Method for combining tower section of wind turbine with concrete foundation

Abstract

The application discloses a tower drum petal body combination method based on a fan concrete foundation, and comprises the following steps: three tower drum petals are assembled to form a tower drum whole in a vertical state by being moved close to each other. When the three tower drum petals are assembled to form a tower drum whole segment, the fan concrete foundation is used as a stress foundation, and the assembly process is judged to be in place and aligned according to the observation of the fan anchor rod, so that the tower drum petals are assembled to form the tower drum whole in the vertical state, the tower drum petals do not need to be assembled in a horizontal state, and the problem that a large construction site is occupied when the petals are assembled in the horizontal state is solved.

Description

Technical Field

[0001] This invention relates to a method for assembling tower segments based on a wind turbine concrete foundation, belonging to the technical field of onshore wind turbine tower installation and assembly. Background Technology

[0002] Onshore wind power is an important component of green energy. As of August 2025, the cumulative grid-connected capacity of wind power in China has reached 580 million kilowatts, accounting for about 11% of the total electricity consumption of the whole society, and has become an important force in power supply.

[0003] Sometimes, the tower of an onshore wind turbine needs to adopt a modular structure (see Chinese patent application publication number CN108843517A). The tower is composed of three petals. The three petals are transported to the turbine site for assembly. When the petals are assembled horizontally, the height of the petals is longer after being laid down, resulting in a large construction site space occupied when assembling the petals horizontally. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for assembling tower segments based on a wind turbine concrete foundation.

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

[0006] This invention provides a method for assembling tower segments based on a wind turbine concrete foundation, comprising: The process of assembling the three tower sections by having them stand upright and then converge towards each other to form the entire tower structure.

[0007] The assembly process includes two steps: hoisting the tower sections into place and assembling the tower sections.

[0008] The steps for hoisting the tower segments into place are as follows: Three sets of drive components are installed circumferentially at intervals on the wind turbine concrete foundation. The crane hoists the three tower segments onto the docking arc plates of the drive components. After the two docking bolts are connected and penetrated with the corresponding bolt holes of the tower segments, the fastening nuts are tightened to fix them. The three tower segments are supported and erected on the poured wind turbine concrete foundation by the drive components, with the three tower segments spaced apart from each other.

[0009] The drive assembly includes a docking arc plate, a pad, a slide rail, a slider, a hydraulic telescopic rod, docking bolt posts, and fastening nuts. The pad and the slide rail are fixed by pre-embedded bolts in the concrete foundation of the wind turbine. The slide rail is provided with a groove for the slider to be slidably installed. The slider is driven by the hydraulic telescopic rod. The docking arc plate is fixed on the slider, and the docking arc plate has docking bolt posts.

[0010] Before the tower segment hoisting into place, a site preparation step is also included.

[0011] The site preparation steps are as follows: a concrete foundation for the wind turbine is poured in the concave area of ​​the rock strata in the construction area, and multiple wind turbine anchor bolts are pre-embedded in the middle area of ​​the concrete foundation; a placement area is constructed on the side of the rock strata in the construction area through concrete pouring; and a construction frame is erected in the middle of the wind turbine anchor bolts.

[0012] The tower segment assembly steps are as follows: the hydraulic telescopic rod is driven to bring the three tower segments closer together. When the bolt holes of the tower segments without through-bolt columns are aligned with the wind turbine anchor rods embedded in the wind turbine concrete foundation, the hydraulic telescopic rod stops moving. The vertical contact surfaces of the three tower segments are fixed on the construction frame to complete the assembly of the entire tower segment. The fastening nuts are then released, and the entire tower is hoisted to the placement area by a crane.

