JPH0530238Y2 - - Google Patents
Info
- Publication number
- JPH0530238Y2 JPH0530238Y2 JP1984179893U JP17989384U JPH0530238Y2 JP H0530238 Y2 JPH0530238 Y2 JP H0530238Y2 JP 1984179893 U JP1984179893 U JP 1984179893U JP 17989384 U JP17989384 U JP 17989384U JP H0530238 Y2 JPH0530238 Y2 JP H0530238Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- gas
- cutoff valve
- signal
- buzzer
- 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.)
- Expired - Lifetime
Links
- 230000005236 sound signal Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
Landscapes
- Emergency Alarm Devices (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はガス漏れ検出器の信号を受けてガス遮
断弁を閉塞するガス遮断駆動装置に関する
この種のガス遮断弁駆動装置は、ガス漏れが発
生し、空気中のガス成分が危険状態に達するとガ
ス遮断弁を自動的に閉塞し、かつこの状態を警報
するために音響器を鳴動させ、動作表示灯で表示
するものである。この装置には一般に非常事態に
備えて緊急操作回路が設けられており、そしてこ
の緊急操作回路は緊急事態のみならず、定期点検
時にガス遮断弁が異常なく動作するか否かテスト
するために用いられている。[Detailed description of the invention] [Field of industrial application] The present invention relates to a gas cutoff drive device that closes a gas cutoff valve in response to a signal from a gas leak detector.This type of gas cutoff valve drive device is designed to prevent gas leakage. When gas occurs and the gas components in the air reach a dangerous state, the gas cutoff valve is automatically closed, and a sounder is sounded to warn of this state, and an operation indicator light is used to indicate the situation. This device is generally equipped with an emergency operation circuit in preparation for emergencies, and this emergency operation circuit is used not only in emergencies but also during periodic inspections to test whether the gas cutoff valve is operating normally. It is being
第３図は従来のガス遮断弁駆動装置のブロツク
図を示す。第３図において、ガス遮断弁駆動装置
は、ガスレベル判定回路１、このガスレベル判定
回路１の出力端に接続された遅延回路２と弁駆動
回路３とからなりガス遮断弁４を閉塞するガス遮
断弁閉塞手段、前記ガス遮断弁４が閉塞するとこ
のガス遮断弁４が内蔵するｂ接点４ｂが開いて動
作表示灯が点灯する動作表示灯回路５とｂ接点４
ｂが開くとブザー電源が投入、すなわちブザー駆
動用の発振器の出力がブザーに供給されてブザー
が鳴動するとともにこの鳴動を停止させる鳴動停
止スイツチ７を有するブザー回路６からなる警報
手段、緊急時に押ボタン形の緊急スイツチ８を閉
じて弁駆動回路３にパルスを発生させ、ガス遮断
弁４を閉塞する緊急操作回路９を備えている。１
０はガス漏れが発生するとガス遮断弁４の動作に
かかわらず表示する表示回路である。
FIG. 3 shows a block diagram of a conventional gas cutoff valve driving device. In FIG. 3, the gas cutoff valve driving device includes a gas level determination circuit 1, a delay circuit 2 connected to the output end of the gas level determination circuit 1, and a valve drive circuit 3. Shutoff valve closing means, an operation indicator circuit 5 and a b contact 4 in which when the gas cutoff valve 4 is closed, a b contact 4b built in the gas cutoff valve 4 opens and an operation indicator light is lit.
When b is opened, the buzzer power is turned on, that is, the output of the oscillator for driving the buzzer is supplied to the buzzer, and the buzzer starts ringing.Alarm means consists of a buzzer circuit 6 having a ringing stop switch 7 that stops the ringing, which can be pressed in case of an emergency. An emergency operation circuit 9 is provided which closes a button-shaped emergency switch 8 to generate a pulse in the valve drive circuit 3 to close the gas cutoff valve 4. 1
0 is a display circuit that displays when a gas leak occurs regardless of the operation of the gas cutoff valve 4.
