Transition switching section structure for wind turbine generator tower and wind turbine generator tower

Abstract

The utility model discloses a transition switching section structure for a wind turbine generator tower and the wind turbine generator tower, which solve the problem of poor stability of the transition switching section structure of the traditional tower, and adopt the technical scheme that a plurality of split structures are spliced to form a structure with a round upper part and a round lower part, and the side part of each split structure is provided with a corner post seat; a steel tower connecting flange is arranged on the upper end face of the transition switching section and used for being connected with the steel tower section. A reinforcing flange is further arranged on the lower portion of the steel tower connecting flange, the reinforcing flange is composed of a plurality of split flanges, and each split flange is fixedly connected with a split structure to form an integrated structure. The inner side and the outer side of a splicing seam of the adjacent sectioning structures of the transition switching section are each provided with a batten, each batten is provided with double rows of connecting holes, and the positions, close to the splicing seam, of the adjacent sectioning structures of the transition switching section are each provided with a row of connecting holes. And splicing seams of the adjacent sectioning structures are clamped and fixedly connected by using double rows of high-strength fasteners and two battens.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wind power tower, concretely relates to a transition adapter segment structure for wind turbine tower and wind turbine tower. BACKGROUND

[0002] The statements in this section merely provide background information related to the utility model and do not necessarily constitute prior art.

[0003] In the field of wind power generation, the tower of high-rise structure plays a key role in supporting equipment and ensuring stable operation. The traditional tower structure has many shortcomings in dealing with complex wind field environment, limited land area and efficient maintenance requirements. The transition adapter segment connection structure in the common tower structure is composed of multiple split structure splicing, and the splicing position is directly fixed and connected by fasteners between adjacent split structures. Since the splicing position is the weak point of the structure, long-term stress concentration will cause structural deformation or fatigue failure, resulting in a decrease in the stability of the entire structure.

[0004] The common tower structure has a single form and is difficult to flexibly adapt to the spatial requirements of different wind fields. In the case of limited land area, the bottom root opening size cannot be effectively optimized. In order to increase the height of the tower, the size of the bottom root opening needs to be increased, resulting in low land utilization efficiency. At the same time, the existing transition adapter segment structure cannot guarantee that the wind turbine is not dusty under the condition of ensuring heat dissipation, which increases the difficulty and cost of maintenance. The connection method and structure of the traditional tower need to increase the size of the tower structure to improve the strength and stability, resulting in high production cost and installation difficulty. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model provides a transition adapter segment structure for wind turbine tower and wind turbine tower, which solves the problems of structural deformation and stability decline caused by direct splicing of the traditional transition adapter segment structure, and solves the problem that the traditional tower is difficult to flexibly adjust the size of the bottom root opening according to the land area of the wind field. Through full-section compression of the circular pipe concrete, the strength and ductility of the concrete are improved, and the seismic performance of the overall structure is enhanced.

[0006] In order to achieve the above purpose, the utility model is realized by the following technical scheme:

[0007] Firstly, the utility model provides a transition adapter segment structure for wind turbine tower, which comprises: multiple split structures; the inner side and the outer side of the splicing joint of adjacent split structures are provided with a batten, each batten is provided with double-row connecting holes, adjacent split structures are provided with a row of connecting holes near the splicing joint, and double-row fasteners and two battens are used to fixedly connect the splicing joint of adjacent split structures.

[0008] Alternatively, it may include: multiple segmented structures; each segmented structure has a clamping flange plate at its joint, the clamping flange plate is welded to the inner and outer sides of the joint of the segmented structure, the ends of the clamping flange plate are rounded, the clamping flange plate has a row of connecting holes, a sandwich steel plate is provided between the clamping flange plates of adjacent segmented structures, the sandwich steel plate also has a row of connecting holes, and the clamping flange plates and sandwich steel plates on adjacent segmented structures are fastened together using fasteners.

[0009] Furthermore, the transition section formed by splicing multiple segmented structures has an upper rounded shape and a lower squared shape, and corner post seats are provided on the side; a steel tower connecting flange is provided on the upper end face of the transition section for connecting the steel tower section; a reinforcing flange is also provided at the lower part of the steel tower connecting flange, and the reinforcing flange is composed of multiple segmented flanges, each of which is fixedly connected to a segmented structure to form an integral structure; a support platform is provided inside the transition section for maintaining the steel tower section.

