Elevator Car Temporary Hoist Connection for Heavy Load Lifting
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Solution Overview
Problem
Existing elevator systems are overdimensioned to handle rare heavy loads, leading to increased energy consumption and costs, and inefficient methods for moving heavy objects like transformers within buildings.
Innovation Solution
A method and elevator arrangement that temporarily utilize a separate hoist to enhance lifting capacity, allowing the elevator car to support heavy loads beyond its nominal capacity without relying on the hoisting machine's energy, thereby reducing energy consumption and costs, and enabling controlled and safe lifting of heavy loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the elevator is dimensioned to handle heavy loads (greater than nominal load), then the lifting capacity is sufficient for special lifts, but the elevator system becomes heavier and consumes more energy during normal operation
Solution Approach 1:
The elevator system dynamically adapts its lifting capacity by switching between two operational modes: normal mode using the hoisting machine for standard loads, and special mode using the hoist for heavy loads. This dynamic reconfiguration allows the system to have high lifting capacity when needed without the permanent overhead of a heavily dimensioned hoisting machine, thereby reducing energy consumption during normal operation while maintaining the ability to handle exceptional heavy loads.
2Force
If the elevator is dimensioned to handle heavy loads, then the lifting capacity is sufficient for special lifts, but the manufacturing costs and installation costs increase
Solution Approach 1:
The elevator system achieves multi-functionality by combining two lifting mechanisms: the hoisting machine for normal operations and the hoist for heavy load operations. This universal design allows a single elevator installation to handle both standard and heavy loads, eliminating the need for separate specialized equipment and reducing overall manufacturing and installation costs compared to dimensioning the entire system for maximum capacity.
3Force
If a crane is used to lift heavy objects to the desired height outside the building, then the heavy load can be moved, but the method is awkward to implement and requires arranging special equipment
Solution Approach 1:
The elevator car serves as an intermediary platform that enables heavy load movement within the building's existing infrastructure. Instead of requiring external cranes and complex outdoor lifting operations, the hoist temporarily connects to the elevator car to lift heavy loads directly to the desired floor through the building's existing elevator shaft, significantly simplifying the operation and eliminating the need for external equipment arrangement.
Data Source
AI summary
Method for moving a heavy load, in which method the heavy load is lifted or lowered with an elevator including an elevator car and a hoisting machine, which hoisting machine is arranged to move the elevator car from one level to another in the normal operation of the elevator, in which method the heavy load is moved to be supported by the elevator car and the elevator car is moved until the load is at the desired height, and the load is removed from the support of the elevator car. In the method a hoist that does not belong to the hoisting machine is temporarily connected to the elevator car for the purpose of moving the load, and the elevator car, which supports the load, is moved by the hoist until the load is at the desired height, and the load is removed from the support of the elevator car.