Modular wind power mixed tower pipe piece

Abstract

The utility model relates to wind power generation technical field, more particularly, a kind of modular wind power mixed tower pipe piece, including concrete foundation and reinforced skeleton, by the structure of the upper end plate and lower end plate made of metal being set on reinforced skeleton, the structural strength of modular wind power mixed tower pipe piece horizontal joint can be strengthened. By the design that the center of circle of positioning column / positioning hole is located respectively on the quarter line of central angle alpha, when realizing the misregistration assembly of upper and lower tower section, accurate positioning can be realized, to realize the structural strength of vertical joint is strengthened. By being provided with positioning column on lower end plate, the structure that upper end plate is provided with positioning hole corresponding positioning column can realize coarse positioning, further, by wedge block setting and positioning hole, accurate positioning can be realized.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, and more specifically, to a modular wind power hybrid tower segment. Background Technology

[0002] The wind turbine tower is the supporting structure of the wind turbine, responsible for bearing the weight of the hundreds of tons of wind turbine and transferring its weight to the foundation. It also serves as a crucial support foundation for wind turbine maintenance, power transmission, and other functions. To overcome the problems of large on-site workload, long construction period, and large formwork usage associated with traditional cast-in-place concrete towers, and to solve the technical difficulties of transporting large concrete components, precast segment technology emerged. This technology involves prefabricating the lower section of the tower's reinforced concrete structure into sheet-like or arc-shaped components in a factory, which are then transported to the wind farm for assembly. With the continuous improvement of my country's wind power scale and technology, the application of precast segment technology is becoming increasingly widespread.

[0003] Wind turbine towers are subjected to enormous dynamic loads year-round. Compared to monolithically cast tower walls, towers assembled from multiple precast segments present greater challenges in positioning during installation, making the joints relatively weak points in the structure. Under significant lateral shear forces, these joints are prone to fatigue damage and cracking. Therefore, improving the structural strength of the precast segment joints has become an important research direction. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a modular wind turbine hybrid tower segment, designed to improve the accuracy of installation and positioning, and the structural strength at the joints.

[0005] A modular wind power hybrid tower segment according to an embodiment of the present invention includes:

[0006] Concrete foundation; the concrete foundation is designed in an arc shape, the central angle of the concrete foundation is α, n*α=360°, where n≥2, and n is an integer number of the tube segments that make up the tower;

[0007] A reinforcing steel cage is disposed inside the concrete foundation. The reinforcing steel cage has an upper end plate and a lower end plate. The upper end plate is attached to the upper surface of the concrete foundation, and the lower end plate is attached to the lower surface of the concrete foundation. The lower end plate is provided with a positioning post, and the upper end plate is provided with a positioning hole corresponding to the positioning post. The centers of the positioning post and the positioning hole are respectively located on the four bisectors of the central angle α. The positioning post is provided with a positioning wedge on its circumference, and the positioning hole is provided with a positioning groove corresponding to the positioning wedge.

[0008] According to some embodiments of the present invention, the positioning post is cylindrical, and a guide bevel is provided at the outer edge of the positioning post; a guide slope is provided at the positioning hole corresponding to the guide bevel.

[0009] According to some embodiments of this utility model, the positioning post and the positioning hole are in clearance fit.

[0010] According to some embodiments of the present invention, the steel reinforcement cage includes a plurality of main bars, which are distributed and arranged in the concrete foundation along the circumferential direction of the concrete foundation; the upper end of the main bars is connected to the upper end plate, and the lower end of the main bars is connected to the lower end plate.

[0011] According to some embodiments of this utility model, the main rib has a ring-shaped structure.

[0012] According to some embodiments of the present invention, a hand hole is provided on the inner peripheral wall of the concrete foundation, and part of the main reinforcement is exposed in the slot of the hand hole.

[0013] According to some embodiments of the present invention, the steel reinforcement cage includes a plurality of structural bars, which are arranged vertically on the main bars.

[0014] According to some embodiments of the present invention, a connector is also included, the connector comprising a washer, a fastening bolt and a nut, the washer being disposed within the hand hole portion, and the fastening bolt being threaded through the washer, the concrete foundation and the nut.

[0015] According to some embodiments of the present invention, the gasket is provided with a welding part, and the welding part is fixedly connected to the structural reinforcement / main reinforcement.

[0016] According to some embodiments of the present invention, the inner peripheral wall of the concrete foundation is provided with a number of reinforcing ribs.

