The working principle of the tower crane is that the hoisting machinery is lifted by the lifting hook or other picking device or lifting and moving heavy objects. The working process of hoisting machinery generally includes the steps of lifting, running, lowering and returning to the original position. The hoisting mechanism lifts the heavy object from the picking location through the picking device, displaces the heavy object through the operation, rotation or luffing mechanism, puts the heavy object under the designated location and returns to the original position.
1. Set the jacking beam in the arc groove of the standard step (a special person should be responsible for observing that the pins on both ends of the jacking beam must be placed in the arc groove), start the hydraulic system to make the piston rod extend, and the jack The jacking frame and the above parts are lifted up, and the jacking of the jacking frame is placed on the upper step of the standard section after the jacking up slightly exceeds the height of the half section standard section.
2. After confirming that the two climbing claws are accurately hung on the top of the step, retract all the cylinder pistons, lift the lifting beam, and make the lifting beam top on the previous step on the standard section.
3. Extend the oil cylinder again and lift the tower crane's upper structure slightly beyond the standard height of the half section. At this time, there can be a space for a standard section just above the tower body.
4. Guide the jacking frame|the standard section of the cross beam to the top of the tower body, retract the cylinder slightly, and put the new bow|the standard section of the bow on the top of the tower body, and align, remove the bow|into the roller, Use 12 or 8 pieces of M36 high-strength bolts to connect the upper and lower standard sections firmly.
5. Retract the cylinder again, lower the support and fall on the top of the new tower body, and align, use 8 pieces of M36 high-strength bolts to firmly connect the lower support and the tower body, each high-strength bolt must have two nuts, That is to complete the addition of a standard section.
6. If you add several standard sections in succession, you can repeat the above steps several times.
7. In order to make the lower support fall smoothly on the top of the tower body, and align the connecting bolt holes. Before retracting the cylinder, four rods (one for each corner) can be inserted into the bolt holes in the four corners of the lower support from the top to the down to lower the lower support.
