A composite insulator for overhead lines

Abstract

The present invention discloses a composite insulator for overhead lines, belonging to the field of composite insulators, comprising a main shed, a secondary shed fixedly connected to the outer surface of a lower end of the main shed, a scraper assembly arranged on the outer side of the main shed, the scraper assembly comprising a traction part and a movable part, the traction part comprising an insulating sleeve fixedly connected to the outer surface of the main shed, a support plate fixedly connected to the outer surface of the insulating sleeve, and a guide seat fixedly connected to one end of the support away from the insulating sleeve. By arranging components such as a wind cup, a partition, and an elastic rope, the dirt attached to the wind cup surface can be shaken off to a certain extent through the change of the shape of the wind cup surface, thereby effectively reducing the residual dirt on the wind cup surface and reducing the influence of the dirt on the wind cup weight, thereby ensuring the flexibility of the wind cup movement to a certain extent, and further improving the cleaning effect of the main shed surface.

Description

Technical Field

[0001] The present invention relates to the field of composite insulators, and more particularly to a composite insulator for overhead lines. Background Art

[0002] Composite insulators are high-performance insulating components composed of glass fiber epoxy resin core rods and silicone rubber sheds. They are used for supporting and isolating current in overhead transmission lines in power systems. Composite insulators have become an indispensable component in power systems due to their excellent mechanical properties, pollution flashover resistance, and ease of installation and maintenance.

[0003] Since insulators are exposed to the outdoor environment for a long time, various contaminants are easily accumulated on their surface. When these contaminants are deposited on the surface of the insulator, the insulation performance of the insulator will be reduced, and the risk of leakage and flashover will be increased. The electrolyte in the contamination layer will dissolve under humid conditions to form a conductive path, thus causing the flashover failure of the insulator. This will not only cause equipment damage, but may also cause serious accidents such as large-scale power outages;

[0004] In order to improve the safety of the insulator, it is necessary to clean the dirt on the surface of the insulator in time. For example, the Chinese patent with the announcement number CN110993222B discloses a self-cleaning composite insulator, in which a cleaning device is driven by a driving device to move downward to contact the top of the shed skirt, and then the surface of the insulator is wiped and cleaned by a cleaning cloth to reduce the adhesion of dirt on the surface of the insulator;

[0005] In the prior art, the insulator uses a wind cup to drive a cleaning cloth to clean the surface of the insulator. However, after the cleaning cloth has been working for a period of time, dirt will gradually adhere to the surface of the cleaning cloth. When the insulator is cleaned again, the dirt attached to the surface of the cleaning cloth will re-attach to the surface of the insulator, thereby causing secondary pollution to the surface of the insulator. Therefore, the cleaning cloth needs to be cleaned and replaced frequently, which not only shortens the working life of the insulator, but also increases the labor intensity of power maintenance personnel to a certain extent, resulting in certain inconveniences in actual application. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a composite insulator for overhead lines, which can achieve the purpose of shaking off the dirt attached to the surface of the wind cup to a certain extent by arranging components such as wind cups, partitions, elastic ropes, etc. through the change of the shape of the surface of the wind cup, thereby effectively reducing the residual dirt on the surface of the wind cup and reducing the influence of the dirt on the weight of the wind cup, thereby ensuring the flexibility of the movement of the wind cup to a certain extent, and further improving the cleaning effect of the surface of the main shed.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A composite insulator for an overhead line, comprising a main shed, a secondary shed fixedly connected to an outer surface of a lower end of the main shed, and a scraper assembly arranged on the outer side of the main shed;

[0009] The scraper assembly comprises a traction part and a movable part, the traction part comprises an insulating sleeve fixedly connected to an outer surface of the main shed, a support plate is fixedly connected to the outer surface of the insulating sleeve, an end of the support plate away from the insulating sleeve is fixedly connected to a guide seat, and a movable sleeve is slidably connected to the outer surface of the guide seat;

[0010] The movable part includes an elastic rope fixedly connected to the outer surface of the movable sleeve, the elastic rope is fixedly connected to a ring at one end away from the movable sleeve, the inner surface of the ring is movably connected to a wind cup, the outer surface of the wind cup is fixedly connected to a scraper, and the scraper and the cup mouth of the wind cup are in sliding contact with the outer surface of an upper end of the main umbrella skirt.

