Dual Mode Electropneumatic Flow Control Valve
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Solution Overview
Problem
Existing pneumatic flow control valves face challenges in maintaining consistent flow rates across a wide range of pressure drops, with balanced valves being complex and costly, and unbalanced valves having limited size and practicality issues, making it difficult to achieve uniform distribution and control in fluid systems.
Innovation Solution
A dual mode electropneumatic flow control valve integrates a proportional valve component with a pressure regulator component, regulating fluid pressure within a manageable range to enable consistent flow rates across varying pressures, while being small, lightweight, and insensitive to position or vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If balanced valve designs are used to maintain constant flow rate across pressure changes, then flow stability is improved, but device complexity and cost increase
Solution Approach 1:
The valve is divided into two functional segments: an unbalanced proportional valve component for flow control and a balanced pressure regulator component for pressure stabilization. This segmentation allows each component to perform its specialized function efficiently, resolving the contradiction between flow stability and device complexity.
Solution Approach 2:
A pressure regulator component acts as an intermediary between the incoming fluid source and the proportional valve. It stabilizes the upstream pressure to a manageable range, enabling the proportional valve to maintain accurate flow control without being directly exposed to wide pressure variations, thus reducing the complexity requirements of the main control valve.
2Device complexity
If unbalanced valve designs are used to simplify structure and reduce cost, then device complexity is reduced, but flow stability across pressure ranges deteriorates
Solution Approach 1:
The valve combines an unbalanced proportional valve (simple structure) with a balanced pressure regulator (flow stabilization function). The unbalanced valve provides mechanical simplicity and cost-effectiveness, while the pressure regulator segment compensates for flow instability, achieving both simplicity and stability.
Solution Approach 2:
The pressure regulator serves as a mediator that stabilizes the upstream pressure before it reaches the unbalanced proportional valve. This allows the simple unbalanced valve design to operate within a controlled pressure range, maintaining flow stability without requiring complex balanced valve mechanics.
3Ease of manufacture
If unbalanced valves are used to reduce capital cost and simplify design, then manufacturing cost is reduced, but the ability to handle large thrust forces deteriorates
Solution Approach 1:
The valve separates the flow control function (unbalanced proportional valve, easy to manufacture) from the pressure management function (balanced pressure regulator, handles thrust forces). This segmentation allows the main valve body to remain simple and cost-effective while the pressure regulator handles the force requirements.
Solution Approach 2:
The pressure regulator acts as an intermediary that manages pressure and thrust forces upstream, protecting the simple unbalanced proportional valve from excessive forces. This allows the valve to maintain manufacturing simplicity while still handling large thrust forces through the regulator component.
4Manufacturing precision
If balanced valves are used to achieve constant flow, then flow distribution accuracy is improved, but pressure drop across the valve increases
Solution Approach 1:
The valve separates pressure regulation (handled by the balanced regulator component with minimal pressure drop) from flow control (handled by the proportional valve). This segmentation allows the system to achieve accurate flow distribution while minimizing overall pressure loss, as the pressure regulator operates efficiently at stable pressures.
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 integrated valve provides consistent flow rates across a wide range of pressures, is mechanically simple, and cost-effective, making it suitable for various applications including medical products, with improved control and reduced complexity.
Implementation Method 1
dual mode electropneumatic flow control valve
Implementation Method 2
The actuator design is based on the thrust force which is required to open and close the valve, with the returning forced being supplied by either a spring or diaphragm
Implementation Method 3
electropneumatic control of pneumatically operated valves
Data Source
AI summary
An electropneumatic proportional flow control device improves electropneumatic control of pneumatically operated valves. A single integrated valve incorporates a proportional valve component in operational and physical coordination with a pressure regulator valve component. The flow path of fluid is initially passed through the regulator component whereby pressure is regulated to within a manageable range for operation of a balanced type proportional valve component.