Wind power combined tower structure and construction method thereof

Abstract

The present application relates to the technical field of wind power tower and discloses a wind power combined tower structure and a construction method thereof, which comprises a truss tower component, a concrete tower component, a tower column component and a steel tower component, the truss tower component is a hollow structure with an open top, and the truss tower component is used to be connected with the ground; the concrete tower component is arranged on the upper side of the truss tower component, the bottom of the concrete tower component extends into the truss tower component from the top opening of the truss tower component, and the concrete tower component is connected with the truss tower component; the tower column component is arranged in the truss tower component, the tower column component is located on the lower side of the concrete tower component, and the tower column component is used to support the concrete tower component; the steel tower component is arranged on the concrete tower component, and the steel tower component is used to install wind power equipment; through the cooperation of the truss tower component, the concrete tower component, the tower column component and the steel tower component, the engineering economy and the bearing capacity of the tower body structure are improved.

Description

Technical Field

[0001] This invention belongs to the field of wind power tower technology, specifically relating to a wind power combined tower structure and its construction method. Background Technology

[0002] As the core supporting structure of wind turbines, the structural form of onshore wind turbine towers directly affects the load-bearing capacity, construction convenience, and engineering economy of wind turbines. Existing onshore wind turbine tower structures still have significant technical defects and application pain points in engineering applications: pure truss towers or truss tower-steel tower composite structures use a large amount of steel, resulting in high overall project costs, and the operation of such structures is difficult for high-altitude hoisting and on-site installation; although traditional concrete tower structures are more economical, they rely solely on vertically arranged prestressed steel strands to achieve stress balance, and the overall connection with other steel tower bodies is insufficient. If a simple combination of concrete towers and steel towers is adopted, it is still difficult to balance the high load-bearing capacity and construction convenience of the structure.

[0003] Therefore, developing a combined onshore wind power tower structure and supporting construction methods that can integrate the technological advantages of truss towers, hybrid towers, and steel towers, achieve reliable connection and coordinated stress distribution among various structural sections, and is convenient and economical to construct, has become an urgent technical problem to be solved in the field of onshore wind power tower technology. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a wind power combined tower structure that utilizes a combination of truss towers, hybrid towers, and steel towers, achieving both high load-bearing capacity and economic efficiency.

[0005] The wind turbine combined tower structure of this invention includes a truss tower assembly, a concrete tower assembly, a tower column assembly, and a steel tower assembly. The truss tower assembly is a hollow structure with an open top and is used to connect to the ground. The concrete tower assembly is disposed on the upper side of the truss tower assembly, and its bottom extends from the top opening of the truss tower assembly into the truss tower assembly, and the concrete tower assembly is connected to the truss tower assembly. The tower column assembly is disposed in the truss tower assembly, located on the lower side of the concrete tower assembly, and is used to support the concrete tower assembly. The steel tower assembly is disposed on the concrete tower assembly and is used to install wind turbine equipment.

[0006] The wind turbine combined tower structure in this embodiment provides built-in installation space for the concrete tower assembly and tower column assembly through the arrangement of the truss tower assembly. The bottom of the concrete tower assembly extends into and connects to the truss tower assembly, optimizing the load transfer path and improving the overall load-bearing capacity and structural stability of the tower. The tower column assembly provides vertical support to the concrete tower assembly, effectively distributing the vertical load of the concrete tower assembly, reducing stress concentration at the connection points between the concrete tower assembly and the truss tower assembly, and improving the structural stress rationality. The steel tower assembly, separately installed on top of the concrete tower assembly, is used to install wind turbine equipment, adapting to the installation and connection requirements of the wind turbine equipment. Simultaneously, the structural characteristics of the concrete tower assembly buffer the vibrations generated by the wind turbine equipment, reducing the adverse effects of vibration on the equipment and tower structure. Through the coordinated operation of the truss tower assembly, concrete tower assembly, tower column assembly, and steel tower assembly, the structural advantages of each component are integrated, and the stress on each component is rationally distributed. While ensuring the overall load-bearing capacity of the tower, the material usage of individual components is reduced, construction difficulty is lowered, and the engineering economy and load-bearing capacity of the tower structure are improved.

[0007] In some embodiments, the horizontal cross-section of the truss tower assembly is square, the vertical cross-section of the truss tower assembly is an isosceles trapezoid, and the truss tower assembly includes a lower frame, a middle frame, and an upper frame from bottom to top. The lower frame and the upper frame are X-type node trusses, and the middle frame is a K-type node truss.

[0008] In some embodiments, the truss tower assembly further includes a mounting element comprising a mounting ring and a plurality of connecting flanges. The mounting ring is disposed on the ground, and the plurality of connecting flanges are spaced apart circumferentially at the bottom end of the lower frame, the connecting flanges being connected to the mounting ring.