[0011] Furthermore, the guide seat is distributed in a circular ring shape, a cavity is embedded in the inner side of the guide seat, the movable sleeves are in several groups and distributed in a ring array, the outer surface of the movable sleeves is arc-shaped, the outer surface of the wind cup is inclined, and the wind cup, scraper blade, and elastic rope are all made of lightweight insulating material.

[0012] Furthermore, a partition is fixedly connected to the inner surface of the wind cup, a through groove is opened on the outer surface of the partition, the scraper is in a circular ring shape, the number of the wind cups is several groups and distributed in a ring array, and the partition is made of elastic material.

[0013] Furthermore, a storage groove is provided on the outer surface of a lower end of the auxiliary umbrella skirt, and a connecting plate is fixedly connected to the outer surface of a lower end of the auxiliary umbrella skirt outside the storage groove. The number of the connecting plates is several groups and they are symmetrically distributed, and the outer surface of the connecting plate is detachably connected to a pin shaft.

[0014] Furthermore, a connecting ring is sleeved on the outer surface of the pin shaft, a mounting block is fixedly connected to the lower side of the outer surface of the connecting ring, a main umbrella skirt 2 is fixedly connected to the outer surface of the lower end of the mounting block, the number of the main umbrella skirts 2 is several groups and is linearly distributed, and a secondary umbrella skirt 2 is fixedly connected to the outer surface of the lower end of the main umbrella skirt 2 at the lowest side.

[0015] Furthermore, a steel column is fixedly connected to the outer surface of an upper end of the main umbrella skirt, a thread is provided on the outer surface of the steel column, a locking nut is threadedly connected to the outer surface of the steel column, and the steel column is connected to the transmission tower via the locking nut.

[0016] Furthermore, the locking nuts are in two groups and are distributed in parallel, the outer surface of the steel column is slidably connected with a clamping plate, the clamping plates are in two groups and are located between the two groups of locking nuts, and the clamping plates are in active contact with the outer surfaces of the locking nuts respectively.

[0017] Furthermore, an isolation sleeve is fixedly connected to the outer surface of the lower end of the second auxiliary umbrella skirt, and an insulating rod is fixedly connected to the outer surface of the lower end of the isolation sleeve 23. A slot is provided on the outer surface of the insulating rod, and the slot extends to the lower side of the insulating rod. An extrusion block is slidably connected to the inner surface of the slot, and the outer surface of the upper end of the extrusion block is arc-shaped, and a movable seat is fixedly connected to the outer surface of the lower end of the extrusion block.

[0018] Furthermore, the movable seat is in a T-shaped structure, and a spiral groove is provided at the lower end of the insulating rod. The spiral grooves are in two groups and are symmetrically distributed. The insulating rod is threadedly connected to a bolt through the spiral groove, and the bolt passes through the upper and lower ends of the movable seat. The extrusion block cooperates with the slot to clamp and fix the transmission wire.

[0019] Furthermore, the outer surfaces of the lower ends of the main umbrella skirt 1 and the main umbrella skirt 2 are provided with water stop grooves, which are distributed in a circular ring shape, and the outer surfaces of the main umbrella skirt 1, the main umbrella skirt 2, the auxiliary umbrella skirt 1, and the auxiliary umbrella skirt 2 are sprayed with anti-fouling flashover coating.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) This solution provides components such as wind cups, partitions, and elastic ropes, and can shake off dirt attached to the wind cup surface to a certain extent through changes in the shape of the wind cup surface, thereby effectively reducing the residual dirt on the wind cup surface and reducing the impact of the dirt on the wind cup weight, thereby ensuring the flexibility of the wind cup movement to a certain extent, and further improving the cleaning effect of the main shed surface;

[0022] (2) This solution is provided with components such as a movable sleeve and a scraper, and the cup mouth of the wind cup and the scraper are in rotational contact with the outer surface of the main shed, so that the dirt attached to the outer surface of the main shed can be effectively scraped and cleaned, thereby effectively reducing the residual dirt on the outer surface of the main shed, which can not only reduce the water flow resistance of the outer surface of the main shed and improve the hydrophobic performance, but also effectively reduce the risk of leakage and flashover of the insulator;

