Auxiliary umbrella cover and installation method of auxiliary umbrella cover

Abstract

The invention discloses an auxiliary umbrella cover which is used for covering an insulator in operation, the insulator comprises an insulator, a sheath and a spiral umbrella skirt, the sheath and the spiral umbrella skirt are arranged outside the insulator, and the spiral umbrella skirt is in a continuous spiral shape on the periphery of the sheath along the axial direction of the insulator. The spiral umbrella skirt comprises a plurality of single-circle spiral umbrella skirts which are sequentially connected in the axial direction of the insulator, the auxiliary umbrella cover is a spiral single-piece umbrella cover, the auxiliary umbrella cover is adhered to the upper surface of the spiral umbrella skirt through an adhesive, and the auxiliary umbrella cover at least continuously covers the upper surface of one single-circle spiral umbrella skirt. The auxiliary umbrella cover is tightly bonded on the spiral umbrella skirt, so that the problem of aging of the insulator is effectively solved, the maintenance cost of the insulator is reduced, the auxiliary umbrella cover is long in service life and not easy to pollute and damage, and the ice flashover resistance, rain flashover resistance and pollution flashover resistance of the insulator are improved. The invention further discloses an installation method of the auxiliary umbrella cover.

Description

Technical Field

[0001] The present application relates to the field of electric power transmission equipment, and particularly relates to an auxiliary umbrella sleeve and an installation method thereof. Background Art

[0002] At present, insulators have been widely used in the electric power industry. Commonly used insulator umbrella types include large and small umbrellas, equal-diameter umbrellas, and helical umbrellas. After the composite insulator has been in operation for a certain number of years, the umbrella skirts will have aging phenomena such as powdering and cracking, resulting in a reduction in the external insulation performance of the insulator and failing to meet the insulation requirements of the equipment. At the same time, due to problems such as heavy rain and icing, accidents such as rain flashovers and ice flashovers of insulators tend to occur frequently.

[0003] To solve the above problems, generally, the method of spraying RTV on the surface of the insulator or installing an auxiliary umbrella sleeve is used to improve the insulation performance of the insulator. Among them, the method of spraying RTV not only has a high cost but also has a limited lifespan and cannot fundamentally ensure the long-term operation of the insulator; while the existing single-piece auxiliary umbrella sleeve and full-coverage auxiliary umbrella sleeve cannot be installed on the helical umbrella structure and cannot meet the performance requirements of such insulators for rain flashover and ice flashover resistance. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the main purpose of the present application is to provide an auxiliary umbrella sleeve, which is a helical umbrella sleeve, can be tightly adhered to the helical umbrella skirt, improve the problem of insulator aging, and reduce the maintenance cost of the insulator.

[0005] To solve the above technical problems, the technical solution adopted by the present application is: an auxiliary umbrella sleeve for covering an operating insulator. The insulator includes an insulator body, a sheath provided outside the insulator body, and a helical umbrella skirt. The helical umbrella skirt is continuously helical along the axial direction of the insulator on the outer periphery of the sheath. The helical umbrella skirt includes a plurality of sequentially connected single-turn helical umbrella skirts in the axial direction of the insulator. The auxiliary umbrella sleeve is a helical single-piece umbrella sleeve, and the auxiliary umbrella sleeve is adhered to the upper surface of the helical umbrella skirt through an adhesive. The auxiliary umbrella sleeve continuously covers at least the upper surface of one single-turn helical umbrella skirt.

[0006] Among them, the outer diameter of the auxiliary umbrella sleeve is greater than the outer diameter of the helical umbrella skirt.

[0007] Among them, the length of the single-turn helical umbrella skirt is D, and the length of the auxiliary umbrella sleeve is D to 1.5D.

[0008] Among them, the auxiliary umbrella sleeve is provided with a resistance tape, the resistance tape is arranged on the inner wall of the auxiliary umbrella sleeve, and the length of the resistance tape is 5 mm to 30 mm.

