800kV hollow composite insulator

Abstract

The 800kV hollow composite insulator comprises a top end flange, an insulating tube, an umbrella skirt and a bottom end flange, the umbrella skirt is formed by high-temperature vulcanized silicone rubber in an injection molding mode and wraps the insulating tube, and the two ends of the insulating tube are fixedly connected with the top end flange and the bottom end flange in a sleeved and cementing mode respectively. The umbrella skirts comprise oversized umbrellas, large umbrellas and small umbrellas, the multiple oversized umbrellas are uniformly arranged on the umbrella skirts, the small umbrellas and the large umbrellas are sequentially and alternately arranged at the two ends of the umbrella skirts and the interval sections of the oversized umbrellas, and the small umbrellas are arranged on the two sides close to the oversized umbrellas; large umbrellas are arranged at the positions, close to the top end flange and the bottom end flange, of the umbrella skirts. According to the utility model, the extra-large umbrella structure is added, and the extra-large umbrella structure, the large umbrella and the small umbrella are integrally formed through injection, so that the pollution flashover and rain flashover resistance of the insulator is improved, the pollution resistance of the insulator is improved, the influence of rain, snow, hail and sand wind on the insulator is reduced, and electric arc drift is effectively avoided; and the operation requirements of an extra-high voltage power grid are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of 800kV hollow composite insulators for improving the anti-pollution performance of insulator, belong to ultra-high voltage electrical technical field. BACKGROUND

[0002] With the construction of national ultra-high voltage power grid, the safe operation of AC and DC high voltage electrical products is increasingly prominent, and the performance requirements of insulators against rain flashover and pollution flashover are increasingly high;The outer insulation of the insulators and other power equipment currently in operation mostly adopts large and small umbrella, large and small small umbrella or equal-diameter umbrella structure, which cannot fully exert the anti-rain flashover and pollution flashover capability under the condition of a certain distance of insulator;Or auxiliary large umbrella skirt is installed to improve the anti-pollution performance, but the installation operation of auxiliary umbrella skirt is complex, and if the bonding with product umbrella skirt is insufficient and not firm, cracking is easy to occur, which is easy to cause bonding interface liquid;Leading to surface discharge of insulator, and then pollution flashover occurs. SUMMARY

[0003] The utility model solves the technical problems existing in the prior art, and provides a kind of 800kV hollow composite insulator with reasonable structure, reliable performance and improved anti-rain flashover and pollution flashover.

[0004] To solve this technical problem, the utility model provides a kind of 800kV hollow composite insulator, including top flange, insulating tube, umbrella skirt and bottom flange, the umbrella skirt is covered on the insulating tube by high-temperature vulcanized silicone rubber injection molding, and the insulating tube is fixedly connected with the top flange and the bottom flange by sleeving and gluing;The umbrella skirt includes super-large umbrella, large umbrella and small umbrella, multiple super-large umbrellas are evenly arranged on the umbrella skirt, and the small umbrella and the large umbrella are alternately arranged at the two ends of the umbrella skirt and the interval section of the super-large umbrella, wherein the two sides close to the super-large umbrella are small umbrellas;The umbrella skirt close to the top flange and close to the bottom flange is provided with large umbrella.

[0005] The top flange includes base one, sleeve part one, reinforcing rib one and fixing hole one, the sleeve part one is vertically arranged at one end of the base one, multiple reinforcing ribs one are arranged between the base one and the sleeve part one, and multiple fixing holes one are arranged on the base one for connecting the insulator with the lightning arrester or switch;The sleeve part one is fixedly connected with the insulating tube by sleeving and gluing;The base one, the sleeve part one and the reinforcing rib one are integrally formed by high-strength cast aluminum alloy, or they are fixedly connected and formed by welding method.

[0006] The insulating tube is composed of glass fiber yarn and matrix material;The matrix material is epoxy resin, vinyl ester resin or polyurethane resin.

[0007] The included angle of each umbrella on the umbrella skirt is 13°, and the upward inclination angle is 6°.

