Lightning protection column porcelain insulator with built-in annular discharge gap

Abstract

The application belongs to the technical field of power distribution equipment, and particularly relates to a lightning protection column type porcelain insulator with a built-in annular discharge gap. The annular electrode of the lightning protection column type porcelain insulator is prone to pollution, which leads to a decrease in the discharge voltage, causes mis-discharge, accelerates damage and increases operation and maintenance costs. The present application discloses the following scheme, which comprises a core rod, an insulator body is arranged on the outer wall of the core rod, and a setting frame is fixedly connected to the lower end of the outer wall of the core rod. The lightning protection column type porcelain insulator with a built-in annular discharge gap has the advantages that the arc surface cleaning plate is driven by the wind to rotate along the surface of the annular electrode by using the lightning protection cleaning assembly, and the plurality of bristles on the arc surface cleaning plate clean the dust and impurities on the annular electrode in the process, so as to ensure the cleanliness of the surface of the annular electrode, thereby avoiding the decrease in the discharge voltage of the gap caused by the dust on the surface of the annular electrode, and preventing the early discharge or mis-triggering. The insulator is not damaged, and the power equipment is protected.

Description

Technical Field

[0001] This invention relates to the field of power system distribution equipment technology, and in particular to a lightning protection post-type porcelain insulator with a built-in annular discharge gap. Background Technology

[0002] Lightning protection post-type porcelain insulators are columnar electrical insulation devices made of ceramic materials. They not only provide electrical insulation to support and isolate conductors, but also have lightning protection functions. Through built-in or additional lightning protection devices, they absorb and divert lightning current to prevent lightning overvoltage from damaging the power system. They are mainly used in outdoor power facilities such as high-voltage transmission lines and substations, especially in areas with frequent lightning activity, to ensure the safe and stable operation of the power grid.

[0003] Existing lightning protection post-type porcelain insulators with built-in annular discharge gaps have their annular electrodes exposed to the atmosphere for a long time. The surface is prone to adhering to pollutants such as dust and salt spray. This can cause the discharge voltage of the gap to drop, leading to premature discharge or false triggering. This not only accelerates the damage to the insulator itself, but also increases the operation and maintenance costs. Summary of the Invention

[0004] This invention discloses a lightning protection post-type porcelain insulator with a built-in annular discharge gap, aiming to solve the technical problem in the prior art where the annular electrode of the lightning protection post-type porcelain insulator is easily contaminated, leading to a drop in its discharge voltage, causing false discharge, thereby accelerating damage and increasing operation and maintenance costs.

[0005] The present invention proposes a lightning protection post-type porcelain insulator with a built-in annular discharge gap, comprising a core rod, an insulator body being disposed on the outer wall of the core rod, a mounting frame being fixedly connected to the lower outer wall of the core rod, an annular electrode being disposed on the outer wall of the core rod located below the insulator body, an adjustment component being disposed on the upper outer wall of the core rod, and a lightning protection cleaning component being disposed on the outer wall of the core rod located below the annular electrode. The lightning protection cleaning component includes a cleaning sleeve plate, which is connected to the outer wall of the core rod located below the annular electrode via a bearing. A fixed shaft is fixedly connected to the inner wall of one end opening of the cleaning sleeve plate, and a cleaning arm is connected to the outer wall of the fixed shaft via a bearing. An arc-shaped cleaning plate is connected to the end of the cleaning arm away from the fixed shaft via a bearing. Multiple bristles are evenly spaced on the inner wall of the arc surface of the arc-shaped cleaning plate, and the multiple bristles are in contact with the surface of the annular electrode.

[0006] In a preferred embodiment, two torsion springs are equally spaced on the outer wall of the fixed shaft. One end of the two torsion springs is fixedly connected to the cleaning arm, and the other end of the two torsion springs is fixedly connected to the inner wall of the opening of the cleaning sleeve. The core rod is located on the lower outer wall of the cleaning sleeve and is connected to a connecting plate via a bearing. The upper side of the connecting plate is fixedly connected to the lower end of the cleaning sleeve.

[0007] In a preferred embodiment, an insulating chamber is fixedly connected to the upper side of one end of the connecting plate. The insulating chamber is located directly below the cleaning arm, and two fixing plates are fixedly connected at equal intervals inside the insulating chamber.