ガスレベル判定回路１は、図示しないガス漏れ
検出器から送られるガス漏れ信号S1を基準電圧と
比較して空気中のガスレベルが危険値に達してい
ることを判定すると閉塞信号S2を次の遅延回路２
に送り、この遅延回路２でガスレベル判定回路１
の判定が正しいか否かを閉塞信号S2が連続してい
るか否かで確認する。弁駆動回路３は閉塞信号S2
が遅延回路２の遅延時間以上継続している時遅延
回路２から出力される信号を受けてパルスを発生
し、このパルスをガス遮断弁４のコイル４ａに流
してこれを閉塞させる。ガス遮断弁４の閉塞によ
りｂ接点４ｂが開き、今までｂ接点４ｂを介して
側路されていた動作表示灯回路５の動作表示灯へ
の点灯信号およびブザー回路６の発振器の出力が
それぞれ動作表示灯およびブザーに印加され、こ
れにより動作表示灯回路５の動作表示灯が点灯
し、ブザー回路６のブザーが鳴動する。緊急操作
回路９は、緊急時や定期点検時に緊急スイツチ８
を閉じてガス遮断弁４を閉塞させる。ブザー回路
６は警報の役目をすました後または緊急事態やテ
スト時のように人為的にガス遮断弁４を閉塞させ
た時は動作表示灯回路５で表示すればよいので、
切換スイツチからなる鳴動停止スイツチ７を開放
側に切換えて回路を開放し、ブザー回路６の鳴動
を停止させて無用な騒音を発生させない。 The gas level determination circuit 1 compares a gas leak signal S 1 sent from a gas leak detector (not shown) with a reference voltage, and when it determines that the gas level in the air has reached a dangerous value, outputs a blockage signal S 2 as follows. delay circuit 2
This delay circuit 2 causes gas level determination circuit 1.
It is confirmed whether or not the determination is correct by checking whether or not the occlusion signal S2 is continuous. Valve drive circuit 3 is closed signal S 2
When this continues for the delay time of the delay circuit 2 or longer, a pulse is generated in response to a signal output from the delay circuit 2, and this pulse is passed through the coil 4a of the gas cutoff valve 4 to close it. When the gas cutoff valve 4 is closed, the B contact 4b opens, and the lighting signal to the operation indicator light of the operation indicator circuit 5 and the output of the oscillator of the buzzer circuit 6, which had been bypassed through the B contact 4b, are activated. The signal is applied to the indicator light and the buzzer, thereby lighting up the operation indicator light of the operation indicator light circuit 5 and causing the buzzer of the buzzer circuit 6 to sound. The emergency operation circuit 9 operates as an emergency switch 8 during an emergency or periodic inspection.
is closed to close the gas cutoff valve 4. After the buzzer circuit 6 has completed its role as an alarm, or when the gas cutoff valve 4 is artificially closed such as in an emergency situation or during a test, the operation indicator circuit 5 can be used to display the alarm.
A ringing stop switch 7 consisting of a changeover switch is switched to the open side to open the circuit, and the ringing of the buzzer circuit 6 is stopped to prevent unnecessary noise from being generated.
ところで、このように一つの装置に鳴動停止ス
イツチと緊急スイツチの二つの操作スイツチがあ
ると緊急時に操作に戸惑い易いという欠点があ
る。また、ブザーが鳴動した後や緊急時、テスト
時に鳴動停止スイツチを開放側に切換えたままリ
セツトを忘れると次回のガス漏れ時にブザーが鳴
動せず装置の機能が低下するという欠点がある。
By the way, when a single device has two operating switches, a ringing stop switch and an emergency switch, there is a drawback that it is easy to be confused about how to operate them in an emergency. Furthermore, if you forget to reset the buzzer after the buzzer has sounded, or in an emergency or during a test, with the buzzer stop switch set to the open side, there is a drawback that the buzzer will not sound the next time there is a gas leak and the functionality of the device will deteriorate.
そこで本考案の目的は、前述した従来装置の欠
点を除去し、操作性に優れ、その機能を十分発揮
させ得るガス遮断弁駆動装置を提供することにあ
る。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a gas cutoff valve drive device that eliminates the drawbacks of the conventional devices described above, has excellent operability, and can fully demonstrate its functions.
