MULTISTAGE PRESSURE REDUCTION DEVICE AND BOILER
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United States of America Patent
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Jul 21, 2016
app pub date -
Aug 14, 2014
filing date -
Oct 31, 2013
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Abstract
A multistage pressure reduction device (10) of the present invention includes a fuel pipe (1) forming a flow path (5), an upstream orifice plate (2) disposed in the flow path (5), and a downstream orifice plate (3) disposed downstream of the upstream orifice plate (2) in the flow path (5). The upstream orifice plate (2) is formed such that a jet flow (7-i) discharged from a hole (6-i) formed at the upstream orifice plate (2) contacts a certain target. With this multistage pressure reduction device (10), the jet flow (7-i) discharged from the upstream orifice plate (2) contacts the certain target to prevent air column resonance excited between the upstream orifice plate (2) and the downstream orifice plate (3). Noise due to the air column resonance can be reduced without providing a porous metal between the upstream orifice plate (2) and the downstream orifice plate (3).
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