Fan tower drum reinforcing device, tower drum and wind driven generator

Abstract

The invention relates to the technical field of wind power generation, in particular to a fan tower tube reinforcing device, a tower tube and a wind driven generator. The fan tower tube reinforcing device comprises a reinforcing body, a first connecting flange and a second connecting flange. The reinforcing main body is provided with an accommodating cavity for accommodating high-performance concrete; the first connecting flange and the second connecting flange are connected to the two ends of the reinforcing body correspondingly and used for being connected with the two tower drum flanges correspondingly, and the two tower drum flanges are arranged in the axis direction of the tower drum in a spaced mode. The fan tower tube reinforcing device is applied to a tower tube of a wind driven generator, can play a role in reinforcing the tower tube, and is simple in structure, flexible and convenient to use and low in use cost.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind turbine tower reinforcement device, a tower and a wind turbine generator. Background Art

[0002] During the service life of the wind turbine tower, if the tower is hit by external impact, such as blade sweeping the tower, impact by lifting equipment, etc., the tower body will be dented to a certain extent. This kind of tower with dents is called a defective tower. At present, the conventional solution for defective towers is to correct and repair the tower dents, or directly discard the tower sections.

[0003] The corrective repair for a dented tower is to flatten the dented area. The degree to which this treatment can restore the tower's strength is usually difficult to assess, because dents are often accompanied by plastic deformation of the tower steel. A tower with plastic deformation is very prone to buckling and instability under pressure, thus causing a tower collapse accident. If the tower is directly discarded and a new tower section is purchased, the cost is very high. Summary of the invention

[0004] The purpose of the present invention includes providing a wind turbine tower reinforcement device, a tower and a wind turbine generator. The wind turbine tower reinforcement device is applied to the tower of the wind turbine generator, which can reinforce the tower, and has a simple structure, flexible and convenient use, and low use cost.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a wind turbine tower reinforcement device, the wind turbine tower reinforcement device comprising a reinforcement body, a first connecting flange and a second connecting flange;

[0007] The reinforcement body is provided with a cavity for accommodating high-performance concrete; the first connecting flange and the second connecting flange are respectively connected to the two ends of the reinforcement body, and the first connecting flange and the second connecting flange are respectively used to connect with two tower flanges, and the two tower flanges are spaced apart along the axial direction of the tower.

[0008] In an optional embodiment, the first connecting flange or the second connecting flange is provided with a conducting hole communicating with the cavity.

[0009] In an optional embodiment, the first connecting flange and the second connecting flange are each provided with at least one flange connecting hole, and the flange connecting hole is used to be connected with the flange connecting bolts of the tower flange.

[0010] In an optional embodiment, the first connecting flange and the second connecting flange are each provided with at least one temporary connecting hole, and the temporary connecting hole is used to install fixing bolts connected to the tower flange.

[0011] In an optional embodiment, the wind turbine tower reinforcement device further includes a cylinder wall connector for connecting to the cylinder wall of the tower;

[0012] The cylinder wall connecting piece is connected to the first connecting flange and the second connecting flange; or, the cylinder wall connecting piece is connected to the reinforcement body.

[0013] In an optional embodiment, the cross-section of the reinforcement body is circular, elliptical, polygonal or sector-shaped.

[0014] In an optional embodiment, the wind turbine tower reinforcement device further includes reinforcing ribs extending along the center line direction of the reinforcement body and built into the cavity.

[0015] In a second aspect, the present invention provides a tower, the tower comprising a cylinder body and at least one of the above-mentioned wind turbine tower reinforcement devices;

[0016] The cylinder body includes a plurality of cylinder segments, and adjacent cylinder segments are connected through tower flanges;

[0017] The wind turbine tower reinforcement device is placed in the cylinder body, and the first connecting flange and the second connecting flange are respectively connected to the two tower flanges, and one or more cylinder sections are distributed between the two tower flanges.

[0018] In an optional embodiment, the tower includes a plurality of wind turbine tower reinforcement devices, and the plurality of wind turbine tower reinforcement devices are arranged at intervals around the axial direction of the tower.

