Since the second industrial revolution, we humans have entered the electrical age. The use of electricity runs through all aspects of our lives, but it has also brought us a lot of trouble, so we Always looking for ways to use electricity more safely. Today the editor will introduce to you an item, which is a resistance reducing agent. Speaking of resistance reducing agents, I think most people will feel unfamiliar with them, but they are used in many aspects of our lives, ranging from lightning protection projects, railway and highway construction, national defense and military engineering, cathode anti-corrosion projects, etc., to small ones. Household electricity consumption. Resistance reducer is a good conductor and is of great use in our lives. It is particularly important for us to understand how to use drag reducing agents accurately and quickly. If you have such needs, let us learn how to use resistance reducing agents!
Advantages of resistance reducing agents
Resistance reducing agents can reduce the construction workload and can Use less grounding bodies, especially horizontal grounding bodies that are difficult to construct in place of vertical grounding bodies (in mountainous and rocky areas, etc.). It is easy to construct, can solve the difficulty of limited construction sites, can save a large amount of metal materials, has long-term effectiveness and stability, and has good anti-corrosion performance. Less affected by climate. The overall technical and economic performance is good.
Uses of drag reducing agents
Drag reducing agents have a wide range of uses and are used in various fields of the national economy. It is used in electrical grounding devices in electric power, telecommunications, construction, radio, television, railways, highways, aviation, water transportation, national defense industry, metallurgical mining, coal, petroleum, chemical industry, textile, medicine and health, culture and education and other industries.
Amount of drag reducing agent
How to calculate the amount of drag reducing agent: 1. Drag reducing agent, water = 1:0.8-1, mix thoroughly and stir into a slurry. 2. Wet the dug grounding holes and trenches with water. 3. Use the adjusted resistance reducing agent to tightly wrap each grounding body of the ground network. The thickness of the thinnest part of the resistance reducing agent should not be less than 7-10cm. Pay special attention to wrapping the welding points tightly. After solidification, compact the backfill soil layer by layer. That’s it. During construction, fine soil should be backfilled around the grounding body. Construction waste such as bricks and stones is strictly prohibited from being used as backfill soil. When conditions are poor, fine soil can only be backfilled and compacted around the grounding body. There are no strict requirements for backfilling fine soil in the upper layer.
How to use resistance reducing agent
1. Pre-installation inspection items and requirements:
(1) The resistance reducing agent should be of the same brand and model.
(2) The water used is pollution-free, and there is no sediment or other debris in the water.
(3) The size and shape of the grooves and holes meet the design requirements, the four walls are relatively flat, and there are no debris in the holes and grooves.
(4) The vertical ground pole is placed in the center of the hole, and the horizontal ground pole is centered horizontally. The distance from the bottom of the trench is not less than 40mm and is relatively uniform (it can be fixed with a thin wire if necessary).
(5) The grounding down conductor has been painted with anti-rust paint according to the design requirements and has initially set.
2. Prepare the resistance reducing agent
According to water: resistance reducing agent = 0.4, add water according to the weight ratio of 1.0:1.0 and stir thoroughly until it becomes sticky. The amount of water used for horizontal grounding is just enough to wet all the dry powder and stir it into a paste. The amount of water added for the resistance reducing agent for vertical grounding holes should be higher depending on the situation.
3. Watering, coating and initial inspection
Gently pour the prepared paste resistance reducing agent (to prevent mud, rocks and debris from being mixed into the resistance reducing agent) The grounding trench and the hole should be completely covered with the grounding electrode, and the initial thickness of the coating should not be less than 40mm. The four walls of the drilled hole should be sufficient. If there is any shortage, it should be replenished.
4. Re-inspection and backfilling and compaction
After the resistance-reducing agent has initially set, check the resistance-reducing agent in detail. The surface should be uniform, without omissions, and without debris mixed in. The coating should be The thickness at the thinnest part should be no less than 40mm. If it is insufficient, resistance reducing agent should be added. After the inspection is correct, remove the fixed thin wire and gently backfill with fine soil without hard objects and branches to a thickness of more than 20mm. Then add other soil and compact it. The surface of the compacted backfill soil should be slightly higher than the surrounding ground level.
