Flow-Limiting Core Geometry for Viscous Fluid Pressure Control
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Solution Overview
Problem
Conventional flow control valves face challenges with high viscosity fluids and inhomogeneous materials, leading to increased flow resistance, inefficiency, and reduced accuracy due to small inscribed circle radii of passage sections, which results in higher energy consumption and equipment wear.
Innovation Solution
A flow and pressure control device featuring a valve body with a flow limiting core and adjustment mechanism, where the flow limiting core has an inclined inwardly recessed surface, allowing for increased inscribed circle radius and reduced interference from impurities, enabling more precise control and lower material requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional flow control valves (ball valve, needle valve, gate valve) are used with traditional passage sections (olive shape, annular ring, sector section), then flow control function is achieved, but flow resistance increases and efficiency decreases under high viscosity and small pipe diameter conditions
Solution Approach 1:
The patent applies spheroidality by designing the flow control passage section with a circular cross-section and incorporating an inscribed circle within the passage. The circular passage geometry with optimized inscribed circle radius creates a more favorable flow path that reduces turbulence and resistance, particularly beneficial for high viscosity fluids. The curved, rounded geometry eliminates sharp corners and transitions that cause flow separation and energy loss.
2Measurement precision
If traditional flow control passage sections are used, then flow rate control is achieved, but accuracy and stability are reduced due to large particle size differences and impurities
Solution Approach 1:
The patent applies parameter changes by optimizing the inscribed circle radius parameter of the flow control passage section. By specifically designing the inscribed circle radius to be within a certain range (0.5-2mm in some embodiments), the passage geometry is tuned to accommodate particles of various sizes while maintaining precise flow control. This parameter optimization allows the passage to tolerate particle size variations and impurities without sacrificing control accuracy or stability.
3Volume of moving object
If small inscribed circle radius is used in conventional valves, then device size is reduced, but material wear increases and equipment lifespan decreases
Solution Approach 1:
The patent applies local quality by creating a localized optimized flow control section with a specifically designed inscribed circle within the passage. Instead of making the entire valve large, the invention focuses on optimizing the local geometry of the flow control passage where particles interact most with the valve components. This localized quality improvement allows smaller overall valve size while reducing wear at the critical flow control interface, thereby extending equipment lifespan.
Data Source
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AI summary
A flow and pressure control device, pertaining to the field of flow control or hydraulic transmission, and solving the problem in which the inscribed circle radius of a passage section of a conventional flow control valve is small and therefore not conducive to flow control and pressure transmission of an inhomogeneous fluid or a viscous fluid. The flow and pressure control device comprises: a valve body, a flow limiting core and an adjustment device The valve body comprises: an outlet pipe, a transition cavity and an inlet pipe having a circular or elliptical cross section. The flow limiting core can be completely inserted into the inlet pipe, and blocks a fluid passage of the inlet pipe. An inclined and inwardly recessed surface is provided at an end portion of the flow limiting core. The adjustment device is used to adjust the depth by which the flow limiting core is inserted into the inlet pipe. An operating section of the flow and pressure control device is approximately circular or approximately elliptical or is a combination of a partially circular shape and a partially elliptical shape. In the case where the invention has the same pass-through section proportions as the prior art, the diameter of passing particles are at least 2-10 times, thereby reducing the interference of impurities and fouling on operation the device, reducing energy consumption, and reducing wear and tear of the device.