Offshore wind power tower cylinder anti-deformation support device and construction method thereof

Abstract

This application relates to the field of wind turbine tower technology, specifically disclosing a deformation-resistant support device for offshore wind turbine towers and its construction method. Each section of the wind turbine tower includes a welded cylinder and forged flanges at both ends, with multiple bolt holes on the flanges. The support device includes a first support rod, multiple connecting members, and an inner support rod. The first support rod includes a first rod body and two first ends. The first rod body gradually expands from both ends towards the middle, and the two first ends are welded to both ends of the first rod body. Each first end has one or more first through holes. The connecting members pass through the mating bolt holes and the first through holes, enabling the first support rod to simultaneously support the two flanges of two adjacent wind turbine towers, resulting in synchronous deformation of the two mating flanges and high mating accuracy. The inner support rod is supported inside the welded cylinder, enhancing the support for the wind turbine tower. The first rod body has a structure that gradually expands from both ends towards the middle, giving it greater bending strength compared to strip-shaped or uniformly cylindrical rods.

Description

Technical Field

[0001] This application relates to the field of wind turbine tower technology, and more specifically, to an anti-deformation support device for offshore wind turbine towers and its construction method. Background Technology

[0002] The wind turbine tower primarily serves a supporting function in wind turbine generator sets, while also absorbing vibrations from the generator. A wind turbine tower is typically composed of several sections of the tower connected by flanges.

[0003] The general production process of wind turbine towers is as follows: a plate rolling machine rolls flat steel plates into cylinders, longitudinal seams are welded, and roundness is checked. If there are any problems, a second roundness check is performed. After the welding of a single cylinder section is completed, multiple cylinders are driven to be butt-welded together, and the inner and outer circumferential seams are welded to obtain a section of cylinder. Flanges are then welded to both ends of this section of cylinder. Non-destructive testing and flatness checks are performed on the welds. After sandblasting and painting, the internal components are installed and the finished product is inspected to obtain a section of wind turbine tower. After being stored for a period of time, it is transported to the installation site.

[0004] Wind turbine towers are typically stored horizontally for periods ranging from a few days to several months. The tower diameter is generally 4 to 10 meters. Due to their large diameter and weight, they are prone to slight sagging and deformation after prolonged storage, leading to deformation of the end flanges and misalignment with the flanges of other wind turbine tower sections, causing installation difficulties.

[0005] Currently, some measures to improve the deformation of wind turbine towers during storage include installing a cross-shaped support on the end face. Each leg of this cross-shaped support has a multi-segment structure connected by bolts. Each segment is a sheet-like or L-shaped structure, making the overall structure relatively complex. Furthermore, each segment is prone to deformation, and the segments are also prone to sliding, twisting, and deformation, resulting in weak support function. Summary of the Invention

[0006] To address the current issues of complex structures, easy deformation, and weak support functions in some existing support devices for preventing wind turbine tower deformation, this application proposes a simple, non-deformable, and highly capable anti-deformation support device for offshore wind turbine towers, along with its construction method.

[0007] In the first aspect, this application proposes an anti-deformation support device for offshore wind turbine towers, and adopts the following technical solution.

[0008] A deformation-resistant support device for offshore wind turbine towers includes a welded cylinder and flanges welded to both ends of the welded cylinder, with multiple bolt holes on the flanges. The support device includes a first support rod for connecting the flanges of two adjacent wind turbine towers and multiple connecting members, as well as multiple inner support rods for supporting the welded cylinder in the diametrical direction. The first support rod includes a first rod body and two first ends; the first rod body has a structure that gradually expands from both ends to the middle; the two first ends are welded to both ends of the first rod body; each first end has two parallel side planes that can fit against two adjacent flanges; one or more first through holes are formed between the two side planes to align with the bolt holes of two adjacent flanges; the connecting members can pass through the aligning bolt holes and the first through holes, so that the first rod body is positioned in the diametrical direction of the flange.

