在斜井绞车提升中,因钢丝绳缓冲,能使矿车连接钩头鸭咀插销串出,造成跑车事故,对矿井安全生产是一严重威胁。1977年11月,我们试用鸭咀保险插销,(其构造如图),使用一年来,没有再因串销子造成跑车事故,保证了安全生产。使用时,将插销插入鸭咀内,转动插销 In the inclined shaft winch hoisting, due to the steel wire rope cushioning, the hook can be connected to the hook of the hook, which causes the sports car accident, which is a serious threat to mine safety production. November 1977, we tried duck bail insurance bolt, (its structure shown), the use of the past year, there is no longer a series of sports car accidents, to ensure safe production. When used, insert the pin into the duckbill and turn the pin