[0019] In a third aspect, the present invention provides a wind turbine generator, the wind turbine generator comprising a wind turbine assembly and the tower described above;

[0020] The fan assembly is connected to the top of the tower.

[0021] The wind turbine tower reinforcement device, tower and wind turbine provided by the embodiments of the present invention have the following beneficial effects:

[0022] The wind turbine tower reinforcement device comprises a reinforcement body, a first connection flange and a second connection flange; the reinforcement body is provided with a cavity for accommodating high-performance concrete; the first connection flange and the second connection flange are respectively connected to the two ends of the reinforcement body, and the first connection flange and the second connection flange are respectively used to connect with two tower flanges, and the two tower flanges are spaced apart along the axial direction of the tower. The wind turbine tower reinforcement device is applied to the tower of a wind turbine generator, which can reinforce the tower, and has a simple structure, flexible and convenient use, and low use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of the wind turbine tower reinforcement device provided in this embodiment;

[0025] Figure 2 A cross-sectional view of the reinforcement body provided in this embodiment;

[0026] Figure 3 A schematic diagram of the structure of the reinforcement body and the first connecting flange provided in this embodiment;

[0027] Figure 4 A schematic diagram of the structure of the reinforcement body and the second connecting flange provided in this embodiment;

[0028] Figure 5 A schematic diagram of the structure of the tower provided in this embodiment;

[0029] Figure 6 for Figure 5 The local schematic diagram of the A in the middle;

[0030] Figure 7 A schematic diagram of the connection between the wind turbine tower reinforcement device and the tower flange provided in this embodiment.

[0031] Icons: 100-wind turbine tower reinforcement device; 110-reinforcement body; 120-first connecting flange; 130-second connecting flange; 111-high-performance concrete; 112-cavity; 200-tower; 210-tower flange; 121-through hole; 122-flange connecting hole; 211-flange connecting bolt; 123-temporary connecting hole; 124-fixing bolt; 220-cylinder body; 221-cylinder section. DETAILED DESCRIPTION

[0032] During the service life of a wind turbine tower, if the tower is hit by an external impact, such as blades sweeping the tower, impact by lifting equipment, etc., the cylinder will be dented to a certain extent. This tower with a dent is called a defective tower. At present, the conventional solution for defective towers is to correct and repair the dents in the tower, or directly discard the tower section. The correction and repair of a dented tower is to flatten the dented part. This treatment method is usually difficult to assess the degree of recovery of the tower strength, because the dent is often accompanied by plastic deformation of the tower steel. The plastically deformed tower is very prone to buckling instability under pressure, which can cause a tower collapse accident. If the tower is directly discarded and a new tower section is purchased, the cost is very expensive.

[0033] In response to the above problems, the present invention provides a wind turbine tower reinforcement device 100, which can reinforce the tower 200, so that the wind turbine tower reinforcement device 100 can be used to repair and reinforce the defective tower, thereby improving the structural strength and anti-buckling strength of the defective tower, thereby reducing the cost of repair.

[0034] In addition, the wind power industry often sees the situation of "small to big", that is, using a large impeller and a high-power head to replace the original wind turbine head. When "small to big", if a large impeller and a high-power head are used to replace the original wind turbine head, it is easy for the strength margin of the tower 200 to be near the critical value. For this situation, the prior art often requires repurchasing the tower 200. The wind turbine tower reinforcement device 100 can reinforce the original tower 200, thereby improving the structural strength and anti-buckling strength of the tower 200, thereby reducing the cost of "small to big".

[0035] The purpose of the present invention includes providing a tower 200 and a wind turbine. The wind turbine tower reinforcement device 100 is applied to the tower 200 of the wind turbine, which can reinforce the tower 200, and has a simple structure, flexible and convenient use, and low cost.

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0041] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0042] Please refer to Figure 1-Figure 7 , this embodiment provides a wind turbine tower reinforcement device 100, the wind turbine tower reinforcement device 100 includes a reinforcement body 110, a first connecting flange 120 and a second connecting flange 130;

[0043] The reinforcement body 110 is provided with a cavity 112 for accommodating high-performance concrete 111; the first connecting flange 120 and the second connecting flange 130 are respectively connected to the two ends of the reinforcement body 110, and the first connecting flange 120 and the second connecting flange 130 are respectively used to connect with two tower flanges 210, and the two tower flanges 210 are spaced apart along the axial direction of the tower 200.

