Non-Circular Pinch Valve Tube for Linear Fluid Flow Control
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Solution Overview
Problem
Existing pinch valve systems lack a linear response in controlling fluid flow, requiring significant compression before achieving proportional flow control, limiting their effectiveness.
Innovation Solution
A pinch valve tube with a non-circular open interior, featuring bell-shaped sides, provides a more linear relationship between compression and fluid flow by utilizing an elastic material that stores and releases energy, allowing for proportional control with less compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional circular cross-sectional pinch valve tube is used, then the structure is simple and easy to manufacture, but the response between compression and fluid flow is non-linear, requiring significant compression before achieving proportional flow control
Solution Approach 1:
The patent applies asymmetry by changing the cross-sectional shape from a traditional circle to a non-circular shape with flattened sides and bell-shaped curves. This asymmetric geometry creates different stiffness characteristics in different directions, enabling the tube to exhibit more linear elastic deformation behavior under compression, thus achieving proportional flow control with less compression while maintaining ease of manufacture through extrusion or molding processes
2Measurement precision
If a non-circular cross-sectional pinch valve tube is used, then the linear response and control precision are improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the cross-section from a simple circle to a complex shape defined by flattened sides and bell-shaped curves. This geometric parameter change fundamentally alters the elastic deformation characteristics of the tube, enabling more linear and predictable flow control. The manufacturing complexity is managed by using standard extrusion or molding processes that can accommodate these geometric parameters without requiring complex assembly or machining operations
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 pinch valve tube achieves a greater deflection range and finer control over fluid flow, enhancing the linear response and reducing the amount of compression needed for proportional flow control compared to traditional circular cross-sectional designs.
Implementation Method 1
utilizing an elastic material that stores and releases energy, allowing for proportional control with less compression
Data Source
AI summary
A pinch valve tube includes an open interior through which a fluid can be conveyed. The open interior is non-circular and can be defined by two opposing sides which, when the pinch valve tube is compressed, move toward one another in a more linear fashion than a circular cross section of the open interior. In one form the open interior is defined by a first side which has a bell shape. The bell shape can include a central head connected to opposing flattened lips by opposing waist sides, respectively. The second side can be a mirror image of the first side. In some forms the second side may not be a mirror image. An outer surface of the pinch valve tube can include a central flat upon which an anvil and support surface can be engaged to compress the pinch valve tube.