JPH10115568A - Gas shut-off device - Google Patents
Gas shut-off deviceInfo
- Publication number
- JPH10115568A JPH10115568A JP8269706A JP26970696A JPH10115568A JP H10115568 A JPH10115568 A JP H10115568A JP 8269706 A JP8269706 A JP 8269706A JP 26970696 A JP26970696 A JP 26970696A JP H10115568 A JPH10115568 A JP H10115568A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- unit
- measurement
- gas
- measurement interval
- 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
- Magnetically Actuated Valves (AREA)
- Examining Or Testing Airtightness (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
(57)【要約】
【課題】 圧力測定の測定間隔を変更可能として状況に
応じた圧力低下を検出するガス遮断装置を提供する。
【解決手段】 測定間隔保持部６が保持する測定間隔信
号Ｄにより圧力測定指示部５は圧力測定信号Ａを圧力測
定部２に出力する。圧力測定部２により測定されたガス
通路のガス圧力Ｂは圧力低下判定部３に入力され、ガス
圧力Ｂが判定値以下であるとき、測定間隔変更信号Ｃが
出力され測定間隔保持部６が保持する測定間隔が変更さ
れる。前記ガス圧力が所定値以下である状態が所定回数
以上になったとき、圧力低下判定部３は圧力以上信号Ｅ
を遮断弁駆動部４に出力するので、遮断弁７によりガス
通路は閉栓される。
(57) [Summary] To provide a gas shut-off device for detecting a pressure drop according to a situation by enabling a measurement interval of pressure measurement to be changed. A pressure measurement instruction unit outputs a pressure measurement signal to a pressure measurement unit according to a measurement interval signal held by a measurement interval holding unit. The gas pressure B in the gas passage measured by the pressure measurement unit 2 is input to the pressure drop determination unit 3, and when the gas pressure B is equal to or less than the determination value, a measurement interval change signal C is output and the measurement interval holding unit 6 holds Measurement intervals are changed. When the state in which the gas pressure is equal to or less than the predetermined value is equal to or more than the predetermined number of times, the pressure drop determination unit 3 outputs the signal equal to or higher than the pressure.
Is output to the shut-off valve driving unit 4, so that the gas passage is closed by the shut-off valve 7.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガス使用上の安全
対策としてのガス遮断装置に関し、特にガス圧力の検出
からガス供給圧の低下を検知して遮断弁を動作させるガ
ス遮断装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas shut-off device as a safety measure for gas use, and more particularly to a gas shut-off device for operating a shut-off valve by detecting a decrease in gas supply pressure from gas pressure detection. is there.
【０００２】[0002]
【従来の技術】図９は、従来例に係るガス遮断装置の構
成を示すブロック図である。図９において、圧力測定指
示部２１は所定のタイミングで圧力測定を指示する検査
開始信号ａを圧力測定部２２に出力し、圧力測定部２２
は圧力測定により求めたガス圧力を圧力信号ｂとして圧
力低下判定部２３に出力する。圧力低下判定部２３は予
め記憶している判定値と前記圧力信号ｂと比較して、圧
力信号ｂが判定値以下となる回数が所定回数以上になっ
たとき、圧力異常信号ｃを弁駆動部２４に出力する。弁
駆動部２４は前記圧力異常信号ｃが入力されると、遮断
弁２５を駆動してガス流路を遮断する。これにより、例
えばガス配管工事などによって家庭に供給されているガ
スの圧力が異常に低下したとき、使用中のガス器具の火
が消えて生ガスが流出するような事態が発生することを
防いでいる。2. Description of the Related Art FIG. 9 is a block diagram showing a configuration of a conventional gas shut-off device. In FIG. 9, the pressure measurement instructing unit 21 outputs an inspection start signal a for instructing pressure measurement at a predetermined timing to the pressure measuring unit 22.
Outputs the gas pressure obtained by the pressure measurement to the pressure drop determination unit 23 as a pressure signal b. The pressure drop judging section 23 compares the pre-stored judgment value with the pressure signal b, and when the number of times that the pressure signal b becomes equal to or less than the judgment value becomes equal to or more than a predetermined number, the pressure abnormal signal c is transmitted to the valve driving section. 24. When the pressure abnormality signal c is input, the valve drive unit 24 drives the shutoff valve 25 to shut off the gas flow path. In this way, for example, when the pressure of the gas supplied to the home is abnormally reduced due to gas piping work or the like, it is possible to prevent a situation in which the fire of the gas appliance in use goes out and the raw gas flows out. I have.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来構成においては、圧力低下を検出するための圧力測定
の間隔は、最悪条件を考慮して常時一定の短い間隔で測
定する必要があるため、ガス遮断装置の電源である電池
の消耗が大きく、ガス遮断装置の交換頻度がおおくなる
問題点があった。However, in the above conventional configuration, the interval of pressure measurement for detecting a pressure drop must be measured at a fixed short interval at all times in consideration of the worst condition. There is a problem that the battery which is the power source of the shutoff device is consumed greatly, and the replacement frequency of the gas shutoff device is increased.
【０００４】本発明は、従来構成の問題点を解決すべく
創案されたもので、圧力測定の間隔を変更自在に構成し
圧力変化に伴う異常を正確に検知するガス遮断装置を提
供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the conventional configuration, and has an object to provide a gas shut-off device which is configured to be capable of changing a pressure measurement interval and accurately detects an abnormality caused by a pressure change. Aim.
【０００５】[0005]
【課題を解決するための手段】本願の第１発明に係るガ
ス遮断装置は、圧力測定の測定間隔指令を測定間隔変更
可能に保持する測定間隔保持部と、この測定間隔保持部
から出力される測定間隔信号に基づいて圧力測定の開始
を指示する圧力測定指示部と、この圧力測定指示部から
の指令によりガス通路のガス圧力を測定する圧力測定部
と、この圧力測定部からのガス圧力測定値が予め設定さ
れた判定値以下であるとき前記測定間隔保持部の測定間
隔を変更し、変更した測定間隔による前記ガス圧力が所
定値以下となる回数が所定回数以上であるとき圧力異常
信号を出力する圧力低下判定部と、前記圧力異常信号の
入力により遮断弁を駆動させてガス通路を閉栓する遮断
弁駆動部とを具備してなることを特徴とする。According to a first aspect of the present invention, there is provided a gas shut-off device, comprising: a measurement interval holding unit for holding a measurement interval command for pressure measurement so that the measurement interval can be changed; and a signal output from the measurement interval holding unit. A pressure measurement instructing unit for instructing the start of pressure measurement based on the measurement interval signal, a pressure measuring unit for measuring the gas pressure in the gas passage according to a command from the pressure measurement instructing unit, and a gas pressure measurement from the pressure measuring unit When the value is equal to or less than a predetermined determination value, the measurement interval of the measurement interval holding unit is changed, and when the number of times the gas pressure according to the changed measurement interval becomes equal to or less than a predetermined value is equal to or more than a predetermined number, a pressure abnormality signal is generated. It is characterized by comprising a pressure drop judging section to output, and a shut-off valve driving section that drives a shut-off valve in response to the input of the abnormal pressure signal to close a gas passage.