[0009] In some embodiments, the concrete tower assembly includes a tower body, a base, and a top seat. The diameter of the tower body gradually decreases from bottom to top. The tower body is a hollow structure and a segmented tube structure. The base is disposed at the bottom of the tower body and is located in the truss tower assembly. The diameter of the base is larger than the diameter of the tower body and is used to connect with the truss tower assembly. The diameter of the top seat is larger than the diameter of the top of the tower body and is used to connect with the steel tower assembly.

[0010] In some embodiments, the tower column assembly includes a connecting plate and a plurality of segmented columns. The connecting plate is disposed on the lower side of the concrete tower assembly, and the plurality of segmented columns are connected sequentially from bottom to top. The top segmented column is connected to the connecting plate, and the bottom segmented column is connected to the ground.

[0011] In some embodiments, the wind power combined tower structure further includes a connecting assembly, which includes a plurality of upper connectors. The plurality of upper connectors are spaced apart along the circumferential direction on the upper side of the base. The plurality of upper connectors are evenly arranged along the circumferential direction. Each upper connector includes a plurality of first connecting rods and a plurality of first flanges. The plurality of first connecting rods extend outward and connect to the top of the upper frame. The plurality of first flanges are spaced apart along the circumferential direction on the base. The plurality of first flanges correspond one-to-one with the plurality of first connecting rods, and the first connecting rods are connected to the first flanges.

[0012] In some embodiments, the connecting assembly further includes a plurality of lower connectors, which are spaced apart along the circumferential direction on the lower side of the base. The plurality of lower connectors are evenly arranged along the circumferential direction. Each lower connector includes a plurality of second connecting rods and a plurality of second flanges. The plurality of second connecting rods extend outward and connect to the bottom end of the upper frame. The plurality of second flanges are spaced apart along the circumferential direction on the base. Each of the plurality of second flanges corresponds to one of the plurality of second connecting rods, and the second connecting rods are connected to the second flanges.

[0013] In some embodiments, the connecting assembly further includes a plurality of connecting anchors that penetrate the base vertically, with the top end of the connecting anchor connected to the first flange and the bottom end of the connecting anchor connected to the second flange, the connecting anchors being used to connect the first flange and the second flange in the same vertical direction.

[0014] In some embodiments, the wind power combined tower structure further includes a steel strand assembly, which includes multiple steel strands and multiple guide wheels. The multiple steel strands are connected to the bottom end of the steel tower assembly in a circumferential direction. The steel strands extend downward through the top seat and the base. The guide wheels are rotatably disposed on the underside of the base. The multiple guide wheels correspond one-to-one with the multiple steel strands. After being guided by the guide wheels, the steel strands are connected to the bottom end of the lower frame.

[0015] In some embodiments, the mounting component further includes a stranded wire mounting ring and a plurality of mounting holes. The stranded wire mounting ring is disposed inside the mounting ring, and the plurality of mounting holes are formed on the stranded wire mounting ring in a circumferential direction. The plurality of mounting holes correspond one-to-one with a plurality of steel strands, and the steel strands are connected to the mounting holes.

[0016] The wind turbine combined tower construction method of this invention, utilizing the wind turbine combined tower structure of any of the above embodiments, includes the following steps:

[0017] Truss tower installation: The truss tower assembly is installed on the ground foundation and fixed. The truss tower assembly is a hollow structure with an open top. Steel tower hoisting: The steel tower assembly is hoisted into the hollow interior of the truss tower assembly. A limiting structure is set at the top of the truss tower assembly, and the steel tower assembly is lifted upward to a certain height by a ground lifting device. Concrete tower installation: The top of the concrete tower assembly is connected to the bottom of the steel tower assembly inside the truss tower assembly and on the lower side of the steel tower assembly. The concrete tower assembly segments are cyclically lifted by the ground lifting device using a self-lifting method. The segments of the concrete tower assembly are then assembled sequentially below until the concrete tower assembly is installed. Tower column installation: The concrete tower assembly is lifted to a certain height, and tower column segments are installed at the bottom of the concrete tower assembly. The tower column segments are lifted in a cyclical manner using a ground lifting device, and then assembled sequentially from below until the tower column assembly is installed. Connection and anchoring: Connecting and fixing the truss tower to the concrete tower.

[0018] The wind turbine combined tower structure in this embodiment provides built-in installation space for the concrete tower assembly and tower column assembly through the arrangement of the truss tower assembly. The bottom of the concrete tower assembly extends into and connects to the truss tower assembly, optimizing the load transfer path and improving the overall load-bearing capacity and structural stability of the tower. The tower column assembly provides vertical support to the concrete tower assembly, effectively distributing the vertical load of the concrete tower assembly, reducing stress concentration at the connection points between the concrete tower assembly and the truss tower assembly, and improving the structural stress rationality. The steel tower assembly, separately installed on top of the concrete tower assembly, is used to install wind turbine equipment, adapting to the installation and connection requirements of the wind turbine equipment. Simultaneously, the structural characteristics of the concrete tower assembly buffer the vibrations generated by the wind turbine equipment, reducing the adverse effects of vibration on the equipment and tower structure. Through the coordinated operation of the truss tower assembly, concrete tower assembly, tower column assembly, and steel tower assembly, the structural advantages of each component are integrated, and the stress on each component is rationally distributed. While ensuring the overall load-bearing capacity of the tower, the material usage of individual components is reduced, construction difficulty is lowered, and the engineering economy and load-bearing capacity of the tower structure are improved. Attached Figure Description

[0019] Figure 1 This is an overall schematic diagram of the present invention.

