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某线材车间厂房共约210m长,同一滑触线上共有3台桥式起重机同时使用,因滑触线使用多年,弯曲扭转变形十分严重,故决定全部更换。滑触线在刚更换后的大半年中,还比较平直,后来发现滑触线又逐渐扭转变形。为防止此种现象继续蔓延,仔细分析了滑触线变形原因。考虑到车间约有三分之一长度的滑触线处于轧钢冷床上方区域内,线材冷却时散发出的大量热量使厂房上部空间局部区域温度升高,导致同一滑触线上温度差别较大,由于热涨冷缩的原因,使滑触线
A wire workshop totaling about 210m long plant, the same slip line a total of three overhead crane at the same time, due to the use of the trolley line for many years, bending deformation is very serious, so decided to replace all. Slip line in the first half after the replacement, but also relatively straight, and later found that the trolley line and gradually reverse the deformation. In order to prevent this kind of phenomenon from continuing to spread, the cause of the deformation of the trolley wire has been carefully analyzed. Considering that about one-third the length of the trolley line in the workshop is in the area above the cooling bed of the steel rolling mill, the large amount of heat emitted by the wire cooling causes the temperature in the local area in the upper space of the plant to increase, resulting in large temperature differences on the same trolley line , Due to heat up cold shrinkage, so that the trolley line