[0017] A modular wind power hybrid tower segment according to an embodiment of the present utility model has at least the following beneficial effects:

[0018] According to the present invention, the modular wind turbine hybrid tower segment includes a concrete foundation and a steel reinforcement frame. In this embodiment, the concrete foundation is designed in an arc shape with a central angle α, n*α=360°, where n≥2, and n is an integer number of segments forming the tower. The steel reinforcement frame is located inside the concrete foundation. The steel reinforcement frame has an upper end plate and a lower end plate, with the upper end plate fitting against the upper surface of the concrete foundation and the lower end plate fitting against the lower surface of the concrete foundation. The lower end plate has a positioning post, and the upper end plate has a positioning hole corresponding to the positioning post. The centers of the positioning post / positioning hole are located on the four bisectors of the central angle α. A positioning wedge is provided around the circumference of the positioning post, and a positioning hole is provided corresponding to the positioning wedge. By setting a metal upper and lower end plate on the steel reinforcement frame, the structural strength of the transverse joints of the modular wind turbine hybrid tower segment can be strengthened. By aligning the centers of the positioning posts / positioning holes along the four bisectors of the central angle α, accurate positioning is achieved during the staggered assembly of the upper and lower tower sections, thereby strengthening the structural integrity of the vertical joints. Coarse positioning is achieved by using positioning posts on the lower end plate and corresponding positioning holes on the upper end plate. Furthermore, precise positioning is achieved through the use of wedges and positioning holes. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a splicing structure for the tower of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of a steel reinforcement cage according to the present invention;

[0022] Figure 4 This is a schematic diagram showing the distribution of the positioning holes of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the upper and lower end plates of this utility model;

[0024] Figure 6 This is a schematic diagram of a connector of this utility model.

[0025] In the picture:

[0026] 100 - Concrete foundation, 101 - Central angle, 102 - Quarter line, 110 - Hand hole, 120 - Reinforcing rib;

[0027] 200-Reinforcing steel cage, 210-Upper end plate, 211-Positioning hole, 212-Positioning slot, 213-Guide slope, 220-Lower end plate, 221-Positioning column, 222-Positioning wedge, 223-Guide angle, 230-Main reinforcement, 240-Structural reinforcement, 250-Connector, 251-Washer, 252-Fasting bolt, 253-Nut, 254-Welded part;

[0028] 300 - Tower tube, 310 - Tower section, 311 - Tube segment. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model.

[0031] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Reference Figures 1 to 6As shown, this utility model discloses a modular wind power hybrid tower segment, including a concrete foundation 100 and a steel reinforcement frame 200. The concrete foundation 100 is designed in an arc shape, with a central angle 101 of α, n*α=360°, where n≥2, and n is an integer number of the segments 311 that make up the tower 300. Preferably, the central angle 101 of the concrete foundation 100 is 90°. Therefore, four modular wind power hybrid tower segments 311 can be first spliced ​​into a circular tower segment 310. After the circular tower segment 310 is spliced ​​on the construction site, the circular tower segment 310 is then spliced ​​into the tower 300 from bottom to top along the circumferential direction according to the design drawings. A reinforcing steel cage 200 is installed inside the concrete foundation 100. The reinforcing steel cage 200 has an upper end plate 210 and a lower end plate 220. The upper end plate 210 is attached to the upper surface of the concrete foundation 100, and the lower end plate 220 is attached to the lower surface of the concrete foundation 100. In this embodiment, both the upper end plate 210 and the lower end plate 220 are made of metal. After each tower segment 310 is fixed, adjacent upper end plates 210 and lower end plates 220 can be welded together. The lower end plate 220 is provided with a positioning post 221, and the upper end plate 210 is provided with a positioning hole 211 corresponding to the positioning post 221. The centers of the positioning post 221 and the positioning hole 211 are located on the quarter line 102 of the central angle 101α. A positioning wedge 222 is provided around the positioning post 221, and the positioning hole 211 is provided with a positioning hole 212 corresponding to the positioning wedge 222. In this embodiment, to achieve accurate alignment and structural reliability between segments 311, a two-stage positioning mechanism is adopted. The positioning posts 221 on the lower end plate 220 and the corresponding positioning holes 211 on the upper end plate 210 constitute a coarse positioning system, enabling the segments 311 to quickly find their corresponding positions during initial hoisting. In this embodiment, the positioning posts 221 and positioning holes 211 are fitted with a clearance fit. In this embodiment, the centers of both the positioning posts 221 and positioning holes 211 are located on the quarter line 102 of the central angle 101α. This design allows for circumferential staggered arrangement of the upper and lower segments 311 during assembly, thereby enhancing the overall rigidity and shear resistance of the tower 300. Based on the coarse positioning, positioning wedges 222 circumferentially positioned on the positioning posts 221 cooperate with the corresponding positioning holes 211 and 212 around the positioning holes 211 to form a precise positioning mechanism. During insertion, the wedges gradually guide the segments 311 to their designed positions, ultimately achieving a tight connection and effective load transfer. The design of this structure, through coarse and fine two-stage positioning combined with a staggered design of four equal division lines 102, significantly improves the operability and splicing accuracy of on-site assembly, reducing the difficulty of hoisting and adjustment and construction time. The design of the upper end plate 210 and the lower end plate 220 can improve the structural strength of the transverse joints, and the staggered assembly method helps to improve the mechanical properties of the vertical joints of the tower 300, evenly distribute transverse shear force, and reduce stress concentration.Meanwhile, the combination of modular prefabrication and mechanized assembly improves construction efficiency while ensuring consistent quality, providing a reliable guarantee for the safety and durability of large-scale mixed tower structures.

