Detachable lightning protection device for wind turbine generator

Abstract

This invention relates to the technical field of wind turbine generators, and in particular to a detachable lightning arrester for wind turbine generators. The device includes a wind turbine nacelle and a lightning arrester mounted on top of the nacelle. An internal support fixing assembly is movably installed inside the mounting frame to fix the lightning arrester to the top of the mounting frame. The internal support fixing assembly includes an internal support frame and the lightning arrester fixedly mounted on top of the internal support frame. A mounting side plate within the internal support fixing assembly extends into the mounting frame and expands. A surrounding clamping assembly is located at the top of the mounting frame. This invention uses a rotating screw in the internal support fixing assembly to drive the mounting side plate to expand or contract, enabling rapid connection and separation of the lightning arrester from the wind turbine nacelle. The surrounding clamping assembly and the internal support fixing assembly together form a dual fixing mechanism, achieving a firm and damage-free clamping. The auxiliary locking assembly directly and effectively resists wind load bending moments, improving the wind resistance performance of the lightning arrester.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine generators, and in particular to a detachable lightning arrester for wind turbine generators. Background Technology

[0002] As tall metal structures, wind turbines are highly susceptible to lightning strikes. The lightning protection device on the top of the nacelle is crucial for protecting the expensive electrical equipment inside. Traditional lightning protection devices typically use welding or flange bolt connections to permanently fix the lightning arrester to the top of the wind turbine nacelle. However, the traditional welding method creates a permanent connection, requiring high-altitude cutting operations when the lightning arrester needs to be inspected or replaced. This is labor-intensive and poses safety risks, and re-welding is necessary afterward, making the process complex. While large flange and bolt connections offer some disassembly capability, the bolts are prone to loosening due to vibration in high-altitude wind load environments, requiring frequent checks and tightening. Furthermore, long-term exposure can cause the bolts to corrode and rust, making disassembly extremely difficult and often requiring forceful destruction. Whether welding or bolting, each maintenance operation consumes a significant amount of time and manpower.

[0003] Secondly, in terms of wind resistance, traditional connection methods suffer from insufficient lateral restraint. Welding or bolt connections primarily provide axial fixation, but for slender rod-shaped lightning rods, strong winds generate enormous lateral forces and vibrations. Traditional fixing points are concentrated at the bottom, making the upper part of the lightning rod a long cantilever beam, which is prone to swaying under wind loads. Long-term swaying can lead to fatigue damage, cracks, or loosening at welded or bolted points, and may also affect the protection range due to excessive displacement at the top of the lightning rod. Furthermore, in terms of proactive adaptation to extreme wind conditions, the fixing strength of all existing fixed connections is determined at the moment of installation, making them a static system. They cannot sense changes in the external environment, nor can they proactively improve their fixing capacity when wind loads increase. When encountering extreme winds far exceeding design values, static connections may fail due to excessive load, causing the lightning rod to bend or even break from the base, resulting in serious accidents. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a detachable lightning protection device for wind turbines.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a detachable lightning arrester for wind turbines, comprising a wind turbine nacelle and a lightning arrester disposed on the top of the wind turbine nacelle, wherein a mounting frame is fixedly installed on the top of the wind turbine nacelle, and an inner support fixing component is movably disposed inside the mounting frame, the inner support fixing component being used to fix the lightning arrester to the top of the mounting frame. The internal support fixing assembly includes an internal support frame and a lightning arrester fixedly installed at the top of the internal support frame. The mounting side plate provided in the internal support fixing assembly enters the interior of the mounting frame and then expands. The top of the mounting bracket is equipped with a surrounding clamping assembly, which is used to clamp the bottom of the lightning arrester. The arc-shaped clamping rods in the surrounding clamping assembly move symmetrically on the outside of the bottom of the lightning arrester. The surrounding clamping assembly includes an arc-shaped base frame fixedly installed at the top of the mounting frame. The arc-shaped base frame is also provided with a horizontal pushing assembly. The pushing frame in the horizontal pushing assembly drives the arc-shaped clamping rod to limit and clamp the bottom of the lightning arrester. The top of the mounting bracket is also equipped with an auxiliary locking component, which is used to reinforce the lightning rod when the wind is strong. The arc-shaped locking ring in the auxiliary locking component locks and clamps the telescopic rod at the bottom of the lightning rod. The auxiliary locking component includes a wind turbine, a locking tube, and a U-shaped fixing plate.

[0006] As a preferred embodiment of the present invention, the inner support fixing assembly further includes a first hinge rod and a second hinge rod. An inner support seat is fixedly installed inside the inner support frame. The inner support seat is movably connected to a support screw. The support screw is threaded through and connected to an inner support block. The two ends of the inner support seat are movably connected to the two ends of the mounting side plate through hinges. The inner support block is movably connected to the mounting side plate through hinges.

