Charged quantitative oil extracting/resupplying device of oil-minimum electric equipment

Abstract

The invention discloses a charged quantitative oil extracting / resupplying device of oil-minimum electric equipment. The charged quantitative oil extracting / resupplying device comprises a corrugated expander for oil storage, an extruding component and a quantitative oil resupply unit, and is connected with a three-phase casing of a power transformer through a pipeline and various pipeline connectors. Since the oil storage unit is separated from the casing, oil can be extracted from or resupplied into the casing conveniently without power interruption, stressing of the casing, external power field distribution of the casing and work pressure of insulated oil or transformer oil in the casing are not changed, and potential safety hazards are avoided.

Description

technical field [0001] The invention relates to the field of power transmission and distribution, in particular to a live quantitative oil-replenishing / replenishing device for power-less oil-replenishing equipment. Background technique [0002] During the operation of transformers with a voltage level of 110KV and above, the performance of the transformer bushing needs to be tested regularly. The detection is to extract the transformer oil in the transformer bushing. Replenish transformer oil; the traditional oil extraction method needs to open the vent on the top of the bushing to overcome the negative pressure after the entire power supply system is powered off. Strict conditions; 2. The casing oil conservator is not a fully sealed structure, and the cursor of the oil conservator indicates that there is no sufficient oil volume, which requires regular oil replenishment, frequent disassembly, and repeated damage to the seal, which may lead to major accidents such as water i...

AI Technical Summary

Problems solved by technology

[0002] During the operation of transformers with a voltage level of 110KV and above, the performance of the transformer bushing needs to be tested regularly. The detection is to extract the transformer oil in the transformer bushing. Replenish transformer oil; the traditional oil extraction method needs to open the vent on the top of the bushing to overcome the negative pressure after the entire power supply system is powered off. Strict conditions; 2. The casing oil conservator is not a fully sealed structure, and the cursor of the oil conservator indicates that there is no sufficient oil volume, which requires regular oil replenishment, frequent disassembly, and repeated damage to the seal, which may lead to major accidents such as water ingress and moisture; 3 1. The transformer bushing is an oil-less equipment. After multiple samplings, it is necessary to add an appropriate amount of transformer oil, which increases the workload and power outage time.

At present, the corrugated expander with transformer oil is placed on the top of the casing, and metal pipes are used to connect the corrugated expander and the upper exhaust hole of the casing, the oil is taken from the lower part of the casing, and the oil is replenished from the upper part of the casing. However, this kind The method changes the stress on the casing and the distribution of the electric field on the upper part of the casing, which has potential safety hazards

The improved method is to move the corrugated expander downward, so that the oil intake and oil replenishment are both carried out at the lower part of the bushing. However, when the corrugated expander is oily, the pressure is high, which changes the working pressure of the transformer oil inside the bushing, and there is also a safety hazard. Hidden danger

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