L46A1 Mast Section Five Rules for the Prevention of Slip-hook Accidents in Second-hand Towers

27-09-2019

Second-hand tower lifting is relatively economical, but the use of second-hand tower lifting time, parts aging is inevitable, the hidden danger of the tower hook accident is increasing day by day. Therefore, how to prevent the second-hand tower hook is an urgent problem for tower crane users to pay attention to.
1 Reasons

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In general, the reasons for the tower hook accident are the following:
(1) Poor exposure
For example, the power supply of the contactor in the tower crane distribution box is loose, the wiring bolt ablation contact of the motor rotor and the stator coil is poor, the connection terminal plate wiring bolt contact is poor, and the contact contact contact of the contactor is poor.
(2) Wear and tear
High and low speed brake brake pads wear more than the prescribed limit, gearbox gear breaks, fixed gear bolts loose. In addition, the failure of the phase deficient protector is also an important reason for the second-hand tower hook.
2 Preventive approach

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Based on the above reasons, the article summarizes the five rules for preventing the accident of the second-hand tower hook, hoping to help the majority of Tower hanging users:
(1) Prevention before it occurs
To do a good job in the security inspection work before, during and after the class, we must use visual, ear, manual and other forms of inspection.
(2) Tight "safety string"
Inregularly check and tighten various connection points.
(3) Technology does not prevent loose
Check regularly whether the brake pads of each brake are normal, whether the motor wiring bolt contact is good, and whether the main contact contact contact of the contactor is normal.
(4) Refurbishment work

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The maintenance personnel should be responsible for the work, strictly in accordance with the requirements of the safety operation regulations, the replacement of accessories must be changed, after the work of inspection, test operation.
(5) Do not panic in the accident
The tower crane driver should calm down after the phenomenon of sliding hooks in the work and inform the signal worker in time to let the ground personnel go away. According to the operating rules and regulations to operate, hook, turn arm, take the car and other methods, the heavy objects placed in the scene unmanned area.

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