CN206098764U - Grounding grid and the installation structure of the grounding grid - Google Patents

Abstract

The utility model discloses a grounding grid and an installation structure of the grounding grid, comprising a grid body and a current guide for guiding current to a grounding device, the current guide is fixed on the grid body, The net body includes a plurality of graphite carbon fiber unit elements, and the plurality of graphite carbon fiber unit elements are interlaced to form a grid network structure. The grounding grid has good electrical conduction performance, anti-corrosion and anti-aging performance, and its maintenance cost is low, the structure is simple, and the installation is convenient.

Description

Grounding grid and the installation structure of the grounding grid

technical field

The utility model relates to the technical field of electric grounding devices, in particular to a grounding grid and an installation structure of the grounding grid.

Background technique

In traditional high-voltage transmission lines, power plants, substations and other fields, it is necessary to install effective and reliable grounding grids to protect the safety of equipment and people. The grounding grid is usually buried in the soil with high moisture content, especially in the northwest and coastal areas of my country, where there are many saline-alkali lands, so the natural corrosion of the metal grounding grid and the grounding conductor in the soil is very serious. In fact, under normal circumstances, tens of amps of unbalanced current flow in the grounding grid, and there is serious electrolytic corrosion on the metal grounding grid, especially at the connection between the center point and the grounding grid. If the metal grounding grid is severely corroded, causing a large number of grounding conductors to corrode and break, the fault current and lightning current will not flow into the ground quickly through the grounding grid, the ground potential of the grounding grid will increase severely, and the unevenness of the potential distribution will increase seriously, which will It poses a great threat to the personal and equipment safety in the power generation and substation. For the metal grounding grid buried in the soil for a long time, the conduction performance of the grounding grid needs to be tested every year, and the corrosion of the grounding conductor is excavated to check. When the corrosion of the grounding grid is particularly serious, the grounding grid needs to be replaced as a whole. During this period, it will cause the outage of the power substation for maintenance, which will bring great economic losses.

Contents of the invention

Based on this, the utility model aims to overcome the defects of the prior art and provide a grounding grid and a grounding grid installation structure with good corrosion resistance, long service life, low maintenance cost and simple structure.

Its technical scheme is as follows:

A grounding grid, comprising a grid body, and a current guide for guiding current to a grounding device, the current guide is fixed on the grid body, and the grid body includes a plurality of graphite carbon fiber unit elements A plurality of graphite carbon fiber unit elements are interlaced to form a grid network structure.

In one of the embodiments, a ground electrode assembly is further included, the ground electrode assembly includes at least one ground electrode, and the ground electrode is fixedly connected to the grid body.

In one embodiment, the grid body is a rectangular grid structure, arc-shaped transition parts are provided at the four corners of the rectangular grid structure, and the ground electrode is fixed to the arc-shaped transition parts.

In one of the embodiments, the number of the ground electrodes is three, and the three ground electrodes are all fixed on the arc-shaped transition portion.

In one of the embodiments, a grid-reinforcing portion is provided along the periphery of the net body.

In one of the embodiments, the current guide is copper wire, iron wire or steel wire.

In one of the embodiments, the rectangular grid structure includes a plurality of interconnected grid unit elements, and the shape of the grid unit elements is rectangle, circle, triangle or rhombus.

The utility model also provides a grounding grid installation structure, which includes the grounding grid as claimed in the above claims, and a grounding device, and the grounding grid is electrically connected to the grounding device.

The beneficial effects of the utility model are:

The above-mentioned grounding grid includes the interconnected grid body and the current guide. By interlacing the grid body with a plurality of graphite carbon fiber unit elements to form a grid network structure, not only the grounding grid has good electrical Conductivity performance and anti-corrosion and anti-aging performance, and its later maintenance cost is low, simple structure, easy installation.

The installation structure of the above-mentioned grounding grid not only makes the grounding grid have good electrical conduction performance and corrosion resistance by burying the above-mentioned grounding grid, but also interlacing the grid body with a plurality of graphite carbon fiber unit elements to form a grid mesh structure. Anti-aging performance, low maintenance cost, simple structure and easy installation.

Description of drawings

Fig. 1 is the structural representation of the ground grid described in the utility model embodiment;

Fig. 2 is a structural schematic diagram of the installation structure of the grounding grid described in the embodiment of the present invention.

Explanation of reference signs:

100. Mesh body, 120. Graphite carbon fiber unit element, 140. Mesh encryption part, 200. Current guide, 300. Grounding electrode assembly, 320. Grounding electrode, 400. Rectangular grid structure, 420. Arc transition part , 440, the grid unit element, 500, the grounding device.

detailed description

Embodiments of the present utility model are described in detail below:

As shown in Figure 1, a grounding grid includes a grid body 100, and a current guide 200 for guiding current to a grounding device 500, the current guide 200 is fixed on the grid body 100, The net body 100 includes a plurality of graphite carbon fiber unit elements 120 , and the plurality of graphite carbon fiber unit elements 120 are interlaced to form a grid network structure.