[0013] The beneficial effects of this invention are as follows: when the three tower segments are assembled to form the overall tower segment, the wind turbine concrete foundation serves as the load-bearing foundation, and the alignment of the assembly process is judged by observing the wind turbine anchor bolts. This allows the tower segments to be assembled in a vertical state to form the overall tower, eliminating the need for the tower segments to be assembled in a horizontal manner. This solves the problem of the large amount of construction space occupied when assembling the segments horizontally. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the distribution structure of the tower as a whole, the placement area, the crane, and the concrete foundation of the wind turbine of this invention; Figure 2 This is a schematic diagram of the distribution structure of the construction frame, tower segments, and wind turbine concrete foundation of the present invention; Figure 3 This is a schematic diagram of the distribution structure of the pad block, slide rail, and wind turbine concrete foundation of the present invention; Figure 4 This is a schematic diagram of the structure of the driving component of the present invention; Figure 5 This is a schematic diagram of the structure of the three tower sections of the present invention when they are drawn closer to each other; Detailed Implementation

[0015] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0016] like Figures 1 to 5 As shown.

[0017] This application discloses a method for assembling tower segments based on a wind turbine concrete foundation, comprising the following steps.

[0018] Step 1: Site Preparation. A concrete foundation 4 for the wind turbine is poured in the recessed area of ​​the rock stratum 6 within the construction area. Multiple spaced wind turbine anchor bolts 41 are pre-embedded in the central area of ​​the concrete foundation 4. These anchor bolts 41 will be used for bolt holes that will later penetrate the entire tower 21. A placement area 61 is constructed on the side of the rock stratum 6 through concrete pouring to hold the assembled tower 21. A construction scaffold 5 is erected in the middle of the wind turbine anchor bolts 41 within the concrete foundation 4.

[0019] Step 2: Tower segments are hoisted into place. Three sets of drive components 3 are installed circumferentially on the wind turbine concrete foundation 4. The crane 1 uses the rock strata 6 in the construction area as the load-bearing element to hoist the three tower segments 2 onto the docking arc plate 31 of the drive components 3. After the two docking bolt columns 36 are connected and penetrated with the corresponding bolt holes of the tower segments 2, the fastening nuts 37 are tightened to fix them. The three tower segments 2 are supported by the drive components 3 and stand upright on the poured wind turbine concrete foundation 4, with the three tower segments 2 spaced apart from each other.

[0020] The driving component 3 includes a docking arc plate 31, a pad 32, a slide rail 33, a slider 34, a hydraulic telescopic rod 35, docking bolt posts 36, and a fastening nut 37. The pad 32 and the slide rail 33 are fixed by pre-embedded bolts 38 embedded in the wind turbine concrete foundation 4. The slide rail 33 is provided with a groove for the slider 34 to be slidably installed. The slider 34 is driven by the hydraulic telescopic rod 35. The docking arc plate 31 is fixed on the slider 34, and the docking arc plate 31 has docking bolt posts 36. After the two docking bolt posts 36 are connected and penetrated with the bolt holes corresponding to the tower segment 2, the fastening nut 37 is tightened to fix them. At this time, the other bolt holes of the tower segment 2 are aligned above the wind turbine anchor rod 41 but not penetrated, which makes it easy to observe whether the bolt holes of the tower segment 2 are aligned with the wind turbine anchor rod 41 embedded in the wind turbine concrete foundation 4.

[0021] Step 3: Assemble the tower sections. The hydraulic telescopic rod 35 is driven to bring the three tower sections 2 closer together. When the bolt holes of the tower section 2 without through bolts 36 are aligned with the wind turbine anchor rods 41 embedded in the wind turbine concrete foundation 4, the hydraulic telescopic rod 35 stops moving. The vertical contact surfaces of the three tower sections 2 are then fixed on the construction frame 5, completing the assembly of the entire tower section 21. The fastening nuts 37 are released, and the entire tower section 21 is lifted to the placement area 61 by the crane 1. The telescopic rod 35 retracts, and steps 2 and 3 are repeated until all the entire tower sections 21 are assembled.

