Technological method for replacing inner ground screen of transformer and special circle supporting tool

Abstract

The invention relates to a technological method for replacing an inner ground screen of a transformer and a special circle supporting tool. The technological method comprises the steps that firstly, the inner ground screen and supporting strips between adjacent first-layer paper tubes are fixed together; the inner ground screen and the supporting strips are lifted out at the same time, and a plurality of circle supporting tools are placed in the lifting-out process to completely and tightly support insulation between the inner ground screen and an inner coil; lines are directly drawn on the new inner ground screen for marking, and the lifted-out supporting strips are taken down, thinned and re-adhered to the new inner ground screen; the surfaces of the supporting strips are uniformly waxed, and the inner ground screen is assembled by using a travelling crane to be matched with an inner ground screen hoisting tool; a guide sheet is introduced, and the placed-in circle supporting tools are gradually dismounted in the falling process of the inner ground screen; and finally, by adopting a cross symmetry mode, a new 1mm supporting strip is driven into the space between the inner groundscreen and the supporting strips, and replacement of the inner ground screen is completed. The coil assembly does not need to be disassembled, the inner ground screen is rapidly replaced, and the production period is 3-4 days; the insulating part is not damaged, the insulating part does not need to be purchased again, and extra material cost is avoided; and only three to four persons are needed for operation, so the number of operators is small.

Description

technical field [0001] The invention belongs to the technical field of transformer production and manufacturing, and specifically relates to a process method and a special round support tool for replacing the inner screen of a transformer. The method and the special round support tool can be applied to all transformers to replace the inner screen or cardboard tube. Background technique [0002] In the manufacturing process of transformers, the transformer coils are assembled as a whole set, the inner screen is at the innermost side of the coil group, and there are surrounding screens and braces between the inner screen and the inner coil, which cannot be removed and replaced directly. [0003] For example, when the body of a certain transformer is assembled, once the inner screen paper tube is found to be deformed, in order to ensure product quality, the inner screen needs to be replaced. The current traditional process method is to disassemble the transformer coil group as ...

AI Technical Summary

Problems solved by technology

It takes about 30 days to disassemble and reassemble the coil group, which greatly affects the production progress of the transformer; moreover, because some insulating parts are fixed with glue, the insulating parts are easily damaged and cannot be reused when they are removed. Additional material costs will be generated, resulting in cost waste

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