A kind of insulating oil automatic filtering system and filtering method thereof

Abstract

The invention discloses an automatic insulating oil filtering system and a filtering method thereof. The system comprises a gas channel unit, an oil channel unit, an oil barrel and a control unit, wherein the gas channel unit and the oil channel unit are respectively connected with the oil barrel, the gas channel unit comprises an oil-gas separator, a vacuum pump and an air compressor, one end of the oil-gas separator is connected with a gas channel flexible pipe through a gas channel joint, the other end of the oil-gas separator is respectively connected with the vacuum pump and the air compressor through a gas channel T-junction, the oil channel unit comprises a fine filter, one end of the fine filter is connected with a first oil channel flexible pipe, the other end of the fine filter is sequentially connected with an oil feeding device through a first oil channel solenoid valve, a first check valve, an oil channel joint and a second oil channel flexible pipe, and a group of valve switches is connected between the front and rear oil channel joints of the oil channel unit through a T-junction. The automatic insulating oil filtering system can effectively avoid secondary pollution to insulating oil in the oil filtering process.

Description

technical field [0001] The invention relates to an insulating oil automatic filtering system and a filtering method thereof, belonging to the technical field of electric oil filtering. Background technique [0002] At present, due to the increasing number of oil-filled power equipment in the power system, it needs regular overhaul and maintenance. During the overhaul and maintenance process, it is necessary to filter the insulating oil of some oil-filled equipment. This kind of work requires high technology, and the commonly used oil filtering devices on the market generally have some congenital defects. It will more or less cause secondary pollution to the insulating oil. The specific reason is: the commonly used oil filter devices generally use mechanical pumps such as gear pumps as the oil delivery device. Friction, and then scrape off the metal powder. Although these metal powders are very small, they are usually on the micron scale. Conventional oil filter elements ca...

AI Technical Summary

Problems solved by technology

During the overhaul and maintenance process, it is necessary to filter the insulating oil of some oil-filled equipment. This kind of work requires high technology, and the commonly used oil filtering devices on the market generally have some congenital defects. More or less will cause secondary pollution to insulating oil

The specific reason is: the commonly used oil filter devices generally use mechanical pumps such as gear pumps as the oil delivery device. Friction, and then scrape off the metal powder. Although these metal powders are very small, they are usually on the micron scale. Conventional oil filter elements cannot be filtered out, so they are easily suspended in the insulating oil. Dielectric strength has a clearly negative effect

On the other hand, the speed of the gear pump is very high (usually 2400 rpm ~ 3600 rpm), once the friction in the pump chamber occurs, it will locally generate an instantaneous or even a long time high temperature (greater than 120 ° C), while the insulation Under such a high temperature, the oil is prone to cracking and aging, producing trace gases such as acetylene, which also has a negative impact on the electrical insulation strength of the insulating oil, and more importantly, has a great impact on the oil chromatographic failure analysis of oil-filled electrical equipment in the future. interference

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