High-voltage winding middle inlet wire structure K wire lead cold pressing technology

A high-voltage winding and K-line technology, applied in coil manufacturing, cable joints, connections where permanent deformation works, etc., can solve problems such as many shortcomings and difficulties, and achieve the goal of reducing labor intensity, improving product quality, and eliminating potential safety hazards. Effect

Inactive Publication Date: 2014-01-22
洛阳华明变压器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned K-line connection using flame welding has many shortcomings and great difficulty, the technical solution proposed by the p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0007] 1. Process of K-line connection: selection of connecting pipe → modification of connecting pipe → cable pretreatment → cold crimping.

[0008] 2. Method of connecting K-line: (1) Select the connection pipe model according to the section of the K-line. The sum of the cross-sections of the two cables is equal to the sum of the cross-sections in the connection pipe to ensure matching.

[0009] (2) Ensure that the upper and lower K wires that need to be crimped can pass through the connecting pipe at the same time, and the crimped joints are treated before insulation wrapping. First, wrap the joints in an olive shape with aluminum foil, and then wrap them with metal wrinkles. , In order to ensure that the electrode shape at the crimp is uniform and the contact resistivity is the smallest.

[0010] (3) Treat the connecting pipe: pour both ends of the connecting pipe into rounded corners to make the ends of the crimping hemispherical to avoid sharp corners; remove the limit in the ...

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PUM

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Abstract

The invention discloses a high-voltage winding middle inlet wire structure K wire lead cold pressing technology. To solve the problems that many defects exist and difficulty is large when a K wire is connected through flame welding, the technical scheme is put forward. According to the technical scheme, the technology adopted to connect the K wire comprises the steps of selecting a connecting pipe, improving the connecting pipe, preprocessing a cable and carrying out cold welding. By means of the technology, the connecting effect is good, the processing time is shortened, product quality is improved, the potential safety hazards brought by the defects of the original technology are eliminated, and meanwhile labor intensity is reduced.

Description

technical field [0001] The invention relates to the field of construction, in particular to a cold-pressing process for K-wire lead wires of a high-voltage winding central wire-entry structure. Background technique [0002] Nowadays, the high-voltage lead wire in the lead wire manufacturing adopts the cold pressure welding process, in which the winding head and the lead wire use double-head cold pressure welding, and the lead wire and the tap changer use single-head cold pressure welding. However, the high-voltage winding is an on-load tap-changing transformer with a middle incoming line, and the connection of its K line is still to be welded by flame. [0003] The disadvantages of flame welding K wire are: (1) Copper is a metal and a good conductor of heat, so the turn insulation near the winding head will inevitably be damaged during welding, and the turn insulation damage at the upper and lower ends of the winding will still be damaged. May damage main insulation. (2) W...

Claims

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Application Information

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IPC IPC(8): H01F41/10H01R4/18H02G15/18
Inventor 郭克磊范新跃
Owner 洛阳华明变压器有限公司
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