[0008] In a preferred embodiment, rotating holes are provided on opposite sides of the two fixed plates, and the same rotating shaft is connected inside the two rotating holes through bearings. A drive motor is fixedly connected to one side of one of the fixed plates, and the drive end of the drive motor is connected to one end of the rotating shaft through a coupling.

[0009] In a preferred embodiment, a guide rope plate is fixedly connected to one side of the insulating chamber, and a pull rope is wound around the outer wall of the rotating shaft. The ends of the pull rope pass through the insulating chamber and the guide rope plate respectively and are fixedly connected to the cleaning arm.

[0010] In a preferred embodiment, a driven ratchet is fixedly connected to the lower side of the connecting plate, the driven ratchet is sleeved on the outer wall of the mandrel, and a U-shaped fixing plate is fixedly connected to one side of the mounting frame. A drive shaft is connected to the opening of the U-shaped fixing plate through a bearing.

[0011] In a preferred embodiment, the drive shaft is fixedly connected at equal intervals to the outer wall inside the opening of the U-shaped fixed plate with multiple drive fans, and a drive ratchet is fixedly connected to the outer wall of the upper end of the drive shaft on the U-shaped fixed plate, with the drive ratchet meshing with the driven ratchet.

[0012] In a preferred embodiment, the adjustment assembly includes a sliding disc, which is connected to the upper outer wall of the mandrel via a bearing, and a sliding block is slidably connected to the outer wall of the sliding disc.

[0013] In a preferred embodiment, one end of the sliding block is fixedly connected to a perforated slide plate, and a sliding plate is slidably connected inside the perforated slide plate. The sliding plate and the perforated slide plate can be fixed together by bolts. A perforated rod is fixedly connected to one side of the sliding plate, and a sliding arc-initiating rod is slidably connected to the outer wall of the perforated rod. The sliding arc-initiating rod and the perforated rod can be fixed together by bolts.

[0014] In a preferred embodiment, a ratchet ring is fixedly connected to the upper side of the sliding disc. Two sliding holes are equally spaced on the inner wall of the other end of the sliding block. Two limiting rods are slidably connected inside the two sliding holes. One end of the two limiting rods is fixedly connected to the same ratchet block, which engages with the ratchet ring. The outer wall of the other end of the two limiting rods is respectively fitted with compression springs. One end of the two compression springs is fixedly connected to the sliding block, and the other end of the two compression springs is fixedly connected to the inner wall of one end of the corresponding limiting rod.

[0015] As can be seen from the above, the lightning protection post-type porcelain insulator with built-in annular discharge gap provided by the present invention utilizes the lightning protection cleaning component to rotate the arc-shaped cleaning plate along the surface of the annular electrode under the drive of wind. During this process, multiple bristles on the arc-shaped cleaning plate clean the dust and impurities on the annular electrode, thereby ensuring the cleanliness of the annular electrode surface. This avoids premature discharge or false triggering caused by the drop in discharge voltage of the gap due to dust accumulation on the surface of the annular electrode, ensuring that the insulator is not damaged while protecting the power equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the lightning protection post-type porcelain insulator with a built-in annular discharge gap proposed in this invention. Figure 2 This is a front view schematic diagram of the lightning protection post-type porcelain insulator with a built-in annular discharge gap proposed in this invention. Figure 3 This is a schematic diagram of the overall structure of the lightning protection cleaning component of the lightning protection post-type porcelain insulator with built-in annular discharge gap proposed in this invention. Figure 4 This is an exploded structural diagram of the lightning protection cleaning component of the lightning protection post-type porcelain insulator with built-in annular discharge gap proposed in this invention. Figure 5 This is a schematic cross-sectional view of the internal structure of the insulating chamber in the lightning protection cleaning component of the lightning protection post-type porcelain insulator with built-in annular discharge gap proposed in this invention. Figure 6 This is a schematic diagram of the overall structure of the adjustment assembly of the lightning protection post-type porcelain insulator with built-in annular discharge gap proposed in this invention. Figure 7 This is a schematic cross-sectional view of the sliding block in the adjusting assembly of the lightning protection post-type porcelain insulator with built-in annular discharge gap proposed in this invention.

