Physical grounding resistance reducing agent

Abstract

The agent mainly consists of electrode graphite and cement, which is an ideal conduction material for earthing and has low resistivity for durative action and stability service. It can satisfy earthing protective requirements for various electric or microelectronic equipment with in quite long period under the various environmental conditions.

Description

1. Technical field [0001] The invention relates to a grounding conductive material, especially a physical grounding resistance reducing agent, which is used to reduce the grounding resistance of various grounding devices. 2. Background technology [0002] Setting up a grounding device is an important measure to ensure the safe operation of people, buildings, electrical and microelectronic equipment. The grounding device is a permanent construction facility. After the grounding electrode is buried in the ground, it cannot be taken out for maintenance at will. Therefore, the grounding engineers are very concerned about the durability and reliability of the grounding resistance reducing agent. With the development of modern construction and the advancement of science, the grounding technology is also being continuously improved. [0003] As early as the 1950s, people used to increase the geometric size of the metal (steel or copper) grounding body to reduce the grounding resis...

AI Technical Summary

Problems solved by technology

[0003] As early as the 1950s, people used to increase the geometric size of the metal (steel or copper) grounding body to reduce the grounding resistance for high resistivity soil grounding. This method not only consumes a lot of high-quality metal materials, but also is expensive and sometimes difficult to achieve. its purpose and effect

In the 1960s, salt was added to industrial waste or charcoal as a grounding resistance reduction material. This resistance reduction material had an obvious resistance reduction effect in the early stages of its use, but it severely corroded the metal grounding electrode, and seasonal groundwater The ups and downs of the position will lead to the loss of electrolyte, thus making it lose the effect of reducing resistance

Composed of the components of the drag reducing agent, people do not need in-depth analysis to know its obvious shortcomings: First, sodium nitrite and calcium nitrite are both nitrites, which are extremely toxic carcinogens , which is a well-known fact, will cause great harm to the health of operators during its production, processing and construction, and will also cause serious pollution to the soil environment where it is buried; secondly, because the drag reducing agent contains up to 5.2% acetylene black, and acetylene black is a material with excellent performance, but the price is very expensive. Using acetylene black as an effective component of the drag reducing agent, first, the production cost is very high, and second, the high quality is poor and wasteful. Thirdly, the carbon-based alloy contained in the drag reducing agent is specifically specified as the main and by-products of natural mineral graphite and various graphite products that meet the requirements of the index, that is, the carbon-based alloy can only be It is a mixture, not an alloy that forms a constant compound formula, so the metal powder in the mixture cannot maintain its metal free electron conductivity in the drag reducer; Fourth, the inorganic salt component contained in the drag reducer They are all high resistivity inorganic substances, and the content can be as high as 70%. Therefore, their electrical conductivity is low, that is, the resistance reducing properties of the resistance reducing agent will not be very good