[0009] Among them, the auxiliary umbrella sleeve is provided with an anti-overflow edge, the anti-overflow edge is located at the first end and the second end of the auxiliary umbrella sleeve, and the length of the anti-overflow edge is 5 mm to 30 mm.

[0010] Among them, the gap between the auxiliary umbrella sleeve and the spiral umbrella skirt is 0.5 mm to 1 mm.

[0011] Among them, the thickness of the auxiliary umbrella sleeve gradually decreases from the root to the outer edge.

[0012] Among them, the spiral umbrella skirt includes a wide-width umbrella skirt and a narrow-width umbrella skirt, and the auxiliary umbrella sleeve is arranged on the wide-width umbrella skirt.

[0013] Among them, a plurality of auxiliary umbrella sleeves are arranged on the insulator at intervals along its axis.

[0014] Among them, the joints of adjacent auxiliary umbrella sleeves are arranged staggeredly.

[0015] To achieve the above object, the present application also provides an installation method for the auxiliary umbrella sleeve, including the following steps:

[0016] ① Bond the auxiliary umbrella sleeve to the spiral umbrella skirt using an adhesive;

[0017] ② Fill the gap where the auxiliary umbrella sleeve is connected to the spiral umbrella skirt with the adhesive;

[0018] ③ After the adhesive is cured, spray an anti-fouling and flashover coating on the outer side of the insulator.

[0019] The beneficial effects of the present application are as follows: The auxiliary umbrella sleeve of the present application is tightly bonded to the spiral umbrella skirt. For insulators in long-term operation, the spiral umbrella skirt has long-term aging problems. The auxiliary umbrella sleeve can repair the aging spiral umbrella skirt, effectively solve the problem of insulator aging, reduce the maintenance cost of the insulator, and the auxiliary umbrella sleeve has a long service life, is not easily contaminated and damaged, and improves the anti-icing flashover, anti-rain flashover, and anti-fouling flashover capabilities of the insulator.

[0020] At the same time, the auxiliary umbrella sleeve not only increases the creepage distance of the insulator, but also has the function of blocking rain and snow, protecting the insulator from rain and snow scouring, and can improve the wet withstand voltage of the insulator, further improving the insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0022] Figure 1 is the front view of the insulator 200 with the auxiliary umbrella sleeve 100 installed in an embodiment of the present application;

[0023] Figure 2 is the three-dimensional structure schematic diagram of the auxiliary umbrella sleeve 100 in an embodiment of the present application;

[0024] Figure 3 is the front view of the auxiliary umbrella sleeve 100 for installing the insulator 200 in another embodiment of the present application;

[0025] Figure 4 is the front view of the auxiliary umbrella sleeve 100 for installing the insulator 200 in yet another embodiment of the present application;

[0026] Figure 5 is in the present application Figure 4 top view. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the 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 efforts shall fall within the protection scope of the present application.

[0028] Refer to Figures 1 to 2 , an auxiliary umbrella sleeve 100 is used to cover and install on the operating insulator 200. The insulator 200 includes an insulator 220, a sheath 230 disposed outside the insulator 220, and a spiral umbrella skirt 210. The spiral umbrella skirt 210 is continuously spiral along the axial direction of the insulator 200 on the outer periphery of the sheath 230. The auxiliary umbrella sleeve 100 is a spiral single-piece umbrella sleeve, that is, the auxiliary umbrella sleeve 100 is continuously spiral, and the auxiliary umbrella sleeve 100 includes an upper surface 104 and a lower surface 105 disposed opposite to each other. The lower surface 105 of the auxiliary umbrella sleeve 100 is covered and adhered to the upper surface of the spiral umbrella skirt 210 through an adhesive. The auxiliary umbrella sleeve 100 is tightly adhered to the spiral umbrella skirt 210. For the insulator 200 operating for a long time, its spiral umbrella skirt 210 has long-term aging problems. The setting of the auxiliary umbrella sleeve 100 can repair the aging spiral umbrella skirt 210, effectively solve the problem of aging of the insulator 200, reduce the maintenance cost of the insulator 200, and the auxiliary umbrella sleeve 100 has a long service life, is not easily polluted and damaged, and improves the anti-icing flash, anti-rain flash, and anti-pollution flash capabilities of the insulator 200.