[0007] The top of the support screw extends through to the outside of the inner support frame, and a rotating handle is fixedly installed at the top of the support screw. The mounting side plate is movable at both ends of the inner support frame, and a first air hole is opened at the top of the middle end of the mounting side plate. The mounting frame has a mounting groove that matches the size of the mounting side plate, and the mounting side plate is movable in the mounting groove. The top of the mounting frame has an arc-shaped groove, and the bottom of the lightning arrester is movable in the arc-shaped groove. The bottom of the inner support frame has a drainage hole.

[0008] As a preferred technical solution of the present invention, the surrounding clamping assembly further includes a support frame, a support column is fixedly installed inside the arc-shaped base frame, the top of the support column passes through the arc-shaped base frame and is fixedly installed with the support frame, and an arc-shaped clamping rod is movably connected to the support frame through a rotating shaft. A push frame is movably sleeved on the outside of the support column. The push frame is movably connected to a support rod via a rotating shaft. The arc-shaped base frame has a support groove, and the support rod moves through the support groove. The top of the support rod is movably connected to the middle of the arc-shaped clamping rod via a rotating shaft.

[0009] As a preferred embodiment of the present invention, the horizontal pushing assembly includes a fixed frame fixedly installed at the bottom of the arc-shaped base frame. A fixing screw is movably disposed inside the fixed frame. A fixing block is threaded through the fixing screw. A fixing rod is fixedly installed on the top of the fixing block. The fixing rod is fixedly installed at the bottom of the pushing frame by bolts. A fixing groove matching the size of the fixing rod is opened on the top of the fixed frame. The fixing rod moves through the fixing groove. The fixing screw extends through to the outside of the arc-shaped base frame at the end away from the support frame. A support handle is fixedly installed at the top of the fixing screw.

[0010] As a preferred embodiment of the present invention, the auxiliary locking assembly further includes a first toothed disc and a second toothed disc. A rotating shaft is movably connected inside the wind turbine. Several rotating blades are evenly installed on the outer circumference of the rotating shaft and move within the wind turbine. A locking cylinder is connected through the top of the wind turbine. The first toothed disc is fixedly installed on the rotating shaft near the locking cylinder. A support rotating rod is movably arranged inside the locking cylinder. The second toothed disc is fixedly installed on the support rotating rod and has an S-shaped rotating groove. A U-shaped fixing plate is fixedly installed on both sides inside the locking cylinder. A T-shaped connecting block is movably arranged inside the U-shaped fixing plate, and an arc-shaped locking ring is fixedly installed at the top of the T-shaped connecting block. A fixing post is fixedly installed at the bottom of the lightning arrester, and a telescopic rod moves at the bottom of the fixing post. The telescopic rod moves inside the arc-shaped locking ring. Telescopic springs are fixedly installed between the two ends of the U-shaped fixing plate and the T-shaped connecting block, and the first toothed disc and the second toothed disc are movably engaged.

[0011] The inner side of the U-shaped fixing plate is provided with a T-shaped sliding groove, in which a T-shaped slider is slidably connected, and a T-shaped connecting block is fixedly installed on the T-shaped slider. An arc-shaped rotating rod is movably arranged in the S-shaped rotating groove, and the arc-shaped rotating rod is fixedly installed on the T-shaped connecting block. The locking cylinder is provided with a movable groove, and the T-shaped connecting block is movably inserted through the movable groove. A wind power hole is provided at the top of the wind turbine, and a drainage hole is provided at the bottom of the wind turbine, and the drainage hole matches the first wind hole.

[0012] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. In this invention, the rotating screw in the internal support fixing component drives the mounting side plate to open or retract, realizing the rapid connection and separation of the lightning arrester and the wind turbine nacelle. This makes the installation, subsequent maintenance or replacement of the lightning protection device extremely simple, eliminating the need for large welding equipment or complex high-altitude bolting operations, and significantly reducing maintenance time, labor costs and safety risks. The internal support structure has good adaptability to the inner cavity of mounting frames of different sizes and shapes. By adjusting the expansion stroke, it can be compatible with dimensional tolerances within a certain range, improving the versatility and engineering applicability of the device.

[0013] 2. In this invention, the axial force of the screw is efficiently converted into a huge radial expansion force of the mounting side plate through the first hinge and the second hinge rod in the internal support fixing assembly. This makes the mounting side plate form a surface contact with the inner wall of the mounting frame and generate a huge static friction force, which can reliably resist the upward pull force, overturning moment and vibration caused by wind load. The connection rigidity and stability are comparable to the strength of welding.