[0010] Secondly, this utility model provides a wind turbine tower, comprising: a steel tower section, a transition section and a lattice section arranged sequentially from top to bottom;

[0011] The lattice segment includes corner posts, horizontal bars, and diagonal bars. The number of corner posts and corner post bases is the same. The corner posts form a truncated pyramid structure with the horizontal bars and diagonal bars respectively. Horizontal bar connecting sections and diagonal bar connecting sections are provided on the corner posts. Four horizontal bars are provided in the same plane. The two ends of each horizontal bar are fixedly connected to the horizontal bar connecting sections on two adjacent corner posts, forming a square horizontal support structure. The lattice segment has multiple layers of horizontal support structure along the axial direction of the corner posts. Four transverse diaphragms are also provided in the same layer of horizontal support structure. The two ends of each transverse diaphragm are connected to the K-shaped connecting sections in the middle of two adjacent horizontal bars respectively.

[0012] A diagonal connecting plate is provided in the middle of the crossbar. The diagonal connecting plate is composed of two steel plates. One end of the diagonal bar is fixedly connected to the diagonal connecting plate, and the other end is fixedly connected to the diagonal connecting joint on the corner post. Four diagonal bars are fixedly connected to each diagonal connecting plate. The four diagonal bars between adjacent crossbars along the axial direction of the corner post form a quadrilateral structure. The K-shaped connecting joint is provided on the diagonal connecting plate.

[0013] The upper end of the corner post is fixedly connected to the corner post base, and the lower end is connected to a fixed anchor; the core of the corner post is filled with concrete; the core of the corner post is provided with prestressed steel strands, the upper end of the prestressed steel strands is connected to the fixed anchor plate on the upper part of the corner post base, and the lower end is connected to the fixed anchor.

[0014] Furthermore, the crossbar between the two steel plates of the diagonal connecting plate has multiple mounting holes, and cylindrical support members are installed in the mounting holes. The K-shaped connecting section, the diagonal connecting plate, and the crossbar are fixedly connected by fasteners. The cylindrical support members are used to prevent the crossbar from deforming. The number of cylindrical support members, mounting holes, and fasteners is the same.

[0015] Furthermore, the crossbar connecting section is made of two steel plates; the crossbar is a square steel pipe, and both ends are provided with a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are both composed of two rectangular steel plates, and the first connecting plate and the second connecting plate are arranged opposite to each other on the side wall of the crossbar.

[0016] Furthermore, one end of the two rectangular steel plates of the first connecting plate is clamped and fixed to the inner and outer sides of the side wall of the crossbar, and a thickening plate is provided thereon; the other end is clamped and fixed to one of the steel plates of the crossbar connecting section by fasteners. One end of the two rectangular steel plates of the second connecting plate is clamped and fixed to the inner and outer sides of the side wall of the crossbar by fasteners, and a thickening plate is provided thereon; the other end is clamped and fixed to the other steel plate of the crossbar connecting section by fasteners.

[0017] Furthermore, the diagonal brace connecting section is made of a single layer of steel plate; the diagonal brace is a square steel pipe, and one end of the diagonal brace is provided with a third connecting plate and a fourth connecting plate. The third connecting plate and the fourth connecting plate are each composed of two rectangular steel plates, and two thickening plates are provided between the two rectangular steel plates. One end of the two rectangular steel plates of the third connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace; one end of the two rectangular steel plates of the fourth connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace by fasteners. The third connecting plate and the fourth connecting plate are clamped and installed on the diagonal brace connecting section.

[0018] The other end of the diagonal brace is provided with a first connecting plate and a second connecting plate. One end of the two rectangular steel plates of the first connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace, and a thickening plate is provided. The other end is clamped and fixed to one of the steel plates of the diagonal brace connecting plate by fasteners. One end of the two rectangular steel plates of the second connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace by fasteners, and a thickening plate is provided. The other end is clamped and fixed to the other steel plate of the diagonal brace connecting plate by fasteners.

