Structure and manufacturing method of lightning protection grounding grid in karst area

Abstract

The invention discloses a structure and a manufacturing method of a lightning protection grounding net in a karst area. First, a deep well is set up in the area where lightning protection equipment needs to be buried, and a metal electrode with a penetration hole is put into the deep well, and then the resistance-reducing The material is injected from the metal electrode, and the penetration hole of the metal electrode is used to enter and fill the deep well. When opening a deep well, first sample the geological layer of the deep well, and open the permeable holes on the metal electrode according to the sampling results of the geological layer, so that the position of the permeable hole on the metal electrode placed in the deep well corresponds to the position of the rock section in the geological layer . The present invention can use the resistance-reducing material to fill up the geological cross-section layer in the karst area during on-site construction, improve the electrical conductivity of the geology around the metal electrode, and meet the requirements of the resistance value of the substation ground network. It has the advantages of simple structure, simple operation, and low cost. sex.

Description

technical field [0001] The invention relates to a structure of a lightning protection grounding grid and a manufacturing method thereof, in particular to a structure of a lightning protection grounding grid in a karst area and a manufacturing method thereof. Background technique [0002] my country's requirements for the design of the original ground network of substations stipulate that the resistance value of the substation ground network must be limited to less than or equal to 0.5 ohms. However, when the geology and soil conditions of the geographical location where the substation is located are different, the variation range of the resistivity will also be quite different. The latter will affect the resistivity due to rock faults in the geology. At the same time, because the lightning protection grounding grid is mostly constructed on site, in this environment where the resistance value is uncertain, the method of enlarging the area of ​​the grounding grid is now mostl...

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Problems solved by technology

However, when the geology and soil conditions of the geographical location where the substation is located are different, the variation range of the resistivity will also be quite different. The latter will affect the resistivity due to rock faults in the geology

At the same time, because the lightning protection grounding grid is mostly constructed on site, in this environment where the resistance value is uncertain, the method of enlarging the area of ​​the grounding grid is now mostly used. It is difficult to estimate the change of resistance value, and it is difficult to reduce the resistance value of the ground grid to the range specified in the regulations

The other is to change the geological resistance, such as a grounding module that uses copper pipes as the main body, adds electrolyte inside, releases the electrolyte through the drain hole, and actively adjusts the resistivity of the surrounding soil. It not only considers anti-corrosion but also has good resistance reduction As a result, it is indeed a better grounding material, but this method first has a higher price; second, because there are many rock sections in karst areas, the electrolyte in the copper pipe is limited and cannot be connected when encountering geological sections in karst areas , formed faults and failed to achieve the expected effect, unable to adapt to meet the needs of karst areas

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