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Grounding diversion concrete structure

A technology of diversion layer and metal grounding, which is applied in the direction of connection, connection contact materials, and parts of connection devices, etc. It can solve the problems of grounding body corrosion resistance and ground potential hazards, waste of non-ferrous metal resources, and difficulty in reducing resistance. , to achieve the effects of alleviating the hazards of rising ground potential, alleviating the hazards of high ground potential, and increasing the diffusion area

Active Publication Date: 2022-05-31
黄冈强源电力设计有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007]2. Difficult to reduce resistance in areas with high soil resistivity
The result of using a drag reducer is only a virtual phenomenon of lower ground resistance in a localized area
[0009]3. Corrosion resistance of grounding body and hazard of ground potential rise
[0013] According to the current grounding formula, the reduction of grounding resistance and inductance has nothing to do with the material of the metal grounding body, but only with the grounding body structure and soil resistivity. Currently, copper grounding is used The effect of volumetric resistance reduction is limited and there is a problem of electrochemical corrosion, while wasting precious non-ferrous metal resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1, in the area of ​​500Ωm<soil resistivity<1500Ωm, the grounding diversion anti-corrosion concrete powder includes the following raw materials by weight: 10 parts of ferrophosphorus powder, 0.5 parts of neodymium oxide, 1.5 parts of hydrophobic powder, and iron ore tailing powder 12 parts, 52 parts of graphite powder, 18 parts of bentonite, 3 parts of calcium carbonate and 3 parts of calcium sulfate;

Embodiment 2

[0065] Example 2, in the drier areas of the northern plateau with soil resistivity >1500Ωm, the grounding diversion anticorrosion concrete powder includes the following raw materials by weight: 11 parts of ferrophosphorus powder, 0.2 parts of neodymium oxide, 1.6 parts of hydrophobic powder, and iron ore tailing powder 13 parts of raw materials, 50 parts of graphite powder, 20 parts of bentonite, 3 parts of calcium carbonate and 3 parts of calcium sulfate;

Embodiment 3

[0066] Example 3: In the humid and rainy areas in the south where the soil resistivity is less than 500Ωm, the grounding diversion anticorrosion concrete powder includes the following raw materials by weight: 9 parts of ferrophosphorus powder, 0.6 parts of neodymium oxide, 1.4 parts of hydrophobic powder, and iron ore tailing powder 13 parts of raw materials, 52 parts of graphite powder, 18 parts of bentonite, 2 parts of calcium carbonate and 4 parts of calcium sulfate.

[0067] Further, the diversion anti-corrosion concrete belt 2 is preferably mixed by 70%-80% of the ground diversion anti-corrosion concrete powder and 20%-30% of the cementitious material by weight percentage;

[0068] For different soil resistivities, the proportion of components in the diversion and anti-corrosion concrete belt 2 has the following examples:

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Abstract

The invention discloses a grounding diversion concrete structure, which comprises a metal grounding body and soil, a diversion anti-corrosion concrete belt is arranged between the metal grounding body and the soil, and a capacitive structure is arranged between the contact surfaces of the diversion anti-corrosion concrete belt and the metal grounding body. According to the invention, the defects of the existing grounding resistance reduction technology are overcome, and the single flow channel charge conduction mode of the existing grounding technology is changed; an extended absorption channel, an extended displacement current release path, a charge diffusion channel and a charge conduction channel which are formed by a grounding diversion anti-corrosion concrete belt, a grounding synergistic current diffusion concrete belt and soil among ground far-end zero potential points are constructed in the ground through a first absorption and second release technology, and lightning wave head impact current is absorbed and released in sequence; and then low-frequency current or power-frequency current and direct current are released, so that a single flow channel charge conduction mode in the existing grounding technology is improved into a multi-channel charge conduction mode.

Description

technical field [0001] The invention relates to the technical field of grounding diversion, in particular to a grounding diversion concrete structure. Background technique [0002] At present, there are three technical difficulties in lightning grounding: [0003] 1. When the lightning shock wave and short-circuit large current enter the ground, it is difficult to leak into the ground due to the inductive component of the grounding body and the end effect, which will cause the hazard of ground potential rise. [0004] The current methods for reducing grounding resistance include: increasing the area of ​​the grounding grid, deep well method, external grounding body, soil replacement, and grounding materials: metal grounding body, non-metallic grounding rod, grounding module, resistance reducing agent, flexible grounding body, etc. . Theory and practice have proved that these methods and materials are difficult to change the inductive structural characteristics of the groun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R4/66H01R13/66
CPCH01R4/66H01R13/66Y02A10/11
Inventor 汪斌戴争鸣彭武陈波邬震寅徐凌冯成臣张乐汪洋汪景润卢施远
Owner 黄冈强源电力设计有限公司
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