JP3335101B2 - Emergency shut-off valve device - Google Patents
Emergency shut-off valve deviceInfo
- Publication number
- JP3335101B2 JP3335101B2 JP09234397A JP9234397A JP3335101B2 JP 3335101 B2 JP3335101 B2 JP 3335101B2 JP 09234397 A JP09234397 A JP 09234397A JP 9234397 A JP9234397 A JP 9234397A JP 3335101 B2 JP3335101 B2 JP 3335101B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- emergency
- main
- emergency shut
- shut
- 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
Landscapes
- Safety Valves (AREA)
- Flow Control (AREA)
Description
【0001】[0001]
【発明の属する技術分野】この発明は、水道水の安定給
水のために設けられている配水池の配水管が地震等で破
損した場合に貯水の流出を防ぐための緊急遮断弁装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency shutoff valve device for preventing outflow of stored water when a distribution pipe of a distribution reservoir provided for stable supply of tap water is damaged due to an earthquake or the like.
【0002】[0002]
【従来の技術】各市町村が給水する水道システムでは、
各家庭で使用される水量が変動しても安定した給水を行
うため、小高い丘や山に配水池を設置しその落差を利用
して給水変動を補っている。この配水池には1日に使用
される平均水量の8〜12時間分を貯水しており、万一
地震等の災害が発生した時は緊急時給水用の用水として
上記貯水を確保する役目もする。2. Description of the Related Art In a water supply system supplied by each municipality,
In order to provide stable water supply even when the amount of water used in each household fluctuates, distribution reservoirs are installed on small hills and mountains, and the headwater is used to compensate for fluctuations in water supply. This reservoir stores 8 to 12 hours of the average amount of water used per day. In the event of a disaster such as an earthquake, the reservoir also serves as an emergency water supply. I do.
【0003】配水池の水を送り出す配水池流出部の配水
管には、流出部より下流側の配水管が地震等で破損した
場合に配水池の貯水が流出するのを防ぐため水道用緊急
遮断弁が設けられている。[0003] The distribution pipe at the outlet of the reservoir, which sends out water from the reservoir, has an emergency cutoff for water supply in order to prevent the reservoir water from flowing out if the distribution pipe downstream of the outlet is damaged by an earthquake or the like. A valve is provided.
【0004】この緊急遮断弁は、一般にはバタフライ弁
が用いられ、弁の操作レバーにウェイトを取付け、弁軸
に取付けたブレーキ又はロック手段で通常は弁を全開状
態に保持し、地震等の災害時には検出信号でブレーキ又
はロック手段を開放してウェイトの重量で弁閉動作を行
うように構成されている。ウェイトの重量で弁閉動作の
際には閉止速度を油圧緩衝装置によりコントロールして
ウォータハンマの発生を防止し、弁を全開状態にリセッ
トする際には手動又は電動式の開閉装置で弁軸を回転さ
せて全開させブレーキ又はロック手段で保持するように
なっている。This emergency shut-off valve is generally a butterfly valve. A weight is attached to an operation lever of the valve, and the valve is normally kept fully open by a brake or a lock means attached to a valve shaft. In some cases, the brake or locking means is released by a detection signal and the valve is closed by the weight of the weight. The closing speed is controlled by a hydraulic shock absorber to prevent the occurrence of water hammer during the valve closing operation by the weight of the weight, and the valve shaft is manually or electrically operated when the valve is reset to the fully open state. It is designed to be fully opened by rotating and held by brake or locking means.
【0005】[0005]
【発明が解決しようとする課題】ところで、上述した緊
急遮断弁を地震等の災害時に地震などの検出信号で閉じ
る方法として、地震の震度計が設定震度を超える震度を
検出するとその検出信号で閉じる、あるいは配水管内の
過流速を差圧スイッチ等で検出してそれにより閉じるな
どの方法が一般に利用されている。By the way, as a method of closing the above-mentioned emergency shut-off valve by a detection signal of an earthquake or the like in the event of a disaster such as an earthquake, when the seismic intensity meter of the earthquake detects a seismic intensity exceeding a set seismic intensity, it is closed by the detection signal. Alternatively, a method of detecting an overflow velocity in a water distribution pipe with a differential pressure switch or the like and closing the same by using such a method is generally used.