[0029] Since the auxiliary umbrella sleeve 100 is formed by continuously spiraling, and the auxiliary umbrella sleeve 100 needs to be wound around the outer periphery of the sheath 230 of the insulator 200, a cavity is formed by the inner side surface of the auxiliary umbrella sleeve 100 spiraling. And this cavity is a cylindrical cavity to be installed on the outer periphery of the sheath 230. The inner wall of this cavity is the inner wall 101 of the auxiliary umbrella sleeve 100. Define the connection part between the spiral umbrella skirt 210 and the outer periphery of the sheath 230 as the root of the spiral umbrella skirt 210. When the auxiliary umbrella sleeve 100 is bonded to the spiral umbrella skirt 210, the inner wall 101 of the auxiliary umbrella sleeve 100 is flush with the root of the spiral umbrella skirt 210. At this time, the auxiliary umbrella sleeve 100 can completely cover the entire upper surface of the spiral umbrella skirt 100. In another embodiment, the inner wall 101 of the auxiliary umbrella sleeve 100 is not flush with the root of the spiral umbrella skirt 210, that is, the auxiliary umbrella sleeve 100 does not completely cover the spiral umbrella skirt. The adhesive gradually transitions from the inner wall 101 of the auxiliary umbrella sleeve 100 to the upper surface of the spiral umbrella skirt 210, or the adhesive gradually transitions from the inner wall 101 of the auxiliary umbrella sleeve 100 to the sheath 230, forming a smooth transition area to prevent dirt such as rainwater from accumulating at the inner wall 101 of the auxiliary umbrella sleeve 100.

[0030] The spiral umbrella skirt 210 is a continuous structure arranged on the outer periphery of the sheath 230. In the axial direction of the insulator 200, the spiral umbrella skirt 210 spirally winds from one end of the insulator 200 to the other end of the insulator 200. Define the outermost side of the spiral umbrella skirt 210 away from the sheath 230 as the outer edge of the spiral umbrella skirt 210, and define the outermost side of the auxiliary umbrella sleeve 100 away from the inner wall 101 as the outer edge of the auxiliary umbrella sleeve 100. Since both the auxiliary umbrella sleeve 100 and the spiral umbrella skirt 210 are spiral structures, define the distance between two points arranged relatively along the radial direction of the spiral umbrella skirt 210 on the outer edge of the spiral umbrella skirt 210 as the outer diameter of the spiral umbrella skirt 210, and define the distance between two points arranged relatively along the radial direction of the auxiliary umbrella sleeve 100 on the outer edge of the auxiliary umbrella sleeve 100 as the outer diameter of the auxiliary umbrella sleeve 100. Among them, the outer diameter of the auxiliary umbrella sleeve 100 is greater than the outer diameter of the spiral umbrella skirt 210, and the auxiliary umbrella sleeve 100 extends outward along the outer edge of the spiral umbrella skirt 210, which overall increases the creepage distance of the insulator 200 and further improves the anti-ice flash, anti-rain flash and anti-pollution flash capabilities of the insulator 200. The auxiliary umbrella sleeve 100 also has the function of blocking rain and snow, can protect the insulator 200, reduce the scouring of rain and snow, improve the wet withstand voltage of the insulator 200, and further improve the insulation effect.