[0019] Furthermore, a plug-in rod is provided between the uppermost horizontal support structure and the transition section. The plug-in rod is a square steel pipe, and one end of the plug-in rod is provided with a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are arranged opposite to each other on the side wall of the plug-in rod. One end of the two rectangular steel plates of the first connecting plate is clamped and fixed to the inner and outer sides of the side wall of the plug-in rod and is provided with a thickening plate. The other end is clamped and fixed to one of the steel plates of the inclined connecting plate by fasteners. One end of the two rectangular steel plates of the second connecting plate is clamped and fixed to the inner and outer sides of the side wall of the plug-in rod by fasteners and is provided with a thickening plate. The other end is clamped and fixed to the other steel plate of the inclined connecting plate by fasteners.

[0020] The other end of the plug rod is provided with a plug joint. Two sets of cylindrical support structures are symmetrically arranged on both sides of the plug joint. Each set of cylindrical support structures includes two clamping plates, and several cylinders are arranged between the two clamping plates. The plug joint of the plug rod is inserted into the skirt of the transition section, and the plug rod, the two sets of cylindrical support structures and the transition section are fixedly connected by fasteners.

[0021] Furthermore, the corner post is composed of multiple round tubes, and each round tube has a corner post flange at its end. Adjacent corner post flanges are connected by fasteners or grooved rivets.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are:

[0023] The connection method of the segmented structure of the transition section of this utility model, whether using strips and double-row high-strength fasteners or single-row holes and steel bars, has high connection strength and reliability, ensuring the integrity and stability of the tower structure. The support platform set inside the transition section provides a reliable working platform for the maintenance of the steel tower section, facilitating maintenance personnel to carry out inspection and maintenance work, reducing maintenance time and labor costs, and improving the maintainability of the equipment.

[0024] This invention utilizes a top-to-bottom arrangement of steel tower sections, transition sections, and lattice sections. This allows for flexible adjustment of the bottom and top root openings of the lattice sections based on the land area acquired for the wind farm. With limited land resources, this enables efficient tower arrangement, improving the space utilization efficiency of the wind farm and reducing land costs. The horizontal bar connecting sections employ a double-plate clamping and thickened plate structure to connect with the horizontal bars. The diagonal bar connecting sections use a specific connection method with the diagonal bars, and the diagonal bars and corner columns form a reasonable "K"-shaped structure, ensuring uniform geometric stress and significantly improving stability. The corner columns use a combination of round tubes and concrete, and are equipped with prestressed steel strands. Under prestress, the bending mode of the single tower changes, and the entire concrete section is under compression, improving the concrete strength and ductility, significantly enhancing the overall structure's seismic performance, and reducing the risk of damage to the tower from natural disasters such as earthquakes. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0026] Figure 1 This is an overall structural diagram of the transition section of this utility model;

[0027] Figure 2 This is a structural diagram of the internal structure of the transition section of this utility model;

[0028] Figure 3 This is a structural diagram of the segmented structure of this utility model;

[0029] Figure 4 This is a structural diagram of the clamping flange plate and sandwich steel plate of this utility model;

[0030] Figure 5 This is a schematic diagram of the overall structure of the lattice-type wind turbine tower of this utility model;

[0031] Figure 6 This is a structural diagram of the lattice segment of this utility model;

[0032] Figure 7 This is a top view of the lattice segment of this utility model;

[0033] Figure 8 This is a radial cross-sectional view of the corner column structure of this utility model;

[0034] Figure 9 This is a structural diagram of the crossbar of this utility model;

[0035] Figure 10 This is a partial structural diagram of the end of the crossbar of this utility model;

[0036] Figure 11 This is a structural diagram of the connection between the diagonal bar and the corner post of this utility model;

[0037] Figure 12 This is a partial structural diagram of the end of the inclined rod of this utility model;

[0038] Figure 13 This is a structural diagram showing the connection between the crossbar, diagonal bar, diaphragm, and diagonal bar connecting plate of this utility model.

