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Preparation process of windage yaw prevention jumper insulator for 500kV transmission line

A preparation process and technology for transmission lines, applied in circuits, insulators, suspension/strain insulators, etc., can solve the problems of insulators that cannot be adapted to wind-proof bias jumpers, and achieve the purpose of preventing wind bias flashover, ensuring stability, and improving strength. Effect

Pending Publication Date: 2019-11-01
ZHEJIANG ELECTRIC POWER DESIGN INST +2
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a preparation process for wind deflection jumper insulators for 500kV transmission lines, to solve the technical problem that the existing traditional insulator preparation process cannot adapt to the preparation of wind deflection jumper insulators without 500kV transmission lines

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  • Preparation process of windage yaw prevention jumper insulator for 500kV transmission line

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Embodiment Construction

[0030] Such as figure 1 As shown, a preparation process of a wind deflection jumper insulator for a 500kV transmission line, the wind deflection jumper insulator includes a core 1 and a sheath 2 coated on the outside of the core 1, and the sheath 2 is provided with Umbrella skirt 3, the core body 1 includes a hollow tube 4 and a polyurethane insulator 5 filled in the hollow tube 4, the core body 1 includes a high-voltage end 7 and a low-voltage end 6, and the low-voltage end 6 includes a first mandrel 61 And the flange 62, the first mandrel 61 is arranged in the hollow pipe 4, the flange 62 is arranged on the first mandrel 61, and the high pressure end 7 includes the second mandrel 71 and the connecting plate 72 , the second mandrel 71 is arranged in the hollow tube 4, the connecting plate 72 is arranged on the second mandrel 71, and the polyurethane insulator 5 is prepared by polyurethane resin; the preparation process includes the following steps in sequence:

[0031] Step ...

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Abstract

The invention relates to a preparation process of a windage yaw prevention jumper insulator for a 500kV transmission line. The windage yaw prevention jumper insulator includes a core body and a sheath, wherein the core body includes a hollow tube and a polyurethane insulator, and the core body includes a high voltage end and a low voltage end. The preparation process includes steps in sequence, hollow tube material selection, sand blasting, inner wall cleaning, vacuum infusion, epoxy resin infusion and sealing forming. The preparation process is advantaged in that the core is configured as a hollow tube and a polyurethane insulator, the polyurethane insulator not only provides a good insulation level for the hollow tube, but also optimizes the weight of the entire core, the requirement oflarge bending moment of a 500kV line vertical fixed windage yaw prevention jumper insulator string is satisfied, through setting a sheath and an umbrella skirt, the core meets the requirements of tracking resistance and creepage, jumper windage yaw flashover of the 500kV transmission line is eliminated, the length of a jumper crossbar can further be shortened to a large extent, and thereby the amount of steels consumed by a tower is further reduced.

Description

technical field [0001] The invention relates to a preparation process of a wind deflection-proof jumper insulator for a 500kV transmission line. Background technique [0002] In recent years, under the influence of strong winds, the drainage jumpers on 500kV transmission lines in many areas of the country have caused flashovers and tripping accidents. harm. According to statistics, in 2018, there were more than 100 wind deflection trips on the 500kV and above lines under the jurisdiction of the State Grid Corporation, covering Jiangsu, Zhejiang, Anhui, Hubei, Henan, Shandong, Shanxi, Beijing, Hebei, Northeast and other places. The wind deflection discharge has a wide range, many times, and great impact, especially in the typhoon-prone areas in the coastal areas. Different from lightning flashover and operation shock flashover, most of the wind deflection flashover occurs under the working voltage, and generally cannot be successfully reclosed, which leads to the outage of ...

Claims

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Application Information

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IPC IPC(8): H01B19/00H01B17/38H01B17/10
CPCH01B17/10H01B17/38H01B19/00
Inventor 劳建明马恒陈稼苗潘峰王宁钱科高义波韦一力
Owner ZHEJIANG ELECTRIC POWER DESIGN INST
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