Shape Memory Alloy Lifting Device for Sewer Inspection
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Solution Overview
Problem
Existing sewer inspection and cleaning systems face challenges with space-consuming and wear-prone pneumatic/hydraulic lifting devices, which are inefficient in maintaining pipes with small diameters and require frequent maintenance.
Innovation Solution
A lifting device utilizing shape memory elements that change shape in response to temperature variations, allowing for compact design and reduced maintenance needs, with a mechanism that includes a shape memory alloy wire and a control system to adjust the lifting unit's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pneumatic/hydraulic lifting devices are used, then lifting function is achieved, but device occupies large space and requires frequent maintenance
Solution Approach 1:
The patent replaces pneumatic/hydraulic lifting mechanisms with a shape memory alloy-based lifting device. The shape memory element (Nitinol wire) directly converts thermal energy to mechanical lifting motion, eliminating the need for complex pneumatic/hydraulic systems with multiple components, thereby reducing space consumption and maintenance requirements.
Solution Approach 2:
The patent utilizes the temperature-dependent shape change properties of shape memory alloy. By changing the temperature parameter (heating the Nitinol wire), the material transitions between austenite and martensite phases, causing reversible shape changes that drive the lifting motion, thus achieving lifting function through parameter change rather than mechanical fluid systems.
2Ease of operation
If pneumatic/hydraulic telescopic arms are used, then lifting capability is provided, but device complexity and space requirements increase
Solution Approach 1:
The patent substitutes complex pneumatic/hydraulic telescopic arm mechanisms with a simple shape memory alloy wire system. The Nitinol wire directly generates lifting force through its shape memory effect, eliminating the need for telescopic stages, seals, valves, and fluid reservoirs, thereby dramatically reducing system complexity while maintaining lifting capability.
Solution Approach 2:
The patent extracts and eliminates the intermediate mechanical transmission components (telescopic arms, linkages, valves) from the lifting system. Only the essential shape memory element and its mounting structure remain, achieving lifting capability through direct actuation by the shape memory alloy wire.
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
The solution provides a space-saving, low-maintenance lifting device that can efficiently align inspection or cleaning equipment within pipes of varying diameters, reducing wear and extending maintenance intervals.
Implementation Method 1
the adjusting means has at least one shape memory element which changes its shape reversibly as a function of at least one influencing variable, the change in shape of the shape memory element causing the lifting unit to move relative to the base support
Data Source
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AI summary
The invention provides a lifting device (1) for an inspection system (10) and/or cleaning system, in particular for lifting a camera device (3) or a rinsing device, comprising a base support (4) and a lifting unit (2) movable relative to the base support (4). The lifting device (1) has at least one actuating means for moving the lifting unit (2) that interacts with it. The actuating means has at least one shape memory element (20) which reversibly changes its shape depending on at least one influencing factor. The shape change of the shape memory element (20) causes the lifting unit (2) to move relative to the base support (4). Furthermore, an inspection system (10) and/or cleaning system is provided that includes a lifting device (1) according to the invention.