前述の目的を達成するために本考案は、ガス漏
れ検出器が発生するガス漏れ信号のレベルが所定
値に達すると閉塞信号を出力するガスレベル判定
回路、前記閉塞信号または緊急操作回路の操作で
パルスを発生しガス遮断弁を閉塞する弁閉塞手
段、該弁閉塞手段が動作して前記ガス遮断弁が閉
塞すると警報を発する音響回路と動作表示回路と
からなる警報手段を備えたガス遮断弁駆動装置に
おいて、前記ガスレベル判定回路と前記弁閉塞手
段との間に前記閉塞信号で前記音響回路の音響器
の鳴動を可能にし前記緊急操作回路の自動復帰式
緊急スイツチの操作で前記音響器への鳴動信号を
側路する音響回路制御手段を設け、前記緊急操作
回路の自動復帰式緊急スイツチはガス遮断弁の閉
塞用および音響回路の音響器の鳴動の停止用に兼
用したことを特徴とする。
In order to achieve the above-mentioned object, the present invention includes a gas level determination circuit that outputs a blockage signal when the level of a gas leakage signal generated by a gas leakage detector reaches a predetermined value; A gas cutoff valve drive comprising a valve closing means that generates a pulse to close the gas cutoff valve, and an alarm means consisting of an acoustic circuit and an operation display circuit that issue an alarm when the valve closing means operates and the gas cutoff valve is closed. In the apparatus, the occlusion signal is provided between the gas level determination circuit and the valve occlusion means to enable a sounder in the acoustic circuit to sound, and operation of an automatic reset emergency switch in the emergency operation circuit causes the sounder to sound. A sound circuit control means for bypassing the sound signal is provided, and the automatic return type emergency switch of the emergency operation circuit is used both for closing the gas cutoff valve and for stopping the sound of the sounder of the sound circuit.
ガス漏れが発生して閉塞信号が音響回路制御手
段に印加されると、この音響回路制御手段は音響
回路の音響器を鳴動可能状態とし、ガス遮断弁が
閉塞した際に直ちに音響回路の音響器が鳴動し、
この状態で緊急スイツチが押されると音響回路制
御手段は音響回路の音響器のための発振器出力を
側路することにより音響器の鳴動を停止させる。
ガス漏れのない常時において、緊急スイツチが押
されるとガス遮断弁が閉塞し、この時音響回路制
御手段は閉塞信号が印加されていないことにより
音響回路の音響器のための発振器出力を側路し、
これにより音響器の鳴動が抑止されている。
When a gas leak occurs and a blockage signal is applied to the acoustic circuit control means, the acoustic circuit control means enables the sounder of the acoustic circuit to sound, and when the gas cutoff valve is blocked, the sounder of the acoustic circuit is immediately activated. sounds,
When the emergency switch is pressed in this state, the acoustic circuit control means bypasses the output of the oscillator for the acoustic device of the acoustic circuit, thereby stopping the sounding of the acoustic device.
When there is no gas leak, the gas cutoff valve is closed when the emergency switch is pressed, and at this time, the acoustic circuit control means bypasses the oscillator output for the sounder of the acoustic circuit because the closure signal is not applied. ,
This suppresses the sound of the sounder.
本考案の一実施例を第１図に示すブロツク図に
基づいて詳細に説明する。なお、第１図において
第３図に示した従来例と同一のものには同一の符
号を付して説明の重複を避ける。
An embodiment of the present invention will be described in detail based on the block diagram shown in FIG. Components in FIG. 1 that are the same as those in the conventional example shown in FIG. 3 are given the same reference numerals to avoid duplication of explanation.
第１図に示す実施例においては音響回路制御手
段としての鳴動制御回路１１が設けられている点
が従来のものと相違する。ここで、鳴動制御回路
１１とこの鳴動制御回路１１に特に関連する弁駆
動回路３と緊急操作回路９の詳細を説明する。弁
駆動回路３はガス遮断弁４のコイル４ａとコンデ
ンサ１２と電流制限抵抗１３とサイリスタ１４が
全て直列に接続され、サイリスタ１４のゲートに
は遅延回路２の出力端が接続されている〔実願昭
59−97763号（実開昭61−13075号）考案の名称
「ガスしや断弁の中継器」参照〕。１５はサイリス
タ１４のゲートとカソードとの間に接続された抵
抗である。緊急操作回路９はサイリスタ１４のア
ノードとゲートとの間に接続された抵抗１６、ダ
イオード１７、自動復帰式押ボタンからなる緊急
スイツチ８の直列回路で、遅延回路２の入力側が
ダイオード１９を介してサイリスタ１４のアノー
ド側に接続されている。各回路は制御電源の電圧
Ｖを分割した基準電圧または制御電圧が印加され
て駆動する。鳴動制御回路１１は比較器２０の−
入力端に基準電圧Ｅが接続され、＋入力端がガス
レベル判定回路１の出力端に抵抗２５とダイオー
ド２６を介して接続されている。また、アノード
が比較器２０の＋入力端に接続されたダイオード
２１とアノードがブザー回路６に接続されたダイ
オード２２とのそれぞれのカソードが互いに接続
されて、緊急操作回路９のダイオード１７と緊急
スイツチ８の接続点に接続されている。また、比
