Prefabricated Stair Tower Module for Wind Turbine Access
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Solution Overview
Problem
Existing ingress and egress systems for wind power towers, such as open ladder systems with fall arrest and electric lifts, require extensive training, special equipment, and maintenance, limiting access efficiency and posing challenges for emergency responses, especially in tall structures like wind towers.
Innovation Solution
A pre-fabricated stair tower module system that can be easily installed inside wind tower tube sections, allowing multiple personnel to ascend and descend simultaneously without special training or equipment, and requiring minimal maintenance, using hot dipped galvanized steel or aluminum materials, and does not need electricity for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If open ladder system with fall arrest is used, then access is provided to wind tower, but extensive training and certification are required, and special safety equipment is needed
Solution Approach 1:
The patent replaces complex, expensive safety systems (fall arrest equipment, electrical lifts) with a simple, permanent stair structure that requires no special equipment. The stair tower is a durable, low-maintenance solution that eliminates the need for disposable or complex safety gear.
Solution Approach 2:
The stair tower is divided into modular sections that can be pre-fabricated and assembled in place. This segmentation allows for easier installation and maintenance while providing a complete access solution that eliminates the need for complex integrated safety systems.
2Ease of operation
If electric lift system is used, then access is provided to wind tower, but electricity is required and maintenance is needed
Solution Approach 1:
The stair tower is a passive structure that requires no external energy input or active maintenance. It serves itself by providing gravity-based access without motors, power supplies, or control systems, eliminating all electricity requirements and associated maintenance.
Solution Approach 2:
The patent replaces the electrical lift system with a purely mechanical stair structure. This substitution eliminates the need for electrical components, motors, and control systems, providing a maintenance-free access solution that relies only on gravity and human effort.
3Ease of operation
If existing ingress and egress systems are used, then access is provided, but only one person can travel at a time in one direction
Solution Approach 1:
The stair tower provides a wide, multi-directional access path that allows personnel to move freely in any direction simultaneously. This dimensional expansion from narrow single-file passages to a broad stair structure enables multiple people to ascend and descend at the same time, dramatically improving productivity.
4Ease of manufacture
If conventional stair system is assembled inside horizontal tube, then access is provided, but assembly is impractical
Solution Approach 1:
The stair tower is pre-assembled into a complete modular unit at the fabrication plant before shipment. This preliminary assembly eliminates the complexity of on-site construction, allowing for simple installation by lifting and positioning the pre-built module into the horizontal tube, then standing the tube vertically.
Data Source
AI summary
A modular, prefabricated stair tower comprising a plurality of stairs, landings, handrails and hangers pre-assembled into a module configured such that it might be shipped and installed into a wind power tower tube section, with installation preferably occurring prior to shipment to the wind farm jobsite so that, when the tube section is erected vertically, authorized personnel gain immediate, efficient and economical access for ascending and descending large land based and offshore wind power turbine towers.