Auxiliary umbrella cover

Abstract

The utility model 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.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power transmission equipment, in particular to an auxiliary umbrella. BACKGROUND

[0002] At present, insulators have been widely used in the power industry, and common insulator umbrella types include large and small umbrellas, equal-diameter umbrellas, and spiral umbrellas. After a certain period of operation, the umbrella skirt of the composite insulator will produce aging phenomena such as powdering and cracking, which will reduce the external insulation performance of the insulator and cannot meet the insulation requirements of the equipment. At the same time, due to heavy rain and icing problems, the rain flash and ice flash accidents of the insulator also tend to occur frequently.

[0003] In order to solve the above problems, the surface of the insulator is generally sprayed with RTV or an auxiliary umbrella is installed to improve the insulation performance of the insulator. Among them, the spraying of RTV not only has high cost, but also has limited service life and cannot fundamentally guarantee the long-term operation of the insulator; and the existing single-piece auxiliary umbrella and full-coated auxiliary umbrella cannot be installed on the spiral umbrella structure, and cannot meet the performance requirements of rain flash and ice flash resistance of the insulator. CONTENT OF THE INVENTION

[0004] In view of the deficiencies of the prior art, the main purpose of the present application is to provide an auxiliary umbrella, which is a spiral umbrella, can be tightly bonded to the spiral umbrella skirt, improves the aging problem of the insulator, and reduces the maintenance cost of the insulator.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is: an auxiliary umbrella for covering an insulator in operation, the insulator comprising an insulator body, a sheath arranged outside the insulator body, and a spiral umbrella skirt, the spiral umbrella skirt being continuous in a spiral shape along the axial direction of the insulator at the outer periphery of the sheath, the spiral umbrella skirt comprising a plurality of single-turn spiral umbrella skirts connected in sequence in the axial direction of the insulator, the auxiliary umbrella being a spiral single-piece umbrella, the auxiliary umbrella being bonded to the upper surface of the spiral umbrella skirt by an adhesive, and the auxiliary umbrella continuously covering at least the upper surface of one single-turn spiral umbrella skirt.

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

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

[0008] Among them, the auxiliary umbrella is provided with a glue-resistant tape, the glue-resistant tape being arranged on the inner wall of the auxiliary umbrella, and the length of the glue-resistant tape being 5mm~30mm.

[0009] Among them, the auxiliary umbrella is provided with a spill-proof edge, the spill-proof edge being located at the first end and the second end of the auxiliary umbrella, and the length of the spill-proof edge being 5mm~30mm.

[0010] The gap between the auxiliary umbrella cover and the spiral umbrella skirt is 0.5mm-1mm.

[0011] The thickness of the auxiliary umbrella cover gradually decreases from the root to the outer edge.

[0012] The spiral umbrella skirt includes a wide umbrella skirt and a narrow umbrella skirt, and the auxiliary umbrella cover is arranged on the wide umbrella skirt.

[0013] The auxiliary umbrella cover is arranged on the insulator in a plurality of intervals along the axial direction.

[0014] The seams of adjacent auxiliary umbrella covers are staggered.

[0015] The auxiliary umbrella cover of the application is closely bonded to the spiral umbrella skirt. For the insulator running for a long time, the spiral umbrella skirt has a long-term aging problem. The auxiliary umbrella cover 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 cover has a long service life and is not easy to be polluted and damaged, thereby improving the anti-ice flashover, anti-rain flashover and anti-pollution flashover capability of the insulator.

[0016] At the same time, the auxiliary umbrella cover not only increases the creepage distance of the insulator, but also has the effect of shielding rain and snow, protecting the insulator from rain and snow erosion, improving the wet withstand voltage of the insulator, and further improving the insulation effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0018] Figure 1 is a front view of the insulator 200 installing the auxiliary umbrella cover 100 in an embodiment of the application;

[0019] Figure 2 is a perspective structural schematic view of the auxiliary umbrella cover 100 in an embodiment of the application;

[0020] Figure 3 is a front view of the insulator 200 installing the auxiliary umbrella cover 100 in another embodiment of the application;

[0021] Figure 4 is a front view of the insulator 200 installing the auxiliary umbrella cover 100 in another embodiment of the application;

[0022] Figure 5 is a top view of the auxiliary umbrella cover 100 in the application. Figure 4 DETAILED DESCRIPTION​

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only 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 skilled in the art without creative efforts fall within the scope of the present application.

