Ultra high voltage SF6 gas-insulated wall feed-through sleeve

Abstract

The invention relates to an ultra high voltage SF6 gas-insulated wall feed-through sleeve. The ultra high voltage SF6 gas-insulated wall feed-through sleeve comprises an external insulation structure and an electrode structure arranged inside the external insulation structure, wherein the external insulation structure comprises an outdoor insulation sleeve and an indoor insulation sleeve which are connected by virtue of a flange, the electrode structure comprises a conducting rod, an intermediate electrode and a grounding electrode, the outdoor insulation sleeve and the indoor insulation sleeve are at least provided with two adjacent sub sleeves, the sub sleeves are fixed into a whole by virtue of transition pieces, and the two ends of the intermediate electrode are respectively fixed on an outdoor transition piece and an indoor transition piece. The ultra high voltage SF6 gas-insulated wall feed-through sleeve has the advantages that by virtue of innovation of external insulation and an interior electrode structure, electrical properties and bending strength of the sleeve can be obviously improved; compared with the traditional ultra high voltage wall feed-through sleeve, weight of a product self is greatly reduced, mounting is more convenient, operation is more reliable, and manufacturing difficulty and manufacturing cost of external insulation and the whole sleeve are also reduced.

Description

technical field [0001] The invention relates to an ultra-high voltage wall-piercing bushing, in particular to an SF6 gas-insulated bushing used for a live conductor to pass through obstacles such as walls, and is generally installed horizontally. Background technique [0002] At present, the wall-piercing bushings of 550kV and above basically adopt two structures of oil-paper capacitor type and SF6 gas-filled insulation. Generally, composite insulating cylinders are used as external insulation, and porcelain sleeves can also be used. [0003] The main structure of the oil-paper capacitor type wall bushing is: indoor and outdoor insulation + installation flange + outdoor and external insulation, the built-in oil-paper capacitor core is used as the main insulation, and the bushing is filled with insulating oil. The overall quality of the product is heavy. When installed horizontally, the moment at the root of the external insulation is large, the bending strength of the casing...

AI Technical Summary

Problems solved by technology

The bushing with this structure also has problems such as large torque at the root of the outer insulation, low bending strength, and easy air leakage when it is installed horizontally, and the insulation support of the internal intermediate electrode is difficult to handle.

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