[0023] (3) In this solution, the wind cup stretches the elastic rope under the action of centrifugal force. At this time, the wind cup slides toward the edge of the main shed. The wind cup and the scraper evenly scrape and clean the outer surface of the main shed when moving, thereby effectively expanding the cleaning area and further improving the cleaning effect of the dirt on the outer surface of the main shed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 3 It is a top view of the overall structure of the present invention;

[0027] Figure 4 For the present invention Figure 3 Middle AA section view;

[0028] Figure 5 For the present invention Figure 1 Middle BB section view;

[0029] Figure 6 For the present invention Figure 4 The enlarged schematic diagram at C in the middle;

[0030] Figure 7 For the present invention Figure 4 The enlarged schematic diagram at D in the middle;

[0031] Figure 8 For the present invention Figure 5 The enlarged schematic diagram at E in the middle;

[0032] Fig. 9 For the present invention Figure 4 Enlarged schematic diagram at F in the middle.

[0033] Description of the numbers in the figure:

[0034] 11. Clamping plate; 12. Steel column; 13. Locking nut; 14. Main umbrella skirt one; 15. Insulating sleeve; 16. Secondary umbrella skirt one; 17. Storage groove; 18. Pin shaft; 19. Connecting plate; 20. Connecting ring; 21. Mounting block; 22. Main umbrella skirt two; 23. Isolation sleeve; 24. Insulating rod; 25. Slot; 26. Spiral groove; 27. Extrusion block; 28. Movable seat; 29. ​​Bolt; 30. Support plate; 31. Guide seat; 32. Movable sleeve; 33. Cavity; 34. Elastic rope; 35. Wind cup; 36. Ring; 37. Partition; 38. Through groove; 39. Scraper; 40. Water stop groove; 41. Secondary umbrella skirt two. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 9A composite insulator for an overhead line comprises a main shed 14, a secondary shed 16 is fixedly connected to the outer surface of the lower end of the main shed 14, and a scraper assembly is arranged on the outer side of the main shed 14;

[0037] The scraper assembly includes a traction part and a movable part, the traction part includes an insulating sleeve 15 fixedly connected to the outer surface of the main shed 14, the outer surface of the insulating sleeve 15 is fixedly connected to a support plate 30, the end of the support plate 30 away from the insulating sleeve 15 is fixedly connected to a guide seat 31, and the outer surface of the guide seat 31 is slidably connected to a movable sleeve 32;

[0038] The movable part includes an elastic rope 34 fixedly connected to the outer surface of the movable sleeve 32, the elastic rope 34 is fixedly connected to a ring 36 at one end away from the movable sleeve 32, the inner surface of the ring 36 is movably connected to a wind cup 35, the outer surface of the wind cup 35 is fixedly connected to a scraper 39, the scraper 39 and the cup mouth of the wind cup 35 are in sliding contact with the outer surface of the upper end of the main umbrella skirt 14.

[0039] The guide seat 31 is distributed in a circular ring shape, and a cavity 33 is embedded inside the guide seat 31. The movable sleeves 32 are in several groups and distributed in a ring array. The outer surface of the movable sleeve 32 is arc-shaped, and the outer surface of the wind cup 35 is inclined. The wind cup 35, the scraper 39, and the elastic rope 34 are all made of lightweight insulating materials.

