JPH07139976A - Leakage inspection method on recovery in fluidic gas meter - Google Patents
Leakage inspection method on recovery in fluidic gas meterInfo
- Publication number
- JPH07139976A JPH07139976A JP29058693A JP29058693A JPH07139976A JP H07139976 A JPH07139976 A JP H07139976A JP 29058693 A JP29058693 A JP 29058693A JP 29058693 A JP29058693 A JP 29058693A JP H07139976 A JPH07139976 A JP H07139976A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- shutoff valve
- emergency
- emergency shutoff
- cutoff valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measuring Volume Flow (AREA)
- Examining Or Testing Airtightness (AREA)
- Emergency Alarm Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、流体振動を発生させて
この流体振動からガスの流量を求める計量方式のフルイ
ディックガスメータにおいて、緊急遮断弁が作動したの
ち、この復帰時に行う漏洩検査方法に適用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a leak detection method for a fluidic gas meter of a metering system which generates a fluid vibration and obtains a gas flow rate from the fluid vibration after the emergency shutoff valve is actuated. Applied.
【０００２】[0002]
【従来の技術】ガスメータにおいて、ガスの使用状況を
マイコンで監視し、使用状況が異常の場合、或いは一定
震度以上の地震等が発生した際に、例えば緊急遮断弁を
作動させてガスの流れを遮断するように構成した膜式マ
イコンガスメータが公知である。2. Description of the Related Art In a gas meter, the usage status of gas is monitored by a microcomputer, and when the usage status is abnormal or when an earthquake with a certain seismic intensity or more occurs, for example, an emergency shutoff valve is operated to change the gas flow. Membrane microcomputer gas meters configured to shut off are known.
【０００３】このガスメータの場合、緊急遮断弁が作動
した後、ガスの供給を再開するためには、この緊急遮断
弁を復帰させることが必要となる。この際、いきなり緊
急遮断弁を開放すると、例えばガス器具の栓が開放され
ていて生ガス流出の危険があったりするため、次のよう
な手順を踏んでから緊急遮断弁を開放している。In the case of this gas meter, it is necessary to restore the emergency cutoff valve in order to restart the supply of gas after the emergency cutoff valve is activated. At this time, if the emergency cutoff valve is suddenly opened, for example, the plug of the gas appliance may be opened, and there is a danger of raw gas outflow. Therefore, the emergency cutoff valve is opened after the following procedure.
【０００４】先ず、緊急遮断弁を２分間開き、この間に
計量膜が１周期動くと流量パルスが１パルス発生するの
で、このパルスの入力があった場合には再度緊急遮断弁
を閉じてガス漏れ状況の確認を行い、パルスの入力がな
い場合にはそのまま緊急遮断弁を開いたままにする。First, the emergency shutoff valve is opened for 2 minutes, and one pulse of the flow rate is generated when the metering membrane moves for one cycle during this period. Therefore, when this pulse is input, the emergency shutoff valve is closed again and gas leakage is caused. Check the situation and if there is no pulse input, leave the emergency shutoff valve open.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記の漏洩確
認方法の場合、次のような欠点がある。 ａ．２分間緊急遮断弁を開いてパルスの発生を確認する
ことは、一台の場合はとにかく、例えば地震などにより
一斉に作動した場合には、供給再開に際して多くの手間
と時間を要することになり、復旧に遅れが生じる。 ｂ．ガスメータの計量範囲（号数）により表１に示すよ
うに漏洩判定量が違うため、作業が複雑になる。However, the above-mentioned leakage confirmation method has the following drawbacks. a. Opening the emergency shutoff valve for 2 minutes to check the generation of the pulse requires a lot of trouble and time when resuming the supply, in the case of a single unit, or when the units are activated simultaneously due to an earthquake or the like. There will be a delay in recovery. b. As shown in Table 1, the leak determination amount differs depending on the measurement range (number) of the gas meter, which complicates the work.
