Hoisting mechanism of multi-lifting-point joint crane

Abstract

The invention relates to a hoisting mechanism of a multi-lifting-point joint crane, adopting double wound roll, steel wire rope multi-layer wrapping and symmetrical rope dropping types, and adopting the type that lifting hook connecting pieces are respectively hinged or fixedly connected with corresponding lifting hook groups through pin rolls. The invention has novel structure, solves a series of problems that deflection angles of steel wire ropes of a super-heavy large-span crane is not easy to be ensured, horizontal wrapping distance of the steel wire rope is too long, the efficiency of the mechanism is tool low, self-locking is easily caused for the mechanism, lifting joints are not synchronous, construction difficulty is large, and the like, has the characteristics of security, reliability and strong practicability, can avoid fatal security risk, is suitable for the crane with 10000-ton super-large hoisting duty, and is especially suitable for the multi-lifting-point joint crane for lifting when a marine drilling platform form abutting joint with subsections.

Description

Technical field [0001] The invention relates to the hoisting and transporting machinery industry, in particular to a multi-lifting point crane hoisting mechanism with a 10,000-ton level super large hoisting capacity. Background technique [0002] With the domestic concept of "offshore drilling platform segmented docking and overall hoisting" in recent years, it is necessary to have supporting cranes to complete the lifting of 10,000-ton equipment such as drilling platforms. Compared with traditional cranes, the lifting capacity of this crane has increased by one. Order of magnitude, it can reach 20,000 tons or more, and the span and lifting height of the crane reach more than 100 meters. In order to minimize the single hook lifting weight and improve the stability of the lifting, the super heavy lifting technology scheme is generally used. This process plan requires multiple sets of hoisting mechanisms to be hoisted together. In order to reduce the weight of the components on the...

AI Technical Summary

Problems solved by technology

[0005] 3. The hoisting points of a single set of hoisting mechanisms cannot be lifted synchronously, and electric synchronous mechanisms need to be installed, and high coordination of the electrical system is also required;

[0006] 4. The pulley magnification is too large, the lifting transmission efficiency is low, the energy loss is large, and self-locking is easy to occur;

[0007] 5. The hoisting mechanism and guide pulleys rotate at a certain angle relative to the main girder due to the single-connected drum and the lowering of the rope in the opposite span, so that the requirements for the deflection angle of the wire rope can be guaranteed, which brings great inconvenience to the construction and installation

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