Round bend type transformer tank cover

Abstract

The invention discloses a round bend type transformer tank cover used for a transformer tank. The transformer tank cover covers the transformer tank and is a square cover plate. The four sides of the tank cover are all located on the outer side of the side wall of the transformer tank, downward round bend is conducted on the four edges of the tank cover to form four flanges, the bent portions, provided with the flanges, of the cover plate are all located on the outer side of the side wall of the transformer tank, the four flanges are welded to the outer side face of the tank cover and connected into a whole, and joints are eliminated. The flanges are formed through round bend, damage to a steel plate antirust layer is reduced, the bent flanges are reasonable in size, the flanges can well protect a sealing rubber strip, and therefore the strength of the cover plate can be improved.

Description

technical field [0001] The invention relates to the field of transformer manufacturing, in particular to a round corner bending type transformer box cover. Background technique [0002] The transformer is used for voltage conversion in power transmission and transformation projects. It is installed outdoors and has high-voltage devices inside, so good sealing is required. At present, the commonly used transformers in China generally use a whole piece of steel plate as the box cover, and the box cover extends 5mm from the box edge. , without special treatment, the cost of such a box cover is relatively low, but it is difficult to protect the sealing strip along the box. Since the transformer works outdoors, the sealing strip without protection is prone to aging under the irradiation of ultraviolet rays and rain , so that the sealing performance of the transformer is greatly reduced. Moreover, the steel plate is easily deformed without a welded reinforcing plate, which will...

AI Technical Summary

Problems solved by technology

[0002] The transformer is used for voltage conversion in power transmission and transformation projects. It is installed outdoors and has high-voltage devices inside, so good sealing is required. At present, the commonly used transformers in China generally use a whole piece of steel plate as the box cover, and the box cover extends 5mm from the box edge. , without special treatment, the cost of such a box cover is relatively low, but it is difficult to protect the sealing strip along the box. Since the transformer works outdoors, the sealing strip without protection is prone to aging under the irradiation of ultraviolet rays and rain , so that the sealing performance of the transformer is greatly reduced

And the steel plate is easy to deform without welding reinforcement plate, which will affect the mechanical strength and sealing performance of the transformer

[0003] At present, although some patents propose the technical scheme of forming the sidewall by bending process, although these schemes can strengthen the strength of the steel plate, they do not take into account the protection of the sealing strip and the anti-rust ability of the steel plate during the bending process. impact, which directly affects the effectiveness of these programs

[0004] The patent of Publication No. 103035367A discloses a cover plate of a distribution transformer. After the rib extends out from the edge by 60mm, it is bent at a right angle by 30mm to form the edge. The distance between the edge and the box wall is 30mm, and the 30mm Part of the cover plate is a horizontal plate, so that the translation space of the box cover is large during the installation process. When the box cover slips due to vibration or impact, the sealing strip is easily damaged; and the steel plate is bent. Plastic deformation will inevitably cause damage to the anti-rust layer of the steel plate, but in this scheme, there is a 30mm wide horizontal steel plate between the bent edge of the cover plate and the box wall, such a wide horizontal steel plate is easy to accumulate rainwater, and the anti-rust layer is bent and damaged In some cases, if there is no follow-up anti-rust treatment, this part of the horizontal steel plate will be easily corroded, which will affect the protection of the sealing strip and directly affect the strength of the cover plate

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