A method for repairing the contact surface of electrical equipment joints

A repair method and technology for electrical equipment, applied in the direction of electrolytic paint, coating, etc., can solve problems such as poor contact on the joint surface, achieve the effects of improving point contact, maintaining long-term stability, and easy control of process conditions

Active Publication Date: 2022-03-15
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present application provides a method for repairing the contact surface of electrical equipment joints, which solves the problem of poor contact on the joint surface

Method used

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  • A method for repairing the contact surface of electrical equipment joints
  • A method for repairing the contact surface of electrical equipment joints
  • A method for repairing the contact surface of electrical equipment joints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Based on the repair method provided by this application, the silver coating is brushed, and the specific operation method is as follows:

[0039] (1) Polish the contact surface of the primary equipment joint to be treated on site, and clean the surface with water.

[0040] (2) Alkaline degreasing removes the oil stain on the surface of the contact surface before brushing, and the reagent formula for alkaline degreasing is:

[0041] NaOH 10g / L, NaOH 2 CO 3 50g / L and Na 3 PO 4 12H 2 O 50g / L, the solvent is water.

[0042] The temperature for alkaline degreasing is 70°C, and the soaking time is 5 minutes.

[0043] (3) The oil stain on the surface of the contact surface is treated by electro-cleaning until no water drops hang on the surface of the contact surface, and the wetting of water is good. The reagent formula for electro-cleaning treatment is as follows:

[0044] Na 3 PO 4 12H 2O 50g / L, NaOH 25g / L, NaOH 2 CO 3 20g / L and NaCl 3g / L, the solvent is water....

Embodiment 2

[0055] Based on the repair method provided by this application, the silver-graphite coating is brush-plated, and the specific operation method is as follows:

[0056] (1) Polish the contact surface of the primary equipment joint to be treated on site, and clean the surface with water.

[0057] (2) Alkaline degreasing removes the oil stain on the surface of the contact surface before brushing. The reagent formula for alkaline degreasing is as follows:

[0058] NaOH 10g / L, NaOH 2 CO 3 50g / L and Na 3 PO 4 12H 2 O 50g / L, the solvent is water.

[0059] The temperature for alkaline degreasing is 70°C, and the soaking time is 10 minutes.

[0060] (3) The oil stain on the surface of the contact surface is treated by electro-cleaning until no water droplets hang on the surface of the contact surface, and the wetting of water is good. The reagent formula for electro-cleaning treatment is: Na 3 PO 4 12H 2 O 50g / L, NaOH 25g / L, NaOH 2 CO 3 20g / L and NaCl 3g / L, the solvent is w...

Embodiment 3

[0070] Based on the repair method provided by this application, the silver-graphene coating is brush-plated, and the specific operation method is as follows:

[0071] (1) Polish the contact surface of the primary equipment joint to be treated on site, and clean the surface with water.

[0072] (2) Alkaline degreasing removes the oil stain on the surface of the contact surface before brushing. The reagent formula for alkaline degreasing is: NaOH 10g / L, NaOH 2 CO 3 50g / L and Na 3 PO 4 12H 2 O 50g / L, the solvent is water.

[0073] The temperature for alkaline degreasing is 70°C, and the soaking time is 10 minutes.

[0074] (3) The oil stain on the surface of the contact surface is treated by electro-cleaning until no water droplets hang on the surface of the contact surface, and the wetting of water is good. The reagent formula for electro-cleaning treatment is: Na 3 PO 4 12H 2 O 50g / L, NaOH 25g / L, NaOH 2 CO 3 20g / L and NaCl 3g / L, the solvent is water.

[0075] Conne...

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Abstract

This application belongs to the technical field of heat treatment of joints. The application provides a method for repairing the contact surface of electrical equipment joints. Brush-plating silver, silver-graphite or silver-graphene coatings based on the brush-plating method can effectively improve the point contact phenomenon of electrical connections, and the repaired coating has excellent The uniformity, adhesion, thickness, conductivity and wear resistance can maintain the long-term stability of contact resistance, effectively avoid the problem of abnormal heating caused by poor contact on the contact surface during operation, reduce contact resistance, and improve electrical equipment joints (fixed Joint) contact surface contact condition. The repair method of the present application solves the technical problems of uneven brush plating and difficulty in realizing the uniformity of the coating in the existing brush plating technology, which requires high hardness and wear resistance.

Description

technical field [0001] The application belongs to the technical field of heat treatment of joints, and in particular relates to a method for repairing contact surfaces of electrical equipment joints. Background technique [0002] The abnormal heating of the current-carrying conductor connector of the primary equipment of power transmission and transformation is a common and main defect type in the power system. The root cause of the heating of equipment joints is the increase of contact resistance, which is easy to form hot spots, and the heat will aggravate the oxidation of the conductor surface, making the contact resistance larger and the temperature of the contact surface higher and higher. In severe cases, the surface of the connecting fittings may have obvious Burning, deformation or even melting will bring great safety hazards to the operation of equipment. [0003] The treatment of abnormal heating defects of electrical primary equipment joints basically adopts the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/06C25D3/46C25D15/00C25D5/34C25D5/48
CPCC25D5/06C25D3/46C25D15/00C25D5/34C25D5/48
Inventor 吕旺燕李谦董重里赵耀洪
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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