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Title:
STRAIGHTENING DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/025226
Kind Code:
A1
Abstract:
A straightening device (4) installed in a flow passage (10) formed by a pipe (2a) on the upstream side of a flow velocity sensor (3) of a flowmeter, comprising a first straightening net (8) disposed apart from the flow velocity sensor and a second straightening net (6) disposed close to the flow velocity sensor, wherein the first straightening net has meshes smaller than those of the second straightening net to exclude foreign matter included in fluid so as to prevent the second straightening net from being clogged by the foreign matter, and the flow of the fluid around the flow velocity sensor is stabilized by the straightening action of the second straightening net to prevent the measuring accuracy of the fluid sensor from being lowered by the disturbance of the flow of the fluid.

Inventors:
YAO TAKASHI (JP)
TAMURA HIROSHI (JP)
NUKUI KAZUMITSU (JP)
KOMAKI MITSUNORI (JP)
TASHIRO TAKASHI (JP)
OSHIMA EIICHI (JP)
ISHITANI SATOSHI (JP)
Application Number:
PCT/JP2003/011095
Publication Date:
March 25, 2004
Filing Date:
August 29, 2003
Export Citation:
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Assignee:
YAMATAKE CORP (JP)
TOKYO GAS CO LTD (JP)
TAKENAKA SEISAKUSHO CO LTD (JP)
YAO TAKASHI (JP)
TAMURA HIROSHI (JP)
NUKUI KAZUMITSU (JP)
KOMAKI MITSUNORI (JP)
TASHIRO TAKASHI (JP)
OSHIMA EIICHI (JP)
ISHITANI SATOSHI (JP)
International Classes:
G01F1/00; F15D1/02; G01F15/12; G01P5/00; (IPC1-7): G01F1/00; G01F15/12
Foreign References:
JPH0518795A1993-01-26
JPS60161825U1985-10-28
JP2001241979A2001-09-07
JPH02221817A1990-09-04
JPH0742599A1995-02-10
Attorney, Agent or Firm:
Nagato, Kanji (8-1 Shinbashi 5-chom, Minato-ku Tokyo, JP)
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