Fouling fog, ice and snow flash and bird strike prevention double-dovetail type insulator shielding cover and protection method thereof

Abstract

The invention discloses a fouling fog, ice and snow flash and bird strike prevention double-dovetail type insulator shielding cover and a protection method thereof. The fouling fog, ice and snow flash and bird strike prevention double-dovetail type insulator shielding cover comprises two wedge-shaped wire grooves for a lead to penetrate, wherein the two wedge-shaped wire grooves are formed in a circular-arc-shaped casing; a flexible annular inner skirt which is matched with a porcelain bottle is arranged in the circular-arc-shaped casing; the annular inner skirt is provided with two lead grooves which are matched with the wedge-shaped wire grooves respectively; the circular-arc-shaped casing is provided with a conical spine; each wedge-shaped wire groove and each lead groove are filled with wedge-shaped sealing strips. The fouling fog, ice and snow flash and bird strike prevention double-dovetail type insulator shielding cover is widely applied to a pin insulator which is arranged on a 35 kv and 35 kv below voltage grade alternating current and direct current power transmission line to prevent disasters such as the fouling flash, the fog flash, the ice flash, the snow flash, the bird strike and the lightning stroke, the insulation is good, the weather resistance is good, the installation and the detachment are convenient, the durable effect is achieved, the cost is low, the functions are diversified, and the service life is more than 8 years.

Description

technical field [0001] The invention belongs to the technical field of pin-type insulator protection equipment for AC and DC power transmission and transformation lines of 35kV and below, and particularly relates to a double-dovetail insulator shielding cover and a protection method for preventing pollution, fog, ice, snow, and bird damage. Background technique [0002] Due to the advantages of low engineering cost, fast construction and convenient use, high and low voltage pin insulators in the power grid are widely used in AC and DC power transmission lines with a voltage level of 35kv and below, especially in 10kv lines, 75% of straight pole insulators use pin type Insulators; however, due to the structural design problems of the needle bottle, a large amount of pollution is easy to accumulate in the grooves between the supporting wires and the effective insulation distance between the insulator and the cross-arm is short, resulting in smog, fog, and cover. Under severe w...

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Problems solved by technology

[0002]High and low voltage pin insulators in power grids are widely used in AC and DC power transmission and transformation lines with a voltage level of 35kv and below due to their low engineering cost, fast construction, and convenient use. In the 10kv line, 75% of the straight rod insulators use pin insulators; but due to the structural design problems of the pin bottle, a large amount of pollution is easy to accumulate in the grooves between the supporting wires and the effective distance between the insulator and the cross arm. Defects such as short insulation spacing, resulting in pollution flashover, fog flashover, ice flashover, snow flashover, etc. Line ground tripping and pollution flashover accidents seriously threaten the safe operation and power supply reliability of AC and DC power transmission and transformation lines

[0003]At present, the anti-pollution flashover, anti-fog flashover, anti-icing flashback, anti-snow flashover, and bird damage prevention of pin insulators for AC and DC power transmission and transformation lines up to 35kv Few measures have been taken. According to the survey data: FNBW high-voltage transmission line insulator bird-proof cover and other related products of the same type, pressure equalizing rings, anti-pollution flashover auxiliary sheds and other measures can only be used for 35kv and above High-voltage suspension insulator strings; pin-type insulators are not suitable for installation and application in 35kv and below AC and DC transmission and transformation lines. According to the statistics of power grid operation data, these measures, especially for the actual effect of anti-fog flashing of insulators, are average. The measures such as anti-bird thorns and anti-bird devices installed on the power transmission and transformation line are not very satisfactory in anti-bird damage, and their functions are single; The needle bottles of the following AC and DC transmission and transformation lines are coated with RTV anti-pollution flashover coatings, but the survey results show that even the insulators that have been coated with RTV will still be polluted when the insulators, towers and cross-arms are covered by heavy fog, ice, and snow. Flash and ground tripping accidents

At present, there are few disaster prevention and mitigation devices and effective preventive measures for insulators on the transmission and transformation lines of various voltage levels in terms of fog flash, and the effect is also the worst.

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