CN219040751U

CN219040751U - Nonmetal earthing device for improving earthing resistance

Info

Publication number: CN219040751U
Application number: CN202223228973.XU
Authority: CN
Inventors: 黄峥; 马建琳; 毛世宇; 喻泉; 李河; 唐泊
Original assignee: Sichuan Chuanguo Environmental Protection Engineering Co ltd; Shengyuan Xianfeng Chengdu Environmental Protection Technology Co ltd
Current assignee: Sichuan Chuanguo Environmental Protection Engineering Co ltd; Shengyuan Xianfeng Chengdu Environmental Protection Technology Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-16
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses a nonmetal grounding device for improving grounding resistance, which comprises a horizontal grounding body and a nonmetal grounding module; the nonmetal grounding module comprises a graphite body and an electrode core, the electrode core is connected with a horizontal grounding body, the horizontal grounding body comprises an outer frame and a branch line steel plate, the nonmetal grounding modules are arranged into a honeycomb structure and are installed in an area formed by the outer frame, and two ends of the branch line steel plate are respectively connected with the nonmetal grounding modules. According to the utility model, the nonmetal grounding module adopts a honeycomb type mounting structure, more nonmetal grounding modules can be mounted in a unit area under the condition of meeting the mounting interval, the current dispersion capacity of the grounding body can be increased, the grounding resistance between the grounding body and soil can be reduced, and the soil resistivity near the grounding module can be reduced.

Description

Nonmetal earthing device for improving earthing resistance

Technical Field

The utility model relates to the technical field of high-voltage grounding leakage, in particular to a nonmetal grounding device for improving grounding resistance.

Background

The building or the important equipment is subjected to grounding treatment when in use, and is usually completed by using a buried grounding module. For example, metal grounding poles are often used around newly added buildings as lightning grounding.

Most of the existing grounding modules are made of metal materials, under the action of lightning strike impact current, the current density of the grounding device discharged to the soil is hemispherical, and when the current density is delta, the generated electric field intensity En is high. Under the impact current, the longer the grounding body is, the longer the lightning current can be prevented from flowing to the grounding body due to the effect of the inductor, so that the lightning current cannot be uniformly diffused along the whole length of the grounding body, and therefore the length of the grounding body is controlled within a certain radius range of a leakage point. The grounding modules in the prior art are often installed in a matrix mode, and the installation space of each grounding module is required, so that the installation quantity in a unit area is limited. Secondly, the connection between the grounding module and the horizontal grounding body in the prior art is mostly welded, only the grounding module is welded, the grounding module is not fixed in other modes, the electrode core and the horizontal grounding body are directly welded during welding, the existing electrode core is flat steel, the operation is inconvenient during welding of the electrode core and the flat steel, the grounding module is buried after welding, corrosion is likely to occur, the electricity leakage effect is poor, and the grounding resistance is increased.

Disclosure of Invention

The utility model aims to provide a nonmetal grounding device for improving grounding resistance.

In order to achieve the above object, in one embodiment of the present utility model, a nonmetal grounding device for improving grounding resistance is provided, including a horizontal grounding body and a nonmetal grounding module; the nonmetal grounding module is a graphite grounding module;

the horizontal grounding body is upwards connected with a grounding grid connecting terminal, the grounding grid connecting terminal is upwards connected with a grounding underground lead, and the grounding underground lead is upwards connected with a grounding busbar;

the nonmetal grounding module comprises a graphite body and electrode cores connected to two ends of the graphite body, wherein the electrode cores are connected with the horizontal grounding body, a square connecting lug is arranged at the joint, the horizontal grounding body is embedded into the square connecting lug, a through hole is formed in the top of the square connecting lug, an elastic sheet is arranged in the square connecting lug, and a gasket and a bolt are arranged in the through hole to connect the electrode cores with the horizontal grounding body;

the horizontal grounding body comprises an outer frame and branch line steel plates, a plurality of nonmetal grounding modules are arranged into a honeycomb structure and are installed in an area formed by the outer frame, and two ends of each branch line steel plate are respectively connected with nonmetal grounding modules.

Preferably, the grounding down-lead is arranged in the PVC insulating pipeline.

