132HC Mast SectionOn the tower crane boom, balance arm is how to maintain the balance of a brief introduction
A little bit about it. The balance arm of the tower crane is a welded structure of I-steel and angle steel. It is divided into two sections and connected with the trunnion pin. The balance arm of the tower crane is provided with balustrades and passageways, and a working platform is arranged at the tail One end of the balance arm of the tower crane is connected with the revolving tower body by two special pin shafts, the other end is connected with the tower cap by a combination of rigid pull rods, and the tail part is provided with the balance weight and the lifting mechanism, the lifting mechanism itself has an independent base The balance arm of the tower crane is balanced by four pin shafts.
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The weight of the balance arm varies with the length of the crane arm. When the arm is 50 meters long, it is 13 tons, when the arm is 44 meters long, it is 12 tons and when the arm is 38 meters long, it is 11 tons. The Tower Crane balance arm tie rod is divided into two groups. The Tower Cap and the tie Rod ear plate at the tail of the Tower Crane balance arm are connected respectively by a special pin shaft. Tower crane boom is a combination of variable structure, a total of nine sections. The upper and lower chords of the JIB are square pipes made of two angle steels welded together. The whole Jib is of triangle section. The joints are connected by pin shafts. It is convenient to disassemble and assemble The crane arm adopts double lifting points variable cross-section space truss structure, a trolley traction mechanism is placed in the first section of the crane arm, and a hanging basket is arranged on the trolley for easy installation and maintenance. In order to ensure the crane arm level, the second and sixth arm are provided with two hanging points, through which the tower cap is connected. When the boom is assembled, it must be assembled strictly in accordance with the serial number mark on each arm, no malposition or random assembly is allowed. The longest of the boom is 50 meters, and the boom can be assembled into 44 meters long and 38 meters long according to the construction requirements When the arm length of 44 meters is changed, the position of the lifting point of the tie Rod Tower will not change, and when the arm length of 38 meters is changed, the position of the lifting point of the tie rod will not change. The upper ends of the two groups of Jib pull rods are connected with the tower cap lug plate through a special pin shaft, and the lower ends are connected with the lifting point pin holes of the upper boom chords respectively to suspend the boom in a horizontal form.
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