【０００６】[0006]
【表１】 [Table 1]
【０００７】本発明の目的は、上記ａ、ｂに記した欠点
のないフルイディックガスメータにおける復帰時の漏洩
検査方法を提案することである。An object of the present invention is to propose a leak inspection method at the time of restoration in a fluidic gas meter which does not have the drawbacks described in the above a and b.
【０００８】[0008]
【課題を解決するための手段】本発明に係るフルイディ
ックガスメータにおける復帰時の漏洩検査方法の構成は
次のとおりである。ガス入口からフルイディック素子の
ノズルに至るガス流路内に、緊急時にガスの流れを止め
る緊急遮断弁を組み込んで成るフルイディックガスメー
タにおいて、前記緊急遮断弁を復帰させる際に、一旦緊
急遮断弁を開放して内管内のガス圧を回復したのち、緊
急遮断弁を閉じ、一定時間経過後に再び緊急遮断弁を開
放し、このときガスの流量を検出しない時はガス漏れを
無しと判定し、流量を検出した時はガス漏れありと判定
するフルイディックガスメータにおける復帰時の漏洩検
査方法。The constitution of the leakage inspection method at the time of restoration in the fluidic gas meter according to the present invention is as follows. In the gas flow path from the gas inlet to the nozzle of the fluidic element, in a fluidic gas meter that incorporates an emergency shutoff valve that stops the flow of gas in an emergency, when returning the emergency shutoff valve, temporarily turn off the emergency shutoff valve. After opening and recovering the gas pressure in the inner pipe, close the emergency shutoff valve, and open the emergency shutoff valve again after a certain period of time.At this time, if the gas flow rate is not detected, it is judged that there is no gas leak, A leak inspection method at the time of recovery in a fluidic gas meter that determines that there is a gas leak when is detected.
【０００９】[0009]
【作用】緊急遮断弁は、異常流量或いは一定震度以上の
地震等が発生した際に作動してガスを止める。このよう
にして作動した緊急遮断弁を再開放する場合、一旦緊急
遮断弁を開放し、内管内の圧力を所定のガス圧に回復し
たのち、再び緊急遮断弁を閉じる。そして、一定時間経
過後に緊急遮断弁を開放する。この時、ガスの漏洩があ
ると、内管内のガス圧が低下しているので、フルイディ
ック素子のノズル部にガス流が発生し、このガス流によ
り流体振動又はノズル部に取り付けたフローセンサによ
りガス流が検出される。このように、ガス流が検出され
た場合には、ガス漏れありと判定して、直ちに緊急遮断
弁を閉じる。[Function] The emergency shutoff valve operates to stop gas when an abnormal flow rate or an earthquake with a certain seismic intensity or more occurs. When the emergency cutoff valve thus operated is to be opened again, the emergency cutoff valve is once opened, the pressure in the inner pipe is restored to a predetermined gas pressure, and then the emergency cutoff valve is closed again. Then, after a lapse of a certain time, the emergency shutoff valve is opened. At this time, if there is a gas leak, the gas pressure in the inner pipe is lowered, so a gas flow is generated in the nozzle part of the fluidic element, and this gas flow causes fluid vibration or flow sensor attached to the nozzle part. The gas flow is detected. Thus, when the gas flow is detected, it is determined that there is a gas leak, and the emergency shutoff valve is immediately closed.
【００１０】一方、ガス流が検出されない場合には、ガ
ス漏れなしと判定し、緊急遮断弁を開いたままに保持
し、ガスの使用を可能にする。On the other hand, when no gas flow is detected, it is determined that there is no gas leakage, and the emergency shutoff valve is held open to enable the use of gas.
【００１１】[0011]
【実施例】図１に、本発明を実施したフルイディックガ
スメータを示す。１はガスメータ本体、２はフルイディ
ック素子、３はガス入口、４はガス流路、５は緊急遮断
弁、６はノズル、７はリセットボタン、８は流体振動発
生室、９はガス出口にして、この先は内管（屋内配管）
に結ばれている。EXAMPLE FIG. 1 shows a fluidic gas meter embodying the present invention. 1 is a gas meter main body, 2 is a fluidic element, 3 is a gas inlet, 4 is a gas flow path, 5 is an emergency shutoff valve, 6 is a nozzle, 7 is a reset button, 8 is a fluid vibration generating chamber, and 9 is a gas outlet. , This is the inner pipe (indoor pipe)
Tied to.
