MULTISTAGE PRESSURE REDUCTION DEVICE AND BOILER

Title:

MULTISTAGE PRESSURE REDUCTION DEVICE AND BOILER

Document Type and Number:

WIPO Patent Application WO/2015/064180

Kind Code:

A1

Abstract:

This multistage pressure reduction device (10) is equipped with: a fuel pipe (1) forming a flow path (5); an upstream orifice plate (2) arranged in the flow path (5); and a downstream orifice plate (3) arranged downstream from the upstream orifice plate (2) in the flow path (5). The upstream orifice plate (2) is formed such that a jet flow (7-i) sprayed from a hole (6-i) formed in the upstream orifice plate (2) interferes with something. Because the jet flow (7-i) sprayed from the upstream orifice plate (2) of this multistage pressure reduction device interferes with something, it is possible to prevent the generation of air-column resonance between the upstream orifice plate (2) and the downstream orifice plate (3), and thus it is possible to reduce unwanted noise caused by air-column resonance without providing porous metal between the upstream orifice plate (2) and the downstream orifice plate (3).

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Inventors:

SUGANUMA NAOKI (JP)
OKIMOTO TAKAHIRO (JP)
YAMADA TETSUYA (JP)
KAWAMOTO NOBORU (JP)
YAMANOUCHI SHUN (JP)

Application Number:

PCT/JP2014/071440

Publication Date:

May 07, 2015

Filing Date:

August 14, 2014

Export Citation:

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Assignee:

MITSUBISHI HITACHI POWER SYS (JP)

International Classes:

F16L55/00; F16L55/02; F23K5/00

Foreign References:

JPH0512891U	1993-02-19
JPS5645690U	1981-04-23
JPH01312296A	1989-12-18
JPS57157189A	1982-09-28
JP2000213733A	2000-08-02
JPS6060304A	1985-04-06
JPH0425094U	1992-02-28