Explosion-proof knowledge Explosion-proof electrical equipment commonly used terminology 7 Explosion-proof electrical equipment 71 Explosion-proof electrical equipment 1 Type of electrical equipment Explosion-proof type It is an electrical equipment with a flameproof enclosure. 2 Explosion-proof enclosures in electrical equipment for explosive atmospheres. Explosion-proof type of electrical equipment. It can withstand the explosion of the flammable mixture entering the interior of the enclosure without damage, and will not be introduced through any joints or structural holes in the enclosure. The opposing surfaces of the external explosive atmosphere enclosure formed by the species or gases or vapors cooperate to engage the joint surface that prevents the internal explosion from blasting into the explosive atmosphere surrounding the enclosure. The distance between the opposite faces of the flameproof joint faces is a cylindrical fit, which is the difference between the radial gaps and the diameters of the 75. The maximum allowable clearance is based on the volume of the flameproof enclosure of the explosion-proof electrical equipment and the length of the flameproof joint. And the specified maximum gap value. The shortest path length from the interior of the flameproof enclosure through the flameproof joint to the exterior of the flameproof enclosure is not applicable to the ten threaded joint. The opposite side of the flameproof joint surface of the insulating member opposite to the surface of the insulating member opposite to the outer surface of the flameproof enclosure of the flameproof outer casing is a plane, and the joint surface of the joint The long straight surface is cylindrical. And the opposite side of the joint surface of the flameproof joint surface having the length of the joint surface comprises a plane and a cylindrical joint surface, and the flameproof joint is formed by a plane flameproof joint surface cylinder flameproof joint surface or a combination of the two. Explosion joint surface 13 floating seal flameproof joint surface allows for radial displacement between the fixed and rotating parts. Explosion-proof joint surface 8 sand-filled electrical equipment 1 Explosion-proof type of sand-filled electrical equipment in electrical equipment for explosive gas environment It is a kind of powder material filled with sand or other specified characteristics in the outer casing, so that the arc or high temperature generated in the shell can not ignite the surrounding explosive gas environment under the specified conditions of use. 9 Increased safety electrical equipment 1 explosive gas Environmentally-friendly electrical equipment, safety type, electrical equipment type of explosion-proof type It is an additional measure to prevent the arcing of electrical equipment under normal operating conditions to improve its safety and prevent its internal and external components, Electrical equipment that can present dangerous temperature arcs and sparks. Limit temperature of 92 increased safety electrical equipment The maximum allowable temperature of the electrical equipment or its components is equal to the lower of the two temperatures determined by the following conditions. 3 dangerous temperature ignited by explosive gas environment; 1 heat stable temperature of materials used in electrical equipment 3 time of increased safety electrical equipment at the highest environmental overflow, reaching the rated AC winding after the operation of the constant temperature, starting from the starting current The time required to count up to the limit temperature is 10. The type of positive pressure type electrical equipment in the electrical equipment for explosive gas environment is an explosion-proof type of electrical equipment. It is maintained by maintaining the pressure of the internal protective gas higher than the surrounding area. Explosive ambient pressure 2 positive pressure shell through the positive pressure method to prevent the external mixture from entering the venting surface of the outer casing 3, electrical protection before the energization of the foot protection body 讪 overpressure 712 curved road flameproof joint surface and the pipeline to make explosive gas The process in which the concentration of the mixture falls below the lower explosion limit. The protective gas is called to maintain the old pressure or to dilute the concentration of the flammable gas or vapor to the explosive gas. The protective gas may be air nitrogen or any other non-flammable gas or they mixture. Oil immersed electrical equipment. Explosion-proof type of oil-immersed electrical equipment in electrical equipment for explosive gas atmospheres. It is an electrical equipment that immerses the entire equipment or parts of the equipment in oil so that it cannot ignite the explosive atmosphere above the surface or outside the casing. = 12 Intrinsically safe electrical equipment and its associated electrical equipment 121 Intrinsically safe circuits Under the specified test conditions, the sparks and thermal effects generated under normal operating or specified fault conditions are not able to ignite the regulations 122 intrinsically safe electrical equipment order circuits The electrical equipment 123 that is connected to the intrinsically safe circuit of the electrical equipment of the wooden safety circuit or part of the circuit is not all intrinsically safe, but electrical equipment that may affect the safety of the intrinsically safe circuit. 124; Class 1 electrical equipment works normally and imposes a fault and any combination of two fault conditions, can not cause ignition of intrinsically safe electrical equipment, 125; grade electrical equipment can not cause ignition under normal working conditions and under the application of a fault condition The intrinsically safe electrical settings are each. The 126 safety barrier is connected between the intrinsically safe circuit and the non-intrinsically safe circuit to limit the voltage and current of the intrinsically safe circuit so that it does not reach the level of ignition. 127 Intrinsically safe circuit spark test device is used to verify that the spark generated by the circuit can not ignite the specified explosion-proof converter. The flue gas dedusting is feasible by the electrostatic precipitator. Liu Hanjie Wuhan Iron and Steel Group public security environmental protection, keyword sub-smoke; electricity Dust collector; Explosion-proof summary Through the analysis of the sub-smoke dust removal process and flue gas composition of the converter, it is discussed that the sub-smoke of the converter will not be dusted by the electrostatic precipitator, and the explosion will demonstrate that the sub-dust dedusting of the converter adopts electric dust removal. The device is feasible. Industrial safety and dustproof 2000 explosion-proof counter-rotating axial flow ventilator Zhang Guangxun Li Dewen Guo Keshe Coal, Science Research Institute Qing Branch 400037 Keywords explosive environment; counter-rotating axial fan; application summary The newly developed phantom explosion-proof anti-rotation pumping type 5 mine explosion-proof multi-function reversible portable switch development Zhang Weiguo Huainan Institute of Technology, Huainan, Anhui 232001, information keywords reversible; portable; switch; electronic protection; Abstract, the key to the research and development of the 415 type mine 1 explosion-type multi-turnable reversible portable switch and its control and protection of the reversible explosion-proof electrical equipment below 15 will play a new role. Medium Classification No. 6.5 Document Identification Code Article Number 10010874200003001602 Introduction of Flame-retardant Performance of Introducing Device Zhao Jinlu Guo Xiaoyu Shanxi Yangquan Coal College Shanxi Yang Keyword Sealing, Introducing Device; Flameproof Performance; Discussion Abstract This paper discusses the sealing of mine explosion-proof electrical equipment The explosion-proof performance of the rubber cable was introduced, and the reliability and safety of the structure were analyzed. The revision and improvement of the relevant procedures of 426292 were proposed. Medium classification number TD6i Crown Pendants,Bridal Tiaras,Star Crowns,Crowns And Tiaras YiWu Home Of Crowns Co.,Ltd , https://www.crystal-crowns.com
September 23, 2021