CN112310774A - Lightning protection grounding device and implementation method thereof - Google Patents
Lightning protection grounding device and implementation method thereof Download PDFInfo
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- CN112310774A CN112310774A CN202011190590.0A CN202011190590A CN112310774A CN 112310774 A CN112310774 A CN 112310774A CN 202011190590 A CN202011190590 A CN 202011190590A CN 112310774 A CN112310774 A CN 112310774A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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Abstract
The invention belongs to the technical field of lightning protection grounding. Specifically, the invention provides a lightning protection grounding device implementation method, which comprises the following steps: 1) digging a groove at the grounding position, and uniformly coating a pretreating agent on the bottom of the groove; 2) placing a grounding wire on the pretreating agent, and pouring a first composite backfill material above the pretreating agent; 3) covering the grounding wire with a second composite backfill material, and finally backfilling the groove with clay and tamping; wherein the pretreating agent is sodium polyacrylate water-absorbing particles; the first composite backfill material is a diammonium phosphate aqueous solution; the second composite backfill is a mixture of bentonite and water. In addition, the invention also provides a lightning protection grounding device manufactured by the implementation method of the lightning protection grounding device. The method is implemented aiming at the equipment such as the power transmission line and the base station with high soil resistivity, the moisture is absorbed by special materials, and the moisture in the grounding ditch is prolonged by special means, so that the lightning protection and corrosion resistance can be effectively realized.
Description
Technical Field
The invention belongs to the technical field of lightning protection of power transmission lines, and particularly relates to a lightning protection grounding device and an implementation method thereof.
Background
The lightning damage of 110kV and above transmission lines in China mainly occurs in mountainous areas. In recent years, with the change of natural conditions, lightning trip accidents of 110kV lines in China have a remarkable trend of rising, and particularly in high-altitude areas, few-people areas and unmanned areas, great difficulty is brought to line hunting, maintenance, overhaul and the like. The grounding device of the power system is one of important measures for maintaining the safe and reliable operation of the power system and ensuring the safety of equipment and operating personnel.
The grounding resistance R of the grounding grid consists of four parts: the resistance of the grounding down lead, the resistance of the grounding body of the grounding network, the contact resistance of the grounding body and the surrounding soil, and the current dissipation resistance of the soil surrounding the grounding body, wherein the current dissipation resistance of the soil is dominant. The traditional grounding device is difficult to fall below the national grid standard requirement, and in addition, China belongs to acid rain zones, and the corrosivity is strong, so that the corrosion of a grounding body is accelerated, and the service life is short.
Therefore, developing new grounding materials and lightning protection grounding devices to meet the requirements of lightning protection grounding and corrosion resistance and make the grounding system safer and more reliable is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an implementation method of a lightning protection grounding device, aiming at equipment such as a power transmission line and a base station with high soil resistivity, the lightning protection grounding device absorbs moisture through a special material, prolongs the moisture in a grounding ditch through a special means, and increases conductivity to reduce the resistivity. The high-efficiency resistance-reducing soil treatment agent treats the soil surface into a permeation channel and can lock water; the high-efficiency resistance-reducing backfill is tightly combined with surrounding soil to form a compact conductive film, so that the contact area is increased, and the conductivity is improved; the electrode unit can increase the contact area with the surrounding soil, improve the conductivity of the soil and reduce the resistance of the grounding device.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an implementation method of a lightning protection grounding device comprises the following steps:
1) digging a groove at the grounding position, and uniformly coating a pretreating agent on the bottom of the groove;
2) placing a grounding wire on the pretreating agent coating, and pouring a first composite backfill material above the pretreating agent coating;
3) covering the grounding wire with a second composite backfill material, and finally backfilling the groove with clay and tamping;
wherein the pretreating agent is sodium polyacrylate water-absorbing particles; the first composite backfill is a resistance reducing material aqueous solution; the second composite backfill is a mixture of bentonite and water.
On the basis of the technical scheme, the invention can further have the following specific selection or optimized selection.
Specifically, the groove is 0.8-1.2 meters deep, 0.4-0.6 meters wide at the bottom, 0.6-1 meters wide at the top and 6-8 meters long.
Specifically, the filling height of the pretreatment agent coating is 3-5cm, the filling height of the first composite backfill material is 4-8cm, and the filling height of the second composite backfill material is 10-30 cm.
