Cementing type double-umbrella-shaped and three-umbrella-shaped disk-shaped suspension type polymer string insulator unit

Abstract

The invention discloses a cementing type double-umbrella-shaped and three-umbrella-shaped suspension type polymer string insulator unit. The polymer string insulator unit is characterized by comprising a steel cap metal element and a steel foot metal element, wherein a cavity with a U-shaped section is formed in the steel cap metal element, the steel foot metal element is provided with a cone head portion matched with the cavity, the cone head portion of the steel foot metal element is arranged in the cavity of the steel cap metal element, a polymer insulating element is arranged between the cone head portion and the cavity, the polymer insulating element comprises a skirt of a double-umbrella-shaped or three-umbrella-shaped structure, the center of the skirt is provided with a cementing portion which is a cavity of an inverted cone shape, the cone head portion of the steel foot metal element is integrated with the cementing portion in a cementing mode through an adhesive, and the cavity of the steel cap metal element is integrated with the cementing portion in a cementing mode through an adhesive. The polymer string insulator unit has the advantages of preventing bird damages, and being resistant to wind and sand, resistant to damages caused by external force and capable of assisting climbing.

Description

technical field [0001] The invention relates to a composite insulator, in particular to a glue-mounted double-umbrella and triple-umbrella disk-shaped suspension polymer insulator string element. Background technique [0002] Polymer insulators are favored by the industry because of their great advantages over porcelain and glass insulators in terms of weight, zero measurement value, pollution flashover voltage resistance, and no self-explosion, especially the high pollution flashover voltage. The study found that there is a certain relationship between the shed structure of the insulator and the pollution flashover voltage, so that the pollution flashover voltage of polymer insulators with the same other conditions but different shed structures is different. [0003] The influence of the umbrella diameter on the pollution flashover characteristics of polymer insulators is as follows: the increase of the umbrella diameter increases the equivalent diameter of the polymer insu...

AI Technical Summary

Problems solved by technology

The decrease of the umbrella spacing can increase the creepage distance of the polymer insulator under the condition of a certain insulation height, but the pollution flashover voltage does not increase linearly with the increase of the creepage distance, and the umbrella spacing is too small, especially for the prismatic Protruding bell-shaped products are prone to bridging between umbrellas, and the utilization rate of creepage distance is relatively reduced

[0005] Polymer insulators operate in a wide geographical range, and different regions have their own geographical particularities, resulting in complex operating conditions. At the same time, there are external uncertainties in the transportation, installation and maintenance of polymer insulators, which affect the safe operation of polymer insulators.

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