Tiltable Crane Mast Vertical Assembly in Confined Spaces
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Solution Overview
Problem
Large lattice boom cranes face challenges in assembly due to limited space at operation sites, such as petrochemical plants, where traditional assembly methods require extensive horizontal space and cannot efficiently handle inclined mast operations.
Innovation Solution
A crane design featuring a tiltable mast system with a receiving device, transfer device, locking mechanism, and fixing device allows for efficient assembly and disassembly in confined spaces by enabling the mast to pivot between construction and operating positions, reducing the required assembly space and allowing operation with the mast at various angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional assembly methods are used to assemble large lattice boom cranes, then the crane can be assembled, but extensive horizontal space is required at the assembly site
Solution Approach 1:
The patent transitions the assembly process from horizontal ground-based construction to vertical assembly within a confined area. The receiving device positioned on the crane base enables mast sections to be assembled vertically in the upward direction, converting the assembly dimension from horizontal to vertical, thereby reducing the required horizontal assembly space while maintaining assembly feasibility
Solution Approach 2:
The patent employs a tiltable mast system where the mast can pivot between a vertical construction position during assembly and an inclined operating position during crane operations. This dynamic positioning capability allows the mast to adapt between assembly and operational states, enabling space-efficient assembly while maintaining operational versatility
2Area of stationary object
If the mast is assembled in a vertical position, then assembly space is reduced, but the mast cannot operate in inclined positions required for certain hoisting jobs
Solution Approach 1:
The patent implements a tiltable mast system that dynamically transitions between vertical and inclined positions. The mast is equipped with a tilting mechanism allowing it to pivot from the vertical construction position to various inclined operating positions, thereby maintaining both space-efficient assembly capability and operational versatility for different hoisting requirements
3Area of stationary object
If a special ground-standing erection facility with assembly frame is provided, then space-constrained assembly is enabled, but the device complexity increases significantly
Solution Approach 1:
The patent integrates the receiving device directly onto the crane base, creating a multi-functional component that serves both as part of the crane's operational structure and as the assembly support during mast construction. This eliminates the need for separate specialized erection facilities, reducing device complexity while enabling vertical assembly in confined spaces
Solution Approach 2:
The patent merges the receiving device with the crane base structure, combining the assembly support function with the crane's existing base components. This integration eliminates the need for separate ground-standing erection facilities and assembly frames, thereby reducing overall device complexity while maintaining the capability for space-efficient vertical assembly
Data Source
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AI summary
Method for assembling and disassembling a crane (1) comprising a first tiliable mast (10) relative to the crane base (2) around a first mast pivot axis (16) into an inclined mast operating position and a receiving device (30), which is adapted to receive the mast section of the first mast.