Sectional type modularized assembled wind power concrete tower drum and construction method

Abstract

The invention relates to the technical field of wind power generation equipment, in particular to a split type modular assembly wind power concrete tower drum and a construction method, the tower drum comprises supporting legs and a tower drum body, and the tower drum body is erected at the bottom of the tower drum body through a connecting frame; the tower drum body comprises a plurality of concrete drum bodies which are sequentially connected end to end, end side skirt edges which are turned outwards are arranged on the outer portions of the upper end side and the lower end side of each concrete drum body, end side connecting holes are evenly formed in the end side skirt edges, and the adjacent concrete drum bodies are connected together through the end side connecting holes and fasteners. The method comprises the steps that the supporting legs are fixed on a ground foundation, and the concrete arc-shaped barrel pieces are annularly assembled into the concrete barrel; and the first section of concrete barrel is hoisted between the supporting legs, and the perpendicularity is adjusted. Transportation limitation is broken through through modular design, the construction efficiency is improved, a traditional overall pouring process is replaced by on-site splicing, the construction period is shortened, the method is particularly suitable for remote areas or projects short in construction period, the shear strength is improved, and the bending bearing capacity is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and in particular to a wind power concrete tower assembled in a fragmented modular manner and a construction method thereof. Background Art

[0002] As the core supporting structure of wind turbines, the performance of wind turbine towers directly impacts the operational stability and service life of the units. With the acceleration of global energy transition, the wind power industry is experiencing explosive growth. Data indicates that China's cumulative installed wind power capacity will reach 440 million kilowatts in 2023, an 18.9% year-on-year increase, and the market for wind turbine towers will expand accordingly.

[0003] Traditional wind turbine towers are typically monolithic steel or cast-in-place concrete structures. Large wind turbine towers often exceed 80 meters in height. Monolithic structures are limited by the dimensions of road and rail transport, requiring specialized vehicles or segmented transport, resulting in high transportation costs. Cast-in-place concrete towers require on-site formwork construction, pouring, and curing, resulting in a construction cycle that can take several months. Furthermore, they have stringent requirements for site flatness and climatic conditions, making them difficult to adapt to projects in complex terrain such as mountains and hills. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a wind power concrete tower with segmented modular assembly and a construction method, which realizes the purposes of efficient transportation, rapid construction and high-precision installation through modular design, double flange connection structure and assembly process.

[0005] The present invention provides a wind power concrete tower with segmented modular assembly, which is characterized by comprising legs and a tower body, wherein the tower body is connected to the bottom of the tower body through a connecting frame;

[0006] The tower body includes several concrete cylinders connected in sequence. The upper and lower end sides of the concrete cylinders are both provided with outward-folded end skirts. The end skirts are evenly provided with end connection holes. The adjacent concrete cylinders are connected together through the end connection holes and fasteners. The lower end of the concrete cylinder at the lowest end is closed, and the upper end of the concrete cylinder at the highest end is closed.

[0007] According to a preferred technical solution, the concrete cylinder comprises a plurality of concrete arc-shaped cylinder sheets, both sides of which are provided with outward-folded side skirts, and the side skirts are evenly provided with side connection holes, and adjacent concrete arc-shaped cylinder sheets are connected together through the side connection holes and fasteners.

[0008] According to a preferred technical solution, the connecting seams on the sides of the concrete arc-shaped cylinder sheets on adjacent concrete cylinders are arranged in a staggered manner.

[0009] According to a preferred technical solution, fixing holes are provided at the bottoms of the legs, and the legs are fixed to the ground through the fixing holes. Connecting frames are also connected between the legs, and the connecting frames connected between the legs and the tower body include a transverse connecting frame and an inclined connecting frame.

[0010] The construction method of a wind power concrete tower assembled in a fragmented modular manner is characterized by comprising the following steps:

[0011] S1. Fix the outriggers on the ground, adjust the verticality of the outriggers, and then fix the connecting brackets between the outriggers.

