Insulator shed repair method

Abstract

The application provides a kind of insulator umbrella skirt repair method.The insulator umbrella skirt repair method includes: preparing the same repair umbrella skirt with the structure parameters of damaged umbrella skirt;The damaged part of damaged umbrella skirt is pretreated to form a repair gap;Obtain the three-dimensional data of the repair gap;According to the three-dimensional data, model construction is carried out, and the three-dimensional model of the repair block compatible with the repair gap is generated;The three-dimensional model of the repair block is imported into the control system of the cutting device, and the cutting path is generated;The repair umbrella skirt is cut according to the cutting path using the cutting device to obtain the repair block;The repair block is placed in the repair gap;Make the repair block and the damaged umbrella skirt into one body.The technical scheme of the application can solve the problem of the repair method of the prior art, and the repair efficiency is low, and the repair effect and repair quality are poor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of insulator repair, in particular to an insulator shed repair method. BACKGROUND

[0002] As a core component in high-voltage transmission lines, composite insulators have gradually replaced traditional porcelain and glass insulators since the mid-20th century, becoming the mainstream choice in power systems, thanks to their light weight, high mechanical strength, excellent pollution flashover resistance, and other advantages. Composite insulators generally consist of three parts: a high-strength glass fiber epoxy resin pull rod (core rod), a silicone rubber shed sheath, and a metal connecting piece (fittings). The silicone rubber shed is formed by integral injection or molding process, with a specific umbrella-shaped structure designed on the surface, not only providing the necessary creepage distance, but also having excellent hydrophobicity, aging resistance, and tear resistance, which is a key component to ensure the electrical and mechanical properties of the insulator. However, with the development of power systems towards ultra-high and extra-high voltage, as well as the increasing frequency of extreme weather and environmental pollution, the operation and maintenance of composite insulators face new challenges. On the one hand, during transportation, installation, and long-term operation, the insulator shed is prone to mechanical damage, such as collision during transportation, accidental friction during hoisting, bird impact, hail attack, lightning arc burn, etc., which may cause cracks, perforations, and angle defects in the insulator shed. These damages not only destroy the integrity of the insulator shed, but also significantly reduce its mechanical carrying capacity (such as tensile strength, tear strength, etc.) and electrical performance (such as surface resistance, arc resistance, etc.); on the other hand, damaged insulator sheds are more likely to form partial discharge channels in polluted environments (such as coastal salt spray, industrial dust, heavy pollution areas, etc.), accelerating the aging of silicone rubber materials, and further causing pollution flashover accidents. According to statistics, about 15%~25% of the total insulator failure rate is caused by the damage of composite insulator sheds, resulting in direct economic losses and power outage losses of up to 8 billion~12 billion yuan, seriously threatening the safe and stable operation of the power grid.

[0003] A kind of on-site repair method of broken composite insulator umbrella skirt and quick repair glue are disclosed in Chinese patent 201710898617.3, the method needs to prepare the high-temperature vulcanized composite insulator umbrella skirt quick repair glue, it is made into lump-like plasticity colloid, transported to the work site, then the composite insulator umbrella skirt quick repair glue is pressed into the approximate shape of broken missing part, and its surface contacts the surface of broken part;Using the tool pair of composite insulator umbrella skirt quick repair glue to pressurize to broken part, the composite insulator umbrella skirt quick repair glue is filled in broken part and compacted, and the surface of its contact broken part is in close contact with the surface of contact broken part;The broken part is heated at high temperature, while the quick repair glue filled in the broken part of composite insulator umbrella skirt is heated, so that the material of original broken part and quick repair glue crosslinking occur.The above method can realize the repair of broken umbrella skirt, but the curing time of repair glue is too long, which is not conducive to the quick repair of composite insulator performance and appearance, resulting in longer power outage time, and the repair glue can only be pressed into the approximate shape of broken missing part by using tools, the adaptability of repair glue and the part to be repaired is poor, and the repair effect and repair quality are poor. SUMMARY

[0004] The main purpose of the present application is to provide an insulator umbrella skirt repair method, which can solve the problems of low repair efficiency, poor repair effect and poor repair quality of the repair method of the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides an insulator umbrella skirt repair method, comprising: preparing a repair umbrella skirt with the same structural parameters as the broken umbrella skirt;Pretreat the broken part of the broken umbrella skirt to form a repaired gap;Obtain the three-dimensional data of the repaired gap;According to the three-dimensional data, a three-dimensional model of a repair block is generated;The three-dimensional model of the repair block is imported into the control system of the cutting device, and the cutting path is generated;The repair umbrella skirt is cut according to the cutting path by using the cutting device to obtain the repair block;Place the repair block in the repaired gap;Make the repair block and the broken umbrella skirt into one.