[0040] By adopting the above technical solution, the transmission tower suspends and supports the transmission wire through the insulator, and the insulator can play a good insulation effect between the wire and the transmission tower. After working for a period of time, dirt will adhere to the surface of the insulator, and the dirt will reduce the insulation performance of the insulator, thereby increasing the risk of leakage and flashover. Therefore, it is necessary to regularly clean the dirt on the surface of the insulator. For this purpose, a scraper assembly is provided. The insulating sleeve 15 on the outer side of the main umbrella skirt 14 can further improve the insulation performance of the insulator. The insulating sleeve 15 supports the guide seat 31 through the support plate 30. The cavity 33 opened on the inner side of the guide seat 31 can reduce the deadweight of the guide seat 31 to a certain extent, thereby reducing the impact on the bearing capacity of the insulator. The annular guide seat 31 can guide and support the movable sleeve 32, so that the movable sleeve 32 slides along the outer surface of the guide seat 31. The movable sleeve 32 pulls and supports the ring 36 through the elastic rope 34, so that the wind cup 35 is movably supported by the ring 36. When the insulator is blown by the wind in the sky, the wind will blow the wind cup 35, and the wind cup 35 will move along the main umbrella skirt under the traction and support of the ring 36 and the elastic rope 34. The outer surface of the main shed 14 slides, and the wind cup 35 drives the scraper 39 to move synchronously. The cup mouth of the wind cup 35 and the scraper 39 are in rotational contact with the outer surface of the main shed 14, so that the dirt attached to the outer surface of the main shed 14 can be effectively scraped and cleaned, thereby effectively reducing the residual dirt on the outer surface of the main shed 14, which can not only reduce the water flow resistance on the outer surface of the main shed 14 and improve the hydrophobic performance, but also effectively reduce the risk of leakage and flashover of the insulator. When the wind speed changes, the moving speed of the wind cup 35 and the movable sleeve 32 will be accelerated synchronously. At this time The wind cup 35 will stretch the elastic rope 34 under the action of centrifugal force. At this time, the wind cup 35 will slide toward the edge of the main shed 14. The wind cup 35 and the scraper 39 will evenly scrape and clean the outer surface of the main shed 14 when moving, thereby effectively expanding the cleaning area, and further improving the cleaning effect of the dirt on the outer surface of the main shed 14. At the same time, the wind cup 35 will have a certain bird-repelling effect during the rotation process, thereby reducing the probability of birds staying near the insulator, and further reducing the probability of bird droppings dripping from the outer surface of the main shed 14.

[0041] like Figure 1 , Figure 5 , Figure 6 and Figure 8 As shown, a partition 37 is fixedly connected to the inner surface of the wind cup 35, a through groove 38 is opened on the outer surface of the partition 37, the scraper 39 is in a circular ring shape, the number of the wind cups 35 is several groups and distributed in a ring array, and the partition 37 is made of elastic material.

[0042] By adopting the above technical solution, the partition 37 inside the wind cup 35 divides and supports the internal space of the wind cup 35, thereby improving the overall structural strength of the wind cup 35. The partition 37 is made of elastic material, and the through groove 38 on its surface can reduce the dead weight of the partition 37. When blown by strong wind, the partition 37 will produce a certain degree of elastic deformation. When the partition 37 undergoes elastic deformation, it will drive the cup body of the wind cup 35 to deform. The shape change of the surface of the wind cup 35 can shake off the dirt attached to the surface of the wind cup 35 to a certain extent, thereby effectively reducing the residual dirt on the surface of the wind cup 35 and reducing the influence of dirt on the weight of the wind cup 35, thereby ensuring the flexibility of the movement of the wind cup 35 to a certain extent, and further improving the cleaning effect of the surface of the main umbrella skirt 14, effectively extending the working time of the insulator.

[0043] like Figure 1 , Figure 4 and Fig. 9 As shown, a storage groove 17 is provided on the outer surface of the lower end of the auxiliary umbrella skirt 16, and a connecting plate 19 is fixedly connected to the outer surface of the lower end of the auxiliary umbrella skirt 16 outside the storage groove 17. The number of the connecting plates 19 is several groups and they are symmetrically distributed, and the outer surface of the connecting plate 19 is detachably connected to a pin shaft 18.

[0044] The outer surface of the pin shaft 18 is sleeved with a connecting ring 20, and the lower side of the outer surface of the connecting ring 20 is fixedly connected to a mounting block 21, and the outer surface of the lower end of the mounting block 21 is fixedly connected to a main umbrella skirt 22. The number of the main umbrella skirts 22 is several groups and is linearly distributed, and the lower end outer surface of the main umbrella skirt 22 at the lowest side is fixedly connected to an auxiliary umbrella skirt 41.

