A kind of preparation method of grounding grid physical resistance reducing agent for alkaline soil

A technology of grounding grid and resistance reducing agent, applied in the fields of polymer chemistry and engineering materials, can solve the problems of easy loss, lack of stability and long-term effect, etc.

Inactive Publication Date: 2017-03-08
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conductive materials in the above patents are small molecular salts or water-soluble non-crosslinked polymers, which are easily lost when washed by rainwater during application, and are still insufficient in terms of stability and long-term performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] Weigh 1kg of acrylic acid, add 0.054kgl butyl acrylate, 0.021kg trimethylolpropane triacrylate, 0.001kg dibenzoyl peroxide and 0.5kg methyl ethyl ketone aqueous solution, after bubbling with high-purity nitrogen for 30min, at 60℃ Under the condition of reaction 5h. After the reaction is complete, add 0.5kg of graphite powder, 0.5kg of sodium bentonite, 0.01kg of sodium molybdate and 0.5kg of 20% sodium carbonate aqueous solution to the system, and stir evenly.

example 2

[0019] Weigh 1kg of acrylic acid, add 0.062kg of butyl acrylate, 0.025kg of trimethylolpropane triacrylate, 0.0015kg of methyl ethyl ketone peroxide and 0.6kg of methyl ethyl ketone aqueous solution, after bubbling with high-purity nitrogen for 30min, at 65°C Reaction 5h. After the reaction is complete, add 0.65 kg of graphite powder, 0.65 kg of sodium bentonite, 0.0125 kg of sodium dihydrogen phosphate and 0.7 kg of 20% sodium carbonate aqueous solution to the system, and stir evenly.

example 3

[0021] Weigh 1kg of acrylic acid, add 0.072kg of butyl acrylate, 0.03kg of trimethylolpropane triacrylate, 0.002kg of dibenzoyl peroxide and 0.8kg of butanone aqueous solution, bubble with high-purity nitrogen for 30min, Conditions of reaction 5h. After the reaction is complete, add 0.75kg of graphite powder, 0.75kg of sodium bentonite, 0.015kg of sodium molybdate, and 1.0kg of 20% sodium carbonate aqueous solution to the system, and stir evenly.

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Abstract

The invention relates to a preparation method of a physical drag-reducing agent for grounding grids used in alkaline soils. Acrylic acid, butyl acrylate and trimethylolpropane triacrylate are used as monomers to obtain slightly cross-linked polyacrylic acid- Acrylate copolymer, and then mixed evenly with graphite powder, carbon black or short carbon fiber conductive filler, bentonite to obtain a drag reducing agent. The physical resistance reducing agent for grounding grids of the invention has good stability and long-term effect, good diffusion and penetration performance, slow release effect on grounding materials, and great application value in substation grounding grids.

Description

technical field [0001] The invention discloses a preparation method of a physical resistance-reducing agent for grounding grids used in acidic soil, in particular to a physical resistance-reducing agent for grounding transmission and transformation substations and large-scale electrical equipment, and belongs to the technical field of polymer chemistry and engineering materials. Background technique [0002] The resistance reducing agent is a good conductor, mainly composed of graphite, bentonite, curing agent and other components, the main function is: (1) reduce the resistivity between the grounding body and the soil; (2) contact with the metal grounding body, Form a broad current flow surface; (3) The water retention and water absorption of the resistance reducing agent can improve and maintain the conductivity of the soil; (4) Reduce the contact resistance. [0003] In order to reduce the grounding resistance of power equipment and keep the grounding resistance of power ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00
Inventor 刘志雷查志强胡孝涛周建萍李多生刘光明
Owner NANCHANG HANGKONG UNIVERSITY
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