較器２０の出力端にはアノードがブザー回路６に
接続されたダイオード２３のカソードが接続さて
いる。２４は比較器２０の＋入力端と出力端との
間に接続された抵抗である。 The embodiment shown in FIG. 1 differs from the conventional one in that a ringing control circuit 11 is provided as an acoustic circuit control means. Here, details of the ringing control circuit 11 and the valve drive circuit 3 and emergency operation circuit 9 particularly related to the ringing control circuit 11 will be explained. In the valve drive circuit 3, the coil 4a of the gas cutoff valve 4, the capacitor 12, the current limiting resistor 13, and the thyristor 14 are all connected in series, and the output end of the delay circuit 2 is connected to the gate of the thyristor 14. Akira
No. 59-97763 (Utility Model Application No. 61-13075), the name of the invention, ``Repeater for gas shutoff'']. 15 is a resistor connected between the gate and cathode of the thyristor 14. The emergency operation circuit 9 is a series circuit of an emergency switch 8 consisting of a resistor 16, a diode 17, and an automatic reset push button connected between the anode and gate of the thyristor 14. It is connected to the anode side of the thyristor 14. Each circuit is driven by applying a reference voltage or control voltage obtained by dividing the voltage V of the control power supply. The ringing control circuit 11 is connected to the − of the comparator 20.
A reference voltage E is connected to the input terminal, and a + input terminal is connected to the output terminal of the gas level determination circuit 1 via a resistor 25 and a diode 26. Further, the cathodes of the diode 21 whose anode is connected to the + input terminal of the comparator 20 and the diode 22 whose anode is connected to the buzzer circuit 6 are connected to each other, and the diode 17 of the emergency operation circuit 9 and the emergency switch are connected to each other. It is connected to 8 connection points. Further, the output terminal of the comparator 20 is connected to the cathode of a diode 23 whose anode is connected to the buzzer circuit 6. 24 is a resistor connected between the +input terminal and the output terminal of the comparator 20.
ガス漏れのない常時において、ガスレベル判定
回路１へのガス漏れ信号S1はローレベルであり、
遅延回路２、弁駆動回路３は動作せず、コンデン
サ１２が充電されている。このとき、ｂ接点４ｂ
は閉じているので動作表示灯回路５の動作表示灯
への電流が側路されて消灯している。ガスレベル
判定回路１へのガス漏れ信号S1がローレベルでガ
スレベル判定回路１の閉塞信号S2がローレベルで
あり、比較器２０の＋入力端への印加電圧がロー
レベルでその−入力端に印加された基準電圧Ｅよ
り低いことから比較器２０の出力はローレベルで
ある。従つて、ブザー回路６のブザーに印加され
る発振器の出力はダイオード２３を介して比較器
２０に流れ込んで側路されるように構成されてい
るので、例えｂ接点４ｂが開いてブザー回路６の
ブザーを鳴動させようとしてもブザーが鳴動する
ことはない。 At all times when there is no gas leak, the gas leak signal S1 to the gas level determination circuit 1 is at a low level,
The delay circuit 2 and valve drive circuit 3 do not operate, and the capacitor 12 is charged. At this time, b contact 4b
Since it is closed, the current to the operation indicator lamp of the operation indicator lamp circuit 5 is diverted and the lamp is turned off. The gas leak signal S 1 to the gas level determination circuit 1 is at a low level, the blockage signal S 2 of the gas level determination circuit 1 is at a low level, and the voltage applied to the + input terminal of the comparator 20 is at a low level and its − input is at a low level. Since it is lower than the reference voltage E applied to the terminal, the output of the comparator 20 is at a low level. Therefore, the output of the oscillator applied to the buzzer of the buzzer circuit 6 is configured to flow into the comparator 20 via the diode 23 and be bypassed. Even if you try to make the buzzer sound, the buzzer will not sound.
