Oil replenishing device and oil replenishing method for fully sealed oil-immersed transformer

Abstract

The invention discloses an oil replenishing device and an oil replenishing method for a fully sealed oil-immersed transformer. A sealed conical refueling funnel assembly (3); the conical refueling funnel assembly (3) is provided with a refueling port (301); the conical refueling funnel assembly (3) is provided with an oil filling pipe (2) Adjust the oil level inside to the target oil level and drain the excess oil from the oil injection pipe (2) to the overflow device in the oil recovery device (6) provided on the fully sealed oil-immersed transformer (1). The invention has the advantages of being able to accurately adjust the oil level in the oil injection pipe to the target oil level, and at the same time, it will not cause overflow due to excessive oil level and dirty the transformer box cover.

Description

technical field [0001] The invention relates to an oil replenishing device and an oil replenishing method for a fully sealed oil-immersed transformer. Background technique [0002] At present, the fully sealed oil-immersed transformer basically adopts the vacuum oiling process. In order to prevent overflow due to overfilling of the oil in the vacuum chamber, the height of the oil level of the oil filling generally does not exceed the height of the box cover, but the oil filling pipe 2 of the fully sealed oil-immersed transformer The oil level height h2 must be higher than the height h1 of the high-voltage porcelain sleeve 7 of the fully sealed oil-immersed transformer 1 (as shown in the attached figure 1 shown), otherwise the transformer may flashover during operation due to lack of oil in the high-voltage bushing 7; The oil filling operation is carried out at atmospheric pressure. [0003] The current method of replenishing oil: as attached figure 1 As shown, insert a co...

AI Technical Summary

Problems solved by technology

[0003] The current method of replenishing oil: as attached figure 1 As shown, insert a conical funnel into the upper opening of the oil injection pipe 2, and use an oil pot to add oil slowly into the funnel (speeding up will affect the air overflow or excessive overflow). It is impossible to see clearly the oil level in the oil injection pipe. Even the oil injection pipe 2 with a window must be careful, often causing the target oil level to not be added or the oil level to be too much (beyond the target oil level) and overflow (the target oil level is The height of the oil level in the oil filling pipe that we actually want), so that oil is all on the tank cover 8

Secondly, there is also the disadvantage that there will inevitably be air bubbles when refueling under atmospheric pressure, and it will take a long time for the air bubbles to be discharged. Insufficient, resulting in low efficiency, time-consuming and labor-intensive oil replenishment operation

Images