Integral type oil-paper high-voltage bushing

Abstract

The invention discloses an integral type oil-paper high-voltage bushing which comprises a glass reinforced plastic cylinder, a conducting rod, an expander, a mounting flange, a base and a voltage-sharing ball, wherein the mounting flange for being connected with a transformer is hermetically arranged in the middle position of the glass reinforced plastic cylinder in a sleeving manner; a silicone rubber umbrella cover is cast on the outer side of the glass reinforced plastic cylinder at a position above the mounting flange, and semi-conductive paint is sprayed on the outer side of the glass reinforced plastic cylinder at a position below the mounting flange and forms an isoelectric cylinder which has the same diameter as the flange; the base is hermetically arranged at the bottom of the glass reinforced plastic cylinder; the conducting rod is inserted in the glass reinforced plastic cylinder and integrated with the mounting flange, the glass reinforced plastic cylinder and the base; the expander is arranged at the top of the glass reinforced plastic cylinder, and the voltage-sharing ball is arranged at the bottom of the glass reinforced plastic cylinder. The integral type oil-paper high-voltage bushing is simple in structure; oil in the bushing is completely isolated from that in the transformer; the probability of failure of the product is greatly reduced; the transformer can be effectively prevented from catching fire and burning; the product has a light weight; the mounting is convenient; the shock resistance and bending resistance are good; maintenance is basically avoided.

Description

technical field [0001] The invention relates to a high-voltage bushing for a transformer, in particular to an integral oil-impregnated paper high-voltage bushing for insulation and mechanical fixation when high voltage is led out of a box in a power system. Background technique [0002] At present, oil-paper capacitive high-voltage bushings for power transformers are composed of oil conservator 1, upper porcelain bushing 3 (air side), flange 4, grounding cylinder, lower porcelain bushing 5 (transformer side), and bottom seat 6, see attached figure 1 , From top to bottom, the conductive rods are connected in series through the strong spring 2, and each element is sealed with a seal. The bushing is affected by air pollution, wind, rain, earthquake, etc. during operation, coupled with the dual effects of its own current and electric field, the operating conditions are extremely harsh. Once there is an insulation failure, it will generally cause the lower porcelain bushing to bu...

AI Technical Summary

Problems solved by technology

The bushing is affected by air pollution, wind, rain, earthquakes, etc. during operation, plus the dual effects of its own current and electric field, and the operating conditions are extremely harsh. Once there is an insulation failure, it will generally cause the lower porcelain bushing to burst, which will lead to the disintegration of the bushing , the oil in the transformer and the oil in the bushing leaked out at the same time, causing a fire

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