次にガス漏れが発生し、ガス漏れ信号S1がハイ
レベルになるとガスレベル判定回路１は閉塞信号
S2を出力する。この閉塞信号S2が遅延回路２によ
る遅延時間以上継続すると遅延回路２から弁駆動
回路３のサイリスタ１４のゲートに点弧信号が印
加される。これによりサイリスタ１４が導通して
コンデンサ１２が放電することによりコイル４ａ
に大きなパルス電流が流れ、ガス遮断弁４が閉塞
し、ｂ接点４ｂが開いて動作表示灯回路５に電流
が流れて点灯する。このとき、前記閉塞信号S2は
遅延回路２に入力するとともに比較器２０にも印
加されている。これにより比較器２０の出力はハ
イレベルとなつており、ダイオード２３を介して
ブザー回路６側から比較器２０への流れ込みが阻
止されているので、ブザー回路６のブザーはｂ接
点４ｂが開くことにより鳴動する。この状態で緊
急スイツチ８を閉じると、ガスレベル判定回路１
から発せたれた閉塞信号S2はダイオード２１−緊
急スイツチ８−抵抗１５を介して低減され、比較
器２０の出力はローレベルとなり、ブザー回路６
の出力はダイオード２３を介して比較器２０に流
れ込んで側路されるからブザー回路６のブザーは
鳴動を停止する。緊急スイツチ８が開かれた時閉
塞信号８2が継続していると比較器２０の出力が
ハイレベルとなることによりブザーが再び鳴動す
るので、今だガス漏れが復旧していないと判断す
ることが可能であり、緊急スイツチ８の開閉によ
り復旧状態を把握することができる。 Next, when a gas leak occurs and the gas leak signal S1 becomes high level, the gas level judgment circuit 1 sends a blockage signal.
Output S 2 . When this occlusion signal S 2 continues for longer than the delay time set by the delay circuit 2, an ignition signal is applied from the delay circuit 2 to the gate of the thyristor 14 of the valve drive circuit 3. As a result, the thyristor 14 becomes conductive and the capacitor 12 is discharged, so that the coil 4a
A large pulse current flows through, the gas cutoff valve 4 is closed, the b contact 4b is opened, and a current flows through the operation indicator light circuit 5, causing it to light up. At this time, the blocking signal S 2 is input to the delay circuit 2 and is also applied to the comparator 20 . As a result, the output of the comparator 20 is at a high level, and the flow from the buzzer circuit 6 side to the comparator 20 via the diode 23 is blocked. It makes a sound. If the emergency switch 8 is closed in this state, the gas level judgment circuit 1
The blockage signal S 2 emitted from the is reduced through the diode 21 - the emergency switch 8 - the resistor 15, and the output of the comparator 20 becomes low level, and the buzzer circuit 6
Flows into the comparator 20 via the diode 23 and is bypassed, so the buzzer of the buzzer circuit 6 stops sounding. If the blockage signal 82 continues when the emergency switch 8 is opened, the output of the comparator 20 becomes high level and the buzzer sounds again, so it can be determined that the gas leak has not been recovered yet. The recovery status can be determined by opening and closing the emergency switch 8.
ガス漏れのない常時において、緊急事態が発生
し、ガス遮断弁４を閉塞するため緊急スイツチ８
を閉じると、抵抗１３−抵抗１６−ダイオード１
７−緊急スイツチ８を介してサイリスタ１４のゲ
ートに点弧信号が印加され、サイリスタ１４が点
弧してコンデンサ１２が放電し、コイル４ａに大
きなパルス電流を流してガス遮断弁４を閉塞す
る。勿論この時ｂ接点４ｂが開いて動作表示灯回
路５の動作表示灯に電流が流れて点灯する。しか
しこの時ブザー回路６は閉塞信号S2がローレベル
であるから鳴動制御回路１１の比較器２０にブザ
ー駆動用の発振器の出力が流れ込んで側路されて
いるので、ブザーが鳴動することはない。すなわ
ち、ガス漏れによりガス遮断弁が閉塞してブザー
が鳴動したときは緊急スイツチでこれを停止し、
緊急スイツチを閉じてガス遮断弁を人為的に緊急
閉塞したときはブザーは初めから鳴動せず一つの
緊急スイツチでブザーの鳴動を制御できる。 When there is no gas leak, an emergency situation occurs and the emergency switch 8 is activated to close the gas cutoff valve 4.
When closed, resistor 13 - resistor 16 - diode 1
7- A firing signal is applied to the gate of the thyristor 14 via the emergency switch 8, which fires the thyristor 14 and discharges the capacitor 12, causing a large pulse current to flow through the coil 4a and closing the gas cutoff valve 4; Of course, at this time, the b contact 4b opens and current flows to the operation indicator lamp of the operation indicator lamp circuit 5, causing it to light up. However, at this time, the buzzer circuit 6 has a low level blocking signal S2 , so the output of the buzzer driving oscillator flows into the comparator 20 of the buzzer control circuit 11 and is bypassed, so the buzzer does not ring. . In other words, if the gas shutoff valve is blocked due to a gas leak and the buzzer sounds, use the emergency switch to stop it.