[0031] In this embodiment, the thickness of the auxiliary umbrella sleeve 100 gradually decreases from the root to the outer edge. That is, the thickness of the root of the auxiliary umbrella sleeve 100 is the largest, ensuring the mechanical strength of its root and better bonding with the sheath 230 at the same time; the thickness of the outer edge of the auxiliary umbrella sleeve 100 is the smallest, making the overall shape of the auxiliary umbrella sleeve 100 umbrella-shaped, better covering the outer surface of the spiral umbrella skirt 210, helping to reduce the overall weight of the auxiliary umbrella sleeve 100, reducing material costs, and improving the heat dissipation efficiency, which is beneficial to extending the service life of the insulator 200. In other embodiments, the thickness of the auxiliary umbrella sleeve may also remain unchanged from the root to the outer edge, as long as the auxiliary umbrella sleeve can be firmly bonded to the spiral umbrella skirt, which is not limited here.

[0032] Continue to refer to Figure 2 , the auxiliary umbrella sleeve 100 includes a first end 102 and a second end 103. The auxiliary umbrella sleeve 100 is spirally wound from the first end 102 to the second end 103. The distance from the first end 102 to the second end 103 along the inner wall 101 of the auxiliary umbrella sleeve 100 is defined as the length of the auxiliary umbrella sleeve 100, and the distance from one end of the insulator 200 to the other end of the insulator 200 along the root of the spiral umbrella skirt 210 is defined as the length of the spiral umbrella skirt 210. At the same time, the spiral umbrella skirt 210 that continuously surrounds the outer circumference 360° of the insulator 200 is defined as a single-turn spiral umbrella skirt, and the length of the single-turn spiral umbrella skirt is D. The spiral umbrella skirt 210 includes several sequentially connected single-turn spiral umbrella skirts in the axial direction of the insulator 200, and the auxiliary umbrella sleeve 100 at least continuously covers the upper surface of one single-turn spiral umbrella skirt.

[0033] In one embodiment, the length of the auxiliary umbrella sleeve 100 is D to 1.5D. That is, when the auxiliary umbrella sleeve 100 covers the spiral umbrella skirt 210, the auxiliary umbrella sleeve 100 can cover the length of the spiral umbrella skirt 210 for one to one and a half weeks. At this time, the auxiliary umbrella sleeve 100 can be firmly and reliably bonded to the spiral umbrella skirt 210. This is because when the length of the auxiliary umbrella sleeve 100 is less than D, there is a gap in the circumferential direction of the spiral umbrella skirt 210, that is, the auxiliary umbrella sleeve 100 does not completely cover the spiral umbrella skirt 210, forming a liquid flow channel on the spiral umbrella skirt 210, and then the ability to improve the anti-ice flash, anti-rain flash and anti-pollution flash of the insulator 200 cannot be realized; when the length of the auxiliary umbrella sleeve 100 is greater than 1.5D, although the auxiliary umbrella sleeve 100 can improve the anti-ice flash, anti-rain flash and anti-pollution flash capabilities of the insulator 200, the material consumption increases, resulting in higher costs.

[0034] At the same time, in this embodiment, it is not necessary to remove the aging spiral umbrella skirt 210. The auxiliary umbrella sleeve 100 can be directly bonded to the aging spiral umbrella skirt 210, which can effectively solve the problem of aging of the insulator 200 and reduce the maintenance cost of the insulator 200 at the same time.

