Overhead Crane Accidents: Derailment

2023-06-29 14:55:07

Single Girder Overhead Crane Derailment Accident

Single girder overhead crane derailment accidents occur from time to time, resulting in a serious fall of the entire crane. Here are the three major factors leading to single girder overhead crane track derailment:

Single girder overhead crane travel mechanism has two parallel actuators and two brakes, respectively, to achieve the braking function, the braking torque is manually adjusted, so there is inevitably an objective difference, due to the inconsistency of the two sets of braking torque, when the braking action, the main beam will be skewed, the rim of the wheel is damaged due to track friction.
Single girder overhead crane track generally uses pressure plate and chemical bolts fixed on the load-bearing beam, when the crane starts, runs and stops, the impact on the track is greater, long and frequent starts and stops will lead to loose chemical bolts, resulting in track displacement, when the track span is greater than the span of the main beam, derailment may occur.
When the wheelbase and track surface clearance is too large, the main beam of single girder overhead crane will tilt and run at too large an angle.

(To prevent single girder overhead crane derailment can be installed on the end beam guide wheel.)

How to Check the Single Girder Overhead Crane Safe?

Check whether the single girder overhead crane wire rope has burr phenomenon.
Check whether the various buttons are intact.
Check whether the single girder overhead crane has chewing rail phenomenon.
Check whether there is noise when the single girder overhead travelling crane is running.
Check whether the braking effect is good.
Check whether the rising limit position limiter action is safe and reliable.
Check whether there is abnormal sound and vibration when the hoisting and running mechanism is running empty.
Check whether there is any abnormality in the hook and pulley set.
Check whether the lifting wire rope is faulty and damaged.

How to Maintain Single Girder Overhead Crane?

Check the limiter: the action should be flexible and reliable.
Check and adjust: When the hook rises to the upper limit position, the distance from the hook shell to the reel shell should be >50m.
Check and adjust: When the hook is lowered to the lower limit position, it should be ensured that the steel wire rope on the ring barrel has more than 3 safety turns.
Check whether the buffers or baffles at both ends of the I-beam are reliable and firm.
Check the motor and brake.
Check the gears and bearings of the reducer for wear, and there should be no abnormal sound, vibration, heat and oil leakage when working.
Check whether the steel wire rope has burr phenomenon.
Check whether the hook has cracks, the amount of wear of dangerous section, the degree of opening, the amount of torsional deformation, etc. If one of the above conditions occurs, the hook should be replaced.
Check the electrical part, including whether the power cord and control cable are worn, whether the grounding is good, and whether the coupling point of the electrical contact is free from loosening and falling off, etc.

Get Your Free Quote

I'm happy to help you with a crane solution and pricing. Please provide me with the following crane specifications:

What type of overhead cranes do you need? (i.e., overhead crane, gantry crane, etc.)
What lifting capacity do you need for your overhead crane?
What span of crane do you need?
What lifting height of overhead cranes do you need?
What material will the crane lift? (i.e., steel, concrete, etc.)
Will the crane be used indoors or outdoors?
Any special requirements for the crane? (i.e., explosion-proof, etc.)