Dispensing Valve Internal Vent Passage for Fire Suppression
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Solution Overview
Problem
Conventional fire suppression systems face reliability issues due to vent port clogging from ice, particulate, or debris in harsh environments, which can impair the rapid dispensing of high-pressure fire suppressants.
Innovation Solution
A dispensing valve apparatus with a piston and check valve system that includes a vent passage within the valve body, allowing for internal pressure balancing and fluid flow communication, reducing reliance on external venting and minimizing the impact of debris accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an external vent port is used for pressure balancing, then the valve can rapidly dispense fire suppressant, but the vent port becomes susceptible to clogging from ice, particulate, or debris in harsh environments
Solution Approach 1:
The patent introduces an intermediary internal vent passage that mediates between the pressure balancing function and the environment. Instead of directly venting to the external environment through a vulnerable port, the system uses an internal passage that can be sealed by a check valve, thus protecting against external contaminants while maintaining pressure balancing capability
Solution Approach 2:
The venting function is segmented into separate controllable sections. The internal vent passage can be independently opened or closed by the check valve mechanism, allowing the system to separate the pressure balancing function from external environmental exposure. This segmentation enables selective activation of venting only when needed for pressure equalization
2Reliability
If the check valve is held closed to prevent leakage, then the system maintains pressure sealing, but the vent passage cannot vent pressure imbalances until activation
Solution Approach 1:
The check valve mechanism is designed to be self-actuating based on pressure differential. When pressure imbalance occurs, the force differential automatically opens the check valve to vent pressure, and when pressures equalize, the valve automatically closes. This self-service mechanism eliminates the need for external control systems while maintaining reliable pressure sealing
Solution Approach 2:
The patent replaces complex electronic or mechanical control systems with a purely mechanical pressure-differential actuated check valve. The valve responds automatically to pressure conditions without requiring external sensors, controllers, or power sources, thereby maintaining pressure sealing while avoiding excessive complexity
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
Enhances the reliability of fire suppression systems by ensuring consistent pressure balancing and rapid fluid dispensing, even in outdoor or harsh conditions, by maintaining internal fluid flow pathways and reducing the risk of clogging.
Implementation Method 1
the piston is located within the central cavity so as to block off the opening to a discharge passage... the piston is translated axially to a second position whereat the piston is repositioned into the upper chamber
Implementation Method 2
A spring biased check valve, operatively associated with an actuator cap disposed at distal end of the central cavity, prevents leakage of the gas from the upper chamber when the check valve is sealed against the actuator cap
Implementation Method 3
The valve is activated by forcibly translating the aforementioned check valve away from the end face of the actuator cap thereby opening a flow passage through which the gas pressure within the upper chamber rapidly vents to atmospheric pressure
Data Source
AI summary
A dispensing valve apparatus and method for rapidly dispensing fluid from a fluid reservoir of a pressure vessel include a piston translatable within a cavity that closes a discharge passage opening the cavity when positioned in a first position and opens the discharge passage to fluid flow from the fluid reservoir when positioned in a second position. The piston may be rapidly repositioned from its position to its second position by venting a cavity disposed between the piston and an actuator cap by selectively opening a check valve to vent the pressure within the cavity to the discharge passage.