Frangible Plug Valve Mechanism with Shape Memory Alloy Actuator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing valve mechanisms for rapid fluid discharge, particularly in fire suppressant systems, are costly, require frequent maintenance, and rely on pyrotechnic cartridges, leading to fragmentation issues and handling restrictions.
Innovation Solution
A frangible plug with a shape memory alloy actuator that fractures circumferentially around a predefined plane, eliminating the need for pyrotechnic cartridges and reducing component complexity, while maintaining rapid fluid release and hermetic sealing options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If pyrotechnic cartridges are used to fracture the disc, then rapid fluid discharge is achieved, but fragmentation occurs and handling restrictions arise
Solution Approach 1:
The patent removes the pyrotechnic cartridge from the system entirely, extracting the harmful fragmentation-generating component while retaining the rapid discharge function through an alternative mechanism using a frangible plug and mechanical actuator
Solution Approach 2:
The frangible plug is designed as a disposable component that fractures cleanly to enable rapid discharge, eliminating the need for expensive refurbishment and maintenance associated with reusable valves containing pyrotechnic cartridges
2Ease of operation
If multiple moving components with O-ring seals are used, then valve functionality is achieved, but cost increases and maintenance requirements arise
Solution Approach 1:
The valve is segmented into a frangible plug component and a valve body, where the plug contains the sealing function and fractures to open the valve, separating the sealing function from complex moving components
Solution Approach 2:
Complex moving components with O-ring seals are extracted and replaced by the simpler frangible plug system that achieves valve operation through fracture rather than mechanical movement
3Duration of action of stationary object
If hermetically sealed valves with explosive cartridges are used, then service life is extended, but periodic maintenance and replacement are required
Solution Approach 1:
The frangible plug is designed as a disposable component that is replaced rather than repaired, eliminating periodic maintenance and replacement of expensive valve assemblies while ensuring hermetic sealing during service life
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 cost-effective, reliable, and maintenance-reduced valve mechanism with a clean fracture plane, ensuring efficient fluid discharge and hermetic sealing without pyrotechnic components, enhancing safety and operational efficiency.
Implementation Method 1
A frangible plug with a shape memory alloy actuator that fractures circumferentially around a predefined plane
Data Source
Figure 1A~1B
Figure 1C~1D
Figure 2~3B
AI summary
A frangible plug for use in a valve mechanism, the frangible plug comprising: a first section 1 having a first end 13 and an opposing second section 2 having a second end and a cylindrical sidewall 16 extending between the first and second ends; means 100 for applying a force on the cylindrical sidewall of the frangible plug such that the first section fractures from the opposing second section, and wherein the means for applying a force on said cylindrical sidewall extends circumferentially around the outer circumference of the sidewall.