【０００６】上記構成によれば、常時は所定の長い間隔
で圧力測定と測定値による圧力低下判定とを繰り返し、
圧力低下が検出されたとき、測定間隔を短い間隔に変更
して圧力低下が所定時間継続しているか否かを判定す
る。圧力低下が判定されたときには、遮断弁を駆動して
ガス通路を遮断する。この動作であれば、常時の測定、
判定動作の間隔は長いので、電池電源の消耗は少なく、
ガス遮断装置の交換頻度を抑えることができる。According to the above configuration, the pressure measurement and the determination of the pressure drop based on the measured value are repeated at predetermined long intervals at all times.
When the pressure drop is detected, the measurement interval is changed to a short interval, and it is determined whether the pressure drop has continued for a predetermined time. When the pressure drop is determined, the shutoff valve is driven to shut off the gas passage. With this operation, you can always measure,
Since the interval of the judgment operation is long, the consumption of battery power is small,
The frequency of replacing the gas shut-off device can be reduced.
【０００７】また、本願の第２発明に係るガス遮断装置
は、圧力測定の測定間隔指令を測定間隔変更可能に保持
する測定間隔保持部と、この測定間隔保持部から出力さ
れる測定間隔信号に基づいて圧力測定の開始を指示する
圧力測定指示部と、この圧力測定指示部からの指令によ
りガス通路のガス圧力を測定する圧力測定部と、この圧
力測定部からのガス圧力測定値が予め設定された判定値
以下であるとき前記測定間隔保持部の測定間隔を変更
し、変更した測定間隔による前記ガス圧力が所定値以下
となる回数が所定回数以上であるとき圧力異常信号及び
測定間隔変更信号を出力する圧力低下判定部と、前記圧
力測定部からのガス圧力測定値が予め設定された判定値
以上であるとき前記測定間隔保持部の測定間隔を変更
し、変更した測定間隔による前記ガス圧力が所定値以上
となる回数が所定回数以上であるとき圧力回復信号及び
測定間隔変更信号を出力する圧力回復判定部と、一定量
のガス通過毎に流量信号を出力する流量パルス測定部
と、前記流量信号が単位時間に所定数以上検出されたと
き遮断許可信号を出力する流量パルス判定部と、前記圧
力異常信号と前記遮断許可信号とが入力されたとき遮断
信号を出力する弁駆動判定部と、前記遮断信号の入力に
より遮断弁を動作させてガス通路を閉栓する遮断弁駆動
部とを具備してなることを特徴とする。The gas shut-off device according to the second invention of the present application has a measurement interval holding section for holding a measurement interval command for pressure measurement so that the measurement interval can be changed, and a measurement interval signal output from the measurement interval holding section. A pressure measurement instruction unit for instructing the start of pressure measurement based on the pressure measurement unit, a pressure measurement unit for measuring the gas pressure in the gas passage according to a command from the pressure measurement instruction unit, and a gas pressure measurement value from the pressure measurement unit set in advance. The measurement interval of the measurement interval holding unit is changed when it is equal to or less than the determined determination value, and when the number of times the gas pressure according to the changed measurement interval becomes equal to or less than a predetermined value is equal to or more than a predetermined number, a pressure abnormality signal and a measurement interval change signal. The pressure drop determination unit that outputs the measurement interval, the measurement interval of the measurement interval holding unit is changed when the gas pressure measurement value from the pressure measurement unit is equal to or greater than a predetermined determination value, and the changed measurement interval A pressure recovery determination unit that outputs a pressure recovery signal and a measurement interval change signal when the number of times the gas pressure becomes a predetermined value or more is a predetermined number or more, and a flow pulse measurement that outputs a flow signal every time a certain amount of gas passes. Unit, a flow pulse determination unit that outputs a cutoff permission signal when the flow signal is detected by a predetermined number or more per unit time, and a valve that outputs a cutoff signal when the pressure abnormality signal and the cutoff permission signal are input It is characterized by comprising a drive judging unit and a shut-off valve driving unit that closes a gas passage by operating a shut-off valve in response to the input of the shut-off signal.
【０００８】上記構成によれば、常時は所定の長い測定
間隔での圧力測定と、その測定値による圧力低下判定と
を繰り返し、圧力低下が検出されたとき、測定間隔を短
い間隔に変更して圧力低下が所定時間継続しているか否
かを判定する。また、流量パルス測定による流量判定に
より、ユーザがガス使用中か否かを判定し、ガス使用中
においてガス供給圧の異常低下によるトラブルを回避す
るための遮断弁の閉栓を行うようにする一方、ガス非使
用時には遮断弁を開栓状態に維持して再開栓のための手
間を省略することができるようにし、併せて不必要な遮
断弁の駆動を無くして電池の消耗の防止を図ることがで
きる。しかも、単位時間に所定数以上の流量信号があっ
たときのみ遮断許可信号が出力されるように構成するこ
とで、ガス供給圧の異常低下に伴う流量パルスをガス使
用と誤って判定することがなく、ガス使用か否かの誤判
定を防止する。更に、一旦ガス圧力の低下が検出された
が、遮断弁を閉栓するまでもない場合において圧力回復
判定により、異常低下圧力とガス正常使用時の圧力との
境界にあるガス圧力を精細に測定判定し、圧力が回復状
態にあると判定されたときは、遮断弁を閉栓することな
く元の状態に復帰させることができるようにしている。According to the above configuration, the pressure measurement at a predetermined long measurement interval and the pressure drop determination based on the measured value are repeated at all times, and when the pressure drop is detected, the measurement interval is changed to a short interval. It is determined whether the pressure drop has continued for a predetermined time. In addition, while determining whether or not the user is using the gas by the flow rate determination by the flow rate pulse measurement, while closing the shut-off valve to avoid a trouble due to abnormally low gas supply pressure during the gas use, When the gas is not used, the shut-off valve is kept open so that the trouble of re-opening can be omitted, and unnecessary driving of the shut-off valve can be eliminated to prevent battery consumption. it can. Moreover, by configuring so that the shut-off permission signal is output only when a predetermined number or more of the flow signals are present in the unit time, the flow pulse accompanying the abnormal decrease in the gas supply pressure can be erroneously determined to be gas use. Erroneous determination of whether or not to use gas is prevented. Furthermore, when a decrease in gas pressure is detected once, but it is not necessary to close the shut-off valve, the gas pressure at the boundary between the abnormally reduced pressure and the pressure during normal use of the gas is precisely measured and determined by the pressure recovery determination. However, when it is determined that the pressure is in the recovery state, the pressure can be returned to the original state without closing the shutoff valve.
【０００９】上記構成は、通信手段を通じて外部から伝
送された情報に基づき圧力判定変更値及び流量パルス判
定変更値を出力する外部通信手段と、前記圧力判定変更
値に基づき圧力低下判定部の圧力低下判定値及び圧力回
復判定部の圧力回復判定値を変更する圧力判定値変更部
と、前記流量パルス判定変更値に基づき流量パルス判定
部の流量パルス判定値を変更する流量パルス判定値変更
部とを備えて構成することができる。[0009] The above structure comprises an external communication means for outputting a pressure judgment change value and a flow rate pulse judgment change value based on information transmitted from the outside through the communication means, and a pressure drop judgment unit based on the pressure judgment change value. A pressure determination value change unit that changes the pressure recovery determination value of the determination value and the pressure recovery determination unit, and a flow pulse determination value change unit that changes the flow pulse determination value of the flow pulse determination unit based on the flow pulse determination change value. It can be provided and configured.