[0014] 3. In this invention, the lightning arrester rod is laterally clamped by the symmetrically arranged arc-shaped clamping rods in the surrounding clamping assembly, providing a uniform radial constraint force. This greatly enhances the lateral support stiffness of the bottom of the lightning arrester, effectively suppresses its low-frequency swaying and high-frequency vibration under wind load, and avoids material fatigue and loosening of connection points caused by long-term swaying.

[0015] 4. In this invention, a dual fixing mechanism is formed by the surrounding clamping component and the inner support fixing component. The inner support fixing mainly bears the vertical force and bending moment, while the surrounding clamping focuses on controlling the lateral displacement. The two complement each other to form a stable fixing system with one main and one auxiliary component. The safety redundancy is high. The arc-shaped clamping rod and the lightning rod body have arc surface contact, which increases the contact area, reduces the pressure, and avoids damage or indentation to the surface coating of the lightning rod body that may be caused by point contact, thus achieving a firm and non-destructive clamping.

[0016] 5. In this invention, the push frame is driven by a screw drive in the horizontal push assembly. The transmission is precise and has good self-locking properties. The operator can precisely control the clamping degree of the arc-shaped clamping rod by controlling the number of rotations of the handle. This avoids loosening due to insufficient clamping force or deformation of the rod due to excessive clamping force. The horizontal linear motion is efficiently converted into the rotational motion of the clamping rod through the push frame and support rod. The entire transmission chain is simple and efficient. All components are integrated inside the arc-shaped base frame, resulting in a compact structure that does not occupy extra space and is protected from external environmental corrosion.

[0017] 6. In this invention, the auxiliary locking component can utilize the ambient wind energy itself as a power source to achieve an effective response of tightening when the wind is strong and loosening when the wind is weak. It maintains normal fixation under normal wind conditions and automatically activates and strengthens the locking of the lightning arrester under extreme wind conditions, greatly improving the safety and reliability of the device under severe weather conditions. The entire auxiliary locking process is achieved entirely by mechanical structure, without the need for sensors, controllers or external power supply. It has a simple structure, low failure rate, adapts to the harsh outdoor environment of wind farms, is maintenance-free and extremely reliable in operation, and can more directly and effectively resist wind load bending moment, preventing excessive displacement of the top of the lightning arrester, and further improving the wind resistance performance of the lightning arrester. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the structure of the lightning arrester of the present invention; Figure 3 This is a schematic diagram of the internal structure of the inner support frame of the present invention; Figure 4 This is a schematic diagram of the mounting bracket of the present invention; Figure 5 This is a schematic diagram of the internal structure of the arc-shaped base frame of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixing frame of the present invention; Figure 7 This is a schematic diagram of the internal structure of the wind turbine of the present invention; Figure 8 This is a schematic diagram of the internal structure of the locking cylinder of the present invention; Figure 9 This is a schematic diagram of the structure of the spiral-shaped fixing plate of the present invention.

[0019] Among them: 10. Wind turbine nacelle; 11. Lightning arrester; 12. Mounting bracket; 13. Mounting slot; 14. Arc-shaped slot; 15. Drainage hole; 16. Fixed column; 17. Telescopic rod; 20. Internal support frame; 21. Internal support seat; 22. Support screw; 23. Internal support block; 24. Mounting side plate; 25. First hinge rod; 26. Second hinge rod; 27. Rotating handle; 28. First wind hole; 30. Arc-shaped base frame; 31. Support frame; 32. Support column; 33. Arc-shaped clamping rod; 34. Push frame; 35. Support rod; 36. Support slot; 4 0. Fixing frame; 41. Fixing screw; 42. Fixing block; 43. Fixing rod; 44. Fixing groove; 45. Support handle; 50. Wind turbine; 51. Rotating shaft; 52. Rotating blade; 53. First gear plate; 54. Wind power hole; 55. Drain hole; 60. Locking cylinder; 61. Support rotating rod; 62. Second gear plate; 63. S-shaped rotating groove; 64. Arc-shaped rotating rod; 65. Movable groove; 70. U-shaped fixing plate; 71. T-shaped connecting block; 72. Arc-shaped locking ring; 73. T-shaped sliding groove; 74. T-shaped slider; 75. Telescopic spring. Detailed Implementation