[0008] The number of the super large umbrella is ten, the number of the large umbrella is eighty-eight, and the number of the small umbrella is ninety-seven; eight large umbrellas and eight small umbrellas are alternately arranged near the top end flange; eight large umbrellas and eight small umbrellas are alternately arranged near the bottom end flange; and the remaining middle section is alternately arranged with nine small umbrellas and eight large umbrellas.

[0009] The bottom end flange comprises a base two, a sleeve part two, a reinforcing rib two and a fixing hole two, the sleeve part two is vertically arranged at one end of the base two, a plurality of reinforcing rib twos are arranged between the base two and the sleeve part two, and a plurality of fixing hole twos are arranged on the base two for connecting the insulator and the transition tank body or the base; and the sleeve part two is sleeved and fixed with the insulating tube by glue.

[0010] The base two, the sleeve part two and the reinforcing rib two are integrally formed by high-strength cast aluminum alloy, or are fixedly connected and formed by a welding method.

[0011] The diameter of the super large umbrella is 1002mm, the diameter of the large umbrella is 924mm, and the diameter of the small umbrella is 882mm.

[0012] The spacing between two adjacent super large umbrellas is 670.5mm, the spacing between two adjacent large umbrellas is 74.5mm, the spacing between two adjacent small umbrellas is 74.5mm, and the spacing between the super large umbrella and the first adjacent large umbrella is 74.5mm.

[0013] The super large umbrella, the large umbrella and the small umbrella are integrally injection molded.

[0014] Beneficial effects: the super large umbrella structure is added, and the super large umbrella, the large umbrella and the small umbrella are integrally injection molded, the ability of the insulator to resist pollution flashover and rain flashover is increased, the pollution resistance of the insulator is improved, the influence of rain, snow, hail and sand on the insulator is reduced, arc drift is effectively avoided, and the operation requirements of the extra-high voltage power grid are met. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic cross-sectional view of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the umbrella skirt of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the umbrella of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the insulating tube of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the end flange one of the utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the second end flange of this utility model.

[0022] In the diagram: 1. Top flange; 2. Insulating tube; 3. Umbrella skirt; 4. Bottom flange; 11. Base 1; 12. Sleeve 1; 13. Reinforcing rib 1; 14. Fixing hole 1; 31. Extra-large umbrella; 32. Large umbrella; 33. Small umbrella; 41. Base 2; 42. Sleeve 2; 43. Reinforcing rib 2; 44. Fixing hole 2. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1-7 As shown, this utility model provides an 800kV hollow composite insulator, including a top flange 1, an insulating tube 2, a skirt 3, and a bottom flange 4. The skirt 3 is injection molded from high-temperature vulcanized silicone rubber and coated onto the insulating tube 2 (high-temperature vulcanized silicone rubber is a rubber formed by adding reinforcing fillers and other additives to high molecular weight polyorganosiloxane, using organic peroxide as a vulcanizing agent, and cross-linking at high temperature). The two ends of the insulating tube 2 are respectively fitted and glued to the top flange 1 and the bottom flange 4. The skirt 3 includes extra-large umbrellas 31, large umbrellas 32, and small umbrellas 33. Multiple extra-large umbrellas 31 are evenly arranged on the skirt 3. The two ends of the skirt 3 and the intervals between the extra-large umbrellas 31 are alternately arranged with small umbrellas 33 and large umbrellas 32, with small umbrellas 33 on both sides near the extra-large umbrellas 31. Large umbrellas 32 are set near the top flange 1 and near the bottom flange 4 of the skirt 3.

[0025] The umbrella skirt 3 is integrally injection molded from high-temperature vulcanized silicone rubber and coated onto the insulating tube 2. High-temperature vulcanized silicone rubber is a type of rubber made by adding reinforcing fillers and other additives to high molecular weight polyorganosiloxane, using organic peroxide as a vulcanizing agent, and cross-linking at high temperature. The reinforcing filler of high-temperature vulcanized silicone rubber can be silica, which can increase the strength of the vulcanized rubber tenfold. Adding various additives reduces the cost of the rubber, improves the performance of the rubber compound, and endows the vulcanized rubber with various special properties such as flame retardancy and conductivity.

