Floating rear shelving single jib crane

Abstract

The invention provides a floating backward-placed single-boom crane. The floating backward-placed single-boom crane comprises a support (1) and an A frame (3) which are mounted on a ship body (101), wherein the bottom of a boom (2) is hinged to the top of the support (1); one end of a turnover auxiliary rod I (4) and one end of a turnover auxiliary rod II (5) are hinged to the support (1) together; a tightening steel wire rope (6) is tied between the other end of the turnover auxiliary rod I (4) and the other end of the turnover auxiliary rod II (5); a main hoist steel wire rope (7) is tied between the turnover auxiliary rod I (4) and the top of the boom (2); a pulley set (10) is mounted on the turnover auxiliary rod II (5); a fixed pulley (9) is mounted on the support (1); and a turnover steel wire rope (11) on a turnover winch (8) mounted on the ship body (101) passes through the pulley set (10) and then is wound on the fixed pulley (9). The floating backward-placed single-boom crane has the advantage of low cost.

Description

technical field [0001] The invention relates to a crane, in particular to a floating crane whose jib frame can be reversed and placed on a marine construction ship. Background technique [0002] At present, floating cranes (also known as floating cranes) are one of the essential devices for marine construction ships. With the continuous development of marine engineering, the weight and height of offshore modules continue to increase, and the requirements for floating cranes are also increasing. As it gets higher and higher, the length of the jib as the main force-bearing part of the floating crane is getting longer and longer, and its own weight is getting heavier and heavier. Therefore, during the towing process of the hull, the floating crane needs to lower the jib to lower the height, so as to reduce the height of the center of gravity, increase the stability and change the stress of the structure; [0003] For this reason, conventional offshore construction ships use fl...

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Problems solved by technology

[0003] For this reason, conventional offshore construction ships use floating cranes with a full-rotation structure; however, for floating cranes with a full-rotation structure, the price is high, and a large deck space is required for installation and layout. Undoubtedly, its cost has been further increased, which is not conducive to reducing engineering costs, and the floating crane with a full-slewing structure is limited by its structural form, resulting in a high center of gravity, which is not conducive to stability during towing and construction operations; therefore, it is urgent There is a need for a marine construction marine floating crane structure with a lower price and more market competitiveness while ensuring the construction quality

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