【0006】しかしながら、地震計による検出震度が設
定震度を超えていても配水池より下流側の配水管が必ず
破損しているとは限らず、又過流速が検出されたからと
いって例えば消火時に大量に水が消費されるような特別
の場合があり、必ず破損に結びつくとは限らない。設定
値が適正かどうか、又弁が有効に働くかどうかは実際の
ところ地震が発生し、管が破損して見ないと確かなこと
は分からないのである。[0006] However, even if the seismic intensity detected by the seismometer exceeds the set seismic intensity, the water distribution pipe downstream from the reservoir is not necessarily damaged. There are special cases where large amounts of water are consumed and this does not always lead to damage. Whether the set value is correct or the valve works effectively is, in fact, evident when an earthquake has occurred and the pipe has been damaged and cannot be confirmed.
【0007】一方、配水管の途中に何ら破損がないにも
拘らず何らかの原因で緊急遮断弁が閉となった場合、直
ちに断水となるため、この緊急遮断弁は常時監視状態に
置く必要があるが、一般に配水池が市街地から離れた高
い場所にあるため、人力であるいは電動で弁の開動作を
行うにしても大変な労力を必要とし維持管理が大変であ
る。On the other hand, if the emergency shut-off valve is closed for any reason even if there is no breakage in the middle of the water distribution pipe, the water is immediately cut off, so that the emergency shut-off valve must be constantly monitored. However, since the reservoir is generally located at a high place away from the city, opening the valve manually or electrically requires a great deal of labor and maintenance.
【0008】又、緊急遮断弁が万一の災害時に正常に作
動するかどうかの作動テストを通常時に時々行う必要が
あるが、弁閉動作を急激に行うとウォータハンマ(衝撃
圧)や管路内の水が下流へ引張られることにより上流部
に負圧が発生して生じる水柱分離で管の破損という二次
災害が発生する可能性がある。さらに、従来の緊急遮断
弁は構造が複雑なため非常に高価であるという難点もあ
る。[0008] In addition, it is necessary to conduct an operation test at normal times to check whether the emergency shut-off valve operates normally in the event of a disaster. However, if the valve closing operation is performed rapidly, a water hammer (impact pressure) or a pipe line will be required. There is a possibility that a secondary disaster of pipe breakage may occur due to water column separation caused by negative pressure generated in the upstream part due to the pulling of water in the downstream. Further, the conventional emergency shutoff valve has a disadvantage that it is very expensive due to its complicated structure.
【0009】この発明は、かかる従来の緊急遮断弁が有
する種々の問題点に留意して、地震等の災害時に配水管
が本当に破損したのかを圧力が大気圧か負圧となったか
によって正確に判別して緊急遮断弁を全閉とすることが
できる緊急遮断弁装置を提供することを課題とする。The present invention takes into account the various problems of the conventional emergency shut-off valve and accurately determines whether the water distribution pipe has been actually damaged during a disaster such as an earthquake, depending on whether the pressure has become atmospheric pressure or negative pressure. It is an object of the present invention to provide an emergency shutoff valve device that can determine and completely close an emergency shutoff valve.
【0010】[0010]
【課題を解決するための手段】この発明は、上記課題を
解決する手段として、配水管の破損による水の流出を緊
急遮断する主緊急遮断弁を主配水管に、この主配水管の
流れを主緊急遮断弁に対してバイパスさせるバイパス管
に副緊急遮断弁をそれぞれ設け、周辺地域の地震を検出
するよう設置される地震計と主配水管の圧力を検出する
よう設けられる圧力センサからの検出信号で両緊急遮断
弁の開閉動作を制御する制御回路を備え、制御回路が地
震計の検出信号が検出されると主緊急遮断弁を閉じ、そ
の後一定時間以上経過後の圧力センサの検出信号が大気
圧であれば副緊急遮断弁も閉じるようにして成る緊急遮
断弁装置としたのである。According to the present invention, as a means for solving the above problems, a main emergency shut-off valve for urgently shutting off the outflow of water due to breakage of a water distribution pipe is provided to the main water distribution pipe, and the flow of the main water distribution pipe is controlled. Sub-emergency shut-off valves are installed in the bypass pipes to bypass the main emergency shut-off valve, respectively. A seismometer installed to detect earthquakes in the surrounding area and a pressure sensor installed to detect pressure in the main water pipe A control circuit that controls the opening and closing operation of both emergency shutoff valves with a signal, the control circuit closes the main emergency shutoff valve when the detection signal of the seismometer is detected, and then the detection signal of the pressure sensor after a certain period of time has elapsed The emergency shut-off valve device is configured to close the sub-emergency shut-off valve at atmospheric pressure.
【0011】このような構成の緊急遮断弁装置によれ
ば、地震等の災害時に配水管の破損が本当に発生してい
る場合にのみ緊急遮断弁装置を全閉として配水池の貯水
の流出を防止できる。[0011] According to the emergency shut-off valve device having such a configuration, the emergency shut-off valve device is fully closed only when the water distribution pipe is actually damaged at the time of a disaster such as an earthquake to prevent the outflow of water from the reservoir. it can.
【0012】地震等の災害が発生すると地震検出信号に
より取り敢えず主緊急遮断弁が閉じられるが、副緊急遮
断弁は開いたままとされる。副緊急遮断弁を開いておく
ことにより主緊急遮断弁を緊急遮断したために生じるウ
ォータハンマや水柱分離による2次災害を防止するため
である。When a disaster such as an earthquake occurs, the main emergency shutoff valve is temporarily closed by the earthquake detection signal, but the secondary emergency shutoff valve is kept open. This is to prevent a secondary disaster caused by water hammer or water column separation caused by emergency closing of the main emergency shut-off valve by opening the sub-emergency shut-off valve.
【0013】その後一定時間が経過するとその時になお
圧力センサが負圧となっているか又は大気圧となってい
るかを検出信号から判断し、大気圧となっているときは
配水管の途中が破損していると判断して副緊急遮断弁を
閉じる。After a certain period of time, it is determined from the detection signal whether the pressure sensor is still at a negative pressure or at the atmospheric pressure at that time. And closes the secondary emergency shutoff valve.
【0014】圧力センサが負圧のままであれば配水管の
途中に破損がなく下流の水で引張られるために圧力が負
圧となっていると判断して地震信号があったにも拘らず
主緊急遮断弁を再開させるように制御が行われる。If the pressure sensor remains at a negative pressure, there is no breakage in the middle of the water distribution pipe and the water is pulled by the downstream water. Therefore, it is determined that the pressure is a negative pressure. Control is performed to restart the main emergency shutoff valve.
【0015】[0015]
【実施の形態】以下、この発明の実施の形態について図
面を参照して説明する。図1は配水池から実施形態の緊
急遮断弁装置を介して給水をするシステムの全体概念図
である。図示のように、配水池1は山や丘の上などの高
所に設置され、この配水池1からの給水は配水管2によ
り市街区の各消費家庭Aへ送られる。配水池1の貯水
は、図示していないが別途設けられた浄水場から給水ポ
ンプで給水されることにより行われる。なお、高所でな
く平坦地に設けられた給水ポンプから直接各消費家庭A
へ給水する水道システムとこの実施形態の給水システム
は全く別個のものである。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall conceptual diagram of a system for supplying water from a reservoir via the emergency shutoff valve device of the embodiment. As shown in the figure, the reservoir 1 is installed at a high place such as a mountain or a hill, and water supplied from the reservoir 1 is sent to each consumer household A in the city by a water pipe 2. Water is stored in the reservoir 1 by being supplied with water from a water purification plant (not shown) provided separately. In addition, each consumer household A directly from a water supply pump provided on
The water supply system for supplying water to the water supply system and the water supply system of this embodiment are completely separate.
