Deck unit erection gantry for hoisting by large deflection angle
A large deflection angle and cross-cable technology, which is applied in the direction of cable cranes, cranes, transportation and packaging, etc., can solve the problem of bending of lifting ropes, poor bending fatigue performance of hydraulic cross-cable cranes, and unsuitability for large deflection angle hoisting, etc. problem, to achieve the effect of low cost and convenient installation
Inactive Publication Date: 2012-08-22
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
The hydraulic cable span crane has poor bending fatigue performance due to its hoisting steel strand or high-strength thick steel bar [9，10] , not suitable for hoisting at large deflection angles
However, the previous hoist-type spanning crane [5，6，8] , although the bending fatigue performance of the hoisting steel wire rope is better, but because the vertical deflection angle of the hoisting rope is constantly changing during the hoisting process, the hoisting rope will bend around the lower chord of the beam of the cross-cable crane, and the cross-cable The unfavorable force of the crane is not suitable for hoisting at a large deflection angle
Method used
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[0039] The specific implementation of the cross-cable crane hoisted at a large deflection angle will be described below in conjunction with the accompanying drawings.
[0040] Such as Figures 1 to 9As shown, a kind of cross-cable crane for hoisting at a large deflection angle includes a beam, an end beam, a hinge seat, a lifting system, a walking system, an anchoring system, and an auxiliary lifting system. The beam includes two middle sections of the beam 1, two A crossbeam side section 2 and several crossbeam pin shafts 3, between the crossbeam side section 2 and the crossbeam middle section 1, and between two described crossbeam middle sections 1 are hinged and connected as a whole by the crossbeam pin shaft 3; the crossbeam side section 2 includes an upper beam 4 and a lower beam 5, two cross-links 6 are fixedly connected to the lower beam 5, and the end beam is divided into an end beam middle section 7 and two end beam side sections 8, and the end beam middle section 7 ...
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The invention relates to a deck unit erection gantry for hoisting by a large deflection angle. A principle axis of a fixed pulley block is arranged between two cross links; a movable pulley block is arranged below the fixed pulley block; a lifting appliance is connected below the movable pulley block; one end of a hoist rope is directly connected with a lifting hoister, and the other end thereof is anchored on an underbeam by sequentially bypassing the fixed pulley block and the movable pulley block; and one end of an auxiliary wire rope is connected with an auxiliary hoist, and the other endthereof is installed on the movable pulley block or a hoisting section directly or indirectly connected with the movable pulley block. The deck unit erection gantry has the advantages of convenient installation, lower cost and safety and reliability, and capability of hoisting the beam section with larger deflection angle and the like, and is applicable to the erection of suspension bridges in mountainous areas.
Description
technical field [0001] The invention relates to a cable-spanning crane, in particular to a cable-spanning crane hoisted at a large deflection angle, which is suitable for erecting suspension bridges in mountainous areas. Background technique [0002] With the rapid development of my country's national economy, more and more highways are built in mountainous areas, and suspension bridges in mountainous areas continue to emerge. At present, the erection of stiffening girders of suspension bridges within a span of 800m in mountainous areas mainly adopts the "cable hoisting method" [1，2] , when the span is larger, it will be difficult to meet the economic requirements; for steel truss girders, the "deck crane rod assembly method" can be used [3] , but the control design of the stiffening beam supporting the deck crane may be determined by the force of the hoisting state of the deck crane, which increases the cost. At the same time, the weight of the assembled unit is limited (s...
Claims
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IPC IPC(8): B66C21/00
Inventor 董创文李传习赵朝阳张玉平柯红军郭彤曹水东刘建杨美良
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY