我厂竖井提升设备是两台2JK3×1．5型提升机，分别于1970年和1975年投入使用。随着提升任务逐年增加，六七年后卷筒筒壳不同程度地出现裂缝，并逐年扩展和裂透，顺着极厚方向裂开错位。缝长一般200～460mm，最长已达830mm。为防止筒壳彻区破坏，我们于1988年4月和9月分别对两台 I plant shaft hoisting equipment is two 2JK3 × 1.5 hoist, respectively, in 1970 and 1975 put into use. As the task of ascension increases year by year, after six or seven years, the drum shell cracks to different extents and expands and penetrates year by year, splitting the dislocation along the extremely thick direction. Length of the general 200 ~ 460mm, the longest reached 830mm. In order to prevent the destruction of the cartridge area, we conducted two tests in April and September 1988 respectively