[0006] Further, the broken umbrella skirt includes at least one broken umbrella piece, and the structural parameters of the broken umbrella skirt include the material of the broken umbrella piece, the diameter of the broken umbrella piece before breaking, the thickness and the shape.

[0007] Further, the step of pretreating the broken part of the broken umbrella skirt to form a repaired gap includes: judging the broken type of the broken part of the broken umbrella skirt;According to the broken type, the corresponding processing method is adopted to form the repaired gap.

[0008] Further, the damage type includes a crack, a perforation and an angle defect, if the damage type is the crack, the area where the crack is located is cut to form a circular notch, and then the inner circumferential surface of the circular notch is planed to form the repaired notch; if the damage type is the perforation, the inner circumferential surface of the perforation is planed to form the repaired notch; if the damage type is the angle defect, the inner circumferential surface of the angle defect is planed to form the repaired notch.

[0009] Further, if the damage type is the angle defect, the step of planing the inner circumferential surface of the angle defect includes: cleaning the inner circumferential surface of the angle defect; and cutting the inner circumferential surface of the cleaned angle defect to form the repaired notch surrounded by at least three planes.

[0010] Further, the planes surrounding the repaired notch are all inclined planes, the inclined planes are inclined to the horizontal plane by a preset angle α, and the value range of α is 43°≤α≤47°.

[0011] Further, the step of placing the repair block in the repaired notch includes: performing a gluing operation on at least one of the outer circumferential surface of the repair block and the inner circumferential surface of the repaired notch.

[0012] Further, the step of connecting the repair block and the damaged canopy skirt into one includes: heating the bonding area between the repair block and the damaged canopy skirt, and pressing the repair block to keep the outer circumferential surface of the repair block and the inner circumferential surface of the repaired notch in close contact during the heating of the bonding area between the repair block and the damaged canopy skirt.

[0013] Further, the heating temperature of the bonding area between the repair block and the damaged canopy skirt ranges from 40° to 50°, and the heating time ranges from 1 min to 2 min.

[0014] By applying the technical scheme of the present application, a repair canopy skirt with the same structure parameters as the damaged canopy skirt is prepared, and during the repair, only the repair block is cut according to the specific situation of the damaged part to form the repair block, and then the repair block is directly placed in the damaged part to connect the two into one, without the need to compress the repair glue from a lump into an irregular shape and then perform a long-time high-temperature heating and curing as in the prior art. Since the repair canopy skirt itself is a solid state, the subsequent connection process is simple and fast, and the repair time can be greatly shortened. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings constituting a part of the specification of the present application are used to provide a further understanding of the present application, and the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0016] Fig. 1A flow chart of the insulator umbrella skirt repairing method of an embodiment of the present application is shown;

[0017] Fig. 2 A schematic structural diagram of a damaged umbrella skirt of an embodiment of the present application is shown;

[0018] Fig. 3 A schematic structural diagram of a repairing block of an embodiment of the present application is shown;

[0019] Fig. 4 A schematic structural diagram of a damaged umbrella skirt after repairing of an embodiment of the present application is shown.

[0020] Among them, the above-mentioned drawings include the following reference signs:

[0021] 10, damaged umbrella skirt; 11, damaged umbrella sheet; 20, repairing block; 30, to-be-repaired gap. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0023] As shown in the drawings, Figs. 1 to 4 The present application provides an insulator umbrella skirt repairing method, which comprises: preparing a repairing umbrella skirt with the same structural parameters as a damaged umbrella skirt 10; pretreating a damaged part of the damaged umbrella skirt 10 to form a to-be-repaired gap 30; obtaining three-dimensional data of the to-be-repaired gap 30; constructing a model according to the three-dimensional data and generating a three-dimensional model of a repairing block 20 adapted to the to-be-repaired gap 30; importing the three-dimensional model of the repairing block 20 into a control system of a cutting device and generating a cutting path; cutting the repairing umbrella skirt according to the cutting path by using the cutting device to obtain the repairing block 20; placing the repairing block 20 at the to-be-repaired gap 30; and connecting the repairing block 20 and the damaged umbrella skirt 10 into one body.