[0039] Figure 14 This is a structural diagram of the inclined rod connecting plate and cylindrical support component of this utility model;

[0040] Figure 15 This is a structural diagram showing the arrangement of prestressed steel strands in the lattice section of this utility model;

[0041] Figure 16 This is a structural diagram of the plug-in rod of this utility model;

[0042] Figure 17 This is a structural diagram of the transition section and plug-in rod of this utility model.

[0043] In the diagram: 1. Transition section; 1-1. Split structure; 1-2. Corner column base; 1-3. Steel tower connecting flange; 1-4. Support platform; 1-5. Reinforcing flange; 1-6. Slats; 1-7. Wedge flange plate; 1-8. Sandwich steel plate; 2. Steel tower section; 3. Lattice section; 4. Circular pipe; 5. Diagonal brace; 6. Corner column; 7. Horizontal bar; 8. Insert rod; 9. Diaphragm; 10. Diagonal brace connecting joint; 11. Concrete; 12. Diagonal brace connecting plate; 13. First connecting plate; 14. Second connecting plate; 15. Thickening plate; 16. Third connecting plate; 17. Fourth connecting plate; 18. K-shaped connecting joint; 19. Column support; 20. Fixed anchor plate; 21. Prestressed steel strand; 22. Fixed anchor; 23. Insert joint; 24. Column support structure. Detailed Implementation

[0044] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] Example 1

[0047] This embodiment provides a transition section structure for wind turbine towers, such as... Figures 1-3 As shown, the transition section 1 comprises four segmented structures 1-1 joined together, forming a rounded upper section with a square lower section. Each segmented structure 1-1 has a corner post 1-2 on its side. A steel tower connecting flange 1-3 is provided on the upper surface of the transition section 1 for connecting the steel tower section. A reinforcing flange 1-5 is also provided at the lower part of the steel tower connecting flange 1-3. The reinforcing flange 1-5 is composed of four segmented flanges, each of which is fixedly connected to one segmented structure 1-1 as an integral structure. A support platform 1-4 is provided inside the transition section 1 for maintaining the steel tower section.

[0048] A strip 1-6 is provided on both the inner and outer sides of the splice seam of the adjacent segment structure 1-1 of the transition section 1. Each strip 1-6 has a double row of connecting holes. A row of connecting holes is provided near the splice seam of the adjacent segment structure 1-1 of the transition section 1. The splice seam of the adjacent segment structure 1-1 is clamped and fixed by double rows of high-strength fasteners and two strips 1-6.

[0049] Example 2

[0050] This embodiment provides a transition section structure for wind turbine towers, comprising: the transition section 1 is composed of four segmented structures 1-1 spliced ​​together, forming an upper round and lower square structure, with a corner post 1-2 provided on the side of each segmented structure 1-1; a steel tower connecting flange 1-3 is provided on the upper end face of the transition section 1 for connecting the steel tower section; a reinforcing flange 1-5 is also provided at the lower part of the steel tower connecting flange 1-3, the reinforcing flange 1-5 being composed of four segmented flanges, each segmented flange being fixedly connected to one segmented structure 1-1 as an integral structure; and a support platform 1-4 is provided inside the transition section 1 for maintaining the steel tower section;

[0051] like Figure 4 As shown, a clamping flange plate 1-7 is provided at the joint of each of the segmented structures 1-1. The clamping flange plate 1-7 is welded to the inner and outer sides of the joint of the segmented structures 1-1. The end of the clamping flange plate 1-7 is rounded. The clamping flange plate 1-7 is provided with a row of connecting holes. A sandwich steel plate 1-8 is provided between the clamping flange plates 1-7 of adjacent segmented structures 1-1. The sandwich steel plate 1-8 is also provided with a row of connecting holes. The clamping flange plates 1-7 and sandwich steel plates 1-8 on adjacent segmented structures 1-1 are fastened together using high-strength fasteners.