[0020] Figure 2 This is a partial structural schematic diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the mounting component in this invention.

[0022] Figure 4 This is the present invention. Figure 2 Sectional view at point AA.

[0023] Figure 5 This is the present invention. Figure 2 Sectional view at point BB.

[0024] Figure 6 This is a schematic diagram of the distribution of the first flange in this invention.

[0025] Figure 7 This is a partial structural diagram of the connecting component in this invention.

[0026] Figure 8 This is a schematic diagram of the installation structure of the guide wheel in this invention.

[0027] Figure 9 This is a schematic diagram of the installation state of the present invention.

[0028] Figure label: 1. Truss tower assembly; 11. Lower frame; 12. Middle frame; 13. Upper frame; 14. Mounting components; 141. Mounting ring; 142. Connecting flange; 143. Stranded wire mounting ring; 144. Mounting hole; 2. Concrete tower components; 21. Tower body; 22. Base; 23. Top seat; 3. Tower column assembly; 31. Connecting plate; 32. Segmented column; 4. Steel tower components; 5. Wind power equipment; 6. Connecting assembly; 61. Upper connector; 611. First connecting rod; 612. First flange; 62. Lower connector; 621. Second connecting rod; 622. Second flange; 63. Connecting anchor bolt; 7. Steel strand assembly; 71. Steel strand; 72. Guide wheel. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] like Figures 1-9 As shown, the wind power combined tower structure of this embodiment includes a truss tower assembly 1, a concrete tower assembly 2, a tower column assembly 3, and a steel tower assembly 4. The truss tower assembly 1 is a hollow structure with an open top and is used to connect to the ground. The concrete tower assembly 2 is disposed on the upper side of the truss tower assembly 1, and the bottom of the concrete tower assembly 2 extends from the top opening of the truss tower assembly 1 into the truss tower assembly 1, and the concrete tower assembly 2 is connected to the truss tower assembly 1. The tower column assembly 3 is disposed in the truss tower assembly 1, and the tower column assembly 3 is located on the lower side of the concrete tower assembly 2, and the tower column assembly 3 is used to support the concrete tower assembly 2. The steel tower assembly 4 is disposed on the concrete tower assembly 2 and is used to install wind power equipment 5.

[0031] The wind turbine combined tower structure in this embodiment provides built-in installation space for the concrete tower assembly and tower column assembly through the arrangement of the truss tower assembly. The bottom of the concrete tower assembly extends into and connects to the truss tower assembly, optimizing the load transfer path and improving the overall load-bearing capacity and structural stability of the tower. The tower column assembly provides vertical support to the concrete tower assembly, effectively distributing the vertical load of the concrete tower assembly, reducing stress concentration at the connection points between the concrete tower assembly and the truss tower assembly, and improving the structural stress rationality. The steel tower assembly, separately installed on top of the concrete tower assembly, is used to install wind turbine equipment, adapting to the installation and connection requirements of the wind turbine equipment. Simultaneously, the structural characteristics of the concrete tower assembly buffer the vibrations generated by the wind turbine equipment, reducing the adverse effects of vibration on the equipment and tower structure. Through the coordinated operation of the truss tower assembly, concrete tower assembly, tower column assembly, and steel tower assembly, the structural advantages of each component are integrated, and the stress on each component is rationally distributed. While ensuring the overall load-bearing capacity of the tower, the material usage of individual components is reduced, construction difficulty is lowered, and the engineering economy and load-bearing capacity of the tower structure are improved.

[0032] Specifically, the truss tower assembly 1 is connected to the ground foundation, serving as the foundational load-bearing and lateral resistance structure of the entire wind turbine tower. Its open-top hollow structure provides installation space for the concrete tower assembly 2 and the tower column assembly 3. The steel tower assembly 4 is located on top of the concrete tower assembly 2, directly bearing the self-weight of the wind turbine 5 and the wind load and vibration load generated during equipment operation, and transferring these loads to the concrete tower assembly 2. The bottom of the concrete tower assembly 2 extends from the top opening of the truss tower assembly 1 into its interior and connects to the truss tower assembly 1, further transferring its own load and the load transferred by the steel tower assembly 4 to the truss tower assembly 1. The tower column assembly 3 is located inside the truss tower assembly 1 and below the concrete tower assembly 2, forming a vertical support for the concrete tower assembly 2, directly sharing the vertical load transferred by the concrete tower assembly 2, and jointly bearing the upper load of the concrete tower assembly 2 with the truss tower assembly 1.

