Automatic stop device for vacuum oil filling of transformer

Abstract

The invention discloses an automatic stop device for vacuum oil filling of a transformer. The automatic stop device comprises a bracket, a first reed pipe, a first buoy, a second reed pipe, a second buoy and a flange disc, wherein the bracket is fixed at the lower part of the flange disc; the first reed pipe and the second reed pipe are respectively fixed on the bracket from top to bottom; the first buoy is positioned at the lower part of the first reed pipe and is hinged with the bracket; the second buoy is positioned at the lower part of the second reed pipe and is hinged with the bracket; and magnetic pieces are arranged on the first buoy and the second buoy. The automatic stop device is arranged at an opening of the top of the transformer, when the transformer is subjected to vacuum oil filling, an alarm is given according to the oil level so as to stop filling, the defect that the core of the transformer is affected by damp due to low oil level can be effectively prevented by using the device, and the service life of the transformer is prolonged; in addition, the phenomenon of oil leakage due to high oil level during oil filling can be avoided, the oil consumption of the transformer can be reduced, and the oil filling equipment is prevented from being damaged.

Description

technical field [0001] The invention relates to an electric device, in particular to an automatic stop device for vacuum oiling of a transformer used in the vacuum oiling process of a main transformer. Background technique [0002] Vacuum oiling of main transformer is one of the most critical procedures in transformer overhaul and infrastructure work, which directly affects the insulation performance of the transformer. When the main transformer is filled with vacuum oil, the maintenance personnel cannot observe the real oil level inside the transformer, and can only roughly estimate the oil filling position of the transformer based on the oil filling amount and the change of the vacuum gauge. There are often two situations, one is the oil filling level If it is too low, the body of the transformer is not completely immersed in the oil. After the vacuum is released, the air enters the oil tank, and the moisture enters the insulation layer to reduce the performance index of t...

AI Technical Summary

Problems solved by technology

When the main transformer is filled with vacuum oil, the maintenance personnel cannot observe the real oil level inside the transformer, and can only roughly estimate the oil filling position of the transformer based on the oil filling amount and the change of the vacuum gauge. Two situations often occur, one is the oil filling level If it is too low, the body of the transformer is not completely immersed in the oil. After the vacuum is released, the air enters the oil tank, and moisture enters the insulation layer to reduce the performance index of the transformer and pose a safety hazard; Moreover, the transformer oil enters the vacuum pump, causing unnecessary waste, and in severe cases, it will damage the vacuum pump.

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