[0020] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0021] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a detachable lightning arrester for wind turbines includes a wind turbine nacelle 10 and a lightning arrester 11 mounted on top of the nacelle 10. A mounting frame 12 is fixedly installed on the top of the nacelle 10. An internal support fixing assembly is movably disposed inside the mounting frame 12 to fix the lightning arrester 11 to the top of the mounting frame 12. The internal support fixing assembly includes an internal support frame 20 and the lightning arrester 11 fixedly mounted on the top of the internal support frame 20. A mounting side plate 24 disposed in the internal support fixing assembly enters the interior of the mounting frame 12 and then expands. The internal support fixing assembly also includes... There is a first hinge rod 25 and a second hinge rod 26. An inner support seat 21 is fixedly installed inside the inner support frame 20. The inner support seat 21 has a rectangular structure and is movably connected to a support screw 22. The support screw 22 is threaded through and connected to an inner support block 23. The inner support block 23 matches the internal size of the inner support frame 20 and moves inside the inner support frame 20. The two ends of the inner support seat 21 are movably connected to the two ends of the mounting side plate 24 through hinges. The first hinge rod 25 is movably connected to the two ends of the mounting side plate 24 through hinges. The second hinge rod 26 is movably connected to the inner support block 23 and the mounting side plate 24 through hinges.

[0022] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The top of the support screw 22 extends through to the outside of the inner support frame 20, and a rotating handle 27 is fixedly installed at the top of the support screw 22. The rotating handle 27 is movable at one end away from the arc-shaped base frame 30. The mounting side plate 24 is movable at both ends of the inner support frame 20, and a first air hole 28 is opened at the top of the middle end of the mounting side plate 24. The mounting frame 12 is opened with a mounting groove 13 that matches the size of the mounting side plate 24, and the mounting side plate 24 is movable in the mounting groove 13. An arc-shaped groove 14 is opened at the top of the mounting frame 12, and the bottom of the lightning arrester 11 is movable in the arc-shaped groove 14. A drainage hole 15 is opened at the bottom of the inner support frame 20 to drain residual rainwater.

[0023] See Figure 1 , Figure 2 , Figure 3 and Figure 4When the inner support frame 20 of the inner support fixing assembly is inserted into the square cavity of the mounting bracket 12, the operator rotates the handle 27, causing the support screw 22 inside the inner support frame 20 to rotate. Since the support screw 22 and the inner support block 23 are threadedly connected, and the inner support seat 21 is fixed inside the inner support frame 20, the rotational motion of the support screw 22 is converted into the linear horizontal motion of the inner support block 23. When the inner support block 23 moves horizontally under the drive of the support screw 22, the inner support block 23 will push the second hinge rod 26 hinged to it. The second hinge rod 26 decomposes the horizontal thrust into a force that is decomposed ... The horizontal component of the mounting side plate 24 is pushed outward. At the same time, the first hinge rod 25, which is hinged to the inner support 21 and the mounting side plate 24, is also extended in a coordinated manner, playing a supporting and guiding role. Under the synergistic action of the first hinge rod 25 and the second hinge rod 26, the two mounting side plates 24 are pushed out to both sides with great force, unfolding symmetrically and smoothly like a mechanical expansion bolt, and finally tightly pressed into the mounting groove 13 of the mounting frame 12. The huge friction between the support screw 22 and the inner support block 23 is sufficient to resist the upward pulling force and overturning moment of the lightning arrester 11, realizing a rigid connection without welding or complex bolts.

[0024] See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The mounting frame 12 is provided with a surrounding clamping assembly at the top. The surrounding clamping assembly is used to clamp the bottom of the lightning receiver 11. The arc-shaped clamping rod 33 in the surrounding clamping assembly is symmetrically movable on the outside of the bottom of the lightning receiver 11. The surrounding clamping assembly also includes a support frame 31. A support column 32 is fixedly installed inside the arc-shaped base frame 30. The top of the support column 32 passes through the arc-shaped base frame 30 and is fixedly installed on the support frame 31. The arc-shaped clamping rod 33 is movably connected to the support frame 31 through a rotating shaft. The outer periphery of the arc-shaped clamping rod 33 is coated with anti-rust paint. See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The support column 32 is externally movably sleeved with a pusher frame 34. The pusher frame 34 is movably connected to a support rod 35 via a pivot. The arc-shaped base frame 30 has a support groove 36, and the support rod 35 is movably inserted through the support groove 36. The top of the support rod 35 is movably connected to the middle of the arc-shaped clamping rod 33 via a pivot. By pushing the support rod 35, the arc-shaped clamping rod 33 symmetrically hugs and clamps the bottom of the lightning arrester 11, resulting in a good clamping effect.