[0024] In the present embodiment, a repairing umbrella skirt is prepared according to the structural parameters of the damaged umbrella skirt 10, which can be prepared in advance and directly taken to the repairing site for subsequent operation. When repairing the damaged umbrella skirt 10, the damaged part of the damaged umbrella skirt 10 needs to be pretreated (for example, cleaning dirt, debris and aging layer of the damaged part, polishing and cutting the damaged part, etc.), after the pretreatment, the to-be-repaired gap 30 is formed, according to the size and shape of the pretreated to-be-repaired gap 30, the repairing umbrella skirt is cut to form a shape adapted to the to-be-repaired gap 30, then the repairing block 20 is placed at the position of the to-be-repaired gap 30, and finally the repairing block 20 and the damaged umbrella skirt 10 are connected into one body, thereby repairing the damaged part.

[0025] The step of cutting the repair umbrella skirt to form a shape matching the to-be-repaired gap 30 includes: model building according to the three-dimensional data, and generating a three-dimensional model of the repair block 20 matching the to-be-repaired gap 30; importing the three-dimensional model of the repair block 20 into the control system of the cutting device, and generating a cutting path; and cutting the repair umbrella skirt according to the cutting path by using the cutting device to obtain the repair block 20. Wherein, the three-dimensional data of the to-be-repaired gap 30 provides accurate data support for subsequent model building and repair block 20 design, ensuring that the repair block 20 can perfectly match the repair gap; model building according to the three-dimensional data and generating a three-dimensional model of the repair block 20 matching the to-be-repaired gap 30 can intuitively preview the matching of the repair block 20 and the to-be-repaired gap 30, and the control system generates a cutting path according to the three-dimensional model data, so that the subsequent cutting device can accurately cut the repair umbrella skirt, reducing material waste, ensuring that the shape of the repair block 20 matches the to-be-repaired gap 30, and further improving the repair effect and repair quality.

[0026] Meanwhile, the application repairs the damaged umbrella skirt by preparing a repair umbrella skirt with the same structure parameters as the damaged umbrella skirt, cutting the repair umbrella skirt to form a repair block 20 according to the specific circumstances of the damaged part, and then connecting the repair block 20 and the damaged part to form a whole. The prior art uses repair glue, which is plastic. When repairing, the repair glue needs to be pressed from a lump into the approximate shape of the damaged part. Since the shape of the damaged part may be irregular, this process takes a long time. The repair glue needs to be heated for a long time at high temperature to solidify. The long solidification time of the repair glue is not conducive to the rapid repair of the performance and appearance of the insulator, especially for live working insulators, which is not conducive to the safety of power supply. The application does not need to press the repair glue from a lump into an irregular shape and then heat it for a long time at high temperature to solidify, as in the prior art. Since the repair umbrella skirt is already in a solid state, the subsequent connection process is simple and fast, which can greatly shorten the repair time. Since the structure parameters of the repair umbrella skirt are the same as those of the original umbrella skirt, the repaired umbrella skirt can maintain the same performance as the original umbrella skirt, without the need for additional performance testing or adjustment, such as measuring electrical insulation performance and mechanical strength, which can further shorten the repair time and greatly improve the repair efficiency.

[0027] It should be noted that the existing composite insulator umbrella appearance unqualified products for not hanging network operation are usually returned to the manufacturer for on-machine repair, and the serious umbrella appearance unqualified products of the composite insulator already hanging network operation usually need to be powered off for replacement. The above repair methods have high cost proportion. For example, the repair method in the hanging network operation: using a special composite insulator umbrella skirt quick repair glue, pressing it into the approximate shape of the damaged part and filling and compacting, heating the repair part at high temperature to make the repair glue and the original material fuse, spraying RTV paint to clean the insulator surface dirt and powder layer, uniformly spraying RTV paint, and checking the coating surface after solidification. The repair method in the non-hanging network operation: the insulator is sent back to the factory for repair by using production molds or special repair molds to ensure the repair quality.

