Oil tank structure of oil-immersed transformer

Abstract

The invention discloses an oil tank structure of an oil-immersed transformer. The oil tank structure comprises an upper flange, a corrugated radiating fin, a box bottom, an arc-shaped plate, supports and an oil outlet nozzle, wherein connection corners of a box body have rounded-corner rectangular box body structures. The oil tank structure has the beneficial effects that both the upper flange and the box bottom are molded by stamping at a time, and the oil tank is in rounded-corner transition, so that oil in an oil tank can flow circularly better, and heat dissipation and cooling of the transformer are facilitated. The corrugated radiating fin is encircled as a whole, and radiating fins are arranged additionally on transition rounded corners on four sides, so that the welding workload is lowered; the heat dissipation rea is increased; the heat dissipation efficiency is increased; and the service life of the transformer is prolonged. The arc-shaped plate is circular-arc-shaped, so that the inner space of the oil tank is not occupied, and mounting and placement of other devices are facilitated. The bottom is in rounded-corner transition, and the oil outlet nozzle is arranged on a bottom surface of the box bottom, so that complete discharge of insulating oil and residues is facilitated; the overhauling workload is reduced; and the running safety of the transformer is ensured. The oil tank structure has a simple structure and high reliability; the production efficiency is increased; and the product quality is improved.

Description

technical field [0001] The invention belongs to an oil-immersed distribution transformer, in particular to an oil tank structure of an oil-immersed distribution transformer. Background technique [0002] The oil tank structure of the existing oil-immersed distribution transformer is composed of oil outlet nozzle, foot pad, box bottom, corrugated heat sink, and upper flange welding. The box body is a rectangular box structure; the upper flange is composed of angle steel and round steel welding. It is composed of steel plate and angle steel welded. The corrugated heat sink is divided into four pieces and welded between the upper flange and the bottom of the box. The heat sink and the heat sink are connected at right angles. The eight corners of the bottom of the box are all right angles, and the four corners of the upper flange are all right angles. The four corners of the box are lined with angle steel to strengthen the connection between the bottom of the box and the upper f...

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Problems solved by technology

[0003] The problem of this kind of fuel tank structure is: due to the large-area welding of the fuel tank as a whole, it is easy to produce welding defects such as deformation and virtual welding, and when polishing is performed after welding, cracks are prone to occur, resulting in oil leakage and oil seepage of the fuel tank. When oil leakage or oil leakage occurs in the transformer in operation, due to the existence of oil, repeated welding cannot be performed, which brings safety hazards to the product and increases the difficulty of product repair; the overall heat dissipation area of ​​the oil tank is small, which affects the heat dissipation of the transformer oil Effect; due to the right-angle structure at the bottom of the box, and the oil nozzle is set on the side of the bottom of the box, it is very difficult to remove the insulating oil and residue, which brings hidden dangers to the safe operation of the transformer; Beautiful, reduces production efficiency and affects product quality

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