[0025] See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6When the pusher 34 is pushed horizontally, the force is transmitted to the arc-shaped clamping rod 33 on the support frame 31 through the support rod 35 hinged to it. The support rod 35, the pusher 34 and the arc-shaped clamping rod 33 together form a lever system. The horizontal movement of the pusher 34 is converted by the support rod 35 into the rotational movement of the arc-shaped clamping rod 33 around its top axis. Under the drive, the two arc-shaped clamping rods 33 symmetrically clamp the bottom rod of the lightning arrester 11 from the left and right sides. This circumferential clamping method provides uniform contact pressure and strong circumferential constraint force, which effectively suppresses the low-frequency vibration and lateral swing of the lightning arrester 11. The fixed installation at the bottom of the lightning arrester 11 forms a second line of defense.

[0026] See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The surrounding clamping assembly includes an arc-shaped base frame 30 fixedly installed at the top of the mounting frame 12. A horizontal pushing assembly is also provided inside the arc-shaped base frame 30. The pushing frame 34 in the horizontal pushing assembly drives the arc-shaped clamping rod 33 to limit and clamp the bottom of the flasher 11. The horizontal pushing assembly includes a fixing frame 40 fixedly installed at the bottom of the arc-shaped base frame 30. A fixing screw 41 is movably provided inside the fixing frame 40. A fixing block 42 is threaded through the fixing screw 41. A fixing rod 43 is fixedly installed on the top of the fixing block 42. The fixing rod 43 is fixedly installed at the bottom of the pushing frame 34 by bolts. A fixing groove 44 matching the size of the fixing rod 43 is opened on the top of the fixing frame 40. The fixing rod 43 moves through the fixing groove 44. The fixing screw 41 extends through to the outside of the arc-shaped base frame 30 at the end away from the support frame 31. A support handle 45 is fixedly installed on the top of the fixing screw 41.

[0027] See Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 The operator rotates the support handle 45, which in turn drives the fixing screw 41 inside the fixing frame 40 to rotate, driving the fixing block 42 of the fixing screw 41 and the fixing rod 43 connected to it to move horizontally. The fixing rod 43 pushes the push frame 34 to slide along the support column 32. When the push frame 34 is pushed horizontally, it transmits the motion to the arc-shaped clamping rod 33 on the support frame 31 through the support rod 35 that is hinged to it. The support rod 35, the push frame 34 and the arc-shaped clamping rod 33 together form a lever system. The horizontal movement of the push frame 34 is converted by the support rod 35 into the rotational movement of the arc-shaped clamping rod 33 around its top axis. Under the drive, the two arc-shaped clamping rods 33 symmetrically clamp the bottom rod of the lightning arrester 11 from the left and right sides.

[0028] See Figure 1 , Figure 4 , Figure 7 , Figure 8 and Figure 9 The top of the mounting bracket 12 is also equipped with an auxiliary locking component. The auxiliary locking component is used to reinforce the lightning arrester 11 when the wind is strong. The arc-shaped locking ring 72 in the auxiliary locking component locks and clamps the telescopic rod 17 at the bottom of the lightning arrester 11. The auxiliary locking component includes a wind turbine 50, a locking cylinder 60, a U-shaped fixing plate 70, a first gear plate 53, and a second gear plate 62. A rotating shaft 51 is movably connected inside the wind turbine 50. Several rotating blades 52 are evenly installed on the outer circumference of the rotating shaft 51 and move within the wind turbine 50. The top of the wind turbine 50 is connected through the locking cylinder 60. The first gear plate 53 is fixedly installed on the rotating shaft 51 near the locking cylinder 60. The inside of the locking cylinder 60... The device is equipped with a support rotating rod 61, and a second gear plate 62 is fixedly installed on the support rotating rod 61. The second gear plate 62 has an S-shaped rotating groove 63, and there are two S-shaped rotating grooves 63. A U-shaped fixing plate 70 is fixedly installed on both sides inside the locking cylinder 60, and a T-shaped connecting block 71 is movably installed inside the U-shaped fixing plate 70. An arc-shaped locking ring 72 is fixedly installed at the top of the T-shaped connecting block 71. A fixing post 16 is fixedly installed at the bottom of the lightning arrester 11, and a telescopic rod 17 is movably installed at the bottom of the fixing post 16. The telescopic rod 17 is movably installed inside the arc-shaped locking ring 72. Telescopic springs 75 are fixedly installed between the two ends of the U-shaped fixing plate 70 and the T-shaped connecting block 71, and the first gear plate 53 and the second gear plate 62 are movably engaged.

