Manual Reset Actuator Assembly for Flow Valve Re-Blocking
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Solution Overview
Problem
Fire suppression systems require an efficient method to reset flow control valves after activation, ensuring reliable re-blocking of fluid flow to prevent accidental discharge and maintain system integrity.
Innovation Solution
A manual reset actuator assembly that includes a housing with a main drain, diaphragm release aperture, upper chamber, control port, and sealing assembly, utilizing a plunger and spring mechanism to manage fluid pressure and flow, allowing user-controlled resetting of the flow control valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manual reset actuator uses a plunger and spring mechanism to seal the diaphragm release aperture, then the system reliability is improved by preventing accidental discharge, but the device complexity increases due to additional components
Solution Approach 1:
The spring-loaded plunger mechanism automatically seals the diaphragm release aperture when the button is released, using the stored energy in the spring to maintain the sealed state without requiring continuous manual intervention or additional control systems
Solution Approach 2:
The plunger is pre-positioned in a spring-loaded ready-to-seal state, and the button mechanism allows users to temporarily override the seal only when intentional discharge is required, preventing accidental activation while allowing controlled operation
2Ease of operation
If the diaphragm release aperture is selectively fluidly coupled to the main drain, then the ease of operation is improved by allowing controlled fluid release, but the manufacturing precision requirements increase to ensure proper sealing
Solution Approach 1:
The plunger acts as a flexible sealing element that can deform to conform to the diaphragm release aperture geometry, compensating for minor manufacturing variations and ensuring reliable sealing without requiring extremely tight tolerances
Solution Approach 2:
The plunger serves as an intermediary component between the button control mechanism and the diaphragm release aperture, providing a mechanical interface that translates user input into precise sealing action while accommodating manufacturing tolerances
3Reliability
If the upper chamber fills with fluid to form pressure that exerts downward force on the plunger, then the reliability is improved by maintaining system pressure, but the device complexity increases due to the pressure control mechanism
Solution Approach 1:
The upper chamber uses fluid pressure (hydraulic principle) to exert a downward force on the plunger, maintaining the sealing action and system pressure control through simple fluid mechanics rather than complex mechanical linkages or electronic controls
Solution Approach 2:
The spring provides an upward counteracting force on the plunger that balances the downward fluid pressure force, creating a equilibrium system where the plunger remains sealed under pressure without requiring additional active control mechanisms
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
Enables reliable and user-initiated resetting of flow control valves, ensuring the system returns to a secure state by managing fluid pressure and flow effectively, preventing accidental discharge and maintaining system integrity.
Implementation Method 1
a spring is configured to couple to the diaphragm release aperture and a bottom of the plunger and exert an upward force on the plunger
Implementation Method 2
a plunger coupled to the button and configured to selectively seal a fluid flow path between the main drain and the diaphragm chamber port
Implementation Method 3
When the pressure in the upper chamber increases, the downward force on the plunger increases
Data Source
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AI summary
A manual reset actuator includes a main drain, a diaphragm release aperture fluidly coupled to a flow control valve, an upper chamber, a control port, a control orifice, an upper chamber supply orifice, and a sealing assembly, which includes a button, and a plunger. A pressure in the upper chamber exerts a downward force on the plunger. A spring exerts an upward force on the plunger. The fluid in the upper chamber is released via the control orifice, which lowers the pressure in the upper chamber, decreasing the downward force exerted on the plunger. When the downward force is less than the upward force, the spring forces the plunger upwards into an open configuration, which unseals the diaphragm release aperture. When the upward force is less than the downward force, the plunger remains in a closed configuration, which keeps the diaphragm release aperture sealed.