Diaphragm Valve Pressure Fitting for Linear Flow Control
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Solution Overview
Problem
Existing diaphragm valves exhibit nonlinear valve characteristics, leading to large fluid flow rate changes at small opening angles and minimal changes at maximum opening angles, making them unsuitable for precise flow control, and they suffer from durability issues due to constant stress, especially when handling aggressive media.
Innovation Solution
A diaphragm valve design incorporating an elastic deformation element, transmission element, and contour element with a convex curvature, which gently deforms the diaphragm to achieve a linear relationship between stroke and flow rate, ensuring durability and easy installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional diaphragm valve design is used, then the valve structure is simple, but the valve characteristic is nonlinear resulting in poor flow control precision
Solution Approach 1:
The pressure piece is divided into multiple independent parts (first pressure piece, second pressure piece, third pressure piece) that can move relative to each other. This segmentation allows different regions of the diaphragm to be controlled independently, enabling linear flow characteristic while maintaining a manageable structure through modular design
Solution Approach 2:
The valve employs dynamic movement of multiple pressure piece components where the first, second, and third pressure pieces move at different rates and directions. This dynamic configuration allows the valve to achieve linear flow characteristic through coordinated motion of multiple elements rather than a static design
2Adaptability or versatility
If the diaphragm is subjected to permanent stress to adjust valve characteristic, then the valve characteristic can be modified, but the diaphragm service life is reduced
Solution Approach 1:
Instead of permanently stressing the diaphragm, the invention uses dynamically movable pressure pieces that can adjust the valve characteristic through their motion. The first, second, and third pressure pieces move relative to each other to modify flow characteristics without imposing permanent stress on the diaphragm, thereby maintaining both adaptability and reliability
Solution Approach 2:
The valve characteristic is adjusted by changing the motion parameters of the pressure pieces rather than permanently deforming the diaphragm. By controlling the displacement, velocity, and acceleration of the first, second, and third pressure pieces, the system achieves variable flow characteristics while preserving diaphragm integrity and service life
3Strength
If a direct connection between actuator and diaphragm is used, then the structure is simple, but the diaphragm deformation is not gentle affecting durability
Solution Approach 1:
The actuation mechanism is segmented into first, second, and third pressure pieces that interact with different regions of the diaphragm. This segmentation allows gradual and distributed deformation of the diaphragm through multiple contact points moving in coordination, ensuring gentle deformation and enhanced durability
Solution Approach 2:
The invention introduces intermediate pressure piece components between the actuator and the diaphragm. These intermediate elements (first, second, and third pressure pieces) act as mediators that distribute and soften the actuation force, ensuring gentle diaphragm deformation while maintaining structural complexity at an acceptable level
4Measurement precision
If the valve opening angle is small, then the fluid flow rate is large due to nonlinear characteristic, but precise control is difficult
Solution Approach 1:
The control is segmented across multiple pressure pieces (first, second, third) that can be independently actuated. This segmentation allows precise control at small opening angles by coordinating the movement of each pressure piece to achieve linear flow characteristic, making the valve easier to operate with predictable response
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 design achieves a linear valve characteristic curve, ensuring precise fluid flow control and extended durability by gently deforming the diaphragm, reducing maintenance needs and allowing easy conversion of existing valves.
Implementation Method 1
the arrangement for diaphragm deformation comprises at least one elastic deformation element, a transmission element and a contour element
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a diaphragm valve comprising a diaphragm and a diaphragm deformation arrangement (14). The diaphragm deformation arrangement (14) interacts with a drive element. The diaphragm deformation arrangement (14) comprises at least one elastic deformation element (15), a transmission element (16), and a contour element (17) with a diaphragm contact surface (18). The elastic deformation element (15) is arranged between the transmission element (16) and the contour element (17).