Specifically, in the step 2), the side wall of the groove is uniformly coated with the first composite backfill material.
Specifically, the sodium polyacrylate water-absorbing particles are prepared by adopting the following method: the sodium polyacrylate and the water are stirred and mixed in a weight ratio of 1:25 until the water is completely absorbed. The unique moisture absorption and preservation formula of the water-absorbing resin utilizes the capillary and gel principle, has strong self-moisture preservation capability, can absorb the water in the soil and improve the humidity of the surrounding soil in the drought season.
Specifically, the resistance reducing material aqueous solution is prepared by the following method: the resistance reducing material and water are stirred and mixed according to the weight portion ratio of 1:25, wherein the resistance reducing material is selected from one of diamine phosphate, potassium nitrate, trisodium phosphate, potassium sulfate or sodium pyrophosphate. The resistance reducing material is environment-friendly and superconductive, replaces the traditional graphite and conductive carbon black layer, and is lower in cost.
Specifically, the mixture of bentonite and water is prepared by the following method: the bentonite and water are stirred and mixed according to the weight portion ratio of 1: 25. Wherein the bentonite has the granularity of 400 meshes, the PH value of 6-8 and the montmorillonite content of more than or equal to 90 percent.
It should be noted that the pre-treatment agent coated in the grooves rapidly forms a film, thereby allowing the first composite backfill material in liquid form to be poured into the grooves and the side walls of the grooves. The grounding device is a general name of a grounding wire and a grounding body. The grounding wire has various specifications and forms and is purchased from commercial products. For example, a slow release type ground device pole tube: the high-quality copper steel material is adopted, and the corrosion resistance is excellent and the resistivity is extremely low. The upper end and the lower end of the polar tube are respectively provided with a moisture absorption hole and an ion release hole. One end of the ring is provided with a discharge ring: the annular radiator effectively increases the grounding area of the device, improves the drainage capacity of the device and reduces the chance of forming eddy currents.
In addition, the invention also provides a lightning protection grounding device manufactured by the implementation method of the lightning protection grounding device.
Compared with the prior art, the invention has the beneficial effects that: the lightning protection grounding device is implemented aiming at equipment such as a power transmission line and a base station with high soil resistivity, the lightning protection grounding device absorbs moisture through special materials and prolongs the moisture in a grounding ditch through special means, wherein the soil pretreatment agent treats the surface of soil into a permeation channel and can lock the moisture; the composite backfill material-I is tightly combined with surrounding soil to form a compact conductive film, so that the contact area is increased; the composite backfill material-II tightly wraps the grounding wire, so that the contact resistance with soil is reduced, and the drainage area is increased; the composite material in the grounding wire releases conductive ions into the surrounding soil, so that the conductivity of the soil is improved, and the resistance of the grounding device is reduced.
Drawings
FIG. 1 is a schematic view of a vertical longitudinal cross-sectional configuration of the present invention;
fig. 2 is a schematic view of the cross-sectional structure in the vertical direction of the present invention.
In the figure: 1-pretreating agent, 2-first composite backfill, 3-second composite backfill, 4-clay and 5-grounding wire.
Detailed Description
For a better understanding of the present invention, the following further illustrates the present invention with reference to the accompanying drawings and specific examples, but the present invention is not limited to the following examples.
Example 1:
as shown in fig. 1, the present invention provides a lightning protection grounding device, which is manufactured by the following implementation method,
1) and digging a groove at the grounding position, wherein the depth of the groove is 0.8 meter, the width of the bottom of the groove is 0.5 meter, the width of the top of the groove is 0.6 meter, and the length of the groove is 6 meters. Then evenly coat the pretreating agent to the ditch groove bottom, the filling height of pretreating agent is 3cm, the pretreating agent is sodium polyacrylate granule that absorbs water, and wherein sodium polyacrylate is more than or equal to 99% as the water retaining agent purity, uses huadi brand industrial grade to the sodium polyacrylate water retaining agent: mixing the aqueous solution at a ratio of 1:25, putting the mixture into a barrel, stirring until the water is completely absorbed, and obtaining the pretreating agent after the sodium polyacrylate particles fully absorb water and swell.
