention discloses a construction method for synchronously hoisting a double-end fan wing-shaped tower by adopting a bilateral crane, which comprises the step of pre-butting a third tower and a second tower to realize the pre-butting of two groups of butting flange hole sites of the third tower and the second tower. Before a cabin adapter and a third tower combination assembly are installed, a third tower is firstly in butt joint with a butt flange hole position of a second tower in advance, and then the cabin adapter and the third tower combination assembly are in butt joint with a first tower and a second tower combination assembly subsequently. The situation that butt joint cannot be guaranteed after hoisting to the high altitude and then hoisting needs to be conducted is avoided, and the problem that in the prior art, hoisting needs to be conducted after butt joint cannot be guaranteed after hoisting to the high altitude, and the construction efficiency is reduced is solved.

Description

Technical Field

[0001] The invention relates to a construction method for synchronously hoisting a double-head wind turbine wing-shaped tower by using double-sided cranes, and belongs to the technical field of offshore wind turbine hoisting. Background Art

[0002] In offshore wind power development, two independent main engines share a single tower to form a twin-ended wind turbine. Safety must be ensured during the hoisting and installation of twin-ended wind turbines.

[0003] The existing dual-head hoisting technology, as shown in Chinese patent publication number CN218595982U, discloses the simultaneous hoisting of towers on both sides of the airfoil tower. However, the tower is composed of multiple sections. For the third tower connected to the nacelle adapter, when it is directly hoisted to a high altitude, if it cannot be guaranteed to be docked with the second tower, it needs to be lowered and then hoisted, which reduces construction efficiency. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a construction method for synchronously hoisting a double-head wind turbine wing-shaped tower using bilateral cranes.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a construction method for synchronously hoisting a double-ended wind turbine wing-shaped tower using bilateral cranes, comprising: Through the step of pre-docking the third tower and the second tower, pre-docking of two groups of docking flange holes of the third tower and the second tower is achieved.

[0007] The step of pre-docking the third tower and the second tower comprises: The third tower is connected to the crane, and a guide pin is installed at a diagonal position on the docking surface of the second tower; the crane is used to ensure that the flange surface where the third tower docks with the second tower is basically in the vertical direction; Control the crane to move the third tower slowly and steadily to the docking position of the second tower and align the guide pins; Align the flange surfaces of the third tower and the second tower, insert all high-strength bolts, and confirm that all bolts can be completely passed without nuts; Remove the bolts, move the crane, return the third tower to its original support position, and remove the crane; Pre-join the joint flange holes of the third tower of another group and the second tower according to the above steps; complete the pre-joint of the two groups of third towers and the second tower.

[0008] After the step of pre-docking the third tower and the second tower, the method further includes a step of hoisting the first tower and the second tower assembly.

[0009] The steps of hoisting the first tower and the second tower assembly include: After confirming that the flange holes of the third tower and the second tower of the two groups are all in the correct position, start hoisting the first tower and the second tower assembly; Lift the combined assembly of the first tower and the second tower to the top of the tower connecting piece by a crane; Continue to lift the combined assembly of the first tower and the second tower so that the flange surface of the first tower is parallel to the installation surface of the tower connector; Rotate the combined assembly of the first tower and the second tower along the axis so that the bolt holes of the end flange of the first tower are aligned with the positioning pins on the tower connecting member; Control the crane to slowly move the first tower and the second tower assembly, and align the bottom flange of the first tower with the tower connector along the positioning pins; Put on all 212 high-strength studs and high-strength nuts on the inside and outside to align the first and second tower assemblies with the tower connectors; According to the above steps, hoist the first tower and the second tower assembly on the other side and align them with the other side of the working tower connection piece; The first tower and the second tower assembly are connected by an intermediate cable, and then the crane is removed.

[0010] After the step of hoisting the first tower and the second tower assembly, the method further includes the step of splicing the cabin adapter and the third tower.

[0011] The step of splicing the nacelle adapter and the third tower includes: First install the platform inside the cabin adapter, then assemble the cabin adapter and the third tower, fasten them with studs, and then hoist the third tower and cabin adapter assembly together, doing it on both sides simultaneously.