[0029] See Figure 1 , Figure 4 , Figure 7 , Figure 8 and Figure 9 The inner side of the U-shaped fixing plate 70 is provided with a T-shaped sliding groove 73, and a T-shaped slider 74 is slidably connected in the T-shaped sliding groove 73. The T-shaped connecting block 71 is fixedly installed on the T-shaped slider 74. An arc-shaped rotating rod 64 is movably provided in the S-shaped rotating groove 63, and the arc-shaped rotating rod 64 is fixedly installed on the T-shaped connecting block 71. The locking cylinder 60 is provided with a movable groove 65, and the T-shaped connecting block 71 is movably inserted through the movable groove 65. The top of the wind turbine 50 is provided with a wind hole 54, and the wind hole 54 blows air onto the rotating blade 52. The bottom of the wind turbine 50 is provided with a drain hole 55, and the drain hole 55 matches the first air hole 28. The water stains remaining in the device are dried and cleaned through the drain hole 55 and the first air hole 28.

[0030] See Figure 1 , Figure 4 , Figure 7 , Figure 8 and Figure 9Airflow enters through the wind tunnel 54 at the top of the wind turbine 50 and exits through the drainage hole 55 at the bottom of the wind turbine 50. The airflow entering the wind tunnel 54 drives the rotating blade 52 inside the wind turbine 50 to rotate. The rotating blade 52 converts wind energy into mechanical energy, driving the rotating shaft 51 and the first toothed disc 53 at its end to rotate. Then the first toothed disc 53 meshes with the second toothed disc 62, causing the second toothed disc 62 to rotate synchronously. The S-shaped rotating groove 63 fixed on the end face of the second toothed disc 62 rotates accordingly. At this time, the arc-shaped rotating rod 64 embedded in the groove is forced to move horizontally under the contour of the S-shaped rotating groove 63. Since the arc-shaped rotating rod 64 is fixed to the T-shaped connecting block 71, and the T-shaped connecting block 71 is restricted in the T-shaped sliding groove 73 of the loop-shaped fixing plate 70 by the T-shaped slider 74, it can only slide in a straight line. Therefore, the continuous rotation of the second toothed disc 62 is cleverly converted by the S-shaped rotating groove 63 into the synchronous movement of the T-shaped connecting block 71 and its top arc-shaped locking ring 72, enabling the arc-shaped locking ring 72 to perform precise linear movement. When the wind force increases, the arc-shaped locking rings 72 on both sides are driven to close, tightly holding the telescopic rod 17 at the bottom of the lightning arrester 11. Under the storage of the existing telescopic spring 75, the arc-shaped locking ring 72 can more effectively resist the bending moment generated by the wind load by increasing the wind force. The greater the wind force, the stronger the locking force and the faster the response. When the wind force decreases, the rotational power disappears, and the arc-shaped locking ring 72 still uses the elasticity of the telescopic spring 75 to clamp and limit the position.

[0031] Working principle: After the inner support frame 20 of the inner support fixing assembly is inserted into the square cavity of the mounting bracket 12, the operator rotates the handle 27, causing the support screw 22 inside the inner support frame 20 to rotate. Since the support screw 22 is threadedly connected to the inner support block 23, and the inner support seat 21 is fixed inside the inner support frame 20, the rotational motion of the support screw 22 is converted into the linear horizontal motion of the inner support block 23. When the inner support block 23 moves horizontally under the drive of the support screw 22, the inner support block 23 will push the second hinge rod 26 hinged to it. The second hinge rod 26 decomposes the horizontal thrust into an outward horizontal component force on the mounting side plate 24. At the same time, it also pushes the inner support seat 21 and the mounting side plate. The first hinge rod 25 of the 24 hinges is also extended in conjunction, playing a supporting and guiding role. Under the synergistic action of the first hinge rod 25 and the second hinge rod 26, the two mounting side plates 24 are forcefully pushed to both sides, unfolding symmetrically and smoothly like a mechanical expansion bolt, and finally tightly pressed into the mounting groove 13 of the mounting frame 12. The huge friction between the support screw 22 and the inner support block 23 is sufficient to resist the upward pull force and overturning moment of the lightning arrester 11, realizing a rigid connection without welding or complex bolts. In addition, the first air hole 28 opened on the mounting side plate 24 reduces wind resistance and avoids becoming a water accumulation tank, working in conjunction with the drainage hole 15 opened at the bottom of the mounting frame 12.