【００１０】この構成によれば、通信手段を通じた指示
により、流量パルス判定及び圧力低下判定値、圧力回復
判定値をユーザの使用しているガス器具の組み合わせた
最適値に変更することができ、ガス遮断装置の動作をよ
り正確に制御することができる。[0010] According to this configuration, the flow rate pulse judgment, the pressure drop judgment value, and the pressure recovery judgment value can be changed to the optimum value in combination with the gas appliance used by the user by the instruction through the communication means. The operation of the gas shut-off device can be controlled more accurately.
【００１１】[0011]
【発明の実施の形態】以下、添付図面を参照して本発明
の一実施形態について説明し、本発明の理解に供する。
尚、以下の実施形態は本発明を具体化した一例であっ
て、本発明の技術的範囲を限定するものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The following embodiments are examples embodying the present invention and do not limit the technical scope of the present invention.
【００１２】図１は、本実施形態に係るガス遮断装置１
の構成を示すブロック図である。ガス遮断装置１は、圧
力測定指示部５と、圧力測定部２と、圧力低下判定部３
と、遮断弁駆動部４と、測定間隔保持部６とを備えて構
成されている。FIG. 1 shows a gas shut-off device 1 according to this embodiment.
FIG. 3 is a block diagram showing the configuration of FIG. The gas cutoff device 1 includes a pressure measurement instructing unit 5, a pressure measuring unit 2, and a pressure drop determining unit 3.
, A shut-off valve driving unit 4 and a measurement interval holding unit 6.
【００１３】上記構成において、測定間隔保持部６は時
間間隔のカウンターとして構成されており、保持する時
間間隔でカウントアップされる毎に出力される測定間隔
信号Ｄは圧力測定指示部５に入力される。圧力測定指示
部５は測定間隔信号Ｄが入力される毎に、圧力測定の開
始を指示する圧力検査開始信号Ａを圧力測定部２に出力
する。圧力測定部２は圧力検査開始信号Ｅが入力される
毎にガス圧力を測定して圧力検出信号Ｂを圧力低下判定
部３に出力する。圧力低下判定部３は入力された圧力検
出信号Ｂと予め設定された判定値と比較して、ガス圧力
が判定値以下であるとき測定間隔変更信号Ｃを測定間隔
保持部６に出力する。測定間隔保持部６は測定間隔変更
信号Ｃが入力されると、保持している測定間隔時間を変
更する。In the above configuration, the measurement interval holding unit 6 is configured as a time interval counter, and the measurement interval signal D output every time the count is counted up at the held time interval is input to the pressure measurement instruction unit 5. You. Each time the measurement interval signal D is input, the pressure measurement instructing unit 5 outputs a pressure test start signal A for instructing the start of pressure measurement to the pressure measuring unit 2. Each time the pressure test start signal E is input, the pressure measurement unit 2 measures the gas pressure and outputs a pressure detection signal B to the pressure drop determination unit 3. The pressure drop determination unit 3 compares the input pressure detection signal B with a preset determination value, and outputs a measurement interval change signal C to the measurement interval holding unit 6 when the gas pressure is equal to or less than the determination value. Upon receiving the measurement interval change signal C, the measurement interval holding unit 6 changes the held measurement interval time.
【００１４】圧力低下判定部３は入力される圧力検出信
号Ｂが判定値以下となる状態が所定回数以上になったと
き、圧力異常信号Ｅを遮断弁駆動部４に出力する。圧力
異常信号Ｅが入力されると、遮断弁駆動部４は遮断弁７
を駆動してガス通路を遮断する。The pressure drop judging section 3 outputs an abnormal pressure signal E to the shut-off valve driving section 4 when the state in which the input pressure detection signal B becomes equal to or smaller than the judgment value has exceeded a predetermined number of times. When the pressure abnormality signal E is input, the shut-off valve driving unit 4
To shut off the gas passage.
【００１５】上記構成により供給ガス圧力が異常に低下
したときのガス通路遮断の処理手順を図２に示すフロー
チャートを参照して説明する。この処理動作は、インタ
ーバルカレンダ等により周期的に実行される。尚、同図
に示すＳ１、Ｓ２……は、動作順序を示すステップ番号
で、本文に添記する番号と一致する。With reference to the flow chart shown in FIG. 2, a description will be given of a processing procedure for shutting off the gas passage when the supply gas pressure is abnormally reduced by the above configuration. This processing operation is periodically executed by an interval calendar or the like. .. Shown in the figure are step numbers indicating the order of operation, and coincide with the numbers appended to the text.
【００１６】圧力測定指示部５においてガス通路が閉栓
中か否かを判定して、遮断弁７が閉栓中であれば処理を
終了し、開栓状態にあることを確認して、ガス遮断制御
の動作が開始される（Ｓ１）。The pressure measurement instructing unit 5 determines whether or not the gas passage is closed. If the shutoff valve 7 is closed, the process is terminated, and it is confirmed that the gas passage is open. Is started (S1).
【００１７】測定間隔保持部６の測定間隔カウンターが
カウントオーバしたとき（Ｓ２）、測定間隔信号Ｄが出
力される（例えば、１０秒間隔で出力される）ので、圧
力測定指示部５から圧力検査信号Ａが出力され、圧力測
定部２はガス圧力を測定する（Ｓ３）。この測定値は圧
力信号Ｂとして圧力低下判定部３に入力され、圧力低下
を判定する所定の判定値（例えば、ガス供給圧力の約１
／４の５０mmH2O ）と比較される（Ｓ４）。測定された
ガス圧力が判定値以下であったとき、圧力低下判定部３
は測定間隔変更信号Ｃを測定間隔保持部６に出力して、
測定間隔を短い間隔（例えば、１秒間隔）に変更する
（Ｓ５）。一方、圧力低下が成立しないときは、ステッ
プＳ８に移行して測定間隔時間を長時間（例えば、１０
秒間隔）に戻して処理を終了する。When the measurement interval counter of the measurement interval holding section 6 counts over (S2), the measurement interval signal D is output (for example, output at 10-second intervals). The signal A is output, and the pressure measuring unit 2 measures the gas pressure (S3). This measured value is input to the pressure drop determining unit 3 as a pressure signal B, and a predetermined determination value (for example, about 1
Are compared / 4 of 50 mm H 2 O) and (S4). When the measured gas pressure is equal to or less than the judgment value, the pressure drop judgment unit 3
Outputs a measurement interval change signal C to the measurement interval holding unit 6,
The measurement interval is changed to a short interval (for example, one second interval) (S5). On the other hand, if the pressure drop does not hold, the flow shifts to step S8 to increase the measurement interval time (for example, 10
(Second interval), and the process ends.
