Differential Pressure Control Valve for Precise Flow Regulation
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Solution Overview
Problem
Existing control valves with automatic flow rate regulation are structurally complex, expensive, and cumbersome, leading to irregular flow patterns due to multiple moving parts and variable geometry configurations, which negatively impact the regularity and precision of fluid flow.
Innovation Solution
A control valve design featuring a central driving spindle with a cup-shaped body and spring mechanism, where fluid circulation occurs in conduits and chambers mainly parallel to the spindle, decoupling the cup-shaped body's axial movement from the driving spindle, reducing transients and allowing precise regulation of differential pressure and flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If control valves are equipped with automatic regulation and flow rate control devices, then flow rate control precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the differential pressure regulation function and flow rate control function into a single integrated valve body structure. The cup-shaped body with rolling membrane serves both pressure sensing and flow regulation purposes, eliminating the need for separate regulation devices and reducing overall structural complexity while maintaining precise control capabilities.
Solution Approach 2:
The cup-shaped body performs multiple functions simultaneously: it acts as a pressure sensor through the rolling membrane, serves as a flow restriction element, and provides automatic regulation. This multi-functional design reduces the number of components needed while achieving both differential pressure maintenance and precise flow rate control.
2Extent of automation
If multiple moving parts are used for regulation functions, then automatic regulation capability is improved, but flow regularity deteriorates
Solution Approach 1:
The patent removes traditional springs and complex mechanical linkages from the valve structure. The cup-shaped body with rolling membrane directly senses differential pressure and translates it into flow regulation without intermediate mechanical components, eliminating flow disturbances caused by spring vibrations and mechanical play while maintaining automatic regulation.
Solution Approach 2:
The rolling membrane acts as an intermediary element that converts differential pressure changes into positional changes of the cup-shaped body, which in turn regulates flow. This indirect mechanism provides smooth, vibration-free automatic regulation compared to direct spring-loaded mechanisms.
3Adaptability or versatility
If variable geometry configurations are used for control, then adaptability is improved, but flow regularity deteriorates
Solution Approach 1:
The cup-shaped body dynamically adjusts its position along the spindle axis in response to differential pressure changes, automatically adapting the flow restriction geometry to maintain constant flow rate. This dynamic adjustment occurs without mechanical linkages, ensuring smooth and regular flow throughout the adjustment range.
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 results in a simpler, more compact valve with improved flow regularity and precision, ensuring fine and rapid automatic regulation of flow rates while minimizing the influence of moving parts on fluid dynamics.
Implementation Method 1
a spring operatively interposed between the valve body and the cup-shaped body to push said cup-shaped body away from the flow shutter
Implementation Method 2
a rolling membrane having a radially inner edge fixed to the cup-shaped body and a radially outer edge fixed to the valve body
Data Source
AI summary
A control valve including: a valve body, a flow shutter operatively interposed between an inlet and an outlet, a driving spindle having at least a first actuating end and a second end connected to the flow shutter. The valve also includes a differential pressure automatic regulation device, comprising: a cup-shaped body arranged around the driving spindle and axially mobile with respect to said driving spindle; a spring operatively interposed between the valve body and the cup-shaped body to push the latter away from the flow shutter; a rolling membrane having a radially inner edge fixed to the cup-shaped body and a radially outer edge fixed to the valve body to delimit a first chamber in fluid communication with the inlet and a second chamber in fluid communication with the outlet.