Anti-corrosion and anti-theft grounding rod for distribution network and its use method

Abstract

The invention discloses an anticorrosion antitheft ground rod of a power distribution network. The anticorrosion antitheft ground rod comprises a connection rod, a ground rod arranged at the lower part of the connection rod and a drive head arranged at the upper part of the connection rod, wherein a drill is arranged at the end part of the ground rod; the outer diameter of the drill is greater than or equal to the outer diameter of the connection rod; a vertical-downward blind hole is formed in the connection rod; multiple outward through holes are formed in the side wall of the blind hole; and a fastening component matched with the through hole is arranged in the through hole. In the invention, by adopting the expandable connection rod, the contact area between the connection rod and the surrounding soil is increased, and a better antitheft effect can be obtained; moreover, the resistance value becomes smaller due to the increase of the contact area, and thus the electric conduction effect is better; for a better anticorrosion effect, a 1-2mm cooper coating layer and a resistance reducing agent are arranged for protection on the surface so as to obtain better anticorrosion and electric conduction effects; and the cost is low, and the ground rod deserves application and popularization.

Description

technical field [0001] The invention belongs to the technical field of substation equipment and devices, and in particular relates to a distribution network anti-corrosion and anti-theft grounding rod and a using method thereof. Background technique [0002] Although the proportion of the grounding device in the entire investment of power transmission and transformation projects and major buildings is very small, the accidents caused by it are extremely alarming. It can be described as a "grid killer". Secondary equipment, such as DC, protection, communication and other equipment, then caused the expansion of accidents, some caused equipment damage, caused fires, some caused the complete shutdown of power plants and substations, and some even developed into serious system accidents. For example, a power plant in Sichuan once discharged a high potential into the main control room due to severe corrosion of the neutral point grounding wire of the transformer, causing multiple ...

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Problems solved by technology

[0003] Due to the corrosion problem of the metal material used for grounding, it has a relatively large impact on the grounding resistance, which is a big hidden danger. This problem has always troubled users.

[0005] 1) There are copper wires (belts), copper clad steel (including electroplated copper, etc., continuous casting copper) lightning protection grounding wires. Although the corrosion resistance performance has been improved for general medium soil environments, it still cannot meet the requirements of certain specific organic media. Corrosive environment, because once the product is formed, it cannot change its surface corrosion resistance to specific corrosive media, and a large amount of copper is buried in the soil, if it does not match the background metal content of the original soil environment, the soil environment of the area will be used polluted

[0006] 2) There are galvanized steel materials supplemented by a large amount of resistance reducing agent to reduce the grounding resistance, but in the construction under the complex climate environment (alpine, severe cold, etc.), it is basically impossible to meet the construction requirements, and the reliability of the electric welding joint At the same time, the resistance reducing agent may also cause corrosion to the grounding steel material, and the welding point cannot be guaranteed against corrosion.

The method described in ZL03214327.3 only uses a bentonite drag-reducing agent, which can only equivalently increase the cross-sectional area of ​​the grounding body, and cannot change the various drag-reducing agents that cannot be completely and fully wrapped due to harsh construction conditions. For the grounding body, it is unrealistic to design various complex control methods for the construction process because the grounding body needs to be completely and fully wrapped. This has been a consensus in the industry

At the same time, the resistance reducing agent should be formed into thick flocculation on site (the manual process cannot guarantee the uniform coordination of various components), and the resistance reducing agent and the grounding body are in contact with metal and non-metal, and are a combination of solid and liquid phases. It has always been a big unsolvable problem in the field of grounding

[0007] 3) Some grounding modules or ionic grounding bodies are used. These products are produced by changing the resistance reducing agent. Not only are the prices high, but also the grounding body is developed in depth, and the construction cost is greatly increased.

In addition, the stability and reliability of the contacts at the connection point are limited by the quality of the later construction conditions, and the stability of the electrical connection cannot be guaranteed from the source

[0009] 5) Common grounding electrodes are installed underground without necessary anti-theft measures, so that they are buried in remote areas without anti-theft measures, and are easy to be stolen, resulting in more serious consequences

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