Anti-saline alkali corrosion resistance-reduction combined grounding body

Abstract

The invention relates to an anti-saline alkali corrosion resistance-reduction combined grounding body which is characterized by mainly comprising an inner core of galvanized flat steel and a conductive concrete outer cladding, wherein the conductive concrete outer cladding is claded around the inner core; the fixed joint tip of the inner core extends and is exposed out of the outer end surface of the outer cladding. The invention has the advantages that the grounding body is a model integrating the three methods. Conductive cement filled around the grounding body isolates a grounding conductor and saline alkali soil and plays a role of a protecting layer; the conductive cement filled between the grounding conductor and the soil plays a role of a physical resistance reducer; and by adopting a grounding net to make the original grounding body which is easily corroded by saline alkali become into the anti-saline alkali corrosion grounding body after the conductive cement is filled around the grounding body, the corrosion resistance of the grounding conductor is improved by 10 times and the through-current and discharge capacity are also improved, thereby achieving the dual purposes of resisting corrosion and reducing grounding resistance.

Description

technical field [0001] The invention belongs to a grounding grid for safe operation of a power system, in particular to a saline-alkali corrosion-resistant and resistance-reducing combined grounding body that forms the grounding grid. Background technique [0002] The grounding grid is an important device for the safe operation of the power system. When lightning strikes or electrical equipment fails, guide the lightning current or fault current to leak to the earth through the grounding grid, thereby avoiding personal accidents, equipment damage or building damage. At present, the material generally used in the design of the grounding grid is hot-dip galvanized flat steel. However, my country's coastal areas, especially Tianjin, Shandong, Hebei and other places, have a large number of saline-alkali lands. The grounding grids of power plants and substations in these areas are potentially threatened by the corrosion of saline-alkali lands to the safe operation of the power g...

AI Technical Summary

Problems solved by technology

Reasonable copper mesh design and construction can ensure the service life of the copper mesh for more than 30 years. The disadvantages are: the price of copper is high, and when copper and steel are used together, the primary battery effect of copper and steel will accelerate the breakdown of the connected steel structure. corrosion rate

It has good electrical conductivity and good chemical stability, and its corrosion rate is 30 times smaller than that of steel. Its disadvantages are: poor mechanical properties such as deformation resistance and compression resistance, and it will break in case of surface subsidence and affect grounding performance

Cathodic protection uses the sacrificial anode method to protect the ground grid with the cathode, but practice has proved that this method is not advisable

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