Conductive concrete module grounding grid
A technology of conductive concrete and grounding grid, which is applied in the direction of connecting contact materials, etc., can solve the problems of easy corrosion of grounding grid materials and large floor space, and achieve the effects of convenient and safe construction, reducing infrastructure costs, and reducing occupied area
Active Publication Date: 2014-02-19
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0003] The purpose of the present invention is to provide a conductive concrete module grounding grid, which uses conductive concrete as the grounding material to prepare the grounding module, and adopts the form of centralized laying of modules and parallel connection to the ground to establish a new three-dimensional grounding grid, which overcomes the defects in the prior art and solves the problem of At present, the grounding grid material of the transmission line tower is easy to corrode, remodeled in a short time, and occupies a large area.
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Embodiment
[0016] In the embodiment, two conductive components of carbon fiber and carbon particles are used to make conductive concrete. The conductive concrete module is in the form of a rod-shaped grounding module. The specific implementation is as follows:
[0017] 1. Prefabrication of conductive concrete grounding modules
[0018] The raw materials of conductive concrete are P Ⅱ portland cement, class Ⅱ fly ash, natural river sand, water reducing agent, carbon particles and carbon fiber; the grounding module adopts uniform reference concrete, cement and fly ash with a mass ratio of 3:1 It is a cementitious material, the water-binder ratio is 0.35 (weight ratio), the sand-adhesive ratio is 1.4 (weight ratio), the amount of water reducing agent is 2% of the mass of the cementitious material, and the amount of carbon fiber and carbon particles is based on its proportion of the reference concrete. The volume fraction is calculated, the carbon fiber content is 0.1% of the reference concr...
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The invention relates to the technical field of electric transmission line lightning protection grounding, in particular to a conductive concrete module grounding grid suitable for an electric power pylon. An existing grounding grid is buried in a radiation mode through metal material electrodes, a grounding body is large in occupied land area, and materials are prone to corrosion. Conductive components are mixed into ordinary concrete so that conductive concrete grounding modules can be prefabricated, the conductive concrete grounding modules are arranged around a foundation pit of the electric power pylon in a centralized mode, an electrode outgoing line of each conductive concrete grounding module is connected with a secondary connecting wire in parallel, then, all the secondary connecting wires are connected to a main connecting wire in parallel, and therefore the grounding grid of a parallel type three-dimensional network structure is set up. The conductive concrete module grounding grid has the advantages that the grounding modules are manufactured through the conductive concrete and are distributed in a three-dimensional and parallel mode, the defect that metal electrodes are prone to corrosion and other defects are overcome, the service life of a grounding device is prolonged, manufacturing cost and maintenance expenses are reduced, the conductive concrete module grounding grid is convenient and safe to construct, and meanwhile the occupied land area and the influences on the surrounding environment are reduced.
Description
technical field [0001] The invention relates to the technical field of lightning protection and grounding for transmission lines, and is suitable for grounding grids of transmission line towers, in particular to a conductive concrete module grounding grid. Background technique [0002] Lightning strike is a relatively serious natural disaster. The lightning protection grounding technology of transmission lines is directly related to the safe operation of the power supply system. At present, the grounding grid design of my country's transmission lines is relatively simple. Most of them use metal materials such as flat steel and round steel as grounding electrodes, and they are buried radially from the center of the tower. However, the materials of these grounding bodies are not corrosion-resistant, the grounding resistance increases, and they are in disrepair for a long time, which greatly reduces the conductivity of the grounding grid, and the grounding bodies occupy a large...
Claims
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Inventor 赵庆新马进李炜张亚军徐令娜梁晓东李鑫王勇
Owner STATE GRID CORP OF CHINA