RU173093U1 - DEPTH ANODE EARTH - Google Patents

Abstract

Anode ground electrode system deep. The utility model relates to electrochemical protection and can be used for anode grounding of cathodic corrosion protection installations of steel and reinforced concrete structures in contact with soil, river and sea water, and other electrolytic media. The technical problem solved by the utility model is to reduce the resistance to spreading of the anode current, i.e. increasing the stability of the device. The essence of the device: the anode ground electrode 1 contains an electrode 2 of the anode ground, surrounded by a layer 5 of mineral activator soil, which is used as a mixture of shungite material with a particle size distribution of 1.0-20 mm 2 ill.

Description

The utility model relates to electrochemical protection and can be used for anode grounding of cathodic corrosion protection installations of steel and reinforced concrete structures in contact with soil, river and sea water, and other electrolytic media.

Known deep ground electrode containing a cast electrode in a cylindrical body with a supporting frame, filled with an activator, the cylindrical body is equipped with a gas pipe fixed to its side surface, and a current lead wire connects the electrode to the cathodic protection station via a contact node, the supporting frame is installed in the cavity of the cylindrical body, and as an activator, a coke-synthetic filling was used containing mixtures of coke breeze of various fractions and a halogen-free synthetic activator - RU 131726 U1, 2013

A disadvantage of the known device is the high transient resistance of the anode-soil, which increases energy consumption during operation of the deep ground electrode, the high rate of anode dissolution of the ground electrode, the low drainage ability of the mineral activator, its high cost and hygroscopicity, as a result of which its shelf life is reduced.

Similar disadvantages are inherent in deep grounding, which contains a garland of grounding blocks connected to each other, each of which includes a working electrode located in a hollow housing filled with an activator, and a connection cable, as well as a gas outlet pipe mounted on the housing with the possibility of outputting it together with the cable to surface and means for connecting the grounding blocks into a garland; coke-mineral filling, containing a mixture of coke breeze of various fractions and bezel-free, was used as an activator halide mineral activator - RU 44422 U1, 2005

The closest analogue is the anode ground electrode containing a central electrode with metal elements fixed to it, surrounded by a cylinder in the form of an activator, the activator is made on the basis of a composition of electrically conductive granular porous granular material and is located in a shell made of steel sheet, the central electrode is made of graphite plastic , and as the activator used graphite chips - RU 137700 U1, 2014

The disadvantages of the known ground electrode system are that during operation, the resistance to spreading of the anode current increases disproportionately to the wear of the graphite chips, i.e. the device is unstable and, in addition, the oxidation-reduction potential of the carbon activator increases over time, which increases the current load, reducing the service life of the ground electrode. It should also be noted that graphite chips are a relatively expensive material for use in anode grounding conductors. In addition, the exhaust pipe is clogged with graphite oxide waste, which also leads to failure of the anode ground electrode.

In connection with these shortcomings, the technical problem solved by the utility model is to reduce the resistance to spreading of the anode current, i.e. increasing the stability of the device and lowering the redox potential of the carbon activator, i.e. decrease in current load, increase in service life. In addition, the use of the proposed material for use in anode grounding conductors will significantly reduce the cost of their manufacture, and in accordance with its antibacterial properties, it will improve the biological environment in the application environment.

The technical problem is solved by a deep anode ground electrode containing an anode ground electrode surrounded by a layer of mineral soil activator, which is used as a mixture of schungite material with a particle size distribution of 1.0-20 mm.

In FIG. 1 shows a device of a deep anode ground electrode; in FIG. 2 - dependence of the increase in the amount of discharged anode gases Q (m ³ ) on the depth L (m) of the anode ground electrode in accordance with the degree of voidness of schungite material.

The anode ground electrode 1 contains a sectional electrode 2 of the anode ground electrode located below the surface of the earth 3 in the borehole 4 and surrounded by a layer of mineral activator - schungite material 5 with a particle size distribution of 1.0-20 mm.

