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

Abstract

The invention discloses a cementing type double-umbrella-shaped and three-umbrella-shaped suspension type polymer composite string insulator unit. The polymer composite string insulator unit comprises a steel cap metal element, a steel foot metal element, an insulating core element, a polymer protective sleeve and a polymer skirt. 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, the insulating core element is arranged between the cone head portion and the cavity, the center of the insulating core element is provided with a cementing portion which is a cavity of an inverted cone shape, the polymer protective sleeve wraps the outer surface of the insulating core element, the polymer skirt of a double-umbrella-shaped or three-umbrella-shaped structure is disposed on the outer surface of the polymer protective sleeve, 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 composite 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 po...

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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