[0026] The top flange 1 includes a base 11, a sleeve 12, a reinforcing rib 13, and a fixing hole 14. The sleeve 12 is vertically disposed at one end of the base 11. Multiple reinforcing ribs 13 are disposed between the base 11 and the sleeve 12. Multiple fixing holes 14 are disposed on the base 11 for connecting the insulator to the surge arrester or switch. The sleeve 12 is fitted and glued to the insulating tube 2. The base 11, the sleeve 12, and the reinforcing ribs 13 are integrally formed from high-strength cast aluminum alloy, or are fixedly connected by welding.

[0027] The insulating tube 2 is composed of glass fiber yarn and a matrix material; the matrix material is epoxy resin, vinyl ester resin, or polyurethane resin. In this embodiment, the matrix material is epoxy resin. During the molding process of the insulating tube 2, the epoxy resin adhesive and glass fiber yarn undergo a series of physicochemical changes to form a cured epoxy resin. Simultaneously, the cured epoxy resin forms an interface layer with superior structure and performance between the epoxy resin adhesive and the glass fiber yarn. This interface layer bonds the glass fiber yarn and the epoxy resin adhesive into a whole, giving the insulating tube 2 excellent mechanical and electrical properties.

[0028] The included angle of each umbrella on the umbrella skirt 3 is 13°, and the upward tilt angle is 6° (e.g., Figure 4 As shown in the figure, the angle control of the tilt angle is beneficial to improving the self-cleaning ability of each umbrella.

[0029] The number of extra-large umbrellas 31 is ten, the number of large umbrellas 32 is eighty-eight, and the number of small umbrellas 33 is ninety-seven. Near the top flange 1, eight large umbrellas 32 and eight small umbrellas 33 are arranged alternately. Near the bottom flange 4, eight large umbrellas 32 and eight small umbrellas 33 are arranged alternately. The remaining middle section is arranged with nine small umbrellas 33 and eight large umbrellas 32 alternately. The control of the skirt length of the umbrella helps to avoid bridging between adjacent umbrella skirts under rain conditions.

[0030] The bottom flange 4 includes a base 41, a sleeve 42, a reinforcing rib 43, and a fixing hole 44. The sleeve 42 is vertically disposed at one end of the base 41. Multiple reinforcing ribs 43 are disposed between the base 41 and the sleeve 42. Multiple fixing holes 44 are disposed on the base 41 for connecting the insulator to the transition tank or the base. The sleeve 42 is fitted and glued to the insulating tube 2.

[0031] The base 41, sleeve 42, and reinforcing rib 43 are integrally formed from high-strength cast aluminum alloy, or are fixedly connected by welding.

[0032] The extra-large umbrella 31 has a diameter of 1002mm, the large umbrella 32 has a diameter of 924mm, and the small umbrella 33 has a diameter of 882mm.

[0033] The distance between two adjacent extra-large umbrellas 31 is 670.5mm, the distance between two adjacent large umbrellas 32 is 74.5mm, and the distance between two adjacent small umbrellas 33 is 74.5mm; the distance between the extra-large umbrella 31 and its first adjacent large umbrella 32 is 74.5mm.

[0034] The extra-large umbrella 31, the large umbrella 32, and the small umbrella 33 are integrally injection molded.

[0035] This invention adds an extra-large umbrella structure and integrally injection molds it with the large and small umbrellas, which increases the insulator's resistance to pollution flashover and rain flashover, improves the insulator's pollution resistance, reduces the impact of rain, snow, hail, and sandstorms on the insulator, and effectively avoids arc drift.

[0036] The above-described embodiments of this utility model are merely illustrative examples and are not the only ones. All modifications within the scope of this utility model or equivalent to this utility model are encompassed by this utility model.