[0033] In some embodiments, the horizontal cross-section of the truss tower assembly 1 is square, the vertical cross-section of the truss tower assembly 1 is an isosceles trapezoid, and the truss tower assembly 1 includes a lower frame 11, a middle frame 12 and an upper frame 13 from bottom to top. The lower frame 11 and the upper frame 13 are X-type node trusses, and the middle frame 12 is a K-type node truss.

[0034] The wind turbine combined tower structure in this embodiment improves the spatial compatibility between the truss tower assembly and the internal concrete tower assembly and tower column assembly by setting a square horizontal cross section. At the same time, the strong load-bearing nodes at the square corners enhance the overall lateral and torsional resistance of the truss tower assembly. The isosceles trapezoidal vertical cross section adapts to the gradually decreasing load law of the upper part of the tower, realizes the rational distribution of the material of the truss tower assembly, and improves the stress economy of the structure. The X-type node truss converts the load on the lower and upper frames into the axial force of the members, improves the load-bearing efficiency and overall stiffness of the upper and lower frames, and ensures the efficient downward transmission of loads. The K-type node truss enhances the local lateral stability of the middle frame, avoids lateral deformation of the frame after being loaded, and improves the overall structural stability of the truss tower assembly.

[0035] Specifically, the truss tower assembly 1 is designed with a square horizontal cross-section to fit the square layout space of the concrete tower assembly 2 and the tower column assembly 3; the vertical cross-section of the truss tower assembly 1 is designed as an isosceles trapezoid, making the frame narrow from bottom to top, which is suitable for the gradually decreasing load characteristics of the upper part of the tower. The X-type node truss can efficiently decompose the load on the frame into axial forces of the members, and the K-type node truss provides lateral support through the diagonal members. The overall force balance and stiffness matching of the truss tower assembly 1 ensure that the load transmitted from the upper part is evenly decomposed and transmitted to the ground foundation.

[0036] In some embodiments, the truss tower assembly 1 further includes a mounting member 14, which includes a mounting ring 141 and a plurality of connecting flanges 142. The mounting ring 141 is disposed on the ground, and the plurality of connecting flanges 142 are spaced apart along the circumferential direction at the bottom end of the lower frame 11. The connecting flanges 142 are connected to the mounting ring 141.

[0037] In this embodiment, the wind power combined tower structure provides a connection benchmark between the truss tower assembly and the ground foundation through the installation ring, ensuring that the load at the bottom of the truss tower assembly is evenly transferred to the ground and improving the stress rationality of the connection between the truss tower assembly and the ground. Through the installation of the connecting flange, a multi-point rigid connection between the lower frame of the truss tower assembly and the installation ring is realized, effectively dispersing the load at the connection point, avoiding stress concentration at a single point, and enhancing the connection strength between the truss tower assembly and the ground foundation.

[0038] Specifically, the mounting ring 141 is first fixed to the ground foundation to provide a ring-shaped connection foundation between the truss tower assembly 1 and the ground; multiple connecting flanges 142 are spaced apart at the bottom of the lower frame 11 along the circumferential direction and are connected to the mounting ring 141 to achieve a multi-point rigid connection between the lower frame 11 and the mounting ring 141. The vertical and horizontal loads on the lower frame 11 are distributed and transferred to the mounting ring 141 through each connecting flange 142, and then evenly transferred to the ground foundation by the mounting ring 141.

[0039] In some embodiments, the concrete tower assembly 2 includes a tower body 21, a base 22, and a top seat 23. The diameter of the tower body 21 gradually decreases from bottom to top. The tower body 21 is a hollow structure and a segmented tube structure. The base 22 is located at the bottom of the tower body 21 and is located in the truss tower assembly 1. The diameter of the base 22 is larger than the diameter of the tower body 21. The base 22 is used to connect with the truss tower assembly 1. The diameter of the top seat 23 is larger than the diameter of the top of the tower body 21. The top seat 23 is used to connect with the steel tower assembly 4.

[0040] The wind turbine combined tower structure in this embodiment, through the tower body design, adapts to the stress law of decreasing load on the upper part of the tower, achieving rational material distribution, while improving the lower stiffness of the concrete tower components and enhancing the overall lateral resistance and load-bearing capacity; the hollow tower body effectively reduces the overall self-weight of the concrete tower components, reducing the load on the lower load-bearing structure; the segmented tube-shaped tower body adapts to the self-lifting installation process, enabling on-site segmented assembly, significantly reducing the construction difficulty of high-altitude whole-section installation and improving construction convenience; the large-diameter base increases the contact and connection area between the concrete tower components and the tower column components and truss tower components, allowing the load to be evenly distributed and transferred, avoiding local stress concentration, and improving the rationality of stress distribution.

[0041] Specifically, the tower body 21 adopts a segmented tube structure, which can be assembled in sections on site; the base 22 is located at the bottom of the tower body 21 and inside the truss tower assembly 1, and its diameter is larger than that of the tower body 21, which increases the support contact area between the concrete tower assembly 2 and the tower column assembly 3; the top seat 23 has a diameter larger than that of the top of the tower body 21, which increases the connection contact area between the concrete tower assembly 2 and the steel tower assembly 4.

