Push-Down Choke Valve Trim for Uniform Flow Distribution
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Solution Overview
Problem
Conventional fluid flow control valves suffer from uneven fluid distribution and unbalanced velocity and pressure profiles due to fluid taking the path of least resistance, leading to reduced choking performance and volumetric flow control.
Innovation Solution
A push-down-to-open high recovery choke valve design featuring a valve seat with convergent-divergent nozzles and a fluid control member that moves between closed and open positions, ensuring more even fluid distribution and a lower choke point, improving choking performance and volumetric flow control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional control valve design is used, then the valve structure is simple, but the fluid flow distribution is uneven and choking performance is reduced
Solution Approach 1:
The valve seat is segmented into multiple sections with different geometries (convergent section, parallel section, divergent section) to control fluid flow at different stages. This segmentation allows the valve to achieve balanced flow distribution and improved choking performance while maintaining a relatively simple overall structure.
Solution Approach 2:
Different sections of the valve seat are designed with locally optimized geometries: the convergent section accelerates fluid, the parallel section maintains pressure, and the divergent section reduces turbulence. This local quality approach ensures uniform flow distribution across the valve plug perimeter, improving choking performance without requiring complete structural redesign.
2Stability of the object's composition
If the valve seat geometry is optimized for even flow distribution, then fluid flow uniformity improves, but manufacturing complexity increases
Solution Approach 1:
The valve seat geometry is defined by specific parameter ranges (convergent angle, parallel section length, divergent angle) that can be adjusted within optimized boundaries. This allows manufacturers to produce valves with consistent flow characteristics using standard machining processes, balancing flow uniformity with manufacturing ease.
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 more uniform fluid flow and lower pressure drop, enhancing the efficiency and control of fluid flow through the valve, compared to conventional valves.
Implementation Method 1
The valve seat includes a first seat portion converging from a first diameter to a second diameter smaller than the first diameter and a second seat portion diverging from the second diameter to a third diameter larger than the second diameter
Implementation Method 2
a fluid control member movable relative to the valve seat to control fluid flow through the fluid passageway, wherein the fluid control member is movable from a closed position, in which the fluid control member sealingly engages the seating surface of the valve seat, and an open position, in which the fluid control member is spaced from the seating surface
Data Source
AI summary
A valve trim assembly configured to be disposed in a fluid flow control valve, including, a valve seat adapted to be disposed in a fluid passageway of the fluid flow control valve. The valve seat includes an annular flange and a seating surface spaced from the annular flange. The valve trim assembly additionally includes a fluid control member movable relative to the valve seat to control fluid flow through the fluid passageway, wherein the fluid control member is movable from a closed position, in which the fluid control member sealingly engages the seating surface of the valve seat, and an open position, in which the fluid control member is spaced from the seating surface, by moving the fluid control member away from the annular flange of the valve seat.