[0045] By adopting the above technical solution, according to the position of the transmission tower and the conductor, it is necessary to select an insulator of appropriate length to pull and support the conductor. At this time, the overall length of the insulator is adjusted by using an appropriate number of main umbrella skirts 22 and auxiliary umbrella skirts 16 to meet the support needs of conductors at different positions. When the main umbrella skirt 22 is hung to the lower end of the auxiliary umbrella skirt 16, the pin shaft 18 is first taken out from the outer surface of the connecting plate 19, and then the pin shaft 18 is passed through the middle of the connecting ring 20, and the pin shaft 18 is passed through the surface of the connecting plate 19 again, and the main umbrella skirt 22 is hung to the lower end of the auxiliary umbrella skirt 16. The plate 19 movably supports the pin shaft 18, and the connecting ring 20 fixedly supports the main shed 22 through the mounting block 21. The main shed 22 can be snapped to the lower end of the auxiliary shed 16 through the connecting ring 20 and the pin shaft 18. The storage groove 17 on the lower side of the main shed 22 can reserve sufficient space for installing the connecting ring 20. The operator can adjust the length of the insulator by snapping and connecting different numbers of auxiliary sheds 16, thereby meeting the needs of conductor traction support at different positions, thereby effectively improving the application range of the composite insulator.

[0046] like Figure 1 and Figure 4 As shown, the outer surface of the upper end of the main umbrella skirt 14 is fixedly connected with a steel column 12, the outer surface of the steel column 12 is provided with a thread, the outer surface of the steel column 12 is threadedly connected with a locking nut 13, and the steel column 12 is connected to the transmission tower through the locking nut 13.

[0047] The locking nuts 13 are in two groups and are distributed in parallel. The outer surface of the steel column 12 is slidably connected with a clamping plate 11. The clamping plates 11 are in two groups and are located between the two groups of locking nuts 13. The clamping plates 11 are in active contact with the outer surfaces of the locking nuts 13 respectively.

[0048] By adopting the above technical solution, when installing the composite insulator, first remove the locking nut 13 and the clamping plate 11 on the upper side, then pass the steel column 12 through the mounting hole on the surface of the transmission tower, and then install the locking nut 13 and the clamping plate 11 on the surface of the steel column 12 again, and then the operator screws the two sets of locking nuts 13, and the clamping plate 11 is driven to move synchronously by the locking nuts 13, so that the two sets of clamping plates 11 are tightly attached to the surface of the transmission tower to lock and fix the steel column 12, so that the composite insulator can be stably clamped on the transmission tower, thereby improving the convenience of insulator installation to a certain extent.

[0049] like Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, an isolation sleeve 23 is fixedly connected to the outer surface of the lower end of the auxiliary umbrella skirt 21, and an insulating rod 24 is fixedly connected to the outer surface of the lower end of the isolation sleeve 23. A slot 25 is provided on the outer surface of the insulating rod 24, and the slot 25 penetrates to the lower side of the insulating rod 24. An extrusion block 27 is slidably connected to the inner surface of the slot 25. The outer surface of the upper end of the extrusion block 27 is arc-shaped, and a movable seat 28 is fixedly connected to the outer surface of the lower end of the extrusion block 27.

[0050] The movable seat 28 is in a T-shaped structure. A spiral groove 26 is provided at the lower end of the insulating rod 24. The spiral grooves 26 are in two groups and are symmetrically distributed. The insulating rod 24 is threadedly connected with a bolt 29 through the spiral groove 26. The bolt 29 passes through the upper and lower ends of the movable seat 28. The extrusion block 27 cooperates with the card slot 25 to clamp and fix the transmission wire.

[0051] By adopting the above technical solution, the auxiliary umbrella skirt 24 is fixedly supported by the isolation sleeve 23 on the insulating rod 24. When the conductor is pulled and supported, the insulator is first fixedly installed on the transmission tower, and then the operator removes the bolt 29 and the movable seat 28, and then places the transmission conductor in the slot 25 on the lower side of the insulating rod 24. Then the operator screws the bolt 29 to the lower end of the insulating rod 24 through the spiral groove 26. As the bolt 29 is gradually screwed, the bolt 29 moves upward along the spiral groove 26. The movable seat 28 has a T-shaped structure that can drive the extrusion block 27 to move upward synchronously along the inside of the slot 25. The extrusion block 27 squeezes the conductor into the slot 25, thereby completing the clamping and fixing of the conductor. By moving the extrusion block 27 to different positions, conductors of different diameters can be clamped, thereby further improving the application range of the insulator and meeting the clamping needs of conductors of different diameters.

