Compression connected type double-umbrella-shaped or three-umbrella-shaped disk-shaped suspension-type composite string insulator unit

Abstract

The invention discloses a compression connected type double-umbrella-shaped or three-umbrella-shaped disk-shaped suspension-type composite string insulator unit which comprises a core rod, hardware fittings arranged at the two ends of the core rod, and a protective sleeve arranged on the outside of the core rod in a covering mode. A double-umbrella-shaped or three-umbrella-shaped umbrella skirt extending along the circumference direction of the protective sleeve is arranged on the protective sleeve. The hardware fittings are connected to the core rod in a compression mode. Sealing structures are formed on outer surfaces of the hardware fittings after high-temperature solidification. The compression connected type double-umbrella-shaped or three-umbrella-shaped type disk-shaped suspension-type composite string insulator unit has the advantages of preventing bird troubles, resisting to sand blown by wind, resisting to damage by external force and being capable of assisting climbing.

Description

technical field [0001] The invention relates to a composite insulator, in particular to a crimping double-umbrella and triple-umbrella disk-shaped suspension composite insulator string element. Background technique [0002] Polymer composite 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 composite insulators with the same other conditions but different shed structures have different pollution flashover voltages. [0003] The influence of the umbrella diameter on the pollution flashover characteristics of the composite insulator is as follows: the increase of the umbrella diameter increases the equivalent diameter of t...

AI Technical Summary

Problems solved by technology

If the umbrella spacing is reduced, the creepage distance of the composite insulator can be increased when the insulation height is constant, but the pollution flashover voltage does not increase linearly with the increase of the creepage distance. Bell-shaped products, bridging between umbrellas is prone to occur, and the utilization rate of creepage distance is relatively reduced

[0005] Composite 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 composite insulators, which affect the safe operation of composite insulators

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