【００１８】短い測定間隔でのガス圧力の測定値が判定
値以下の場合、圧力低下が所定時間継続したかを判定す
る（Ｓ６）。ここで圧力低下が所定時間（例えば、５秒
間）継続した場合、圧力低下判定部３は圧力異常信号Ｅ
を遮断弁駆動部４に出力して、遮断弁７によりガス通路
を閉栓して、ガス器具使用における安全を確保する（Ｓ
７）。更に、遮断弁７による閉栓後、測定間隔保持部６
の保持する測定間隔時間を長時間（例えば、１０秒間
隔）に戻して処理を終了する（Ｓ８）。If the measured value of the gas pressure at the short measurement interval is equal to or less than the determination value, it is determined whether the pressure decrease has continued for a predetermined time (S6). Here, when the pressure drop continues for a predetermined time (for example, 5 seconds), the pressure drop determination unit 3 outputs the pressure abnormality signal E
Is output to the shut-off valve drive unit 4 and the gas passage is closed by the shut-off valve 7 to ensure safety in using gas appliances (S
7). Further, after closing by the shut-off valve 7, the measurement interval holding unit 6
Is returned to a long time (for example, every 10 seconds) and the process is terminated (S8).
【００１９】次いで、本発明の第２の実施形態について
説明する。図３は第２の実施形態に係るガス遮断装置の
構成を示すブロック図、図４、５はその動作手順を示す
フローチャートである。尚、先の構成に共通する要素に
は同一の符号を付し、その説明は省略する。Next, a second embodiment of the present invention will be described. FIG. 3 is a block diagram showing the configuration of the gas cutoff device according to the second embodiment, and FIGS. 4 and 5 are flowcharts showing the operation procedure. Note that the same reference numerals are given to components common to the above-described configurations, and description thereof will be omitted.
【００２０】図３において、第２の実施形態に係るガス
遮断装置１ａは、第１の実施形態に係る構成と共通する
圧力測定指示部５と、圧力測定部２と、圧力低下判定部
３と、測定間隔保持部６と、遮断弁駆動部４とに加え
て、圧力回復判定部１１と、流量パルス測定部９と、流
量パルス判定部１０と、弁駆動判定部８とを具備して構
成されている。In FIG. 3, a gas shut-off device 1a according to the second embodiment has a pressure measurement instructing unit 5, a pressure measurement unit 2, a pressure drop determination unit 3, which are common to the configuration according to the first embodiment. A pressure recovery determination unit 11, a flow pulse measurement unit 9, a flow pulse determination unit 10, and a valve drive determination unit 8, in addition to the measurement interval holding unit 6 and the shut-off valve driving unit 4. Have been.
【００２１】前記圧力回復判定部１１は、一旦圧力低下
が検出されたが遮断弁を閉栓するまでもないときに、圧
力低下判定部３から圧力監視信号Ｇを受けて、圧力監視
モードになっている場合に、圧力測定部２から出力され
る圧力信号Ｂから圧力回復判定を行う。即ち、ガス供給
圧力とガス正常使用時の圧力値と前記圧力低下判定値の
中間に位置する所定値と比較し、そのガス圧力が所定値
以上のときは短い間隔で測定を行い、前記所定値以上の
状態が所定時間（例えば、５秒間）あるときガス圧力が
回復したと判定する。ガス圧力が回復したと判定した場
合、圧力監視モードを通常モードに変更すると共に圧力
測定間隔を長い間隔に戻すため、測定間隔変更信号Ｆを
測定間隔保持部６に出力する。The pressure recovery judging section 11 receives the pressure monitoring signal G from the pressure drop judging section 3 and switches to the pressure monitoring mode when the pressure drop is detected but it is not necessary to close the shut-off valve. If so, a pressure recovery determination is made from the pressure signal B output from the pressure measuring unit 2. That is, the gas supply pressure, the pressure value during normal use of the gas, and a predetermined value located in the middle of the pressure drop determination value are compared with each other. When the gas pressure is equal to or more than the predetermined value, measurement is performed at short intervals, and the predetermined value is measured. When the above state exists for a predetermined time (for example, 5 seconds), it is determined that the gas pressure has recovered. When it is determined that the gas pressure has recovered, a measurement interval change signal F is output to the measurement interval holding unit 6 to change the pressure monitoring mode to the normal mode and return the pressure measurement interval to a long interval.
【００２２】前記流量パルス測定部９は、一定量のガス
の通過毎に流量信号Ｉを出力する。The flow pulse measuring section 9 outputs a flow signal I every time a certain amount of gas passes.
【００２３】また、流量パルス判定部１０は、前記流量
信号Ｉが入力されると、所定時間（例えば、１０分間）
内に複数回の流量信号Ｉの入力を判定して、複数回数以
上（例えば、２回以上）あれば遮断許可信号Ｊを弁駆動
判定部８に出力する。When the flow rate signal I is input, the flow rate pulse judging section 10 sets a predetermined time (for example, 10 minutes).
The input of the flow rate signal I is determined a plurality of times, and the cutoff permission signal J is output to the valve drive determination unit 8 if the number of times is equal to or more than two (eg, two or more).
【００２４】前記弁駆動判定部８は、圧力低下判定部３
からの圧力異常信号Ｅと、流量パルス判定部１０からの
遮断許可信号Ｊとが入力されたとき、遮断信号Ｈを遮断
弁駆動部４に出力する。The valve drive judging section 8 includes a pressure drop judging section 3.
When the pressure abnormality signal E from the controller 10 and the shut-off permission signal J from the flow pulse judging unit 10 are input, the shut-off signal H is output to the shut-off valve driving unit 4.
【００２５】上記構成により供給ガス圧力が異常に低下
したときのガス通路遮断の処理手順を図４、５のフロー
チャートを参照して説明する。尚、同図に示すＳ１１、
Ｓ１２……は、動作順序を示すステップ番号で、本文に
添記する番号と一致する。With reference to the flow charts shown in FIGS. 4 and 5, a description will be given of a processing procedure for shutting off the gas passage when the supply gas pressure is abnormally lowered by the above configuration. Note that S11 shown in FIG.
S12... Are the step numbers indicating the operation order, and coincide with the numbers added to the text.
【００２６】図４は、流量測定に基づく遮断許可信号出
力の制御処理を示している。FIG. 4 shows a control process of the output of the cutoff permission signal based on the flow rate measurement.
【００２７】流量パルス測定部９はガス通路のガス流量
を測定して、一定量のガスが通過すれば（例えば、ガス
遮断装置の計量体積で０．６リットル）、流量信号Ｉを
流量パルス判定部１０に入力する（Ｓ１１）。流量パル
ス判定部１０は、単位時間当たりの流量信号Ｉの入力回
数を判定して、複数回の流量パルスの入力があれば、流
量判定成立として（Ｓ１２）、流量パルス判定部１０は
判定用流量あり、即ちユーザがガスを使用していると判
定して遮断許可信号Ｊを出力する（Ｓ１３）。The flow rate pulse measuring section 9 measures the gas flow rate in the gas passage, and if a certain amount of gas passes (for example, 0.6 liter in the measured volume of the gas shutoff device), the flow rate signal I is determined as a flow rate pulse determination. Input to the unit 10 (S11). The flow rate pulse determination unit 10 determines the number of times the flow rate signal I is input per unit time, and if a plurality of flow rate pulses are input, the flow rate determination is established (S12), and the flow rate pulse determination unit 10 determines the flow rate for determination. Yes, that is, it is determined that the user is using the gas, and the cutoff permission signal J is output (S13).