[0009] By adopting the above technical solution, the first support rod can simultaneously support the two flanges of two adjacent wind turbine towers, allowing the two flanges to deform synchronously. Even after deformation, the shapes of the two mating flanges are basically the same, resulting in high mating accuracy during subsequent installation. The inner support rod, positioned along the internal diameter of the welded cylinder, further enhances the support force of the device on the wind turbine tower, minimizing tower deformation. The first rod has a structure that gradually expands from both ends towards the middle, giving it greater bending strength compared to strip-shaped or uniformly cylindrical rods. Positioned along the diameter of the flange, the first rod can be installed vertically to resist flange deformation due to gravity and reduce the amount of deformation.

[0010] As an improvement to the deformation-resistant support device for offshore wind turbine towers, both ends of the first rod are curved surfaces that can fit the inner annular surfaces of the two flanges; each of the first ends is welded to the middle of one end face of the first rod and can be clamped by the two adjacent flanges.

[0011] By adopting the above technical solution, both ends of the first rod can be closely supported on the inner ring surfaces of the two flanges, which not only improves the support force on the two flanges but also further improves the synchronous deformation of the two flanges.

[0012] As a preferred embodiment of the anti-deformation support device for the offshore wind turbine tower, the curved surfaces at both ends of the first rod are divided into a left curved surface and a right curved surface by the first end; the width of the left curved surface is greater than or equal to the thickness of one flange; the width of the right curved surface is greater than or equal to the thickness of one flange.

[0013] By adopting the above technical solution, both the left and right curved surfaces can fully support the inner ring surface of a flange, providing strong support for both flanges, resulting in minimal flange deformation, and the deformation of the two flanges is almost synchronous and identical.

[0014] As a preferred embodiment of the anti-deformation support device for the offshore wind turbine tower, the diameter of the middle part of the first rod is 1.8 to 2.2 times the radial dimension of both ends of the first rod.

[0015] By adopting the above technical solution, the first rod has the strongest bending resistance in large-diameter wind turbine tower structures.

[0016] As a preferred embodiment of the anti-deformation support device for the offshore wind turbine tower, three first penetration holes are provided at each first end, and the three first penetration holes are distributed in an arc shape equivalent to the flange amplitude.

[0017] By adopting the above technical solution, each end can be connected to the flange through the three first through holes, which improves the torsional resistance of the first rod relative to the flange.

[0018] As a preferred embodiment of the anti-deformation support device for offshore wind turbine towers, an inner support rod is provided in each adjacent welded cylinder; the inner support rod is located near the flange and in the diametrical direction of the welded cylinder.

[0019] By adopting the above technical solution, the welded cylinder near the flange is also supported, which reduces the pressure on the flange, thereby reducing the flange deformation and improving the accuracy of flange connection.

[0020] As a preferred embodiment of the anti-deformation support device for offshore wind turbine towers, the inner support rod includes an upper arc-shaped plate, an upper mounting block, an upper shaft, a lower shaft, a lower mounting block, and a lower arc-shaped plate. The curvature of the upper arc-shaped plate and the lower arc-shaped plate is adapted to the curvature of the welded cylinder; the upper mounting block is fixed to the inner surface of the upper arc-shaped plate; the upper mounting block has a spherical groove; one end of the upper shaft is spherical, which is adapted to be inserted into the spherical groove, and can rotate freely but cannot be pulled out of the spherical groove; the other end of the upper shaft is provided with an external thread; one end of the lower shaft is provided with an internal thread adapted to the external thread; the other end of the lower shaft is spherical, which is adapted to be embedded in the lower mounting block, and can rotate freely in the lower mounting block but cannot be pulled out; the lower mounting block is fixed to the inner surface of the lower arc-shaped plate; when the upper shaft is connected to the lower shaft by a thread, adjusting the distance between the upper shaft and the lower shaft allows the upper arc-shaped plate and the lower arc-shaped plate to respectively abut against the inner surface of the welded cylinder, and the line connecting the upper shaft and the lower shaft is located in the diametrical direction of the inner cylinder.

[0021] By adopting the above technical solution, adjusting the distance between the upper and lower shafts allows the upper and lower arc-shaped plates to respectively abut against the inner surface of the welded cylinder, making installation and disassembly very convenient. When disassembling the inner support rod, the distance between the upper and lower shafts can be shortened by rotation, allowing the inner support rod to be removed.