[0028] The insulator umbrella skirt repair method of the present application does not need to return the unqualified products to the factory, the on-site repair time is shorter, and the power-off time of the electrical system caused by the umbrella skirt damage can be reduced. The insulator umbrella skirt repair method of the present application has the following advantages:

[0029] 1) The repair work can be completed in a short time, the normal operation of the insulator is quickly restored, the power-off time is reduced, and the power supply reliability is improved;

[0030] 2) The quick online repair avoids the economic loss caused by long power-off, especially during important lines or peak load periods, and the economic benefit is particularly significant;

[0031] 3) The operation is simple and efficient, the repair process is simple to operate, and complex equipment and tools are not needed, which improves the work efficiency and reduces the labor intensity;

[0032] 4) It is suitable for various types of composite insulators, whether the umbrella skirt is damaged, the surface is dirty or other appearance problems, it can be effectively repaired;

[0033] 5) Strong environmental adaptability, the repair work can be carried out under various weather conditions, and is not limited by the environment, and has strong adaptability;

[0034] 6) High economic benefit, the quick online repair reduces the replacement frequency of the insulator, reduces the maintenance cost, avoids the indirect loss caused by power-off, and has high economic benefit;

[0035] 7) Reducing manual operation: no need to manually fix the repair mold during the heating repair and cooling forming process, reducing the process of manual operation.

[0036] In addition, the damaged shed 10 includes at least one damaged shed piece 11, and the repair shed includes at least one repair shed piece, and the structural parameters of the repair shed are the same as those of the damaged shed 10, that is, the size, shape and material of the repair shed piece are the same as those of the damaged shed piece 11.

[0037] In one embodiment of the present application, the damaged shed 10 includes at least one damaged shed piece 11, and the structural parameters of the damaged shed 10 include the material, diameter, thickness and shape of the damaged shed piece 11 before damage.

[0038] In this embodiment, the material of the damaged shed piece 11 is the same as that of the repair shed, so that the repaired shed maintains the same electrical insulation and mechanical properties as the original shed, thereby maintaining the original performance characteristics of the insulator and ensuring the safe and stable operation of the power system. The structural parameters of the damaged shed 10 also include the diameter, thickness and shape of the damaged shed piece 11 before damage, etc., ensuring that the repair shed can be accurately cut to match the damaged part, reducing errors during repair and improving repair quality and efficiency. In addition, since the material of the repair shed is completely consistent with that of the original shed in the above structural parameters, the repaired insulator can quickly recover to the original state in terms of performance, without the need for additional performance tests such as surface resistance and arc resistance, which further saves the time for post-repair inspection and verification. The immediate recovery of performance also ensures that the insulator can be immediately put into operation, reducing the power outage time caused by shed damage.

[0039] In one embodiment of the present application, the step of pre-treating the damaged part of the damaged shed 10 to form the repair gap 30 includes: judging the damage type of the damaged part of the damaged shed 10; and according to the damage type, adopting a corresponding treatment method to form the repair gap 30.

[0040] In this embodiment, by accurately judging the damage type of the damaged part, the most suitable repair method can be selected, the repair efficiency can be ensured, and the repaired shed can quickly recover to a normal state, meeting the safety and performance requirements of the power system operation.

[0041] In one embodiment of the present application, the damage type includes cracks, perforations and missing corners. If the damage type is a crack, the area where the crack is located is cut to form a circular gap, and then the inner circumferential surface of the circular gap is planed to form the repair gap 30. If the damage type is a perforation, the inner circumferential surface of the perforation is planed to form the repair gap 30. If the damage type is a missing corner, the inner circumferential surface of the missing corner is planed to form the repair gap 30.

[0042] In the embodiment, if the damage type is a crack, the area where the crack is located is cut to form a circular gap, which can effectively prevent the further expansion of the crack and avoid the reappearance of the crack during the repair process or after the repair, thereby improving the stability and durability of the repair. The inner circumferential surface of the circular gap is subjected to plane cutting, so that the inner circumferential surface of the circular gap forms a regular plane, which facilitates the connection of the repaired canopy skirt 10 with the damaged canopy skirt 10.