[0034] In some embodiments of this utility model, the positioning post 221 is cylindrical, and a guide bevel 223 is provided at the outer edge of the positioning post 221; the corresponding guide bevel 223 of the positioning hole 211 is provided with a guide slope 213. The cylindrical positioning post 221 and the guide structure with the slope further reduce the difficulty of docking and improve assembly efficiency and fault tolerance. The design of the positioning hole 211 and the positioning post 221 helps to improve the mechanical properties of the transverse joint of the tower 300, evenly distribute the transverse shear force, and reduce stress concentration. At the same time, the combination of modular prefabrication and mechanized assembly improves construction efficiency while ensuring quality consistency.

[0035] In some embodiments of this utility model, the reinforcing steel cage 200 includes a plurality of main reinforcing bars 230, which are distributed along the circumference of the concrete foundation 100 within the concrete foundation 100. The upper ends of the main reinforcing bars 230 are connected to the upper end plate 210, and the lower ends of the main reinforcing bars 230 are connected to the lower end plate 220. In this embodiment, the reinforcing steel cage 200 serves as the core load-bearing component of the segment 311. The plurality of main reinforcing bars 230 contained within the reinforcing steel cage 200 are evenly distributed along the circumference of the concrete foundation 100 and are integrally embedded in the concrete. The upper ends of the main reinforcing bars 230 are connected to the upper end plate 210, and the lower ends are connected to the lower end plate 220, thereby forming a rigid cage within the segment 311 that tightly connects the reinforcing bars and the end plates. The main function of this structure is to effectively transfer various loads borne by the tower 300 to the upper and lower end plates 220 through the main reinforcing bars 230, and then realize the force transfer between adjacent segments 311 through the mechanical connection between the end plates. The design of this structure not only significantly enhances the overall load-bearing capacity and stiffness of segment 311, but also enables segment 311 to form a continuous and stable stress system after assembly, effectively improving the shear resistance and fatigue resistance of the joint area.

[0036] In some embodiments of this utility model, the main reinforcement 230 is in a ring structure. In this embodiment, the main reinforcement 230 in the steel reinforcement skeleton 200 is arranged in a ring structure, and several main reinforcements 230 are evenly arranged along the circumference of the concrete foundation 100. This arrangement allows the main reinforcement 230 to form a coordinated force-bearing system with the arc-shaped concrete foundation 100. The upper end of the ring-shaped main reinforcement 230 is connected to the upper end plate 210, and the lower end is connected to the lower end plate 220, forming a continuous force-bearing frame that can effectively transmit circumferential stress and radial bending moment. This structure not only significantly enhances the overall load-bearing stiffness and deformation resistance of the segment 311, but more importantly, it enables the segment 311 to form a complete ring structure with consistent mechanical properties after assembly, effectively improving the stress distribution in the joint area and enhancing the integrity and durability of the tower 300 under complex loads.

[0037] In some embodiments of this utility model, a handhole 110 is provided on the inner peripheral wall of the concrete foundation 100, and part of the main reinforcement 230 is exposed in the slot of the handhole 110. By using the main reinforcement 230 partially exposed in the handhole 110, when the modular wind power hybrid tower segments 311 are spliced ​​into a ring-shaped pipe section, steel cables can be added to the inner peripheral side of the ring-shaped pipe section as a further tensioning structure to improve the overall structural strength of the ring-shaped pipe section.

[0038] In some embodiments of this utility model, the reinforcing steel cage 200 includes a plurality of structural reinforcement bars 240, which are arranged vertically on the main reinforcement bars 230. Specifically, in this embodiment, the main reinforcement bars 230 in the reinforcing steel cage 200 are arranged in a ring shape, and the plurality of main reinforcement bars 230 are evenly arranged along the circumference of the concrete foundation 100, together forming the core load-bearing frame of the segment 311. On this ring-shaped main reinforcement bar 230 structure, structural reinforcement bars 240 arranged vertically are also provided. The structural reinforcement bars 240 and the ring-shaped main reinforcement bars 230 are welded to form an integrated spatial grid-like reinforcement system. The vertical structural reinforcement bars 240 not only enhance the overall stability of the main reinforcement bars 230 and effectively prevent the displacement or deformation of the main reinforcement bars 230 during concrete pouring and stress, but more importantly, they significantly improve the axial crack resistance and integrity of the segment 311, enabling the reinforcing steel cage 200 to work together better to jointly bear the complex loads generated during the operation of the tower 300.