[0022] As a further improvement to the anti-deformation support device for offshore wind turbine towers, the support device further includes a second support rod and a third support rod, which are arranged parallel to each other on both sides of the first support rod; the second support rod and the third support rod have symmetrical structures, both of which have a structure that gradually expands from both ends to the middle; the two ends of the second support rod are configured to be fixed to two adjacent flanges; the two ends of the third support rod are configured to be fixed to two adjacent flanges.

[0023] By adopting the above technical solution, the symmetrical second and third support rods further strengthen the support force on the wind turbine tower, reduce the deformation of the flange, and improve the docking accuracy of the relative flanges.

[0024] As a preferred embodiment of the anti-deformation support device for offshore wind turbine towers, the second support rod includes a second rod body and two second ends; the second rod body has a structure that gradually expands from both ends to the middle; the two second ends are welded to both ends of the second rod body; each second end has two parallel side planes, and multiple second through holes are opened between the two side planes; after the multiple second through holes are aligned with the multiple bolt holes of the two wind turbine towers, the connecting piece can pass through one bolt hole, one second through hole and another bolt hole, so that the second rod body is on the non-diameter chord of the flange.

[0025] By adopting the above technical solution, the second support rod and the first support rod have similar structures and strong bending resistance. The difference is that the second support rod is located on the non-diameter chord of the flange, while the first support rod is located on the diameter chord of the flange. They work together to support the flange and consolidate the roundness of the flange.

[0026] Secondly, this application also proposes a construction method for an anti-deformation support device for offshore wind turbine towers, and adopts the following technical solution.

[0027] A construction method for an anti-deformation support device for offshore wind turbine towers as described above, the construction method comprising:

[0028] Multiple wind turbine tower sections are laid flat in a line with spacing between them. The first support rod is inserted between two adjacent wind turbine tower sections. The wind turbine tower sections are moved so that the two adjacent wind turbine tower sections clamp the two first ends of the first support rod.

[0029] Take multiple of the aforementioned connecting parts, each of the aforementioned connecting parts passing through the front and rear bolt holes and the first through hole in the middle;

[0030] The inner support rod is placed inside the welded cylinder.

[0031] By adopting the above technical solution, the first support rod is clamped between two adjacent wind turbine towers and connected and fixed in series using connectors. The flange deformation of the two wind turbine towers is synchronized, ensuring precise alignment during subsequent installation even after deformation. This construction method is simple and offers significant improvements.

[0032] In summary, compared with existing related technologies, this application has the following beneficial effects:

[0033] The first support rod can simultaneously support the two flanges of the two adjacent wind turbine towers, so that the two flanges deform synchronously. Even after deformation, the shapes of the two flanges are basically the same, and the docking accuracy is high.

[0034] The addition of an internal support rod in the direction of the welded cylinder's internal diameter further improves the device's support force on the wind turbine tower, resulting in less deformation of the wind turbine tower.

[0035] The first rod, the second rod, and the third rod all have an enlarged middle section, which gives them greater bending strength compared to rods with strip, column, or L-shaped cross sections.

[0036] Both ends of the first rod can be fitted to the inner ring surfaces of the two flanges, which not only improves the support force on the two flanges but also further improves the synchronous deformation of the two flanges. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a set of anti-deformation support devices for offshore wind turbine towers.

[0038] Figure 2 It is a schematic diagram of three wind turbine towers laid flat in sequence and connected in a line.

[0039] Figure 3 yes Figure 2 A schematic diagram of the structure of a wind turbine tower.

[0040] Figure 4 yes Figure 3 An enlarged view of area A of the wind turbine tower.

[0041] Figure 5 yes Figure 2 The diagram shows the structure of a section of a wind turbine tower on which the supporting devices of this application are installed.

[0042] Figure 6 yes Figure 5 A front view of part of the support device.

[0043] Figure 7 yes Figure 6 The structural diagram of the support device from a tilted angle.

[0044] Figure 8 yes Figure 5 The structural diagram of the inner support rod in the support device.

