冶金桥式铸造起重机在冶金行业主要用于吊运铁水和钢水等熔融金属,具有起重量大、危险性大、作业率高、使用环境恶劣等特点。2007年4月18日辽宁省铁岭市清河特殊钢有限公司发生钢水包倾覆的特别重大事故后,为了保证该类设备的使用安全,国家质检总局要求额定起重量大于或等于75t的起重机,主起升机构应有两套驱动系统,当其中一套驱动系统发生故障时,另一套驱动系统应能保证在额定起重量下完成一个工作循环。然而现行标准、法规中没有对驱动系统 Metallurgical bridge casting cranes in the metallurgical industry is mainly used for lifting molten metal such as molten iron and molten steel, with a large lifting capacity, high risk, high operating rate, poor use of the environment and so on. April 18, 2007 Qinghe Special Steel Co., Ltd. of Tieling City, Liaoning Province after the overturning of the ladle of a particularly serious accident, in order to ensure the safety of such equipment, AQSIQ required lifting capacity greater than or equal to 75t crane, the main Hoisting mechanism should have two sets of drive system, when one of the drive system fails, the other drive system should be able to ensure that the rated lifting capacity to complete a work cycle. However, the current standards, laws and regulations are not on the drive system