Rail gnawing of single beam crane not only affects operation but also may lead to safety accidents. There are mainly the following cases: lead to track damage, track in the wheel irregular rolling will wear, resulting in track potholes and uneven. The operation is not smooth, single beam crane gnawing rail, will cause the resistance of the operation becomes larger, thus increasing the load of the motor. Large noise, gnawing rail will occur abnormal sound and strong vibration, serious will affect the safety of the plant. If there is serious gnawing rail may also lead to the single beam crane derailment in operation, injury to personal safety.
According to the structural form, the crane is mainly divided into light and small lifting equipment, bridge type (bridge type, gantry crane), arm type (self-propelled, tower type, gantry type, railway type, floating boat type, mast type crane), cable type. Light small lifting equipment is characterized by light, compact structure, simple action, the scope of operation projection to point, line.