132HC Mast Section Five rules to prevent the second-hand tower crane from slipping hook
The second-hand tower crane is more economical, but the second-hand tower crane is used for a long time, the aging of parts is inevitable, and the hidden danger of tower crane sliding hook accident is also increasing day by day. Therefore, how to prevent the slide hook of the second-hand tower crane is an urgent problem for the users of the tower crane.
http://www.towercranesupply.com/product/132hc-mast-section-liebherr-tower-crane
1 reasons
Generally speaking, the causes of tower crane sliding hook accidents are as follows:
(1) Poor contact
For example, the fixed screws of the contactor power inlet and outlet wires in the tower crane distribution box are loose, the connection bolts of the motor rotor and stator coil are in poor contact with ablation, the connection bolts of the terminal board are in poor contact, and the main contact of the contactor is in poor contact.
(2) Wear
The brake pads of high-speed and low-speed motors are worn beyond the specified limit, the gearbox gears are damaged, and the fixed gear bolts are loose. In addition, the failure of phase loss protector is also an important reason for the slide hook of second-hand tower crane.
2 prevention measures
Based on the above reasons, five rules are summarized to prevent the second-hand tower crane sliding hook accident, hoping to help the majority of tower crane users:
(1) Prevention in advance
http://www.towercranesupply.com/product/132hc-mast-section-liebherr-tower-crane
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.
(2) Tight "safety string"
Check and fasten the connection points of various lines irregularly.
(3) Technology does not prevent loosening
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.
(4) Do not slack off in the renovation work
The maintenance personnel shall be responsible for the work, do it in strict accordance with the requirements of the safety operation procedures, replace the parts to be replaced, and do a good job of inspection and test run after the work.
(5) Don't panic at the head of the accident
The tower crane driver should calm down after the hook slip phenomenon occurs 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.
http://www.towercranesupply.com/product/132hc-mast-section-liebherr-tower-crane
