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Bending process for insulating paper board of large scale power transformer

A technology of power transformers and insulating cardboard, applied in the field of transformers, can solve the problems of large size of insulating cardboard, inability to complete work, high cost, etc., and achieve the effect of less investment and easy operation

Inactive Publication Date: 2012-05-02
TIANWEI BAOBIAN QINHUANGDAO TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Normally, the insulating cardboard is bent on a special bending machine. However, when the size of some insulating cardboard to be bent is large, beyond the working range of the bending machine, the work cannot be completed. If the bending machine is modified, the Higher cost

Method used

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  • Bending process for insulating paper board of large scale power transformer
  • Bending process for insulating paper board of large scale power transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, an L-shaped bend is folded.

[0012] It includes the following process steps: ① Make a wooden bar with the same length as the bent insulating cardboard, chamfer the end of the wooden bar, and mark the bending line at the position where the insulating cardboard needs to be bent; ② Dip in distilled water with a brush to evenly Dip the brush at the bending line of the insulating cardboard with a width of 160mm; place it for 0.5 hours after brushing once, and then brush it with distilled water; ③Leave it for more than 0.5 hours to allow the distilled water to be absorbed evenly, check that both sides of the insulating cardboard absorb water evenly before bending ;④ Place the insulating cardboard on the level ground, align the chamfered edge of the wooden bar with the bending line and fix it with a cardan, fold up the insulating cardboard, and at the same time hit the outer insulating cardboard at the corresponding wooden bar with a wooden hammer to reduce the b...

Embodiment 2

[0013] Embodiment 2, folding out a Z-shaped bend.

[0014] If you need to make a Z-shaped bend, draw two parallel bending lines on the position where the insulation cardboard needs to be bent to mark it. After finishing the bending of the first bending line, set the shape for 10 minutes, and then complete the first bending line Bending, so that the insulating cardboard is in the bending state for more than 0.5 hours to finalize the shape, and complete the Z-shaped bending.

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Abstract

The invention relates to a bending process for insulating boards of a large-scale power transformer, and belongs to the technical field of transformers. The invention adopts the technical scheme as follows: a wooden bar which is the same with the insulating boards to be bent in length is made, the end part of the wooden bar is chamfered, and a bending line for marking is drawn in a bending positions of the insulating boards; a brush is used for dipping distilled water and uniformly brushing the bending lines of the insulating boards in an immersed manner, and the brush immersing width is 160 mm; after brushing, 0.5 hour of staying is carried out, and then the distilled water is coated in a brushed manner again; after more than 0.5 hours staying, distilled water is used for brushing again; after more than 0.5 hour of staying, the distilled water is enabled to be absorbed uniformly, and then the bending is performed after water on the two surfaces of each insulating board is uniformly absorbed; the insulating boards are placed on the level ground, the chamfered edge of the wooden bar is aligned with the bending line and fixed by a clamp, the insulating boards are bent, meanwhile a wooden mallet is used for beating an outer insulating board in a position corresponding to the wooden bar, the bending radius is reduced, and the bending is achieved. The invention has the positive results as follows: in case of the condition that the dimension of the insulating board extends out of the working range of the bending machine, the bending work can be accomplished, the production can not be influenced, the investment is less, and the operation is simple.

Description

technical field [0001] The invention relates to a large-scale power transformer insulating cardboard bending process, which belongs to the technical field of transformers. Background technique [0002] Part of the insulating cardboard used in large power transformers needs to be bent and formed, for example: folded into "L" and "Z" bends. Normally, the insulating cardboard is bent on a special bending machine. However, when the size of some insulating cardboard to be bent is large, beyond the working range of the bending machine, the work cannot be completed. If the bending machine is modified, the The cost is higher. Contents of the invention [0003] The purpose of the present invention is to provide a large-scale power transformer insulating cardboard bending process, when the size of the insulating cardboard exceeds the working range of the bending machine, the bending work can be completed, the investment is small, the operation is simple, and the above-mentioned pro...

Claims

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Application Information

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IPC IPC(8): B31F1/00
Inventor 姜泽吉程大鹏杨振彬李冀泽王彩娟
Owner TIANWEI BAOBIAN QINHUANGDAO TRANSFORMER