[0045] Reference numerals: 1. Wind turbine tower; 11. Welded cylinder; 12. Flange; 121. Bolt hole; 2. First support rod; 3. Connector; 4. Inner support rod; 21. First rod body; 22. First end; 221. Side plane; 222. First through hole; 222. Inner annular surface; 122. Left curved surface; 211. Right curved surface; 212. Upper arc plate; 41. Upper mounting block; 42. Upper shaft; 43. Lower shaft; 44. Lower mounting block; 45. Lower arc plate; 46. Handle; 47. Second support rod; 5. Third support rod; 6. Second rod body; 51. Second end; 52. Third rod body; 61. Third end; 62. Detailed Implementation

[0046] The following describes in detail some embodiments of the wind turbine tower 1 support device of this application with reference to the accompanying drawings.

[0047] like Figure 1 A deformation-resistant support device for offshore wind turbine towers, such as Figure 2 It is used to support the wind turbine tower 1 and reduce its deformation during storage. Figure 1 The support device is installed Figure 2 Between each two adjacent wind turbine towers 1 of the three wind turbine towers 1. In order to ensure stable placement, the wind turbine towers 1 are generally placed horizontally. After being stored for a long time (such as 1 month), the top of the tower is prone to sinking downward due to gravity, resulting in some deformation. This offshore wind turbine tower anti-deformation support device helps to reduce this deformation.

[0048] Please see Figure 3 Each wind turbine tower 1 includes a welded cylinder 11 and flanges 12 welded to both ends of the welded cylinder 11. The flanges 12 can be inner flanges 12, that is, they bulge inward relative to the welded cylinder 11, forming an inner bulging ring structure. The welded cylinder 11 indicates that it is a welded cylinder, which can be a steel ring welded from rolled steel plates, or a cylinder welded from multiple steel rings.

[0049] The outer diameters of the welded cylinder 11 and flange 12 can be equal, ranging from 4 to 10 meters, and are not limited to this. The thickness of the welded cylinder 11 can be 4 centimeters. Both the welded cylinder 11 and flange 12 can be made of steel. The welded cylinder 11 can be formed by welding multiple short circular steel cylinders sequentially. Each circular steel cylinder is formed by rolling and welding plate steel. The support column of the wind turbine tower can be formed by connecting three of the aforementioned wind turbine tower cylinders 1 through flange 12.

[0050] like Figure 4 The flange 12 is provided with a plurality of bolt holes 121 of equal diameter evenly distributed. For example, bolt holes 121 are evenly distributed on the inner convex ring, such as one hundred bolt holes. The diameter of the bolt holes 121 can be 7~15cm.

[0051] Please refer to Figure 5 Between every two wind turbine towers 1, the support device includes a first support rod 2 for connecting two flanges 12 of adjacent wind turbine towers 1, multiple connecting members 3, and multiple inner support rods 4 for supporting the welded cylinder 11 in the internal diameter direction. The connecting members 3 can be bolts, and the number can be three. There can be two inner support rods 4, respectively located inside adjacent welded cylinders 11 near the flanges 12, to reduce the pressure on the flanges 12.

[0052] Please refer to Figure 6 The first support rod 2 is vertically positioned and supported at the middle vertical diameter position of the flange 12. The first support rod 2 includes a first rod body 21 and two first ends 22. The first rod body 21 has a cylindrical shape that gradually expands from both ends towards the middle. The two first ends 22 are welded to both ends of the first rod body 21, and the first rod body 21 and the two first ends 22 can be integrally formed. Each first end 22 has two parallel side planes 221 that can fit against the end faces of two adjacent flanges 12. One or more first through holes 222, for example, three, are formed between the two side planes 221 of the first end 22 to align with the bolt holes 121 of two adjacent flanges 12. The connecting member 3 can pass through the aligned bolt holes 121 and the middle first through holes 222; after insertion, the first rod body 21 is positioned in the diametrical direction of the flange 12. The structure of the first support rod 2 simultaneously connecting two flanges 12 allows the first support rod 2 to synchronously support the two flanges 12 of two adjacent wind turbine towers 1, enabling the two flanges 12 to deform synchronously. Even after deformation, the two mating flanges 12 have essentially the same shape, resulting in high mating accuracy. The inner support rod 4, supporting the welded cylinder 11 in the internal diameter direction, further enhances the support force of the device on the wind turbine tower 1, minimizing the deformation of the wind turbine tower 1.

