Pressure Regulating Valve Segmented Tapping Pipe
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Solution Overview
Problem
Conventional internal pressure tapping type pressure regulators exhibit poor flow accuracy and rapid pressure drop in the flow accuracy range due to their straight-through type internal pressure tapping structure.
Innovation Solution
The pressure regulating valve incorporates a pressure tapping pipe connected to communicating passages between the valve body and actuator chambers, with the pipe's suspended end aligned along the gas or fluid flow direction, and optionally features dual symmetrical passages on the guide device, improving pressure sensing and reducing pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a straight-through type internal pressure tapping structure is used, then the structure is simple, but the flow accuracy is poor and pressure drop is rapid
Solution Approach 1:
The pressure tapping structure is segmented into multiple components: a pressure tapping passage, a pressure tapping pipe, and a suspended end section. This segmentation allows the pressure sensing function to be separated from the main flow path, enabling improved flow accuracy while maintaining structural simplicity. The pressure tapping pipe extends from the passage and suspends into the flow direction, creating distinct functional zones that resolve the contradiction between simplicity and precision.
Solution Approach 2:
The pressure tapping pipe acts as an intermediary element between the pressure tapping passage and the downstream pressure sensing point. This intermediary structure allows pressure to be sensed at a specific location without directly interfering with the main flow path, thereby improving flow accuracy measurements while keeping the overall structure relatively simple.
2Device complexity
If a straight-through type internal pressure tapping structure is used, then the structure is simple, but pressure drop occurs rapidly
Solution Approach 1:
By segmenting the pressure tapping into a separate pipe structure that suspends into the flow direction, the main flow path remains unobstructed. This segmentation prevents the pressure tapping structure from causing rapid pressure drop, while still allowing accurate pressure sensing. The suspended end of the pressure tapping pipe creates a minimal interference with the flow, resolving the contradiction between structural simplicity and pressure maintenance.
Solution Approach 2:
The pressure tapping pipe extends in the direction along the gas or fluid flow direction, utilizing the longitudinal dimension rather than obstructing the cross-sectional flow path. This dimensional approach allows pressure sensing without creating significant flow resistance, thereby reducing pressure drop while maintaining a simple structural configuration.
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 configuration enhances the performance of the pressure regulator by slowing pressure drop and improving flow accuracy, as demonstrated by performance curves showing improved performance compared to conventional designs.
Implementation Method 1
a passage (12) in communication with the chamber (23) of the valve body, the chamber of the actuator, and a pressure tapping pipe (13) to sense the downstream pressure of the valve body
Data Source
AI summary
A pressure regulating valve including an actuator and a valve body. Communicating passages are arranged between a chamber of the valve body and a chamber of the actuator. Further, a pressure tapping tube is disposed in the chamber of the valve body. One end of the pressure tapping tube is connected to the communicating passage and the other end of the pressure tapping tube is suspended. By adopting this pressure tapping structure in the pressure regulating valve, the performance of the pressure regulating valve in a flow accuracy range is improved.