【0016】この実施形態の緊急遮断弁装置10は、配
水池1の流出部に設けられており、配水管2と同径の主
配水管12に設けた主緊急遮断弁13と、この主緊急遮
断弁をバイパスするように主配水管12に両端を接続さ
れたバイパス管14に設けた副緊急遮断弁15とをユニ
ット化した緊急遮断弁ユニット11と、上記両緊急遮断
弁13、15を開閉制御する制御回路17とを備えてい
る。図2に上記緊急遮断弁ユニット11の外観斜視図、
図3にその平面図、側面図、正面図を示す。なお、12
a、12bは入口、出口、16は圧力計であり、測定値
は指示計に示すと共に、設定圧値の状態を検出してスイ
ッチ信号として送り出す形式のものである。図示のもの
では例えば最低負圧50mmHgまで測定できる圧力計
であり、負圧になればスイッチ信号が出力され、大気圧
(ゲージ圧0)になればスイッチ信号がOFFとなるこ
とで負圧と大気圧を検出できる。なお、負圧と大気圧を
別々に検出するため圧力スイッチを2つ設けたものとし
てもよい。The emergency shutoff valve device 10 of this embodiment is provided at the outlet of the reservoir 1 and has a main emergency shutoff valve 13 provided on a main water pipe 12 having the same diameter as the water pipe 2. Emergency shut-off valve unit 11 in which sub-emergency shut-off valve 15 provided in bypass pipe 14 having both ends connected to main water pipe 12 so as to bypass the shut-off valve, and opening and closing of both emergency shut-off valves 13 and 15 And a control circuit 17 for controlling. FIG. 2 is an external perspective view of the emergency shut-off valve unit 11,
FIG. 3 shows a plan view, a side view, and a front view. Note that 12
Reference numerals a and 12b denote inlets and outlets, and 16 a pressure gauge. The measured values are indicated on an indicator, and the state of the set pressure value is detected and sent out as a switch signal. In the illustrated example, the pressure gauge can measure up to a minimum negative pressure of 50 mmHg. When the negative pressure is reached, a switch signal is output. When the atmospheric pressure (gauge pressure is 0) is reached, the switch signal is turned off and the negative pressure is increased. Atmospheric pressure can be detected. Note that two pressure switches may be provided to separately detect the negative pressure and the atmospheric pressure.
【0017】主、副緊急遮断弁13、15は共に基本的
には同形式の遮断弁であるが、主緊急遮断弁13には弁
としてバタフライ弁、副緊急遮断弁15にはボール弁が
用いられ、それぞれの大きさが主配水管12の径とバイ
パス管14の径に合せたものとした点で異なっている。
なお、図示の例では主緊急遮断弁13は内径150mm
φ、副緊急遮断弁15は内径25mmφであり、このよ
うに径が小さくなるとボール弁形式でなければ製作でき
なくなるからである。The primary and secondary emergency shut-off valves 13 and 15 are basically the same type of shut-off valve, but a butterfly valve is used as the primary emergency shut-off valve 13 and a ball valve is used as the secondary emergency shut-off valve 15. The size of each of them is different from that of the main water distribution pipe 12 and the diameter of the bypass pipe 14.
In the illustrated example, the main emergency shutoff valve 13 has an inner diameter of 150 mm.
The φ, the secondary emergency shutoff valve 15 has an inner diameter of 25 mmφ, and if the diameter is reduced as described above, it cannot be manufactured unless it is a ball valve type.
【0018】図4に緊急遮断弁の具体例を示す。(a)
図は正面図、(b)図は側面図である。弁本体20内に
はバタフライ弁21が設けられ、弁の上部に延びる回転
軸22には(b)図の点線で示す経路で回転力を伝達す
る歯車機構が接続され、これを介してモータ13M、1
5Mからの動力が伝達される。なお、径の小さいものは
バタフライ弁はボール弁に替えられることは上述した通
りである。23は遮断弁ケースであり、後で説明するよ
うに制御回路17にバッテリが設けられていない場合は
その内部に緊急時の電源用のバッテリ24が内蔵され
る。25は開度計、26はクラッチ軸であり、矢視拡大
図のように、クラッチ軸26を引き出すと手動軸27か
ら回転力を手動で入力でき、押し込むと自動で弁の開閉
操作ができるようになっている。FIG. 4 shows a specific example of the emergency shutoff valve. (A)
The figure is a front view and the figure (b) is a side view. A butterfly valve 21 is provided in the valve body 20, and a gear mechanism for transmitting a rotational force is connected to a rotary shaft 22 extending above the valve through a path shown by a dotted line in FIG. , 1
Power from 5M is transmitted. As described above, a butterfly valve having a small diameter is replaced with a ball valve. Reference numeral 23 denotes a shut-off valve case. As will be described later, when a battery is not provided in the control circuit 17, a battery 24 for an emergency power supply is built therein. Reference numeral 25 denotes an opening meter, and reference numeral 26 denotes a clutch shaft. As shown in the enlarged view of the arrow, when the clutch shaft 26 is pulled out, a rotational force can be manually input from a manual shaft 27, and when the clutch shaft 26 is pushed in, the valve can be automatically opened and closed. It has become.