[0012] After the step of splicing the nacelle adapter and the third tower, the method further includes the step of hoisting the third tower and the nacelle adapter to form an assembly.

[0013] The step of hoisting the third tower and the nacelle adapter assembly includes: When hoisting the third tower and nacelle adapter assembly, a double-lift hoisting method is used, with both left and right sides hoisting at the same time; Lift the third tower and nacelle adapter assembly, as well as the upwind and downwind inclined cables, to the top of the corresponding second tower; Rotate the third tower and nacelle adapter assembly along the axis, align the bolt holes of the second tower and the middle flange of the third tower, then move the third tower and nacelle adapter assembly by crane, align the middle flange of the third tower and the middle flange of the second tower along the positioning pins, and put on high-strength bolts, high-strength washers, and high-strength nuts to complete the splicing and installation.

[0014] The beneficial effect of the present invention is that before the cabin adapter and the third tower assembly are installed, the third tower is pre-docked with the second tower docking flange hole, and then in the subsequent docking construction of the cabin adapter and the third tower assembly with the first tower and the second tower assembly, it is avoided that after hoisting to a high altitude, it is impossible to ensure that the docking can be achieved and it needs to be lowered and then hoisted again. This solves the problem in the prior art that hoisting to a high altitude cannot ensure that the docking can be achieved and it needs to be lowered and then hoisted again, which reduces the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a distribution structure diagram of the tower connection member, the first tower, and the second tower of the present invention; Figure 2 This is a distribution structure diagram of the first tower and the second tower on both sides of the tower connecting member of the present invention; Figure 3 This invention Figure 2 Schematic diagram of the local enlarged structure at A in the middle; Figure 4 This is a distribution structure diagram of two sets of third towers and cabin adapters during hoisting of the present invention; Figure 5 This is a structural distribution diagram of the third tower and the nacelle adapter when assembled according to the present invention; In the figure: 1-tower connector; 2-first tower; 3-second tower; 4-third tower; 5-nacelle adapter; 6-intermediate cable; 7-upwind oblique cable; 8-downwind oblique cable. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0017] See also Figures 1 to 5 shown.

[0018] The present application discloses a construction method for synchronously hoisting a double-ended wind turbine airfoil tower using a double-sided crane, comprising: S1 hoisting construction preparation 1. Check whether the flange of the foundation section has defects such as coating damage, rust, convex spots, etc., and clean the debris in the foundation; use a flat file to remove burrs and convex spots on the flange surface, and use a cleaning agent to clean the oil and debris on the flange surface.

[0019] 2. Check bolts and other materials to ensure they are not damaged or deformed and that the threads are intact.

[0020] 3. Confirm that the bearing capacity of the foundation of the wind turbine hoisting platform meets the hoisting requirements.

[0021] 4. Confirm that the specifications, quantity and quality of mechanical equipment, lifting equipment, tools and materials meet the lifting requirements.

[0022] 5. Ground resistance report, certification reports from CCS, Maritime Safety Administration and other relevant organizations.

[0023] 6. Check that the firmness of the floating mooring cables meets the lifting requirements.

[0024] 7. The stability of the floating body meets the requirements (as reflected by the results of the floating body tilt test).

[0025] 8. Check the on-site wave conditions to ensure that the foundation float does not fluctuate significantly under such conditions.

[0026] S2 third tower and second tower pre-docking The third tower 4 is connected to the crane, and guide pins are installed at diagonal positions on the docking surface of the second tower 3. The crane is used to ensure that the flange surface where the third tower 4 and the second tower 3 are docked is basically in the vertical direction (angle deviation is about ±2°).

[0027] Control the crane to move the third tower 4 slowly and steadily to the docking surface of the second tower 3 and align the guide pins.

[0028] Align the flange surfaces of the third tower 4 and the second tower 3, insert all high-strength bolts _M56×265, and confirm that all bolts can be completely passed through without nuts.

[0029] Remove the bolts, move the crane, put the third tower 4 back to its original support position, and remove the crane.

