Graphite composite grounding protection material and preparation method thereof

A technology of composite grounding and protective materials, applied in the direction of connecting contact materials, connections, line/collector components, etc., can solve the problems of grounding metal surface corrosion, affecting the effect of grounding grid grounding resistance reduction, and being easily corroded, etc., to achieve Stable in nature, prolonging the effect of resistance reduction protection, and the effect of not easy to lose

Active Publication Date: 2017-10-20
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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AI Technical Summary

Problems solved by technology

The service life of the grounding grid is generally expected to be 20 to 30 years at the beginning of the grounding grid. However, after 3 to 5 years of operation of some low carbon steel grounding bodies, some grounding metals have undergone serious surface corrosion, and the carbon steel has basically been corroded in 8 to 10 years. 1 / 3, the local corrosion is serious, and it cannot bear the electric power of the impact current at all, so that the grounding grid and even the power grid face a great probability of operational failure and personal safety risks of the staff
In addition to the metal grounding body being easily corroded, other non-metallic grounding materials such as graphite grounding modules, flexible graphite composite grounding bodies, etc. also have corrosion problems in the metal connectors at the interconnection, which affects the grounding resistance reduction effect of the entire grounding network

Method used

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  • Graphite composite grounding protection material and preparation method thereof

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Effect test

Embodiment 1

[0021] A preparation method of a graphite composite grounding protection material in this embodiment (the schematic diagram of the preparation process is as follows figure 1 Shown): Add 40% flake graphite and 50% dry cement powder in deionized water, add water and stir evenly, then add 5% asphalt and 5% epoxy resin and mix evenly to obtain graphite composite ground protection material.

[0022] The material is evenly coated on the outer surface of the graphite composite grounding body or the metal connector to form a protective coating, and the resistivity of the material is about 1.9Ωm after curing.

Embodiment 2

[0024] The preparation method of a graphite composite grounding protection material in this embodiment: Add flake graphite with a volume fraction of 70% and 25% cement dry powder in deionized water, add water and stir evenly, then add 2% asphalt and 3% epoxy resin After uniform mixing, the graphite composite grounding protection material is obtained.

[0025] The material is evenly coated on the outer surface of the graphite composite grounding body or the metal connector to form a protective coating, and the resistivity of the material is about 0.1Ωm after curing.

Embodiment 3

[0027] The preparation method of a graphite composite ground protection material in this embodiment: add flake graphite with a volume fraction of 50% and cement dry powder with a volume fraction of 45% in deionized water, add water and stir evenly, then add 3% asphalt and 2% epoxy resin After uniform mixing, the graphite composite grounding protection material is obtained.

[0028] The material is evenly coated on the outer surface of the graphite composite grounding body or the metal connecting piece to form a protective coating, and the resistivity of the material is about 0.3Ωm after curing.

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Abstract

The invention discloses a graphite composite grounding protection material and a preparation method thereof. The graphite composite grounding protection material comprises, by volume, the following raw materials including crystalline flake graphite 40%-70%, cement 25%-55%, asphalt 2%-5% and epoxy resin 2%-5%. The graphite composite grounding protection material is applied to metal connecting parts of a metal grounding body and a non-metal grounding body and can effectively protect metal against corrosion, accordingly the stability of a grounding system is greatly improved, the service life of the grounding system is prolonged, and the maintenance cost of a production operation unit is reduced.

Description

technical field [0001] The invention relates to the technical field of lightning protection and grounding of electric power systems, in particular to a graphite composite grounding protection material and a preparation method thereof. Background technique [0002] With the development of the power grid, the construction of various power facilities is increasing year by year, especially in recent years, with the development of UHV transmission projects, large-scale cross-regional transmission lines are becoming wider and wider. Our country has a large area and complex and changeable terrain. There are many dense lightning strike areas in the territory, especially in the southern region. Lightning strike is a relatively serious natural disaster, and the lightning protection grounding of transmission lines is directly related to the safety and stability of the power system. [0003] At present, the main measures taken for lightning shielding of transmission lines include enhan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R4/66H01R43/00
CPCH01R4/66H01R43/00
Inventor 肖微张思寒詹清华黄松波黄道春
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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