2) Placing the earth connection on the pretreating agent, to water first compound backfill material above the pretreating agent, the filling height of first compound backfill material is 4cm, the lateral wall of the groove is uniformly coated with the first compound backfill material. The first composite backfill is a diammonium phosphate aqueous solution, a Yuntanghua brand diammonium phosphate fertilizer is used, the granularity is 95, and the contents of components in diammonium phosphate are as follows: n is more than or equal to 18 percent, P is more than or equal to 46 percent, water is less than or equal to 0.2 percent, and the weight percentage of diammonium phosphate: the water solution is mixed and stirred evenly according to the proportion of 1:20 and then is put into a barrel.
3) Covering the grounding wire with a second composite backfill material, finally backfilling the groove with clay and tamping, wherein the second composite backfill material is a mixture of bentonite and water, the filling height of the second composite backfill material is 10cm, the Guangdong tablet water-based high-transparency organic bentonite is used, the granularity is 400 meshes, the PH value is 6, and the montmorillonite is more than or equal to 90 percent and is formed by bentonite: and (3) mixing the aqueous solution at a ratio of 1:20, fully stirring, and filling into a barrel to prepare the second backfill material.
Example 2:
as shown in fig. 1, the present invention provides a lightning protection grounding device, which is manufactured by the following implementation method,
1) and digging a groove at the grounding position, wherein the groove is 1 meter deep, 0.4 meter wide at the bottom, 0.1 meter wide at the top and 8 meters long. And then uniformly coating a pretreating agent on the bottom of the groove, wherein the filling height of the pretreating agent is 5cm, the pretreating agent is sodium polyacrylate water-absorbing particles, the purity of the sodium polyacrylate as a water-retaining agent is more than or equal to 99%, and the industrial grade Huadi brand is used to contain the sodium polyacrylate water-retaining agent: mixing the aqueous solution at a ratio of 1:25, putting the mixture into a barrel, stirring until the water is completely absorbed, and obtaining the pretreating agent after the sodium polyacrylate particles fully absorb water and swell.
2) Placing the earth connection on the pretreating agent, to water first compound backfill material above the pretreating agent, the filling height of first compound backfill material is 8cm, the lateral wall of the groove is uniformly coated with the first compound backfill material. The first composite backfill material is diammonium phosphate aqueous solution, potassium Epipropa sulfate is used, the particle size is 10-20 meshes, and the content of the components in the potassium sulfate is as follows: K2O is more than or equal to 52%, S is more than or equal to 17.5%, CL is less than or equal to 1.5%, potassium sulfate: the water solution is mixed and stirred evenly according to the proportion of 1:15 and then is put into a barrel.
3) Covering the grounding wire with a second composite backfill material, finally backfilling the groove with clay and tamping, wherein the second composite backfill material is a mixture of bentonite and water, the filling height of the second composite backfill material is 30cm, the Guangdong tablet water-based high-transparency organic bentonite is used, the granularity is 400 meshes, the PH value is 6, and the montmorillonite is more than or equal to 90 percent and is formed by mixing bentonite: and (3) mixing the aqueous solution at a ratio of 1:20, fully stirring, and filling into a barrel to prepare the second backfill material.
Example 3:
as shown in fig. 1, the present invention provides a lightning protection grounding device, which is manufactured by the following implementation method,
1) and digging a groove at the grounding position, wherein the depth of the groove is 1.2 meters, the width of the bottom of the groove is 0.6 meter, the width of the top of the groove is 0.8 meter, and the length of the groove is 7 meters. And then uniformly coating a pretreating agent on the bottom of the groove, wherein the filling height of the pretreating agent is 4cm, the pretreating agent is sodium polyacrylate water-absorbing particles, the purity of the sodium polyacrylate as a water-retaining agent is more than or equal to 99%, and the industrial grade Huadi brand is used to contain the sodium polyacrylate water-retaining agent: mixing the aqueous solution at a ratio of 1:25, putting the mixture into a barrel, stirring until the water is completely absorbed, and obtaining the pretreating agent after the sodium polyacrylate particles fully absorb water and swell.
2) Placing the earth connection on the pretreating agent, to water first compound backfill material above the pretreating agent, the filling height of first compound backfill material is 7cm, the lateral wall of the groove is uniformly coated with the first compound backfill material. The first compound backfill is a trisodium phosphate aqueous solution, a Jiaxin brand trisodium phosphate fertilizer is used, the content is more than 98%, the pH value of a 1% aqueous solution is 12.1, and the weight ratio of trisodium phosphate: the water solution is mixed and stirred evenly according to the proportion of 1:30 and then is put into a barrel.