[0030] According to the above steps, pre-docking is performed between the docking flange holes of the third tower 4 of another group and the second tower 3 ; and the pre-docking of the two groups of the third tower 4 and the second tower 3 is completed.

[0031] S3 first tower and second tower assembly hoisting After confirming that the flange hole positions of the third tower 4 and the second tower 3 of the two groups are all correct, start hoisting the combined assembly of the first tower 2 and the second tower 3.

[0032] Use a crane to assemble the first tower 2 and the second tower 3 and lift them above the tower connecting member 1; Continue to lift the first tower 2 and the second tower 3 assembly, so that the flange surface of the first tower 2 is parallel to the installation surface of the tower connector 1, as shown in the figure. Figure 1 shown.

[0033] The combined assembly of the first tower 2 and the second tower 3 is rotated along the axis, and the bolt holes of the end flange of the first tower 2 are aligned with the positioning pins on the tower connecting member 1 .

[0034] Control the crane and slowly move the combined assembly of the first tower 2 and the second tower 3 so that the bottom flange of the first tower 2 and the tower connector 1 are aligned along the positioning pins.

[0035] All 212 high-strength studs and high-strength nuts on the inner and outer sides are put on to complete the assembly of the first tower 2 and the second tower 3 and the tower connector 1 .

[0036] According to the above steps, the combined assembly of the first tower 2 and the second tower 3 on the other side is hoisted and mounted on the other side of the working tower connecting piece 1.

[0037] The first tower 2 and the second tower 3 are combined and connected via an intermediate cable 6, and then the crane is removed.

[0038] Before the installation of the cabin adapter 5 and the third tower 4 combined assembly, the third tower 4 is first pre-docked with the second tower 3 docking flange holes, and then the cabin adapter 5 and the third tower 4 combined assembly are docked with the first tower 2 and the second tower 3 combined assembly during the subsequent construction, avoiding the situation where the docking cannot be guaranteed after hoisting to a high altitude and it needs to be lowered and then hoisted again. This solves the problem in the existing technology that hoisting to a high altitude cannot ensure docking and needs to be lowered and then hoisted, which reduces construction efficiency.

[0039] S4 nacelle adapter and the third tower splice First install the platform inside the cabin adapter 5, then assemble the cabin adapter 5 and the third tower 4, fasten them with studs, and then hoist the third tower 4 and the cabin adapter 5 assembly together, and do it on both sides at the same time. Figure 5 shown.

[0040] S5 hoisting the third tower and nacelle adapter assembly When hoisting the combined assembly of the third tower 4 and the nacelle adapter 5 , a double-lift hoisting method is adopted, with the left and right sides hoisting carried out simultaneously.

[0041] The third tower 4 and the nacelle adapter 5 are assembled together, and the upwind inclined cables 7 and the downwind inclined cables 8 are lifted to the top of the corresponding second tower 3. Figure 4 shown.

[0042] Rotate the combined assembly of the third tower 4 and the nacelle adapter 5 along the axis, align the bolt holes of the middle flanges of the second tower 3 and the third tower 4, then move the combined assembly of the third tower 4 and the nacelle adapter 5 by a crane, align the middle flange of the third tower 4 and the middle flange of the second tower 3 along the positioning pins, and put on high-strength bolts, high-strength washers, and high-strength nuts to complete the splicing and installation.

[0043] S6 installation complete After the ground cables are connected to the tower consisting of the first tower 2, the second tower 3 and the third tower 4, the crane is unloaded in sequence to 240t, 230t, 220t...30t, 20t, 10t until it is completely unloaded. This is done simultaneously on both sides and the installation is completed.

Claims

1. A construction method for synchronously hoisting a double-ended wind turbine wing-shaped tower using bilateral cranes, characterized in that: include: The pre-docking step of the third tower and the second tower is used to achieve pre-docking of the two groups of the third tower (4) and the second tower (3) at the docking flange holes.

