The resistance-reducing agent consists of various components, including fine graphite, bentonite, curing agent, lubricant, and conductive cement. These raw materials are mainly concentrated in Hunan.
It is a good electrical conductor. It is used between the grounding body and the soil. On the one hand, it can be in close contact with the metal grounding body to form a sufficiently large current flow surface. On the other hand, it can penetrate the surrounding soil and reduce the surrounding area. The soil resistivity forms a flat, low-resistance region around the ground.
Resistance reducing agents are widely used in various fields of the national economy. It is used in electrical grounding devices in electric power, telecommunications, construction, broadcasting, television, railways, highways, aviation, water transport, military defense, metallurgy and mining, coal, petroleum, chemical, textile, pharmaceutical, health, culture and education industries.
The resistance-reducing agent can reduce the construction workload and can reduce the number of grounding bodies. In particular, horizontal grounding bodies can be used instead of vertical grounding bodies that are difficult to construct (in mountain areas, rocky areas, etc.). The construction is convenient, and it can solve the difficulty of the construction site. It can save a lot of metal materials, have long-term effect and stability, and have good anti-corrosion performance. Less affected by climate. Comprehensive technical economy and so on.
The choice of resistance-reducing agent depends on the actual situation to select a suitable resistance-reducing product. The most common resistance-reducing agents are chemical resistance-reducing agents and physical resistance-reducing agents.
When choosing:
1. (Quality) qualified resistance-reducing products are tested by relevant national testing departments, and all technical indicators fully comply with the requirements of China's current "Interim Technical Requirements for Grounding Resistance-Reducing Agents".
2. (Packing) This product is a double-layered package with a PVC bag inside and a woven bag outside.
3, (mark) woven bag marked with the product name, model, factory name.
4, (transport) transportation should pay attention to rain, moisture, anti-hard goods damage packaging.
5. The (storage) resistance-reducing agent should be stored in locations free from rain and water. Outdoor storage must have rain, anti-exposure measures. As long as it is not opened and damaged without packaging, and it is not flooded, its shelf life is two years. When rainwater is soaked in the construction site, it should be used within 2 days. The water-reduced resistance-reducing agent can be used as a backfill for fine soil.
6. Use of resistance-reducing agents: The following are the two most commonly used conditions;
(1) Earthing resistance of the grounding device to reduce the working ground, protective grounding, lightning protection grounding, anti-static grounding, and anti-interference grounding;
(2) To improve the quality of the device and extend its service life. Suitable for grounding of towers of power plants, substation grounding grids, power and communication lines, lightning protection and anti-interference grounding of various types of weak electrical equipment, oil depots, storage tanks and other flammable and explosive materials storage and production sites. Grounding.
7. The amount of resistance-reducing agent The economic usage of resistance-reducing agent should be determined according to different soils. The thickness of the laying on the grounding body should be between 5-15cm. For the convenience of calculation, the recommended dosage is as follows: Soil resistivity Ω· m dosage kg/m grounding form Ï≤500500<Ï≤10001000<Ï≤2000Ï>2000 level-3030-35 vertical-3232-5 1) Prior inspection items and requirements: 1 The resistance reducing agent should be the same brand, model product. 2 The water is clear and free from pollution, and there is no sediment or other debris in the water. The size and shape of the 3 furrows and holes are in line with the design requirements. The walls are flat and there are no debris in the holes and grooves. 4 The vertical grounding electrode is placed in the center of the hole. The horizontal grounding electrode is horizontally centered, and the distance from the bottom of the trench is not less than 40 mm and is even (if necessary, it can be fixed with a thin wire). 5 The ground lead has been painted according to design requirements anti-rust paint and has been the initial setting.
2) Modulation resistance reducer Add water at a weight ratio of water:reducing agent=0.4-0.6:1.0 and mix thoroughly until it becomes sticky. The level of grounding water is just enough to wet the entire dry powder and stir it into a paste. The vertical grounding hole can be filled with water with a resistance reducing agent in a high value. Excessive water addition will extend construction time.