[0044] Please refer to Figure 1-Figure 7 The working principle of the wind turbine tower reinforcement device 100 is:

[0045] The wind turbine tower reinforcement device 100 includes a reinforcement body 110, a first connection flange 120 and a second connection flange 130; the reinforcement body 110 is provided with a cavity 112 for accommodating high-performance concrete 111; the first connection flange 120 and the second connection flange 130 are respectively connected to the two ends of the reinforcement body 110, and the first connection flange 120 and the second connection flange 130 are respectively used to connect with two tower flanges 210, and the two tower flanges 210 are spaced apart along the axial direction of the tower 200. Therefore, through the aforementioned structural setting method, the structural strength and anti-buckling strength of the reinforcement body 110 and the high-performance concrete 111 therein can be increased on the basis of solidification, and then the wind turbine tower reinforcement device 100 can be installed under the condition that the first connection flange 120 and the second connection flange 130 are respectively connected with the two spaced tower flanges 210, so as to play a reinforcement role;

[0046] Therefore, the wind turbine tower reinforcement device 100 is applied to the tower 200 of the wind turbine, which can reinforce the tower 200, and has a simple structure, is easy to process, transport and hoist, is flexible and convenient to use, and has low cost.

[0047] It should be noted that, in the present embodiment, the reinforcement body 110 is a steel pipe, the purpose of which is to make the reinforcement body 110 itself have a reinforcement function, and the structural shape of the reinforcement body 110 can be adjusted according to the use requirements, that is, the cross section of the reinforcement body 110 is circular, elliptical, polygonal or fan-shaped, so its specific selection can be adjusted according to actual needs; due to the sealing effect of the reinforcement body 110, the concrete inside does not need too much maintenance; and the material of the reinforcement body 110 can also be made of materials with different strengths. The steel material used in this embodiment, and in other embodiments of the present invention, other types of materials can also be selected based on cost or strength and combined with use requirements;

[0048] In addition, when high-performance concrete 111 is filled into the reinforcement body 110, the purpose is to improve its structural strength and its anti-buckling strength on the basis of the reinforcement body 110. Based on this, when filling high-performance concrete 111, high-performance concrete 111 can be dense high-strength concrete, which has strong anti-shrinkage ability, and it can be concrete with a strength grade not lower than C60. In addition, under the condition of meeting the use requirements, it is also possible to consider using active auxiliary cementitious materials prepared from industrial waste residues, such as fly ash and recycled powder, etc., the purpose of which is to save cement, silica fume and energy resources, effectively reduce costs, and improve the relevant properties of concrete. In addition, waste glass powder can also be used as a substitute for cement to prepare self-compacting concrete, which can improve the strength and working performance of concrete.

[0049] It should also be pointed out that, based on the above content, the wind turbine tower reinforcement device 100 can be used to repair and reinforce defective towers, and can also be used in the small-to-large modification scenario in the wind power field, that is, it can be used to upgrade the existing tower 200, and the structural design of the wind turbine tower reinforcement device 100 can also be added to the existing tower 200 structure. The purpose is to reduce the cost of use and installation on the basis of improving the strength of the tower 200, and at the same time, it can facilitate later maintenance or upgrading.

[0050] For further information, please refer to Figure 1-Figure 7 In this embodiment, when configuring the first connection flange 120 and the second connection flange 130, a through hole 121 communicating with the cavity 112 may be provided in the first connection flange 120 or the second connection flange 130. Such a setting is intended to facilitate the addition of high-performance concrete 111 into the reinforcement body 110, that is, to facilitate the pouring or exhaust of concrete; such a setting is based on the fact that the first connection flange 120, the second connection flange 130 and the reinforcement body 110 are prefabricated structures, and the first connection flange 120 and the second connection flange 130 are connected to the reinforcement body 110 by welding before the concrete is injected; and based on such a structure, when injecting concrete, if the first connection flange 120 is located above the second connection flange 130, the through hole 121 is provided in the first connection flange 120, that is, concrete can be injected from the through hole 121 above, and the lower end of the reinforcement body 110 is blocked by the second connection flange 130.

