Title:
EARTHQUAKE-SENSITIVE BREAKING RESTORATION METHOD, EARTHQUAKE-SENSITIVE BREAKING RESTORATION PROGRAM, CONTROL DEVICE CAPABLE OF EXECUTING THEM, AND GAS METER
Document Type and Number:
Japanese Patent JP2022037422
Kind Code:
A
Abstract:
To appropriately determine presence or absence of leakage of a secondary side even if gas equipment is used before breaking in the secondary side of a cutoff valve in restoration processing after earthquake-sensitive breaking.SOLUTION: An earthquake-sensitive breaking restoration method executes: instantaneous opening processing for opening a cutoff valve such that a pressure drop of pressure in a secondary side becomes equal to or more than a detectable pressure drop detection lower-limit threshold and the amount of inflow of gas from a primary side to a secondary side becomes the half or less of the amount of inflow of gas into the secondary side by normal leakage determination processing as normal leakage determination processing in the secondary side by using a pressure sensor after execution of earthquake-sensitive breaking processing; and leakage determination processing for determining presence or absence of leakage in the secondary side according to a degree of pressure drop in the secondary side detected by the pressure sensor after execution of the instantaneous opening processing.SELECTED DRAWING: Figure 2
Inventors:
MURANAKA ICHIRO
YASUI MASAHIRO
NISHIURA KATSUTOSHI
YASUI MASAHIRO
NISHIURA KATSUTOSHI
Application Number:
JP2020141551A
Publication Date:
March 09, 2022
Filing Date:
August 25, 2020
Export Citation:
Assignee:
OSAKA GAS CO LTD
International Classes:
G01F3/22; G01F1/66
Attorney, Agent or Firm:
Patent business corporation r&c