[0012] S2. The concrete curved cylinder is assembled into a concrete cylinder and connected by fasteners through the side connection holes of the side skirts;

[0013] S3. Hoist the first section of the concrete cylinder between the legs, adjust the verticality, and fix the horizontal connecting frame between the concrete cylinder and the legs;

[0014] S4 repeat step S2 to complete the upper concrete cylinder assembly, and connect the concrete cylinder end skirt end connection hole with the lower concrete cylinder;

[0015] S5. After the concrete cylinder is stacked to a certain height, the inclined connecting frame between the concrete cylinder and the legs is fixed;

[0016] S6 continues step S4, after all the concrete cylinders are assembled and connected, the joints are sealed;

[0017] S7. After all concrete cylinders are assembled, perform overall verticality calibration and implement final fixation.

[0018] According to a preferred technical solution, in step S7, when the tower body is tilted after assembly, a gasket is added at the connection between the concrete cylinders on the tilted side to adjust the tilt.

[0019] The preferred technical solution is that in step S2, a laser positioning system is used to assist in calibration when assembling the concrete arc-shaped cylinder segments. The laser positioning system includes a 360° rotating laser transmitter arranged on the base ring and a laser receiving target on the inner wall of the tower body. Fastener connection is performed only when the deviation of the laser points received by all targets is ≤1mm.

[0020] The preferred technical solution is that after the sealing treatment in step S6: the connection seam is subjected to ultrasonic non-destructive testing with a detection frequency of 20kHz-100kHz. When a defect with a seam width greater than 0.3mm is detected, epoxy resin mortar is used for pressure grouting repair, and the sealing treatment is performed again after the repair.

[0021] Technical effects and advantages of the present invention:

[0022] This invention overcomes transportation limitations and improves construction efficiency through modular design. Specifically, by breaking down the tower into a hierarchical modular structure consisting of a concrete cylinder and curved segments, the volume of each unit is significantly reduced, making it compatible with road and rail transport standards and addressing the challenges of transporting large wind turbine towers as a whole. On-site assembly replaces traditional monolithic casting, shortening the construction cycle and making it particularly suitable for projects in remote areas or on tight deadlines.

[0023] The double-flange connection structure of this invention features a double-layer flange structure with end and side skirts. Combined with standardized connection holes and fasteners, it enhances shear strength and bending resistance, meeting the long-term dynamic load requirements of wind turbine towers. The overlapping skirt structure creates a stepped joint, effectively preventing the penetration of rainwater and corrosive media. Combined with a sealing process, it extends the service life of the structure.

[0024] This system utilizes a 360° rotating laser emitter in conjunction with an inner wall target to achieve an assembly accuracy of ≤1mm, significantly reducing the risk of vertical deviation. A three-level control system encompassing initial vertical adjustment, dynamic monitoring of the stacking process, and final calibration ensures an overall verticality error of ≤0.1%, far exceeding industry standards.

[0025] The modular design of this invention allows for highly flexible adjustments, allowing the number of cylinders to be increased or decreased to accommodate tower requirements ranging from 50 to 200 meters. This makes it particularly suitable for complex terrains such as mountains and hills. Uniformly sized connection holes and fasteners enable component standardization, reducing on-site machining and lowering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0028] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0029] Figure 4 This is a schematic diagram of the matching structure of upper and lower adjacent concrete arc-shaped cylinders of the present invention;

[0030] For example: 1-support leg; 2-tower body; 3-connecting frame; 11-fixing hole; 21-concrete cylinder; 22-end skirt; 23-end connecting hole; 24-fastener; 25-side skirt; 26-side connecting hole; 211-concrete curved cylinder piece; 31-transverse connecting frame; 32-inclined connecting frame. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figures 1 to 4 As shown,

[0033] The wind power concrete tower is assembled in a fragmented modular manner, comprising a support leg 1 and a tower body 2, wherein the tower body 2 is connected to the bottom of the tower body 2 by a connecting frame 3;

[0034] The tower body 2 includes several concrete cylinders 21 connected in sequence. The upper and lower end sides of the concrete cylinder 21 are provided with outward-folded end skirts 22. The end skirts 22 are evenly provided with end connection holes 23. Adjacent concrete cylinders 21 are connected together through the end connection holes 23 and fasteners 24. The lower end of the concrete cylinder 21 at the lower end is closed, and the upper end of the concrete cylinder 21 at the upper end is closed.