[0051] In addition, in other embodiments of the present invention, if the first connection flange 120 or the second connection flange 130 is welded to the reinforcement body 110 after concrete is injected, the lower end of the reinforcement body 110 may be sealed first, or one of the first connection flange 120 and the second connection flange 130 may be welded to the reinforcement body 110 first, and then the other of the first connection flange 120 and the second connection flange 130 may be welded to the reinforcement body 110 after concrete is injected or after the concrete is solidified;

[0052] Therefore, based on the above content, it can be known that the welding of the first connecting flange 120 and the second connecting flange 130 to the reinforcement body 110, and the injection sequence of concrete can be flexibly adjusted based on actual use requirements.

[0053] In order to facilitate the connection between the first connection flange 120 and the second connection flange 130 and the tower flange 210, the first connection flange 120 and the second connection flange 130 are each provided with at least one flange connection hole 122, and the flange connection hole 122 is used to connect with the flange connection bolt 211 of the tower flange 210. It should be noted that in this embodiment, in order to improve the connection strength, the first connection flange 120 and the second connection flange 130 are provided with multiple flange connection holes 122, which are evenly distributed, so as to improve the structural connection strength, as well as the uniformity and stability of the connection.

[0054] It should be noted that the opening of the flange connection hole 122 needs to be compatible with the flange connection bolts 211 of the corresponding tower flange 210 . Therefore, the opening of the flange connection hole 122 can be set based on the size of the flange connection bolts 211 of the corresponding tower flange 210 .

[0055] When installing the wind turbine tower reinforcement device 100, in order to simplify the installation steps, the first connection flange 120 and the second connection flange 130 are each provided with at least one temporary connection hole 123, and the temporary connection hole 123 is used to install the fixing bolt 124 connected to the tower flange 210. Through such a setting, when installing the wind turbine tower reinforcement device 100, before connecting with the flange connection bolt 211 of the tower flange 210 through the flange connection hole 122, the fixing bolt 124 connected to the tower flange 210 can be installed through the temporary connection hole 123, that is, it can be connected to the tower flange 210 through the fixing bolt 124 installed in the temporary connection hole 123, and is used for temporary fixation of the wind turbine tower reinforcement device 100 during the hoisting process of the tower 200, that is, it plays a role of positioning and temporary fixation, which is conducive to improving the installation efficiency, and after the assembly is completed, the fixing bolt 124 used for temporary fixation can be removed or retained.

[0056] For further information, please refer to Figure 1-Figure 7In this embodiment, on the basis of the above structure, the wind turbine tower reinforcement device 100 may further include a cylinder wall connector for connecting with the cylinder wall of the tower 200; the cylinder wall connector may be connected to the first connection flange 120 and the second connection flange 130; or, the cylinder wall connector may be connected to the reinforcement body 110; wherein, when configuring the cylinder wall connector, multiple cylinder wall connectors may be provided, so that one or more cylinder wall connectors are correspondingly provided on the first connection flange 120, the second connection flange 130 and the reinforcement body 110, and connected to the cylinder wall of the tower 200 through the cylinder wall connector; the aforementioned cylinder wall connector may also be provided on one or more of the first connection flange 120, the second connection flange 130 and the reinforcement body 110. Such a setting method enables the wind turbine tower reinforcement device 100 to be fixedly connected to the tower flange 210 and also connected to the cylinder wall of the tower 200, thereby increasing the strength of the tower 200 on which the wind turbine tower reinforcement device 100 is installed. When configuring the cylinder wall connector, there are a variety of settings. For example, the cylinder wall connector can be a plurality of nail fasteners connected to the first connecting flange 120 and the second connecting flange 130. The nail fasteners can be connected to the cylinder wall of the tower 200 to increase its stability. It can also be set as a nail fastener connected to the outside of the reinforcement body 110 with a clamp or connected by welding.