【0019】なお、図1に示すように、制御回路17に
は圧力計16の圧力検出信号と地震計18からの地震検
出信号が入力され、その検出信号に基づいて主、副緊急
遮断弁13、15のモータ13Mと15Mを開閉制御す
るように設けられている。制御回路17内には図示して
いないが緊急時の電源としてバッテリが内蔵され、万一
本来の電源が遮断されたときは緊急用のバッテリ電源に
より制御回路17とモータ13M、15Mが動作する。
又、主、副緊急遮断弁13、15には電磁ブレーキのよ
うなブレーキ手段やウェイトによる弁の自動閉鎖装置、
あるいは弁の閉鎖速度をコントロールするための油圧緩
衝装置などは設けられていない。As shown in FIG. 1, a pressure detection signal from a pressure gauge 16 and an earthquake detection signal from a seismometer 18 are input to a control circuit 17, and based on the detection signals, the main and auxiliary emergency shutoff valves 13 are provided. , 15 are controlled to open and close the motors 13M and 15M. Although not shown, a battery is built in the control circuit 17 as an emergency power supply. If the original power supply is cut off, the control circuit 17 and the motors 13M and 15M are operated by the emergency battery power supply.
The main and auxiliary emergency shutoff valves 13 and 15 are provided with automatic closing devices for valves by means of brakes such as electromagnetic brakes and weights.
Alternatively, no hydraulic shock absorber for controlling the closing speed of the valve is provided.
【0020】上記のような構成とした緊急遮断弁ユニッ
トによれば地震等の災害時に緊急遮断弁は次のように作
動する。以下図5のフローチャートを参照して説明す
る。制御が開始されると、まずステップS1 で自動か手
動かの制御方式が選択され、手動でない限り次のステッ
プへ進む。遮断弁は緊急時に手動操作できるように設計
されているからである。According to the emergency shut-off valve unit configured as described above, the emergency shut-off valve operates as follows in the event of a disaster such as an earthquake. This will be described below with reference to the flowchart of FIG. When the control is started, the automatic or manual control mode is selected first in step S 1, the process proceeds to the next step unless manually. This is because the shut-off valve is designed to be manually operated in an emergency.
【0021】ステップS2 、S3 で主、副遮断弁が開放
され、この状態で制御回路17は通常時は地震計の信号
を常に監視する。制御回路17は、例えば震度5以上の
ような設定地震を地震計18が感知すれば、ステップS
5 で主遮断弁13を閉とする信号を出力し、主遮断弁1
3が閉じられる。しかし、副遮断弁15は開放されたま
まである。At steps S 2 and S 3 , the main and sub shut-off valves are opened. In this state, the control circuit 17 normally monitors the seismometer signal at normal times. If the seismometer 18 detects a set earthquake having a seismic intensity of 5 or more, the control circuit 17 proceeds to step S
In step 5 , a signal for closing the main shutoff valve 13 is output, and the main shutoff valve 1 is output.
3 is closed. However, the secondary shutoff valve 15 remains open.
【0022】従って、主遮断弁13を急速に遮断したと
しても、給水はわずかにバイパス回路を経由して流れて
いるから、従来のような主遮断弁のみから成るシステム
で起こるようなウォータハンマ(衝撃圧)は生じない。
これは、地震計18からの検出信号が設定値以上であれ
ば、配水管経路の途中がどこか破損している可能性があ
るため、一応主遮断弁13を閉じて給水の大部分を停止
させ、その際急速に遮断をするとウォータハンマが生じ
るのを避けるためである。Therefore, even if the main shut-off valve 13 is rapidly shut off, the water supply is slightly flowing through the bypass circuit, so that a water hammer (such as occurs in a conventional system including only the main shut-off valve) is used. Impact pressure) does not occur.
This is because if the detection signal from the seismometer 18 is equal to or higher than the set value, there is a possibility that the water distribution pipe route may be broken somewhere, so the main shutoff valve 13 is closed and most of the water supply is stopped. This is to prevent the occurrence of water hammer when the cutoff is performed rapidly.
【0023】このような地震による信号で主遮断弁13
を閉じたときは、S6 でその地震による検出信号の瞬間
からタイマを作動させ一定時間が経過するとS7 で圧力
スイッチが負圧となっているかをチェックする。これ
は、もし配水管が破損していれば配水管内の圧力は低下
せず最終的には大気圧(ゲージ圧=0)となるが、破損
していなければ下流で使用される給水量を供給できない
ため圧力が低下し負圧となるからである。The main shut-off valve 13 receives a signal due to such an earthquake.