3) Covering the grounding wire with a second composite backfill material, finally backfilling the groove with clay and tamping, wherein the second composite backfill material is a mixture of bentonite and water, the filling height of the second composite backfill material is 20cm, the Guangdong tablet water-based high-transparency organic bentonite is used, the granularity is 400 meshes, the PH value is 6, and the montmorillonite is more than or equal to 90 percent and is formed by bentonite: and (3) mixing the aqueous solution at a ratio of 1:20, fully stirring, and filling into a barrel to prepare the second backfill material.
The lightning protection grounding device provided by the embodiment of the invention has the following advantages:
(1) high conductivity, reasonable formula, rich active ions and capability of improving the environment with high soil resistivity. (2) The corrosion resistance is excellent: the composite corrosion inhibitor is added, so that the steel and the copper are well protected against corrosion. (3) Moisture absorption and retention performance: the unique moisture absorption and preservation formula utilizes capillary pores and a gel principle, has strong self-moisture preservation capability, can absorb water in soil, and improves the humidity of the surrounding soil in a drought season. (4) And (3) slowly releasing ions: by adopting the slow release technology, when the soil is dry, the moisture and the ions are slowly released to the surrounding soil, the process is very slow, the condition that the ions improve the soil too fast is avoided, and the resistivity of the soil basically maintains a balance value. (5) Safety and environmental protection: the product does not contain organic matters, mercury, chromium and other heavy metals, has no influence on water resources and vegetation, and is safe and environment-friendly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. An implementation method of a lightning protection grounding device is characterized by comprising the following steps:
1) digging a groove at the grounding position, and uniformly coating a pretreating agent on the bottom of the groove;
2) placing a grounding wire on the pretreating agent coating, and pouring a first composite backfill material above the pretreating agent coating;
3) covering the grounding wire with a second composite backfill material, and finally backfilling the groove with clay and tamping;
wherein the pretreating agent is sodium polyacrylate water-absorbing particles; the first composite backfill is a resistance reducing material aqueous solution; the second composite backfill is a mixture of bentonite and water.
2. The method of claim 1, wherein the lightning protection grounding device comprises: the groove is 0.8-1.2 m deep, 0.4-0.6 m wide at the bottom, 0.6-1 m wide at the top and 6-8 m long.
3. The method of claim 1, wherein the lightning protection grounding device comprises: the thickness of the pretreatment agent coating is 3-5cm, the filling height of the first composite backfill material is 4-8cm, and the filling height of the second composite backfill material is 10-30 cm.
4. The method of claim 1, wherein the lightning protection grounding device comprises: in the step 2), the side wall of the groove is uniformly coated with the first composite backfill material.
5. The method for implementing a lightning protection grounding device according to any one of claims 1 to 4, wherein: the sodium polyacrylate water-absorbing particles are prepared by the following method: the sodium polyacrylate and the water are stirred and mixed in a weight ratio of 1:25 until the water is completely absorbed.
6. The method of claim 5, wherein the lightning protection grounding device comprises: the resistance reducing material aqueous solution is prepared by the following method: the resistance reducing material and water are stirred and mixed according to the weight portion ratio of 1:10-40, wherein the resistance reducing material is selected from one of diamine phosphate, potassium nitrate, trisodium phosphate, potassium sulfate or sodium pyrophosphate.
7. The method of claim 5, wherein the lightning protection grounding device comprises: the mixture of bentonite and water is prepared by the following method: the bentonite and water are stirred and mixed according to the weight portion ratio of 1: 25.
8. The method of claim 7, wherein the lightning protection grounding device comprises: the bentonite has the granularity of 400 meshes, the PH value of 6-8 and the montmorillonite content of more than or equal to 90 percent.
9. A lightning protection grounding device characterized in that it is made by the method of implementation of a lightning protection grounding device according to any one of claims 1 to 8.
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| US20100224385A1 (en) * | 2009-03-03 | 2010-09-09 | Musco Corporation | Apparatus, method, and system for grounding support structures using an integrated grounding electrode |
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| CN202076426U (en) * | 2011-06-28 | 2011-12-14 | 内蒙古电力勘测设计院 | Grounding device of tower |
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