[0057] In addition, based on the above structure, the wind turbine tower reinforcement device 100 may also include reinforcing ribs extending along the center line direction of the reinforcement body 110 and built into the cavity 112 , the purpose of which is to increase the structural strength of the reinforcement body 110 .

[0058] It should be noted that, in this embodiment, the reinforcement body 110 is a steel round tube with a thickness of 5 mm and a diameter of 200 mm, which is filled with dense high-strength concrete, and the first connecting flange 120 and the second connecting flange 130 are both made of 30 mm thick Q355 structural steel cut and made as an example. The corresponding diameter of the through hole 121 is 20 mm, and the tower flange 210 on the tower 200 is an L-shaped flange.

[0059] In summary, when installing the wind turbine tower reinforcement device 100, after the concrete strength is stable, the wind turbine tower reinforcement device 100 can be transported to the wind turbine machine site for installation. During installation, the wind turbine head is first lifted off, and a number of small blind holes are opened on the original tower 200 flange for fixing temporary connecting bolts; then, the wind turbine tower reinforcement device 100 is lifted from the top of the tower into the tower 200 and fixed with temporary bolts; the installation process may require the assistance of other mechanical equipment, such as electric or hand winches; finally, the flange connecting bolts 211 of the tower 200 are tightened and the wind turbine head is hoisted; after tightening the tower flange 210 bolts, the fixing bolts 124 can be retained or removed.

[0060] Based on the above, please refer to Figure 1-Figure 7 This embodiment further provides a tower 200, which includes a cylinder body 220 and at least one of the above-mentioned wind turbine tower reinforcement devices 100; the cylinder body 220 includes a plurality of cylinder segments 221, and adjacent cylinder segments 221 are connected by a tower flange 210;

[0061] The wind turbine tower reinforcement device 100 is placed in the cylinder 220, and the first connecting flange 120 and the second connecting flange 130 are respectively connected to the two tower flanges 210, and one or more cylinder sections 221 are distributed between the two tower flanges 210, that is, one or more cylinder sections 221 correspond to the same wind turbine tower reinforcement device 100; one or more cylinder sections 221 can also correspond to one or more wind turbine tower reinforcement devices 100.

[0062] Therefore, it can be known from the above contents that the tower 200 can increase its structural strength, improve its anti-buckling strength, improve its use stability, and extend its service life by adopting the above-mentioned wind turbine tower reinforcement device 100. Moreover, during use, based on its structure, the length of the wind turbine tower reinforcement device 100 can be adapted to the length of a single cylinder segment 221 of the cylinder 220, or to the sum of the lengths of multiple cylinder segments 221, that is, during use, it can not only strengthen the structural strength of a single cylinder segment 221, but also strengthen the structural strength of multiple cylinder segments 221 according to use requirements.

[0063] In addition, it should be noted that the tower 200 in this embodiment can be either a defective tower or an existing tower 200, and the structure of the tower 200 can be a segmented or lattice tower.

[0064] Furthermore, in this embodiment, when the tower 200 includes a plurality of wind turbine tower reinforcement devices 100, the plurality of wind turbine tower reinforcement devices 100 may be arranged at intervals around the axial direction of the tower 200, with the purpose of increasing the stability of the structure.

[0065] Based on the above, please refer to Figure 1-Figure 7 This embodiment also provides a wind turbine generator, which includes a wind turbine assembly and the above-mentioned tower 200; the wind turbine assembly is connected to the top of the tower 200.

[0066] By adopting the above-mentioned tower 200 design, the wind turbine can not only increase the structural stability of the tower 200, but also facilitate flexible upgrading of the tower 200 according to needs when the performance of the wind turbine components is upgraded or the parameters are changed, thereby helping to reduce the cost of using and upgrading the wind turbine.