【００２８】この遮断許可信号Ｊは弁駆動判定部８にお
いて保持される。この処理手順によりユーザがガス非使
用時においても供給ガス圧力低下時に多少ガスが流れる
ため、１流量パルスがカウントされ、ユーザのガス使用
と誤判定される可能性があるが、それを防いでいる。例
えば、１０分間に２流量パルス異常とすることにより、
上記誤判定を排除でき、ユーザがガスを使用しているか
否かを正確に判定することができる。The shut-off permission signal J is held in the valve drive judging section 8. According to this processing procedure, even when the user does not use the gas, a small amount of gas flows when the supply gas pressure drops, so that one flow rate pulse is counted, which may be erroneously determined to be gas use by the user, but this is prevented. . For example, by making two flow pulse abnormalities in 10 minutes,
It is possible to eliminate the erroneous determination and accurately determine whether the user is using gas.
【００２９】次に、図５を参照して、ガス通路遮断動作
の処理手順について説明する。Next, referring to FIG. 5, the processing procedure of the gas passage shutoff operation will be described.
【００３０】圧力測定指示部５においてガス通路が閉栓
中か否かを判定して（Ｓ２１）、閉栓状態にあれば、測
定間隔保持部６の測定間隔カウンタがカウントオーバし
たとき、例えば、１０秒経過したとき（Ｓ２２）、測定
間隔信号Ｄが出力されるので、圧力測定支持部５から圧
力検査信号Ａが出力され、圧力測定部２はガス圧力を測
定する（Ｓ２３）。この測定値は圧力信号Ｂとして圧力
回復判定部１１と圧力低下判定部３とに入力される。The pressure measurement instructing section 5 determines whether or not the gas passage is closed (S21). If the gas passage is closed, the measurement interval counter of the measurement interval holding section 6 counts over, for example, 10 seconds. When the time has elapsed (S22), since the measurement interval signal D is output, the pressure test signal A is output from the pressure measurement support unit 5, and the pressure measurement unit 2 measures the gas pressure (S23). This measured value is input to the pressure recovery determination unit 11 and the pressure drop determination unit 3 as a pressure signal B.
【００３１】圧力回復判定部１１において、まず圧力監
視モードとなっているか否かが判定され（Ｓ２４）、そ
うでない場合はステップＳ２８に移行する。圧力監視モ
ードの場合には、圧力信号Ｂからの圧力値が正常ガス使
用時の圧力値と前記圧力低下判定値の中間に位置する所
定値（例えば、ガス供給圧力の約１／２の１００ｍｍＨ
2 Ｏ）以上であるか否かを判定し（Ｓ２５）、所定値未
満であれば後のステップＳ２８に進め、所定値以上であ
るときは測定間隔変更信号Ｆを測定間隔保持部６に出力
する。測定間隔保持部６は圧力測定間隔を短間隔（例え
ば、１秒間隔）に変更し（Ｓ２６）、測定間隔を短間隔
にしたときの圧力が所定値（例えば、５秒間）継続して
圧力回復が成立すれば、圧力回復成立とする（Ｓ２
７）。圧力回復成立の場合には、圧力監視モードから通
常モードに変更し（Ｓ３５）、元の状態に復帰させる。
圧力回復が成立しない場合はステップＳ２８に移行す
る。The pressure recovery determination section 11 first determines whether or not the mode is the pressure monitoring mode (S24). If not, the process proceeds to step S28. In the case of the pressure monitoring mode, the pressure value from the pressure signal B is a predetermined value (for example, 100 mmH of about 1/2 of the gas supply pressure) which is located between the pressure value when the normal gas is used and the pressure drop determination value.
It is determined whether or not it is not less than 2 O) (S25). If it is less than the predetermined value, the process proceeds to step S28. If it is not less than the predetermined value, a measurement interval change signal F is output to the measurement interval holding unit 6. . The measurement interval holding unit 6 changes the pressure measurement interval to a short interval (for example, 1 second interval) (S26), and the pressure when the measurement interval is set to the short interval continues for a predetermined value (for example, 5 seconds) to recover the pressure. Is established, pressure recovery is established (S2
7). If the pressure recovery is established, the mode is changed from the pressure monitoring mode to the normal mode (S35), and the original state is restored.
If the pressure recovery has not been established, the process proceeds to step S28.
【００３２】圧力信号Ｂは圧力低下判定部３にも入力さ
れ、判定値と比較される（Ｓ２８）。ガス圧力が判定値
以下であったとき、圧力監視モードとすると共に（Ｓ２
９）、圧力低下判定部３は測定間隔変更信号Ｃを測定間
隔保持部６に出力して、測定間隔を短い間隔（例えば、
１秒間隔）に変更する（Ｓ３０）。測定間隔を短間隔に
したときのガス圧力が所定値以下、即ち圧力低下が所定
時間（例えば、５秒間）継続し、圧力低下が成立したと
き（Ｓ３１）、弁駆動判定部８は流量パルス判定部１０
からの遮断許可信号Ｊの有無を判定し（Ｓ３２）、圧力
低下判定部３からの圧力異常信号Ｅと遮断許可信号Ｊと
があるとき、遮断弁駆動部４により遮断弁７を駆動して
ガス通路を閉栓する（Ｓ３３）。The pressure signal B is also input to the pressure drop judging section 3 and is compared with a judgment value (S28). When the gas pressure is equal to or less than the determination value, the mode is set to the pressure monitoring mode (S2).
9), the pressure drop determination unit 3 outputs the measurement interval change signal C to the measurement interval holding unit 6, and reduces the measurement interval to a short interval (for example,
(1 second interval) (S30). When the gas pressure when the measurement interval is set to a short interval is equal to or less than a predetermined value, that is, when the pressure drop continues for a predetermined time (for example, 5 seconds) and the pressure drop is established (S31), the valve drive determination unit 8 determines the flow rate pulse. Part 10
Is determined (S32), and when there is a pressure abnormality signal E and a shut-off permission signal J from the pressure drop determination unit 3, the shut-off valve 7 is driven by the shut-off valve The passage is closed (S33).
【００３３】遮断弁７による閉栓後、及びステップＳ２
７で圧力回復が成立したとき、ステップＳ３２で判定用
流量がなかったとき、ステップＳ２８における判定で圧
力低下でなくなったときは、測定間隔保持部６の保持す
る測定間隔時間を長時間（例えば、１０秒）に戻して処
理を終了する（Ｓ３４）。After closing by the shut-off valve 7, and in step S2
7, when the pressure recovery is established, when there is no flow rate for determination in step S32, and when the pressure drop is not stopped in the determination in step S28, the measurement interval time held by the measurement interval holding unit 6 is set to a long time (for example, (10 seconds), and the process ends (S34).
【００３４】次に、本発明の第３の実施形態について説
明する。図６は第３の実施形態に係るガス遮断装置１ｂ
の構成を示すブロック図、図７、８はガス遮断動作の処
理手順を示すフローチャートである。尚、先の構成に共
通する要素には同一の符号を付し、その説明は省略す
る。Next, a third embodiment of the present invention will be described. FIG. 6 shows a gas shut-off device 1b according to the third embodiment.
7 and 8 are flowcharts showing the processing procedure of the gas shutoff operation. Note that the same reference numerals are given to components common to the above-described configurations, and description thereof will be omitted.
