On-line oil filter device of on-load tap-changer

Abstract

The invention discloses an on-line oil filter device of an on-load tap-changer. Parts of a three-phase motor, an oil pump, an oil inlet and outlet joint, a filter element, and the like are inserted and connected onto a precise alloy valve block which is internally provided with an integral oil way in an embedded mode; an overflow valve and a vacuum pressure sensor form a dual protection structurefor the whole oil way; a gas relief joint, a gas relief valve and an on-line oil filling valve are inserted on the precise alloy valve block and communicated with the interior oil way; oil sampling valves and viewing windows are arranged beside both a decontamination filter element and a dewatering filter element; an embedded high-performance special digital controller comprises a liquid crystal display and a Chinese menu and is provided with frequently-used functional keys and a simple and visual human-computer interface; and the on-line oil filter device is also provided with a heating temperature setting knob, a radiating temperature setting knob, a heater and a radiator. The invention effectively reduces sealing parts, improves the protection function under the conditions of faults and misoperations, realizes the functions of on-line gas relief and oil filling, is convenient for sampling and observing insulating oil and has good maneuverability and strong adaptive capacity to temperature environment factors.

Description

technical field [0001] The invention relates to an oil filter device, in particular to an on-line oil filter device for an on-load tap changer. Background technique [0002] The on-load tap-changer of the transformer produces impurities such as free carbon and metal particles due to frequent switching, thereby reducing the dielectric strength of the switch oil. The on-line oil filter device for on-load tap-changers is mainly used for circulating filtration of insulating oil in on-load tap-changers. It can effectively remove free carbon and metal particles in the oil in the tap-changer under normal operation of the transformer system and reduce A small amount of moisture ensures the breakdown voltage and service life of the oil, effectively improving the safety and reliability of the on-load tap-changer, thereby reducing the number of power outage maintenance and prolonging the maintenance cycle. [0003] Although the existing on-line oil filter devices for on-load tap-chang...

AI Technical Summary

Problems solved by technology

[0003] Although the existing on-line oil filter devices for on-load tap-changers can meet the above basic functions, there are still problems that most of the internal components of the device are connected by pipelines, and it is difficult to seal the pipe joints; when the pressure in the internal oil circuit of the device is abnormal, the pressure Insufficient protection and processing capacity, misuse may easily cause device damage; no friendly human-machine interface, low intelligence, poor adjustability; insulating oil sampling and observation remain unchanged; no defects such as gas online gas release structure and online oil injection structure

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