[0043] If the damage type is a perforation, the inner circumferential surface of the perforation is subjected to plane cutting, which can remove burrs and contaminants on the edge of the perforation and improve the cleanliness of the inner circumferential surface of the perforation. After the plane cutting, the connection between the subsequent repair block 20 and the damaged canopy skirt 10 is facilitated. Similarly, if the damage type is an angle defect, the inner circumferential surface of the angle defect is subjected to plane cutting, which can remove burrs and contaminants on the inner circumferential surface of the angle defect and improve the cleanliness of the inner circumferential surface of the angle defect. After the plane cutting, the connection between the subsequent repair block 20 and the damaged canopy skirt 10 is facilitated.

[0044] In an embodiment of the present application, if the damage type is an angle defect, the step of plane cutting the inner circumferential surface of the angle defect includes: cleaning the inner circumferential surface of the angle defect; and cutting the cleaned inner circumferential surface of the angle defect to form a to-be-repaired gap 30 surrounded by at least three planes.

[0045] In the embodiment, the cleaning of the inner circumferential surface of the angle defect can effectively remove dust, oil stains and possible aging layers on the inner circumferential surface of the angle defect. The plane cutting of the inner circumferential surface of the angle defect forms a to-be-repaired gap 30 surrounded by at least three planes, which facilitates the subsequent cutting of the repair canopy skirt into a shape suitable for the to-be-repaired gap 30, reduces the cutting difficulty and improves the repair efficiency. In addition, the connection area between the repair block 20 and the damaged canopy skirt 10 is increased, thereby ensuring the connection stability between the two.

[0046] In an embodiment of the present application, the planes surrounding the to-be-repaired gap 30 are all inclined planes, which are inclined at a preset angle a relative to the horizontal plane, and the value of a is in the range of 43°≤a≤47°.

[0047] In the embodiment, the inclined plane design increases the surface area of the contact between the repair block 20 and the to-be-repaired gap 30, thereby ensuring the connection stability between the two.

[0048] In an embodiment, a 3D scanner, a laser scanner or the like can be used to obtain three-dimensional data of the repair gap. Software such as SolidWorks and UG can be used for model construction based on the three-dimensional data. A numerical control cutting machine, a laser cutting machine or the like of the prior art can be used as the cutting device.

[0049] In one embodiment of the present application, the step of placing the repair block 20 before the step of repairing the gap 30 includes: performing a glue coating operation on at least one of the outer circumferential surface of the repair block 20 and the inner circumferential surface of the gap 30 to be repaired.

[0050] In the present embodiment, the glue coating operation is performed on at least one of the outer circumferential surface of the repair block 20 and the inner circumferential surface of the gap 30 to be repaired to connect the repair umbrella skirt with the damaged umbrella skirt 10.

[0051] In one embodiment of the present application, the step of connecting the repair block 20 with the damaged umbrella skirt 10 includes: heating the bonding area between the repair block 20 and the damaged umbrella skirt 10, and pressing the repair block 20 to keep the outer circumferential surface of the repair block 20 in close contact with the inner circumferential surface of the gap 30 to be repaired during the heating of the bonding area between the repair block 20 and the damaged umbrella skirt 10.

[0052] In the present embodiment, heating the bonding area between the repair block 20 and the damaged umbrella skirt 10 can accelerate the glue curing process and improve the repair efficiency. The combination of heating and pressing operations can significantly shorten the time of the entire repair process, quickly achieve bonding and curing compared to the traditional method which requires a long time for natural curing, reduce the time of the insulator being out of operation due to repair, and improve the reliability of the power grid operation.

[0053] In one embodiment of the present application, the heating temperature of the bonding area between the repair block 20 and the damaged umbrella skirt 10 is in the range of 40° to 50°, and the heating time is in the range of 1 minute to 2 minutes.

[0054] Through the above settings, the glue reaches a sufficient curing degree in a short time, thereby ensuring the bonding strength between the repair block 20 and the damaged umbrella skirt 10, and avoiding the performance degradation or deformation of the material caused by excessively high temperature, and ensuring that the performance of the repaired part is consistent with that of the original material.

[0055] In one embodiment of the present application, a rechargeable intelligent temperature control clamp is used to heat the bonding area between the repair block 20 and the damaged umbrella skirt 10. The repair block 20 can be quickly and stably fixed at the damaged part, thereby improving the repair efficiency. Since the relative position between the clamp and the insulator is stable, the repair quality of the damaged umbrella skirt 10 can be better guaranteed.

