Convoluted Thermal Sleeve Resolving Flexibility and Insulation Trade-off
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Solution Overview
Problem
Existing tubular sleeves for protecting elongate members from heat are costly and have limited flexibility, making them prone to damage when bent, crushed, or routed over meandering paths due to their rigid and inflexible nature.
Innovation Solution
A thermally insulative, reflective convoluted sleeve is designed with a resilient inner layer, an outer metal foil layer, and an intermediate impervious polyester film layer, which are convoluted and bonded with a thermoset adhesive to enhance flexibility and prevent damage during compression or routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid and incompressible wall is used in the sleeve, then thermal protection effectiveness is improved, but flexibility and ability to be routed over meandering paths deteriorates
Solution Approach 1:
The patent applies this principle by using a convoluted wall structure with multiple layers including an inner resilient layer, an intermediate impervious layer, and an outer reflective layer. The convoluted geometry allows the wall to flex and compress while maintaining its protective functions, enabling the sleeve to be routed over meandering paths without damage.
Solution Approach 2:
The patent implements composite materials by combining three distinct layers: an inner resilient layer for flexibility and crush resistance, an intermediate impervious layer for thermal insulation, and an outer reflective layer for heat reflection. This composite structure achieves both thermal protection effectiveness and flexibility simultaneously.
2Strength
If the sleeve wall is made incompressible, then structural integrity is improved, but ability to be radially compressed and routed deteriorates
Solution Approach 1:
The patent applies dynamics by creating a wall that transitions from rigid to flexible through convolution. The convoluted structure allows the wall to dynamically adapt its stiffness - maintaining structural integrity when needed while enabling radial compression and routing when required, resolving the contradiction between strength and ease of operation.
3Ease of manufacture
If a simple single-layer structure is used, then manufacturing cost is reduced, but protective performance and flexibility deteriorate
Solution Approach 1:
The patent uses composite materials with three specialized layers, each contributing specific protective properties. While multi-layer construction increases manufacturing complexity, the use of conventional materials and processes keeps costs manageable while significantly improving protective performance compared to single-layer alternatives.
Solution Approach 2:
The convoluted geometry applied to the multi-layer structure provides enhanced flexibility and crush resistance without requiring thick walls, maintaining manufacturing feasibility while improving protective performance through intelligent structural design rather than simply increasing material quantity.
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 sleeve provides enhanced flexibility and maintains its protective properties even when crushed or compressed, allowing it to be routed over complex paths without compromising its thermal insulation and reflectivity.
Implementation Method 1
the outer layer is constructed having an outer reflective surface exposed to the surrounding environment
Implementation Method 2
The intermediate layer is constructed of an impervious sheet material and is sandwiched in abutment with the inner and outer layers
Implementation Method 3
the inner layer and the intermediate layer are bonded to one another with a thermoset adhesive
Data Source
AI summary
A thermally insulative, reflective convoluted sleeve and method of construction thereof is provided. The sleeve includes a resilient inner layer, an outer layer and a resilient intermediate layer sandwiched between the inner and outer layers. The inner layer has an inner surface exposed to an inner cavity of the sleeve and the outer layer has an outer reflective surface exposed to the surrounding environment. The intermediate layer is an impervious sheet material and is sandwiched in abutment with the inner and outer layers. The inner, outer and intermediate layers are convoluted to provide the sleeve with enhanced thermal protection properties and flexibility.