2. The construction method for synchronously hoisting a double-ended wind turbine airfoil tower using bilateral cranes according to claim 1 is characterized in that: The step of pre-docking the third tower and the second tower comprises: The third tower (4) is connected to the crane, and a guide pin is installed at a diagonal position on the docking surface of the second tower (3); the flange surface where the third tower (4) and the second tower (3) are docked is basically located in the vertical direction through the crane; Controlling the crane to move the third tower (4) slowly and steadily to the docking surface of the second tower (3) and aligning the guide pin; Align the flange surfaces of the third tower (4) and the second tower (3), insert all high-strength bolts, and confirm that all bolts can be completely passed without nuts; Remove the bolts, move the crane, put the third tower (4) back to its original support position, and remove the crane; The docking flange holes of the third tower (4) of another group and the second tower (3) are pre-docking; and the pre-docking of the two groups of third towers (4) and the second tower (3) is completed.

3. The construction method for synchronously hoisting a double-ended wind turbine airfoil tower using bilateral cranes according to claim 1, characterized in that: After the step of pre-docking the third tower and the second tower, the method further includes a step of hoisting the first tower and the second tower assembly.

4. The construction method for synchronously hoisting a double-ended wind turbine airfoil tower using bilateral cranes according to claim 3, characterized in that: The steps of hoisting the first tower and the second tower assembly include: After confirming that the flange hole positions of the third tower (4) and the second tower (3) of the two groups are all correct, start hoisting the combined assembly of the first tower (2) and the second tower (3); The first tower (2) and the second tower (3) are assembled and lifted to the top of the tower connecting member (1) by a crane; Continue to lift the combined assembly of the first tower (2) and the second tower (3) so that the flange surface of the first tower (2) is parallel to the installation surface of the tower connector (1); The combined assembly of the first tower (2) and the second tower (3) is rotated along the axis, and the bolt holes of the end flange of the first tower (2) are aligned with the positioning pins on the tower connecting member (1); Control the crane to slowly move the combined assembly of the first tower (2) and the second tower (3), and align the bottom flange of the first tower (2) and the tower connecting member (1) along the positioning pins; Put on all 212 high-strength studs and high-strength nuts on the inside and outside to achieve the matching of the first tower (2) and the second tower (3) combined assembly and the tower connecting piece (1); The first tower (2) and the second tower (3) combined assembly on the other side is hoisted and mounted on the other side of the working tower connecting piece (1); The first tower (2) and the second tower (3) combined assembly are connected via an intermediate cable (6), and then the crane is removed.

5. The construction method for synchronously hoisting a double-ended wind turbine airfoil tower using bilateral cranes according to claim 3 is characterized in that: After the step of hoisting the first tower and the second tower assembly, the method further includes the step of splicing the cabin adapter and the third tower.

6. The construction method for synchronously hoisting a double-ended wind turbine airfoil tower using bilateral cranes according to claim 5, characterized in that: The step of splicing the nacelle adapter and the third tower includes: First, the platform inside the cabin adapter (5) is installed, and then the cabin adapter (5) and the third tower (4) are assembled. After being fastened with studs, the third tower (4) and the cabin adapter (5) are hoisted together. The left and right sides are carried out simultaneously.

7. The construction method for synchronously hoisting a double-ended wind turbine airfoil tower using bilateral cranes according to claim 5, characterized in that: After the step of splicing the nacelle adapter and the third tower, the method further includes the step of hoisting the third tower and the nacelle adapter to form an assembly.

8. The construction method for synchronously hoisting a double-ended wind turbine airfoil tower using bilateral cranes according to claim 7, characterized in that: The step of hoisting the third tower and the nacelle adapter assembly includes: When the third tower (4) and the cabin adapter (5) are assembled and hoisted, a double-machine hoisting method is adopted, with the left and right sides hoisting simultaneously; The third tower (4) and the cabin adapter (5) are assembled together, and the upwind inclined cables (7) and the downwind inclined cables (8) are lifted to the top of the corresponding second tower (3); The third tower (4) and the cabin adapter (5) are rotated along the axis, and the bolt holes of the middle flanges of the second tower (3) and the third tower (4) are aligned. The third tower (4) and the cabin adapter (5) are then moved by a crane, and the middle flange of the third tower (4) and the middle flange of the second tower (3) are aligned along the positioning pins. High-strength bolts, high-strength washers, and high-strength nuts are then put on to complete the splicing and installation.

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