RU133980U1 - ELECTROLYTIC EARTHING DEVICE - Google Patents

Abstract

1. An electrolytic grounding device consisting of a metal electrode with a connection node with a grounding conductor located on it, characterized in that the metal electrode is hollow ∟-shaped with perforation in the horizontal part and filled with a mixture of mineral salts. 2. The electrolytic grounding device according to claim 1, characterized in that a removable cover is installed at the end of the vertical part of the metal electrode.

Description

The utility model relates to electrical engineering and can be used for grounding in permafrost, rocky or sandy soils having a high resistivity (from 300-500 Ohm * m), without the use of special equipment and bulk soil, as well as in facilities where or for reasons it is not possible to install grounding electrodes to a depth of more than 1 meter.

Known grounding devices consisting of separate rods with an electrically conductive anti-corrosion coating interconnected (see patents RU: 48112, IPC H01R 4/66, published September 10, 2005; No. 79722, H01R 4/66, published January 10, 2009 .).

Known grounding devices to achieve good grounding are driven into the ground to a depth of more than 10 m. However, such diving in rocky or permafrost soils is very problematic, since they require special drilling equipment. And in cases where the depth of a possible dive is limited, they are not applicable at all.

A grounding device is known (see patent RU No. 2416137, IPC H01R 4/66, published April 10, 2011) containing a metal electrode connected to a current-carrying cable in the form of a rod located inside a perforated tube filled with carbon backfill.

A known device is used as follows.

A device is installed in the well drilled to the required depth (to the aquifer), after which the well is filled up, leaving the output of the current-carrying cable outside. A ground conductor is connected to the output from a grounded electrical network. Electric current from the power supply network through the grounding conductor and the current-carrying cable enters the electrode located in the well, from which through a carbon backfill flows to the aquifer and spreads in the soil mass.

The disadvantages of the known device are the inability to use it in places with a limited depth of possible immersion and the need to use special drilling equipment for its installation in cases of grounding in hard soils.

The objective of the claimed utility model is to organize the possibility of high-quality and technological grounding of power grids in permafrost, rocky or sandy soils without a burial depth of more than 1 meter.

The technical result when using the utility model is to provide technological grounding of power grids in permafrost, rocky or sandy soils without deeper than 1 meter.

The technical result is achieved due to the fact that in the electrolytic grounding device, consisting of a metal electrode with a connection node with a grounding conductor located on it, the metal electrode is made hollow, образ-shaped with perforation in the horizontal part, and filled with a mixture of mineral salts.

To ensure the possibility of replacement (additive) of mineral salts inside the electrode, it is possible to have a removable cover at the end of its vertical part.

The essence of the proposed technical solution is illustrated in the figure, which shows a longitudinal section of the device.

The electrolytic grounding device comprises a hollow metal electrode 1 with perforation 2 filled with a mixture of mineral salts 3, a connection node to the grounding conductor 4, and a removable cover 5.

The installation of the grounding device is as follows.

A channel is dug in the ground with a depth of 0.5-0.8 m and a length slightly exceeding the length of the horizontal part of the metal electrode of the grounding device. Then, a mixture of graphite and bentonite is poured onto the bottom of this channel, increasing the contact area of the electrode with the soil and ensuring the stability of the leaching process in dry summers. After that, the electrode simply fits into the prepared channel and, after connecting to the grounding conductor, is filled with soil. The connection unit may be a threaded clamp into which a ground conductor is inserted and clamped, a welded current lead connected to the ground conductor separately, or any other known connecting device providing high-quality electrical and mechanical contact. If necessary, joints can be waterproofed to reduce possible corrosion.

After installation, the mixture of mineral salts, which is filled with the horizontal part of the metal electrode of the claimed device, absorbs water from the environment, turning into an electrolyte (leaching). This electrolyte penetrates the soil, increasing its electrical conductivity (lowering its electrical resistivity) and reducing its freezing (lowering the freezing temperature), as a result of which the grounding efficiency is significantly increased. Fluids are exchanged through the perforated surface of the metal electrode.

The use of the inventive electrolytic grounding device allows for high-quality and technological grounding of electrical networks in places where other grounding devices are ineffective or completely unsuitable.

Claims (2)

1. Electrolytic grounding device, consisting of a metal electrode with a connection node with a grounding conductor located on it, characterized in that the metal electrode is hollow пол-shaped with perforation in the horizontal part and filled with a mixture of mineral salts. 2. The electrolytic grounding device according to claim 1, characterized in that a removable cover is installed at the end of the vertical part of the metal electrode.

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