[0056] It should be noted that the rechargeable intelligent temperature control clamp can adopt existing technologies, and the specific structure is not described here.

[0057] In one embodiment of the present application, the outer circumferential surface of the repair block 20 is bonded with the inner circumferential surface of the gap 30 to be repaired by using weather-resistant glue. When applying the glue, it is necessary to ensure that the glue layer is complete and free of bubbles to ensure the bonding effect. After the weather-resistant glue is cured, the bonding part needs to be checked to ensure the interface bonding strength and sealing performance, thereby ensuring that the repaired insulator restores the original performance.

[0058] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: by preparing a repair umbrella skirt that is completely the same as the structure parameters of the damaged umbrella skirt, during repair, only the damaged part needs to be cut to form a repair block, and then the repair block is directly placed in the damaged part to connect the two into one, without the need to press the repair glue from a lump into an irregular shape and then perform long-time high-temperature curing as in the prior art. Since the repair umbrella skirt itself is a solid state, the subsequent connection process is simple and fast, and the repair time can be greatly shortened.

[0059] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application.

[0060] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be further understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0061] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for repairing insulator skirts, characterized in that, include: Prepare a repaired umbrella skirt with the same structural parameters as the damaged umbrella skirt (10); The damaged part of the damaged umbrella skirt (10) is pre-treated to form a gap (30) to be repaired. Obtain the three-dimensional data of the notch (30) to be repaired; A model is constructed based on the three-dimensional data, and a three-dimensional model of the repair block (20) that is adapted to the gap (30) to be repaired is generated; The three-dimensional model of the repair block (20) is imported into the control system of the cutting device, and a cutting path is generated; The repair umbrella skirt is cut according to the cutting path using the cutting device to obtain the repair block (20). Place the repair block (20) on the gap to be repaired (30); The repair block (20) is connected to the damaged umbrella skirt (10) as a whole; The damaged umbrella skirt (10) includes at least one damaged umbrella piece (11), and the structural parameters of the damaged umbrella skirt (10) include the material of the damaged umbrella piece (11), the diameter, thickness and shape of the damaged umbrella piece (11) before it is damaged; The step of pre-processing the damaged part of the damaged umbrella skirt (10) to form a gap (30) to be repaired includes: determining the damage type of the damaged part of the damaged umbrella skirt (10); According to the type of damage, the corresponding treatment method is adopted to form the gap to be repaired (30). The damage types include cracks, perforations, and missing corners. If the damage type is a crack, the area where the crack is located is cut off to form a circular notch, and then the inner circumferential surface of the circular notch is shaped to form the notch to be repaired (30). If the damage type is a perforation, the inner circumferential surface of the perforation is shaped to form the notch to be repaired (30). If the damage type is a missing corner, the inner circumferential surface of the missing corner is shaped to form the notch to be repaired (30).

2. The insulator skirt repair method according to claim 1, characterized in that, If the damage type is a missing corner, the step of planing the inner circumferential surface of the missing corner includes: Clean the inner circumferential surface of the missing corner; The inner circumferential surface of the cleaned corner is cut to form the notch to be repaired (30) surrounded by at least three planes.

3. The insulator skirt repair method according to claim 2, characterized in that, All planes that form the gap (30) to be repaired are inclined planes, and the inclined planes are inclined at a preset angle α relative to the horizontal plane. The value of α is 43°≤α≤47°.

4. The insulator skirt repair method according to claim 1, characterized in that, The step of placing the repair block (20) on the notch to be repaired (30) includes applying adhesive to at least one of the outer peripheral surface of the repair block (20) and the inner peripheral surface of the notch to be repaired (30).

5. The insulator skirt repair method according to claim 4, characterized in that, The steps of connecting the repair block (20) and the damaged umbrella skirt (10) together include: The bonding area between the repair block (20) and the damaged umbrella skirt (10) is heated, and during the heating process, the repair block (20) is squeezed so that the outer peripheral surface of the repair block (20) is in contact with the inner peripheral surface of the gap to be repaired (30).

6. The insulator skirt repair method according to claim 5, characterized in that, The heating temperature range for heating the bonding area between the repair block (20) and the damaged umbrella skirt (10) is 40°~50°, and the heating time ranges from 1min to 2min.

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