Check-Valve Piston for Fast Fire Suppression Agent Release
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Solution Overview
Problem
Fire suppression systems face delays in responding to electrical fires due to the need for localized hot gases to activate temperature-sensitive components, and water-based systems can exacerbate electrical fires, while pneumatic systems suffer from delayed agent delivery and potential cross-contamination.
Innovation Solution
An automatic valve design that uses pneumatic pressure to seal a valve opening during normal operation, which is overridden by pressurized fire suppression agents upon detection of abnormal heating, incorporating a check valve to prevent cross-contamination and minimize pressure loss, allowing for a larger diameter channel for efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-based sprinkler systems are used for fire suppression, then localised fires can be effectively doused, but electrical fires may be exacerbated and response time is delayed due to need for localized hot gases
Solution Approach 1:
The system pre-positions fire suppression agents directly at potential ignition points within electrical cabinets, eliminating the need for hot gas accumulation and localized activation. The agents are ready for immediate deployment upon detection of abnormal conditions, achieving preliminary preparation that eliminates response delays.
Solution Approach 2:
The invention extracts the fire suppression function from centralized water-based sprinkler systems and implements it at the distributed level within individual electrical cabinets. This allows each cabinet to be protected independently with appropriate agents, eliminating the harmful effect of water on electrical fires while maintaining effective suppression.
2Adaptability or versatility
If pneumatic systems with separate tube networks are used, then fire suppression agents can be delivered over broader areas, but response time is diminished by pressure loss detection delay
Solution Approach 1:
The invention merges the detection and activation functions into a single integrated unit within each electrical cabinet. The temperature-sensitive element directly controls the valve mechanism, eliminating the separate detection-then-activation sequence and associated time delays. This unified approach maintains broad coverage while achieving immediate response.
Solution Approach 2:
Each fire suppression unit is self-activating through temperature-sensitive elements that directly trigger valve opening. The system serves itself by using the thermal energy from the fire environment to automatically activate suppression without requiring external pressure loss detection or manual intervention, eliminating response delays.
3Speed
If manual actuators are installed for quick deployment, then operator intervention can rapidly deploy the system, but the system requires human presence and manual action
Solution Approach 1:
The system achieves automatic self-activation through temperature-sensitive elements that respond to thermal conditions and directly trigger valve opening. This eliminates the need for manual actuators or human presence, providing both rapid response and complete automation. The system serves itself by using environmental thermal energy to initiate suppression.
Solution Approach 2:
The invention replaces manual mechanical actuation with automatic thermal-mechanical activation. Temperature-sensitive elements convert thermal energy directly into mechanical valve opening, substituting human-operated mechanical actuators with autonomous thermal-mechanical systems that achieve both speed and automation.
4Reliability
If heat sensitive tubes are used for direct targeting, then the system can directly target the point of ignition, but the tubing must be in very close proximity to the equipment
Solution Approach 1:
The invention segments the fire suppression system into independent modular units that can be individually installed within or near each electrical cabinet. Each unit contains its own agent reservoir, valve, and temperature-sensitive element, allowing flexible installation positions while maintaining direct targeting capability through the localized activation mechanism.
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
This configuration enables quick and reliable automatic deployment of fire suppression agents, reducing response time and minimizing leakage, while preventing cross-contamination and optimizing valve design for efficient operation in hostile environments.
Implementation Method 1
pneumatic pressure is applied to the piston... the piston is configured to seal a valve opening when pneumatic pressure is applied to the piston
Implementation Method 2
the piston comprises a channel longitudinally therethrough and a check valve positioned within the channel such that fluid can enter the check valve in a first longitudinal direction but not in a second longitudinal direction
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
The present invention provides an automatic valve comprising a body configured to receive a piston axially therein, the piston being movable within the body between a first axial position in which the piston is configured to seal a valve opening when pneumatic pressure is applied to the piston and a second axial position in which the piston is configured to be withdrawn from the valve opening such that a fire suppression agent can enter the valve body through the valve opening, wherein the piston comprises a channel longitudinally therethrough and a check valve positioned within the channel such that fluid can enter the check valve in a first longitudinal direction but not in a second longitudinal direction.