The “new-generation direct-thunder lightning protection device†was jointly developed in June 2006. In 2008, the “Tenault-type I direct lightning protection device†began trial operation, and in August 2009, it passed the expert technical appraisal organized by the Second Artillery Equipment Department. In 2010, the sky curtain series of products began mass production, focusing on power, petrochemical, communications, radio and television, and other harsh environments, industries and regions with high requirements for lightning protection.
Lightning is the phenomenon of electric charge discharge between cloud and cloud or between cloud and earth, especially the “cloud land mine†generated by thundercloud's discharge to the earth has the greatest impact on human life. When a “cloud mine†happened, the air was broken down and a discharge channel was formed. The charge in the cloud was discharged to the earth through the “landing point†on the ground. During this time, the lightning current generated was as high as tens of thousands of amps above ground. Facilities and people are extremely dangerous, especially induced lightning caused by direct lightning strikes, which poses a great threat to ubiquitous microelectronic devices in today's society. .
For more than two hundred and sixty years, the Franklin lightning rod has been the main means of human lightning protection and lightning protection. In the latter half of the 20th century, with the wide application of electronic information technology, the limitations of conventional lightning rods and lightning conductors have become increasingly prominent. They are mainly manifested in the fact that a strong electromagnetic field is generated in the process of lightning and lightning, leading to more induced lightning strikes. “Secondary lightning strike effectâ€; Where microelectronic equipment is relatively concentrated, induced lightning strikes pose a great threat to the safety of the equipment; lightning rods lead to ground to generate ground potential counterattack, step voltage and other issues.
Therefore, for decades, scholars at home and abroad have never stopped the research on the improvement and innovation of lightning rods.
At present, China's lightning protection technology has evolved from the protection of a single product to the overall protection of the system, and technology has matured. However, for some important protection targets, the best state of lightning protection is to prevent lightning from happening at the target place that needs protection. In theory, simply speaking, if the downward lead energy of the lightning can be dissipated locally, the formation of local lightning can be destroyed. Since the 1970s, some European and American countries, Asian, Japanese, Korean and Chinese scholars have been working hard to eliminate the harm caused by lightning. In the meantime, some products have come out, but due to defects in principle or poor results, they gradually withdrew from the market.
China's development of "lightning flashback protection device" and "enhanced direct lightning protection device" technology is currently the world's leading direct lightning protection technology. In August 2009, the Second Artillery Armament Department hosted the “Tenault-I-type direct lightning protection device†results appraisal meeting. Prof. Zhou Xiaohua of the PLA University of Science and Technology and other experts inside and outside the army all agreed that: “The device is aimed at direct lightning strike protection needs and breaks through traditions. Lightning rod design concept, for the first time put forward the concept of direct lightning strike protection, a new design of the metal atmosphere electrode and varistor suppressor, to solve the problem of rapid accumulation of induced charge release and lightning channel blocking problem, effectively avoid and reduce the regional direct lightning caused The thunder and lightning disaster.... Independently innovated the lightning-resistant 'flashback' technology to reach the domestic leading level, and the promotion and application of this technology has significant military benefits.â€
Xuchang lightning protection company, insulated lightning rod, LNG refueling station lightning protection, Pingdingshan lightning protection company, Ericsson grounding products, PULSAR30/45/60 lightning rod
Double Handles Bathroom Faucet
1. Copper body: As far as the faucet is concerned, copper has long become the preferred material, mainly because the antibacterial effect of copper media has long been recognized by authoritative laboratories. Most high-end bathroom brands use copper as the body of the faucet, and the elimination of other materials has become an inevitable trend.
2. Electroplating: The quality of the electroplating surface is the most intuitive expression of the quality of the faucet. The surface plating is mainly nickel and chromium, so that it achieves a smooth and bright effect. Good quality faucets will undergo many tests, such as salt spray test, water test test, gas test test, etc., to ensure the durability of the faucet. After high-precision plating faucet, durability is basic, and more importantly, its surface gloss is good and comfortable to handle. Some high-grade faucets have other different treatment techniques, such as stainless steel and satin.
3. Filter screen: In areas where the water quality is not superior, the installation of the filter screen can reduce and filter impurities, and at the same time prevent the possible damage caused by impurities to the ceramic valve core. There are two installation locations for the filter: the water inlet and the spout.
4. Rotation angle: can rotate 180 degrees to make the work convenient, and can rotate 360 degrees is only meaningful for a sink placed in the center of the house.
5. Can lengthen the shower head: increase the effective radius, increase more functional possibilities, and the sink and container can be filled faster. In order not to make unpleasant noises, metal pipes should be avoided as much as possible.
6. Water pipe length: Experience shows that 50 cm long pipes are enough, and pipes of 70 cm or more can also be bought on the market.
7. Anti-calcification system: calcium will be deposited in both the shower head and the automatic cleaning system, and the same situation will occur on the faucet, where silicon will accumulate. The integrated air cleaner has an anti-calcification system that prevents calcification of the device internally.
8. Anti-backflow system: This system prevents dirty water from being sucked into the clean water pipe, which is composed of layers of materials. Devices equipped with an anti-backflow system will display the DVGM pass mark on the surface of the package.
9. Material: Stainless steel is hygienic and environmentally friendly. Chromium devices are easy to care for and harmless to people, but other elements need to be added to the manufacturing process. Therefore, it must be paid attention to what materials the equipment is made of, and not all countries have such high standards as Germany.
10. Durability: The anti-calcification system can protect the equipment from the danger of water leakage and handle damage.
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