Hollow post insulator

Abstract

The invention provides a hollow post insulator. The hollow post insulator comprises a hollow insulating tube, an umbrella skirt which wraps and is fixed on a periphery of the hollow insulating tube, flanges connected to two ends of the hollow insulating tube, and an end sealing structure arranged in the hollow insulating tube. According to the hollow post insulator, the two ends of the insulatingtube are plugged by adopting the end sealing structure; the end sealing structure has two layers, one layer is a sealing end resin layer, and the other layer is a moisture absorption resin layer; anda micro-water content in the insulating tube can be kept below a standard value while sealing performance is ensured, and an internal insulation effect of the insulator is not influenced. The hollow post insulator is filled with a dry gas of 0.1-0.15 Mpa, and the insulator can be suitable for various altitudes and a negative pressure condition is not generated due to a micro-positive pressure state.

Description

technical field [0001] The invention relates to equipment for power transmission and transformation in the electric power industry, in particular to a hollow post insulator. Background technique [0002] At present, composite insulators are mainly divided into two categories, one is hollow composite insulators, and the other is post composite insulators. Conventional post composite insulators are of solid structure. However, post composite insulators with a solid structure are heavy, which is not conducive to transportation and installation. [0003] For this reason, some technicians have proposed hollow post insulators, but purely hollow post insulators need to be strengthened in terms of mechanical strength and overall sealing performance. In addition, general air-filled insulators need to add drying devices to improve the degree of internal drying, but the current common drying devices are metal sieve structures, which reduce the internal insulation distance and lead to ...

AI Technical Summary

Problems solved by technology

However, the post composite insulator with solid structure is heavy, which is not conducive to transportation and installation

[0003] For this reason, some technicians have proposed hollow post insulators, but pure hollow post insulators need to be strengthened in terms of mechanical strength and overall sealing performance

In addition, general air-filled insulators need to add a drying device to improve the degree of internal drying, but the current common drying device is a metal sieve structure, which reduces the internal insulation distance and also leads to higher costs.

Images