Balanced Port Housing Flow Conditioning for Gas Regulators
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Solution Overview
Problem
Conventional gas regulators experience 'droop' due to inadequate force balancing, leading to decreased outlet pressure, and turbulent flow conditions result in substandard pressure sensing, necessitating improved flow conditioning for accurate regulation.
Innovation Solution
The gas regulator incorporates a removable valve port with a flow conditioning mechanism featuring a screen with baffles to transition fluid flow from turbulent to laminar, enhancing pressure sensing accuracy and force balancing through a diaphragm and spring assembly with adjustable control pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional gas regulators use a simple valve port design, then the device complexity is low, but the flow conditioning is insufficient leading to turbulent flow and substandard pressure sensing
Solution Approach 1:
The valve port is segmented into multiple functional zones: an inlet portion, an outlet portion, and a flow conditioning portion with baffles. This segmentation allows each zone to perform its specific function - the flow conditioning portion with its baffles creates laminar flow patterns that improve pressure sensing accuracy in the outlet portion without requiring complete redesign of the entire valve port structure.
Solution Approach 2:
The flow conditioning portion with baffles acts as an intermediary element between the inlet and outlet portions of the valve port. It mediates the transition from turbulent to laminar flow, creating optimal flow conditions for pressure sensing without directly interfering with the inlet or outlet functions.
2Adaptability or versatility
If the regulator uses a removable valve port design, then the ease of repair and adaptability improve, but the device complexity increases
Solution Approach 1:
The removable valve port is designed with universal features that allow it to be adapted to different regulator sizes and configurations. The standardized connection interfaces and modular design enable the same basic valve port structure to serve multiple applications, improving versatility while maintaining reasonable complexity through standardization.
Solution Approach 2:
The valve port transitions from a fixed, permanent installation to a dynamic, removable component. This allows the valve port to be easily exchanged between different regulator assemblies, providing adaptability to various regulator sizes and applications while simplifying maintenance and repair operations.
3Device complexity
If the flow conditioning mechanism is integrated into the valve port, then the device complexity is reduced compared to separate components, but the manufacturing precision requirements increase
Solution Approach 1:
The flow conditioning mechanism is merged with the valve port by integrating the baffles directly into the flow conditioning portion of the valve port structure. This combination reduces the total number of separate components and assembly steps while concentrating manufacturing precision requirements into a single integrated component that can be manufactured and quality-controlled as one unit.
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 design ensures more accurate regulation of downstream pressure by converting turbulent flow to laminar, reducing 'droop' and improving the overall performance of the gas regulator, while being cost-effective and adaptable to various regulator sizes.
Implementation Method 1
a flow conditioning mechanism featuring a screen with baffles to transition fluid flow from turbulent to laminar
Implementation Method 2
improve force balancing through a diaphragm and spring assembly with adjustable control pressure
Data Source
Figure 1
Figure 2
Figure 3~9
AI summary
A gas regulator includes an actuator, a valve, and a balanced port housing disposed within the valve for flow conditioning to convert turbulent flow within the valve to laminar flow when the fluid reaches the sensing point of a Pitot tube disposed within the outlet of the valve. The balancing port housing includes an opening through a sidewall and disposed between a valve port of the valve and the outlet. The opening may include a partial obstruction, such as baffles or a mesh screen over which the fluid flows to convert the turbulent flow to laminar flow. The regulator may further include balanced trim having a balancing diaphragm in fluid communication with the upstream pressure to apply a force to a valve disc of the valve in the opposite direction of the force applied to the valve disc by the upstream pressure so that the upstream pressure does not affect the regulator's control of the downstream pressure.