目前,我国煤矿主井广泛采用曲轨连杆下开折页扇形闸门箕斗。该类型箕斗虽然具有自动卸载的优点,但开、闭闸门冲击力较大。尤其是在使用几年后,当井架卸载曲轨或箕斗上卸载曲轨发生了磨损变形后,闸门在提升过程中就可能由于受振动冲击自动打开,拉坏箕斗及井筒设备,砸坏井筒中的电缆或管路。我矿1988年安装的主井提升系统,绞车型号为2JK-2.5/20,箕斗型号为JL-3,是扇形闸门箕斗。1989年开始就出现了箕斗在井筒中自动打开现象,每年发生三四次,导致主井提升设施损坏,经济损失严重。 At present, the main coal mine shaft widely used under the curved track connecting rod folding gate fan gate. Although this type of skip has the advantages of automatic unloading, but open, close the gate impact. Especially after a few years of use, when the derrick unloading curve or the unloading curve on the skip has worn out, the gate may be opened automatically due to the vibration impact during the lifting process to pull the skip and the wellbore equipment and smash Cable or pipe in wellbore. Mine mine in 1988 installed the main shaft hoisting system, winch model 2JK-2.5 / 20, skip model JL-3, is a fan-shaped gate skip. Starting in 1989, the phenomenon of automatic opening of the skip in the wellbore occurred three or four times per year, resulting in damage to the main shaft hoisting facilities and serious economic losses.