What are the "Ten Don't Hang" tower cranes?

The contents of ten no-lifting are as follows:

(1) Oblique lifting without lifting;

(2) Do not hoist when overloaded;

(3) The bulk material is too full or not securely tied, so it is not hoisted;

(4) the edge of the hanging object is not hoisted without protective measures;

(5) people don't lift the object when it is lifted;

(6) Don't hang up if the command signal is unknown;

(7) buried components are not hoisted;

(8) the safety device fails to be hoisted;

(9) If the light is dark, you can't see the hanging object clearly and don't hang it;

(1) Don't hoist the strong wind above level 6.

Extended information

Operating instructions for tower crane:

(1) Before use, check that all metal structural parts and appearance are in good condition, the sound is normal during no-load operation, the braking during heavy-load test is reliable, and all safety limit and protection devices are complete and in good condition, and the action is sensitive and reliable before operation. ?

(2) When operating each controller, it should be operated step by step in turn, and it is forbidden to operate beyond the block. When changing the direction of operation, the operating handle should be reset to zero, and the motor should stop rotating before reversing operation, so as to be stable. It is forbidden to start and stop suddenly.

(3) When the equipment is in operation, if any abnormality is found in the machinery, it should be stopped immediately for inspection, and it can only be operated after the fault is eliminated.

(4) Strictly hold relevant certificates. It is forbidden to work after drinking. It is forbidden to use the travel switch instead of parking. It is forbidden to work illegally, leave the job without permission or give the machine to others to drive.

(5) When loading heavy objects, you should leave the ground for a certain distance before proceeding.

Reasons for slipping hook:

(1) The fixed screw of the contactor power supply in and out of the tower crane distribution box is loose, the terminal block bolt is in poor contact, and the contactor main contact is in poor contact.

(2) The terminal bolts of the rotor and stator coils of the motor have poor ablation contact.

(3) The brake pads of high and low speed motors are worn beyond the specified requirements.

(4) The gearbox gear is damaged, and the fixed gear bolt is loose.

(5) the open-phase protector does not work.

Reference: Baidu Encyclopedia-Tower Crane