Manual Reset Actuator Assembly for Diaphragm Valve Reclosing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fire suppression systems require an efficient method to reset flow control valves after activation, ensuring reliable operation and preventing accidental discharge of fire suppressants.
Innovation Solution
A manual reset actuator assembly that includes a housing, 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 is designed with a plunger and spring mechanism to control fluid pressure, then the reliability of valve resetting is improved, but the device complexity increases
Solution Approach 1:
The reset actuator is divided into functional segments: an upper chamber for pressure accumulation, a plunger for flow control, and a spring for reset force. This segmentation allows each component to perform its specific function reliably while maintaining overall system manageability
Solution Approach 2:
The spring mechanism provides automatic reset functionality when pressure conditions are met, eliminating the need for external intervention. The system self-regulates through the interaction between pressure buildup in the upper chamber and the spring's restoring force
2Reliability
If the plunger is designed to seal the diaphragm release aperture under pressure, then prevention of accidental discharge is improved, but the ease of operation decreases
Solution Approach 1:
The plunger is positioned to preemptively seal the diaphragm release aperture before pressure can cause accidental discharge. The spring pre-load ensures the plunger maintains sealing contact, preventing harmful effects before they can occur
Solution Approach 2:
The plunger acts as an intermediary element between the upper chamber pressure and the diaphragm release aperture. It mediates the pressure force, allowing controlled operation while preventing unintended discharge through its sealing function
3Force
If the upper chamber is designed to accumulate fluid pressure for actuation, then the force for valve control is improved, but the volume of the actuator increases
Solution Approach 1:
The system changes the pressure parameter in the upper chamber to generate sufficient force for valve control. By increasing pressure rather than volume, the system achieves the required actuation force while minimizing the actuator's physical size
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-controlled resetting of flow control valves, preventing accidental discharge of fire suppressants and ensuring the system returns to a safe state after activation.
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
When the pressure in the upper chamber increases, the downward force on the plunger increases
Data Source
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.