[0052] Example 3

[0053] This embodiment provides a wind turbine tower, such asFigures 5-17 As shown, it includes: steel tower section 2, transition section 1 and lattice section 3 arranged sequentially from top to bottom;

[0054] The lattice section 3 includes four corner posts 6, several horizontal bars 7, and diagonal bars 5. The four corner posts 6 form a truncated pyramid structure with the horizontal bars 7 and diagonal bars 5 respectively. The size of the bottom root opening of the lattice section 3 is generally determined according to the land area acquired by the wind farm. The overall frame is controlled within a 25*25m square land area, with the bottom root opening ranging from 12 to 20m. The size of the upper root opening is generally controlled within the range of 5.5 to 6.5m. The corner posts 6 are provided with horizontal bar 7 connecting sections and diagonal bar connecting sections 10. Four horizontal bars 7 are provided in the same plane. The two ends of the horizontal bars 7 are fixedly connected to the horizontal bar 7 connecting sections on the two adjacent corner posts 6 respectively, forming a square horizontal support structure. The lattice section 3 is provided with multiple layers of horizontal support structure along the axial direction of the corner posts 6. In the same layer of horizontal support structure, four transverse diaphragms 9 are also provided. The two ends of each transverse diaphragm are connected to the K-shaped connecting sections 18 in the middle of the two adjacent horizontal bars 7 respectively.

[0055] A diagonal connecting plate 12 is provided in the middle of the crossbar 7. The diagonal connecting plate 12 is composed of two steel plates. One end of the diagonal rod 5 is fixedly connected to the diagonal connecting plate 12, and the other end is fixedly connected to the diagonal connecting joint 10 on the corner post 6. Four diagonal rods 5 are fixedly connected on each diagonal connecting plate 12. The four diagonal rods 5 between adjacent crossbars 7 along the axial direction of the corner post 6 form a quadrilateral structure. The K-shaped connecting joint 18 is provided on the diagonal connecting plate 12.

[0056] The upper end of the corner post 6 is fixedly connected to the corner post base 1-2, and the lower end is connected to a fixed anchor 22; the core of the corner post 6 is provided with a prestressed steel strand 21, the upper end of the prestressed steel strand 21 is connected to the fixed anchor plate 20 on the upper part of the corner post base 1-2, and the lower end is connected to the fixed anchor 22.

[0057] During on-site installation of prestressed steel strands 21, the fixed-end anchorages are installed with the steel strands to form a complete cable bundle, ensuring that the prestressed steel strands 21 do not twist or entangle. The main crane is used to guide the entire cable bundle into the corner column 6 until the fixed-end anchorage is placed on the anchor plate at the top of the corner column base 1-2. Within the foundation, the steel strands are sequentially passed through the bottom anchorage, ensuring that the strands do not become tangled. The two bundles are tensioned simultaneously in a symmetrical sequence until the required control cable force is reached. After completion, excess steel strands are cut off. Corrosion protection is applied to the upper fixed-end anchorage, the bottom tensioning-end anchorage, and the exposed steel strands of the lattice tower, and external protective caps are installed.

[0058] The lower part of the steel tower connecting flange 1-3 is also provided with a reinforcing flange 1-5, which is composed of four segmented flanges. Each segmented flange is fixedly connected to a segmented structure 1-1 to form an integral structure.

[0059] The crossbar 7 between the two steel plates of the diagonal connecting plate 12 has multiple mounting holes, and a cylindrical support 19 is provided in the mounting holes. The K-shaped connecting section 18, the diagonal connecting plate 12 and the crossbar 7 are fixedly connected by fasteners. The cylindrical support 19 is used to prevent the crossbar 7 from deforming.

[0060] The cylindrical support 19 has the same number of mounting holes and fasteners.

[0061] The crossbar 7 connecting section is made of two steel plates; the crossbar 7 is a square steel pipe, and the square steel pipe (0.2*0.2m) and the crossbar 7 connecting section are butted with unequal thickness. The butt joint is connected by a double plate clamping and thickening plate 15 structure. Both ends of the crossbar 7 are provided with a first connecting plate 13 and a second connecting plate 14. The first connecting plate 13 and the second connecting plate 14 are both composed of two rectangular steel plates. The first connecting plate 13 and the second connecting plate 14 are arranged opposite to each other on the side wall of the crossbar 7.