【００１２】図２は、漏洩検査部の説明図にして、１０
は流量演算回路、１１は漏洩検査回路、１２は遮断弁駆
動回路、１３は内管側ガス圧検出センサである。上記実
施例において、緊急遮断弁５が作動したのち、これを再
開放する場合には、漏洩検査回路１１からの信号により
遮断弁駆動回路１２が緊急遮断弁５を開放する。そし
て、内管内のガス圧をガス圧検出センサ１３により検出
し、所定の圧力を回復したところで緊急遮断弁５を閉じ
る。この後、例えば３０秒の待ち時間をカウンターでカ
ウントし、時間経過後に再び緊急遮断弁５を開放する。
この開放により、フルイディック素子２又はフローセン
サ（図示せず）が、ガス流を検出した場合には、ガス漏
れありと判定して緊急遮断弁５を直ちに閉じる。FIG. 2 is an explanatory view of the leakage inspection section, which shows
Is a flow rate calculation circuit, 11 is a leakage inspection circuit, 12 is a shutoff valve drive circuit, and 13 is an inner pipe side gas pressure detection sensor. In the above-described embodiment, when the emergency shutoff valve 5 is actuated and then reopened, the shutoff valve drive circuit 12 opens the emergency shutoff valve 5 by a signal from the leakage inspection circuit 11. Then, the gas pressure in the inner pipe is detected by the gas pressure detection sensor 13, and when the predetermined pressure is recovered, the emergency cutoff valve 5 is closed. After that, the waiting time of, for example, 30 seconds is counted by the counter, and the emergency shutoff valve 5 is opened again after the lapse of time.
With this opening, when the fluidic element 2 or the flow sensor (not shown) detects a gas flow, it is determined that there is a gas leak, and the emergency shutoff valve 5 is immediately closed.
【００１３】一方、ガス流を検出しない場合には、ガス
漏れなしと判定し、緊急遮断弁５を開いたままに保持
し、ガスの使用を可能にする。On the other hand, when the gas flow is not detected, it is determined that there is no gas leakage, and the emergency shutoff valve 5 is held open to enable the use of gas.
【００１４】[0014]
【発明の効果】本発明は以上のように、緊急遮断弁が作
動してガスを止めたのち、再開放する場合、一旦緊急遮
断弁を開放して内管内のガス圧を回復したのち、再び緊
急遮断弁を閉じて一定時間待ち、この後再び緊急遮断弁
を開放したときにガス流が検出されないときはガス漏れ
なしと判定して緊急遮断弁の開放を保持し、ガス流が検
出されたときはガス漏れありと判定して直ちに緊急遮断
弁を閉じる。この結果、次の効果を奏する。As described above, according to the present invention, when the gas is stopped by operating the emergency cutoff valve and then reopened, the emergency cutoff valve is once opened to restore the gas pressure in the inner pipe, and then the gas is restored again. If the gas flow is not detected when the emergency shutoff valve is opened again after opening the emergency shutoff valve for a certain period of time, it is determined that there is no gas leak, the emergency shutoff valve is held open, and the gas flow is detected. If there is a gas leak, immediately close the emergency shutoff valve. As a result, the following effects are achieved.
【００１５】ａ．緊急遮断弁を一旦開放して内管内のガ
ス圧を回復する時間は数１０秒で良く、又、一旦緊急遮
断弁を閉じて漏洩検査を行っている時間も数１０秒で良
い。この結果、従来の漏洩検査方法に比較して、検査時
間を１／２〜１／３に短縮できる。A. The time required to open the emergency shutoff valve and recover the gas pressure in the inner pipe may be several tens of seconds, and the time required to temporarily close the emergency shutoff valve and perform the leakage inspection may be several tens seconds. As a result, the inspection time can be reduced to 1/2 to 1/3 as compared with the conventional leakage inspection method.
