Lightning rodsIt is a device used to prevent buildings or other facilities from being struck by lightning, and its principle is to use the corona discharge generated by the tip of a lightning rod to release an electric charge in the air, thereby reducing the danger of lightning. Dikai TechnologyThe main types of lightning rods are as follows:
Normal lightning rod:This is the most common lightning rod, which consists of a metal rod and a connecting ground wire, the height of the metal rod is higher than the highest point of the building, and the ground wire is buried in the ground to form a closed circuit. The function of ordinary lightning rods is to direct lightning to the ground when lightning occurs, so as to avoid damage to buildings.
Discharge lightning rod:This is an improved lightning rod, which adds a discharge device on the basis of the ordinary lightning rod, and the discharge device can release the charge in the air through corona discharge or artificial discharge before lightning occurs, thereby reducing the possibility of lightning. The advantage of the discharge lightning rod is that it can actively protect the lightning and improve the lightning protection effect, but the disadvantage is that it needs to consume a certain amount of energy, and the maintenance of the discharge device is more complicated.
Passive lightning rods:This is a new type of lightning rod, it does not need any external energy source, nor does it need a discharge device, its principle is to use the shape of the lightning rod and the characteristics of the material, to enhance the corona discharge ability of the lightning rod, so as to achieve the purpose of releasing the charge in the air. The advantages of passive lightning rods are simple structure, no maintenance, energy saving and environmental protection, and the disadvantages are that the lightning protection effect is affected by the shape and material of the lightning rod, and further research and verification are needed.
The protection range of lightning rods is divided into two types: direct lightning protection and side lightning protection. Direct lightning protection means that the lightning rod can protect the building or facility where it is located from being directly hit by lightning, and side lightning protection means that the lightning rod can protect the surrounding buildings or facilities from being indirectly affected by lightning. The range of direct lightning protection can be expressed by the protection angle or protection radius of the lightning rod, and the range of side lightning protection can be expressed by the protection height or protection distance of the lightning rod. The protection range of lightning rods is related to the type, height, location, shape and other factors of lightning rods, and generally needs to be calculated and designed according to specific situations.
Dikai TechnologyLightning rods are used in a wide range of industries, such as:
Construction Industry:Buildings are the main targets of lightning, so lightning rods need to be installed to protect the structure of the building and the equipment, personnel, etc. inside. The lightning rod of the building generally adopts ordinary lightning rod or discharge lightning rod, and the type, quantity, and location of the lightning rod are selected according to the height, shape, and use of the building. The lightning protection grounding scheme of the building generally adopts annular grounding or radial grounding, which connects the ground wire of the lightning rod with the steel bars and water pipes of the building to form a low-impedance grounding system to ensure that the lightning can flow smoothly into the ground.
Communication Industry:Communication facilities are important targets for lightning because they are often located at high altitudes and are very sensitive to electromagnetic interference. The lightning rods of communication facilities generally use passive lightning rods or discharge lightning rods, and the type, quantity, and location of appropriate lightning rods are selected according to the type, location, and function of communication facilities. The lightning protection grounding scheme of communication facilities generally adopts special grounding or hybrid grounding, and the ground wire of the lightning rod is connected with the grounding system of communication facilities to form an efficient grounding system to ensure that lightning can flow into the ground quickly, and at the same time avoid the impact of overvoltage or overcurrent on communication facilities.
Energy Industry:Energy facilities are dangerous targets for lightning because they often contain flammable and explosive substances and are important for power stability. The lightning rod of energy facilities generally adopts discharge lightning rod or passive lightning rod, and the type, quantity, and location of the appropriate lightning rod are selected according to the type, location, and scale of energy facilities. The lightning protection and grounding scheme of energy facilities generally adopts isolated grounding or composite grounding, which isolates or compounds the ground wire of the lightning rod from the grounding system of energy facilities to form a safe grounding system to ensure that lightning can effectively flow into the ground and avoid the danger of fire or fire to energy facilities.