[0042] In some embodiments, the tower column assembly 3 includes a connecting plate 31 and a plurality of segmented columns 32. The connecting plate 31 is disposed on the lower side of the concrete tower assembly 2, and the plurality of segmented columns 32 are connected sequentially from bottom to top. The top segmented column 32 is connected to the connecting plate 31, and the bottom segmented column 32 is connected to the ground.

[0043] The wind power combined tower structure in this embodiment increases the contact area between the tower column assembly and the concrete tower assembly by setting the connecting plate, so that the vertical load is evenly distributed to each segment column, avoiding local stress concentration at the connection point and improving the load-bearing rationality of the tower column assembly. Through the segmented splicing structure of the segmented columns, it is adapted to the self-lifting installation process of the tower body, and can be assembled gradually as the construction progresses, reducing the on-site construction difficulty of the tower column assembly and improving construction efficiency.

[0044] Specifically, the connecting plate 31 of the tower column assembly 3 is fitted to the lower side of the concrete tower assembly 2 to increase the contact area between the tower column assembly 3 and the concrete tower assembly 2; the multiple segmented columns 32 adopt a segmented structure that is connected sequentially from bottom to top, which is compatible with the self-lifting installation process of the tower body and can be assembled and constructed gradually as the concrete tower assembly 2 is lifted.

[0045] In some embodiments, the wind power combined tower structure further includes a connecting component 6, which includes a plurality of upper connecting members 61. The plurality of upper connecting members 61 are spaced apart on the upper side of the base 22 along the circumferential direction and are evenly arranged along the circumferential direction. Each upper connecting member 61 includes a plurality of first connecting rods 611 and a plurality of first flanges 612. The plurality of first connecting rods 611 extend outward and connect to the top of the upper frame 13. The plurality of first flanges 612 are spaced apart on the base 22 along the circumferential direction. Each of the plurality of first flanges 612 corresponds to one of the plurality of first connecting rods 611, and the first connecting rods 611 are connected to the first flanges 612.

[0046] In this embodiment, the wind power combined tower structure features circumferentially spaced and evenly distributed upper connectors, ensuring a symmetrical distribution of tensile forces on the concrete tower assembly base. This prevents localized force shifts in the base and improves the stress balance at the connection points. A first connecting rod forms an upper tie support between the concrete tower assembly and the upper frame of the truss tower assembly, effectively transferring radial and overturning loads. A first flange provides a rigid, fixed connection between the first connecting rod and the concrete tower assembly base, ensuring reliable load transfer and enhancing the stability of the connection structure.

[0047] Specifically, multiple upper connectors 61 are spaced apart and evenly arranged on the upper side of the base 22 along the circumferential direction, so that the tension force of the upper connectors 61 on the base 22 is symmetrically distributed in a circle; the first connecting rod 611 of the upper connector 61 extends outward and connects to the top of the upper frame 13 of the truss tower assembly 1, forming an upper tension support between the concrete tower assembly 2 and the truss tower assembly 1, and transferring the radial load and overturning load transmitted from the upper part of the concrete tower assembly 2 to the truss tower assembly 1 through the first connecting rod 611; the first flange 612 is spaced apart on the base 22 along the circumferential direction and corresponds one-to-one with the first connecting rod 611, and the first flange 612 realizes the rigid fixed connection between the first connecting rod 611 and the base 22, ensuring reliable force transmission.

[0048] In some embodiments, the connecting assembly 6 further includes a plurality of lower connectors 62, which are spaced apart along the circumferential direction on the lower side of the base 22. The plurality of lower connectors 62 are evenly arranged along the circumferential direction. Each lower connector 62 includes a plurality of second connecting rods 621 and a plurality of second flanges 622. The plurality of second connecting rods 621 extend outward and connect to the bottom end of the upper frame 13. The plurality of second flanges 622 are spaced apart along the circumferential direction on the base 22. The plurality of second flanges 622 correspond one-to-one with the plurality of second connecting rods 621, and the second connecting rods 621 are connected to the second flanges 622.

[0049] In this embodiment, the wind turbine tower structure features a symmetrical force-bearing structure formed by the circumferentially spaced and evenly distributed lower connectors and the upper connectors. This ensures that the concrete tower assembly base is subjected to bidirectional tensile forces and that the circumferential forces are balanced, preventing localized stress concentration at the base. A second connecting rod forms a lower tensile support between the concrete tower assembly and the upper frame of the truss tower assembly. This support, in conjunction with the upper first connecting rod, achieves bidirectional tensile connection, effectively constraining the vertical and radial displacement of the concrete tower assembly and significantly improving the stability of the connection between the concrete tower assembly and the truss tower assembly. A second flange ensures a rigid and fixed connection between the second connecting rod and the concrete tower assembly base, guaranteeing the reliability of load transfer at the lower tensile connection and preventing loosening or deformation of the connection.