When the emergency switch is closed and the gas cutoff valve is artificially closed in an emergency manner, the buzzer does not sound from the beginning, and the sound of the buzzer can be controlled with a single emergency switch.
次に第２図は第１図と異なる実施例のブロツク
図である。第２図において、ガスレベル判定回路
１、遅延回路２、弁駆動回路３、ガス遮断弁４、
動作表示灯回路５、ブザー回路６、緊急操作回路
９、ガス漏れ表示回路１０は第１図の実施例と全
く同一である。しかしこの実施例では比較器を用
いた鳴動制御回路１１に代えてフリツプフロツプ
１２が接続されている点が第１図の実施例と異な
る。このフリツプフロツプ１２のセット端子Ｓに
はガスレベル判定回路１の出力端が接続され、リ
セツト端子Ｒには緊急操作回路９が接続されてい
る。そして、Ｑ出力端子でブザー回路６を制御す
る。 Next, FIG. 2 is a block diagram of an embodiment different from FIG. 1. In FIG. 2, a gas level determination circuit 1, a delay circuit 2, a valve drive circuit 3, a gas cutoff valve 4,
The operation indicator circuit 5, buzzer circuit 6, emergency operation circuit 9, and gas leak indicator circuit 10 are completely the same as in the embodiment shown in FIG. However, this embodiment differs from the embodiment shown in FIG. 1 in that a flip-flop 12 is connected instead of the ringing control circuit 11 using a comparator. The set terminal S of the flip-flop 12 is connected to the output terminal of the gas level determination circuit 1, and the reset terminal R is connected to the emergency operation circuit 9. Then, the buzzer circuit 6 is controlled by the Q output terminal.
閉塞信号S2がローレベルの時は既に述べたよう
に弁駆動回路３はガス遮断弁を閉塞することはな
い。この時点ではｂ接点４ｂは閉じているから動
作表示灯５の動作表示灯は消灯している。また、
フリツプフロツプ１２のセツト端子Ｓの入力はロ
ーレベルであるからＱ出力端子の出力もローレベ
ルで例えｂ接点４ｂが開いてもブザー回路６のブ
ザーが鳴動することはない。ここで、閉塞信号S2
がハイレベルになり弁駆動回路３に印加されると
ガス遮断弁４を閉塞する。するとｂ接点４ｂが開
いて動作表示灯回路５の動作表示灯が点灯する。
閉塞信号S2はフリツプフロツプ１２のセツト端子
Ｓにも印加されるからＱ出力端子の出力がハイレ
ベルになりブザー回路６のブザーが鳴動可能な状
態になり、ｂ接点４ｂが開くと同時に鳴動する。
ここで、緊急スイツチ８を閉じ緊急操作回路９か
らフリツプフロツプ１２のリセツト端子Ｒにハイ
レベルの信号が印加されるとＱ出力端子の出力が
ローレベルとなつてブザー回路６のブザーの鳴動
が停止する。緊急スイツチ８を開いた時閉塞信号
S2が継続しているとフリツプフロツプ１２は再び
セツトされてブザーが鳴動して今だにガス漏れが
復旧していないことが判明し、緊急スイツチ８の
開閉により復旧状態を把握することができる。 When the closing signal S2 is at a low level, the valve drive circuit 3 does not close the gas cutoff valve, as described above. At this point, the b contact 4b is closed, so the operation indicator light 5 is off. Also,
Since the input to the set terminal S of the flip-flop 12 is at a low level, the output from the Q output terminal is also at a low level, and even if the b contact 4b is opened, the buzzer of the buzzer circuit 6 will not sound. Here, the occlusion signal S 2
When the voltage reaches a high level and is applied to the valve drive circuit 3, the gas cutoff valve 4 is closed. Then, the b contact 4b opens and the operation indicator light of the operation indicator light circuit 5 lights up.
Since the closing signal S2 is also applied to the set terminal S of the flip-flop 12, the output of the Q output terminal becomes high level, and the buzzer of the buzzer circuit 6 becomes ready to sound, and it sounds at the same time as the b contact 4b opens.
Here, when the emergency switch 8 is closed and a high level signal is applied from the emergency operation circuit 9 to the reset terminal R of the flip-flop 12, the output of the Q output terminal becomes low level and the buzzer of the buzzer circuit 6 stops sounding. . Blockage signal when emergency switch 8 is opened
If S2 continues, the flip-flop 12 is set again and the buzzer sounds, indicating that the gas leak has not been recovered yet, and the recovery status can be ascertained by opening and closing the emergency switch 8.