When the closed, checks the pressure switch S 7 when actuating the timer from the moment of the detection signal caused by the earthquake S 6 elapses a predetermined time has become a negative pressure. This means that if the water pipe is broken, the pressure in the water pipe will not decrease and will eventually reach the atmospheric pressure (gauge pressure = 0). This is because the pressure is reduced because of the inability to perform the operation, resulting in a negative pressure.
【0024】従って、圧力が負圧になれば配水管は破損
していないと判断され、ステップS2 の先頭に戻って主
遮断弁13を開放させる。もし、圧力が負圧にならず大
気圧に近づいたときは、S8 で配水管のいずれかに破損
が生じたものとして副遮断弁15を閉じ、配水池の水が
流出しないように確保する。[0024] Accordingly, it is determined that the pressure not the water pipe if the negative pressure is broken, to open the main shut-off valve 13 returns to the beginning of the step S 2. If, when the pressure approaches the atmospheric pressure does not become negative pressure, it closes the auxiliary shut-off valve 15 as damage to any of the water pipe at S 8 occurs, water distribution reservoir to ensure not to flow out .
【0025】上述した実施形態では緊急遮断弁ユニット
を配水池に接続された配水管から地震等による災害で給
水が流出するのを防止する例について説明したが、この
緊急遮断弁ユニットは、上記以外にも例えば高層ビルや
高層マンションなどで屋上に設けられた貯水タンクに接
続された配水管から地震等による災害で給水が流出する
のを防止するのにも規模は異なるが原理的には全く同様
に適用できる。In the above-described embodiment, an example has been described in which the emergency shutoff valve unit is used to prevent water from flowing out of the water distribution pipe connected to the reservoir due to a disaster such as an earthquake. For example, to prevent water from flowing out due to an earthquake or other disaster from a water pipe connected to a water storage tank installed on the roof of a high-rise building or high-rise apartment building, the scale is different, but in principle it is exactly the same Applicable to
【0026】なお、主緊急遮断弁13と副緊急遮断弁1
5はその内径の口径比が1/10〜1/5程度とすると
よい。The main emergency shutoff valve 13 and the secondary emergency shutoff valve 1
In the case of No. 5, the ratio of the inner diameter to the inner diameter is preferably about 1/10 to 1/5.
【0027】[0027]
【発明の効果】以上詳細に説明したように、この発明の
緊急遮断弁装置は主配水管に主緊急遮断弁、バイパス管
に副緊急遮断弁を設け、地震計と圧力センサの検出信号
で両遮断弁の開閉を制御する制御回路を備え、地震計の
検出信号で主緊急遮断弁を閉じた後一定時間後に圧力セ
ンサの検出信号が大気圧であれば副緊急遮断弁も閉じる
ようにしたから、地震等の災害時に主緊急遮断弁のみを
閉じることにより大部分の給水は一時的に停止させるが
副緊急遮断弁は開いておくことによりウォータハンマや
水柱分離を回避し、その後圧力センサで圧力が大気圧か
負圧かを検出して正確に配水管の破損の有無を検出して
副緊急遮断弁も閉じるため、配水管が地震等で本当に破
損したときを正確に検知して遮断弁を開閉操作できる。As described above in detail, the emergency shutoff valve device of the present invention has a main emergency shutoff valve in the main water distribution pipe and a sub emergency shutoff valve in the bypass pipe. A control circuit that controls the opening and closing of the shut-off valve is provided, and after the main emergency shut-off valve is closed by the detection signal of the seismometer, the secondary emergency shut-off valve is also closed if the detection signal of the pressure sensor is atmospheric pressure after a certain period of time. In the event of a disaster such as an earthquake, most of the water supply is temporarily stopped by closing only the main emergency shut-off valve, but the secondary emergency shut-off valve is kept open to avoid water hammer and water column separation. The sub-emergency shut-off valve is closed by detecting whether the water pipe is damaged and accurately detecting whether the water pipe has been damaged. Can be opened and closed.
【0028】又、両緊急遮断弁はモータ駆動で開閉でき
ればよく、両緊急遮断弁を一体にユニット化することに
より構造がシンプルで経済的なコストで製造できるなど
の利点が得られると共に、通常時に作動テストを手軽に
何度でも下流の給水に大きい影響を及ぼすことなく実施
できるなどの利点がある。Further, both emergency shut-off valves need only be opened and closed by driving a motor. By integrating the two emergency shut-off valves into a single unit, advantages such as simple construction and economical production can be obtained. There is an advantage that the operation test can be easily performed any number of times without greatly affecting downstream water supply.
