Fusible Fire-Proof Cut-Off Valve With Anti-Accidental Closure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fire-proof emergency cut-off valves have complex structures that make it easy to accidentally cut off the valve, posing a risk during emergencies.
Innovation Solution
A fusible fire-proof emergency cut-off valve with a swing check valve and control mechanism, featuring a fusible pin that melts in high temperatures to drive the valve plate to block the outlet, using a spring-loaded piston and shifting fork system to ensure automatic and accidental-free valve closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex structure is used in the fire-proof emergency cut-off valve, then the valve can achieve reliable fire-proof function, but the valve is prone to accidental closure and causes user trouble
Solution Approach 1:
The patent extracts the fire-responsive function into a separate fusible pin component that melts at a specific temperature, decoupling it from the mechanical valve closure mechanism. This allows the fire-proof function to be reliably triggered by temperature alone, while the mechanical structure remains simple and less prone to accidental activation.
Solution Approach 2:
The patent uses a fusible pin with a specific melting point temperature parameter that changes from solid to liquid state under fire conditions. This phase change provides a reliable thermal trigger that activates the valve closure only when the temperature exceeds the pin's melting point, ensuring fire-proof reliability without false activation.
2Ease of operation
If a simple structure is used in the fire-proof emergency cut-off valve, then the valve is easier to operate and less prone to accidental closure, but the fire-proof function may be compromised
Solution Approach 1:
The patent introduces a shifting fork as an intermediary mechanical component that translates the linear motion of the piston rod into rotational motion of the valve plate. This simple mechanical intermediary ensures reliable force transmission from the fire-triggered piston to the valve closure mechanism, maintaining fire-proof function while keeping the overall structure simple.
Solution Approach 2:
The spring-loaded piston rod system is designed to automatically activate and drive the valve closure mechanism without external intervention. The spring stores potential energy that is automatically converted to kinetic energy when the fusible pin melts, enabling the valve to self-activate and close reliably during fire emergencies.
3Extent of automation
If a fusible pin mechanism is added to trigger valve closure, then the valve can automatically close in fire emergencies, but the structure becomes more complex
Solution Approach 1:
The piston rod serves multiple functions: it acts as a structural support component, a thermal trigger carrier (holding the fusible pin), a force transmission element (connected to the spring and shifting fork), and an actuator for valve closure. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in structural complexity while achieving automatic closure.
Solution Approach 2:
The fusible pin is nested within or attached to the piston rod structure, and the shifting fork is nested within the cylinder body. This nesting arrangement allows multiple components to occupy the same spatial envelope, minimizing the overall volume and structural complexity added by the automatic closure 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
The valve can promptly and reliably cut off the flow in emergency situations, reducing the risk of accidental closures and simplifying the structure for easier use and wider adoption.
Implementation Method 1
a fusible pin automatically fuses in high temperature environment of a fire disaster
Implementation Method 2
which allows a spring to drive the piston rod to move
Data Source
AI summary
A fusible fire-proof emergency cut-off valve is provided. Two sides of a valve body are communicated with an outlet and an inlet, respectively. The inside of the valve body is rotationally connected with a rotating shaft. A valve plate is fixed to one side of the rotating shaft and is positioned at one end of the outlet. A control mechanism comprises a shifting fork box body, one side of the shifting fork box body is connected with a second cylinder, and the other side of the shifting fork box body is connected with a first cylinder. The other side of the rotating shaft is inserted into the shifting fork box body and fixedly connected with a shifting fork. The inside of the second cylinder is provided with a piston rod penetrating through the shifting fork box body and the first cylinder.