[0052] like Figure 2 and Figure 4 As shown, the outer surfaces of the lower ends of the main umbrella skirt 14 and the main umbrella skirt 22 are provided with water stop grooves 40, and the water stop grooves 40 are distributed in a circular ring shape. The outer surfaces of the main umbrella skirt 14, the main umbrella skirt 22, the auxiliary umbrella skirt 16, and the auxiliary umbrella skirt 2 41 are sprayed with anti-fouling flashover coating.

[0053] By adopting the above technical scheme, the water stop groove 40 on the lower surface of the main umbrella skirt 14 and the main umbrella skirt 22 can block and isolate rainwater, thereby reducing the probability of rainwater flowing linearly on the outer surface of the main umbrella skirt 14 and the main umbrella skirt 22, thereby reducing the probability of flashover between the transmission tower and the conductor due to rainwater, thereby improving the safety of the insulator to a certain extent. The anti-pollution flashover coating sprayed on the outer surface of the main umbrella skirt 14, the main umbrella skirt 22, the auxiliary umbrella skirt 16, and the auxiliary umbrella skirt 2 41 can improve the hydrophobic performance to a certain extent and shorten the residence time of rainwater, thereby effectively reducing the risk of short-circuit failure of the insulator. At the same time, the anti-pollution flashover coating can reduce dirt adhesion, reduce the probability of pollution flashover of the insulator, and further improve the safety protection effect of the composite insulator.

[0054] Instructions for use: When using the composite insulator, first pass the steel column 12 through the mounting hole on the surface of the transmission tower, and the locking nut 13 is tightly fitted on the surface of the transmission tower through the clamping plate 11 to lock and fix the steel column 12, so that the composite insulator can be stably clamped on the transmission tower, and then the main umbrella skirt 22 is clamped to the lower end of the auxiliary umbrella skirt 16 through the connecting ring 20 and the pin shaft 18. By clamping and connecting different numbers of auxiliary umbrella skirts 16, the length of the insulator can be adjusted to meet the needs of conductor traction support at different positions, and then the transmission wire is placed in the slot 25 on the lower side of the insulating rod 24. By moving the extrusion block 27 to different positions, wires of different diameters can be clamped. The wind in the air will blow the wind cup 35, and the wind cup 35 will slide along the outer surface of the main umbrella skirt 14 under the traction and support of the ring 36 and the elastic rope 34. The cup mouth of the wind cup 35 and the scraper 39 will rotate in contact with the outer surface of the main umbrella skirt 14, so that the dirt attached to the outer surface of the main umbrella skirt 14 can be effectively scraped and cleaned. The wind cup 35 will stretch the elastic rope 34 under the action of centrifugal force. At this time, the wind cup 35 will slide to the edge of the main umbrella skirt 14. The wind cup 35 and the scraper 39 will evenly scrape and clean the outer surface of the main umbrella skirt 14 when moving, thereby effectively expanding the cleaning area, and further improving the cleaning effect of the dirt on the outer surface of the main umbrella skirt 14.

[0055] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A composite insulator for an overhead line, comprising a main shed (14), characterized in that: The lower end outer surface of the main umbrella skirt (14) is fixedly connected to the auxiliary umbrella skirt (16), and the outer side of the main umbrella skirt (14) is provided with a scraper assembly; The scraper assembly comprises a traction part and a movable part, the traction part comprises an insulating sleeve (15) fixedly connected to the outer surface of the main shed (14), the outer surface of the insulating sleeve (15) is fixedly connected to a support plate (30), one end of the support plate (30) away from the insulating sleeve (15) is fixedly connected to a guide seat (31), and the outer surface of the guide seat (31) is slidably connected to a movable sleeve (32); The movable part comprises an elastic rope (34) fixedly connected to the outer surface of the movable sleeve (32); one end of the elastic rope (34) away from the movable sleeve (32) is fixedly connected to a collar (36); the inner surface of the collar (36) is movably connected to a wind cup (35); the outer surface of the wind cup (35) is fixedly connected to a scraper (39); the scraper (39) and the cup opening of the wind cup (35) are in sliding contact with the outer surface of the upper end of the main shed (14).