【００３５】図６において、第３の実施形態に係るガス
遮断装置１ｂは、先の第２の実施形態に係るガス遮断装
置１ａの構成に、外部通信手段１２と、圧力判定変更部
１３と、流量パルス判定値変更部１４とを加えて構成さ
れている。In FIG. 6, a gas shut-off device 1b according to the third embodiment has the same structure as the gas shut-off device 1a according to the second embodiment, except that an external communication means 12, a pressure determination change unit 13, The flow rate pulse determination value changing unit 14 is added.
【００３６】前記外部通信手段１２は、電話回線等の通
信手段を通じて伝送されてきた情報をもとに圧力判定値
信号Ｋ及び流量パルス判定値信号Ｐを出力する。前記圧
力判定値変更部１３は、前記圧力判定値信号Ｋに基づ
き、圧力低下判定部３が圧力低下を判定する判定値を変
更する判定値変更信号Ｌと、圧力回復判定部１１の圧力
回復判定値を変更する圧力回復判定値変更信号Ｍとを出
力し、前記圧力判定値と圧力回復判定値とをユーザが使
用しているガス器具の組み合わせに適合させる最適値に
変更する。The external communication means 12 outputs a pressure judgment value signal K and a flow rate pulse judgment value signal P based on information transmitted through communication means such as a telephone line. The pressure determination value change unit 13 is configured to determine whether the pressure drop determination unit 3 determines a pressure drop based on the pressure determination value signal K. A pressure recovery determination value change signal M for changing a value is output, and the pressure determination value and the pressure recovery determination value are changed to an optimum value adapted to a combination of gas appliances used by a user.
【００３７】また、前記流量パルス判定値変更部１４
は、前記流量パルス変更信号Ｐに基づき流量パルス判定
部１０が判定する判定値を変更する流量パルス判定値変
更信号Ｎを出力し、ユーザが使用しているガス器具に適
合させる最適値に変更する。The flow pulse determination value changing unit 14
Outputs a flow pulse determination value change signal N for changing the determination value determined by the flow pulse determination unit 10 based on the flow pulse change signal P, and changes the value to an optimum value adapted to the gas appliance used by the user. .
【００３８】上記構成によりガス圧力が低下したときの
ガス通路遮断の処理手順は図７及び図６に示すフローチ
ャートの通りで、図７に示すＳ４１〜Ｓ４７以外の供給
ガス圧力が異常に低下したときのガス通路遮断動作の処
理手順は、第２の実施形態に示した図４、５のフローと
同様なので説明は省略する。The processing procedure for shutting off the gas passage when the gas pressure is reduced by the above configuration is as shown in the flow charts of FIGS. 7 and 6. When the supply gas pressure other than S41 to S47 shown in FIG. The processing procedure of the gas passage shut-off operation is the same as that in the flow of FIGS.
【００３９】図７において、外部通信手段１２から出力
される流量パルス判定値信号Ｐが流量パルス判定値変更
部１４に入力されたとき（Ｓ４１）、流量パルス判定値
変更部１４は流量パルス判定値変更信号Ｎを流量パルス
判定部１０に出力するので、流量パルス判定値が変更さ
れる（Ｓ４２）。In FIG. 7, when the flow rate pulse judgment value signal P output from the external communication means 12 is input to the flow rate pulse judgment value changing section 14 (S41), the flow rate pulse judgment value changing section 14 outputs the flow rate pulse judgment value. Since the change signal N is output to the flow pulse judging unit 10, the flow pulse judgment value is changed (S42).
【００４０】次に、外部通信手段１２から圧力判定値信
号Ｋが入力されてきていれば、（Ｓ４３）、圧力判定値
変更部１３は、圧力低下判定部３の圧力判定値を、例え
ばガス供給圧力の約１／６の３０ｍｍＨ2 Ｏに変更して
圧力低下判定値変更信号Ｌを圧力低下判定部３に入力
し、圧力回復判定部１１の圧力回復判定値を例えばガス
供給圧力の約１／３の６０ｍｍＨ2 Ｏに変更して圧力回
復判定値変更信号Ｍを圧力回復判定部１１に入力する
（Ｓ４４）。この処理動作により、ガスセントラルヒー
ティング等の大型ガス器具の運転時の大幅なガス圧力低
下（機種により約８０ｍｍＨ2 Ｏが低下する）の影響を
回避することができる。Next, if the pressure judgment value signal K has been input from the external communication means 12 (S43), the pressure judgment value changing section 13 changes the pressure judgment value of the pressure drop judgment section 3 to, for example, gas supply. The pressure is changed to 30 mmH 2 O of about 1/6 of the pressure and the pressure drop judgment value change signal L is input to the pressure drop judgment section 3, and the pressure recovery judgment value of the pressure recovery judgment section 11 is set to, for example, about 1 / The pressure recovery determination value change signal M is changed to 60 mmH 2 O of No. 3 and input to the pressure recovery determination unit 11 (S44). By this processing operation, it is possible to avoid the influence of a large gas pressure drop (about 80 mmH 2 O is reduced depending on the model) during the operation of a large gas appliance such as gas central heating.
【００４１】以下の供給ガス圧力が異常に低下したとき
のガス通路遮断動作の処理手順は、図６に示すフローの
ステップＳ２４における圧力回復検出の所定値を前記圧
力回復判定値変更信号Ｍに基づいて変更し、ステップＳ
２７における圧力低下検出の所定値を前記圧力低下判定
値変更信号Ｌに基づいて変更して、第２の実施形態にお
いて説明した処理手順と同様になされる。The following processing procedure of the gas passage shut-off operation when the supply gas pressure is abnormally lowered is based on the predetermined value of the pressure recovery detection in step S24 of the flow shown in FIG. And change, step S
The predetermined value of the pressure drop detection at 27 is changed based on the pressure drop determination value change signal L, and the process is performed in the same manner as the processing procedure described in the second embodiment.
【００４２】[0042]
【発明の効果】以上の説明の通り本願の第１発明によれ
ば、常時は所定の長い間隔で圧力測定と測定値による圧
力低下判定とを繰り返し、圧力低下が検出されたとき、
測定間隔を短い間隔に変更して圧力低下が所定時間継続
しているか否かを判定し、圧力低下が判定されたときに
は、遮断弁を駆動してガス通路を遮断する。この動作で
あれば、常時の測定、判定動作の間隔は長いので、電池
電源の消耗は少なく、ガス遮断装置の交換頻度を抑える
ことができる。As described above, according to the first aspect of the present invention, the pressure measurement and the pressure drop determination based on the measured value are repeated at a predetermined long interval at all times, and when the pressure drop is detected,
The measurement interval is changed to a short interval to determine whether or not the pressure drop has continued for a predetermined time. When the pressure drop is determined, the shutoff valve is driven to shut off the gas passage. With this operation, since the interval between the regular measurement and judgment operations is long, the consumption of the battery power is small, and the frequency of replacement of the gas shut-off device can be suppressed.