[0024] Referring to Figures 1-2 An auxiliary umbrella 100 is used to cover an insulator 200 installed in operation, the insulator 200 includes an insulator 220 and a sheath 230 arranged outside the insulator 220, and a spiral shed 210 which is continuous spiral along the axial direction of the insulator 200 at the outer periphery of the sheath 230. The auxiliary umbrella 100 is a spiral single-piece umbrella, that is, the auxiliary umbrella 100 is continuous spiral, and the auxiliary umbrella 100 includes oppositely arranged upper surface 104 and lower surface 105, and the lower surface 105 of the auxiliary umbrella 100 is adhered to the upper surface of the spiral shed 210 by an adhesive. The auxiliary umbrella 100 is tightly adhered to the spiral shed 210, and for the insulator 200 in long-term operation, the spiral shed 210 has a long-term aging problem, and the setting of the auxiliary umbrella 100 can repair the aging spiral shed 210, effectively solve the problem of aging of the insulator 200, reduce the maintenance cost of the insulator 200, and the auxiliary umbrella 100 has long service life and is not easy to be polluted and damaged, thereby improving the anti-ice flash, anti-rain flash and anti-pollution flashover capability of the insulator 200.

[0025] Since the auxiliary umbrella 100 is continuous spiral, and the auxiliary umbrella 100 needs to be wound around the outer periphery of the sheath 230 of the insulator 200, the inner side of the auxiliary umbrella 100 spirals to form a cavity, and the cavity is a cylindrical cavity for installation at the outer periphery of the sheath 230, and the inner wall of the cavity is the inner wall 101 of the auxiliary umbrella 100. The connection between the spiral shed 210 and the outer periphery of the sheath 230 is defined as the root of the spiral shed 210, and when the auxiliary umbrella 100 is adhered to the spiral shed 210, the inner wall 101 of the auxiliary umbrella 100 is flush with the root of the spiral shed 210, at this time the auxiliary umbrella 100 can completely cover the entire upper surface of the spiral shed 100. In another embodiment, the inner wall 101 of the auxiliary umbrella 100 is not flush with the root of the spiral shed 210, that is, the auxiliary umbrella 100 does not completely cover the spiral shed. The adhesive gradually transitions from the inner wall 101 of the auxiliary umbrella 100 to the upper surface of the spiral shed 210, or the adhesive gradually transitions from the inner wall 101 of the auxiliary umbrella 100 to the sheath 230, forming a smooth transition zone to avoid the accumulation of rainwater and other contaminants at the inner wall 101 of the auxiliary umbrella 100.

[0026] The spiral umbrella skirt 210 is a continuous structure arranged outside the sheath 230, and 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. The outermost side of the spiral umbrella skirt 210 away from the sheath 230 is defined as the outer edge of the spiral umbrella skirt 210, and the outermost side of the auxiliary umbrella cover 100 away from the inner wall 101 is defined as the outer edge of the auxiliary umbrella cover 100. Since the auxiliary umbrella cover 100 and the spiral umbrella skirt 210 are both spiral structures, the distance between two points on the outer edge of the spiral umbrella skirt 210 and radially opposite to each other along the spiral umbrella skirt 210 is defined as the outer diameter of the spiral umbrella skirt 210, and the distance between two points on the outer edge of the auxiliary umbrella cover 100 and radially opposite to each other along the auxiliary umbrella cover 100 is defined as the outer diameter of the auxiliary umbrella cover 100. The outer diameter of the auxiliary umbrella cover 100 is greater than the outer diameter of the spiral umbrella skirt 210, and the auxiliary umbrella cover 100 extends outward along the outer edge of the spiral umbrella skirt 210, thereby increasing the creepage distance of the insulator 200 as a whole and further improving the anti-ice flashover, anti-rain flashover and anti-pollution flashover capabilities of the insulator 200. The auxiliary umbrella cover 100 also has the function of shielding rain and snow, which can protect the insulator 200, reduce rain and snow erosion, improve the wet withstand voltage of the insulator 200, and further improve the insulation effect.

[0027] In the present embodiment, the thickness of the auxiliary umbrella cover 100 gradually decreases from the root to the outer edge. That is, the thickness of the root of the auxiliary umbrella cover 100 is the largest, which ensures the mechanical strength of the root and better adhesion with the sheath 230; the thickness of the outer edge of the auxiliary umbrella cover 100 is the smallest, so that the auxiliary umbrella cover 100 as a whole has a shape of an umbrella, better covers the outer surface of the spiral umbrella skirt 210, and at the same time helps to reduce the overall weight of the auxiliary umbrella cover 100, reduces the material cost, and can improve the heat dissipation efficiency, which is conducive to prolonging the service life of the insulator 200. In other embodiments, the thickness of the auxiliary umbrella cover can remain unchanged from the root to the outer edge, as long as the auxiliary umbrella cover can be firmly adhered to the spiral umbrella skirt, which is not limited herein.