The electrodes 2 of the ground electrode 1 sequentially connected in the section have combined leads 6 for connection to a cathode converter (not shown) through a terminal block 7 located in the terminal block 8.

The technical effect is achieved by the use of a new mineral soil activator - shungite material with alternating adjustable particle size distribution, ensuring the removal of electrode (anode) gases. In this case, depending on the density of the electrical resistance of the capacitance of the soil layers, alternating along the length of the deep electrode, a directed alternation of shungite mineral activator of different granometric composition is possible.

The fractional composition of schungite mixtures according to standard sieves for sieving:

- fraction 1 (crushed stone) - 20-10 mm, average particle size - 15 mm;

- fraction 2 (small crushed stone) - 10-5 mm, average size - 7.5 mm; the average particle size is 3.5 mm;

- fraction 4 (coarse sand) - 2.5-1.0 mm, average particle diameter - 1.5 mm;

- fraction 5 (sand) - 1.0-0.65 mm, average particle size - 0.8 mm.

Based on the theory of packing density, the three most dense compositions of shungite material (mineral activator) were selected.

Composition 1.

The ratio of the particle diameters of the coarse fraction to the subsequent, finer (d ₁ / d ₂ ) ≈4:

- fraction 1 crushed stone of 20-10 mm, with d ₁ = 15 mm - content of 47%;

- fraction 3 of small gravel - 5-2.5 mm, with d ₂ = 3.5 mm - content of 32%;

- fraction 5 sand - 1.0-0.65 mm, with d ₃ = 0.8 mm - content of 21%.

The voidness of composition 1 is 21%.

The specified composition is preferably located in the upper layers of soil backfill.

Composition 2.

The ratio of the particle diameters of the coarse fraction to the subsequent, finer (d ₁ / d ₂ ) ≈16:

- fraction 1 gravel 20-10 mm, with d ₁ = 15 mm - content of 16%;

- fraction 5 sand - 1.0-0.65 mm, with d ₅ = 0.8 mm (1.5 mm possible) - content of 30%.

The voidness of composition 2 is 16%.

The specified composition is preferably located in the middle layers of soil backfill.

Composition 3.

The ratio of the particle diameters of the coarse fraction to the subsequent, finer (d ₁ / d ₂ ) ≈8:

- fraction 1 gravel 20-10 mm, with d ₁ = 15 mm - the content of 54%;

- fraction 3 fine crushed stone - 5-2.5 mm, with d ₃ = 3.5 mm (1.5 mm possible) - 30% content;

- fraction 5 sand - 1.0-0.65 mm, with d ₅ = 0.8 mm - content of 16%.

The voidness of composition 3 is 14%.

The specified composition is preferably located in the lower layers of soil backfill.

Referring to FIG. 2 the dependence of the increase in the amount of anode gases Q (m ³ ) on the depth L (m) of the anode ground electrode in accordance with the degree of voidness of shungite material 5 shows that with an increase in the degree of voidness the number of anode gases is naturally increased, since the resistance of the medium (shungite material 5 decreases ), the comfort of anode gas removal is ensured: zone 9 of schungite material with a voidness of 14%, zone 10 of schungite material with a void of 16%, zone 11 of shungite material with a void of 21%. With this arrangement of shungite material 5, a uniform discharge of electrode gases along the length of the anode ground electrode in space electrode 1 - well 4 is obtained, as well as optimal current loads on the ground electrode, which ultimately allows the device to stabilize, exclude the exhaust pipe from the components of the anode ground, and reduce labor costs during installation and, as a result, increase the reliability of the anode ground.

In addition, the use of shungite material with a particle size distribution from 1.0 to 20 mm for use in anode grounding conductors will significantly reduce the cost of their manufacture, and in accordance with its antibacterial properties, it will improve the biological environment in the application environment.

Claims (1)

A deep anode ground electrode containing an anode ground electrode surrounded by a layer of mineral soil activator, characterized in that a mixture of schungite material with a particle size distribution of 1.0-20 mm is used as a mineral activator.

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