A construction method for synchronously hoisting a double-head fan airfoil tower by using a double-sided crane

Abstract

The application discloses a construction method for synchronously hoisting double-head fan airfoil towers by adopting double-side cranes, and comprises the following steps: pre-docking two groups of third towers with second towers through flange hole positions, pre-docking the third towers with the second towers before installing a nacelle adapter and a third tower assembly, and then docking the nacelle adapter and the third tower assembly with a first tower and a second tower assembly in subsequent construction, so that the situation that the docking cannot be guaranteed after hoisting to a high altitude and the nacelle adapter and the third tower assembly need to be lowered and hoisted again is avoided, the problem that the docking cannot be guaranteed after hoisting to a high altitude and the nacelle adapter and the third tower assembly need to be lowered and hoisted again in the prior art is solved, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to a construction method for synchronously hoisting a double-head wind turbine airfoil tower by using double-side cranes, and belongs to the technical field of offshore wind turbine hoisting. BACKGROUND

[0002] In offshore wind power development, two independent main machines share a tower to form a double-head wind turbine. When hoisting and constructing the double-head wind turbine, the safety of the construction needs to be ensured.

[0003] The existing double-head hoisting technology, as disclosed in Chinese Patent Publication No. CN218595982U, discloses simultaneously hoisting a tower on both sides of an airfoil tower, and the tower is composed of multiple sections. For the third tower of the machine cabin adapter, when directly hoisted to a high altitude, it cannot be ensured that the second tower can be connected, so it needs to be lowered and then hoisted, which reduces the construction efficiency. SUMMARY

[0004] To solve the above technical problems, the application provides a construction method for synchronously hoisting a double-head wind turbine airfoil tower by using double-side cranes.

[0005] The application is implemented by the following technical solutions.

[0006] The application provides a construction method for synchronously hoisting a double-head wind turbine airfoil tower by using double-side cranes, which comprises the following steps:

[0007] Through the third tower and the second tower pre-connection step, the flange hole positions of the two groups of third towers and the second tower are pre-connected.

[0008] The third tower and the second tower pre-connection step comprises the following steps:

[0009] The third tower is connected with the crane, and a guide pin is installed at the diagonal position on the second tower connection surface. The flange surface of the third tower and the second tower is basically located in the vertical direction through the crane;

[0010] The third tower is slowly and smoothly moved to the connection surface position of the second tower by controlling the crane, and the guide pin is aligned;

[0011] The flange surfaces of the third tower and the second tower are aligned, all high-strength bolts are passed, and it is confirmed that all the bolts can be completely passed without nuts;

[0012] The bolts are removed, the crane is moved, the third tower is returned to the original support, and the crane is removed;

[0013] The connection flange hole positions of another group of third towers and the second tower are pre-connected according to the above steps; and the pre-connection of the two groups of third towers and the second tower is completed.

[0014] After the step of pre-docking the third tower and the second tower, the method further includes the step of hoisting the first tower and the second tower assembly.

[0015] The steps of hoisting the first tower and the second tower assembly include:

[0016] 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;

[0017] Lift the combined assembly of the first tower and the second tower to above the tower connecting piece using a crane;

[0018] 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;

[0019] 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;

[0020] 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;

[0021] Put on all 212 high-strength studs and high-strength nuts on the inside and outside to realize the assembly of the first tower and the second tower and the tower connector;

[0022] 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;

[0023] The first tower and the second tower assembly are connected by an intermediate cable, and then the crane is removed.

[0024] 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.

[0025] The step of splicing the nacelle adapter and the third tower includes:

[0026] 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.

[0027] 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.

[0028] The step of hoisting the third tower and the nacelle adapter assembly includes:

[0029] 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;

[0030] 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;

[0031] 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.

[0032] 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

[0033] Figure 1 This is a distribution structure diagram of the tower connection member, the first tower, and the second tower of the present invention;

[0034] 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;

[0035] Figure 3 This invention Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0036] Figure 4 This is a distribution structure diagram of two sets of third towers and cabin adapters during hoisting of the present invention;

[0037] Figure 5 This is a structural distribution diagram of the third tower and the nacelle adapter when assembled according to the present invention;

[0038] 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

[0039] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0040] See also Figures 1 to 5 shown.

[0041] The application discloses a construction method for synchronously hoisting double-head fan airfoil towers by using double-side cranes.

[0042] S1 hoisting construction preparation

[0043] 1. Check whether the flange of the foundation section has defects such as coating damage, rust, convex points and the like, and clean the sundries in the foundation; remove burrs, convex points on the flange surface by using a flat file, and clean the oil stains and sundries on the flange surface by using a cleaning agent.

