Distribution transformer grounding structure capable of changing soil resistivity

Abstract

The invention discloses a distribution transformer grounding structure capable of changing soil resistivity. The structure comprises a grounding plate, a lifting column and a grounding column, the lifting column is movably inserted into the grounding plate, the grounding column is fixedly connected to a bottom end of the lifting column, and the grounding column is connected with a connecting wire;side grooves are symmetrically formed in the positions, on the two sides of the lifting column, of the grounding plate, extrusion plates are movably arranged in the side grooves and fixedly connectedwith the lifting column, and lifting springs are connected to upper ends of the extrusion plates. Through the cooperative arrangement of ground inserting plates and pushing plates, a soil layer between the ground inserting plates can be extruded and tamped such that the effect of reducing the soil resistivity is achieved; and meanwhile, the relatively high concentration of conductive ions in thesoil and the water content in the soil are kept within a very long period of time such that the resistivity of the soil is reduced.

Description

technical field [0001] The invention relates to the technical field of distribution transformers, in particular to a distribution transformer grounding structure capable of changing soil resistivity. Background technique [0002] In the prior art, the publication number is CN 105958224 A. The grounding structure of a distribution transformer includes a grounding plate and a grounding pole. The grounding pole is arranged on the extension line of the grounding plate. The pole includes a cylinder and a connecting piece, the connecting piece is provided with a terminal and / or a wiring hole, and a fixed joint is provided on the grounding plate; the advantage of the present invention is that the grounding pole is set on the extension line of the grounding plate, effectively increasing Since the grounding resistance R is equal to the soil resistivity × conductor length / grounding area, when the grounding area increases, the grounding resistance R decreases correspondingly when the...

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Problems solved by technology

[0003] However, it is obvious that the above-mentioned grounding structure still has obvious defects during use: since the grounding resistance R is equal to the soil resistivity × conductor length / grounding area, when it is necessary to reduce the grounding resistance R, not only can increase The large grounding area can also reduce the soil resistivity, but the above grounding structure cannot adjust the resistivity of the soil layer, so the effect of reducing the grounding resistance value R cannot be fully reflected

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