[0050] Specifically, the upper connectors 61 on the upper side of the multiple lower connectors 62 are arranged symmetrically, so that the base 22 is subjected to bidirectional tension forces in the circumferential direction. The second connecting rod 621 of the lower connector 62 extends outward and connects to the bottom end of the upper frame 13 of the truss tower assembly 1, forming a lower tension support between the concrete tower assembly 2 and the truss tower assembly 1. It cooperates with the first connecting rod 611 of the upper connector 61 to form a bidirectional tension limit on the base 22 of the concrete tower assembly 2. The second flange 622 is arranged at intervals along the circumferential direction on the base 22 and corresponds one-to-one with the second connecting rod 621. The second flange 622 realizes the rigid fixed connection between the second connecting rod 621 and the base 22, ensuring the reliable transmission of force at the lower tension part.

[0051] In some embodiments, the connecting assembly 6 further includes a plurality of connecting anchors 63, which penetrate the base 22 in a vertical direction. The top end of the connecting anchor 63 is connected to the first flange 612, and the bottom end of the connecting anchor 63 is connected to the second flange 622. The connecting anchor 63 is used to connect the first flange 612 and the second flange 622 in the same vertical direction.

[0052] In this embodiment of the wind power combined tower structure, the upper and lower flanges in the same vertical direction are rigidly connected by connecting anchor bolts, so that the upper and lower connecting parts form a linkage structure, realizing the force balance in the vertical direction and avoiding cracking or deformation of the base due to local stress at the top and bottom. By designing the connecting anchor bolts to penetrate the base vertically, a vertical fastening constraint is formed on the base. Combined with the radial tie of the upper and lower connecting rods, multi-dimensional limiting of the base is achieved, further constraining the vertical and radial displacement of the concrete tower components and improving the stability of the connection.

[0053] Specifically, the connecting anchor 63 rigidly connects the first flange and the second flange in the same vertical direction into one piece, so that the upper connecting part 61 and the lower connecting part 62 form a linkage structure through the connecting anchor. This structure can balance the tension transmitted by the first connecting rod and the tension / support force transmitted by the second connecting rod in the vertical direction of the base 22 through the connecting anchor, so as to avoid the base 22 from being locally cracked or deformed due to the upper and lower connecting parts being subjected to their own forces.

[0054] In some embodiments, the wind power combined tower structure further includes a steel strand assembly 7, which includes a plurality of steel strands 71 ​​and a plurality of guide wheels 72. The plurality of steel strands 71 ​​are connected to the bottom end of the steel tower assembly 4 in a circumferential direction. The steel strands 71 ​​extend downward through the top seat 23 and the base 22. The guide wheels 72 are rotatably disposed on the underside of the base 22. The plurality of guide wheels 72 correspond one-to-one with the plurality of steel strands 71. After being guided by the guide wheels 72, the steel strands 71 ​​are connected to the bottom end of the lower frame 11.

[0055] In this embodiment, the wind turbine combined tower structure utilizes steel strands to generate compressive stress in the concrete tower components, effectively offsetting the tensile stress generated by the tower body under load, thus improving the crack resistance and structural durability of the concrete tower components. The guiding action of the guide wheels changes the force transmission direction of the steel strands, while reducing frictional losses between the steel strands and the base, ensuring the reliability of steel strand tensioning and force transmission, and extending the service life of the steel strands. The steel strand components connect the steel tower components, concrete tower components, and truss tower components into a unified whole, forming a multi-component collaborative force-bearing system that effectively transmits vertical and overturning loads, enhancing the overall lateral and overturning resistance of the wind turbine combined tower.

[0056] Specifically, the steel strand 71 extends downward and passes through the top seat 23 and base 22 of the concrete tower assembly 2. After being guided by the guide wheel 72, the steel strand 71 changes the direction of force transmission and finally connects to the bottom end of the lower frame 11 of the truss tower assembly 1. By tensioning the steel strand 71, the concrete tower assembly 2 can generate circumferential compressive stress, which can offset the tensile stress generated by the concrete tower assembly 2 under the operation of wind power equipment and wind load. At the same time, the steel strand 71 forms an integral tie system with the steel tower assembly 4, the concrete tower assembly 2 and the truss tower assembly 1, and transfers the vertical and overturning loads on the steel tower assembly 4 and the concrete tower assembly 2 to the truss tower assembly 1 through the steel strand 71.

[0057] In some embodiments, the mounting component 14 further includes a stranded wire mounting ring 143 and a plurality of mounting holes 144. The stranded wire mounting ring 143 is disposed inside the mounting ring 141, and the plurality of mounting holes 144 are formed on the stranded wire mounting ring 143 in a circumferential direction. The plurality of mounting holes 144 correspond one-to-one with a plurality of steel strands 71, and the steel strands 71 ​​are connected to the mounting holes 144.

[0058] In this embodiment of the wind power combined tower structure, the installation rings provide a bottom anchoring foundation for the steel strands; the installation holes that correspond one-to-one with the steel strands enable precise anchoring connection of the steel strands, ensuring that the tension angle and stress state of each steel strand are consistent, thereby generating uniform compressive stress around the circumference of the concrete tower component and improving crack resistance.