[0053] like Figure 6As shown, the first rod 21 has a cylindrical shape that gradually expands from both ends to the middle, giving it greater bending strength compared to strip or columnar rods. The first rod 21 is located in the diametrical direction of the flange 12. In specific installation, it can be set to a vertical direction to resist the downward deformation of the upper part of the flange 12 due to gravity and reduce the deformation.

[0054] Please refer to Figure 7 and Figure 4 To further enhance the supporting force of the first support rod 2 on the flange 12, both ends of the first rod 21 are curved surfaces that can conform to the inner annular surfaces 122 of the two flanges 12. Specifically, the two ends of the first rod 21 that contact the two first end faces 22 are both curved surfaces, capable of abutting against the inner annular surfaces 122 of the two mating flanges 12.

[0055] Please refer to Figure 7 Each of the first end portions 22 is welded to the middle of the end face of the first rod body 21 and can be clamped by two adjacent flanges 12. During installation, the two wind turbine towers 1 can be brought close together so that the two flanges 12 are fitted over the end faces of the first rod body 21, with the first end portion 22 clamped between the two flanges 12. The first end portion 22 can also be arc-shaped, with the curvature equal to that of the flange 12. After installation, both ends of the first rod body 21 can be closely supported on the inner annular surfaces 122 of the two flanges 12, which not only improves the support force on the two flanges 12 but also further improves the synchronous deformation of the two flanges 12, facilitating the connection of the bolt holes 121 of the two flanges 12.

[0056] Please refer to Figure 7 Based on the above, the curved surfaces at both ends of the first rod 21 are divided into a left curved surface 211 and a right curved surface 212 by the first end 22. The width of the left curved surface 211 is greater than or equal to the thickness of one flange 12, and the width of the right curved surface 212 is greater than or equal to the thickness of one flange 12, so that both the left curved surface 211 and the right curved surface 212 can fully support the inner ring surface 122 of one flange 12, providing strong support for the two flanges 12, resulting in minimal deformation of the flanges 12, and the deformation of the two flanges 12 is almost synchronous and the same.

[0057] For the central expansion structure of the first rod 21, the central diameter of the first rod 21 can be set to be 1.8 to 2.2 times the radial dimension of both ends of the first rod 21, so that the bending resistance of the first rod 21 is maximized in the large-diameter wind turbine tower 1 structure. The central part of the first rod 21 can be a non-standard cylinder with a uniformly varying diameter, and the two ends can be quadrangular prisms to increase the support area for the two flanges 12.

[0058] In an optional embodiment, each of the first ends 22 has three first through holes 222, which are arranged in an arc shape equivalent to the amplitude of the flange 12. Each end can be connected to the flange 12 through the three first through holes 222, thereby improving the torsional resistance of the first rod 21 relative to the flange 12.

[0059] Please refer to Figure 5 In a preferred embodiment, an inner support rod 4 is provided in each adjacent welded cylinder 11; the inner support rod 4 is located near the flange 12 and in the diameter direction of the welded cylinder 11, so that the welded cylinder 11 near the flange 12 is also supported, reducing the additional pressure of the welded cylinder 11 on the flange 12, thereby reducing the deformation of the flange 12 and improving the accuracy of the flange 12 connection.