[0017] In the diagram: 1. Core rod; 2. Insulator body; 3. Lightning protection cleaning assembly; 301. Arc-shaped cleaning plate; 302. Cleaning arm; 303. Driven ratchet; 304. Drive fan; 305. Drive ratchet; 306. Cleaning sleeve; 307. Brush bristles; 308. Fixed shaft; 309. Insulation chamber; 310. Drive shaft; 311. U-shaped fixed plate; 312. Connecting plate; 313. Torsion spring; 314. Tension... 315. Rope; 316. Rope guide plate; 317. Drive motor; 318. Rotating shaft; 319. Fixing plate; 4. Setting frame; 5. Annular electrode; 6. Adjustment assembly; 601. Slide disc; 602. Perforated slide plate; 603. Sliding plate; 604. Perforated rod; 605. Sliding arc-initiating rod; 606. Ratchet ring; 607. Compression spring; 608. Sliding block; 609. Limiting rod; 610. Ratchet block. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] The lightning protection post-type porcelain insulator with built-in annular discharge gap disclosed in this invention is mainly used in scenarios where the annular electrode of the lightning protection post-type porcelain insulator is easily contaminated, resulting in a drop in its discharge voltage, causing false discharge, thereby accelerating damage and increasing operation and maintenance costs.

[0020] Reference Figures 1-5 A lightning protection post-type porcelain insulator with a built-in annular discharge gap includes a core rod 1. An insulator body 2 is provided on the outer wall of the core rod 1. A mounting frame 4 is fixedly connected to the lower outer wall of the core rod 1. An annular electrode 5 is provided on the outer wall of the core rod 1 located below the insulator body 2. An adjustment component 6 is provided on the upper outer wall of the core rod 1. A lightning protection cleaning component 3 is provided on the outer wall of the core rod 1 located below the annular electrode 5. The lightning protection cleaning component 3 includes a cleaning sleeve 306. The cleaning sleeve 306 is connected to the outer wall of the core rod 1 located below the annular electrode 5 through a bearing. A fixed shaft 308 is fixedly connected to the inner wall of the opening at one end of the cleaning sleeve 306. A cleaning arm 302 is connected to the outer wall of the fixed shaft 308 through a bearing. An arc-shaped cleaning plate 301 is connected to the end of the cleaning arm 302 away from the fixed shaft 308 through a bearing. Multiple bristles 307 are evenly spaced on the arc-shaped inner wall of the arc-shaped cleaning plate 301. The multiple bristles 307 are in contact with the surface of the annular electrode 5.

[0021] In this invention, two torsion springs 313 are equally spaced on the outer wall of the fixed shaft 308. One end of the two torsion springs 313 is fixedly connected to the cleaning arm 302, and the other end of the two torsion springs 313 is fixedly connected to the inner wall of the opening of the cleaning sleeve plate 306. The core rod 1 is located on the lower outer wall of the cleaning sleeve plate 306 and is connected to the connecting plate 312 by a bearing. The upper side of the connecting plate 312 is fixedly connected to the lower end of the cleaning sleeve plate 306.

[0022] In this invention, an insulating chamber 309 is fixedly connected to the upper side of one end of the connecting plate 312. The insulating chamber 309 is located directly below the cleaning arm 302. Two fixing plates 318 are fixedly connected at equal intervals inside the insulating chamber 309.

[0023] In this invention, two fixed plates 318 are provided with rotating holes on opposite sides, and the same rotating shaft 317 is connected inside the two rotating holes through bearings. A drive motor 316 is fixedly connected to one side of one of the fixed plates 318, and the drive end of the drive motor 316 is connected to one end of the rotating shaft 317 through a coupling.

[0024] In this invention, a guide rope plate 315 is fixedly connected to one side of the insulating chamber 309, and a pull rope 314 is wound around the outer wall of the rotating shaft 317. The ends of the pull rope 314 pass through the insulating chamber 309 and the guide rope plate 315 respectively and are fixedly connected to the cleaning arm 302.

[0025] In this invention, a driven ratchet 303 is fixedly connected to the lower side of the connecting plate 312. The driven ratchet 303 is sleeved on the outer wall of the mandrel 1. A U-shaped fixing plate 311 is fixedly connected to one side of the mounting frame 4. A drive shaft 310 is connected to the opening of the U-shaped fixing plate 311 through a bearing.

[0026] In this invention, a plurality of drive fans 304 are fixedly connected at equal intervals to the outer wall of the drive shaft 310 located inside the opening of the U-shaped fixed plate 311. A drive ratchet 305 is fixedly connected to the outer wall of the upper end of the drive shaft 310 located on the U-shaped fixed plate 311. The drive ratchet 305 meshes with the driven ratchet 303.

