High-potential isolation transformer oil tank

Abstract

The invention relates to a high-potential isolation transformer oil tank, which is characterized by comprising a high-pressure epoxy barrel, wherein the upper end of the high-pressure epoxy barrel is provided with an upper cover plate; the lower end of the high-pressure epoxy barrel is connected with a base; the side face of the base is provided with a primary lead frame; an isolation transformer is arranged on the base; the inner side of the upper cover plate is provided with a high-pressure insulator; the installation end of the high-pressure insulator extends out of the outer side of the upper cover plate; and a high-pressure lead-out protective sleeve is sleeved on the high-pressure insulator on the outer side of the upper cover plate. In the oil tank disclosed by the invention, the high-pressure epoxy barrel is taken as a tank body, so that the oil tank is firm and hermetic and is prevented from being deformed easily; the oil tank is made of a high-pressure insulating material, so that the distance required by pressurization can be reduced, the problem of fire striking between high pressure and a tank wall does not exist, and the size of the oil tank is reduced greatly; moreover, the oil tank is convenient to process, and cost is saved; and the oil tank has a compact structure and high integration degree, is convenient to install and hoist, and is firm.

Description

technical field [0001] The invention relates to a transformer oil tank, in particular to a high potential isolation transformer oil tank for DC 250kV. Background technique [0002] Traditional transformer oil tanks generally use iron oil tanks. Due to the pressure-resistant distance between the high-voltage part of the transformer and the tank wall, it is often only possible to solve the problem by enlarging the tank body, which cannot meet customer requirements, and the processing is complicated and difficult to seal. The problem is often caused by weld cracking or thermal expansion and contraction, resulting in oil leakage in the fuel tank, and the cost is also high. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a high potential isolation transformer oil tank with small volume and good voltage resistance. [0004] According to the technical solution provided by the present invention, ...

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Problems solved by technology

[0002] Traditional transformer oil tanks generally use iron oil tanks. Due to the pressure-resistant distance between the high-voltage part of the transformer and the tank wall, it is often only possible to solve the problem by enlarging the tank body, which cannot meet customer requirements, and the processing is complicated and difficult to seal. The problem; often due to weak welding of welds or thermal expansion and contraction caused weld cracking, resulting in oil leakage in the fuel tank, and the cost is also high

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