[0044] 2. Check the bolts and other materials to confirm that they are not damaged, deformed, and have intact threads.

[0045] 3. Confirm that the foundation bearing capacity of the fan hoisting platform meets the hoisting requirements.

[0046] 4. Confirm that the specifications, quantities and qualities of the mechanical equipment, lifting appliances, tools and materials meet the hoisting requirements.

[0047] 5. Grounding resistance report, CCS and maritime bureau certification report and other related unit certification reports.

[0048] 6. Check the fastness of the floating body berthing cable to meet the hoisting requirements.

[0049] 7. The floating body stability meets the requirements (reflected by the floating body inclination test results).

[0050] 8. Check the sea wave condition on site to ensure that the foundation floating body does not appear large fluctuations under the condition.

[0051] S2 pre-docking of the third tower and the second tower

[0052] The third tower 4 is connected with the crane, and guide pins are installed at diagonal positions on the docking surface of the second tower 3; the flange surfaces of the third tower 4 and the second tower 3 are basically located in the vertical direction (angle deviation is about ±2°) through the crane.

[0053] The crane is controlled to slowly and stably move the third tower 4 to the docking surface position of the second tower 3, and the guide pins are aligned.

[0054] The flange surfaces of the third tower 4 and the second tower 3 are aligned, all high-strength bolts M56*265 are passed, and it is confirmed that all the bolts can be completely passed without nuts.

[0055] The bolts are removed, the crane is moved, the third tower 4 is placed back to the original support, and the crane is removed.

[0056] The docking flange hole positions of another set of third tower 4 and second tower 3 are pre-docked according to the above steps; and the pre-docking of two sets of third tower 4 and second tower 3 is completed.

[0057] S3 hoisting of the first tower and the second tower assembly

[0058] After confirming that the flange hole positions of the third tower 4 and the second tower 3 of the two groups are all correct, the first tower 2 and the second tower 3 combined assembly is hoisted.

[0059] The first tower 2 and the second tower 3 combined assembly is lifted to the top of the tower connecting piece 1 by the crane;

[0060] The first tower 2 and the second tower 3 combined assembly is continuously lifted, so that the flange surface of the first tower 2 is parallel to the installation surface of the tower connecting piece 1, as shown in Figure 1 .

[0061] The first tower 2 and the second tower 3 combined assembly is rotated along the axis, so that the bolt hole of the flange at the end of the first tower 2 is aligned with the positioning pin on the tower connecting piece 1.

[0062] The crane is controlled to slowly move the first tower 2 and the second tower 3 combined assembly along the positioning pin, so that the bottom flange of the first tower 2 is attached to the tower connecting piece 1.

[0063] All 212 high-strength studs and high-strength nuts on the inside and outside are installed, so that the first tower 2 and the second tower 3 combined assembly is connected to the tower connecting piece 1.

[0064] According to the above steps, the first tower 2 and the second tower 3 combined assembly on the other side is hoisted and connected to the other side of the working tower connecting piece 1.

[0065] The first tower 2 and the second tower 3 combined assembly is connected by the intermediate cable 6, and then the crane is removed.

[0066] Before the nacelle adapter 5 and the third tower 4 combined assembly is installed, the third tower 4 is first connected to the flange hole position of the second tower 3 for pre-connection, and then the nacelle adapter 5 and the third tower 4 combined assembly is connected to the first tower 2 and the second tower 3 combined assembly during the subsequent construction, so that the situation that the connection cannot be guaranteed after hoisting to a high altitude and then lowering and hoisting again is avoided, and the problem of low construction efficiency in the prior art is solved.

[0067] S4 nacelle adapter and third tower splicing

[0068] The platform inside the nacelle adapter 5 is installed first, and then the nacelle adapter 5 and the third tower 4 are spliced, and the third tower 4 and the nacelle adapter 5 combined assembly are hoisted together after being fastened by double-headed studs, and the left and right sides are performed simultaneously, as shown in Figure 5 .

[0069] S5 hoisting the third tower and nacelle adapter assembly

[0070] The third tower 4 and the nacelle adapter 5 combined assembly is hoisted to the corresponding second tower 3 by using the double-machine lifting method.

[0071] The third tower 4 and the nacelle adapter 5 combined assembly, and the upwind cable-stayed cable 7 and the downwind cable-stayed cable 8 are hoisted to the corresponding second tower 3. Figure 4 As shown in the figure.

