Pressure-Actuated Reversing Valve Magnetic Reset Mechanism
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Solution Overview
Problem
Pressure-actuated switching valves in sanitary facilities face instability and control oscillation issues due to the use of springs, which can lead to incorrect switching and valve movement back and forth when pressure is released.
Innovation Solution
A pressure-actuated switching valve using a magnet to reset the valve closing body, where the restoring force decreases with distance, preventing control oscillations and ensuring stable operation by only resetting when pressure drops further.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used to reset the valve closing body, then the valve can be reset when pressure is released, but the restoring force remains constant leading to unstable conditions and control oscillation
Solution Approach 1:
The patent replaces the mechanical spring-based restoring force system with a magnetic field-based restoring force system. The magnet generates a magnetic force that acts on the ferromagnetic component in the valve closing body, providing a restoring force that naturally decreases with distance, thereby eliminating the constant force problem of springs and preventing control oscillation.
Solution Approach 2:
The patent changes the parameter of restoring force from constant (spring) to distance-dependent (magnetic field). By utilizing the inherent characteristic of magnetic field strength decreasing with distance from the magnet, the system achieves a restoring force that automatically adapts to the valve closing body's position, ensuring stable switching without oscillation.
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 magnetic reset mechanism ensures stable and correct switching without oscillations, maintaining valve stability and preventing unwanted movement, thus ensuring reliable operation.
Implementation Method 1
the restoring force of a magnet decreases as the distance from its counter-element increases... the valve closing body is returned to the starting position with the help of at least one magnet
Implementation Method 2
the pressure exerted by the water on the piston surface is used to actuate the valve closing body
Data Source
Figure 1~3
Figure 4
AI summary
The reversing valve has intake opening, outlet openings (10,11), and valve closing structure (12). The valve closing structure is moved in the starting position by applying pressure of the flowing water. The outlet (10) is closed and an outlet (11) is opened with respect to increase of distance of the valve closing structure from the initial position by providing the magnets (5,18).