Fluid Flow Control Device Using Magnetic Diaphragm Actuation
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Solution Overview
Problem
Existing reducing valves are time-consuming to adjust pressure, limiting efficient control over liquid flow.
Innovation Solution
The device adjusts the annular gap between the first and second walls by moving the inner periphery relative to the outer periphery, changing the pressure pattern and forces on the valve body, allowing for control via pressure difference and deformation of a disc by an actuator, enabling quick adjustments in liquid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the annular gap width is adjusted by mechanical means in known reducing valves, then the pressure can be controlled, but the adjustment process becomes very time-consuming
Solution Approach 1:
The patent replaces the traditional mechanical adjustment mechanism with a magnetic field-based actuation system. Magnets are positioned behind the diaphragm to apply magnetic force, causing the diaphragm to deform and change the annular gap width without requiring mechanical screws or linkages. This substitution of mechanical adjustment with magnetic actuation enables rapid and precise pressure control.
Solution Approach 2:
The patent changes the physical state or properties of the system by using magnetic field strength as a controllable parameter. By varying the magnetic field intensity (through magnet position or strength), the diaphragm deformation is controlled, which in turn adjusts the annular gap width and the resulting pressure. This parameter-based control allows for quick adjustment without mechanical intervention.
2Productivity
If the valve body position is changed to control liquid flow, then the flow rate can be adjusted, but the adjustment is dependent on liquid pressure making it difficult to control
Solution Approach 1:
The patent introduces a diaphragm as an intermediary element between the magnetic actuation system and the valve body. The diaphragm transmits magnetic force to adjust the annular gap width independently of the liquid pressure acting on the valve body. This intermediary allows the control mechanism to operate independently from the high-pressure liquid environment, making adjustment easier and more predictable.
Solution Approach 2:
The patent segments the control function into two independent parts: the magnetic actuation system that controls diaphragm deformation, and the valve body that responds to liquid pressure. By separating the control mechanism from the pressure-affected component, the system achieves pressure-independent adjustment capability while maintaining fast response.
3Speed
If a large deformation is applied to the disc to achieve quick flow changes, then the response time is reduced, but the mechanical complexity and potential for leakage increases
Solution Approach 1:
The patent uses a flexible diaphragm (thin film) instead of a rigid disc that requires large mechanical deformations. The diaphragm's inherent flexibility allows it to respond quickly to magnetic forces with minimal deformation, achieving fast flow changes without complex mechanical mechanisms. The thin film structure naturally provides the needed compliance while maintaining sealing integrity.
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
This solution allows for rapid and precise control of liquid flow by changing the gap shape, achieving quick changes in liquid flow rates and pressure relief, independent of liquid pressure.
Implementation Method 1
there is a pressure difference between the internal channel and the second chamber for a short time. As a result of this, the disc is deformed and the valve body moves away from the disc for a short time
Implementation Method 2
the disc is deformed and the valve body moves away from the disc
Implementation Method 3
The valve body 6 is forced by a spring 2 in the direction of the axis 4 towards the diaphragm 18
Implementation Method 4
the average pressure in said gap causes the forces upon the valve body to change, and the valve body will move until there is a new state of equilibrium in the forces upon the valve body
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a device for controlling a liquid flow, comprising a housing, a valve body which can be moved in a direction of movement in the housing and has an internal channel which is in communication with a first pipe connection, and a first chamber which is in communication with a second pipe connection, which first chamber has, more or less perpendicular to the direction of movement, a first annular sealing surface against which a second annular sealing surface of the valve body can rest in a sealing manner under the influence of pressure means, and thereby produces a first seal with an annular gap having two walls which are formed by the annular sealing surfaces. According to the invention, one of the walls comprises a thin ring with an inner periphery and an outer periphery or a thin disc with a centre and an outer periphery, the inner periphery or the centre being capable of moving elastically in the direction of movement relative to the outer periphery.