Prestressed wind power lattice tower column variable angle component

Abstract

The utility model discloses a prestressed wind power lattice type tower column angle change part, including the steering portion, the upper tower column connecting portion of being located at the top of steering portion and the lower tower column connecting portion of being located at the bottom of steering portion, the steering portion is equipped with the prestressed cable bundle channel along its axial direction, and the prestressed cable bundle channel forms the smooth inner convex structure to the steering side at the position of the steering of prestressed cable bundle. The application realizes the steering of tower column angle change and prestressed cable bundle simultaneously through the additional angle change part, and the angle change part is the separate part independent of tower column component, is convenient for processing, guarantees the unity of tower column component form, construction, is favorable to its scale production. The prestressed cable bundle can realize automatic gathering and smooth steering when tensioning, and reduces the prestress loss caused by steering.

Description

Technical Field

[0001] This utility model relates to the technical field of wind power generation, and in particular to a prestressed wind power lattice tower column angle-changing component. Background Technology

[0002] With the continued advancement of carbon peaking and carbon neutrality policies, wind power, as a representative of clean energy, has experienced rapid development. In order to continuously improve the utilization rate of wind resources and the return on investment, the trend of wind turbines becoming larger has become obvious in recent years, manifested in the continuous increase in single unit capacity and blade length. These have placed more stringent requirements on wind turbine towers and become a bottleneck problem restricting the development of larger wind turbines. On the one hand, wind turbine towers need to have higher load-bearing capacity to cope with more severe load environments; on the other hand, wind turbine towers need to reach greater heights to lift the ever-growing wind turbine blades.

[0003] Traditional wind turbine towers, such as monotube steel towers and monotube hybrid towers, are not well-suited for large wind turbines. Lattice wind turbine towers, however, offer advantages such as high component load-bearing efficiency, ease of transportation and hoisting, and convenient and reliable connections, making them a more promising choice for supporting large wind turbines. Lattice wind turbine towers typically improve stiffness and load-bearing capacity through a diffused arrangement of the tower columns. To avoid blade sweeping issues, lattice towers are often used only below the blade area, or the lattice towers are extended below the blade area. The latter is more suitable for longer blades, but it can lead to issues such as tower angle changes and prestressed cable strand reversal, requiring special tower column designs and targeted structural measures. This makes the manufacturing process of the angle-changing section of the tower complex and difficult to process, resulting in non-standard tower specifications and hindering large-scale production. Furthermore, existing technologies also suffer from significant prestress loss at angle-changing points during prestressed cable tensioning. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a prestressed wind power lattice tower column angle-changing component.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This utility model discloses a prestressed wind power lattice tower column angle-changing component, including a turning part, an upper tower column connecting part located at the top of the turning part, and a lower tower column connecting part located at the bottom of the turning part.

[0007] The turning part is provided with a prestressed cable bundle channel along its axial direction, and the prestressed cable bundle channel has a smooth inward convex structure facing the turning side at the position where the prestressed cable bundle turns.

[0008] This utility model discloses a prestressed wind power lattice tower column angle-changing component. Furthermore, the cross-section of the prestressed cable bundle channel at the smooth inner convex structure is a bell-shaped hole with one end larger than the other. The smaller end of the bell-shaped hole is an arc segment with a diameter larger than the diameter of the prestressed cable bundle. The smaller end of the bell-shaped hole faces the direction of the prestressed cable bundle turning, and the shape of the bell-shaped hole gradually decreases from both ends of the smooth inner convex structure to the central hole, thereby forming a smooth inner convex structure.

[0009] This utility model discloses a prestressed wind turbine lattice tower column angle-changing component. Further, the turning part includes an outer steel pipe, an upper inner steel pipe and a lower inner steel pipe located at both ends inside the outer steel pipe, and an inner lining steel plate located in the center inside the outer steel pipe. The upper inner steel pipe, the lower inner steel pipe, and the inner lining steel plate enclose and form a prestressed cable bundle channel. The inner lining steel plate forms a smooth inner convex structure, and a filler material is provided between the outer steel pipe and the prestressed cable bundle channel.

[0010] This utility model discloses a prestressed wind power lattice tower column angle-changing component. Furthermore, an inner ring plate is provided between the inner lining steel plate and the outer steel pipe, and the inner ring plate is provided with a bell-shaped hole adapted to the cross-section of the inner lining steel plate.

[0011] This utility model discloses a prestressed wind power lattice tower column angle-changing component. Furthermore, the inner ring plate is provided with three layers at intervals along the axial direction of the inner lining steel plate, namely an upper inner ring plate, a middle inner ring plate, and a lower inner ring plate. The bell-shaped hole on the middle inner ring plate is smaller than the bell-shaped hole on the upper inner ring plate and the lower inner ring plate.