[0035] The concrete cylinder 21 includes a plurality of concrete arc-shaped cylinder segments 211 , and outward-folded side skirts 25 are respectively provided on both sides of the concrete arc-shaped cylinder segments 211 . Side connection holes 26 are evenly provided on the side skirts 25 , and adjacent concrete arc-shaped cylinder segments 211 are connected together through the side connection holes 26 and fasteners 24 .

[0036] The connecting seams on the sides of the concrete arc-shaped cylinder segments 211 on adjacent concrete cylinders 21 are staggered.

[0037] A fixing hole 11 is provided at the bottom of the leg 1, and the leg 1 is fixed to the ground foundation through the fixing hole 11. A connecting frame 3 is also connected between the legs 1. The connecting frame 3 connected between the leg 1 and the tower body 2 includes a horizontal connecting frame 31 and an inclined connecting frame 32.

[0038] The construction method of a wind power concrete tower assembled in a fragmented modular manner includes the following steps:

[0039] S1. Fix the legs 1 on the ground, adjust the verticality of the legs 1, and fix the connecting frame 3 between the legs 1;

[0040] S2. The concrete curved cylinder 211 is assembled into a ring as a concrete cylinder 21, connected by fasteners 24 through the side connection holes 26 of the side skirt 25;

[0041] S3. The first section of the concrete cylinder 21 is hoisted between the legs 1, and after adjusting the verticality, the horizontal connecting frame 31 is fixed between the concrete cylinder 21 and the legs 1;

[0042] S4 repeat step S2 to complete the upper concrete cylinder 21 assembly, and through the concrete cylinder 21 end side skirt 22 end side connection hole 23 connected to the lower concrete cylinder;

[0043] S5. After the concrete cylinder is stacked to a certain height 21, the inclined connecting frame 32 is fixed between the concrete cylinder 21 and the legs 1;

[0044] S6 continues to step S4, after all the concrete cylinders 21 are assembled and connected, the joints are sealed;

[0045] S7. After all concrete cylinders 21 are assembled, the overall verticality is calibrated and final fixation is performed.

[0046] In step S7, when the tower body 2 is tilted after assembly, a gasket is added at the connection between the concrete cylinders 21 on the tilted side to adjust the tilt.

[0047] In step S2, a laser positioning system is used to assist in calibration when assembling the concrete arc-shaped cylinder segments 211. The laser positioning system includes a 360° rotating laser transmitter arranged on the foundation ring and a laser receiving target on the inner wall of the tower body 21. Fastener connection is performed only when the deviation of the laser points received by all targets is ≤1mm.

[0048] After the sealing treatment in step S6: ultrasonic non-destructive testing is performed on the connection seam with a detection frequency of 20kHz-100kHz. When a defect with a seam width greater than 0.3mm is detected, pressure grouting is performed using epoxy resin mortar for repair, and sealing treatment is performed again after repair.

[0049] The present invention decomposes the tower into multiple concrete cylinders 21, each of which is further assembled from concrete arc-shaped cylinder sheets 211 to form a segmented modular structure. The modular design reduces the volume of a single piece and adapts to transportation restrictions such as roads and railways; on-site assembly replaces integral casting to shorten the construction period; the modules can be adjusted in combination to control the height and adapt to complex terrain. Outward-folded end skirts 22 and side skirts 25 are set at the upper and lower ends and sides of the concrete cylinder 21, and are connected through end connection holes 23, side connection holes 26 and fasteners 24. The double skirts form a flange connection to improve shear and bending resistance; the overlapping skirt design reduces the penetration of rainwater and corrosive media; standardized connection holes and fasteners simplify the construction process. The construction method of the present invention adopts laser positioning to assist assembly, staged verticality calibration, and integrated connection seam sealing and detection processes. Ultrasonic non-destructive testing is performed on the connection seams, and defects are repaired by epoxy resin mortar pressure grouting.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The wind power concrete tower is assembled in a modular manner, characterized by: It comprises a support leg (1) and a tower body (2), wherein the tower body (2) is connected to the bottom of the tower body (2) via a connecting frame (3); The tower body (2) comprises a plurality of concrete cylinders (21) connected in sequence. The upper and lower end sides of the concrete cylinders (21) are both provided with outwardly folded end skirts (22). The end skirts (22) are evenly provided with end connection holes (23). Adjacent concrete cylinders (21) are connected together through the end connection holes (23) and fasteners (24). The lower end of the concrete cylinder (21) at the lower end is closed, and the upper end of the concrete cylinder (21) at the upper end is closed.

