Mountain wind farm wind turbine lightning protection device

Abstract

The utility model discloses a mountain wind farm wind turbine lightning protection device, including the lightning receptor and both ends open connecting seat, the connecting seat is fixedly installed in the first installation groove of blade tip through epoxy resin glue, the open end fixed welding of connecting seat's in the first installation groove has the backplate, the outer wall fixed setting of backplate has the connection stake, the connection stake is fixedly connected with the down conductor in the blade, the end surface fixed connection of lightning receptor has the plug -in block, the utility model discloses through setting connecting seat, plug -in block, sliding block, trapezoidal block, pull rod, nut etc.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection technology for wind turbine generators, specifically a lightning protection device for wind turbine generators in mountainous wind farms. Background Technology

[0002] In mountain wind farms, wind turbine blades are highly susceptible to internal damage from lightning strikes due to their long length and high installation height. Given the high cost of installing and maintaining wind turbine blades, reliable lightning protection devices are necessary. Current technology often installs lightning rods at the blade tips for protection. However, these rods are typically glued to the blade tips with epoxy resin. Since lightning rods have a limited lifespan, their surfaces are damaged by prolonged exposure to lightning. Once damaged, these rods are glued to the blade tips, making replacement and maintenance virtually impossible.

[0003] A search revealed that patent CN222576809U discloses a lightning arrester for wind turbine blades. The connecting part and the lightning arrester achieve electrical conduction through their respective cooperating contact surfaces, which increases the contact area between the two and reduces the impedance of electrical conduction after lightning strikes. This can effectively extend the service life of the lightning arrester. Furthermore, the lightning arrester and the connecting part are detachably connected by bolts, allowing the lightning arrester to be replaced separately, thus reducing the maintenance cost of the entire blade.

[0004] While the above solution facilitates the disassembly and replacement of the lightning arrester at the connection point through bolted connections, reducing blade maintenance costs, in actual use, because wind turbine blades are constantly rotating and the linear velocity of the lightning arrester at the blade tip is very high, the bolts used to connect the lightning arrester and the connection point are subjected to considerable centrifugal force over a long period of time. As the bolts deform due to long-term stress, their tightening force decreases, which can lead to loosening of the lightning arrester, thus affecting the reliability of electrical conduction. Furthermore, there is a risk that the lightning arrester may fall off, which requires improvement. Utility Model Content

[0005] The purpose of this invention is to provide a lightning protection device for wind turbine generators in mountainous wind farms to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lightning protection device for wind turbine generators in a mountainous wind farm includes a lightning arrester and a connector with openings at both ends. The connector is fixedly installed in a first mounting groove at the tip of the blade using epoxy resin adhesive. A back plate is fixedly welded to the open end of the connector in the first mounting groove. A terminal block is fixedly installed on the outer wall of the back plate and is fixedly connected to the down conductor inside the blade. A plug is fixedly connected to the end face of the lightning arrester, and the plug passes through the connector. Two sliders are slidably connected to the end face of the plug inside the connector. Two first inclined surfaces are symmetrically arranged inside the connector. The slider has a second inclined surface on its outer wall facing the first inclined surface. A trapezoidal block is provided between the two sliders, and the sliders are in contact with the inclined surface of the trapezoidal block. A pull rod is installed on the trapezoidal block. The lightning arrester and the plug block have a first through hole. The tip of the lightning arrester has a second mounting groove that communicates with the first through hole. The end of the pull rod away from the trapezoidal block passes through the first through hole into the second mounting groove. A nut is threaded onto the outer wall of the pull rod in the second mounting groove and welded to the pull rod. A plug is welded to the inner wall of the opening end of the second mounting groove.

[0008] As a further embodiment of this utility model: the inner wall of the first mounting groove and the outer wall of the connecting seat are both provided with a number of grooves.

[0009] As a further embodiment of this utility model: a positioning frame is fixedly provided on the inner wall of the first mounting groove, and a positioning groove adapted to the positioning frame is opened on the end face of the back plate.

[0010] As a further embodiment of this utility model: the end face of the insert block is fixedly connected to two first guide rails, and the two inclined surfaces of the trapezoidal block are each fixedly provided with a second guide rail. The slider is provided with a sliding groove that matches the first guide rail and the second guide rail, and the first guide rail and the second guide rail pass through the corresponding sliding groove.

[0011] As a further embodiment of this utility model: multiple guide bars are fixedly provided on the inner wall of the connecting seat at the corresponding position of the trapezoidal block, and guide grooves are provided on the outer wall of the trapezoidal block at the corresponding position of the guide bars, with the guide bars located in the corresponding guide grooves.

[0012] As a further embodiment of this utility model: the trapezoidal block is provided with a second through hole and a positioning hole that are interconnected. The end of the pull rod away from the lightning arrester passes through the second through hole and enters the positioning hole, and the end of the pull rod located in the positioning hole is fixedly connected to a positioning block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model, by setting up a connecting seat, insert block, slider, trapezoidal block, pull rod, nut, etc., only requires tightening the nut in the second mounting groove, and the trapezoidal block will push the two sliders to fit tightly against the first inclined surface inside the connecting seat, thus fixing the lightning arrester. Afterwards, the nut is welded to the pull rod to prevent the nut from loosening on the pull rod. When replacing the lightning arrester in the future, simply saw off the pull rod to pull out the insert block, slider, and trapezoidal block from the connecting seat. The operation is simple and convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a lightning protection device for wind turbine generators in a mountainous wind farm.