ガスレベル判定回路１から閉塞信号S2が出力し
ていない常時において、緊急スイツチ８を閉じる
と弁駆動回路３はガス遮断弁４を閉じ、ガス遮断
弁４はｂ接点４ｂを開くからブザー６も鳴動しよ
うとする。しかし、この時フリツプフロツプ１２
のＱ出力端子の出力レベルは緊急操作回路９で抑
えられているからローレベルであり、ブザー回路
６のブザーは鳴動しない。すなわち、この第２図
に示す実施例も、第１図に示す実施例と同様に、
ガス漏れでガス遮断弁が自動的に閉塞してブザー
が鳴動した時はこれを停止し、緊急スイツチを閉
じてガス遮断弁を人為的に緊急閉塞した時は初め
からブザーが鳴動しないように自動復帰式押ボタ
ンからなる緊急スイツチ一つで制御することがで
きる。 When the emergency switch 8 is closed when the gas level determination circuit 1 is not outputting the blockage signal S2 , the valve drive circuit 3 closes the gas cutoff valve 4, and the gas cutoff valve 4 opens the b contact 4b, so the buzzer 6 is also activated. trying to ring. However, at this time flip-flop 12
Since the output level of the Q output terminal is suppressed by the emergency operation circuit 9, it is at a low level, and the buzzer of the buzzer circuit 6 does not sound. That is, the embodiment shown in FIG. 2 also has the same features as the embodiment shown in FIG.
When the gas cutoff valve is automatically closed due to a gas leak and the buzzer sounds, it will stop, and if the emergency switch is closed and the gas cutoff valve is artificially closed in an emergency, the buzzer will automatically stop sounding from the beginning. It can be controlled with a single emergency switch consisting of a reset push button.
以上に説明したように本考案によれば、ガス漏
れ検出器が発生するガス漏れ信号のレベルが所定
値に達すると閉塞信号を出力するガスレベル判定
回路、前記閉塞信号または緊急操作回路の操作で
パルスを発生しガス遮断弁を閉塞する弁閉塞手
段、該弁閉塞手段が動作して前記ガス遮断弁が閉
塞すると警報を発する音響回路と動作表示回路と
からなる警報手段を備えたガス遮断弁駆動装置に
おいて、前記ガスレベル判定回路と前記弁閉塞手
段との間に前記閉塞信号で前記音響回路の音響器
の鳴動を可能にし前記緊急操作回路の自動復帰式
緊急スイツチの操作で前記音響器への鳴動信号を
側路する音響回路制御手段を設け、前記緊急操作
回路の自動復帰式緊急スイツチはガス遮断弁の閉
塞用および音響回路の音響器の鳴動の停止用に兼
用したことことにより、ガス漏れによりガス遮断
弁が自動的に閉塞し音響器が鳴動したときはその
鳴動を停止し、人為的にガス遮断弁を閉塞したと
きは初めから音響器が鳴動しないように自動復帰
式押ボタンからなる緊急スイツチで操作すること
ができるから、緊急時の操作に戸惑つたり、音響
器の鳴動停止スイツチをリセツトすることを忘れ
て次回のガス漏れによる鳴動に支障を起こしたり
することがなく、またガス漏れによりガス遮断弁
が動作している時緊急スイツチを開閉することに
よりガス漏れの復旧状態を把握することができる
という優れたガス遮断弁駆動装置を提供すること
ができる。
As explained above, according to the present invention, the gas level determination circuit outputs a blockage signal when the level of the gas leakage signal generated by the gas leakage detector reaches a predetermined value, and the operation of the blockage signal or emergency operation circuit A gas cutoff valve drive comprising a valve closing means that generates a pulse to close the gas cutoff valve, and an alarm means consisting of an acoustic circuit and an operation display circuit that issue an alarm when the valve closing means operates and the gas cutoff valve is closed. In the apparatus, the closing signal is provided between the gas level determination circuit and the valve closing means to enable a sounder in the acoustic circuit to sound, and operation of an automatic reset emergency switch in the emergency operation circuit causes the sounder to sound. A sound circuit control means for bypassing the sound signal is provided, and the automatic return type emergency switch of the emergency operation circuit is used both to close the gas cutoff valve and to stop the sound of the sounder in the sound circuit, thereby preventing gas leakage. When the gas cutoff valve is automatically closed and the sounder starts ringing, the sounder will stop, and if the gas cutoff valve is artificially closed, the sounder will stop ringing from the beginning. Since it can be operated with an emergency switch, there is no need to be confused about how to operate it in an emergency, or forget to reset the sounder's sound stop switch and cause problems with the sound due to the next gas leak. It is possible to provide an excellent gas cut-off valve driving device that can grasp the recovery state of a gas leak by opening and closing an emergency switch when the gas cut-off valve is operating due to a gas leak.