In this embodiment, the graphite carbon fiber unit unit 120 is preferably made of braided carbon nanofibers of 350mm×5mm or rigid nanocarbon fibers of 100mm×4mm, and a plurality of the graphite carbon fiber unit units 120 are interlaced to form a grid Mesh structure, thus has good current distribution ability and electrical conduction performance. Taking a grounding grid with a size of 100mm×100mm as an example, the size of the grid is 5m ² , the resistivity is 500Ω·m, and the buried depth of the grounding grid is 0.8m. The grid mesh structure formed by interlacing of unit elements 120 not only makes the grounding grid have good electrical conduction performance and anti-corrosion and anti-aging performance, but also has low maintenance cost, simple structure and convenient installation. In addition, the current guide 200 is copper wire, iron wire or steel wire. This not only has good current guiding performance, but also transmits the current on the grounding grid to the grounding device 500 in time to ensure the safety of personnel and equipment. At the same time, its size is smaller, which is more convenient for laying and improves the convenience of installation. Further, the use of copper has better thermal stability than that of graphite.

In addition, the above ground grid further includes a ground electrode assembly 300 , the ground electrode assembly 300 includes at least one ground electrode 320 , and the ground electrode 320 is fixedly connected to the grid body 100 . The material of the ground electrode 320 described in this embodiment is preferably copper, specifically copper wire or copper strip, etc., which are fixedly connected to the grid body 100, which not only makes the ground grid have good current conduction performance, but also can Reduce the contact potential difference of the ground grid.

In one of the embodiments, a grid refinement portion 140 is provided along the periphery of the net body 100 . The grid encryption part 140 is specifically an annular area along the edge of the grounding grid to its center with a width of 5 meters. In this annular area, a plurality of graphite carbon fibers are densely arranged, thereby reducing the contact potential difference of the grounding grid and ensuring The grounding grid is safe and reliable.

The grid body 100 is a rectangular grid structure 400 , each of the four corners of the rectangular grid structure 400 is provided with an arc-shaped transition portion 420 , and the ground electrode 320 is fixed to the arc-shaped transition portion 420 . Designing the four vertices of the net body 100 as an arc-shaped transition part 420 can reduce the excessive concentration of induced current and ensure that the current can be drawn out smoothly. At the same time, the arc-shaped transition part 420 is connected to the ground electrode 320, The contact potential difference between the grounding grid and the grounding device 500 can be reduced, making the working environment of the grounding grid safer and more reliable.

Further, the number of the ground electrodes 320 is three, and the three ground electrodes 320 are fixed on the arc transition portion 420 . Arranging three ground electrodes 320 at the arc-shaped transition portion 420 can increase the length of the ground grid, which is beneficial to reduce the ground resistance and further reduce the contact potential difference.

The rectangular grid structure 400 includes a plurality of interconnected grid unit elements 440 , and the shape of the grid unit elements 440 is rectangle, circle, triangle or rhombus. Designing the above-mentioned different shapes of the grid unit element 440 can improve the current distribution according to the actual use environment. At the same time, it can also increase the types of grounding grids, enrich the product styles, and improve product competitiveness.

As shown in FIG. 2 , the present invention also provides a grounding grid installation structure, which includes the grounding grid and the grounding device 500 as described in the above claims, and the grounding grid is electrically connected to the grounding device 500 . By burying the above-mentioned grounding grid, by interlacing the grid body 100 with a plurality of graphite carbon fiber unit elements 120 to form a grid network structure, not only the grounding grid has good electrical conduction performance and anti-corrosion and anti-aging performance, Moreover, the later maintenance cost is low, the structure is simple, and the installation is convenient.

The various technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (8)

1. A grounding grid, characterized in that it includes a grid body, and a current guide for guiding current to a grounding device, the current guide is fixed on the grid body, and the grid body includes A plurality of graphite carbon fiber unit elements, the plurality of graphite carbon fiber unit elements are interlaced to form a grid network structure. 2. The grounding grid according to claim 1, further comprising a grounding electrode assembly, said grounding electrode assembly comprising at least one grounding electrode, said grounding electrode being fixedly connected to said grid body. 3. The grounding grid according to claim 2, wherein the grid body is a rectangular grid structure, the four corners of the rectangular grid structure are provided with arc-shaped transition parts, and the grounding electrode is fixed on the arc transition part. 4 . The ground grid according to claim 3 , wherein the number of the ground electrodes is three, and the three ground electrodes are all fixed on the arc-shaped transition portion. 5 . The grounding grid according to claim 1 , characterized in that, a grid-reinforcing portion is provided along the periphery of the grid body. 5 . 6. The ground grid according to claim 1, characterized in that, the current guiding member is copper wire, iron wire or steel wire. 7. The ground grid according to claim 3, wherein the rectangular grid structure comprises a plurality of interconnected grid unit elements, and the shape of the grid unit elements is rectangular, circular, triangular or rhombus . 8. An installation structure for a grounding grid, comprising the grounding grid as claimed in any one of claims 1 to 7, and a grounding device, the grounding grid being electrically connected to the grounding device.