Claims

1. An 800kV hollow composite insulator, characterized in that: The device includes a top flange (1), an insulating tube (2), a skirt (3), and a bottom flange (4). The skirt (3) is made of high-temperature vulcanized silicone rubber injection molding and covers the insulating tube (2). The two ends of the insulating tube (2) are respectively fitted and glued to the top flange (1) and the bottom flange (4). The skirt (3) includes an extra-large umbrella (31), a large umbrella (32), and a small umbrella (33). Multiple extra-large umbrellas (31) are evenly arranged on the skirt (3). The two ends of the skirt (3) and the intervals between the extra-large umbrellas (31) are arranged alternately with small umbrellas (33) and large umbrellas (32). The sides near the extra-large umbrellas (31) are small umbrellas (33). The skirt (3) near the top flange (1) and near the bottom flange (4) are set with large umbrellas (32).

2. The 800kV hollow composite insulator according to claim 1, characterized in that: The top flange (1) includes a base (11), a sleeve (12), a reinforcing rib (13), and a fixing hole (14). The sleeve (12) is vertically disposed at one end of the base (11). Multiple reinforcing ribs (13) are disposed between the base (11) and the sleeve (12). Multiple fixing holes (14) are disposed on the base (11) for connecting the insulator to the surge arrester or switch. The sleeve (12) is fitted and glued to the insulating tube (2). The base (11), the sleeve (12), and the reinforcing ribs (13) are integrally formed with high-strength cast aluminum alloy, or fixedly connected by welding.

3. The 800kV hollow composite insulator according to claim 1, characterized in that: The insulating tube (2) is composed of glass fiber yarn and a matrix material; the matrix material is epoxy resin, vinyl ester resin or polyurethane resin.

4. The 800kV hollow composite insulator according to claim 1, characterized in that: The included angle of each umbrella on the umbrella skirt (3) is 13° and the upward tilt angle is 6°.

5. The 800kV hollow composite insulator according to claim 1, characterized in that: The number of extra-large umbrellas (31) is ten, the number of large umbrellas (32) is eighty-eight, and the number of small umbrellas (33) is ninety-seven; near the top flange (1), eight large umbrellas (32) and eight small umbrellas (33) are arranged alternately; near the bottom flange (4), eight large umbrellas (32) and eight small umbrellas (33) are arranged alternately; and in the remaining middle section, nine small umbrellas (33) and eight large umbrellas (32) are arranged alternately.

6. The 800kV hollow composite insulator according to claim 1, characterized in that: The bottom flange (4) includes a base two (41), a sleeve part two (42), a reinforcing rib two (43) and a fixing hole two (44). The sleeve part two (42) is vertically arranged at one end of the base two (41). Multiple reinforcing ribs two (43) are arranged between the base two (41) and the sleeve part two (42). Multiple fixing holes two (44) are provided on the base two (41) for connecting the insulator to the transition tank or the base. The sleeve part two (42) is fitted and glued to the insulating tube (2).

7. The 800kV hollow composite insulator according to claim 6, characterized in that: The base 2 (41), sleeve 2 (42), and reinforcing rib 2 (43) are integrally formed from high-strength cast aluminum alloy, or are fixedly connected by welding.

8. The 800kV hollow composite insulator according to claim 1, characterized in that: The extra-large umbrella (31) has a diameter of 1002 mm, the large umbrella (32) has a diameter of 924 mm, and the small umbrella (33) has a diameter of 882 mm.

9. The 800kV hollow composite insulator according to claim 1, characterized in that: The distance between two adjacent extra-large umbrellas (31) is 670.5 mm, the distance between two adjacent large umbrellas (32) is 74.5 mm, and the distance between two adjacent small umbrellas (33) is 74.5 mm; the distance between the extra-large umbrella (31) and its first adjacent large umbrella (32) is 74.5 mm.

10. The 800kV hollow composite insulator according to any one of claims 1-9, characterized in that: The extra-large umbrella (31) is integrally injection molded with the large umbrella (32) and the small umbrella (33).

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