Pneumatic Valve Flow Control With Fast Actuation Response
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Solution Overview
Problem
Existing pneumatic valve arrangements with fixed fluid flow are robust and low-cost but lack control, while those with variable fluid flow are complex and sensitive to component deviations, and both types have long response times.
Innovation Solution
A pneumatic valve arrangement with a valve-control unit that controls an actuator unit to provide variable fluid flow by associating actuation functions with target air flow characteristics, using a combination of movement frequency and supply pressure, and optionally incorporating a memory unit or electronic control unit for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed fluid flow pneumatic valve arrangement is used, then the device is robust, low-cost and simple to operate, but the fluid flow is constant and cannot be controlled
Solution Approach 1:
The patent applies dynamics by making the valve opening degree variable rather than fixed. The actuator unit can adjust the valve opening to different positions, enabling the fluid flow to be dynamically controlled according to demand, thus transforming a static system into a dynamic one that adapts to varying flow requirements
Solution Approach 2:
The patent changes the parameter of valve opening degree from a fixed value to a variable parameter that can be adjusted. By controlling the actuator unit to move the valve to different opening degrees, the system can regulate fluid flow rate, pressure, and other parameters to meet different operational requirements
2Adaptability or versatility
If a variable fluid flow section is used to control air flow, then different flow values can be provided, but the device becomes expensive, complex and sensitive to component deviations
Solution Approach 1:
The patent segments the control function by separating the actuator unit from the valve body. The actuator unit independently controls the valve opening degree without requiring complex internal valve structures, thus achieving flow control while maintaining simple valve hardware and reducing overall system complexity
Solution Approach 2:
The patent replaces complex mechanical flow control mechanisms (such as adjustable orifices, variable area valves) with a simpler actuator-driven valve opening system. This substitution reduces mechanical complexity and sensitivity to component deviations while maintaining effective flow control capability
3Adaptability or versatility
If a variable fluid flow section is used to control air flow, then different flow values can be provided, but the response time becomes longer
Solution Approach 1:
The patent uses periodic actuation of the actuator unit to control valve opening and closing. By applying periodic control signals to the actuator, the valve can rapidly respond to flow control demands with quick opening and closing actions, reducing response time while maintaining variable flow capability
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 controllable air flow at constant supply pressure, mitigating component tolerances and system diversity, and adapting movement frequency for fluent operation.
Implementation Method 1
a piston reciprocates in a cylinder in response to fluid pressure build-up in an actuating pressure chamber
Data Source
AI summary
A pneumatic valve arrangement is for controlling an air flow of compressed air. The valve arrangement includes a valve unit including an input port and an output port for receiving and providing compressed air and an actuator unit configured to actuate a pneumatic connection between the input port and the output port. A valve-control unit is configured to ascertain a respective actuation function associated with each of a plurality of available air flow characteristics, to ascertain, from the plurality of available air flow characteristics, a target air flow characteristic for delivering the compressed air by the pneumatic valve unit, and to control the actuator unit using the actuation function associated with the target air flow characteristic for delivering the compressed air in accordance with the target air flow characteristic.