[0016] Figure 2 This is a schematic diagram of the trapezoidal block structure in a lightning protection device for wind turbine generators in a mountainous wind farm.

[0017] Figure 3 for Figure 1 A magnified view of a portion of the image.

[0018] The components include: blade 1, first mounting groove 2, positioning frame 3, connecting seat 4, back plate 5, positioning groove 6, wiring post 7, groove 8, epoxy resin adhesive 9, first inclined surface 10, guide strip 11, lightning arrester 12, plug block 13, first through hole 14, second mounting groove 15, plug block 16, first guide rail 17, slider 18, second inclined surface 19, trapezoidal block 20, second guide rail 21, guide groove 22, second through hole 23, positioning hole 24, pull rod 25, positioning block 26, and nut 27. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-3In this embodiment of the utility model, a lightning protection device for a wind turbine generator in a mountain wind farm includes a lightning arrester 12 and a connecting seat 4 with openings at both ends. The connecting seat 4 is fixedly installed in a first mounting groove 2 at the tip of the blade 1 using epoxy resin adhesive 9. A back plate 5 is fixedly welded to the open end of the connecting seat 4 located in the first mounting groove 2. A terminal post 7 is fixedly provided on the outer wall of the back plate 5. The terminal post 7 is fixedly connected to the down conductor inside the blade 1. A plug 13 is fixedly connected to the end face of the lightning arrester 12, and the plug 13 passes through the connecting seat 4. Two sliders 18 are slidably connected to the end face of the plug 13 located inside the connecting seat 4. Two first inclined surfaces 10 are symmetrically arranged inside the connecting seat 4. A second inclined surface 19 is provided on the outer wall of the slider 18 facing the first inclined surface 10. A trapezoidal block 20 is provided between the sliders 18, and the inclined surfaces of the sliders 18 and the trapezoidal block 20 are in contact. A pull rod 25 is installed on the trapezoidal block 20. The lightning arrester 12 and the plug block 13 are provided with a first through hole 14. The tip of the lightning arrester 12 is provided with a second mounting groove 15 that communicates with the first through hole 14. The end of the pull rod 25 away from the trapezoidal block 20 passes through the first through hole 14 into the second mounting groove 15. The outer wall of the pull rod 25 located in the second mounting groove 15 is fitted with a nut 27 by external thread, and the nut 27 is welded and fixed to the pull rod 25. A plug 16 is welded and fixed to the inner wall of the opening end of the second mounting groove 15. The connecting seat 4, back plate 5, terminal block 7, lightning arrester 12, slider 18, trapezoidal block 20, etc. are all made of metal with good conductivity.

[0021] By adopting the above-described solution, when installing the lightning arrester 12, it is only necessary to insert the insert block 13, the slider 18, and the trapezoidal block 20 into the connecting seat 4, and then tighten the nut 27 in the second mounting groove 15. This allows the pull rod 25 to pull the trapezoidal block 20 closer to the insert block 13, thereby pushing the two sliders 18 away from each other. This causes the second inclined surface 19 on the slider 18 to be tightly pressed against the first inclined surface 10 in the connecting seat 4, thus firmly fixing the lightning arrester 12 to the end of the blade 1. Finally, the nut 27 is welded and fixed to the pull rod. 25 is placed on the second mounting groove 15, and the plug 16 is welded into the second mounting groove 15. Then, the weld between the plug 16 and the lightning rod 12 is polished smooth. However, when the lightning rod 12 needs to be replaced, the tip of the lightning rod 12 is cut off from the lightning rod 12 and the pull rod 25 so that the pull rod 25 is separated from the nut 27. Then the pull rod 25 can be moved into the connecting seat 4, so that the two sliders 18 can move. After that, the insert block 13, slider 18 and trapezoidal block 20 can be pulled out from the connecting seat 4. The operation is simple and convenient, and the slider 18 can be reused.

[0022] Specific combination Figure 1In one embodiment of this utility model, the inner wall of the first mounting groove 2 and the outer wall of the connecting seat 4 are provided with a plurality of grooves 8. Epoxy resin adhesive 9 will penetrate into the grooves 8 to greatly improve the reliability of the bonding and fixing of the connecting seat 4 and the blade 1 after curing.

[0023] Specific combination Figure 1 In one embodiment of this utility model, a positioning frame 3 is fixedly provided on the inner wall of the first mounting groove 2, and a positioning groove 6 adapted to the positioning frame 3 is provided on the end face of the back plate 5. The positioning groove 6 and the positioning frame 3 cooperate to facilitate the positioning and installation of the connecting seat 4 in the first mounting groove 2.