[0035] Combined with Figure 3, in another embodiment, the auxiliary umbrella sleeve 100 further includes a blocking tape 121 and an anti-overflow edge 122. The blocking tape 121 is disposed on the inner wall 101 of the auxiliary umbrella sleeve 100 and extends from the inner wall 101 of the auxiliary umbrella sleeve 100 along the axial direction of the insulator 200 away from the upper surface 104 of the auxiliary umbrella sleeve 100 on the upper surface 104 of the auxiliary umbrella sleeve 100, and the blocking tape 121 forms a continuous circumferential inner cavity on the upper surface of the auxiliary umbrella sleeve 100, so that the blocking tape 121 can be tightly sleeved on the outer periphery of the sheath 230. When the auxiliary umbrella sleeve 100 is installed on the insulator 200, the blocking tape 121 is in contact with the sheath 230. The length of the blocking tape 121 along the axial direction of the insulator 200 is defined as the length of the blocking tape 121. In this embodiment, the length of the blocking tape 121 is 5 mm to 30 mm. The blocking tape 121 is integrally formed with the auxiliary umbrella sleeve 100, and the inner surface of the blocking tape 121 is a non-adhesive area, that is, the inner surface of the blocking tape 121 is not coated with an adhesive. The non-adhesive area can prevent the adhesive from squeezing out of the auxiliary umbrella sleeve 100 and remaining on the non-bonding surface of the sheath 230, and the blocking tape 121 can limit the adhesive to the lower surface 105 of the auxiliary umbrella sleeve 100. Moreover, the presence of the blocking tape 121 can make the fixing between the auxiliary umbrella sleeve 100 and the insulator 200 more firm and less vulnerable to external contamination. There are two anti-overflow edges 122, which are respectively located at the first end 101 and the second end 102 of the auxiliary umbrella sleeve 100. The two anti-overflow edges 122 respectively extend along the circumferential direction of the auxiliary umbrella sleeve 100 from the first end 101 and the second end 102 of the auxiliary umbrella sleeve 100. The length of the anti-overflow edge 122 along the circumferential direction of the auxiliary umbrella sleeve 100 is defined as the length of the anti-overflow edge 122. In this embodiment, the length of the anti-overflow edge 122 is 5 mm to 30 mm. The anti-overflow edge 122 is integrally formed with the auxiliary umbrella sleeve 100, and the lower surface of the anti-overflow edge 122 is a non-adhesive area, that is, the lower surface of the anti-overflow edge 122 is not coated with an adhesive. The non-adhesive area can prevent the adhesive from squeezing out of the auxiliary umbrella sleeve 100 and remaining on the non-bonding surface of the spiral umbrella skirt 210, and the anti-overflow edge 122 can limit the adhesive to the lower surface 105 of the auxiliary umbrella sleeve 100. Moreover, the presence of the anti-overflow edge 122 can make the fixing between the auxiliary umbrella sleeve 100 and the insulator 200 more firm and less vulnerable to external contamination.

[0036] In this embodiment, the adhesive is RTV coating. The lower surface 105 of the auxiliary umbrella sleeve 100 and the upper surface of the spiral umbrella skirt 210 are both coated with the adhesive. When the auxiliary umbrella sleeve 100 is adhered to the spiral umbrella skirt 210, there is a gap between the lower surface 105 of the auxiliary umbrella sleeve 100 and the upper surface of the spiral umbrella skirt 210, and the gap is filled with the adhesive, so that the auxiliary umbrella sleeve 100 and the spiral umbrella skirt 210 are fully adhered. Among them, the gap between the auxiliary umbrella sleeve 100 and the spiral umbrella skirt 210 is 0.5 mm to 1 mm. This bonding method is firm, and has the advantages of long service life, low cost and easy manufacturing. When the auxiliary umbrella sleeve 100 covers the spiral umbrella skirt 210, the gap where the auxiliary umbrella sleeve 100 is connected to the spiral umbrella skirt 210 is filled with the adhesive, that is, the inner wall 101 of the auxiliary umbrella sleeve 100 is filled with the adhesive. While the auxiliary umbrella sleeve 100 is tightly adhered to the spiral umbrella skirt 210, the auxiliary umbrella sleeve 100 smoothly transitions to the sheath 230, preventing dirt, rain or snow from entering through the gaps between the auxiliary umbrella sleeve 100, the spiral umbrella skirt 210 and the sheath 230, and avoiding affecting the insulation performance of the insulator 200, the fixing firmness of the auxiliary umbrella sleeve 100 and the service life of the auxiliary umbrella sleeve 100. Further, after the auxiliary umbrella sleeve 100 covers the spiral umbrella skirt 210, an anti-fouling flashover coating is sprayed on the outer side of the insulator 200. The anti-fouling flashover coating is RTV coating, so that the outer sides of the auxiliary umbrella sleeve 100, the spiral umbrella skirt 210 and the sheath 230 all have RTV coatings, so that the insulator 200 has excellent hydrophobicity and water repellent migration properties, and at the same time is resistant to ultraviolet rays, ozone, and environmental erosion, improving the surface characteristics of the insulator, and can effectively protect the insulator 200 from damage. In other embodiments, the adhesive can also be other coatings, as long as it can tightly connect the auxiliary umbrella sleeve and the spiral umbrella skirt, and no limitation is made here.

