Segmented Fire Protection Blanket for Tunnel Cable Safety
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Solution Overview
Problem
Existing fire protection solutions for inspection chambers in tunnels lack effective and easily removable fire protection that can maintain high safety standards during fires, particularly for cables and fluid conveyance systems.
Innovation Solution
A fire protection blanket composed of multiple fibrous subassemblies with mineral fibre wool layers separated by mineral fibre fabric, refractory particles, and a refractory adhesive, covered with fire-retardant silicone fabric, allowing for excellent fire resistance and easy handling and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fire protection solutions are used for inspection chambers in tunnels, then fire protection is provided, but the solutions are not easily removable and cannot maintain high safety standards during fires
Solution Approach 1:
The fire protection blanket is divided into multiple fibrous subassemblies (first, second, and third fibrous subassemblies) that can be independently arranged and removed. Each subassembly contains mineral fibre wool layers separated by mineral fibre fabric, allowing the blanket to be segmented for easier handling while maintaining overall fire protection effectiveness.
Solution Approach 2:
The blanket uses composite construction combining mineral fibre wool layers, mineral fibre fabric separators, refractory particles, refractory adhesive, and fire-retardant silicone impregnation. This composite structure provides enhanced fire resistance while maintaining flexibility for easy installation and removal.
2Reliability
If multiple layers of mineral fibre wool are used to improve fire resistance, then fire protection is enhanced, but the blanket becomes more complex and difficult to handle
Solution Approach 1:
The multiple mineral fibre wool layers are organized into distinct fibrous subassemblies separated by mineral fibre fabric. This segmentation provides structural organization that simplifies handling and installation while maintaining the multi-layer fire-resistant structure.
Solution Approach 2:
The mineral fibre fabric acts as a flexible separator and binding element between the mineral fibre wool layers, providing structural coherence while maintaining flexibility for easy handling and installation.
3Reliability
If refractory particles and adhesive are added to enhance fire protection, then safety during fires is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The refractory particles are pre-positioned within the mineral fibre wool layers during manufacturing, and the refractory adhesive is pre-applied to bond the fibrous subassemblies. This preliminary preparation simplifies the overall manufacturing process while ensuring fire safety performance.
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 blanket provides remarkable fire protection, allowing protected devices to operate without degradation for extended periods during simulated fires, meeting stringent safety requirements for tunnel installations.
Implementation Method 1
at least two fibrous subassemblies arranged substantially parallel to a principal surface of the blanket in which each fibrous subassembly comprises at least two mineral fibre wool layers... refractory particles are arranged inside at least one mineral fibre wool layer
Implementation Method 2
at least one layer of refractory adhesive attaching the fibrous subassemblies to each other
Implementation Method 3
a covering comprising a mineral fibre fabric impregnated with fire retardant silicone and enclosing all of the fibrous subassemblies
Data Source
AI summary
A fire protection blanket comprising: at least two fibrous subassemblies arranged substantially parallel to a principal surface of the blanket in which each fibrous subassembly comprises at least two mineral fiber wool layers, substantially parallel to the principal surface of the blanket, separated by at least one mineral fiber fabric and in which refractory particles are arranged inside at least one mineral fiber wool layer; at least one layer of refractory adhesive attaching the fibrous subassemblies to each other; and a covering comprising a mineral fiber fabric impregnated with a fire-resistant silicone and enclosing all of the fibrous subassemblies.