[0059] Specifically, the stranded wire mounting ring 143 is located inside the mounting ring 141, providing a dedicated bottom anchoring connection base for the steel strand 71; after the steel strand 71 is redirected by the guide wheel 72, its end is fixedly connected to the corresponding mounting hole 144.

[0060] The wind turbine combined tower construction method of this invention, utilizing the wind turbine combined tower structure of any of the above embodiments, includes the following steps: Truss tower installation: Install and fix the truss tower assembly on the ground foundation. The truss tower assembly is a hollow structure with an open top. Steel tower hoisting: The steel tower assembly is hoisted into the hollow interior of the truss tower assembly. A limiting structure is set at the top of the truss tower assembly, and the steel tower assembly is lifted upward to a certain height by a ground lifting device. Concrete tower installation: The top of the concrete tower assembly is connected to the bottom of the steel tower assembly inside the truss tower assembly and on the lower side of the steel tower assembly. The concrete tower assembly segments are cyclically lifted by the ground lifting device using a self-lifting method. The segments of the concrete tower assembly are then assembled sequentially below until the concrete tower assembly is installed. Tower column installation: The concrete tower assembly is lifted to a certain height, and tower column segments are installed at the bottom of the concrete tower assembly. The tower column segments are lifted in a cyclical manner using a ground lifting device, and then assembled sequentially from below until the tower column assembly is installed. Connection and anchoring: Connecting and fixing the truss tower to the concrete tower.

[0061] The wind turbine tower construction method in this embodiment first completes the foundation frame erection through truss tower installation, providing a stable working framework and internal space for the subsequent construction of all components, ensuring the safety and convenience of subsequent construction. Pre-hoisting and jacking-up of the steel tower avoids spatial interference between the steel tower components and subsequent mixed tower and tower column components, while reserving working positions for precise connection between the mixed tower and the steel tower, improving component connection accuracy. The self-lifting technology used in the mixed tower installation transforms high-altitude assembly of the mixed tower into low-altitude work near the ground, significantly reducing the cost of the mixed tower installation. The segmented assembly method addresses the construction difficulties and safety risks, while improving on-site construction efficiency. By installing tower columns after the concrete tower assembly is completed and employing a self-lifting process, the tower column segments can precisely align with the support positions at the bottom of the concrete tower components, ensuring the vertical support effect of the tower column components on the concrete tower and improving the construction accuracy of the support structure. Finally, the connection and anchoring are used as the final construction step, completing the overall connection after all components are precisely installed. This allows the truss tower, concrete tower, tower columns, and steel tower components to form an integrated and collaborative load-bearing system, ensuring the overall structural stability and reliable force transmission of the tower.

[0062] Specifically, the process begins with the installation of the truss tower, fixing the truss tower components to the ground foundation to form the construction foundation and working framework for the entire tower. Its open, hollow top structure provides working space for the subsequent hoisting and assembly of various components. Next, the steel tower is hoisted, inserting the steel tower components into the truss tower components and lifting them using ground-based lifting equipment. A limiting structure is installed to prevent the steel tower components from tipping over, reserving working space for the subsequent connection of the concrete tower components to the steel tower components. Finally, the concrete tower is installed, connecting the top of the concrete tower components to the bottom of the steel tower components. Using a self-lifting process, the pre-assembled concrete tower sections are cyclically lifted by a ground lifting device, and the concrete tower segments are assembled sequentially below. The support and restraint of the truss tower components are used to achieve low-altitude assembly of the concrete tower, avoiding the risks of high-altitude construction. After the concrete tower is installed, the tower columns are installed. The concrete tower components are lifted again, and the tower columns are assembled segment by segment at the bottom. The self-lifting process is used to complete the installation of the tower column components, so that the tower column components can accurately form vertical support for the concrete tower components. Finally, the connection and anchoring are implemented to reliably connect the truss tower components and the concrete tower components through connecting components.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A wind power combined tower structure, characterized in that, include: Truss tower assembly (1), the truss tower assembly (1) is a hollow structure with an open top, the truss tower assembly (1) is used to connect to the ground; A concrete tower assembly (2) is disposed on the upper side of the truss tower assembly (1). The bottom of the concrete tower assembly (2) extends from the top opening of the truss tower assembly (1) into the truss tower assembly (1). The concrete tower assembly (2) is connected to the truss tower assembly (1). Tower column assembly (3), which is disposed in the truss tower assembly (1), is located on the lower side of the concrete tower assembly (2), and is used to support the concrete tower assembly (2). A steel tower assembly (4) is mounted on the concrete tower assembly (2) and is used to install wind power equipment (5).

2. The wind power combined tower structure according to claim 1, characterized in that, The horizontal cross section of the truss tower assembly (1) is square, and the vertical cross section of the truss tower assembly (1) is an isosceles trapezoid. The truss tower assembly (1) includes a lower frame (11), a middle frame (12) and an upper frame (13) from bottom to top. The lower frame (11) and the upper frame (13) are X-type node trusses, and the middle frame (12) is a K-type node truss.

