Coolant oil filtering device for small substation transformer

Abstract

The invention relates to a coolant oil filtering device for a small substation transformer, and discloses a device for filtering by matching turning-off according to height difference in multilayer filtering directions with discharge electrolysis of an electrified filter screen. The coolant oil filtering device is characterized in that a lower tank body is arranged on a base; a transparent cover is arranged on the base; a heating cavity is formed between the transparent cover and the left side wall of the lower tank body; the heating plate is arranged on the left side wall of the lower tank body and is arranged in the heating cavity; a plurality of heat dissipating wing plates are equidistantly arranged on the rear side wall of the lower tank body; a supporting frame is arranged at the topof the lower tank body and is connected with the transparent cover; a power roller is rotationally arranged on the supporting frame; a metal filter screen is arranged in the supporting frame, and oneside of the metal filter screen winds the power roller; carrier rollers are rotationally arranged on the supporting frame; the tops of the carrier rollers are connected with the metal filter screen;a fixed platform is arranged on one side of the supporting frame; a filter screen guiding groove is formed in the fixed platform; two driving rollers are respectively and rotationally arranged on thefixed platform and are separately located on two sides of the filter screen guiding groove.

Description

technical field [0001] The invention discloses a transformer cooling oil filtering device in a small substation, relates to a device for filtering cooling oil in a small transformer, and belongs to the field of electric power construction. In particular, it relates to a filtering device for cooling water molecules in oil through discharge electrolysis of a charged filter screen through multi-layer filtering. Background technique [0002] At present, in the daily overloading of small substations, the heat of the substation needs to be output and dissipated through the transformer oil. During the heat transfer process, the original moisture in the transformer is heated and volatilized, forming water vapor mixed in the cooling oil, and in the Under the action of the electric field and heat of the transformer, the cooling oil contacts with water vapor, and an oxidation reaction occurs. The products after the reaction combine to form insoluble colloids, and sludge precipitates ou...

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Problems solved by technology

[0002] At present, in the daily overloading of small substations, the heat of the substation needs to be output and dissipated through the transformer oil. During the heat transfer process, the original moisture in the transformer is heated and volatilized, forming water vapor mixed in the cooling oil, and in the Under the action of the electric field and heat of the transformer, the cooling oil contacts with water vapor, and an oxidation reaction occurs. The products after the reaction combine to form insoluble colloids, and sludge precipitates out and is mixed in the cooling oil, reducing the heat dissipation effect of the cooling oil. When filtering the cooling oil of a small substation, the sludge in the cooling oil can be filtered, but the water vapor mixed in the cooling oil cannot be filtered and separated, which affects the filtering effect

[0003] Publication No. CN105238542A discloses a filter device for transformer oil, which relates to a regenerative filter for transformer oil. An upper cover (2) is provided on the upper end of the tank body (3), and a moisture discharge valve (1 ), the upper and lower parts of one side of the tank are respectively provided with a floating discharge pipe (18) and a sediment discharge pipe (15), and the other side of the tank is respectively provided with a pressure injection port (5) and a filter pipe near the upper and lower parts (11), the filter tube is provided with a multilayer filter screen (8), the outer port of the filter tube is provided with a side cover (10), and the bottom of the side cover is provided with a valve (9); the heater (12 ) is arranged at the lower end of the tank body, and the heating tube (16) of the heater is in the cavity (4) in the tank body; in this method, after the sediment is filtered through the filter tube for multi-stage filtration, the filter residue is filtered in the filter tube , but after the filter tube is clogged, it needs to be replaced regularly. It is difficult to disassemble the filter tube, and it needs to be shut down for replacement. The filtration efficiency is low, and the water vapor inside cannot be filtered during filtration.

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