Container for material and oil compatibility tests

Abstract

A container for material and oil compatibility tests comprises a main body, a front close cover, a rear close cover and three or four guide bars each possessing screw threads at two ends; the main body consists of a bellows, and a front flange disc and a rear flange cover respectively welded at the front end and the rear end of the bellows; the front close cover covers a front flange and is connected with the front flange disc via bolts; the rear close cover covers a rear flange; each guide bar penetrates the front close cover, the front flange disc, the rear flange disc and the rear close cover; the positions of each guide bar, which are at the front side of the front close cover and at the rear side of the front flange disc, are respectively provided with a front spacing nut and a rear spacing nut, and the distance between the front spacing nut and the rear spacing nut is larger than the thickness of the front close cover and the front flange disc; the positions of each guide bar, which are at the front side of the rear flange disc and the rear side of the rear close cover, are respectively provided with a front locking nut and a rear locking nut, and the front locking nut and the rear locking nut fixes the corresponding guide bar, the rear flange disc and the rear close cover together; and the rear close cover is provided with two through holes respectively for oiling and vacuum pumping, and the through holes are connected with gate valves. The container for the material and oil compatibility tests is capable of effectively isolating air and compensating the volume needed by oil thermal expansion.

Description

technical field [0001] The present invention relates to materials and containers for oil compatibility tests. Background technique [0002] In the manufacture of transformers, all materials used in the oil tank need to be tested for compatibility with transformer oil. At present, the container used in the compatibility test is a jar, which is filled with transformer oil, and the material is placed in the jar, and the jar is placed in a drying oven at a temperature of 140° for a long time. Up to three months to carry out the determination of relevant parameters. During the test, the transformer oil should not have any contact with the outside atmosphere. Once in contact, it is impossible to correctly judge whether the test results meet the requirements. Therefore, the air must be isolated during the entire test process, but the jar cannot be sealed, nor can it be sealed. Transformer oil has a thermal expansion problem. The drying box cannot completely isolate the air. Alth...

AI Technical Summary

Problems solved by technology

During the test, the transformer oil should not have any contact with the outside atmosphere. Once in contact, it is impossible to correctly judge whether the test results meet the requirements. Therefore, the air must be isolated during the entire test process, but the jar cannot be sealed, nor can it be sealed. Transformer oil has a thermal expansion problem

The drying box cannot completely isolate the air. Although the drying box is vacuumed at present, it is still inevitable that the transformer oil will react with oxygen and water vapor during the heating process, resulting in inaccurate parameter determination and affecting the reliability of the test results. sex

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