Weight Distribution Hoisting Frame for Heavy Load Lifting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Heavy lift cranes often lack the necessary weight capacity to lift extremely heavy loads, such as petrochemical reactor vessels, posing a logistical challenge as only a few cranes worldwide are rated for such weights, and even those may not be timely or available.
Innovation Solution
The implementation of a weight distribution hoisting frame that offsets the lift position of heavy loads from their longitudinal midline, allowing multiple cranes with lower weight ratings to share the load, using trunion attachment arms, spreader bars, and cradling chucks to distribute the weight between multiple lifting apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a single heavy lift crane is used to lift the entire load, then the lifting capacity requirement is met, but such cranes are not available or do not exist for particularly heavy loads
Solution Approach 1:
The lifting system is segmented into multiple independent crane units that work together. Instead of relying on a single crane with enormous capacity, the load is divided and supported by multiple cranes with moderate capacity, making the system both feasible and adaptable to available equipment.
Solution Approach 2:
Multiple crane systems are merged into a coordinated lifting operation. The hoisting frame integrates multiple lifting points that connect to separate cranes, combining their forces to achieve the total lifting capacity needed for extremely heavy loads.
2Stability of the object's composition
If the lift position is centered on the longitudinal midline, then the load is balanced, but a single crane must carry the entire weight
Solution Approach 1:
The hoisting frame introduces asymmetric geometry with the spreader bar offset from the load's longitudinal midline. This asymmetric positioning creates unequal lever arms that distribute the load weight to multiple cranes, preventing any single crane from bearing the entire weight while maintaining load stability.
Solution Approach 2:
The problem is solved by adding a spatial dimension to the lifting arrangement. Instead of a single vertical lift point, the system uses multiple lift points distributed in space, with the spreader bar creating a three-dimensional configuration that distributes forces across multiple cranes positioned at different locations.
3Force
If multiple cranes are used to share the load, then the weight capacity requirement is met, but the lift position must be offset from the midline
Solution Approach 1:
The hoisting frame serves as an intermediary device between the load and multiple cranes. It includes the spreader bar and attachment mechanisms that mediate the force distribution, allowing multiple cranes to share the load while managing the geometric offset through its structural design.
Data Source
AI summary
Provided are weight distribution hoisting brackets and methods of using such brackets that offset a lifting position to an upper lifting mechanism off a center line of a heavy load to be lifted enabling sharing of the weight of a load to be lifted between at least two lifting mechanisms such as cranes such that lifting mechanisms may be employed that have a lower lifting weight capacity than the weight of the load.