[0060] Please refer to Figure 8 In one optional embodiment, the inner support rod 4 includes an upper arc-shaped plate 41, an upper mounting block 42, an upper shaft 43, a lower shaft 44, a lower mounting block 45, and a lower arc-shaped plate 46. The curvature of the upper arc-shaped plate 41 and the lower arc-shaped plate 46 is adapted to the curvature of the welded cylinder 11; the upper mounting block 42 is fixed to the inner surface of the upper arc-shaped plate 41; the upper mounting block 42 has a spherical groove; one end of the upper shaft 43 is spherical, which is adapted to be inserted into the spherical groove, and can rotate freely but cannot be pulled out of the spherical groove; the other end of the upper shaft 43 is provided with an external thread; one end of the lower shaft 44 is provided with an internal thread adapted to the external thread; the other end of the lower shaft 44 is spherical, which... The upper shaft 43 is fitted into the lower mounting block 45 and can rotate freely within it but cannot be pulled out. The lower mounting block 45 is fixed to the inner surface of the lower arc-shaped plate 46. The upper shaft 43 is threaded to the lower shaft 44. Adjusting the distance between the upper shaft 43 and the lower shaft 44 allows the upper arc-shaped plate 41 and the lower arc-shaped plate 46 to abut against the inner surface of the welded cylinder 11, and the line connecting the upper shaft 43 and the lower shaft 44 is located in the diameter direction of the inner cylinder. Adjusting the distance between the upper shaft 43 and the lower shaft 44 allows the upper arc-shaped plate 41 and the lower arc-shaped plate 46 to abut against the inner surface of the welded cylinder 11, making installation and disassembly very convenient. When disassembling the inner support rod 4, the distance between the upper shaft 43 and the lower shaft 44 is shortened by rotation, allowing the inner support rod 4 to be removed. For convenient rotation, handles 47 can also be installed on the sides of the upper shaft 43 and the lower shaft 44.

[0061] To further enhance the supporting force of the support device on the flange 12, the support device further includes a second support rod 5 and a third support rod 6. The second support rod 5 and the third support rod 6 are parallel to the first support rod 2 and are distributed on both sides of the first support rod 2. Preferably, the structures of the second support rod 5 and the third support rod 6 are symmetrical. For example, the two ends of the second support rod 5 are configured to be fixed to two adjacent flanges 12; the two ends of the third support rod 6 are configured to be fixed to two adjacent flanges 12. The symmetrical second support rod 5 and the third support rod 6 further strengthen the supporting force on the wind turbine tower 1, reduce the deformation of the flange 12, and improve the mating accuracy of the relative flanges 12.

[0062] The structures of the second support rod 5 and the third support rod 6 are similar to those of the first support rod 2. For example, the second support rod 5 includes a second rod body 51 and two second ends 52. The second rod body 51 has a cylindrical structure that gradually expands from both ends to the middle. The two second ends 52 are welded to both ends of the second rod body 51. Each second end 52 has two parallel side planes 221, and multiple second through holes are formed between the two side planes 221. After aligning the multiple second through holes with the multiple bolt holes 121 of the two wind turbine towers 1, a connecting piece 3 can be passed through one bolt hole 121, one second through hole, and another bolt hole 121, and repeatedly passed through multiple connecting pieces 3, so that the second rod body 51 is fixed to the non-diameter chord of the flange 12. The second support rod 5 and the first support rod 2 have similar cylindrical structures that gradually expand from both ends to the middle, which improves their bending resistance. The second support rod 5 and the third support rod 6 are located on the non-diameter chord of the flange 12, while the first support rod 2 is located on the diameter chord of the flange 12. Together, they support the flange 12 and consolidate the roundness of the flange 12.

[0063] The third support rod 6 includes a third rod body 61 and two third ends 62. The third rod body 61 has a cylindrical structure that gradually expands from both ends to the middle. The two third ends 62 are welded to both ends of the third rod body 61. Each third end 62 has two parallel side planes 221, and multiple third through holes are formed between the two side planes 221.

[0064] Based on the above-mentioned anti-deformation support devices for offshore wind turbine towers, the construction methods for using these support devices to support wind turbine tower 1 include:

[0065] (1) Place multiple (e.g., three) wind turbine tower sections 1 horizontally with a certain gap between them, and arrange them in a line according to the actual order of connection. Insert the first support rod 2, the second support rod 5 and the third support rod 6 between two adjacent wind turbine tower sections 1. The first support rod 2, the second support rod 5 and the third support rod 6 are all vertically arranged and parallel to each other. The second support rod 5 and the third support rod 6 are located on both sides of the first support rod 2. Move the first support rod 2 to embed it into the flange 12 of one wind turbine tower section 1. The two left curved surfaces 211 at both ends of the first support rod 2 slide into the flange 12 and closely contact the inner ring surface 122 of the flange 12. The two first ends 22 at both ends of the first support rod 2 are laterally close to the flange 12.