[0062] One end of the two rectangular steel plates of the first connecting plate 13 is clamped and fixed to the inner and outer sides of the side wall of the crossbar 7, and a thickening plate 15 is provided. The other end is clamped and fixed to one of the steel plates of the connecting section of the crossbar 7 by fasteners. One end of the two rectangular steel plates of the second connecting plate 14 is clamped and fixed to the inner and outer sides of the side wall of the crossbar 7 by fasteners, and a thickening plate 15 is provided. The other end is clamped and fixed to the other steel plate of the connecting section of the crossbar 7 by fasteners.

[0063] The diagonal connecting section 10 is made of a single layer of steel plate; the diagonal rod 5 is a square steel pipe, and one end of the diagonal rod 5 is provided with a third connecting plate 16 and a fourth connecting plate 17. The third connecting plate 16 and the fourth connecting plate 17 are each composed of two rectangular steel plates, and two thickening plates 15 are provided between the two rectangular steel plates. One end of the two rectangular steel plates of the third connecting plate 16 is clamped and fixed to the inner and outer sides of the side wall of the diagonal rod 5; one end of the two rectangular steel plates of the fourth connecting plate 17 is clamped and fixed to the diagonal rod by fasteners. The third connecting plate 16 and the fourth connecting plate 17 are clamped and installed on the diagonal connecting section 10 on the inner and outer sides of the side wall of the diagonal rod 5. Since the square tube (0.26*0.26m) of the diagonal rod 5 and the diagonal connecting section 10 are butted with unequal thickness, two diagonal rods 5 are set on the same diagonal connecting section 10, and form a "K" shape structure with the corner column 6. The axes of the two diagonal rods 5 intersect with the main axis of the corner column 6, and the geometric force is uniform. The diagonal rods 5 and the diagonal connecting section 10 are connected by a double plate clamping and thickening plate 15 structure.

[0064] The square steel pipe (0.26*0.26m) of the diagonal rod 5 and the diagonal rod connecting plate 12 are connected with unequal thickness. The connection adopts a double plate clamping and thickening plate 15 structure. The other end of the diagonal rod 5 is provided with a first connecting plate 13 and a second connecting plate 14. One end of the two rectangular steel plates of the first connecting plate 13 is clamped and fixed to the inner and outer sides of the side wall of the diagonal rod 5 and is provided with a thickening plate 15. The other end is clamped and fixed to one of the steel plates of the diagonal rod connecting plate 12 by fasteners. One end of the two rectangular steel plates of the second connecting plate 14 is clamped and fixed to the inner and outer sides of the side wall of the diagonal rod 5 by fasteners and is provided with a thickening plate 15. The other end is clamped and fixed to the other steel plate of the diagonal rod connecting plate 12 by fasteners.

[0065] A connector rod 8 is provided between the uppermost horizontal support structure and the transition section 1. The connector rod 8 is a square steel pipe. One end of the connector rod 8 is provided with a first connecting plate 13 and a second connecting plate 14. The first connecting plate 13 and the second connecting plate 14 are arranged opposite to each other on the side wall of the connector rod 8. One end of the two rectangular steel plates of the first connecting plate 13 is clamped and fixed to the inner and outer sides of the side wall of the connector rod 8 and is provided with a thickening plate 15. The other end is clamped and fixed to one of the steel plates of the inclined connecting plate 12 by fasteners. One end of the two rectangular steel plates of the second connecting plate 14 is clamped and fixed to the inner and outer sides of the side wall of the connector rod 8 by fasteners and is provided with a thickening plate 15. The other end is clamped and fixed to the other steel plate of the inclined connecting plate 12 by fasteners.

[0066] The other end of the plug rod 8 is provided with a plug joint 23. Two sets of cylindrical support structures 24 are symmetrically arranged on both sides of the plug joint 23. Each set of cylindrical support structures 24 includes two clamping plates, and several cylinders are arranged between the two clamping plates. The plug joint 23 of the plug rod 8 is inserted into the skirt seat of the transition section 1, and the plug rod 8, the two sets of cylindrical support structures 24 and the transition section 1 are fixedly connected by fasteners.

