Multi-Layer Wire Mesh Flame Arrestor for Safety Cabinets
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Solution Overview
Problem
Prior art safety cabinet flame arresting vents are ineffective in preventing external flames from entering the cabinet and igniting flammable mixtures inside.
Innovation Solution
A flame arrestor comprising multiple layers of corrosion-resistant wire mesh, arranged to absorb heat energy from incoming flames, preventing their propagation by ensuring gas molecules pass over multiple wire surfaces, thereby cooling below the combustion temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flame arresting vent is provided to release flammable vapors, then vapor release function is improved, but flame protection capability deteriorates
Solution Approach 1:
The patent employs wire mesh layers with specific pore sizes (opening dimensions between 0.02-0.1 inches) to create a porous barrier that allows vapor diffusion while blocking flame propagation. The porous structure provides sufficient surface area for heat absorption and cooling of the gas stream, resolving the contradiction between maintaining vapor release and preventing flame entry.
Solution Approach 2:
The invention changes physical parameters by stacking multiple wire mesh layers (minimum three layers) with controlled opening dimensions and thermal properties. This multi-layer configuration with specific geometric parameters creates cumulative heat absorption effects that cool the gas stream below combustion temperature, enabling vapor release while achieving flame arrestment.
2Reliability
If multiple wire mesh layers are added to prevent flame propagation, then flame protection capability is improved, but device complexity increases
Solution Approach 1:
The flame arrestor is segmented into multiple discrete wire mesh layers (minimum three layers) that can be individually manufactured and then assembled together. This segmentation allows each layer to perform the same flame-arresting function independently, and the modular structure simplifies installation and maintenance while achieving reliable flame protection through cumulative effect.
Solution Approach 2:
The invention uses composite construction by stacking multiple wire mesh layers with potentially different wire diameters, mesh sizes, or materials (e.g., stainless steel, aluminum). This composite approach enhances flame protection capability through varied thermal and structural properties while maintaining relatively simple individual component designs.
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
Effectively prevents external flame propagation into the safety cabinet by passively extinguishing flames through heat absorption, enhancing safety by ensuring no direct pathway for gas molecules to pass without heat loss, with a minimum of three wire mesh layers required for efficacy.
Implementation Method 1
A flame arrestor comprising multiple layers of corrosion-resistant wire mesh, arranged to absorb heat energy from incoming flames
Implementation Method 2
ensuring gas molecules pass over multiple wire surfaces, thereby cooling below the combustion temperature
Data Source
AI summary
A safety cabinet for storing flammable liquids is provided with a flame arresting vent. The flame arresting vent or “flame arrestor” allows flammable vapors inside the cabinet to leave the cabinet's interior but prevents flame from flowing into the cabinet's interior from outside the cabinet.