Large-scale hoisting equipment with A-frame folding inversed function

Abstract

The invention discloses large-scale hoisting equipment with an A-frame folding inversed function, belongs to the field of cranes, and particularly relates to an overwater floating crane hoist. An A frame is composed of a front supporting rod and a rear pulling plate, and the rear pulling plate is composed of an upper section and a lower section which are connected through a pin shaft; the two sides of the front supporting rod are symmetrically and respectively provided with two support oil cylinders, each support oil cylinder is correspondingly provided with an operation standard oil cylinder supporting base and a folding inversed position oil cylinder supporting base on the front supporting rod and an upper rotating platform respectively, and supporting rods are symmetrically arranged among the two sides of the front supporting rod and the upper rotating platform; and when the A frame is folded and inversed to form a critical angle between the horizontal surface and the front supporting rod, the connection between the support oil cylinders and the standard oil cylinder supporting base is changed into the connection between the support oil cylinders and the inversed position oil cylinder supporting base, so that the support oil cylinders can support the A frame in the folding inversed position. The A frame provided by the invention can be stressed reasonably in a folding and stentering process so as to be safe and stable, the A frame of the overwater floating crane hoist is exactly, efficiently and safely folded, and a height permitted requirement in an inland river is met.

Description

technical field [0001] The invention relates to a large-scale hoisting device with an A-frame with folding and inversion functions, which belongs to the field of cranes, and in particular relates to a crane for a floating crane. Background technique [0002] At present, large-tonnage floating jib cranes are usually equipped with an A-frame, which is fixedly installed at the stern of the crane ship. The A-frame is equipped with various steering pulleys and luffing fixed pulleys to withstand the overturning moment of the whole machine. With the increasing development of inland water projects, the demand for large-scale lifting equipment on water is increasing, and the height limit of inland rivers restricts the size of lifting equipment, especially cranes for cranes. Obviously, the height of the fixed A-frame meets the There is no height limit, which greatly limits the working area of ​​the crane. Therefore, there is an urgent need to develop large-scale lifting equipment wit...

AI Technical Summary

Problems solved by technology

With the increasing development of water projects in inland rivers, the demand for large-scale lifting equipment on water is increasing, and the height limit of inland rivers restricts the size of lifting equipment, especially cranes for cranes. Obviously, the height of the fixed A-frame meets the There is no height limit, which greatly limits the working area of ​​the crane

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