3) Watering, coating, and initial inspection Gently pour in the prepared paste-like resistance-reducing agent (to prevent debris and debris from being mixed with the resistance-reducing agent) and cover the grounding hole and hole until it is completely covered and grounded. Pole, and the initial test coating thickness is not less than 40mm, borehole wall is full, when insufficient to add.
4) After re-inspection and backfill, after the preliminary coagulation of the agent to be reduced, check in detail that the surface of the drag reducer should be uniform, fully omit, and free from impurities. The thinnest part of the coating body should be no less than 40mm. Added resistance reducing agent. After checking, remove the fixed thread and gently backfill the fine soil with no hard objects and branches. The thickness should reach 20mm or more, then add other soil and compact it. The surface of the backfill soil after compaction should be slightly higher than the surrounding ground level.
5) The requirements for the ground lead wire grounding deflector should be painted at the surface junction of the entire section of 2 to 3 epoxy bituminous paint, FVC paint or other durable paint, the length of the underground section should be buried part of the resistance reducing agent is not Shorter than 20mm, the length of the upper part of the surface is not shorter than 30mm.
6) Deep well grounding Deep well grounding is sometimes required. Usually the well depth is determined by the formation or groundwater with low resistivity, which is usually tens of meters. During construction, special machinery is used for drilling and the hole diameter is 80-150mm. Sometimes it is accompanied by partial blasting to loosen the surrounding soil to fill in the drag reducer and expand the resistance reducing effect. The ground electrode is drilled with steel pipes of Φ10 to 15mm through holes on four walls. The prepared pressure-reducing agent is injected into the tube by pressure, and the resistance-reducing agent surrounds the steel tube from both the inside and outside and fills the entire borehole through the wall hole.
The well-known brands of resistance-reducing agents currently on the market include: Anda anti-radar and anti-reduction agents, grounding resistance-reducing agents, Xinke Fangzheng resistance-reducing agent, Bondey long-lasting physical resistance-reducing agent, and Fang Lei. Resistance Reducing Agents, Dikai Resistance Reducing Agents, KBTE Corticoids Resistance Reducing Agents, Xinke Resistance Reducing Agents, Nanjing Tangshan Resistance Reducing Agents, Human Pass Resistance Reducing Agents, Reiko Star Reducing Agents.
It is a good electrical conductor. It is used between the grounding body and the soil. On the one hand, it can be in close contact with the metal grounding body to form a sufficiently large current flow surface. On the other hand, it can penetrate the surrounding soil and reduce the surrounding area. The soil resistivity forms a flat, low-resistance region around the ground.
Resistance reducing agents are widely used in various fields of the national economy. It is used in electrical grounding devices in electric power, telecommunications, construction, broadcasting, television, railways, highways, aviation, water transport, military defense, metallurgy and mining, coal, petroleum, chemical, textile, pharmaceutical, health, culture and education industries.
The resistance-reducing agent can reduce the construction workload and can reduce the number of grounding bodies. In particular, horizontal grounding bodies can be used instead of vertical grounding bodies that are difficult to construct (in mountain areas, rocky areas, etc.). The construction is convenient, and it can solve the difficulty of the construction site. It can save a lot of metal materials, have long-term effect and stability, and have good anti-corrosion performance. Less affected by climate. Comprehensive technical economy and so on.
The choice of resistance-reducing agent depends on the actual situation to select a suitable resistance-reducing product. The most common resistance-reducing agents are chemical resistance-reducing agents and physical resistance-reducing agents.
When choosing:
1. (Quality) qualified resistance-reducing products are tested by relevant national testing departments, and all technical indicators fully comply with the requirements of China's current "Interim Technical Requirements for Grounding Resistance-Reducing Agents".
2. (Packing) This product is a double-layered package with a PVC bag inside and a woven bag outside.
3, (mark) woven bag marked with the product name, model, factory name.
4, (transport) transportation should pay attention to rain, moisture, anti-hard goods damage packaging.
5. The (storage) resistance-reducing agent should be stored in locations free from rain and water. Outdoor storage must have rain, anti-exposure measures. As long as it is not opened and damaged without packaging, and it is not flooded, its shelf life is two years. When rainwater is soaked in the construction site, it should be used within 2 days. The water-reduced resistance-reducing agent can be used as a backfill for fine soil.
6. Use of resistance-reducing agents: The following are the two most commonly used conditions;
(1) Earthing resistance of the grounding device to reduce the working ground, protective grounding, lightning protection grounding, anti-static grounding, and anti-interference grounding;
(2) To improve the quality of the device and extend its service life. Suitable for grounding of towers of power plants, substation grounding grids, power and communication lines, lightning protection and anti-interference grounding of various types of weak electrical equipment, oil depots, storage tanks and other flammable and explosive materials storage and production sites. Grounding.
7. The amount of resistance-reducing agent The economic usage of resistance-reducing agent should be determined according to different soils. The thickness of the laying on the grounding body should be between 5-15cm. For the convenience of calculation, the recommended dosage is as follows: Soil resistivity Ω· m dosage kg/m grounding form Ï≤500500<Ï≤10001000<Ï≤2000Ï>2000 level-3030-35 vertical-3232-5 1) Prior inspection items and requirements: 1 The resistance reducing agent should be the same brand, model product. 2 The water is clear and free from pollution, and there is no sediment or other debris in the water. The size and shape of the 3 furrows and holes are in line with the design requirements. The walls are flat and there are no debris in the holes and grooves. 4 The vertical grounding electrode is placed in the center of the hole. The horizontal grounding electrode is horizontally centered, and the distance from the bottom of the trench is not less than 40 mm and is even (if necessary, it can be fixed with a thin wire). 5 The ground lead has been painted according to design requirements anti-rust paint and has been the initial setting.
2) Modulation resistance reducer Add water at a weight ratio of water:reducing agent=0.4-0.6:1.0 and mix thoroughly until it becomes sticky. The level of grounding water is just enough to wet the entire dry powder and stir it into a paste. The vertical grounding hole can be filled with water with a resistance reducing agent in a high value. Excessive water addition will extend construction time.
3) Watering, coating, and initial inspection Gently pour in the prepared paste-like resistance-reducing agent (to prevent debris and debris from being mixed with the resistance-reducing agent) and cover the grounding hole and hole until it is completely covered and grounded. Pole, and the initial test coating thickness is not less than 40mm, borehole wall is full, when insufficient to add.
4) After re-inspection and backfill, after the preliminary coagulation of the agent to be reduced, check in detail that the surface of the drag reducer should be uniform, fully omit, and free from impurities. The thinnest part of the coating body should be no less than 40mm. Added resistance reducing agent. After checking, remove the fixed thread and gently backfill the fine soil with no hard objects and branches. The thickness should reach 20mm or more, then add other soil and compact it. The surface of the backfill soil after compaction should be slightly higher than the surrounding ground level.
5) The requirements for the ground lead wire grounding deflector should be painted at the surface junction of the entire section of 2 to 3 epoxy bituminous paint, FVC paint or other durable paint, the length of the underground section should be buried part of the resistance reducing agent is not Shorter than 20mm, the length of the upper part of the surface is not shorter than 30mm.
6) Deep well grounding Deep well grounding is sometimes required. Usually the well depth is determined by the formation or groundwater with low resistivity, which is usually tens of meters. During construction, special machinery is used for drilling and the hole diameter is 80-150mm. Sometimes it is accompanied by partial blasting to loosen the surrounding soil to fill in the drag reducer and expand the resistance reducing effect. The ground electrode is drilled with steel pipes of Φ10 to 15mm through holes on four walls. The prepared pressure-reducing agent is injected into the tube by pressure, and the resistance-reducing agent surrounds the steel tube from both the inside and outside and fills the entire borehole through the wall hole.
The well-known brands of resistance-reducing agents currently on the market include: Anda anti-radar and anti-reduction agents, grounding resistance-reducing agents, Xinke Fangzheng resistance-reducing agent, Bondey long-lasting physical resistance-reducing agent, and Fang Lei. Resistance Reducing Agents, Dikai Resistance Reducing Agents, KBTE Corticoids Resistance Reducing Agents, Xinke Resistance Reducing Agents, Nanjing Tangshan Resistance Reducing Agents, Human Pass Resistance Reducing Agents, Reiko Star Reducing Agents.