3. The wind power combined tower structure according to claim 2, characterized in that, The truss tower assembly (1) also includes an installation component (14), which includes an installation ring (141) and a plurality of connecting flanges (142). The installation ring (141) is disposed on the ground, and the plurality of connecting flanges (142) are spaced apart along the circumferential direction at the bottom end of the lower frame (11). The connecting flanges (142) are connected to the installation ring (141).

4. The wind power combined tower structure according to claim 2, characterized in that, The concrete tower assembly (2) includes a tower body (21), a base (22) and a top seat (23). The diameter of the tower body (21) gradually decreases from bottom to top. The tower body (21) is a hollow structure and a segmented tube structure. The base (22) is located at the bottom of the tower body (21) and is located in the truss tower assembly (1). The diameter of the base (22) is larger than the diameter of the tower body (21). The base (22) is used to connect with the truss tower assembly (1). The diameter of the top seat (23) is larger than the diameter of the top of the tower body (21). The top seat (23) is used to connect with the steel tower assembly (4).

5. The wind power combined tower structure according to claim 1, characterized in that, The tower column assembly (3) includes a connecting plate (31) and multiple segmented columns (32). The connecting plate (31) is located on the lower side of the concrete tower assembly (2). The multiple segmented columns (32) are connected sequentially from bottom to top. The top segmented column (32) is connected to the connecting plate (31), and the bottom segmented column (32) is connected to the ground.

6. The wind power combined tower structure according to claim 4, characterized in that, It also includes a connecting component (6), which includes a plurality of upper connectors (61). The plurality of upper connectors (61) are spaced apart along the circumferential direction on the upper side of the base (22). The plurality of upper connectors (61) are evenly arranged along the circumferential direction. The upper connectors (61) include a plurality of first connecting rods (611) and a plurality of first flanges (612). The plurality of first connecting rods (611) extend outward and connect to the top of the upper shelf (13). The plurality of first flanges (612) are spaced apart along the circumferential direction on the base (22). The plurality of first flanges (612) correspond one-to-one with the plurality of first connecting rods (611). The first connecting rods (611) are connected to the first flanges (612).

7. The wind power combined tower structure according to claim 6, characterized in that, The connecting assembly (6) further includes a plurality of lower connectors (62), which are spaced apart along the circumferential direction on the lower side of the base (22). The plurality of lower connectors (62) are evenly arranged along the circumferential direction. Each lower connector (62) includes a plurality of second connecting rods (621) and a plurality of second flanges (622). The plurality of second connecting rods (621) extend outward and connect to the bottom end of the upper frame (13). The plurality of second flanges (622) are spaced apart along the circumferential direction on the base (22). The plurality of second flanges (622) correspond one-to-one with the plurality of second connecting rods (621). The second connecting rods (621) are connected to the second flanges (622).

8. The wind power combined tower structure according to claim 7, characterized in that, The connecting assembly (6) further includes a plurality of connecting anchors (63), which penetrate the base (22) vertically. The top end of the connecting anchor (63) is connected to the first flange (612), and the bottom end of the connecting anchor (63) is connected to the second flange (622). The connecting anchor (63) is used to connect the first flange (612) and the second flange (622) in the same vertical direction.

9. The wind power combined tower structure according to claim 4, characterized in that, It also includes a steel strand assembly (7), which includes multiple steel strands (71) and multiple guide wheels (72). The multiple steel strands (71) are connected to the bottom end of the steel tower assembly (4) in a circumferential direction. The steel strands (71) extend downward through the top seat (23) and the base (22). The guide wheels (72) are rotatably disposed on the lower side of the base (22). The multiple guide wheels (72) correspond one-to-one with the multiple steel strands (71). After being guided by the guide wheels (72), the steel strands (71) are connected to the bottom end of the lower frame (11).

10. A construction method for a wind turbine combined tower, comprising the wind turbine combined tower structure according to any one of claims 1-9, characterized in that, Includes the following steps: Truss tower installation: The truss tower assembly is installed on the ground foundation and fixed. The truss tower assembly is a hollow structure with an open top. Steel tower hoisting: The steel tower assembly is hoisted into the hollow interior of the truss tower assembly. A limiting structure is set at the top of the truss tower assembly, and the steel tower assembly is lifted upward to a certain height by a ground lifting device. Concrete tower installation: The top of the concrete tower assembly is connected to the bottom of the steel tower assembly inside the truss tower assembly and on the lower side of the steel tower assembly. The concrete tower assembly segments are cyclically lifted by the ground lifting device using a self-lifting method. The segments of the concrete tower assembly are then assembled sequentially below until the concrete tower assembly is installed. Tower column installation: The concrete tower assembly is lifted to a certain height, and tower column segments are installed at the bottom of the concrete tower assembly. The tower column segments are lifted in a cyclical manner using a ground lifting device, and then assembled sequentially from below until the tower column assembly is installed. Connection and anchoring: Connecting and fixing the truss tower to the concrete tower.

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