Scissor Climbing Frame for Variable-Diameter Tower Access
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Solution Overview
Problem
Existing apparatuses for accessing and maintaining wind turbine towers face challenges in adapting to varying diameters, often requiring separate mechanisms and posing safety hazards due to the need for heavy cranes or suspending personnel.
Innovation Solution
A scissor structure apparatus that automatically adjusts its inner diameter to match the outer diameter of the tower by using a hoisting mechanism and gravity, eliminating the need for a separate diameter adaptation mechanism, while allowing for safe and efficient movement and surface treatment along the tower.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate expansion mechanism is used to adapt the apparatus diameter to the tower structure, then the apparatus can adjust to varying diameters, but the device complexity increases
Solution Approach 1:
The patent combines the hoisting mechanism and the diameter adaptation function into a single integrated system. The scissor structure serves dual purposes: it provides the lifting function while simultaneously adapting the apparatus diameter to match the tower structure through the interaction of lifting force and gravity, eliminating the need for a separate expansion mechanism
Solution Approach 2:
The scissor structure is designed to perform multiple functions: it acts as both the hoisting mechanism for lifting the apparatus and the adaptation mechanism for adjusting the diameter. This multi-functional design allows the same structural elements to achieve both lifting and diameter adaptation without requiring additional specialized components
2Reliability
If heavy cranes or lifts are used to provide access to the tower structure, then personnel can be safely transported, but the equipment weight and site requirements increase
Solution Approach 1:
The apparatus employs a dynamic scissor structure that can change its configuration and diameter as it is lifted along the tower. This dynamic design allows the apparatus to adapt to different tower diameters during the lifting process, eliminating the need for heavy, rigid crane systems while maintaining safety through controlled, incremental movement
Solution Approach 2:
The apparatus uses its own weight and the gravitational force acting on it as part of the adaptation mechanism. As the apparatus is lifted, gravity causes the scissor structure to contract or expand automatically to match the tower diameter, eliminating the need for additional heavy equipment or complex control systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables safe and efficient access and maintenance of wind turbine towers by automatically adjusting to varying diameters, reducing the need for heavy equipment and minimizing hazards, and facilitating surface treatments like cleaning and painting.
Implementation Method 1
an upwardly directed lifting force applied at the connecting points, in combination with gravity working on the frame structure, causes the frame elements to slide along the sliding rails
Data Source
AI summary
A plurality of sliding rails and a frame structure comprising a plurality of frame elements configured to be arranged at least partly circumferentially around a tower structure. Each frame element is slidably connected to at least one of the sliding rails, and the frame elements and the sliding rails are interconnected to form a scissor structure. An upwardly directed lifting force applied by a hoisting mechanism at connecting points at or near positions where the frame elements are connected to the sliding rails, in combination with gravity working on the frame structure, causes the frame elements to slide along the sliding rails, thereby causing the scissor structure to contract or expand to adjust a diameter of the frame structure to an outer diameter of the tower structure having the apparatus mounted thereon.