[0024] Specific combination Figure 1 In one embodiment of the present invention, the end face of the insert block 13 is fixedly connected to two first guide rails 17, and the two inclined surfaces of the trapezoidal block 20 are fixedly provided with second guide rails 21. The slider 18 is provided with a sliding groove that matches the first guide rails 17 and the second guide rails 21, and the first guide rails 17 and the second guide rails 21 pass through the corresponding sliding grooves.

[0025] The sliding connection between the slider 18 and the trapezoidal block 20 and the insert block 13 can be achieved through the cooperation of the first guide rail 17, the second guide rail 21 and the slide groove, thereby improving the stability of the slider 18 movement.

[0026] Specific combination Figure 1 and Figure 2 In one embodiment of the present invention, a plurality of guide strips 11 are fixedly provided on the inner wall of the connecting seat 4 at the corresponding position of the trapezoidal block 20, and guide grooves 22 are provided on the outer wall of the trapezoidal block 20 at the corresponding position of the guide strips 11, and the guide strips 11 are located in the corresponding guide grooves 22.

[0027] The guide bar 11 and the guide groove 22 work together to guide the trapezoidal block 20 within the connecting seat 4, thereby improving the stability of the movement of the trapezoidal block 20.

[0028] Specific combination Figure 1 In one embodiment of the present invention, the trapezoidal block 20 is provided with a second through hole 23 and a positioning hole 24 that are interconnected. The end of the pull rod 25 away from the lightning arrester 12 passes through the second through hole 23 and enters the positioning hole 24. The end of the pull rod 25 located in the positioning hole 24 is fixedly connected to a positioning block 26.

[0029] By cooperating with the positioning block 26 and the positioning hole 24, a detachable connection can be achieved between the pull rod 25 and the trapezoidal block 20, so that the trapezoidal block 20 can still be reused after the pull rod 25 is cut off, further reducing the maintenance cost of the blade 1.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lightning protection device for wind turbines in a mountain wind farm, characterized in that: The device includes a lightning arrester (12) and a connector (4) with openings at both ends. The connector (4) is fixedly installed in the first mounting groove (2) at the tip of the blade (1) by epoxy resin glue (9). A back plate (5) is fixedly welded to the open end of the connector (4) located in the first mounting groove (2). A terminal block (7) is fixedly provided on the outer wall of the back plate (5). The terminal block (7) is fixedly connected to the down conductor in the blade (1). A plug (13) is fixedly connected to the end face of the lightning arrester (12), and the plug (13) passes through the connector (4). Two sliders (18) are slidably connected to the end face of the plug (13) located in the connector (4). Two first inclined surfaces (10) are symmetrically arranged in the connector (4). The sliders (18) are provided with a first inclined surface (10) on the outer wall facing the first inclined surface (10). Two inclined surfaces (19), a trapezoidal block (20) is provided between the two sliders (18), and the inclined surfaces of the sliders (18) and the trapezoidal block (20) are in contact. A pull rod (25) is installed on the trapezoidal block (20). A first through hole (14) is opened on the lightning arrester (12) and the plug (13). A second mounting groove (15) connected to the first through hole (14) is opened at the tip of the lightning arrester (12). The end of the pull rod (25) away from the trapezoidal block (20) is inserted into the second mounting groove (15) through the first through hole (14). A nut (27) is sleeved on the outer wall of the pull rod (25) in the second mounting groove (15) through external thread. The nut (27) is welded and fixed to the pull rod (25). A plug (16) is welded and fixed to the inner wall of the opening end of the second mounting groove (15).

2. The lightning protection device for wind turbines in mountainous wind farms according to claim 1, characterized in that: The inner wall of the first mounting groove (2) and the outer wall of the connecting seat (4) are provided with several grooves (8).

3. The lightning protection device for wind turbines in mountainous areas according to claim 1, characterized in that: The inner wall of the first mounting groove (2) is fixedly provided with a positioning frame (3), and the end face of the back plate (5) is provided with a positioning groove (6) that is compatible with the positioning frame (3).

4. The lightning protection device for wind turbines in mountainous areas according to claim 1, characterized in that: The end face of the insert (13) is fixedly connected to two first guide rails (17), and the two inclined surfaces of the trapezoidal block (20) are fixedly provided with second guide rails (21). The slider (18) is provided with a sliding groove that matches the first guide rail (17) and the second guide rail (21). The first guide rail (17) and the second guide rail (21) pass through the corresponding sliding groove.

5. A lightning protection device for wind turbine generators in a mountain wind farm according to claim 1, characterized in that: Multiple guide bars (11) are fixedly provided on the inner wall of the connecting seat (4) and at the corresponding position of the trapezoidal block (20). Guide grooves (22) are provided on the outer wall of the trapezoidal block (20) and at the corresponding position of the guide bars (11). The guide bars (11) are located in the corresponding guide grooves (22).

6. A lightning protection device for wind turbine generators in a mountain wind farm according to claim 1, characterized in that: The trapezoidal block (20) has a second through hole (23) and a positioning hole (24) that are interconnected. The end of the pull rod (25) away from the lightning arrester (12) passes through the second through hole (23) into the positioning hole (24), and the end of the pull rod (25) located in the positioning hole (24) is fixedly connected to the positioning block (26).

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