Antipollution flashover disk-shaped insulator

Abstract

The invention discloses an antipollution flashover disk-shaped insulator comprising an umbrella tray of a gossan, the lower surface of the parachute tray is provided with annular umbrella ridges and a water dripping edge, the water dripping edge is integrated with the umbrella tray, and a distance h1 between the lowermost end of the water dripping edge and an axis L of a disk-shaped insulator is smaller than a distance h2 between the uppermost end of the water dripping edge and the axis L of the disk-shaped insulator, i.e. the diameter of the lowermost end of the annular water dripping edge is smaller than that of the uppermost end of the water dripping edge. Because the distance h1 between the lowermost end of the water dripping edge and the axis L of the disk-shaped insulator is smaller than the distance h2 between the uppermost end of the water dripping edge and the axis L of the disk-shaped insulator, accumulated dirt on the umbrella tray naturally falls under the action of wind force and rain water, and dust particles in the atmosphere can be blocked from entering the lower surface of the umbrella tray so as to prevent the dust particles from being accumulated on the umbrella ridges on the lower surface of the umbrella tray; and moreover, an insulation ring and a cleaning brush are arranged on the umbrella tray, the accumulated dirt on the umbrella tray can be constantly swept off under the pushing of the wind force, thus the cleanness of the upper surface of the insulator is ensured and the purpose of antipollution flashover is achieved.

Description

technical field [0001] The invention relates to an insulator, in particular to an anti-fouling flashover disc insulator. Background technique [0002] During the long-term operation of the insulator, the dust particles in the atmosphere deposit on the surface to form a dirty layer. In dry weather, the dirty layer has a high resistance and the insulation performance will not be reduced. However, under the weather conditions such as fog, dew, light rain, and snow, After the electrolyte in the dirty layer is wet, the surface conductivity increases and the insulation performance decreases, while the ash in it retains moisture, which promotes the further moisture of the dirty layer, thereby dissolving more electrolyte, causing flashover discharge on the wet surface of the insulator, referred to as pollution flash. The notable feature of insulator pollution flashover is low flashover voltage, which may be as low as 10kV and below. The average flashover voltage of a standard insu...

AI Technical Summary

Problems solved by technology

The contamination on the surface of transmission line insulators is unavoidable, and it needs to be cleaned after a period of time. Generally, manual cleaning, mechanical cleaning or charged water flushing are used. The cost of charged water flushing is relatively high. Lines are generally not cleaned mechanically or washed with charged water. Manual cleaning requires a power outage. The once-a-year power outage cleaning causes huge economic losses to the power system and the national economy. Even so, pollution flashover accidents still occur from time to time

At present, the various insulators used in the power system are mainly self-cleaning by rainwater washing. If there is no rain for a long time, the pollution will be more serious. Often, pollution flashover occurs when there is light rain or fog, causing major blackouts , causing huge losses

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