2. The wind power concrete tower with segmented modular assembly according to claim 1 is characterized in that: The concrete cylinder (21) includes a plurality of concrete arc-shaped cylinder sheets (211). Both sides of the concrete arc-shaped cylinder sheets (211) are respectively provided with outwardly folded side skirts (25). The side skirts (25) are evenly provided with side connection holes (26). Adjacent concrete arc-shaped cylinder sheets (211) are connected together through the side connection holes (26) and fasteners (24).

3. The wind power concrete tower with segmented modular assembly according to claim 2 is characterized by: The connecting seams on the side portions of the concrete arc-shaped cylinder sheets (211) on the adjacent concrete cylinders (21) are arranged in a staggered manner.

4. The wind power concrete tower with segmented modular assembly according to claim 1 is characterized in that: The bottom of the support leg (1) is provided with a fixing hole (11), and the support leg (1) is fixed to the ground foundation through the fixing hole (11). A connecting frame (3) is also connected between the support legs (1), and the connecting frame (3) connected between the support leg (1) and the tower body (2) includes a transverse connecting frame (31) and an inclined connecting frame (32).

5. The construction method of the wind power concrete tower with segmented modular assembly according to claim 4 is characterized in that: The following steps are included: S1. Fix the legs (1) on the ground, adjust the verticality of the legs (1), fix the legs (1), and fix the connecting frame (3) between the legs (1); S2. The concrete curved cylinder (211) is assembled into a ring-shaped concrete cylinder (21), connected by fasteners (24) through the side connection holes (26) of the side skirts (25); S3. The first section of the concrete cylinder (21) is hoisted between the legs (1), and after adjusting the verticality, the horizontal connecting frame (31) between the concrete cylinder (21) and the legs (1) is fixed; S4. Repeat step S2 to complete the assembly of the upper concrete cylinder (21), and connect the end-side connection hole (23) of the end skirt (22) of the concrete cylinder (21) to the lower concrete cylinder; S5. After the concrete cylinder is stacked (21) to a certain height, the inclined connecting frame (32) is fixed between the concrete cylinder (21) and the legs (1); S6 continues step S4, after all the concrete cylinders (21) are assembled and connected, the joints are sealed; S7. After all the concrete cylinders (21) are assembled, the overall verticality is calibrated and final fixing is performed.

6. The construction method of the wind power concrete tower with segmented modular assembly according to claim 5 is characterized by: In step S7, when the tower body (2) is tilted after assembly, a gasket is added to the connection between the concrete cylinders (21) on the tilted side to adjust the tilt.

7. The fragmented modular wind power concrete tower and construction method according to claim 5 are characterized by: In step S2, a laser positioning system is used to assist in calibration when assembling the concrete arc-shaped cylinder pieces (211). The laser positioning system includes a 360° rotating laser transmitter arranged on a foundation ring and a laser receiving target on the inner wall of the tower body (21). Fastener connection is performed only when the deviation of the laser points received by all targets is ≤1mm.

8. The construction method of the wind power concrete tower with segmented modular assembly according to claim 5 is characterized by: After the sealing treatment in step S6: ultrasonic non-destructive testing is performed on the connection seam with a detection frequency of 20kHz-100kHz. When a defect with a seam width greater than 0.3mm is detected, pressure grouting is performed using epoxy resin mortar for repair, and sealing treatment is performed again after repair.

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