Modular Tower Lifting Stand for Transmission Line Clearance
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Solution Overview
Problem
Aging transmission lines in power grids experience sagging due to expansion, leading to safety concerns and environmental interference, with traditional crane-based solutions being costly and resource-intensive.
Innovation Solution
A portable modular lifting stand system is used to raise transmission towers, allowing for the installation of a vertical extension section without requiring scheduled line outages, utilizing a trailer-mounted hydraulic lifting mechanism and outriggers for stabilization and remote operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a large crane is used to lift the transmission tower, then the transmission lines are raised to provide ground clearance, but the operational cost and resource requirement increase significantly
Solution Approach 1:
The lifting system is divided into modular components: a portable lifting stand with adjustable height sections, outriggers for stabilization, and a head assembly that attaches to the tower. This segmentation allows the system to be transported on a trailer and assembled at the job site, eliminating the need for expensive large cranes while achieving the same lifting function.
Solution Approach 2:
The patent introduces an intermediary lifting stand system that mediates between the ground and the transmission tower. This intermediate device provides the necessary lifting capability without requiring the direct intervention of a large crane, thereby reducing operational costs while maintaining the ability to raise the tower to the required height.
2Length of moving object
If a large crane is deployed to the job site, then the tower can be lifted, but substantial resources and manpower are required for staging and setup
Solution Approach 1:
The lifting stand is constructed from modular sections (first section, second section, third section) that can be easily assembled and disassembled. The outriggers are separately deployable and can be stabilized independently. This modular architecture dramatically reduces setup complexity compared to a large crane, which requires specialized beds, extensive staging, and coordinated manpower.
Solution Approach 2:
The lifting stand features adjustable and movable components including telescopic sections, deployable outriggers with leveling mechanisms, and a head assembly that can be positioned and secured at various heights. This dynamic design allows the system to adapt to different tower configurations and ground conditions without requiring complex pre-staging.
3Length of moving object
If traditional crane operations are used, then the tower can be raised, but scheduled line outages are required which disrupt power usage
Solution Approach 1:
The portable lifting stand system is designed to be pre-assembled and transported to the job site before work begins. The outriggers are pre-positioned and stabilized on the ground, and the head assembly is ready to attach to the tower. This preliminary preparation allows the lifting operation to proceed quickly and efficiently during a scheduled maintenance window, minimizing the duration of power outages compared to crane operations that require extensive on-site setup.
Data Source
AI summary
A tower lifting stand system and method is provided for use in lifting a large structure such as a transmission tower that is used in our power grid. A lifting mechanism engages a structure connected to the tower which work together to lift the tower once the lifting mechanism has been activated. Once the tower is lifted, a vertical extension section can be installed thus lifting the tower, and its associated power lines, vertically a predetermined distance.