The size of the counterweight is inversely proportional to the length of the balance arm, and the length of the balance arm is proportional to the length of the boom.
The function of the tower crane blade tip is to bear the upper load from the boom rope and the balance arm rope, and directly transfer it to the tower structure through the structural components such as the rotary tower, turntable and bearing seat.
The top of jack-up tower has truncated cone column, forward or backward truncated cone column, herringbone frame and diagonal support frame. All top-swing tower cranes need to be equipped with balance weights, whose function is to support the balance weights, so as to form the balance torque required by the design in the opposite direction to the lifting torque.
In addition to the counterweight, a lifting mechanism is often installed at its tail. The hoisting mechanism is placed at the end of the balance arm together with the counterweight, which can play the role of partial counterweight, increase the distance between the rope drum and the guide wheel of the tower tip, facilitate the winding of the wire rope and avoid rope disorder.
Extended data:
Precautions for tower crane operation:
1, the driver should calm down after the hook slips in the work, and inform the bell man in time to let the ground personnel go away. Operate according to the operating rules, hook hands, turn arms, take cars, etc. And put the heavy objects in the no-man's land at the scene.
2, do a good job of safety inspection before, during and after work, with eyes, ears, hands, etc.
3. Irregular inspection and fastening of various line connection points.
4. Regularly check whether the brake pads of each brake are normal, whether the contact of the motor wiring bolts is good, and whether the contact of the contactor main contact is normal.
5, maintenance personnel should be serious and responsible for the work, in strict accordance with the requirements of safety operation procedures, the replacement parts must be replaced, to do a good job of inspection and debugging.
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