GAS METER AND GAS LEAKAGE INSPECTION METHOD

• Main Authors: KONISHI RYOHEI, TSUBOI KEN, SUGIMOTO NAOYA, YAMASHITA MASUMI, NAKATA KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 21.01.2022
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

To provide a gas meter and a gas leakage inspection method with which it is possible to save man-hours in inspecting inner pipes for leakage.SOLUTION: Provided is a gas meter 1 comprising a flow rate measurement unit 12 for measuring a gas flow rate and provided downstream of a gas valve 21 normally in an open state which is provided in the middle of an inner pipe P1 constituting a gas passage between an outer pipe P2 and gas appliances 22a-22c, a pressure measurement unit 13 for measuring gas pressure, and a control unit 10. The control unit 10 performs, when an inspection notification signal is inputted, an appliance state assessment process of assessing whether or not the gas appliances 22a-22c are in an unused state on the basis of the gas flow rate measured by the flow rate measurement unit 12, monitors for a given duration the gas pressure measured by the pressure measurement unit 13 and/or the gas flow rate measured by the flow rate measurement unit 12 after the gas valve 21 is closed after it is assessed that the gas appliances 22a-22c are in an unused state, and performs a gas leakage assessment process of assessing the presence of gas leakage on the basis of the gas pressure and/or gas flow rate during said monitoring.SELECTED DRAWING: Figure 1 【課題】 内管の漏洩検査の省力化を図ることができるガスメータ及びガス漏れ検査方法を提供する。【解決手段】 外管Ｐ２とガス器具２２ａ～２２ｃとの間のガス流路となる内管Ｐ１の途中に設けられた通常時開状態のガスバルブ２１よりも下流側に設けられ、ガス流量を計測する流量計測部１２と、ガス圧力を計測する圧力計測部１３と、制御部１０と、を備えたガスメータ１であって、制御部１０は、検査通知信号が入力されると、流量計測部１２で計測されるガス流量に基づいてガス器具２２ａ～２２ｃが不使用状態であるか否かを判定する器具状態判定処理を行い、ガス器具２２ａ～２２ｃが不使用状態であるとの判定後にガスバルブ２１が閉じられた後、圧力計測部１３で計測されるガス圧力及び／又は流量計測部１２で計測されるガス流量を所定時間監視し、この監視中におけるガス圧力及び／又はガス流量に基づいてガス漏れの有無を判定するガス漏れ判定処理を行う。【選択図】 図１