[0066] (2) Move another wind turbine tower 1 so that the flange 12 of the wind turbine tower 1 is fitted onto the two right curved surfaces 212 at both ends of the first support rod 2, so that the two adjacent wind turbine towers 1 clamp the two first ends 22 of the first support rod 2, as well as the ends that clamp the second support rod 5 and the third support rod 6.

[0067] (3) Take multiple connecting parts 3, each connecting part 3 passing through the front and rear bolt holes 121 and the middle first through hole 222; so that the two first ends 22 at both ends of the first support rod 2, the two second ends 52 at both ends of the second support rod 5, and the two third ends 62 at both ends of the third support rod 6 are respectively fixedly connected to the two flanges 12.

[0068] (4) Take two inner support rods 4, place them into two adjacent welded cylinders 11, and install them at the adjacent flange 12. Place the lower arc plate 46 against the lower inner wall of the inner cylinder, rotate the upper shaft 43 to move the upper arc plate 41 upward until the upper arc plate 41 is against the upper inner wall of the inner cylinder.

[0069] (5) Repeat steps (1) to (4) and use another set of first support rod 2, second support rod 5, third support rod 6, connector 3 and two inner support rods 4 to support another adjacent wind turbine tower 1.

[0070] Optionally, this construction method may also include step (6), using a laser measuring instrument to perform alignment checks on the bolt holes 121 of the two connected wind turbine tower sections 1, and correcting any unqualified points found.

[0071] Through the above construction method, multiple sets of adjacent wind turbine towers 1 are synchronously supported, ensuring that the deformation of the end flanges 12 is basically the same. This uniform deformation allows for precise alignment of the bolt holes 121 during subsequent installation. In addition to directly supporting the flanges 12, the above construction method also supports the welded cylinder 11, effectively reducing the shear pressure exerted by the welded cylinder 11 on the flanges 12 and minimizing the deformation of the flanges 12. This construction method is simple, provides significant support for the flanges 12 and the welded cylinder 11, and ensures precise alignment of the mating flanges 12 and their bolt holes 121.

[0072] The above description is merely a preferred embodiment of this application. The scope of protection of this application is not limited to the above embodiments. All technical solutions falling within the scope of this application's concept are within the scope of protection of this application. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this application should also be considered to fall within the scope of protection of this application.

Claims

1. A deformation-preventing support device for offshore wind turbine tower, each of the wind turbine tower (1) comprising a welded cylinder (11) and flanges (12) welded to both ends of the welded cylinder (11), a plurality of bolt holes (121) are formed on the flanges (12), characterized in that: The support device comprises a first support rod (2) and a plurality of series connectors (3) for connecting two adjacent flanges (12) of the wind tower (1), and a plurality of inner support rods (4) for supporting the inner diameter direction of the welded cylinder (11); ​ The first support rod (2) comprises a first rod body (21) and two first end portions (22); the first rod body (21) has a gradually enlarged structure from both ends to the middle; the two first end portions (22) are welded at both ends of the first rod body (21); each first end portion (22) has two parallel side planes (221) that can fit adjacent flanges (12); one or more first penetrating holes (222) are provided between the two side planes (221) to connect the bolt holes (121) of the two adjacent flanges (12); the series connector (3) can pass through the connected bolt holes (121) and first penetrating holes (222), so that the first rod body (21) is in the diameter direction of the flange (12).

2. Offshore wind turbine tower anti-deformation support apparatus according to claim 1, characterized in that: Both ends of the first rod body (21) are curved surfaces that can fit the inner ring surface (122) of the two flanges (12); each first end portion (22) is welded in the middle of one end face of the first rod body (21) and can be clamped by adjacent two flanges (12).

3. Offshore wind turbine tower anti-deformation support apparatus according to claim 2, characterized in that: The two end curved surfaces of the first rod body (21) are divided into left curved surface (211) and right curved surface (212) by the first end portion (22); the width of the left curved surface (211) is greater than or equal to the thickness of one flange (12); the width of the right curved surface (212) is greater than or equal to the thickness of one flange (12).