[0032] The operator rotates the support handle 45, which in turn drives the fixing screw 41 inside the fixing frame 40 to rotate, driving the fixing block 42 of the fixing screw 41 and the fixing rod 43 connected to it to move horizontally. The fixing rod 43 pushes the push frame 34 to slide along the support column 32. When the push frame 34 is pushed horizontally, it transmits the motion to the arc-shaped clamping rod 33 on the support frame 31 through the support rod 35 that is hinged to it. The support rod 35, the push frame 34 and the arc-shaped clamping rod 33 together form a lever system. The horizontal movement of the push frame 34 is converted by the support rod 35 into the rotational movement of the arc-shaped clamping rod 33 around its top axis. Under the drive, the two arc-shaped clamping rods 33 symmetrically clamp the bottom rod of the lightning arrester 11 from the left and right sides. This circumferential clamping method provides uniform contact pressure and strong circumferential constraint force, effectively suppressing the low-frequency vibration and lateral swing of the lightning arrester 11. The fixed installation at the bottom of the lightning arrester 11 forms a second line of defense.

[0033] When the outside wind force increases, the airflow enters through the wind power hole 54 at the top of the wind turbine 50 and exits through the drainage hole 55 at the bottom of the wind turbine 50. The airflow entering the wind power hole 54 drives the rotating blade 52 inside the wind turbine 50 to rotate. The rotating blade 52 converts wind energy into mechanical energy, driving the rotating shaft 51 and the first toothed disc 53 at its end to rotate. Then, the first toothed disc 53 meshes with the second toothed disc 62, causing the second toothed disc 62 to rotate synchronously. The S-shaped rotating groove 63 fixed to the end face of the second toothed disc 62 rotates accordingly. At this time, the arc-shaped rotating rod 64 embedded in the groove is forced to move horizontally under the contour of the S-shaped rotating groove 63. Since the arc-shaped rotating rod 64 is fixed to the T-shaped connecting block 71, and the T-shaped connecting block 71 is connected by a T-shaped sliding block... Block 74 is confined within the T-shaped groove 73 of the U-shaped fixed plate 70, allowing only linear sliding. Therefore, the continuous rotational motion of the second toothed disc 62 is cleverly converted by the S-shaped rotating groove 63 into the synchronous motion of the T-shaped connecting block 71 and its top arc-shaped locking ring 72, enabling the arc-shaped locking ring 72 to perform precise linear motion. When the wind force increases, the arc-shaped locking rings 72 on both sides are driven to close, tightly holding the telescopic rod 17 at the bottom of the lightning arrester 11. Under the stored force of the existing telescopic spring 75, the arc-shaped locking ring 72 can more effectively resist the bending moment generated by the wind load by increasing the wind force. The greater the wind force, the stronger the locking force and the faster the response. When the wind force decreases, the rotational power disappears, and the arc-shaped locking ring 72 still uses the elasticity of the telescopic spring 75 to clamp and limit the position.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A detachable lightning arrester for wind turbine generators, comprising a wind turbine nacelle (10) and a lightning arrester (11) disposed on the top of the wind turbine nacelle (10), characterized in that, The top of the wind turbine nacelle (10) is fixedly installed with a mounting frame (12), and an inner support fixing component is movably arranged inside the mounting frame (12). The inner support fixing component is used to fix the lightning arrester (11) to the top of the mounting frame (12). The internal support fixing assembly includes an internal support frame (20) and a lightning rod (11) fixedly installed at the top of the internal support frame (20). The mounting side plate (24) provided in the internal support fixing assembly enters into the mounting frame (12) and is then opened. The mounting bracket (12) is provided with a surrounding clamping assembly at the top. The surrounding clamping assembly is used to clamp the bottom of the lightning arrester (11). The arc-shaped clamping rod (33) provided in the surrounding clamping assembly moves symmetrically on the outside of the bottom of the lightning arrester (11). The surrounding clamping assembly includes an arc-shaped base frame (30) fixedly installed at the top of the mounting frame (12). The arc-shaped base frame (30) is also provided with a horizontal pushing assembly. The pushing frame (34) provided in the horizontal pushing assembly drives the arc-shaped clamping rod (33) to perform a limiting clamping on the bottom of the flasher (11). The top of the mounting bracket (12) is also provided with an auxiliary locking component. The auxiliary locking component is used to reinforce the lightning rod (11) when the wind is strong. The arc-shaped locking ring (72) in the auxiliary locking component locks and clamps the telescopic rod (17) at the bottom of the lightning rod (11). The auxiliary locking component includes a wind turbine (50), a locking tube (60), and a U-shaped fixing plate (70).

2. The detachable lightning arrester for wind turbines according to claim 1, characterized in that, The inner support fixing assembly also includes a first hinge rod (25) and a second hinge rod (26). An inner support seat (21) is fixedly installed inside the inner support frame (20). The inner support seat (21) is movably connected to a support screw (22). The support screw (22) is threaded through an inner support block (23). The two ends of the inner support seat (21) are movably connected to the two ends of the mounting side plate (24) via hinges. The inner support block (23) is movably connected to the mounting side plate (24) via hinges. The second hinge rod (26) is movably connected to the mounting side plate (24) via hinges.

