One, the fire hazard sex of cable
Report is the main the sources of energy of contemporary society, of the transportation of electric power and information and signal deliver all cannot leave wire cable, as our country industry especially the ceaseless development of dynamical industry, the application that big negative charge, superhigh pressure loses power supply technology is increasingly general, the wire cable of the laid in a large plant can be amounted to normally tens of 10 thousand meters long, bring about sex of hazard of wire cable fire to be highlighted increasingly.
The jacket as a result of cable and insulation layer are commonly by plastic make with balata material, have flammability. Reach in the state of fault such as overload, short circuit, local overheat when cable outside insulating material insulation resistance can be caused to drop below hot action, lose insulation ability, burn even, cause fire accident then. Because of the place that this lays thick and fast in cable, cause fire extremely easily. And, once fire happens, igneous situation will spread down the Yan Ran of cable, cause significant pecuniary loss thereby.
Once cable fire happens, its fire situation is violent, spread very fast, in the on fire inside 2 ～ 3s, l00m can spread inside 30 ～ 60s beyond, produce a large number of smother and toxic gas at the same time, because rush to save life and property is difficult, often cause significant pecuniary loss, the life property of serious minatory people is safe. Because the existence of high difference can bring about natural Yang Feng,be more in shaft, make cable combustion more swift and violent. If cable fire happens in system of communication of power plant, post and telecommunications and large industrial and mining enterprises, cause large area power failure likely still, bring abominable social influence.
In recent years, as a result of the addition of cable density and power load, the fire explosion accident that causes by wire cable shows ascendant trend. The United States is in 1965 ～ accident of 3285 of statistic electric fire is medium 1975, accident of wire cable fire is occupied 30.5% , immediate loss restrains 40 million dollar; 1995 ～ of our country between 2005, the grave accident that because cable catchs fire,Yan Ran causes in all 90, cause amount to many yuan 70 with indirect loss directly. On January 16, 2002, high group of Shandong province power is medical the short circuit of circuitry of distribution of sweatbox of electric heat blast inside workshop of infusion of high polymer Inc. causes fire, big baked wheaten cake destroys workshop 10600m2, burn down notes model, sterilization, pack wait for manufacturing facilities to reach large quantities of raw material, direct belongings loss 7.669 million yuan; On October 15, 1995, ministry of limited company technology makes trade of former shoe of world of Zhang Yingzhen Qingdao of city of state of Shandong province rubber preparative workshop produces fire because of cable short circuit, this workshop builds burn down entirely 10386m2 and machine equipment 383, direct belongings loss twenty-seven million eight hundred and fifty-eight thousand yuan.
Previous12 Next