[0067] The corner post 6 is composed of multiple circular tubes 4, each with a corner post flange at its end. Adjacent corner post flanges are connected by high-strength fasteners or grooved rivets. The core of the corner post 6 is filled with concrete 11. The filling thickness of the concrete 11 (C80) is 0.2-0.3m, and the filling method can be vertical cast-in-place or horizontal centrifugal filling. Sealing plates are installed at the upper and lower ends of each circular tube 4 to make the concrete 11 flush with the sealing surface of the corner post flange. In vertical cast-in-place construction: a steel liner is installed inside the circular tube 4, and support plates are evenly distributed between the circular tube 4 and the liner according to the length of a single corner post 6 to bind and support the filling concrete 11, ensuring that the concrete 11 and the steel tube are coaxial after molding.

[0068] The combination of circular tube 4 and concrete 11, relying on the advantages of cross-sectional material distribution, effectively improves the utilization rate of material strength, reduces the wall thickness of circular tube 4, and reduces the amount of steel used. Under prestressing, the bending mode of a single tower is transformed into the axial force of the corner column members, causing the entire cross-section of circular tube 4 and concrete 11 to be under compression, improving the strength and ductility of concrete 11, and resulting in strong seismic resistance of the overall structure. At the same time, the tensile force generated by the bending moment is borne by the prestressing tendons.

[0069] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A transition section structure for wind turbine towers, characterized in that, include: Multiple segmented structures; a strip is provided on the inner and outer sides of the splicing seam of adjacent segmented structures, and each strip is provided with double rows of connecting holes. A row of connecting holes is provided near the splicing seam of adjacent segmented structures, and the splicing seam of adjacent segmented structures is fixedly connected by double rows of fasteners and two strips.

2. A transition section structure for wind turbine towers, characterized in that, include: Multiple segmented structures are provided; a clamping flange plate is provided at the splicing seam of each segmented structure. The clamping flange plate is welded to the inner and outer sides of the splicing seam of the segmented structure. The end of the clamping flange plate is rounded. The clamping flange plate is provided with a row of connecting holes. A sandwich steel plate is provided between the clamping flange plates of adjacent segmented structures. The sandwich steel plate is also provided with a row of connecting holes. The clamping flange plates and sandwich steel plates on adjacent segmented structures are fastened together using fasteners.

3. A transition section structure for a wind turbine tower as described in claim 1 or 2, characterized in that, The transition section, formed by splicing multiple segmented structures, has an upper rounded shape and a lower squared shape, and is provided with corner post seats on the side; a steel tower connecting flange is provided on the upper end face of the transition section for connecting the steel tower section; a reinforcing flange is also provided at the lower part of the steel tower connecting flange, and the reinforcing flange is composed of multiple segmented flanges, each of which is fixedly connected to a segmented structure to form an integral structure; a support platform is provided inside the transition section for maintaining the steel tower section.

4. A wind turbine tower, characterized in that, include: As described in claim 3, a transition section structure, a steel tower section, and a lattice section for a wind turbine tower are provided sequentially from top to bottom; The lattice segment includes corner posts, horizontal bars, and diagonal bars. The number of corner posts and corner post bases is the same. The corner posts form a truncated pyramid structure with the horizontal bars and diagonal bars respectively. Horizontal bar connecting sections and diagonal bar connecting sections are provided on the corner posts. Four horizontal bars are provided in the same plane. The two ends of each horizontal bar are fixedly connected to the horizontal bar connecting sections on two adjacent corner posts, forming a square horizontal support structure. The lattice segment has multiple layers of horizontal support structure along the axial direction of the corner posts. Four transverse diaphragms are also provided in the same layer of horizontal support structure. The two ends of each transverse diaphragm are connected to the K-shaped connecting sections in the middle of two adjacent horizontal bars respectively. A diagonal connecting plate is provided in the middle of the crossbar. The diagonal connecting plate is composed of two steel plates. One end of the diagonal bar is fixedly connected to the diagonal connecting plate, and the other end is fixedly connected to the diagonal connecting joint on the corner post. Four diagonal bars are fixedly connected to each diagonal connecting plate. The four diagonal bars between adjacent crossbars along the axial direction of the corner post form a quadrilateral structure. The K-shaped connecting joint is provided on the diagonal connecting plate. The upper end of the corner post is fixedly connected to the corner post base, and the lower end is connected to a fixed anchor; the core of the corner post is filled with concrete; the core of the corner post is provided with prestressed steel strands, the upper end of the prestressed steel strands is connected to the fixed anchor plate on the upper part of the corner post base, and the lower end is connected to the fixed anchor.