[0067] In summary, please refer to Figure 1-Figure 7 When the wind turbine tower reinforcement device 100 is applied to the tower 200 of a wind turbine, it has the following advantages: the wind turbine tower reinforcement device 100 is light in weight, cheap in cost, and convenient to process, transport, install and hoist; the wind turbine tower reinforcement device 100 can flexibly adjust the cross-sectional shape and the number of installations according to actual needs; the wind turbine tower reinforcement device 100 can be installed only in a part of the tower 200 section to increase the strength of the tower 200; the wind turbine tower reinforcement device 100 retains the connection of the original tower 200 flange to the greatest extent; the wind turbine tower reinforcement device 100 has less welding and is not prone to welding fatigue failure; the wind turbine tower reinforcement device 100 can be used not only for the reinforcement of conventional towers 200, but also for the reinforcement of segmented towers 200 or lattice towers;

[0068] It should also be pointed out that: the cross-sectional shape of the reinforcement body 110 of the wind turbine tower reinforcement device 100 can be replaced with an elliptical, polygonal, fan-shaped, etc. shape; the size and installation quantity of the wind turbine tower reinforcement device 100 can be changed; the arrangement and size of the flange connection holes 122 of the wind turbine tower reinforcement device 100 can be changed differently; the wind turbine tower reinforcement device 100 can be used to reinforce a conventional tower 200 of a wind turbine, and can also be used to reinforce a segmented tower 200 or a lattice tower, and can also be used to repair a defective tower; the reinforcement body 110 of the wind turbine tower reinforcement device 100 can be replaced with an iron pipe or other materials with equivalent effects, and the high-strength concrete filled therein can also be concrete with various strength models or materials with equivalent effects.

[0069] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A wind turbine tower reinforcement device, characterized in that: The wind turbine tower reinforcement device comprises a reinforcement body, a first connecting flange and a second connecting flange; The reinforcement body is provided with a cavity for accommodating high-performance concrete; the first connecting flange and the second connecting flange are respectively connected to the two ends of the reinforcement body, and the first connecting flange and the second connecting flange are respectively used to connect to two tower flanges, and the two tower flanges are spaced apart along the axial direction of the tower.

2. The wind turbine tower reinforcement device according to claim 1, characterized in that: The first connecting flange or the second connecting flange is provided with a conducting hole communicating with the cavity.

3. The wind turbine tower reinforcement device according to claim 1, characterized in that: The first connecting flange and the second connecting flange are each provided with at least one flange connecting hole, and the flange connecting hole is used to be connected with the flange connecting bolts of the tower flange.

4. The wind turbine tower reinforcement device according to claim 1, characterized in that: The first connecting flange and the second connecting flange are each provided with at least one temporary connecting hole, and the temporary connecting hole is used for installing fixing bolts connected to the tower flange.

5. The wind turbine tower reinforcement device according to claim 1, characterized in that: The wind turbine tower reinforcement device also includes a cylinder wall connector for connecting to the cylinder wall of the tower; The cylinder wall connecting piece is connected to the first connecting flange and the second connecting flange; or, the cylinder wall connecting piece is connected to the reinforcement body.

6. The wind turbine tower reinforcement device according to claim 1, characterized in that: The cross section of the reinforcement body is circular, elliptical, polygonal or fan-shaped.

7. The wind turbine tower reinforcement device according to claim 1, characterized in that: The wind turbine tower reinforcement device also includes reinforcing ribs extending along the center line direction of the reinforcement body and built into the cavity.

8. A tower, characterized in that: The tower comprises a cylinder body and at least one wind turbine tower reinforcement device according to any one of claims 1 to 7; The cylinder body includes a plurality of cylinder segments, and adjacent cylinder segments are connected via a tower flange; The wind turbine tower reinforcement device is placed in the cylinder body, and the first connecting flange and the second connecting flange are respectively connected to the two tower flanges, and one or more cylinder sections are distributed between the two tower flanges.

9. The tower according to claim 8, characterized in that: The tower comprises a plurality of wind turbine tower reinforcement devices, and the plurality of wind turbine tower reinforcement devices are arranged at intervals around the axial direction of the tower.

10. A wind turbine generator, characterized in that: The wind turbine comprises a wind turbine assembly and a tower as claimed in claim 8 or 9; The fan assembly is connected to the top of the tower.

Images