CN103259104B - A kind of gang of wells ground network - Google Patents

Abstract

The invention discloses a well group grounding network, which includes seven grounding electrodes and grounding lead wires; among the seven grounding electrodes, one grounding electrode is arranged in the middle, and the other six grounding electrodes are located around it; The six ground electrodes are not directly connected to each other, but are respectively connected to the middle ground electrodes. The invention has the advantages of high safety, high land use rate, convenient maintenance and replacement, and the like.

Description

A Well Group Grounding Grid

technical field

The invention relates to a well group grounding grid.

Background technique

At present, the grounding grids used in power plants and substations at home and abroad all use cross-shaped square or rectangular grids. Due to the horizontal layout of these shapes, not only a lot of grounding materials are wasted, but also the project is huge. It is very difficult to replace after corrosion. Not only that, because the current ground grid is buried shallowly, it also brings problems such as high ground resistance and the resulting high ground step voltage.

Contents of the invention

The purpose of the present invention is to solve the above problems and provide a well group grounding grid, which has the advantages of high safety, high land utilization rate, and easy maintenance and replacement.

In order to achieve the above object, the present invention adopts the following technical solutions:

A well group grounding network, including seven grounding electrodes and grounding wires; the seven grounding electrodes, one of which is located in the middle, and the remaining six grounding electrodes are located around it; the six surrounding grounding electrodes are are not directly connected to each other, and are respectively connected to the ground electrodes located in the middle.

The connection between the ground electrodes is connected with each other through conductors under the shallow soil.

The six surrounding ground electrodes are evenly distributed around the middle ground electrode: the connection line between any two surrounding ground electrodes and the middle ground electrode is 60°; all surrounding ground electrodes The distance to the ground electrode located in the middle is equal.

The grounding electrode includes a well body, a grounding body and auxiliary filling materials. The grounding body is set in the well body, and the middle is filled with auxiliary filling materials.

The ground lead wire is drawn out from the ground electrode located in the middle.

Beneficial effects of the present invention:

1. The deep well-type grounding electrode quickly introduces a large impact grounding current into the ground, increasing the grounding safety;

2. The three-dimensional structure of the well group in space maximizes the grounding density and increases the land use efficiency;

3. In areas with high soil conductivity such as mountains and deserts, the high-density well group grounding grid has the largest layout density and occupies a small area, which is conducive to choosing an optimal grounding point to bury the grounding grid;

4. After many years of use, each ground electrode can be inspected, maintained and replaced one by one without power failure or production stoppage;

5. The grounding grid has a small capacitance to the ground, and when it is used in a neutral point grounding grid, the coupling effect of the neutral point to the ground is small, which is more conducive to the safety of the power grid.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of a single ground electrode.

Among them, 1. Well body; 2. Auxiliary filling material; 3. Grounding body; 4. Grounding electrode; 5. Grounding lead wire; 6. Conductor.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 and 2, a well group grounding network includes seven grounding electrodes 4 and grounding lead wires 5; among the seven grounding electrodes 4, one grounding electrode 4 is set in the middle, and the remaining six grounding electrodes 4 Located around it; the six surrounding ground electrodes 4 are not directly connected to each other, and are respectively connected to the middle ground electrodes 4 .

The connection between the ground electrodes 4 is interconnected through the conductor 6 under the shallow soil.

The six surrounding ground electrodes 4 are evenly distributed around the middle ground electrode 4: the connection line between any two surrounding ground electrodes 4 and the middle ground electrode 4 is at 60°; The distances between the surrounding ground electrodes 4 and the middle ground electrodes 4 are equal.

The ground electrode 4 includes a well body 1, a ground body 3 and an auxiliary filling material 2. The ground body 3 is arranged in the well body 1, and the auxiliary filling material 2 is used for filling in the middle.

As mentioned above, the ground lead wire 5 is drawn out from the ground electrode 4 located in the middle.

When constructing the grounding network of this well group, firstly choose a place with low soil resistivity, and choose a reasonable spacing to drill deep wells. Then connect the ground electrode 4 located in the middle with the ground electrode 4 located in the surroundings with a conductor 6, and lead out the ground grid lead wire 5 on the ground electrode 4 located in the middle. Finally, the ground grid is buried.

Each grounding electrode 4 adopts a corrosion-resistant alloy steel pipe with a diameter of more than 25mm, and the inside of the steel pipe is graphite synthetic conductive material. The depth of each well body 1 is 1.5 to 5 meters. The distance between the ground electrode 4 in the middle and the other ground electrodes 4 can be divided into 2 to 20 meters according to different voltage levels. steel. When constructing the ground electrode 4, first use a drilling rig with a diameter of more than 20 cm to drill a well, and after the ground body 3 is put down, the surroundings are filled with mixed materials such as graphite and bentonite as the auxiliary filling material 2, and finally water is sealed.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that on the basis of the technical solutions of the present invention, those skilled in the art do not need to pay creative efforts. Various modifications or deformations that can be made by labor are still within the protection scope of the present invention.

Claims (1)

1. a gang of wells ground network, is characterized in that, comprises seven earth electrodes and grounding lead is reached the standard grade; Described seven earth electrodes, one of them earth electrode is located at centre, and all the other six earth electrodes are positioned at around it; Describedly directly not connect between six earth electrodes of surrounding, and be positioned at middle earth electrode be connected with described respectively;

Be positioned at around middle earth electrode described in described six earth electrodes being positioned at surrounding are evenly distributed on: between two adjacent earth electrodes in surrounding and the earth electrode in centre, be wired to 60 °; All earth electrodes in surrounding are equal to the distance between the earth electrode of centre;

Described earth electrode, comprises well body, earth electrode and auxiliary packing material, and earth electrode is located in well body, and middle employing assists packing material to fill; The degree of depth of each well body is 1.5 ~ 5 meters;

Connection between described earth electrode is interconnected by conductor under thin solum; Described grounding lead is reached the standard grade from being positioned at middle earth electrode and is drawn.