【００１６】ｂ．漏洩検査回路により漏洩検査の自動化
が可能であるため、地震等により一斉に作動した後の漏
洩検査スピードを高めて復旧を早めることができる。B. Since the leakage inspection circuit can automate the leakage inspection, it is possible to speed up the recovery by increasing the leakage inspection speed after being activated all at once due to an earthquake or the like.
【００１７】ｃ．ガス漏れがあった場合、一旦弁を閉じ
て数１０秒間待つようにしたので、ガス漏れがあって弁
下流側の圧力が低下した場合、弁を開けた時に一度にガ
スが流れるので、少量のガス漏れでも検出感度が高い。C. If there is a gas leak, the valve is closed once and the system waits for several tens of seconds. Therefore, if there is a gas leak and the pressure on the downstream side of the valve drops, gas will flow at once when the valve is opened. High detection sensitivity even for gas leaks.
【図１】本発明を実施したフルイディックガスメータの
説明図。FIG. 1 is an explanatory diagram of a fluidic gas meter embodying the present invention.
【図２】漏洩検査方法の説明図。FIG. 2 is an explanatory diagram of a leakage inspection method.
１ フルイディックガスメータ本体 ２ フルイディック素子 ３ ガス入口 ４ ガス流路 ５ 緊急遮断弁 ６ ノズル ７ リセットボタン ８ 振動発生室 ９ ガス出口 １０ 流量演算回路 １１ 漏洩検査回路 １２ 遮断弁駆動回路 １３ ガス圧検出センサ 1 Fluidic gas meter main body 2 Fluidic element 3 Gas inlet 4 Gas flow path 5 Emergency shutoff valve 6 Nozzle 7 Reset button 8 Vibration generating chamber 9 Gas outlet 10 Flow rate calculation circuit 11 Leakage inspection circuit 12 Shutoff valve drive circuit 13 Gas pressure detection sensor
Claims (1)
ルに至るガス流路内に、緊急時にガスの流れを止める緊
急遮断弁を組み込んで成るフルイディックガスメータに
おいて、前記緊急遮断弁を復帰させる際に、一旦緊急遮
断弁を開放して内管内のガス圧を回復したのち、緊急遮
断弁を閉じ、一定時間経過後に再び緊急遮断弁を開放
し、このときガスの流量を検出しない時はガス漏れ無し
と判定し、流量を検出した時はガス漏れありと判定する
フルイディックガスメータにおける復帰時の漏洩検査方
法。1. A fluidic gas meter comprising an emergency shutoff valve for stopping gas flow in an emergency in a gas flow path from a gas inlet to a nozzle of a fluidic element, when the emergency shutoff valve is returned, After opening the emergency shutoff valve once to recover the gas pressure in the inner pipe, close the emergency shutoff valve, and open the emergency shutoff valve again after a certain period of time. Judgment, and when the flow rate is detected, it is judged that there is a gas leak.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29058693A JP2837082B2 (en) | 1993-11-19 | 1993-11-19 | Leakage inspection method at return in fluidic gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29058693A JP2837082B2 (en) | 1993-11-19 | 1993-11-19 | Leakage inspection method at return in fluidic gas meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07139976A true JPH07139976A (en) | 1995-06-02 |
| JP2837082B2 JP2837082B2 (en) | 1998-12-14 |
Family
ID=17757940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29058693A Expired - Fee Related JP2837082B2 (en) | 1993-11-19 | 1993-11-19 | Leakage inspection method at return in fluidic gas meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2837082B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016045131A (en) * | 2014-08-25 | 2016-04-04 | 東京瓦斯株式会社 | Leakage monitoring device, method, and program |
-
1993
- 1993-11-19 JP JP29058693A patent/JP2837082B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016045131A (en) * | 2014-08-25 | 2016-04-04 | 東京瓦斯株式会社 | Leakage monitoring device, method, and program |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2837082B2 (en) | 1998-12-14 |
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|---|---|---|---|
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
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