[0037] Combined Figures 4 to 5 , one or more auxiliary umbrella sleeves 100 can be provided on an insulator 200, and joints 110 are formed at the connection parts of the first end 102 and the second end 103 of the auxiliary umbrella sleeve 100 and the spiral umbrella skirt 210. When multiple auxiliary umbrella sleeves 100 are provided on the insulator 200, the multiple auxiliary umbrella sleeves 100 are spaced apart axially on the insulator 200, and the joints 110 of adjacent auxiliary umbrella sleeves 100 are staggered, so that the joints 110 of adjacent auxiliary umbrella sleeves 100 are not on the same vertical line, preventing liquid impurities such as rainwater from dripping down and forming a straight line at the joints 110 of the auxiliary umbrella sleeves 100, thereby forming a continuous straight line on the insulator 200, and then forming a continuous conductive channel on the outer surface of the insulator 200, causing the insulator 200 to have a flashover phenomenon.

[0038] In one embodiment, the length of the single - loop spiral umbrella skirt is D, and the length of the auxiliary umbrella sleeve 100 is 1.5D. That is, the auxiliary umbrella sleeve 100 can cover one and a half circumferences of the spiral umbrella skirt 210. At this time, the seam 110 at the first end 102 and the second end 103 of the auxiliary umbrella sleeve 100 is located on the same radial line. The seams 110 of adjacent auxiliary umbrella sleeves 100 are staggered by 150°. That is, the first end 102 of one auxiliary umbrella sleeve 100 and the first end 102 of an adjacent auxiliary umbrella sleeve 100 are staggered by 150° with the axis of the insulator 220 as the center of the circle, or the second end 103 of one auxiliary umbrella sleeve 100 and the second end 103 of an adjacent auxiliary umbrella sleeve 100 are staggered by 150° with the axis of the insulator 220 as the center of the circle. Further, the seams 110 of adjacent auxiliary umbrella sleeves 100 are arranged in a staggered manner, so that the seams 110 of the auxiliary umbrella sleeves 100 are not on the same vertical line, ensuring that when liquid impurities such as rainwater drip downward, they cannot form a straight line at the seams 110 of the auxiliary umbrella sleeves 100, reducing the flashover phenomenon of the insulator 200.

[0039] In another embodiment, the spiral umbrella skirt 210 includes umbrella skirts that are spaced apart and have different outer diameters. The spiral umbrella skirt 210 with a larger outer diameter is defined as a wide - width umbrella skirt, and the spiral umbrella skirt 210 with a smaller outer diameter is defined as a narrow - width umbrella skirt (not shown in the figure), that is, the outer diameter of the wide - width umbrella skirt is greater than the outer diameter of the narrow - width umbrella skirt. The spiral umbrella skirt 210 is composed of wide - width umbrella skirts and narrow - width umbrella skirts arranged in sequence between every two adjacent wide - width umbrella skirts. The auxiliary umbrella sleeve 100 is arranged on the wide - width umbrella skirt. The length of the wide - width umbrella skirt between two adjacent narrow - width umbrella skirts is defined as L. At this time, the length of the auxiliary umbrella sleeve 100 is also L, that is, the auxiliary umbrella sleeve 100 can completely cover the wide - width umbrella skirt between two adjacent narrow - width umbrella skirts. The outer diameter of the auxiliary umbrella sleeve 100 is greater than the outer diameter of the wide - width umbrella skirt, and the outer diameter of the wide - width umbrella skirt is greater than the outer diameter of the narrow - width umbrella skirt, so that the coating area of the adhesive is larger, the bonding is firm and the rigidity is good, enabling the insulator 200 to have excellent anti - deformation performance and excellent pollution - wet flashover performance, and greatly reducing the consumption of the umbrella skirt material of the insulator 200.

