Low temperature rubber capsule used in oil conservator for transformer and preparation process

Abstract

The invention provides a low temperature rubber capsule used in an oil conservator for a transformer and a preparation process. The invention is characterized in that: the fabric, nylon silk 525, is used as a framework material of the low temperature rubber capsule, and the surface of the nylon silk 525 is coated with a sizing material which has good oil resistance, heat resistance and cold resistance and comprises butyronityile-26, butyronityile-18, a strengthening agent and a plasticizer; the preparation process comprises a step of filtering slurry of the sizing material with a 100-mesh screen and applying the sizing material on each surface of the nylon silk 525 at least three times, a step of calendering an obtained rubberized fabric by using a pressure rubberizing method and carrying out double-surface rubberizing on the rubberized fabric with a three-roll calender after rubber coating, a step of severing and molding the calendered rubberized fabric according to requirements of a drawing, a step of spreading talcum powder on the surface of formed capsules and putting the capsules into a vulcanizing tank for vulcanization and a step of carrying out visual and dimensional inspection and pressure test on the vulcanized capsules, packaging qualified capsules and putting the packaged qualified capsules in a warehouse. According to the invention, the problem that conventional rubber capsules used in an oil conservator for a transformer can not be normally used under a low temperature of -60 DEG C is thoroughly overcome.

Description

technical field [0001] The present invention relates to a transformer accessory and its preparation process, in particular to a transformer oil conservator low-temperature capsule and its preparation process, which is an improvement on the low-temperature resistance performance of the existing transformer oil conservator capsule to adapt to the normal use of transformers in cold regions . It belongs to the transformer manufacturing technology. Background technique [0002] The transformer oil conservator capsule is a supporting product of the transformer and a rubber accessory to prevent the oil quality of the transformer from deteriorating. [0003] The existing transformer oil conservator capsule is made of high-strength adhesive tape with excellent oil resistance. It is placed in the transformer oil and floats up and down with the change of oil level to prevent water and oxygen from invading the oil surface, prevent oil quality from deteriorating, and prolong the service...

AI Technical Summary

Problems solved by technology

The invention adopts a rubber formula with excellent low-temperature performance, and its brittleness temperature is lower than -60°C, which completely solves the problem that the capsule of the transformer oil conservator cannot be used normally at a low temperature of -60°C, so that it can still prevent transformer oil The effect of quality deterioration

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