Three-Way Valve Assembly With Magnetic Diaphragm Flow Sensing
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Solution Overview
Problem
Existing fluid application systems require separate valves for different flow rate requirements, as they are designed for a single flow curve over a range of fluid pressures, necessitating multiple valve assemblies for varying performance.
Innovation Solution
A three-way valve assembly with a diaphragm drip check and a sensing assembly that includes a plunger, diaphragm, magnet, and sensor, allowing for interchangeable travelers and springs to adjust flow rates based on pressure differentials and sensor feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single traveler and spring are sealed within the valve assembly for a single flow curve, then the valve assembly is designed to output flow rates according to a single flow curve over a range of fluid pressures, but different valve performance requires obtaining a separate valve
Solution Approach 1:
The valve assembly is designed with a universal housing that can accommodate multiple interchangeable travelers and springs, allowing a single valve body to perform multiple flow curve functions. This eliminates the need for separate valve assemblies for different performance requirements.
Solution Approach 2:
The valve assembly transitions from a static single-configuration design to a dynamic multi-configuration design where travelers and springs can be interchangeably positioned. This allows the flow characteristics to be adjusted and changed based on different operational requirements.
2Adaptability or versatility
If multiple valve assemblies are obtained for varying flow rate requirements, then different flow curves are achieved, but the number of valve assemblies increases
Solution Approach 1:
A single valve assembly housing is designed to universally accept multiple travelers and springs, enabling one physical valve to replace multiple specialized valves. This reduces the quantity of valve assemblies needed while maintaining the ability to achieve varying flow rates.
Solution Approach 2:
The valve system is segmented into interchangeable components (travelers and springs) that can be independently selected and combined. This modular approach allows different flow characteristics to be achieved by changing components rather than replacing entire valve assemblies.
3Measurement precision
If a traveler position sensor is added to detect traveler position within the housing, then flow rate detection is enabled, but the device complexity increases
Solution Approach 1:
The sensing system replaces complex mechanical position detection with a magnetic field-based sensor. A magnet coupled to the traveler interacts with a magnetic sensor, eliminating the need for mechanical switches or complex mechanical feedback mechanisms while achieving precise position detection.
Solution Approach 2:
A magnet is introduced as an intermediary between the traveler and the sensor. This magnet serves as a mediator that translates the traveler's physical position into a detectable magnetic field signal, enabling non-contact position sensing.
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 customizable flow rates and variations through interchangeable components, facilitating precise control and detection of fluid flow characteristics in agricultural fluid application systems.
Implementation Method 1
at least one magnet coupled to the diaphragm and generating a magnetic field, and a sensing assembly... such that the at least one sensor is affected by the at least one magnet as the plunger is displaced within the sensing chamber
Data Source
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AI summary
A three-way valve assembly includes a housing assembly and a diaphragm drip check. The housing assembly defines an inlet, a return outlet, a dispensing outlet, a return flow path extending from the inlet to the return outlet, and a dispensing flow path extending from the inlet to the dispensing outlet. The diaphragm drip check includes a plunger and a diaphragm retained within a sensing chamber, at least one magnet coupled to the plunger and generating a magnetic field, and a sensing assembly. The plunger is operatively coupled to the diaphragm such that deflection of the diaphragm causes corresponding displacement of the plunger. The sensing assembly includes a printed circuit board and at least one sensor, the printed circuit board positioned on the housing assembly such that the at least one sensor is affected by the at least one magnet as the plunger is displaced within the sensing chamber.