[0040] The present application also provides an installation method for the auxiliary umbrella sleeve 100, including the following steps:

[0041] ① Bond the auxiliary umbrella sleeve 100 to the spiral umbrella skirt 210 using an adhesive.

[0042] Specifically, first, pour an appropriate amount of alcohol onto a cotton cloth and wipe the spiral umbrella skirt 210 and the sheath 230 with the cotton cloth to wipe off the accumulated dust. Then, squeeze the adhesive onto the upper surface of the spiral umbrella skirt 210 and the bonding part of the sheath 230. At the same time, squeeze the adhesive onto the lower surface of the auxiliary umbrella sleeve 100 and spread the adhesive evenly with a squeegee. Then, align the root of the auxiliary umbrella sleeve 100 with the root of the spiral umbrella skirt 210 and fully squeeze to expel the air in the bonding part, so that the two fit together completely. Finally, use a clip to fix the bonding part of the auxiliary umbrella sleeve 100 with the spiral umbrella skirt 210 and the sheath 230 to prevent the auxiliary umbrella sleeve 100 from shifting relative to the spiral umbrella skirt 210 before the adhesive cures. The two jaws of the clip have a certain gap, and the clamping force of the clip can ensure that the gap between the auxiliary umbrella sleeve 100 and the spiral umbrella skirt 210 is 0.5 mm to 1 mm.

[0043] In this step, if the auxiliary umbrella sleeve 100 is provided with a stop tape 121 and an anti-overflow edge 122, note that the stop tape 121 and the anti-overflow edge 122 are not coated with the adhesive, which can confine the adhesive to the lower surface 105 of the auxiliary umbrella sleeve 100 and prevent the adhesive from overflowing the auxiliary umbrella sleeve 100 after extrusion and remaining on the non-bonding surfaces of the spiral umbrella skirt 210 and the sheath 230.

[0044] ② Fill the gap where the auxiliary umbrella sleeve 100 is connected to the spiral umbrella skirt 210 with the adhesive.

[0045] Specifically, fill the gap where the auxiliary umbrella sleeve 100 is connected to the spiral umbrella skirt 210 with the adhesive for patching, and at the same time, pay attention that the adhesive does not fall on other non-bonding areas of the spiral umbrella skirt 210 and the auxiliary umbrella sleeve 100, and let it stand for curing for more than 8 hours. That is, apply the adhesive all over the edge root of the auxiliary umbrella sleeve 100 to tightly bond the auxiliary umbrella sleeve 100 to the spiral umbrella skirt 210 and the sheath 230, preventing dirt, rain or snow from entering through the gap between the auxiliary umbrella sleeve 100 and the spiral umbrella skirt 210 and the sheath 230, and avoiding affecting the insulation performance of the insulator 200, as well as the fixing firmness and the service life of the auxiliary umbrella sleeve 100.

[0046] ③ After the adhesive cures, spray an anti-fouling flashover coating on the outer side of the insulator 200.

[0047] Specifically, remove the clip after the adhesive cures and spray an anti-fouling flashover coating on the outer side of the insulator 200, so that the outer sides of the auxiliary umbrella sleeve 100, the spiral umbrella skirt 210 and the sheath 230 all have an anti-fouling flashover coating, and the anti-fouling flashover coating entirely covers the auxiliary umbrella sleeve 100 and the insulator 200, making the outer surface of the insulator 200 continuous and smooth. Thus, the insulator 200 has excellent hydrophobicity and water repellent migration properties, and at the same time is resistant to ultraviolet rays, ozone, and environmental erosion, improving the surface characteristics of the insulator and effectively protecting the insulator 200 from damage.

