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Once seal-exhaust method of vacuum explosion chamber

A vacuum interrupter and contact technology, applied to electrical components, electrical switches, circuits, etc., can solve problems affecting product performance, improve welding reliability, reduce deformation and weld width

Inactive Publication Date: 2016-05-18
TIANJIN PINGGAO INTELLIGENT ELECTRIC +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the complete sealing process, a piece of solder is usually sandwiched between the moving contact piece and the moving contact rod, and then suspended welding is performed after riveting, so that after riveting, the contact piece and the contact rod are riveted at room temperature. Tight, but at high temperature during soldering, due to thermal expansion, there will be a gap between the solder sheet and the contact rod, and between the solder sheet and the contact sheet, so that there are two gaps between the contact rod and the contact sheet. strip gap, affecting the performance of the product

Method used

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  • Once seal-exhaust method of vacuum explosion chamber

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Embodiment Construction

[0024] The embodiment of the one-time sealing method of vacuum interrupter among the present invention: as figure 1 shown, including the following steps:

[0025] Step 1, cleaning the contact rod;

[0026] Step 2, carrying out silver-plating treatment on the welding surface of the contact rod for welding with the contact piece;

[0027] Step 3: Assemble the contact rod and the contact piece together, and then assemble with other parts to form a complete arc extinguishing chamber, and then perform a sealing operation.

[0028] Wherein step a kind of cleaning procedure is:

[0029] 1) Use an organic solvent (tetrachloroethylene) to pre-degrease the contact rod;

[0030] 2) Carry out chemical degreasing to the contact rod with alkaline solution;

[0031] 3) Pickling the contact rod with a mixed solution of sulfuric acid and nitric acid (volume ratio 2:3);

[0032] 4) Carry out bright pickling to the contact rod with nitric acid;

[0033] 5) The contact rod is dehydrated wit...

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Abstract

The invention discloses a once seal-exhaust method of a vacuum explosion chamber, comprising the steps of: first, cleaning a contact rod; second, performing silver plating processing on the welding surface of the contact rod used for welding with a contact blade; and third, assembling the contact rod and the contact blade to perform once seal-exhaust. The method performs silver plating on the welding surface of the contact rod, and substitutes a silver plating layer on the welding surface for a traditional welding sheet, allowing only one gap between the contact blade and the contact rod in a once seal-exhaust process, thereby reducing the thermal expansion deformation of the contact blade and the contact rod, and the width of the gap, and improving the welding reliability of the contact blade and the contact rod.

Description

technical field [0001] The invention relates to a primary sealing and exhausting method of a vacuum interrupter. Background technique [0002] At present, in the one-time sealing process of the vacuum interrupter, in order to ensure the welding quality of the contact piece and the contact rod, the contact piece and the contact rod are usually pre-welded once in the vacuum furnace, and then the remaining parts are Assemble with the pre-welded parts and put it into a vacuum furnace for a sealing. The complete one-time sealing of the vacuum interrupter is to directly assemble all the parts of the vacuum interrupter into a whole, and then complete the process of exhausting, baking, and brazing and sealing in a vacuum furnace at one time. In the complete sealing process, a piece of solder is usually sandwiched between the moving contact piece and the moving contact rod, and then suspended welding is performed after riveting, so that after riveting, the contact piece and the cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/06
CPCH01H11/06
Inventor 施大成陈飞李正刘晶晶王晓琴唐先贺陈亚鹏赵志维周广伟陈海军
Owner TIANJIN PINGGAO INTELLIGENT ELECTRIC
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