In recent years , through the main transformer and auxiliary transformer Oil Leak processing , continuous improvement , summarize prevention measures , transformer oil leakage rate is greatly reduced for the safe operation of the transformer to provide a guarantee for the enterprise , social, and users get economic efficiency.
1 , select the material good seals
Transformer maintenance and handling leakage should be selected high temperature, excellent oil resistant metal cable ties. Domestic transformer industry, the most commonly used seal material is nitrile rubber , oil resistance depends mainly on its acrylonitrile content of nitrile rubber , acrylonitrile content is higher, the better oil resistance , hardness , the more easily deformed. Generally Shore hardness should be selected between 70 to 80 nitrile rubber . Identification oil resistant gasket , the general aging test should be done and the gasket and compatibility testing of transformer oil , to be immersed in the hot oil 120 ℃ 168h, and measuring its weight , volume and rate of change of hardness , select its little deformation , standards-compliant security seal.
2, choose high-quality butterfly
Select ZF80 vacuum eccentric butterfly valve . Compared with the ordinary valve , vacuum butterfly valve in the mechanical strength , surface finish has been greatly improved, and that it also has one of the biggest advantage is that the transformer flange interface uses a double-sealed , so put an end to transformer oil leakage at the interface problem .
3 , the use of welding plugging
For the left to the transformer due to casting porosity, trachoma , weld , solder joint appearance of Weld , Desoldering , crack , the available welding for plugging. In the blocking should identify leaks before welding , smaller leaks will drain directly Welded little dead ; leak should be filled with the larger asbestos rope or metal filler , and then surfacing in four weeks , and then using a small electrode high-current fast arc welding .
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