Dual-Chamber Avalanche Triggering for Variable Gas Mixtures
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Solution Overview
Problem
Existing avalanche triggering devices face challenges with handling explosives, require costly installations, are limited by helicopter operations, and have compatibility issues with different gas mixtures due to unidirectional explosion chambers.
Innovation Solution
A dual-chamber explosion chamber design with a lower and upper half-chamber configuration that allows for gas mixtures of varying densities, enhancing shock wave power and directionality through baffles and elastic deformation, enabling remote operation and helicopter transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-direction explosion chamber is used, then the device structure is simple, but it is incompatible with gas mixtures of varying densities and lacks directional control
Solution Approach 1:
The explosion chamber is divided into two separate half-chambers (first and second) that can be assembled in different orientations. This segmentation allows the device to accommodate gas mixtures of varying densities by configuring the chambers to face upward or downward, providing versatility without requiring completely different chamber designs for each gas type.
Solution Approach 2:
The first and second half-chambers are nested or joined together to form a complete explosion chamber. This nested configuration allows flexible assembly where the chambers can be oriented in different directions (upward or downward), enabling compatibility with different gas mixture densities while maintaining a relatively simple overall structure.
2Reliability
If explosive charges are handled and placed by operators, then the triggering mechanism is simple and reliable, but operator safety is compromised and operations are regulated
Solution Approach 1:
The manual mechanical placement of explosive charges by operators is replaced with an automated system that uses gas mixture injection and ignition. The explosion chamber receives gas mixtures through injection devices and ignites them automatically, eliminating the need for operators to physically handle explosives while maintaining reliable avalanche triggering.
Solution Approach 2:
Gas mixtures serve as an intermediary substance that replaces direct explosive charge handling. Instead of operators placing solid explosive charges, the system injects and ignites gas mixtures within the explosion chamber, providing a safer intermediate step that maintains triggering reliability without direct explosive handling.
3Power
If a fixed installation with heavy civil engineering is used, then sufficient power and continuous operation are ensured, but installation and maintenance become difficult and dangerous
Solution Approach 1:
The system transitions from a fixed, heavy installation to a more dynamic, flexible configuration. The explosion chamber can be configured with chambers facing upward or downward and can be assembled in different orientations, allowing adaptation to various terrain conditions without requiring extensive civil engineering. This dynamic configurability maintains sufficient triggering power while reducing installation and maintenance difficulties.
Solution Approach 2:
The explosion chamber design provides universal functionality by accommodating different gas mixtures (hydrogen/oxygen, propane/oxygen, etc.) and different orientations (chambers facing upward or downward). This multi-functional design eliminates the need for specialized installations for different scenarios, reducing both installation complexity and maintenance requirements while maintaining adequate power.
4Ease of operation
If helicopter transport is used for device deployment, then accessibility to remote areas is improved, but operating costs increase and bad weather prevents intervention
Solution Approach 1:
The system is divided into transportable components (explosion chamber, gas injection devices, support structures) that can be delivered by helicopter to remote avalanche control areas. This segmentation allows the device to be transported in manageable parts, improving accessibility to remote locations while the modular nature helps control overall system weight and cost.
Solution Approach 2:
The system is designed to be self-sufficient once deployed, with on-site gas mixture preparation and ignition capabilities. The gas injection devices can fill the explosion chamber with appropriate gas mixtures locally, reducing the need for heavy pre-filled containers to be transported by helicopter, thereby reducing operating costs while maintaining deployment accessibility.
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 versatile and powerful avalanche triggering system that can handle various gas mixtures, improves safety by reducing explosive handling, and allows for flexible deployment and maintenance, while maintaining operational efficiency.
Implementation Method 1
A gas circuit 130 is used to fill the blast tube with oxidizer and fuel gas, which is ignited by an ignition device mounted at the rear of the tube. The resulting shock wave is then directed, through the tube's opening, towards the snowpack, thus triggering the avalanche.
Implementation Method 2
The resulting shock wave is then directed, through the tube's opening, towards the snowpack, thus triggering the avalanche.
Implementation Method 3
The first and second half-chambers are fixed to one another by elastic means 38, in this case springs. The elastic means allow the first and second half-chambers to deform relative to one another during the explosion, thus absorbing some of the explosion's energy and reducing damage to the explosion chamber.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The invention relates to an explosion chamber (2) for an avalanche triggering device comprising: - a lower half-chamber (4) closed at its lower end (6) and having an opening at its upper end (8), - an upper half-chamber (18) closed at its upper end (20) and having an opening at its lower end (22), characterized in that the lower end (22) of the upper half-chamber (18) extends around the upper end (8) of the lower half-chamber (4), or the upper end (8) of the lower half-chamber (4) extends around the lower end (22) of the upper half-chamber (18), so as to create at least one gas flow channel (34), the gas flow channel (34) comprising a baffle formed by the lower end (22) of the upper half-chamber (18) and the upper end (8) of the lower half-room (4).