Copper net grounding assembly for lightning stroke protection of wind power blade

Abstract

The utility model discloses a wind power blade lightning stroke protection copper net grounding assembly, which comprises a bottom connecting piece and a top connecting piece which are mutually connected and installed, the bottom connecting piece comprises a base plate, a protruding column and a via hole, the top connecting piece comprises a fixing plate and an installation hole, the top of the base plate is provided with a first annular groove, and the fixing plate is provided with a second annular groove. The first annular groove and the second annular groove can serve as pre-buried grooves for pre-burying tin wires, after the copper net is installed and fixed, the tin wires are melted through high temperature, the area between the bottom connecting piece and the top connecting piece is filled, the stability between the copper net and the bottom connecting piece and the stability between the copper net and the top connecting piece are effectively improved, and the service life of the copper net is prolonged. The contact surface between the copper net and the bottom connecting piece and the contact surface between the copper net and the top connecting piece can be improved, and the tin wire can effectively seal and weld the edge between the bottom connecting piece and the top connecting piece, so that the resistance of the whole structure is reduced, the thunder and lightning breakdown risk is reduced, and the conductive efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning protection for wind turbine blades, and in particular to a copper mesh grounding component for lightning protection for wind turbine blades. Background Art

[0002] The grounding structures in the existing wind turbine blade lightning protection technology mainly include copper plate connection, copper wire belt connection, and copper mesh grounding component connection.

[0003] The construction of copper plates and copper wire strips is cumbersome and prone to breakage during the construction process. When the copper mesh grounding component is connected and installed with the copper mesh, the copper mesh is full of holes, so the contact area between the grounding component and the copper mesh will be reduced accordingly. This also reduces the friction between the grounding component and the copper mesh, resulting in unstable fixation of the copper mesh. The reduction in contact area will also reduce the conductivity efficiency between the copper mesh and the grounding component.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] The utility model aims to provide a copper mesh grounding assembly for lightning protection of wind turbine blades, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A copper mesh grounding assembly for lightning protection of wind turbine blades, comprising a bottom connector and a top connector which are connected and installed with each other, wherein the bottom connector comprises a base plate, a raised column is integrally arranged at the top center of the base plate, a through hole is arranged at the center of the raised column, and an external thread is arranged on the outer wall of the raised column, and the top connector comprises a fixed plate, a mounting hole is arranged at the center of the fixed plate, and an internal thread is arranged on the inner wall of the mounting hole, and a first annular groove is also arranged at the top of the base plate, the first annular groove is arranged coaxially with the raised column, and a second annular groove is arranged on a side of the fixed plate facing the base plate, and the second annular groove is arranged opposite to the first annular groove.

[0008] Furthermore, two of the first annular grooves and two of the second annular grooves are provided.

[0009] Furthermore, a receiving groove is provided at the bottom of the base plate, and the bottom end of the through hole is connected to the receiving groove.

[0010] Furthermore, an auxiliary groove is provided on the top of the fixing plate.

[0011] Furthermore, an outer side of an end surface of the fixing plate away from the base plate is provided with an inclined surface.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a simple and reasonable structure and is easy to use and install. The first annular groove and the second annular groove can be used as embedded grooves to embed tin wires. After being installed and fixed with the copper mesh, the tin wire is melted by high temperature and fills the area between the bottom connector and the top connector, which can effectively improve the stability between the copper mesh and the bottom connector and the top connector, and can also improve the contact surface between the copper mesh and the bottom connector and the top connector, thereby improving the point effect. The tin wire can also effectively seal and weld the edges between the bottom connector and the top connector, thereby reducing the resistance of the entire structure, reducing the risk of lightning breakdown, and improving the conductive efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a copper mesh grounding assembly for lightning protection of wind turbine blades according to an embodiment of the utility model;

[0015] Figure 2 It is a structural schematic diagram of a bottom connector in a copper mesh grounding assembly for lightning protection of wind turbine blades according to an embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the bottom of a bottom connector in a copper mesh grounding assembly for lightning protection of wind turbine blades according to an embodiment of the utility model;

[0017] Figure 4 It is a schematic structural diagram of a top connector in a copper mesh grounding assembly for lightning protection of wind turbine blades according to an embodiment of the utility model;

[0018] Figure 5 It is a schematic diagram of the bottom structure of a top connector in a copper mesh grounding assembly for lightning protection of wind turbine blades according to an embodiment of the utility model;

[0019] Figure 6 The present invention is a schematic structural diagram of a grounding component and a copper mesh grounding component for lightning protection of wind turbine blades according to an embodiment of the present invention when the grounding component and the copper mesh are connected and installed.

[0020] Reference numerals:

[0021] 1. Bottom connector; 10. Base plate; 11. Raised column; 12. Through hole; 13. External thread; 14. First annular groove; 15. Accommodating groove; 2. Top connector; 20. Fixed plate; 21. Mounting hole; 22. Internal thread; 23. Second annular groove; 24. Auxiliary groove; 25. Inclined surface; 3. Copper mesh. DETAILED DESCRIPTION

[0022] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0023] See also Figure 1-5 According to an embodiment of the utility model, a copper mesh grounding component for lightning protection of wind turbine blades includes a bottom connector 1 and a top connector 2 which are connected and installed to each other. The bottom connector 1 includes a base plate 10, a raised column 11 is integrally provided at the top center of the base plate 10, a through hole 12 is provided at the center of the raised column 11, and an external thread 13 is provided on the outer wall of the raised column 11. The top connector 2 includes a fixing plate 20, a mounting hole 21 is provided at the center of the fixing plate 20, and an internal thread 22 is provided on the inner wall of the mounting hole 21. The two corners of one end of the copper mesh 3 are folded in half, and then a fixing hole is provided at the folded edge, and the raised column 11 is passed through the fixing hole. At this time, the mounting hole 21 of the fixing plate 20 is installed on the outside of the raised column 11. The fixing plate 20 and the base plate 10 are fixed to the folded copper mesh 3 through the interaction of the external thread 13 and the internal thread 22. The state after installation is as follows Figure 6 As shown, at this time, the copper mesh 3 can be grounded and fixed by installing and connecting the installation nails in the through holes 12.

