Double-arm-parallel flat-top tower type crane

Abstract

The invention relates to a double-arm parallel flat-top tower crane, which includes two parallel inverted triangle booms, two independent hoisting mechanisms, two independent luffing mechanisms, two independent luffing trolleys, and two hoisting The balance arm and slewing joint of the mechanism, and the hoisting wire ropes of the two sets of hoisting mechanisms enter the rope guide pulley and the hoisting pulley block of the luffing trolley through the respective guide rope pulleys on the tower top, and are fixed on the arm end to form a tower crane. Two sets of independent lifting systems, one end of the upper chord of the boom is connected to the lug plate on one side of the rotary joint, the lower chord is connected to the joint of the rotary joint, and the other side of the rotary joint is connected to the balance arm, and the two sets of luffing trolleys are respectively placed in two parallel On the boom, the luffing trolleys are dragged by two luffing mechanisms respectively, and the luffing trolley control system drives the two luffing trolleys to work independently, simultaneously or synchronously. The problem is too large, and the work efficiency is improved by setting two luffing trolleys.

Description

technical field [0001] The invention belongs to the field of construction machinery design, in particular to a double-arm parallel flat-top tower crane. Background technique [0002] The tower crane is an important lifting equipment in the construction industry. The flat-top tower crane has the advantages of convenient installation and good force characteristics of the boom. The jib frame is an important part of the flat top tower crane. It bears the main working load of the crane. The performance of the jib frame directly affects the overall performance of the flat top tower crane. At present, the jibs of large and super-large flat-top tower cranes in China adopt an inverted triangular cross-section structure, and the size of the jibs is difficult to meet the requirements of road transportation. Thick, there are problems such as difficulty in manufacturing and processing, low strength utilization rate of the material and high quality of the bottom chord, which affects the ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art that the cross-section of the main limb of the boom is too large, the plate material used for welding the main limb is thick, there are difficulties in manufacturing and processing, the strength utilization rate of the material is low, and the quality of the lower chord is large, etc., the present invention provides a Double Arm Parallel Topless Tower Crane

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