Title:
GAS EMERGENCY TRIP DEVICE
Document Type and Number:
Japanese Patent JP2001336700
Kind Code:
A
Abstract:
To provide a gas emergency trip device detecting a change of flow speed, when a rapid change of pressure is generated in the upstream where the gas interrupting device is installed, so as to display warning in the case that the change is caused by re-liquefaction of gas.
In this constitution, a flow speed in a medium is detected in a flow speed detection means 14, a changed gradient of the flow speed is detected in a changed gradient detection means 21, when a periodic change in a change of the flow speed is detected in a periodic change detection means 22 by the changed gradient of the detected flow speed, re-liquefaction is decided, an alarm information is given by an information means 23 when the re- liquefaction is decided.
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Inventors:
UEKI KOICHI
NIIMURA NORIO
ASANO KAZUTAKA
MIZUKOSHI JIRO
ISONO NOBORU
HORI FUJIO
NIIMURA NORIO
ASANO KAZUTAKA
MIZUKOSHI JIRO
ISONO NOBORU
HORI FUJIO
Application Number:
JP2000157924A
Publication Date:
December 07, 2001
Filing Date:
May 29, 2000
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
TOYO GASMETER CO
TOYO GASMETER CO
International Classes:
F17D5/06; G01F1/66; G01F3/22; G01F15/06; G01F1/00; (IPC1-7): F17D5/06; G01F1/00; G01F1/66; G01F3/22; G01F15/06
Domestic Patent References:
| JP2000146637A | 2000-05-26 | |||
| JP2000146658A | 2000-05-26 | |||
| JPH109498A | 1998-01-13 | |||
| JPH0476800A | 1992-03-11 | |||
| JPH06186110A | 1994-07-08 |
Attorney, Agent or Firm:
Ishihara Masaru
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