The screw rod type gate and the cast iron strobe installment and the debugging and the use maintenance cast iron strobe 1, before the installment, must first inspect between between the mull on and the horizontal frame, the damper plate and the damper plate (refers to strobe which multi-block damper plate combines) binding screw, whether causes in transportation loading and unloading becomes less crowded, whether do they meet the stubble wrong tooth, must adjust a plane, inspects the damper plate and the floodgate trough gap, guaranteed the floodgate trough and the damper plate gap is not bigger than 0.08mm, if has the gap to be possible to adjust shuts the tight installment.