2. A composite insulator for overhead lines according to claim 1, characterized in that: The guide seat (31) is distributed in a circular ring shape, a cavity (33) is embedded in the inner side of the guide seat (31), the movable sleeves (32) are provided in a plurality of groups and are distributed in a circular array, the outer surface of the movable sleeves (32) is in an arc shape, the outer surface of the wind cup (35) is in an inclined shape, and the wind cup (35), the scraper (39), and the elastic rope (34) are all made of lightweight insulating material.

3. A composite insulator for overhead lines according to claim 2, characterized in that: The inner surface of the wind cup (35) is fixedly connected with a partition (37), the outer surface of the partition (37) is provided with a through groove (38), the scraper (39) is in a circular ring shape, the number of the wind cups (35) is a plurality of groups and distributed in a ring array, and the partition (37) is made of elastic material.

4. A composite insulator for overhead lines according to claim 3, characterized in that: The outer surface of the lower end of the auxiliary umbrella skirt (16) is provided with a storage groove (17); the outer surface of the lower end of the auxiliary umbrella skirt (16) is located outside the storage groove (17) and is fixedly connected with a connecting plate (19); the connecting plates (19) are provided in a plurality of groups and are symmetrically distributed; the outer surface of the connecting plate (19) is detachably connected with a pin shaft (18).

5. A composite insulator for overhead lines according to claim 4, characterized in that: The outer surface of the pin shaft (18) is sleeved with a connecting ring (20), the lower side of the outer surface of the connecting ring (20) is fixedly connected to a mounting block (21), the lower end outer surface of the mounting block (21) is fixedly connected to a main umbrella skirt (22), the number of the main umbrella skirts (22) is a plurality of groups and they are linearly distributed, and the lower end outer surface of the main umbrella skirt (22) at the lowermost side is fixedly connected to a secondary umbrella skirt (41).

6. A composite insulator for overhead lines according to claim 5, characterized in that: The upper outer surface of the main umbrella skirt (14) is fixedly connected to a steel column (12), the outer surface of the steel column (12) is provided with a thread, the outer surface of the steel column (12) is threadedly connected to a locking nut (13), and the steel column (12) is connected to the transmission tower via the locking nut (13).

7. A composite insulator for overhead lines according to claim 6, characterized in that: The locking nuts (13) are provided in two groups and are distributed in parallel. The outer surface of the steel column (12) is slidably connected with a clamping plate (11). The clamping plates (11) are provided in two groups and are located between the two groups of locking nuts (13). The clamping plates (11) are in active contact with the outer surfaces of the locking nuts (13).

8. A composite insulator for overhead lines according to claim 7, characterized in that: The lower end outer surface of the secondary umbrella skirt (41) is fixedly connected to an isolation sleeve (23), the lower end outer surface of the isolation sleeve (23) is fixedly connected to an insulating rod (24), the outer surface of the insulating rod (24) is provided with a clamping groove (25), the clamping groove (25) penetrates to the lower side of the insulating rod (24), the inner surface of the clamping groove (25) is slidably connected to an extrusion block (27), the upper end outer surface of the extrusion block (27) is in an arc shape, and the lower end outer surface of the extrusion block (27) is fixedly connected to a movable seat (28).

9. A composite insulator for overhead lines according to claim 8, characterized in that: The movable seat (28) is in a T-shaped structure. The lower end of the insulating rod (24) is provided with a spiral groove (26). The number of the spiral grooves (26) is two groups and they are symmetrically distributed. The insulating rod (24) is threadedly connected with a bolt (29) through the spiral groove (26). The bolt (29) passes through the upper and lower ends of the movable seat (28). The extrusion block (27) cooperates with the clamping groove (25) to clamp and fix the power transmission wire.

10. A composite insulator for overhead lines according to claim 9, characterized in that: The lower end outer surfaces of the main shed 1 (14) and the main shed 2 (22) are provided with water stop grooves (40), and the water stop grooves (40) are distributed in a circular ring shape. The outer surfaces of the main shed 1 (14), the main shed 2 (22), the auxiliary shed 1 (16), and the auxiliary shed 2 (41) are sprayed with anti-fouling flashover coatings.

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