[0028] Continuing to refer to Figure 2 , the auxiliary umbrella cover 100 includes a first end 102 and a second end 103, and the auxiliary umbrella cover 100 spirally winds from the first end 102 to the second end 103. The distance of the auxiliary umbrella cover 100 along the inner wall 101 from the first end 102 to the second end 103 is defined as the length of the auxiliary umbrella cover 100, and the distance of the spiral umbrella skirt 210 along the root from one end of the insulator 200 to the other end of the insulator 200 is defined as the length of the spiral umbrella skirt 210. At the same time, the spiral umbrella skirt 210 continuously surrounding the outer periphery of the insulator 200 by 360° 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 a plurality of single-turn spiral umbrella skirts connected in sequence in the axial direction of the insulator 200, and the auxiliary umbrella cover 100 at least continuously covers the upper surface of one single-turn spiral umbrella skirt.

[0029] In an embodiment, the length of the auxiliary umbrella cover 100 is D~1.5D, that is, when the auxiliary umbrella cover 100 covers the spiral umbrella skirt 210, the auxiliary umbrella cover 100 can cover one to one and a half turns of the spiral umbrella skirt 210, at which time the auxiliary umbrella cover 100 can be stably and reliably bonded to the spiral umbrella skirt 210. This is because when the length of the auxiliary umbrella cover 100 is less than D, there is a gap in the circumferential direction of the spiral umbrella skirt 210, that is, the auxiliary umbrella cover 100 does not completely cover the spiral umbrella skirt 210, forming a channel for liquid flow on the spiral umbrella skirt 210, thereby failing to achieve the ability of the insulator 200 to resist ice flash, rain flash, and pollution flash; when the length of the auxiliary umbrella cover 100 is greater than 1.5D, the auxiliary umbrella cover 100 can achieve the ability of the insulator 200 to resist ice flash, rain flash, and pollution flash, but the material is increased, resulting in a higher cost.

[0030] At the same time, in the present embodiment, the aged spiral umbrella skirt 210 does not need to be removed, and the auxiliary umbrella cover 100 is directly bonded to the aged spiral umbrella skirt 210, which effectively solves the problem of aging of the insulator 200 and reduces the maintenance cost of the insulator 200.

[0031] In combination Figure 3In another embodiment, the auxiliary umbrella sleeve 100 further comprises a glue blocking tape 121 and a spill-proof edge 122. The glue blocking tape 121 is arranged on the inner wall 101 of the auxiliary umbrella sleeve 100, extending from the inner wall 101 of the auxiliary umbrella sleeve 100 along the axial direction of the insulator 200 towards the upper surface 104 of the auxiliary umbrella sleeve 100, forming a continuous circumferential inner cavity on the upper surface 104 of the auxiliary umbrella sleeve 100, so that the glue 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 glue blocking tape 121 is in contact with the sheath 230. The length of the glue blocking tape 121 along the axial direction of the insulator 200 is defined as the length of the glue blocking tape 121, which is 5mm-30mm in this embodiment. The glue blocking tape 121 is integrally formed with the auxiliary umbrella sleeve 100, and the inner surface of the glue blocking tape 121 is a glue-free area, i.e. the inner surface of the glue blocking tape 121 is not coated with adhesive. The glue-free area can prevent the adhesive from being squeezed out of the auxiliary umbrella sleeve 100 and remaining on the non-adhesive surface of the sheath 230, and the glue blocking tape 121 can confine the adhesive to the lower surface 105 of the auxiliary umbrella sleeve 100. Moreover, the presence of the glue blocking tape 121 can make the fixation between the auxiliary umbrella sleeve 100 and the insulator 200 more secure and less susceptible to external pollution. The spill-proof edge 122 is provided with two, respectively located at the first end 101 and the second end 102 of the auxiliary umbrella sleeve 100, and the two spill-proof edges 122 respectively extend from the first end 101 and the second end 102 of the auxiliary umbrella sleeve 100 along the circumferential direction of the auxiliary umbrella sleeve 100. The length of the spill-proof edge 122 along the circumferential direction of the auxiliary umbrella sleeve 100 is defined as the length of the spill-proof edge 122, which is 5mm-30mm in this embodiment. The spill-proof edge 122 is integrally formed with the auxiliary umbrella sleeve 100, and the lower surface of the spill-proof edge 122 is a glue-free area, i.e. the lower surface of the spill-proof edge 122 is not coated with adhesive. The glue-free area can prevent the adhesive from being squeezed out of the auxiliary umbrella sleeve 100 and remaining on the non-adhesive surface of the sheath 230, and the spill-proof edge 122 can confine the adhesive to the lower surface 105 of the auxiliary umbrella sleeve 100. Moreover, the presence of the spill-proof edge 122 can make the fixation between the auxiliary umbrella sleeve 100 and the insulator 200 more secure and less susceptible to external pollution.