[0024] In order to increase the contact area between the copper mesh 3 and the base plate 10 and the fixed plate 20, and improve the conductive efficiency, in this embodiment, the top of the base plate 10 is further provided with a first annular groove 14, and the first annular groove 14 is coaxially arranged with the protruding column 11, and the fixed plate 20 is provided with a second annular groove 23 on the side facing the base plate 10, and the second annular groove 23 is arranged opposite to the first annular groove 14. The first annular groove 14 and the second annular groove 23 can be used as embedded grooves. When the copper mesh 3 is installed and fixed, tin wire is first embedded in the first annular groove 14 and the second annular groove 23, and then the area between the base plate 10 and the fixed plate 20 is heated at high temperature by a customized electric heating plate. Because the melting point of the tin wire is very low, the tin wire melts at high temperature and fills the space between the base plate 10 and the fixed plate 20, so that the contact surfaces between the base plate 10 and the fixed plate 20 and the copper mesh 3 are connected by the melted tin wire, thereby increasing the contact surface between each other.

[0025] In order to improve the connection stability between the base plate 10 and the fixed plate 20, in this embodiment, two first annular grooves 14 and second annular grooves 23 are provided. The inner first annular groove 14 and the second annular groove 23 can effectively fill the connection contact surface between the inner copper mesh 3 and the base plate 10 and the fixed plate 20, while the outer first annular groove 14 and the second annular groove 23 can effectively seal and weld the tin wire to the edge between the base plate 10 and the fixed plate 20, thereby reducing the resistance of the entire structure, reducing the risk of lightning breakdown, and improving the conductive efficiency.

[0026] In order to facilitate the subsequent installation of the grounding assembly, in this embodiment, a receiving groove 15 is provided at the bottom of the base plate 10 , and the bottom end of the through hole 12 is connected to the receiving groove 15 .

[0027] In order to facilitate the installation and disassembly of the fixing plate 20, in this embodiment, an auxiliary groove 24 is opened on the top of the fixing plate 20. The auxiliary groove 24 can be adapted to a hexagonal wrench according to actual use. This can make the installation of the fixing plate 20 more convenient and firm, and also facilitate subsequent disassembly.

[0028] In order to enhance the aesthetic effect of the top of the fixing plate 20 , in this embodiment, a slope 25 is provided on the outer side of one end surface of the fixing plate 20 away from the base plate 10 .

[0029] Through the above-mentioned scheme of the utility model, the utility model has a simple and reasonable structure, is easy to use and install, and the first annular groove 14 and the second annular groove 23 can be used as embedded grooves to embed tin wires. After being installed and fixed with the copper mesh 3, the tin wire is melted by high temperature and fills the area between the bottom connector 1 and the top connector 2, which can effectively improve the stability between the copper mesh 3 and the bottom connector 1 and the top connector 2, and can also improve the contact surface between the copper mesh 3 and the bottom connector 1 and the top connector 2, improve the point effect, and the tin wire can also effectively seal and weld the edge between the bottom connector 1 and the top connector 2, thereby reducing the resistance of the entire structure, reducing the risk of lightning breakdown, and improving the conductive efficiency.

[0030] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A copper mesh grounding assembly for lightning protection of wind turbine blades, characterized in that: The invention comprises a bottom connecting member (1) and a top connecting member (2) which are connected and installed with each other, wherein the bottom connecting member (1) comprises a base plate (10), a protruding column (11) is integrally arranged at the center of the top of the base plate (10), a through hole (12) is provided at the center of the protruding column (11), and an external thread (13) is provided on the outer wall of the protruding column (11); the top connecting member (2) comprises a fixing plate (20), a mounting hole (21) is provided at the center of the fixing plate (20), and an internal thread (22) is provided on the inner wall of the mounting hole (21); a first annular groove (14) is also provided at the top of the base plate (10), and the first annular groove (14) is coaxially arranged with the protruding column (11); a second annular groove (23) is provided on a side of the fixing plate (20) facing the base plate (10), and the second annular groove (23) is arranged opposite to the first annular groove (14).

2. A copper mesh grounding assembly for lightning protection of wind turbine blades according to claim 1, characterized in that: The first annular groove (14) and the second annular groove (23) are each provided with two grooves.

3. A copper mesh grounding assembly for lightning protection of wind turbine blades according to claim 1, characterized in that: The bottom of the base plate (10) is provided with a receiving groove (15), and the bottom end of the through hole (12) is connected to the receiving groove (15).

4. A copper mesh grounding assembly for lightning protection of wind turbine blades according to claim 1, characterized in that: An auxiliary groove (24) is formed on the top of the fixing plate (20).

5. The copper mesh grounding assembly for wind turbine blade lightning protection according to claim 1, characterized in that: An inclined surface (25) is formed on the outer side of an end surface of the fixing plate (20) away from the base plate (10).

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