Main transformer insulation paper vacuum sampling device and implementation method of vacuum sampling

Abstract

The invention relates to a main transformer insulation paper vacuum sampling device, comprising a rotary sampling barrel; a ring-shaped cutting edge is arranged on the head of the rotary sampling barrel; the tail part of the rotary sampling barrel is connected with the outer ring of a sealed bearing, and the inner ring of the sealed bearing is connected with one end of a connecting pipe; the other end of the connecting pipe is connected with an air exhaust hole of a vacuum pump; the rotary sampling barrel is communicated with the interior of the connecting pipe; the connecting pipe is provided with a button used for breaking the air tightness of the connecting pipe. The main transformer insulation paper vacuum sampling device can be used for effectively and normatively sampling insulation paper which is used for fixing, binding and winding main transformer windings and leads in a main transformer.

Description

technical field [0001] The invention relates to a vacuum sampling device for insulating paper of a main transformer and an implementation method thereof. Background technique [0002] The windings and lead wires of various voltage levels installed on the iron core in the main transformer are protected and insulated from each other by insulating paper dipped in insulating oil and wrapped. The quality of the insulating paper is one of the most important factors to ensure the safe operation of the main transformer. The quality of the paper is the shortcoming of all the materials of the main transformer, and the operating life of the main transformer mainly depends on the acid value and degree of polymerization of the insulating paper inside. The main component of insulating paper is cellulose. During the long-term operation of the transformer, cellulose will undergo high-temperature degradation, oxidative decomposition, and acid-catalyzed hydrolysis to produce small molecular a...

AI Technical Summary

Problems solved by technology

[0003] The traditional sampling method for the insulation paper of the main transformer is to use manual hand-held paper cutters, scissors or other non-standard tools to cut, cut, and dig the parts to be sampled. The pattern of the insulating paper is irregular, resulting in waste, and it is very easy to damage the insulating paper around the sample and the lower layer. In severe cases, it may cause insulation damage to the main transformer winding and high-voltage lead wires, burying hidden dangers during the operation of the main transformer power transmission. Therefore, there is an urgent need for a sampling device and method that can standardize and non-destructively sample the surrounding insulating paper, and standardize the sampling of the insulating paper of the main transformer to ensure the safe operation of the main transformer

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