4. Offshore wind turbine tower anti-deformation support apparatus according to claim 1, characterized in that: The middle diameter of the first rod body (21) is 1.8~2.2 times the radial dimension of both ends of the first rod body (21).

5. The offshore wind tower deformation prevention support apparatus according to claim 1, characterized in that: Each first end portion (22) is provided with three first penetrating holes (222), and the three first penetrating holes (222) are arranged in an arc shape equal to the width of the flange (12).

6. Offshore wind turbine tower anti-deformation support apparatus according to any of claims 1-5, characterized in that: Each adjacent welded cylinder (11) is provided with an inner support rod (4); the inner support rod (4) is arranged adjacent to the flange (12) and in the diameter direction of the welded cylinder (11).

7. Offshore wind turbine tower anti-deformation support apparatus according to claim 6, characterized in that: The inner support rod (4) comprises an upper arc plate (41), an upper mounting block (42), an upper shaft (43), a lower shaft (44), a lower mounting block (45) and a lower arc plate (46); the arc of the upper arc plate (41) and the lower arc plate (46) is adapted to the arc of the welded cylinder (11); the upper mounting block (42) is fixed to the inner face of the upper arc plate (41); the upper mounting block (42) has a spherical groove; one end of the upper shaft (43) is spherical, which is adapted to be inserted into the spherical groove and can rotate freely but cannot be pulled out of the spherical groove; the other end of the upper shaft (43) is provided with external threads; one end of the lower shaft (44) is provided with internal threads adapted to the external threads; the other end of the lower shaft (44) is spherical, which is adapted to be embedded in the lower mounting block (45) and can rotate freely in the lower mounting block (45) but cannot be pulled out; the lower mounting block (45) is fixed to the inner face of the lower arc plate (46); by threadedly connecting the upper shaft (43) to the lower shaft (44), adjusting the distance between the upper shaft (43) and the lower shaft (44) can make the upper arc plate (41) and the lower arc plate (46) respectively abut against the inner surface of the welded cylinder (11), and the connecting line of the upper shaft (43) and the lower shaft (44) is located in the diameter direction of the inner cylinder.

8. Offshore wind turbine tower anti-deformation support apparatus according to any of claims 1-5, characterized in that: The support device further comprises a second support rod (5) and a third support rod (6) arranged in parallel on both sides of the first support rod (2); the second support rod (5) and the third support rod (6) are structurally symmetrical and both have a structure gradually swelling from both ends to the middle; the two ends of the second support rod (5) are arranged to be able to be fixed to two adjacent flanges (12); the two ends of the third support rod (6) are arranged to be able to be fixed to two adjacent flanges (12).

9. Offshore wind turbine tower anti-deformation support apparatus according to claim 8, characterized in that: The second support rod (5) comprises a second rod body (51) and two second end portions (52); the second rod body (51) has a structure gradually swelling from both ends to the middle; the two second end portions (52) are welded at both ends of the second rod body (51); each second end portion (52) has two parallel side planes (221), and a plurality of second penetrating holes are formed between the two side planes (221); after a plurality of second penetrating holes are butt-jointed to a plurality of bolt holes (121) of two wind tower cylinders (1), the series connecting piece (3) can pass through one bolt hole (121), one second penetrating hole and another bolt hole (121), so that the second rod body (51) is located on a non-diameter chord of the flange (12).

10. A method of installing a deformation preventing support device for an offshore wind power tower according to any one of claims 1 to 9, characterized in that, The construction method comprises: a plurality of wind tower cylinders (1) are arranged in a line and laid flat at intervals, the first support rod (2) is inserted between adjacent two wind tower cylinders (1), and the wind tower cylinders (1) are moved so that adjacent two wind tower cylinders (1) clamp two first end portions (22) of the first support rod (2); Take a plurality of said stringing pieces (3), each of said stringing pieces (3) passes through the front and rear two said bolt holes (121) and the middle said first through hole (222); Take the inner support rod (4) to support in the inside of the welded cylinder (11).

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