256HC Mast Section Cause analysis and preventive measures of tower crane sliding hook
I. the fixed screws of the contactor power supply inlet and outlet wires in the tower crane distribution box are loose, the terminal block wiring bolts are in poor contact, and the main contact of the contactor is in poor contact.
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II. The connection bolts of motor rotor and stator coil are in poor ablation contact.
III. The wear of brake pads of high and low speed motors exceeds the specified requirements.
IV. the gearbox gear is damaged and the fixed gear bolt is loose.
5. The phase loss protector does not work.
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Preventive measures for tower crane sliding hook
I. the tower crane driver shall calm down after the hook slips in the work and inform the signalman in time to let the ground personnel go away. Operate in accordance with the operation regulations, lift the hook, turn the arm, walk the trolley, etc., and place the heavy objects in the unmanned area on site.
2. Do a good job in the safety inspection before, during and after the shift, and conduct the inspection in the form of eyes, ears and hands.
3. Check and fasten the connection points of various lines irregularly.
IV. regularly check whether the brake pads of each brake are normal, whether the motor wiring bolts are in good contact, and whether the main contact of the contactor is normal.
V. the maintenance personnel shall be responsible for the work, do it in strict accordance with the requirements of the safety operation regulations of the tower crane, replace the parts to be replaced, and do a good job of inspection and test run after the work.
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