3. A detachable lightning arrester for wind turbines according to claim 2, characterized in that, The top of the support screw (22) extends through to the outside of the inner support frame (20), and a rotating handle (27) is fixedly installed at the top of the support screw (22). The mounting side plate (24) is movable at both ends of the inner support frame (20), and a first air hole (28) is opened at the top of the middle end of the mounting side plate (24). The mounting bracket (12) has a mounting groove (13) that matches the size of the mounting side plate (24), and the mounting side plate (24) moves in the mounting groove (13). The top of the mounting bracket (12) has an arc groove (14), and the bottom of the lightning arrester (11) moves in the arc groove (14). The bottom of the inner support frame (20) has a drainage hole (15).

4. A detachable lightning arrester for wind turbines according to claim 1, characterized in that, The surrounding clamping assembly also includes a support frame (31), and a support column (32) is fixedly installed inside the arc-shaped base frame (30). The top of the support column (32) passes through the arc-shaped base frame (30) and is fixedly installed with the support frame (31). An arc-shaped clamping rod (33) is movably connected to the support frame (31) via a rotating shaft. The support column (32) is movably sleeved with a pusher frame (34), and the pusher frame (34) is movably connected to a support rod (35) via a pivot. The arc-shaped base frame (30) has a support groove (36), and the support rod (35) moves through the support groove (36). The top of the support rod (35) is movably connected to the middle of the arc-shaped clamping rod (33) via a pivot.

5. A detachable lightning arrester for wind turbines according to claim 1, characterized in that, The horizontal pushing assembly includes a fixed frame (40) fixedly installed at the bottom of the arc-shaped base frame (30). A fixed screw (41) is movably installed inside the fixed frame (40). A fixed block (42) is threaded through the fixed screw (41). A fixed rod (43) is fixedly installed on the top of the fixed block (42), and the fixed rod (43) is fixedly installed at the bottom of the pushing frame (34) by bolts.

6. A detachable lightning arrester for wind turbines according to claim 1, characterized in that, The top of the fixing frame (40) is provided with a fixing groove (44) that matches the size of the fixing rod (43), and the fixing rod (43) moves through the fixing groove (44). The fixing screw (41) extends through to the outside of the arc-shaped base frame (30) at the end away from the support frame (31), and a support handle (45) is fixedly installed at the top of the fixing screw (41).

7. A detachable lightning arrester for wind turbines according to claim 3, characterized in that, The auxiliary locking assembly also includes a first toothed disc (53) and a second toothed disc (62). A rotating shaft (51) is movably connected inside the wind turbine (50). Several rotating blades (52) are evenly installed on the outer periphery of the rotating shaft (51), and the rotating blades (52) move in the wind turbine (50). A locking cylinder (60) is connected through the top of the wind turbine (50). The first toothed disc (53) is fixedly installed on the rotating shaft (51) near the locking cylinder (60). The locking cylinder (60) is movably provided with a support rotating rod (61), the second gear plate (62) is fixedly installed on the support rotating rod (61), the second gear plate (62) is provided with an S-shaped rotating groove (63), the spiral fixed plate (70) is fixedly installed on both sides inside the locking cylinder (60), and the spiral fixed plate (70) is movably provided with a T-shaped connecting block (71), and the arc-shaped locking ring (72) is fixedly installed at the top of the T-shaped connecting block (71). The bottom of the lightning arrester (11) is fixedly installed with a fixed column (16), and the telescopic rod (17) is movable at the bottom of the fixed column (16). The telescopic rod (17) is movable inside the arc-shaped locking ring (72). The two ends of the spiral fixed plate (70) are fixedly installed with telescopic springs (75) between the T-shaped connecting block (71), and the first gear plate (53) and the second gear plate (62) are movably meshed.

8. A detachable lightning arrester for wind turbines according to claim 7, characterized in that, The inner side of the U-shaped fixing plate (70) is provided with a T-shaped sliding groove (73), a T-shaped slider (74) is slidably connected in the T-shaped sliding groove (73), and a T-shaped connecting block (71) is fixedly installed on the T-shaped slider (74). An arc-shaped rotating rod (64) is movably provided in the S-shaped rotating groove (63), and the arc-shaped rotating rod (64) is fixedly installed on the T-shaped connecting block (71). The locking cylinder (60) has a movable groove (65), and the T-shaped connecting block (71) is movably inserted in the movable groove (65). The top of the wind turbine (50) has a wind hole (54), and the bottom of the wind turbine (50) has a drain hole (55), and the drain hole (55) matches the first wind hole (28).

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