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Fluid pressure reduction devices

A technology of pressure reducing device and fluid, applied in the direction of valve absorbing fluid energy, valve device, transportation and packaging, etc., can solve the problems of reducing the total flow capacity of the control valve, blocking or flow obstruction of the fluid pressure reducing device, etc.

Active Publication Date: 2011-05-04
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this noise reduction technique is that it reduces the overall flow capacity of the control valve and makes the fluid pressure reducing device susceptible to clogging or flow obstruction

Method used

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  • Fluid pressure reduction devices
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Examples

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Embodiment Construction

[0021] The exemplary fluid pressure relief devices disclosed herein can be used to reduce noise and / or pressure generated in a process fluid, such as a gas or liquid, in a process fluid handling system. Unlike known fluid pressure relief devices having circular or rectangular holes, the exemplary fluid pressure relief devices described herein are implemented using holes with relatively larger wetting perimeters than known holes. Furthermore, the exemplary apertures used to implement the exemplary fluid pressure relief devices described herein provide a relatively large wetting perimeter while providing fluid passages with apertures of a cross-sectional area comparable to those used to form passages in known fluid pressure relief devices. The cross-sectional areas of the holes are approximately the same or equal. In other words, the exemplary fluid pressure relief devices described herein employ apertures having a wetted perimeter to area ratio that is relatively greater than t...

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Abstract

An example fluid pressure reduction device includes a hollow cylinder having an inner surface and an outer surface and a plurality of passageways extending between the inner and outer surfaces. Each passageway delimits an aperture having a cross-sectional area and a wetted perimeter that is greater than a second wetted perimeter of one of a circle-shaped aperture or a rectangle-shaped aperture having the same cross-sectional area as one of the passageways.

Description

technical field [0001] The present invention relates generally to fluid pressure reduction devices, and more particularly, to fluid pressure reduction devices for use in process fluid handling systems. Background technique [0002] In the process control industry, many control valve applications, such as power generation or petroleum refining applications, result in unacceptable levels of aerodynamic noise from the resulting process conditions. For example, a generally acceptable level of aerodynamic noise is about 85 dBA measured 1 meter downstream of the control valve line and 1 meter away from the control valve line. It should be appreciated that a fluid pressure reducing device implemented as a valve trim or a vent diffuser can significantly reduce the noise generated in various process applications. The physical and hydrodynamic mechanisms of these fluid pressure relief devices and the prediction of aerodynamic noise in fluid pressure relief device applications have be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K47/08
CPCF16K47/08Y10T137/86791Y10T137/86734F16K3/243F16K47/14
Inventor 迈克尔·威尔帝·麦克蒂
Owner FISHER CONTROLS INT LLC