Inflatable Air Barrier for Mine Refuge Isolation
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Solution Overview
Problem
Mining incidents often result in contaminated air with toxic gases, smoke, or low oxygen levels, necessitating a barrier that isolates safe refuge areas while maintaining breathable air quality without relying on mechanisms prone to corrosion or jamming.
Innovation Solution
An inflatable air barrier with a pneumatic seal and air-permeable sidewalls, featuring a resiliently compressible foam body and magnetic seals, provides a flexible and efficient means to separate contaminated and less contaminated areas, minimizing gas leakage and requiring less pressurized air for inflation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealed barriers are used to isolate contaminated areas, then gas leakage is minimized, but the barriers require complex mechanical mechanisms that are prone to corrosion and jamming
Solution Approach 1:
The patent replaces complex mechanical sealing mechanisms with a pneumatic seal system. Instead of using mechanical components that can corrode or jam, the invention uses pressurized air to inflate a flexible barrier that creates a seal through pneumatic pressure. This substitution of mechanical systems with pneumatic systems eliminates the reliability issues associated with mechanical corrosion and jamming while maintaining effective isolation of contaminated areas.
Solution Approach 2:
The invention employs pneumatic principles by using pressurized air to inflate the barrier structure. The pneumatic seal is created by inflating a flexible membrane or tube that expands to contact and seal against the passageway walls. This pneumatic approach provides a reliable sealing mechanism that is inherently resistant to corrosion and jamming, as it uses gas pressure rather than mechanical moving parts.
2Reliability
If impermeable barriers are used to prevent gas leakage, then isolation effectiveness is improved, but more pressurized air is required for inflation
Solution Approach 1:
The patent applies local quality by using air-permeable material selectively on the outer surface of the barrier that faces the contaminated area. This material allows controlled airflow and pressure equalization on the contaminated side while the inner surface maintains sealing effectiveness. By differentiating the permeability properties of different surfaces, the system achieves effective isolation with reduced pressurized air requirements, as the air-permeable outer surface prevents pressure buildup that would otherwise require additional pressurization.
Solution Approach 2:
The invention incorporates air-permeable (porous) material in the barrier construction, specifically on the outer surface exposed to the contaminated area. This porous material allows controlled passage of air and contaminants while maintaining the structural integrity and sealing function of the barrier. The use of porous material reduces the pressure differential across the barrier, thereby reducing the amount of pressurized air needed to maintain effective isolation.
3Strength
If rigid sealed structures are used to isolate areas, then structural strength is improved, but flexibility and adaptability to passageway shapes are reduced
Solution Approach 1:
The patent employs dynamic principles by using a flexible, inflatable barrier structure that can adapt its shape and size. The barrier transitions from a deflated state where it can be easily installed and conform to irregular passageway geometries, to an inflated state where it assumes its functional shape and creates effective seals. This dynamic transformation allows the structure to maintain adaptability throughout installation and operation, eliminating the need for rigid pre-formed structures.
Solution Approach 2:
The invention uses flexible shells in the form of inflatable membranes or tubes that can conform to various passageway shapes. These flexible structures provide sufficient structural strength when inflated with pressurized air, while maintaining the ability to adapt to irregular geometries. The flexible material allows the barrier to be installed in confined and irregular spaces, then inflated to create a strong, sealing structure that matches the specific passageway configuration.
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 inflatable air barrier effectively isolates safe refuge areas by minimizing gas leakage and reducing air requirements, ensuring a stable and breathable environment for miners during emergencies.
Implementation Method 1
The air permeable material allows controlled airflow through the barrier sidewall, enabling pressure equalization and reducing the amount of pressurized air needed for inflation
Implementation Method 2
magnetic seals, provides a flexible and efficient means to separate contaminated and less contaminated areas, minimizing gas leakage
Data Source
AI summary
Example inflatable air barriers are disclosed herein. Some example barriers disclosed herein include one or more inflatable tubes for maintaining a sealed airlock leading to an underground shelter. Such shelters provide miners with temporary refuge in the event of a mining incident involving the release of contaminated air. Some example barriers disclosed herein include one or more of the following: an inflatable tube with an air permeable section, a resiliently compressible foam body or other resilient member for supporting a deflated tube, a magnet for providing a secure seal, an inflatable tube with interchangeable end caps, elastic bands for securing the position of an inflatable tube, or an inflatable tube with one or more windows.