[0012] This utility model discloses a prestressed wind power lattice tower column angle-changing component. Further, the outer steel pipe is provided with a web member connection part, and the web member connection part is provided with longitudinal stiffening ribs at corresponding positions. The longitudinal stiffening ribs are located between the outer steel pipe and the upper inner steel pipe, and between the outer steel pipe and the lower inner steel pipe.

[0013] This utility model discloses a prestressed wind turbine lattice tower column angle-changing component. Furthermore, both the upper and lower tower column connecting parts are flange connections used to connect to the tower column.

[0014] This utility model discloses a prestressed wind power lattice tower column angle-changing component, further wherein the inner lining steel plate has a low-friction plate on its smooth inner convex structure.

[0015] This utility model discloses a prestressed wind power lattice tower column angle-changing component, wherein the center of the arc segment is located at the center of the inner ring plate.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] 1. This application adds a turning section, which is a separate component independent of the tower column members. This turning section can simultaneously achieve tower column angle changes and prestressed cable strand turning, facilitating processing and ensuring the uniformity of the tower column member's form and structure, thus promoting large-scale production. During prestressed cable strand tensioning, it can automatically converge and smoothly turn, reducing prestress loss caused by turning.

[0018] 2. By using bell-shaped holes, this special shape of opening ensures as much space as possible for cable threading, allowing the prestressed cable bundles to automatically converge towards the center after tensioning and basically maintain the cross-sectional shape before turning. On the one hand, it can reduce the prestress loss caused by turning, and on the other hand, it can avoid the prestressed cable bundles contacting the hole wall after changing direction, thus avoiding additional prestress loss.

[0019] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the connection structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the variable angle component structure of this utility model;

[0022] Figure 3 This is a plan view of the angle-changing component of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure for installing the protruding longitudinal stiffening ribs of this utility model;

[0024] Figure 5 This is a planar schematic diagram of the angle-changing component and the inner ring plate of this utility model;

[0025] Figure 6 This is a plan view of the inner ring plate of this utility model;

[0026] Figure 7 This is a schematic diagram of the installation of the low-friction plate of this utility model.

[0027] Figure label:

[0028] 1. Turning section; 110. Longitudinal stiffening rib; 11. Outer steel pipe; 12. Upper inner steel pipe; 13. Inner lining steel plate; 14. Upper inner ring plate; 141. Central hole; 142. Side hole; 15. Middle inner ring plate; 16. Lower inner ring plate; 17. Low friction plate; 18. Lower inner steel pipe; 19. Concrete; 2. Upper tower column connection; 3. Lower tower column connection; 4. Web member connection. Detailed Implementation

[0029] like Figures 1-7As shown, this utility model discloses a tower column angle-changing component for a prestressed wind turbine lattice tower, including a turning part 1, an upper tower column connecting part 2, a lower tower column connecting part 3, and a web member connecting part 4. The upper tower column connecting part 2 is a flange connection used to connect to the upper tower column, with the flange angle matching that of the upper tower column flange. Similarly, the lower tower column connecting part 3 is a flange connection used to connect to the lower tower column, with the flange angle matching that of the lower tower column flange. The web member connecting part 4 is a steel plate, arranged at the location where web members need to be connected, with a shape coordinated with the distribution of web members, and pre-drilled bolt holes.

[0030] The turning part 1 includes an outer steel pipe 11, an upper inner steel pipe 12 and a lower inner steel pipe 18 located at both ends inside the outer steel pipe 11, and an inner lining steel plate 13 located in the center inside the outer steel pipe 11. The upper inner steel pipe 12, the lower inner steel pipe 18, and the inner lining steel plate 13 enclose and form a prestressed cable bundle channel. The inner lining steel plate 13 is supported and its shape is adjusted by an upper inner ring plate 14, a middle inner ring plate 15, and a lower inner ring plate 16. At the turning position of the prestressed cable bundle, it forms a smooth inner convex structure according to the required shape, so that the prestressed cable bundle can achieve controllable and uniform turning.

[0031] The inner side of the inner steel plate 13 is covered with a low-friction plate 17 to facilitate the tensioning of the prestressed cable bundles and reduce prestress loss. The inner steel plate 13 on the outer side of the corner generally does not come into contact with the prestressed cable bundles, so the low-friction plate 17 is not required. The space between the outer steel pipe 11 and the prestressed cable bundle channel is filled with concrete 19 or high-strength grout to ensure the rigidity and strength of the turning part 1.