5. Requirements for grounding down conductors
The entire ground junction section of the grounding down conductor needs to be painted with 2 to 3 coats of epoxy bitumen paint, FVC paint or other durable paint. The length of the underground section should be such that the part buried in the resistance reducing agent is not shorter than 20mm, and the length of the upper part of the ground is not shorter than 30mm.
6. Deep well grounding
Deep well grounding is sometimes necessary. Usually the depth of the well is determined by finding a formation with low resistivity or groundwater. It is usually tens of meters long. Special machinery is used during construction. Drill holes with a diameter of 80~150mm. Sometimes it is necessary to use local blasting to loosen the surrounding soil so that the drag-reducing agent can be fully filled to expand the drag-reducing effect. Use pressure to inject the prepared resistance-reducing agent into the ground electrode tube. Through the wall hole, the resistance-reducing agent surrounds the steel pipe from both inside and outside and enriches the entire borehole.
Packaging and storage:
1. This product is double-packed, with the inner layer being a PVC bag and the outer layer being a woven bag. 25KG per bag, 40 bags per ton.
2. The product name, model, and factory name are marked on the woven bag. During transportation, pay attention to preventing rain, moisture, and hard objects from damaging the packaging.
3. The resistance reducing agent should be stored in a place that is protected from rain and flooding, and measures should be taken to prevent rain and exposure when stored outdoors.
4. Under normal circumstances, the storage period is two years. When the construction site is abnormally wet by rain, it should be used within 2 days. The resistance reducing agent soaked in water can be used as fine soil backfill.
5. Users should strictly follow the usage methods to ensure that the resistance reducing agent achieves the best resistance reducing effect.
Manufacturers of resistance reducing agents
1. Qingdao Anda Lightning Protection Technology Co., Ltd.
This company is mainly engaged in the production of lightning protection grounding resistance reducing materials and lightning protection products Development, research and production work, independently developed and produced "Anda brand" physical long-lasting resistance reducing agent and low resistance grounding module. The company has successively won the honorary titles of "Quality and Reputation Double Guarantee Demonstration Unit" and "Top Ten Integrity Enterprises with Reliable Quality and Customer Satisfaction".
2. Guangxi Dikai Technology Co., Ltd.
Founded in 1989, the company is currently one of the top companies in China's mine protection industry and has nationally recognized (CNAS) experiments. room. The company has continued to innovate in science and technology over the years, and has been awarded the Guangxi District-level Enterprise Technology Center and the Guangxi District-level Patent Pilot Enterprise. Various R&D technologies and products have won more than 50 national patents, and its products have obtained the European Union's CE certification for safe production. The Dikai resistance reducing agent produced by this company is also a common resistance reducing agent on the market.
3. Qingdao Haixing Lightning Protection Technology Co., Ltd.
Qingdao Haixing Lightning Protection Technology Co., Ltd. is located in Pingdu, Qingdao, the famous hometown of graphite in China. The company mainly produces electrical resistance reducing agents, resistance reducing modules, expanded graphite, ultrafine graphite, medium and high carbon graphite and other products. The products it produces have won many honorary titles such as "Quality Products" nationwide, and have been praised by the same industry!
4. Changsha Lei Lixing Electronic Technology Co., Ltd.
Changsha Lei Lixing Electronic Technology Co., Ltd. is a high-tech enterprise integrating R&D, production and sales of lightning protection products. It is headquartered in the beautiful star city of Changsha. The company has brought together the first-class lightning protection product R&D engineers in the country to continuously launch new products and maintain its leading position in domestic technology. It is an ISO9001:2000 international quality system certified enterprise and its representative product is Lecostar resistance reducing agent.