[0032] In the embodiment, the adhesive is RTV paint. The lower surface 105 of the auxiliary umbrella cover 100 and the upper surface of the spiral umbrella skirt 210 are both coated with the adhesive, so that when the auxiliary umbrella cover 100 is bonded to the spiral umbrella skirt 210, there is a gap between the lower surface 105 of the auxiliary umbrella cover 100 and the upper surface of the spiral umbrella skirt 210, which is filled with the adhesive, thereby fully bonding the auxiliary umbrella cover 100 to the spiral umbrella skirt 210. The gap between the auxiliary umbrella cover 100 and the spiral umbrella skirt 210 is 0.5-1 mm. This method is firmly bonded, has a long service life, low cost, and is easy to manufacture. When the auxiliary umbrella cover 100 covers the spiral umbrella skirt 210, the gap between the auxiliary umbrella cover 100 and the spiral umbrella skirt 210 is coated with the adhesive, i.e. the inner wall 101 of the auxiliary umbrella cover 100 is coated with the adhesive, so that the auxiliary umbrella cover 100 is tightly bonded to the spiral umbrella skirt 210, and the auxiliary umbrella cover 100 smoothly transitions to the sheath 230, preventing dirt or rain and snow from entering the gap between the auxiliary umbrella cover 100, the spiral umbrella skirt 210, and the sheath 230, thereby avoiding affecting the insulation performance of the insulator 200 and the degree of firmness of the auxiliary umbrella cover 100 and the service life of the auxiliary umbrella cover 100. Further, after the auxiliary umbrella cover 100 covers the spiral umbrella skirt 210, anti-pollution flashover paint is sprayed on the outside of the insulator 200, and the anti-pollution flashover paint is RTV paint, so that the outside of the auxiliary umbrella cover 100, the spiral umbrella skirt 210, and the sheath 230 all have an RTV coating, thereby making the insulator 200 have excellent hydrophobicity and water migration, while being resistant to ultraviolet light, ozone, and environmental erosion, improving the surface properties of the insulator 200, and effectively protecting the insulator 200 from damage. In other embodiments, the adhesive can also be other paint, as long as it can tightly connect the auxiliary umbrella cover and the spiral umbrella skirt, which is not limited herein.

[0033] In combination Figures 4-5 One or more auxiliary umbrella covers 100 can be provided on one insulator 200, and the first end 102 and the second end 103 of the auxiliary umbrella cover 100 are both formed with a joint 110. When multiple auxiliary umbrella covers 100 are provided on the insulator 200, the multiple auxiliary umbrella covers 100 are spaced apart in the axial direction of the insulator 200, and the joints 110 of adjacent auxiliary umbrella covers 100 are arranged staggered, so that the joints 110 of adjacent auxiliary umbrella covers 100 are not on a vertical line, thereby preventing liquid impurities such as rainwater from forming a straight line at the joints 110 of the auxiliary umbrella covers 100 when falling downward, 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, so that the insulator 200 appears to flash over.

[0034] In an embodiment, the length of the single-turn spiral umbrella skirt is D, and the length of the auxiliary umbrella cover 100 is 1.5D, that is, the auxiliary umbrella cover 100 can cover the length of one and a half turns of the spiral umbrella skirt 210, and at this time, the joint 110 of the auxiliary umbrella cover 100 at the first end 102 and the second end 103 is located on the same radial, and the joints 110 of adjacent auxiliary umbrella covers 100 are arranged staggered by 150°, that is, the first end 102 of one auxiliary umbrella cover 100 is staggered by 150° with the first end 102 of the adjacent other auxiliary umbrella cover 100 with the axis of the insulator 220 as the center, or the second end 103 of one auxiliary umbrella cover 100 is staggered by 150° with the second end 103 of the adjacent other auxiliary umbrella cover 100 with the axis of the insulator 220 as the center. Further, the joints 110 of adjacent auxiliary umbrella covers 100 are arranged staggered, so that the joints 110 of the auxiliary umbrella cover 100 are not all on a vertical line, ensuring that when liquid impurities such as rainwater drip downward, they cannot be connected in a straight line at the joints 110 of the auxiliary umbrella cover 100, reducing the flashover phenomenon of the insulator 200.