[0032] The upper inner ring plate 14, the middle inner ring plate 15, and the lower inner ring plate 16 have similar shapes. Taking the upper inner ring plate 14 as an example, it is provided with a central hole 141 and a side hole 142. The central hole 141 is an eccentric bell-shaped hole with one end larger than the other. The larger end is an arc segment with the same outer diameter as the upper inner steel pipe 12, and the smaller end is an arc segment with a diameter slightly larger than the prestressed cable bundle. The concave part of the arc segment faces the turning side, and the center is located at the center of the upper inner ring plate 14. This special shape of the hole, while ensuring as much space as possible for cable threading, allows the prestressed cable bundle to automatically converge towards the center after tensioning and basically maintain the cross-sectional shape before turning. On the one hand, it can reduce the prestress loss caused by turning, and on the other hand, it can avoid the prestressed cable bundle contacting the hole wall after changing direction, which would cause additional prestress loss.

[0033] The central hole 141 of the inner ring plate 15 is smaller than the central holes 141 of the upper inner ring plate 14 and the lower inner ring plate 16 to complete the prestressed cable strand turning, forming a smooth inner convex through hole structure with large upper and lower ends and small center.

[0034] The web member connection part 4 is provided with longitudinal stiffening ribs 110 at the corresponding positions. The longitudinal stiffening ribs 110 are located between the outer steel pipe 11 and the upper inner steel pipe 12, and between the outer steel pipe 11 and the lower inner steel pipe 18.

[0035] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A prestressed wind turbine lattice tower column angle-changing component, characterized in that, It includes a steering part (1), an upper tower column connecting part (2) located at the top of the steering part (1), and a lower tower column connecting part (3) located at the bottom of the steering part (1); The turning part (1) is provided with a prestressed cable bundle channel along its axial direction. The prestressed cable bundle channel has a smooth inward convex structure facing the turning side at the position where the prestressed cable bundle turns.

2. The prestressed wind turbine lattice tower column angle-changing component according to claim 1, characterized in that, The cross-section of the prestressed cable bundle channel at the smooth inner convex structure is a bell-shaped hole with one end larger than the other. The smaller end of the bell-shaped hole is an arc segment with a diameter larger than the diameter of the prestressed cable bundle. The smaller end of the bell-shaped hole faces the direction in which the prestressed cable bundle turns, and the shape of the bell-shaped hole gradually decreases from both ends of the smooth inner convex structure to the central hole, thus forming a smooth inner convex structure.

3. The prestressed wind turbine lattice tower column angle-changing component according to claim 2, characterized in that, The turning part (1) includes an outer steel pipe (11), an upper inner steel pipe (12) and a lower inner steel pipe (18) located at both ends inside the outer steel pipe (11), and an inner lining steel plate (13) located in the center inside the outer steel pipe (11). The upper inner steel pipe (12), the lower inner steel pipe (18) and the inner lining steel plate (13) enclose and form a prestressed cable bundle channel. A smooth inner convex structure is formed at the inner lining steel plate (13). Filler material is provided between the outer steel pipe (11) and the prestressed cable bundle channel.

4. The prestressed wind turbine lattice tower column angle-changing component according to claim 3, characterized in that, An inner ring plate is provided between the inner lining steel plate (13) and the outer steel pipe (11), and the inner ring plate is provided with a bell-shaped hole that matches the cross section of the inner lining steel plate (13).

5. The prestressed wind turbine lattice tower column angle-changing component according to claim 4, characterized in that, The inner ring plate is provided with three rings at intervals along the axial direction of the inner lining steel plate (13), namely the upper inner ring plate (14), the middle inner ring plate (15) and the lower inner ring plate (16). The bell-shaped hole on the middle inner ring plate (15) is smaller than the bell-shaped hole on the upper inner ring plate (14) and the lower inner ring plate (16).

6. The prestressed wind turbine lattice tower column angle-changing component according to claim 3, characterized in that, The outer steel pipe (11) is provided with a web member connecting part (4), and the web member connecting part (4) is provided with a longitudinal stiffening rib (110) at a corresponding position. The longitudinal stiffening rib (110) is located between the outer steel pipe (11) and the upper inner steel pipe (12), and between the outer steel pipe (11) and the lower inner steel pipe (18).

7. The prestressed wind turbine lattice tower column angle-changing component according to claim 1, characterized in that, Both the upper tower column connection part (2) and the lower tower column connection part (3) are flange connections used to connect with the tower column.

8. The prestressed wind turbine lattice tower column angle-changing component according to claim 3, characterized in that, The inner lining steel plate (13) has a smooth, convex structure with a low-friction plate (17).

9. A prestressed wind turbine lattice tower column angle-changing component according to claim 3, characterized in that, The center of the arc segment is located at the center of the inner ring plate.

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