【００４３】また、本願の第２発明によれば、常時は所
定の長い間隔で圧力測定と測定値による圧力低下判定と
を繰り返し、圧力低下が検出されたとき、測定間隔を短
い間隔に変更して圧力低下が所定時間継続しているか否
かを判定する。また、流量パルス測定による流量判定に
より、ユーザがガス使用中か否かを判定し、ガス使用中
においてガス供給圧の異常低下によるトラブルを回避す
るための遮断弁の閉栓を行うようにする一方、ガス非使
用時には遮断弁を開栓状態に維持して再開栓のための手
間を省略することができるようにし、併せて不必要な遮
断弁の駆動を無くして電池の消耗の防止を図ることがで
きる。しかも、単位時間に所定数以上の流量信号があっ
たときのみ遮断許可信号が出力されるように構成するこ
とで、ガス供給圧の異常低下に伴う流量パルスをガス使
用と誤って判定することがなく、ガス使用か否かの誤判
定を防止する。更に、一旦ガス圧力の低下が検出された
が、遮断弁を閉栓するまでもない場合において圧力回復
判定により、異常低下圧力とガス正常使用時の圧力との
境界にあるガス圧力を精細に測定判定し、圧力が回復状
態にあると判定されたときは、遮断弁を閉栓することな
く元の状態に復帰させることができるようにしている。According to the second aspect of the present invention, the pressure measurement and the determination of the pressure drop based on the measured value are always repeated at a predetermined long interval, and when the pressure drop is detected, the measurement interval is changed to a short interval. It is determined whether the pressure drop has continued for a predetermined time. In addition, while determining whether or not the user is using the gas by the flow rate determination by the flow rate pulse measurement, while closing the shut-off valve to avoid a trouble due to abnormally low gas supply pressure during the gas use, When the gas is not used, the shut-off valve is kept open so that the trouble of re-opening can be omitted, and unnecessary driving of the shut-off valve can be eliminated to prevent battery consumption. it can. Moreover, by configuring so that the shut-off permission signal is output only when a predetermined number or more of the flow signals are present in the unit time, the flow pulse accompanying the abnormal decrease in the gas supply pressure can be erroneously determined to be gas use. Erroneous determination of whether or not to use gas is prevented. Furthermore, when a decrease in gas pressure is detected once, but it is not necessary to close the shut-off valve, the gas pressure at the boundary between the abnormally reduced pressure and the pressure during normal use of the gas is precisely measured and determined by the pressure recovery determination. However, when it is determined that the pressure is in the recovery state, the pressure can be returned to the original state without closing the shutoff valve.
【００４４】上記構成は、通信手段を通じて外部から伝
送された情報に基づき圧力低下判定値及び圧力回復判定
値を変更することができるので、圧力低下判定値及び圧
力回復判定値をユーザの使用しているガス器具の組み合
わせた最適値に変更することができ、ガス遮断装置の動
作をより正確に制御することができる。In the above configuration, the pressure drop judgment value and the pressure recovery judgment value can be changed based on information transmitted from the outside through the communication means. Therefore, the user can use the pressure drop judgment value and the pressure recovery judgment value. It can be changed to the optimal value of the combination of the gas appliances in use, and the operation of the gas shut-off device can be controlled more accurately.
【図１】本発明の第１の実施形態に係るガス遮断装置の
構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of a gas shutoff device according to a first embodiment of the present invention.
【図２】上記構成による処理動作の手順を示すフローチ
ャートである。FIG. 2 is a flowchart showing a procedure of a processing operation by the above configuration.
【図３】本発明の第２の実施形態に係るガス遮断装置の
構成を示すブロック図である。FIG. 3 is a block diagram showing a configuration of a gas cutoff device according to a second embodiment of the present invention.
【図４】上記構成による処理動作の流量パルス判定の処
理手順を示すフローチャートである。FIG. 4 is a flowchart showing a processing procedure for determining a flow rate pulse in a processing operation according to the above configuration.
【図５】上記構成による処理動作の圧力低下及び圧力回
復の処理手順を示すフローチャートである。FIG. 5 is a flowchart showing a processing procedure of pressure reduction and pressure recovery of the processing operation according to the above configuration.
【図６】本発明の第３の実施形態に係るガス遮断装置の
構成を示すブロック図である。FIG. 6 is a block diagram showing a configuration of a gas shutoff device according to a third embodiment of the present invention.
【図７】上記構成による動作処理の流量パルス判定値変
更、流量判定及び圧力判定値変更の処理手順を示すフロ
ーチャートである。FIG. 7 is a flowchart showing a processing procedure for changing a flow rate pulse determination value, a flow rate determination, and a pressure determination value in the operation processing according to the above configuration.
【図８】従来技術に係るガス遮断装置の構成を示すブロ
ック図である。FIG. 8 is a block diagram showing a configuration of a gas shut-off device according to a conventional technique.
１、１ａ、１ｂ ガス遮断装置 ２ 圧力測定部 ３ 圧力低下判定部 ４ 遮断弁駆動部 ５ 圧力測定指示部 ６ 測定間隔保持部 ７ 遮断弁 ８ 弁駆動判定部 ９ 流量パルス測定部 １０ 流量パルス判定部 １１ 圧力回復判定部 １２ 外部通信手段 １３ 圧力判定値変更部 1, 1a, 1b Gas shut-off device 2 Pressure measuring unit 3 Pressure drop judging unit 4 Shut-off valve driving unit 5 Pressure measurement instructing unit 6 Measurement interval holding unit 7 Shut-off valve 8 Valve driving judging unit 9 Flow rate pulse measuring unit 10 Flow rate pulse judging unit 11 Pressure recovery determination unit 12 External communication means 13 Pressure determination value change unit
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉田 美保 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 白沢 忠徳 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (72)発明者 温井 一光 神奈川県藤沢市みその台９−10 (72)発明者 金子 功 東京都目黒区中目黒４−13−21 Ｂ−807 (72)発明者 藤澤 和也 東京都目黒区中目黒４−13−21 Ａ−408 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Miho Yoshida 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Kazumitsu Atsui 9-10 Misonodai, Fujisawa-shi, Kanagawa (72) Inventor Isao Kaneko 4-13-21 B-807, Nakameguro, Meguro-ku, Tokyo (72) Inventor Kazuya Fujisawa, Meguro-ku, Tokyo Nakameguro 4-13-21 A-408
Claims (3)
可能に保持する測定間隔保持部と、この測定間隔保持部
から出力される測定間隔信号に基づいて圧力測定の開始
を指示する圧力測定指示部と、この圧力測定指示部から
の指令によりガス通路のガス圧力を測定する圧力測定部
と、この圧力測定部からのガス圧力測定値が予め設定さ
れた判定値以下であるとき前記測定間隔保持部の測定間
隔を変更し、変更した測定間隔による前記ガス圧力が所
定値以下となる回数が所定回数以上であるとき圧力異常
信号を出力する圧力低下判定部と、前記圧力異常信号の
入力により遮断弁を駆動させてガス通路を閉栓する遮断
弁駆動部とを具備してなることを特徴とするガス遮断装
置。1. A measurement interval holding unit for holding a measurement interval command for pressure measurement so that the measurement interval can be changed, and a pressure measurement instruction for instructing start of pressure measurement based on a measurement interval signal output from the measurement interval holding unit. Unit, a pressure measuring unit that measures the gas pressure in the gas passage according to a command from the pressure measurement instructing unit, and maintaining the measurement interval when the gas pressure measured value from the pressure measuring unit is equal to or less than a predetermined determination value. The pressure drop determination unit that changes the measurement interval of the unit and outputs a pressure abnormality signal when the number of times that the gas pressure becomes equal to or less than the predetermined value according to the changed measurement interval is equal to or more than the predetermined number, and shuts off by input of the pressure abnormality signal A gas shut-off device comprising: a shut-off valve driving section that drives a valve to close a gas passage.