第１図および第２図はそれぞれ本考案によるガ
ス遮断弁駆動装置の異なる実施例を示すブロツク
図であり、第３図はガス遮断弁駆動装置の従来装
置を示すブロツク図である。
１……ガスレベル判定回路、２……遅延回路、
３……弁駆動回路、４……ガス遮断弁、５……動
作表示灯回路、６……ブザー回路、９……緊急操
作回路、１１……鳴動制御回路、１２……フロツ
プフロツプ。
1 and 2 are block diagrams showing different embodiments of the gas cutoff valve driving device according to the present invention, and FIG. 3 is a block diagram showing a conventional gas cutoff valve driving device. 1...Gas level determination circuit, 2...Delay circuit,
3...Valve drive circuit, 4...Gas cutoff valve, 5...Operation indicator circuit, 6...Buzzer circuit, 9...Emergency operation circuit, 11...Sound control circuit, 12...Flop flop.
Claims (1)
ルが所定値に達すると閉塞信号を出力するガスレ
ベル判定回路、前記閉塞信号または緊急操作回路
の操作でパルスを発生しガス遮断弁を閉塞する弁
閉塞手段、該弁閉塞手段が動作して前記ガス遮断
弁が閉塞すると警報を発する音響回路と動作表示
回路とからなる警報手段を備えたガス遮断弁駆動
装置において、前記ガスレベル判定回路と前記弁
閉塞手段との間に前記閉塞信号で前記音響回路の
音響器の鳴動を可能にし前記緊急操作回路の自動
復帰式緊急スイツチの操作で前記音響器への鳴動
信号を側路する音響回路制御手段を設け、前記緊
急操作回路の自動復帰式緊急スイツチはガス遮断
弁の閉塞用および音響回路の音響器の鳴動の停止
用に兼用したことを特徴とするガス遮断弁駆動回
路。 A gas level determination circuit that outputs a closure signal when the level of a gas leak signal generated by a gas leak detector reaches a predetermined value, and a valve closure that generates a pulse by operating the closure signal or emergency operation circuit to close the gas cutoff valve. means, a gas cutoff valve driving device comprising an alarm means comprising an acoustic circuit and an operation display circuit that issue an alarm when the valve closing means operates and the gas cutoff valve is closed; and an acoustic circuit control means which enables the sounder of the acoustic circuit to sound in response to the blockage signal and bypasses the sound signal to the sounder by operating an automatic reset emergency switch of the emergency operation circuit. . A gas cutoff valve drive circuit, wherein the automatic return type emergency switch of the emergency operation circuit is used for both closing the gas cutoff valve and stopping sounding of a sounder in the acoustic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984179893U JPH0530238Y2 (en) | 1984-11-27 | 1984-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984179893U JPH0530238Y2 (en) | 1984-11-27 | 1984-11-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6194989U JPS6194989U (en) | 1986-06-19 |
| JPH0530238Y2 true JPH0530238Y2 (en) | 1993-08-02 |
Family
ID=30737457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984179893U Expired - Lifetime JPH0530238Y2 (en) | 1984-11-27 | 1984-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0530238Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115495A (en) * | 1974-07-30 | 1976-02-06 | Juwa Sangyo Kk | KOKANDOIJOKENSHUTSUKEIHOKI |
| JPS58130059A (en) * | 1982-01-29 | 1983-08-03 | 松下電工株式会社 | Gas shielding system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58138195U (en) * | 1982-03-15 | 1983-09-17 | 矢崎総業株式会社 | Gas leak alarm with shutoff valve |
-
1984
- 1984-11-27 JP JP1984179893U patent/JPH0530238Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115495A (en) * | 1974-07-30 | 1976-02-06 | Juwa Sangyo Kk | KOKANDOIJOKENSHUTSUKEIHOKI |
| JPS58130059A (en) * | 1982-01-29 | 1983-08-03 | 松下電工株式会社 | Gas shielding system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6194989U (en) | 1986-06-19 |
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