In the utility model, the length of the graphite body is preferably 40 cm-50 cm, and the electrode core is made of hot dip galvanized steel.

Preferably, the buried depth of the nonmetal grounding modules is 1m when the nonmetal grounding modules are used, and the installation distance between two adjacent nonmetal grounding modules is larger than 4m.

In summary, the utility model has the following advantages:

1. the nonmetal grounding module is a graphite body, so that the problems that the metal grounding body has poor affinity in acid or alkaline soil and the surface is easy to be modified can be effectively solved; and the electric conductivity and the drainage capacity in soil with excessive organic matters are weakened.

2. According to the utility model, the nonmetal grounding module adopts a honeycomb type mounting structure, more nonmetal grounding modules can be mounted in a unit area under the condition of meeting the mounting interval, the current dispersion capacity of the grounding body can be increased, the grounding resistance between the grounding body and soil can be reduced, and the soil resistivity near the grounding module can be reduced. When the surrounding field of the building is limited, namely the installation space is limited, the occupied area required by the ground grid for burying the grounding electrode can be obviously reduced, and a better resistance reducing effect is obtained.

3. The ground resistance of the grounding body is the contact resistance of the contact surface plus the dispersion resistance, so the ground resistance of the grounding body is in a decreasing function relation with the area of the contact interface, and the dispersion resistance is determined by the soil resistivity when current flows into the soil through the ground electrode and then disperses. The nonmetal grounding module can reduce the soil resistivity near the grounding module, so that the local setting effect is stronger than that of a common metal grounding electrode. The nonmetal grounding module has the characteristics of extremely strong corrosion resistance, sustainable bearing of large current, no toxicity, no pollution to soil and the like.

4. The utility model also optimizes the connection mode between the nonmetal grounding module which is normally installed vertically and the horizontal grounding body, and the nonmetal grounding module can be reinforced by welding and bolting. And meanwhile, the welding is more convenient.

Drawings

FIG. 1 is a schematic diagram of a nonmetallic earthing device in an embodiment of the utility model;

FIG. 2 is a top view of a honeycomb structure constructed in accordance with one embodiment of the utility model;

fig. 3 is a schematic view of a loop-shaped connecting ear according to an embodiment of the present utility model.

Wherein, 1, horizontal grounding body; 2. an electrode core; 3. a graphite body; 4. a ground screen connection terminal; 5. grounding the lower lead; 6. a ground bus; 7. a connecting lug in a shape of a loop; 8. a through hole; 9. a spring plate; 10. an outer frame; 11. and (5) a branch line steel plate.

Detailed Description

The utility model provides a nonmetal grounding device for improving grounding resistance, which comprises a horizontal grounding body 1 and a nonmetal grounding module; the nonmetal grounding module is a graphite grounding module. The horizontal grounding body 1 is made of metal, and generally flat steel or steel strips are adopted from the viewpoint of cost installation, so that the welding is convenient and the contact area is increased. The graphite grounding module is a conventional product, and the use effect can be improved by adding materials such as a humectant, electrolytic ions and the like.

The horizontal grounding body 1 and the nonmetal grounding module are paved at the ground, the horizontal grounding body 1 is horizontally arranged, and the nonmetal grounding module is generally vertically arranged. The horizontal grounding body 1 is connected with a grounding grid connecting terminal 4 upwards, and the grounding grid connecting terminal can be flat steel, wherein the lower part of the grounding grid connecting terminal is buried. The ground net connecting terminal is upwards connected with a grounding underground lead 5, the upper end of the grounding underground lead is connected with a grounding busbar 6, and the lower end of the grounding underground lead is connected with the ground net connecting terminal. The grounding down lead is upwards connected with the grounding busbar, and a plurality of connection points are arranged on the grounding busbar and can be directly connected with various devices or buildings which need grounding.