[0048] The beneficial effects of the present application are as follows: The auxiliary umbrella sleeve of the present application is tightly adhered to the spiral umbrella skirt. For insulators operating for a long time, the spiral umbrella skirt has long-term aging problems. The auxiliary umbrella sleeve can repair the aging spiral umbrella skirt, effectively solve the problem of insulator aging, reduce the maintenance cost of the insulator, and the auxiliary umbrella sleeve has a long service life, is not easily contaminated and damaged, and improves the anti-ice flash, anti-rain flash and anti-pollution flash capabilities of the insulator.

[0049] At the same time, the auxiliary umbrella sleeve not only increases the creepage distance of the insulator, but also has the function of shielding rain and snow, protecting the insulator from rain and snow scouring, and can improve the wet withstand voltage of the insulator, further improving the insulation effect.

[0050] The above is only the implementation mode of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. An auxiliary umbrella cover, used to cover an insulator in operation, characterized in that: The insulator comprises an insulator, a sheath arranged outside the insulator, and a spiral shed skirt, wherein the spiral shed skirt is in a continuous spiral shape at the outer periphery of the sheath along the axial direction of the insulator, and the spiral shed skirt comprises a plurality of single-turn spiral shed skirts connected in sequence in the axial direction of the insulator, and the auxiliary shed cover is a spiral single-piece shed cover, and the auxiliary shed cover is bonded to the upper surface of the spiral shed skirt by an adhesive, and the auxiliary shed cover continuously covers at least one upper surface of the single-turn spiral shed skirt.

2. The auxiliary umbrella cover according to claim 1, characterized in that: The outer diameter of the auxiliary umbrella cover is greater than the outer diameter of the spiral umbrella skirt.

3. The auxiliary umbrella cover according to claim 1, characterized in that: The length of the single-turn spiral umbrella skirt is D, and the length of the auxiliary umbrella cover is D to 1.5D.

4. The auxiliary umbrella cover according to claim 1, characterized in that: The auxiliary umbrella cover is provided with a resistive tape, and the resistive tape is arranged on the inner wall of the auxiliary umbrella cover, and the length of the resistive tape is 5mm to 30mm.

5. The auxiliary umbrella cover according to claim 1, characterized in that: The auxiliary umbrella cover is provided with an anti-overflow edge, and the anti-overflow edge is located at the first end and the second end of the auxiliary umbrella cover, and the length of the anti-overflow edge is 5mm to 30mm.

6. The auxiliary umbrella cover according to claim 1, characterized in that: The gap between the auxiliary umbrella cover and the spiral umbrella skirt is 0.5mm-1mm.

7. The auxiliary umbrella cover according to claim 1, characterized in that: The thickness of the auxiliary umbrella cover gradually decreases from the root to the outer edge.

8. The auxiliary umbrella cover according to claim 1, characterized in that: The spiral shed comprises a wide shed and a narrow shed, and the auxiliary shed is arranged on the wide shed.

9. The auxiliary umbrella cover according to claim 1, characterized in that: A plurality of auxiliary umbrella sleeves are arranged on the insulator at intervals along the axial direction thereof.

10. The auxiliary umbrella cover according to claim 9, characterized in that: The seams of adjacent auxiliary umbrella covers are staggered.

11. A method for installing an auxiliary umbrella cover, characterized in that: The auxiliary umbrella cover according to any one of claims 1 to 10 above is used, comprising the following steps: ① Using adhesive to bond the auxiliary umbrella cover to the spiral umbrella skirt; ② Fill the gap between the auxiliary umbrella cover and the spiral umbrella skirt with the adhesive; ③ After the adhesive is cured, anti-pollution flashover paint is sprayed on the outside of the insulator.

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