[0027] Specifically, when it is necessary to clean the dust accumulated on the annular electrode 5, the drive fan 304 can be rotated by wind power. Since the blades of the drive fan 304 have bidirectional air grooves, it can rotate under wind power from different directions. Driven by the drive fan 304, the drive shaft 310 drives the drive ratchet 305 to rotate. Since the driven ratchet 303 meshes with the drive ratchet 305, the driven ratchet 303 rotates. Since the driven ratchet 303 is connected to the cleaning sleeve 306 and the connecting plate 312, under the action of the driven ratchet 303, the cleaning sleeve 306 drives the cleaning arm 302, and the arc-shaped cleaning plate 301 rotates along the surface of the annular electrode 5. During this process, the multiple bristles 307 on the arc-shaped cleaning plate 301 clean the dust and impurities on the annular electrode 5. When cleaning of the annular electrode 5 is not required, the rotating shaft 317 can be rotated by the drive motor 316, thereby winding the pull rope 314. As the pull rope 314 is wound, the cleaning arm 302 connected to it overcomes the torsion spring 313 and rotates along the fixed shaft 308, thereby moving the arc-shaped cleaning plate 301 away from the annular electrode 5 and the discharge gap.

[0028] In specific application scenarios, when an insulator is struck by lightning, the discharge gap between the sliding arc-starting rod 605 and the annular electrode 5 is broken down, forming a short-circuit channel, releasing the lightning current to the ground, preventing the insulator from being broken down and damaged, thus protecting the power equipment. Multiple bristles 307 on the arc-shaped cleaning plate 301 clean dust and impurities on the annular electrode 5, ensuring the surface of the annular electrode 5 is clean. This prevents premature discharge or false triggering caused by a drop in the discharge voltage of the gap due to dust accumulation on the surface of the annular electrode 5, ensuring the insulator is not damaged while protecting the power equipment. Furthermore, multiple torsion springs 313 ensure that the arc-shaped cleaning plate 301 remains in close contact with the surface of the annular electrode 5 during rotation, improving cleaning efficiency. By keeping the arc-shaped cleaning plate 301 away from the annular electrode 5 and the discharge gap, it prevents spontaneous combustion caused by the high temperature generated during discharge due to prolonged contact between the arc-shaped cleaning plate 301 and the annular electrode 5, while ensuring the normal discharge process of the annular electrode 5.

[0029] Reference Figures 1-7 In a preferred embodiment, the adjusting component 6 includes a sliding disc 601, which is connected to the upper outer wall of the mandrel 1 via a bearing, and a sliding block 608 is slidably connected to the outer wall of the sliding disc 601.

[0030] In this invention, a perforated slide plate 602 is fixedly connected to one end of the sliding block 608, and a sliding plate 603 is slidably connected inside the perforated slide plate 602. The sliding plate 603 and the perforated slide plate 602 can be fixed with bolts. A perforated rod 604 is fixedly connected to one side of the sliding plate 603, and a sliding arc-initiating rod 605 is slidably connected to the outer wall of the perforated rod 604. The sliding arc-initiating rod 605 and the perforated rod 604 can be fixed with bolts.

[0031] In this invention, a ratchet ring 606 is fixedly connected to the upper side of the sliding disc 601. Two sliding holes are equally spaced on the inner wall of the other end of the sliding block 608. Two limiting rods 609 are slidably connected inside the two sliding holes. One end of the two limiting rods 609 is fixedly connected to the same ratchet block 610. The ratchet block 610 is engaged with the ratchet ring 606. The outer wall of the other end of the two limiting rods 609 is respectively fitted with a compression spring 607. One end of the two compression springs 607 is fixedly connected to the sliding block 608, and the other end of the two compression springs 607 is fixedly connected to the inner wall of one end of the corresponding limiting rod 609.

[0032] Specifically, since the sliding arc-initiating rod 605 slides on the outer wall of the perforated rod 604 and can be fixed to it by bolts, the horizontal displacement of the sliding arc-initiating rod 605 can be adjusted. The perforated rod 604 is fixedly connected to the sliding plate 603. Since the sliding plate 603 slides on the perforated slide plate 602 and can be fixed to it by bolts, the vertical displacement of the sliding arc-initiating rod 605 can be adjusted.

