Safety precautions for the metal structure of the crane

During the use of the bridge crane, it is necessary to ensure that the main girder of the bridge does not produce excessive deflection and permanent deflection. Otherwise, there will be the following hazards:

(1) Make the trolley "slide" by itself after braking, and cannot stop accurately. When the trolley climbs a slope, the motor will be overloaded and the motor will be burned out.

(2) Distortion of the driving shaft of the walking tissue and excessive force. The connecting bolts of the coupling are twisted off, and even the shaft is broken.

(3) Deform the track of the crane trolley to form a wheel slide, and even present the accident of the derailment of the trolley; cause cracks in the lower cover and web of the main beam, severely threaten to operate safely