The nonmetal grounding module comprises a graphite body 3 and electrode cores 2 connected to two ends of the graphite body, wherein the electrode cores 2 are made of metal, and one ends of the electrode cores 2 are directly embedded into the graphite body during production. The electrode core 2 is connected with the horizontal grounding body 1, and a connecting lug in a shape of a loop is arranged at the connecting position, so that the connection or welding is more convenient. The horizontal grounding body 1 is embedded into the square connecting lug, a through hole 8 is formed in the top of the square connecting lug, a spring piece 9 is arranged in the square connecting lug, and a gasket and a bolt are arranged in the through hole to connect the electrode core 2 with the horizontal grounding body 1. The electrode core 2 is connected with the horizontal grounding body 1 by firstly forming an angle between the square connecting lug and the horizontal grounding body 1, allowing the horizontal grounding body 1 to enter the square connecting lug, and then allowing the nonmetal grounding module to be vertically connected with the horizontal grounding body 1.

The connection of the electrode core 2 to the horizontal grounding body 1 may employ one or a combination of both of welding and bolting. The electrode core 2 portion can be operated at the time of mounting the electrode core 2, and the horizontal grounding member 1 can be operated to perform mounting even when the horizontal grounding member 1 is not fixed. After the flat steel of the horizontal grounding body 1 is clamped into the inner part of the square connecting lug 7, the flat steel is connected through bolts, and the elastic sheet can enable the horizontal grounding body 1 to have good space during installation, and also can reduce the gap between the square connecting lugs of the horizontal grounding body 1 after installation, so that welding operation is facilitated.

The horizontal grounding body 1 comprises an outer frame 10 and a branch line steel plate 11, wherein a plurality of nonmetal grounding modules are arranged in a honeycomb structure and are installed in an area formed by the outer frame, and two ends of the branch line steel plate are respectively connected with nonmetal grounding modules. The outer frame and the branch line steel plates can be made of flat steel, the length of the outer frame is longer than that of the branch line steel plates, the outer frame can be welded or connected with the nonmetal grounding modules, the nonmetal grounding modules are connected to the two ends of the support steel plates, so that a honeycomb-shaped connecting structure is formed inside the outer frame conveniently, the plurality of branch line steel plates can connect all the nonmetal grounding modules to the outer frame in parallel, the honeycomb-shaped connecting structure can be formed, and integral support can be achieved.

In the optimized embodiment of the utility model, the grounding down-lead is arranged in the PVC insulating pipeline, so that the protection and insulation effects can be realized. The length of the graphite body is 40 cm-50 cm, and the electrode core 2 is made of hot dip galvanized steel. The buried depth of the nonmetal grounding modules is 1m when the nonmetal grounding modules are used, and the installation interval of two adjacent nonmetal grounding modules is larger than 4m.

Although specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, it should not be construed as limiting the scope of protection of the present patent. Various modifications and variations which may be made by those skilled in the art without the creative effort are within the scope of the patent described in the claims.

Claims

1. A nonmetallic earthing device for improving earthing resistance, which is characterized in that: the device comprises a horizontal grounding body and a nonmetal grounding module; the nonmetal grounding module is a graphite grounding module;

the horizontal grounding body is upwards connected with a grounding grid connecting terminal, the grounding grid connecting terminal is upwards connected with a grounding down-lead, and the grounding down-lead is upwards connected with a grounding busbar;

the nonmetal grounding module comprises a graphite body and electrode cores connected to two ends of the graphite body, wherein the electrode cores are connected with the horizontal grounding body, a square connecting lug is arranged at the connecting position, the horizontal grounding body is embedded into the square connecting lug, a through hole is formed in the top of the square connecting lug, an elastic sheet is arranged in the square connecting lug, and a gasket and a bolt are arranged in the through hole to connect the electrode cores with the horizontal grounding body;

2. The nonmetallic earthing device for improving earthing resistance as set forth in claim 1, wherein: the grounding underground lead is arranged in the PVC insulating pipeline.

3. The nonmetallic earthing device for improving earthing resistance as set forth in claim 1, wherein: the length of the graphite body is 40 cm-50 cm, and the electrode core is made of hot dip galvanized steel.

4. The nonmetallic earthing device for improving earthing resistance as set forth in claim 1, wherein: the buried depth of the nonmetal grounding modules is 1m when the nonmetal grounding modules are used, and the installation distance between two adjacent nonmetal grounding modules is larger than 4m.