[0033] In specific application scenarios, the sliding arc-initiating rod 605 can be displaced in both horizontal and vertical directions, thereby adjusting the discharge gap distance between the sliding arc-initiating rod 605 and the annular electrode 5. This adapts to different thunderstorm intensity areas and improves efficiency. Simultaneously, since the sliding block 608 slides on the sliding groove disc 601, the sliding arc-initiating rod 605 can rotate along the outer wall of the insulator body 2, adapting to different installation environments and improving installation efficiency. Furthermore, with the ratchet block 610 and the ratchet ring 606 engaging with it, combined with the compression spring 607, the sliding arc-initiating rod 605 can be stably locked in place without hindering its rotation, preventing instability in the fit between the annular electrode 5 and the rod due to the rotation of the sliding arc-initiating rod 605.

[0034] Working principle: When an insulator is struck by lightning, the discharge gap between the sliding arc-starting rod 605 and the annular electrode 5 is broken down, forming a short-circuit channel, releasing the lightning current to the ground, preventing the insulator from being damaged by breakdown, thereby protecting the power equipment. Since the sliding arc-starting rod 605 slides on the outer wall of the perforated rod 604 and can be fixed to it with bolts, the horizontal displacement of the sliding arc-starting rod 605 can be adjusted. The perforated rod 604 is fixedly connected to the sliding plate 603, which slides on the perforated sliding groove plate 602 and can be fixed to it with bolts, thereby allowing the vertical displacement adjustment of the sliding arc-starting rod 605. During this process, the horizontal displacement of the sliding arc-starting rod 605 can be adjusted. The sliding arc-initiating rod 605 and the annular electrode 5 can be adjusted by the vertical displacement, thus adapting to different thunderstorm intensity areas and improving efficiency. At the same time, since the sliding block 608 slides on the sliding groove disk 601, the sliding arc-initiating rod 605 can rotate along the outer wall of the insulator body 2, thus adapting to different installation environments and improving installation efficiency. Meanwhile, with the ratchet block 610 and the ratchet ring 606 that engages with it, combined with the compression spring 607, the sliding arc-initiating rod 605 can be stably locked after it is adjusted to the correct position without hindering its rotation, thus preventing instability in the fit between the annular electrode 5 and the sliding arc-initiating rod 605 due to the rotation of the sliding arc-initiating rod 605. When it is necessary to clean the dust accumulated on the annular electrode 5, the drive fan 304 can be rotated by wind power. Since the blades of the drive fan 304 have bidirectional air grooves, it can rotate under wind forces from different directions. Driven by the drive fan 304, the drive shaft 310 drives the drive ratchet 305 to rotate. Since the driven ratchet 303 meshes with the drive ratchet 305, the driven ratchet 303 rotates. Because the driven ratchet 303 is connected to the cleaning sleeve 306 and the connecting plate 312, the cleaning sleeve 306 is driven by the action of the driven ratchet 303. When cleaning arm 302 is in operation, the arc-shaped cleaning plate 301 rotates along the surface of the annular electrode 5. During this process, multiple bristles 307 on the arc-shaped cleaning plate 301 clean the dust and impurities on the annular electrode 5, thereby ensuring the cleanliness of the surface of the annular electrode 5. This prevents premature discharge or false triggering caused by the drop in discharge voltage of the gap due to dust accumulation on the surface of the annular electrode 5, ensuring that the insulator is not damaged while protecting the power equipment. In addition, under the action of multiple torsion springs 313, the arc-shaped cleaning plate 301 is kept in close contact with the surface of the annular electrode 5 during the rotation process, improving the cleaning efficiency. When cleaning of the annular electrode 5 is not required, the rotating shaft 317 can be rotated by the drive motor 316, thereby winding the pull rope 314. As the pull rope 314 is wound, the cleaning arm 302 connected to it overcomes the torsion spring 313 and rotates along the fixed shaft 308, thereby moving the arc-shaped cleaning plate 301 away from the annular electrode 5 and the discharge gap. This prevents the arc-shaped cleaning plate 301 from contacting the annular electrode 5 for a long time, which could cause high temperatures during the discharge process and lead to spontaneous combustion. At the same time, it ensures that the discharge process of the annular electrode 5 can proceed normally.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lightning protection post-type porcelain insulator with a built-in annular discharge gap, comprising a core rod (1), characterized in that, The outer wall of the core rod (1) is provided with an insulator body (2), and a mounting frame (4) is fixedly connected to the lower outer wall of the core rod (1). An annular electrode (5) is provided on the outer wall of the core rod (1) located below the insulator body (2). An adjustment component (6) is provided on the upper outer wall of the core rod (1). A lightning protection cleaning component (3) is provided on the outer wall of the core rod (1) located below the annular electrode (5). The lightning protection cleaning component (3) includes a cleaning sleeve (306), which is connected to the core rod via a bearing. (1) On the outer wall of the lower side of the ring electrode (5), a fixed shaft (308) is fixedly connected to the inner wall of the cleaning sleeve (306) at one end. The outer wall of the fixed shaft (308) is connected to a cleaning arm (302) through a bearing. The end of the cleaning arm (302) away from the fixed shaft (308) is connected to an arc-shaped cleaning plate (301) through a bearing. Multiple bristles (307) are evenly spaced on the inner wall of the arc surface of the arc-shaped cleaning plate (301). The multiple bristles (307) are in contact with the surface of the ring electrode (5).

2. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 1, characterized in that, Two torsion springs (313) are evenly spaced on the outer wall of the fixed shaft (308). One end of the two torsion springs (313) is fixedly connected to the cleaning arm (302), and the other end of the two torsion springs (313) is fixedly connected to the inner wall of the opening of the cleaning sleeve plate (306). The core rod (1) is located on the lower outer wall of the cleaning sleeve plate (306) and is connected to the connecting plate (312) through the bearing. The upper side of the connecting plate (312) is fixedly connected to the lower end of the cleaning sleeve plate (306).

3. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 2, characterized in that, An insulating chamber (309) is fixedly connected to the upper side of one end of the connecting plate (312). The insulating chamber (309) is located directly below the cleaning arm (302). Two fixing plates (318) are fixedly connected at equal intervals inside the insulating chamber (309).

4. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 3, characterized in that, Rotation holes are provided on opposite sides of the two fixed plates (318), and the same rotating shaft (317) is connected inside the two rotation holes through bearings. A drive motor (316) is fixedly connected to one side of one of the fixed plates (318), and the drive end of the drive motor (316) is connected to one end of the rotating shaft (317) through a coupling.

5. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 4, characterized in that, A guide rope plate (315) is fixedly connected to one side of the insulating chamber (309), and a pull rope (314) is wound around the outer wall of the rotating shaft (317). The ends of the pull rope (314) pass through the insulating chamber (309) and the guide rope plate (315) respectively and are fixedly connected to the cleaning arm (302).

6. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 5, characterized in that, A driven ratchet (303) is fixedly connected to the lower side of the connecting plate (312). The driven ratchet (303) is sleeved on the outer wall of the mandrel (1). A U-shaped fixing plate (311) is fixedly connected to one side of the mounting frame (4). A drive shaft (310) is connected to the opening of the U-shaped fixing plate (311) through a bearing.

7. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 6, characterized in that, The drive shaft (310) is located inside the opening of the U-shaped fixed plate (311) and is fixedly connected to multiple drive fans (304) at equal intervals on the outer wall. The drive shaft (310) is located on the upper side of the U-shaped fixed plate (311) and is fixedly connected to a drive ratchet (305). The drive ratchet (305) meshes with the driven ratchet (303).

8. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 1, characterized in that, The adjustment component (6) includes a sliding disk (601), which is connected to the upper outer wall of the mandrel (1) via a bearing, and a sliding block (608) is slidably connected to the outer wall of the sliding disk (601).

9. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 8, characterized in that, One end of the sliding block (608) is fixedly connected to a perforated slide plate (602), and a sliding plate (603) is slidably connected inside the perforated slide plate (602). The sliding plate (603) and the perforated slide plate (602) can be fixed with bolts. A perforated rod (604) is fixedly connected to one side of the sliding plate (603), and a sliding arc-initiating rod (605) is slidably connected to the outer wall of the perforated rod (604). The sliding arc-initiating rod (605) and the perforated rod (604) can be fixed with bolts.

10. The lightning protection post-type porcelain insulator with a built-in annular discharge gap according to claim 9, characterized in that, A ratchet ring (606) is fixedly connected to the upper side of the sliding disc (601). Two sliding holes are equally spaced on the inner wall of the other end of the sliding block (608). Two limiting rods (609) are slidably connected inside the two sliding holes. One end of the two limiting rods (609) is fixedly connected to the same ratchet block (610). The ratchet block (610) is engaged with the ratchet ring (606). The outer wall of the other end of the two limiting rods (609) is respectively fitted with compression springs (607). One end of the two compression springs (607) is fixedly connected to the sliding block (608), and the other end of the two compression springs (607) is fixedly connected to the inner wall of one end of the corresponding limiting rod (609).

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