[0039] In some embodiments of this utility model, a connector 250 is also included. The connector 250 includes a washer 251, a fastening bolt 252, and a nut 253. The washer 251 is disposed within the hand hole portion 110, and the fastening bolt 252 passes through the washer 251, the concrete foundation 100, and the nut 253 for threaded connection. Specifically, in this embodiment, the connection system is a key part to ensure the integrity of the assembly, and it mainly includes the washer 251, the fastening bolt 252, and the nut 253. The washer 251 is installed within the hand hole portion 110 of the tube segment 311, and the fastening bolt 252 passes through the washer 251 and the pre-set channel in the concrete foundation 100, ultimately forming a threaded connection with the nut 253. This connection method, by applying a pre-tightening force to the bolt, creates a compressive effect between adjacent tube segments 311, significantly enhancing the shear strength and anti-separation ability of the joint, thereby effectively improving the overall stability and structural reliability of the tower 300.

[0040] In some embodiments of this utility model, a welding portion 254 is provided on the gasket 251, and the welding portion 254 is fixedly connected to the structural reinforcement 240 / main reinforcement 230. In this embodiment, the welding portion 254 can be designed as a semi-ring structure according to the structure of the main reinforcement 230 or the structural reinforcement 240. Through this structural design, the contact area between the welding portion 254 and the main reinforcement 230 or the structural reinforcement 240 can be increased. In this embodiment, the gasket 251 is firmly welded to the reinforcing steel skeleton 200 through the welding portion 254.

[0041] In some embodiments of this utility model, a plurality of reinforcing ribs 120 are provided on the inner peripheral wall of the concrete foundation 100. By providing reinforcing ribs 120, the structural strength of the concrete foundation 100 can be further improved.

[0042] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A modular wind power hybrid tower segment, characterized in that, include: Concrete foundation (100); The concrete foundation (100) is designed in an arc shape, and the central angle (101) of the concrete foundation (100) is α, n*α=360°, where n≥2, and n is an integer number of the tube segments that make up the tower. A steel reinforcement cage (200) is disposed inside the concrete foundation (100); the steel reinforcement cage (200) is provided with an upper end plate (210) and a lower end plate (220), the upper end plate (210) is attached to the upper end surface of the concrete foundation (100), and the lower end plate (220) is attached to the lower end surface of the concrete foundation (100); the lower end plate (220) is provided with a positioning post (221), and the upper end plate (210) is provided with a positioning hole (211) corresponding to the positioning post (221); the center of the positioning post (221) and the positioning hole (211) are respectively located on the four-equal bisector (102) of the central angle (101) α; a positioning wedge (222) is provided on the circumference of the positioning post (221), and a positioning slot (212) is provided on the positioning wedge (222) corresponding to the positioning hole (211).

2. The modular wind power hybrid tower segment according to claim 1, characterized in that, The positioning post (221) is cylindrical, and a guide bevel (223) is provided at the outer edge of the positioning post (221); the positioning hole (211) is provided with a guide bevel (213) corresponding to the guide bevel (223).

3. The modular wind power hybrid tower segment according to claim 2, characterized in that, The positioning pin (221) and the positioning hole (211) are fitted with a clearance.

4. The modular wind power hybrid tower segment according to claim 1, characterized in that, The steel reinforcement cage (200) includes a plurality of main bars (230), which are distributed along the circumference of the concrete foundation (100) within the concrete foundation (100); the upper end of the main bar (230) is connected to the upper end plate (210), and the lower end of the main bar (230) is connected to the lower end plate (220).

5. The modular wind power hybrid tower segment according to claim 4, characterized in that, The main reinforcement (230) has a ring structure.

6. The modular wind power hybrid tower segment according to claim 5, characterized in that, The inner peripheral wall of the concrete foundation (100) is provided with a hand hole (110), and part of the main reinforcement (230) is exposed in the slot of the hand hole (110).

7. The modular wind power hybrid tower segment according to claim 6, characterized in that, The steel reinforcement cage (200) includes a number of structural bars (240), which are arranged vertically on the main bars (230).

8. The modular wind power hybrid tower segment according to claim 7, characterized in that, It also includes a connector (250), which includes a washer (251), a fastening bolt (252) and a nut (253). The washer (251) is disposed in the hand hole (110), and the fastening bolt (252) is threaded through the washer (251), the concrete foundation (100) and the nut (253).

9. The modular wind power hybrid tower segment according to claim 8, characterized in that, The gasket (251) is provided with a welding part (254), and the welding part (254) is fixedly connected to the structural reinforcement (240) / the main reinforcement (230).

10. The modular wind power hybrid tower segment according to claim 1, characterized in that, The inner peripheral wall of the concrete foundation (100) is provided with several reinforcing ribs (120).

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