[0022] When the three tower segments 2 are assembled into the overall tower segment 21, they rely on the wind turbine concrete foundation 4 as the load-bearing foundation. The alignment during assembly is determined by observing the wind turbine anchor bolts 41, allowing the tower segments 2 to be assembled vertically to form the overall tower segment 21. This eliminates the need for a horizontal assembly method, solving the problem of the large space required for horizontal assembly. The three tower segments 2 are situated on the recessed wind turbine concrete foundation 4, allowing the crane 1 to obtain some height compensation from the rock strata 6 in the construction area, facilitating the hoisting of the tower segments 2 and the overall tower segment 21.

[0023] After all the tower sections 21 are assembled by the tower sections 2, the drive assembly 3 and the construction frame 5 are disassembled. Then, the tower sections 21 are hoisted and connected to the wind turbine anchor bolts 41 of the wind turbine concrete foundation 4, and then the tower sections 21 are hoisted and connected to each other.

Claims

1. A method for assembling tower segments based on a wind turbine concrete foundation, characterized in that, include: The three tower sections (2) are assembled by moving inwards towards each other in an upright position to form the whole tower (21).

2. The tower segment assembly method based on wind turbine concrete foundation as described in claim 1, characterized in that: The assembly process includes two steps: hoisting the tower sections into place and assembling the tower sections.

3. The method for assembling tower segments based on a wind turbine concrete foundation as described in claim 2, characterized in that, The steps for hoisting the tower segments into place are as follows: Three sets of drive components (3) are installed circumferentially on the wind turbine concrete foundation (4). The crane (1) hoists the three tower segments (2) onto the docking arc plate (31) of the drive component (3). After the two docking bolt columns (36) are connected and penetrated with the corresponding bolt holes of the tower segments (2), the fastening nuts (37) are tightened and fixed. The three tower segments (2) are supported by the drive components (3) and stand upright on the poured wind turbine concrete foundation (4). The three tower segments (2) are spaced apart from each other.

4. The method for assembling tower segments based on a wind turbine concrete foundation as described in claim 3, characterized in that, The drive assembly (3) includes a docking arc plate (31), a pad (32), a slide rail (33), a slider (34), a hydraulic telescopic rod (35), docking bolt posts (36), and a fastening nut (37). The pad (32) and the slide rail (33) are fixed by pre-embedded bolts (38) embedded in the concrete foundation (4) of the wind turbine. The slide rail (33) is provided with a sliding groove for the slider (34) to be slidably installed. The slider (34) is driven by the hydraulic telescopic rod (35). The docking arc plate (31) is fixed on the slider (34), and the docking arc plate (31) has docking bolt posts (36).

5. The tower segment assembly method based on wind turbine concrete foundation as described in claim 2, characterized in that: Before the tower section is hoisted into place, a site preparation step is also included.

6. The method for assembling tower segments based on a wind turbine concrete foundation as described in claim 5, characterized in that, The site preparation steps are as follows: a wind turbine concrete foundation (4) is poured in the recessed area of ​​the rock stratum (6) in the construction area, and multiple wind turbine anchor rods (41) are pre-embedded in the middle area of ​​the wind turbine concrete foundation (4); a placement area (61) is poured with concrete on the side of the rock stratum (6) in the construction area; and a construction frame (5) is erected in the middle of the wind turbine anchor rods (41).

7. The method for assembling tower segments based on a wind turbine concrete foundation as described in claim 4, characterized in that, The tower segment assembly steps are as follows: the hydraulic telescopic rod (35) is driven to make the three tower segments (2) retract and approach each other. When the bolt holes of the tower segments (2) without through bolt columns (36) are aligned with the wind turbine anchor rods (41) pre-embedded in the wind turbine concrete foundation (4), the hydraulic telescopic rod (35) stops moving. The vertical contact surfaces of the three tower segments (2) are fixed on the construction frame (5) to complete the assembly of the tower whole (21) segment. The fastening nuts (37) are released, and the tower whole (21) is hoisted to the placement area (61) by the crane (1).

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