A crane having a pivoting lift arm. The crane has first and second main lift systems configured for independent operation. Each system includes a lift cable, an upper pulley block, a lift pulley assembly suspended from the upper pulley block in a multiple descent configuration by the lift cable, and a lift winch. The upper pulley blocks of the first and second main lift systems are each independently pivotable relative to the lift arm about a common pivot axis. Each lift block assembly includes a lift block body, a plurality of fixed pulleys secured to the lift block body, and a plurality of disconnectable pulley members, each disconnectable pulley member including a frame and at least one pulley rotatably supported by the frame.
一种具有枢转升降臂的起重机。起重机具有第一和第二主升降系统,主升降系统配置为用于独立操作。每个系统包括升降缆索、上滑轮组、通过升降缆索以多重下降配置从上滑轮组悬挂下来的升降滑车组件、以及升降绞盘。第一和第二主升降系统的上滑轮组每个均可以围绕共同的枢转轴相对于升降臂独立地枢转。每个升降滑车组件包括升降滑车体、固定在升降滑车体上的多个固定滑轮、以及多个可断开滑轮构件,每个可断开滑轮构件包括框架和由框架可旋转地支撑的至少一个滑轮。
Crane, vessel comprising such crane and method for erecting elongated structure
起重机、包括这种起重机的船舶以及用于竖起细长结构的方法
2022-08-02
Patent
Electronic Resource
Chinese
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