[0072] The third tower 4 and the nacelle adapter 5 combined assembly is rotated along the axis, the bolt holes of the middle flanges of the second tower 3 and the third tower 4 are aligned, and then the third tower 4 and the nacelle adapter 5 combined assembly is moved by the crane, the middle flanges of the third tower 4 and the second tower 3 are aligned along the positioning pin, and the high-strength bolt, the high-strength washer, and the high-strength nut are used to complete the splicing and installation.

[0073] S6 installation is completed

[0074] After the ground cable is connected to the tower formed by 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, and finally completely unloaded, and the two sides are simultaneously performed, and the installation is completed.

Claims

1. A construction method for hoisting a double-head wind turbine tower in synchronization by using a double-sided crane, characterized in that, The method comprises the following steps: The third tower and the second tower are pre-connected through the third tower and the second tower pre-connection step; The third tower and the second tower pre-connection step comprises the following steps: The third tower (4) is connected with the crane, and the guide pin is arranged on the diagonal position of the connecting surface of the second tower (3); the flange surface of the third tower (4) and the second tower (3) is located in the vertical direction through the crane; The crane is controlled to slowly and smoothly move the third tower (4) to the connecting surface position of the second tower (3), and the guide pin is aligned; The flange surfaces of the third tower (4) and the second tower (3) are aligned, all high-strength bolts are passed, and it is confirmed that all the bolts can be completely passed without nuts; The bolts are removed, the crane is moved, the third tower (4) is placed back to the original supporting position, and the crane is removed; The flange surface of the third tower (4) and the second tower (3) is pre-connected, and the pre-connection of the two groups of third towers (4) and the second tower (3) is completed. After the third tower and the second tower pre-connection step, the first tower and the second tower assembly hoisting step is further included; The first tower and the second tower assembly hoisting step comprises the following steps: After it is confirmed that the flange surface positions of the two groups of third towers (4) and the second tower (3) are all correct, the first tower (2) and the second tower (3) combined assembly is hoisted; The first tower (2) and the second tower (3) combined assembly is lifted to the upper side of the tower connecting piece (1) through the crane; The first tower (2) and the second tower (3) combined assembly is continuously lifted, so that the flange surface of the first tower (2) is parallel to the mounting surface of the tower connecting piece (1); The first tower (2) and the second tower (3) combined assembly is rotated along the axis, so that the bolt hole of the flange of the first tower (2) is aligned with the positioning pin on the tower connecting piece (1); The crane is controlled to slowly move the first tower (2) and the second tower (3) combined assembly along the positioning pin, so that the flange of the first tower (2) and the tower connecting piece (1) are attached. All 212 high-strength bolts and high-strength nuts on the inner and outer sides are passed, and the first tower (2) and the second tower (3) combined assembly and the tower connecting piece (1) are connected. The first tower (2) and the second tower (3) combined assembly on the other side is hoisted, and the other side of the working tower connecting piece (1) is connected. The first tower (2) and the second tower (3) combined assembly is connected through the intermediate cable (6), and then the crane is removed. After the first tower and the second tower assembly hoisting step, the nacelle adapter and the third tower splicing step is further included. After the nacelle adapter and the third tower splicing step, the hoisting third tower and nacelle adapter assembly step is further included.

2. The method for construction of double-headed wind turbine tower with airfoil section by using double-sided cranes for synchronized hoisting as claimed in claim 1, wherein, The nacelle adapter and the third tower splicing step comprises the following steps: The platform inside the nacelle adapter (5) is installed first, then the nacelle adapter (5) and the third tower (4) are spliced, and the third tower (4) and the nacelle adapter (5) combined assembly are hoisted together after being fastened by double-headed bolts, and the left and right sides are simultaneously performed.

3. The method of claim 1, wherein the method is characterized by: The hoisting third tower and nacelle adapter assembly step comprises the following steps: When hoisting the third tower (4) and the nacelle adapter (5) combined assembly, double-machine lifting is adopted, and the left and right sides are lifted simultaneously; The third tower (4) and the nacelle adapter (5) combined assembly, and the upwind cable-stayed cable (7) and the downwind cable-stayed cable (8) are lifted to the corresponding second tower (3) above; The third tower (4) and the nacelle adapter (5) combined assembly are rotated along the axis, the bolt holes of the middle flanges of the second tower (3) and the third tower (4) are aligned, then the third tower (4) and the nacelle adapter (5) combined assembly are moved by the crane, the middle flanges of the third tower (4) and the second tower (3) are aligned along the positioning pin, and the high-strength bolt, the high-strength washer and the high-strength nut are threaded to complete the splicing and installation.

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