5. A wind turbine tower as described in claim 4, characterized in that, The crossbar between the two steel plates of the diagonal connecting plate has multiple mounting holes, and cylindrical support members are installed in the mounting holes. The K-shaped connecting section, the diagonal connecting plate, and the crossbar are fixedly connected by fasteners. The cylindrical support members are used to prevent the crossbar from deforming. The number of cylindrical support members, mounting holes, and fasteners is the same.

6. A wind turbine tower as described in claim 4, characterized in that, The crossbar connecting section is made of two steel plates; the crossbar is a square steel pipe, and both ends are provided with a first connecting plate and a second connecting plate. The first connecting plate and the second connecting plate are both composed of two rectangular steel plates, and the first connecting plate and the second connecting plate are arranged opposite to each other on the side wall of the crossbar.

7. A wind turbine tower as described in claim 6, characterized in that, One end of the two rectangular steel plates of the first connecting plate is clamped and fixed to the inner and outer sides of the side wall of the crossbar, and a thickening plate is provided. The other end is clamped and fixed to one of the steel plates of the crossbar connecting section by fasteners. One end of the two rectangular steel plates of the second connecting plate is clamped and fixed to the inner and outer sides of the side wall of the crossbar by fasteners, and a thickening plate is provided. The other end is clamped and fixed to the other steel plate of the crossbar connecting section by fasteners.

8. A wind turbine tower as described in claim 6, characterized in that, The diagonal brace connector is made of a single layer of steel plate; the diagonal brace is a square steel pipe, and one end of the diagonal brace is provided with a third connecting plate and a fourth connecting plate. The third connecting plate and the fourth connecting plate are each composed of two rectangular steel plates, and two thickening plates are provided between the two rectangular steel plates. One end of the two rectangular steel plates of the third connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace; one end of the two rectangular steel plates of the fourth connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace by fasteners. The third connecting plate and the fourth connecting plate are clamped and installed on the diagonal brace connector. The other end of the diagonal brace is provided with a first connecting plate and a second connecting plate. One end of the two rectangular steel plates of the first connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace, and a thickening plate is provided. The other end is clamped and fixed to one of the steel plates of the diagonal brace connecting plate by fasteners. One end of the two rectangular steel plates of the second connecting plate is clamped and fixed to the inner and outer sides of the side wall of the diagonal brace by fasteners, and a thickening plate is provided. The other end is clamped and fixed to the other steel plate of the diagonal brace connecting plate by fasteners.

9. A wind turbine tower as described in claim 8, characterized in that, A plug-in rod is provided between the uppermost horizontal support structure and the transition section. The plug-in rod is a square steel pipe. One end of the plug-in rod is provided with a first connecting plate and a second connecting plate, which are arranged opposite to each other on the side wall of the plug-in rod. One end of the two rectangular steel plates of the first connecting plate is clamped and fixed to the inner and outer sides of the side wall of the plug-in rod and is provided with a thickening plate. The other end is clamped and fixed to one of the steel plates of the inclined connecting plate by fasteners. One end of the two rectangular steel plates of the second connecting plate is clamped and fixed to the inner and outer sides of the side wall of the plug-in rod by fasteners and is provided with a thickening plate. The other end is clamped and fixed to the other steel plate of the inclined connecting plate by fasteners. The other end of the plug rod is provided with a plug joint. Two sets of cylindrical support structures are symmetrically arranged on both sides of the plug joint. Each set of cylindrical support structures includes two clamping plates, and several cylinders are arranged between the two clamping plates. The plug joint of the plug rod is inserted into the skirt of the transition section, and the plug rod, the two sets of cylindrical support structures and the transition section are fixedly connected by fasteners.

10. A wind turbine tower as described in claim 4, characterized in that, The corner post is composed of multiple round tubes, and each round tube has a corner post flange at its end. Adjacent corner post flanges are connected by fasteners or grooved rivets.

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