[0035] In another embodiment, the spiral umbrella skirt 210 includes umbrella skirts arranged at intervals and having inconsistent outer diameters, the spiral umbrella skirt 210 with a larger outer diameter is defined as a wide umbrella skirt, and the spiral umbrella skirt 210 with a smaller outer diameter is defined as a narrow umbrella skirt (not shown in the figure), that is, the outer diameter of the wide umbrella skirt is larger than that of the narrow umbrella skirt. The spiral umbrella skirt 210 is composed of the wide umbrella skirts and the narrow umbrella skirts between every two adjacent wide umbrella skirts, and the auxiliary umbrella cover 100 is arranged on the wide umbrella skirt. The length of the wide umbrella skirt between two adjacent narrow umbrella skirts is defined as L, and at this time, the length of the auxiliary umbrella cover 100 is also L, that is, the auxiliary umbrella cover 100 can completely cover the wide umbrella skirt between two adjacent narrow umbrella skirts. The outer diameter of the auxiliary umbrella cover 100 is larger than that of the wide umbrella skirt, and the outer diameter of the wide umbrella skirt is larger than that of the narrow umbrella skirt, so that the adhesive has a larger coating area, is firmly bonded, has good rigidity, and makes the insulator 200 have excellent anti-deformation and excellent pollution wet flashover resistance, and can greatly reduce the consumption of the umbrella skirt material of the insulator 200.

[0036] The auxiliary umbrella cover of the present application is closely bonded to the spiral umbrella skirt, and for the insulator that has been in operation for a long time, the spiral umbrella skirt has a long-term aging problem, and the auxiliary umbrella cover can repair the aging spiral umbrella skirt, effectively solving the problem of insulator aging, reducing the maintenance cost of the insulator, and the auxiliary umbrella cover has a long service life and is not easy to be polluted and damaged, improving the anti-ice flashover, anti-rain flashover and anti-pollution flashover capacity of the insulator.

[0037] At the same time, the auxiliary umbrella cover not only increases the creepage distance of the insulator, but also has the effect of shielding rain and snow, protecting the insulator from rain and snow erosion, improving the wet withstand voltage of the insulator, and further improving the insulation effect.

[0038] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made according to the content of the present application specification and drawings, is also included in the patent protection scope of the present application.

Claims

1. An auxiliary umbrella for covering an insulator in operation, characterized in that, The insulator comprises an insulator body and a sheath arranged outside the insulator body, and a spiral shed which is continuously helical along the circumference of the sheath in the axial direction of the insulator, the spiral shed comprising a plurality of single-turn spiral sheds connected in sequence in the axial direction of the insulator, the auxiliary shed being a spiral single-piece shed, the auxiliary shed being bonded to the upper surface of the spiral shed by an adhesive, the auxiliary shed continuously covering the upper surface of at least one single-turn spiral shed.

2. The secondary sheath of claim 1, wherein, The outer diameter of the auxiliary shed is greater than the outer diameter of the spiral shed.

3. The secondary umbrella cover of claim 1, wherein, The length of the single-turn spiral shed is D, and the length of the auxiliary shed is D-1.5D.

4. The secondary umbrella cover of claim 1, wherein, The auxiliary shed is provided with a glue-blocking strip, the glue-blocking strip being arranged on the inner wall of the auxiliary shed, and the length of the glue-blocking strip being 5-30 mm.

5. The secondary umbrella cover of claim 1, wherein, The auxiliary shed is provided with an anti-overflow edge, the anti-overflow edge being located at the first end and the second end of the auxiliary shed, and the length of the anti-overflow edge being 5-30 mm.

6. The secondary umbrella cover of claim 1, wherein, The gap between the auxiliary shed and the spiral shed is 0.5-1 mm.

7. The secondary umbrella cover of claim 1, wherein, The thickness of the auxiliary shed gradually decreases from the root to the outer edge.

8. The secondary umbrella cover of claim 1, wherein, The spiral shed comprises a wide shed and a narrow shed, and the auxiliary shed is arranged on the wide shed.

9. The secondary umbrella cover of claim 1, wherein, A plurality of auxiliary sheds are arranged on the insulator in the axial direction.

10. The secondary umbrella cover of claim 9, wherein, The seams of adjacent auxiliary sheds are staggered.

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