黄骅港的翻车机系统通过定位车牵引重车列,由推车机将两节重车在平台定位,同时将已经翻卸的空车列定位。但是由于部分火车的钩头故障或锈蚀,钩销不能落下,这样就形成了推车机与平台两节空车挂不上钩(这种情况十分频繁),推车机失去了对空车列的定位控制。如果此时四号夹轮器正常 Huanghua Port’s dumper system through the positioning of the car traction heavy car column, by the pusher two heavy vehicles in the platform positioning, at the same time will have been empty dumping column positioning. However, due to part of the train hook or rust, the hook pin can not fall, thus forming a pusher and platform two empty car hook (this is very frequent), the cart lost the empty train Positioning control. If at this time the fourth wheel clamp normal