290HC Mast Section use for 12Ton tower crane rise

29-10-2019

 

Lifting boom: on the ground the tower top and the first section of the balance arm pull rod and the upper long pull rod of the lifting boom pull rod and the lower short pull rod are well connected with the pin shaft, and then hoisted and connected with the upper support with four pin shafts. Assemble good balance arm on the ground, and the lifting mechanism, electric control cabinet and resistance box perfectly on the balance arm, connect the parts required for the wire, and then balance arm hung with hinged bearing pin shaft to end, again raise balance arm with a horizontal Angle to the installation position of balance arm pull rod, pack good balance arm pull rod, then pull rod unloading. How are cranes built? Where is the tower crane monitoring system installed?

Install the balance arm: connect the first section of the tower top and the balance arm pull rod and the upper long pull rod and the lower short pull rod with the pin shaft on the ground. Assemble good balance arm on the ground, and the lifting mechanism, electric control cabinet and resistance box perfectly on the balance arm, connect the parts required for the wire, and then balance arm hung with hinged bearing pin shaft to end, again raise balance arm with a horizontal Angle to the installation position of balance arm pull rod, pack good balance arm pull rod, then pull rod unloading.

Install frame A assembly: lift the mounted ladder and platform frame A assembly, first connect the front chord of 290HC Mast Section with 4 pin shafts and balance arm.

Threading the wire rope and hook: after the lifting wire rope is guided through the guide pulley on the top of the tower, bypass the lifting weight limiter pulley at the root of the lifting boom, then lead to the trolley pulley and the lifting hook pulley to be threaded and wound, and finally, fix the rope end on the arm head. Then lift the car to the root of the car and the boom hit the iron crash. Turn the small rope drum with gear on the trolley and tensify the traction rope as much as possible.

Standard Section: rotate the lifting boom to the direction leading into the 290HC Mast Section, and loosen the cable length slightly greater than the total climbing height; After the tower crane has finished the section, it should rotate the arm frame to different angles without load and check whether the high-strength bolts at the joints of the standard section of the tower body are tightened.

After installation of the tower crane, adjust the following safety devices according to the method and sequence indicated in the operation manual:

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