可能に保持する測定間隔保持部と、この測定間隔保持部
から出力される測定間隔信号に基づいて圧力測定の開始
を指示する圧力測定指示部と、この圧力測定指示部から
の指令によりガス通路のガス圧力を測定する圧力測定部
と、この圧力測定部からのガス圧力測定値が予め設定さ
れた判定値以下であるとき前記測定間隔保持部の測定間
隔を変更し、変更した測定間隔による前記ガス圧力が所
定値以下となる回数が所定回数以上であるとき圧力異常
信号及び測定間隔変更信号を出力する圧力低下判定部
と、前記圧力測定部からのガス圧力測定値が予め設定さ
れた判定値以上であるとき前記測定間隔保持部の測定間
隔を変更し、変更した測定間隔による前記ガス圧力が所
定値以上となる回数が所定回数以上であるとき圧力回復
信号及び測定間隔変更信号を出力する圧力回復判定部
と、一定量のガス通過毎に流量信号を出力する流量パル
ス測定部と、前記流量信号が単位時間に所定数以上検出
されたとき遮断許可信号を出力する流量パルス判定部
と、前記圧力異常信号と前記遮断許可信号とが入力され
たとき遮断信号を出力する弁駆動判定部と、前記遮断信
号の入力により遮断弁を動作させてガス通路を閉栓する
遮断弁駆動部とを具備してなることを特徴とするガス遮
断装置。2. A measurement interval holding unit for holding a measurement interval command for pressure measurement so that the measurement interval can be changed, and a pressure measurement instruction for instructing start of pressure measurement based on a measurement interval signal output from the measurement interval holding unit. Unit, a pressure measuring unit that measures the gas pressure in the gas passage according to a command from the pressure measurement instructing unit, and maintaining the measurement interval when the gas pressure measured value from the pressure measuring unit is equal to or less than a predetermined determination value. A pressure drop determination unit that outputs a pressure abnormal signal and a measurement interval change signal when the number of times the gas pressure according to the changed measurement interval is equal to or less than a predetermined value is equal to or greater than a predetermined number, and the pressure measurement Change the measurement interval of the measurement interval holding unit when the gas pressure measurement value from the unit is equal to or greater than a predetermined determination value, the number of times the gas pressure according to the changed measurement interval becomes a predetermined value or more A pressure recovery determination unit that outputs a pressure recovery signal and a measurement interval change signal when the number of times is equal to or more than a predetermined number of times; a flow rate pulse measurement unit that outputs a flow rate signal every time a certain amount of gas passes; A flow pulse judging unit that outputs a shut-off permission signal when detected as described above, a valve drive judging unit that outputs a shut-off signal when the pressure abnormality signal and the shut-off permit signal are input, and shuts off by inputting the shut-off signal And a shutoff valve driving section for closing a gas passage by operating a valve.
報に基づき圧力判定値及び流量パルス判定値を出力する
外部通信手段と、前記圧力判定値に基づき圧力低下判定
部の圧力低下判定値及び圧力回復判定部の圧力回復判定
値を変更する圧力判定値変更部と、前記流量パルス判定
値に基づき流量パルス判定部の流量パルス判定値を変更
する流量パルス判定値変更部とを備えた請求項２記載の
ガス遮断装置。3. An external communication means for outputting a pressure judgment value and a flow rate pulse judgment value based on information transmitted from outside through the communication means, and a pressure drop judgment value and a pressure recovery of a pressure drop judgment unit based on the pressure judgment value. 3. A pressure judgment value changing unit for changing a pressure recovery judgment value of the judgment unit, and a flow pulse judgment value changing unit for changing a flow pulse judgment value of the flow pulse judgment unit based on the flow pulse judgment value. Gas shut-off device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26970696A JP3737861B2 (en) | 1996-10-11 | 1996-10-11 | Gas shut-off device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26970696A JP3737861B2 (en) | 1996-10-11 | 1996-10-11 | Gas shut-off device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10115568A true JPH10115568A (en) | 1998-05-06 |
| JP3737861B2 JP3737861B2 (en) | 2006-01-25 |
Family
ID=17476057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26970696A Expired - Lifetime JP3737861B2 (en) | 1996-10-11 | 1996-10-11 | Gas shut-off device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3737861B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008117425A (en) * | 2008-01-30 | 2008-05-22 | Matsushita Electric Ind Co Ltd | Gas circuit breaker |
| JP2010502948A (en) * | 2006-08-31 | 2010-01-28 | キャタピラー インコーポレイテッド | Method for calibrating an independent metering valve |
| JP2019200069A (en) * | 2018-05-14 | 2019-11-21 | Ｋｙｂ株式会社 | Fluid leakage detection system |
| JP2020045932A (en) * | 2018-09-18 | 2020-03-26 | パナソニックＩｐマネジメント株式会社 | Gas shut-off device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61172025A (en) * | 1984-12-13 | 1986-08-02 | Caterpillar Mitsubishi Ltd | Gas leakage detection and recording apparatus |
| JPS62211536A (en) * | 1986-03-13 | 1987-09-17 | Nippon Kokan Kk <Nkk> | Gas line gas leak detection method |
| JPH0727658A (en) * | 1993-07-13 | 1995-01-31 | Tokyo Gas Co Ltd | Gas leak detection method |
| JPH0843154A (en) * | 1994-07-29 | 1996-02-16 | Tokyo Gas Co Ltd | Gas leak determination method from inner pipe using fluidic gas meter with flow sensor |
| JPH08128913A (en) * | 1994-11-01 | 1996-05-21 | Tokyo Gas Co Ltd | Leak detection system |
-
1996
- 1996-10-11 JP JP26970696A patent/JP3737861B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61172025A (en) * | 1984-12-13 | 1986-08-02 | Caterpillar Mitsubishi Ltd | Gas leakage detection and recording apparatus |
| JPS62211536A (en) * | 1986-03-13 | 1987-09-17 | Nippon Kokan Kk <Nkk> | Gas line gas leak detection method |
| JPH0727658A (en) * | 1993-07-13 | 1995-01-31 | Tokyo Gas Co Ltd | Gas leak detection method |
| JPH0843154A (en) * | 1994-07-29 | 1996-02-16 | Tokyo Gas Co Ltd | Gas leak determination method from inner pipe using fluidic gas meter with flow sensor |
| JPH08128913A (en) * | 1994-11-01 | 1996-05-21 | Tokyo Gas Co Ltd | Leak detection system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010502948A (en) * | 2006-08-31 | 2010-01-28 | キャタピラー インコーポレイテッド | Method for calibrating an independent metering valve |
| JP2008117425A (en) * | 2008-01-30 | 2008-05-22 | Matsushita Electric Ind Co Ltd | Gas circuit breaker |
| JP2019200069A (en) * | 2018-05-14 | 2019-11-21 | Ｋｙｂ株式会社 | Fluid leakage detection system |
| JP2020045932A (en) * | 2018-09-18 | 2020-03-26 | パナソニックＩｐマネジメント株式会社 | Gas shut-off device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3737861B2 (en) | 2006-01-25 |
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