【図1】実施形態の緊急遮断弁装置の全体システム概略
図FIG. 1 is an overall system schematic diagram of an emergency shutoff valve device according to an embodiment.
【図2】緊急遮断弁ユニットの外観斜視図FIG. 2 is an external perspective view of an emergency shutoff valve unit.
【図3】同上の平面図、側面図、正面図FIG. 3 is a plan view, a side view, and a front view of the above.
【図4】緊急遮断弁の構成図FIG. 4 is a configuration diagram of an emergency shutoff valve.
【図5】作用を説明するフローチャートFIG. 5 is a flowchart illustrating an operation.
1 配水池 2 配水管 10 緊急遮断弁装置 11 緊急遮断弁ユニット 12 主配水管 13 主緊急遮断弁 14 バイパス管 15 副緊急遮断弁 16 圧力計 17 制御回路 18 地震計 DESCRIPTION OF SYMBOLS 1 Reservoir 2 Distribution pipe 10 Emergency shutoff valve device 11 Emergency shutoff valve unit 12 Main distribution pipe 13 Main emergency shutoff valve 14 Bypass pipe 15 Secondary emergency shutoff valve 16 Pressure gauge 17 Control circuit 18 Seismograph
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F16K 17/36 G05D 7/00 - 7/06 G05D 16/00 - 16/20 E03B 1/00 E03B 11/00 ────────────────────────────────────────────────── ─── Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F16K 17/36 G05D 7 /00-7/06 G05D 16/00-16/20 E03B 1/00 E03B 11 / 00
Claims (4)
する主緊急遮断弁を主配水管に、この主配水管の流れを
主緊急遮断弁に対してバイパスさせるバイパス管に副緊
急遮断弁をそれぞれ設け、周辺地域の地震を検出するよ
う設置される地震計と主配水管の圧力を検出するよう設
けられる圧力センサからの検出信号で両緊急遮断弁の開
閉動作を制御する制御回路を備え、制御回路が地震計の
検出信号が検出されると主緊急遮断弁を閉じ、その後一
定時間以上経過後の圧力センサの検出信号が大気圧であ
れば副緊急遮断弁も閉じるようにして成る緊急遮断弁装
置。1. A main emergency shut-off valve for urgently shutting off the outflow of water due to breakage of a water distribution pipe, and a sub-emergency shut-off valve for a bypass pipe for bypassing the flow of the main water distribution pipe to the main emergency shut-off valve. Equipped with a control circuit that controls the opening and closing operations of both emergency shut-off valves with a detection signal from a seismometer installed to detect an earthquake in the surrounding area and a pressure sensor installed to detect the pressure of the main water pipe. When the detection signal of the seismometer is detected by the control circuit, the main emergency shut-off valve is closed, and after a predetermined time or more, if the detection signal of the pressure sensor is atmospheric pressure, the sub-emergency shut-off valve is also closed. Shut-off valve device.
急遮断弁を閉じ、その後一定時間以上経過後の圧力セン
サの検出信号が負圧であれば主緊急遮断弁を再開するよ
うにしたことを特徴とする請求項1に記載の緊急遮断弁
装置。2. The control circuit closes the main emergency shut-off valve in response to a detection signal from the seismometer, and then restarts the main emergency shut-off valve if the detection signal from the pressure sensor after a certain period of time has passed is negative. The emergency shutoff valve device according to claim 1, wherein:
テリを内蔵したものであることを特徴とする請求項1又
は2に記載の緊急遮断弁装置。3. The emergency shut-off valve device according to claim 1, wherein the control circuit includes a battery as a power supply in an emergency.
開、閉駆動され、主配水管上に設けた主緊急遮断弁とバ
イパス管上に設けた副緊急遮断弁とを一体にユニット化
して設けたことを特徴とする請求項1乃至3に記載の緊
急遮断弁装置。4. The main and sub emergency shut-off valves are opened and closed by a motor, and a main emergency shut-off valve provided on a main water distribution pipe and a sub-emergency shut-off valve provided on a bypass pipe are integrally unitized. The emergency shutoff valve device according to claim 1, wherein the emergency shutoff valve device is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09234397A JP3335101B2 (en) | 1997-04-10 | 1997-04-10 | Emergency shut-off valve device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP09234397A JP3335101B2 (en) | 1997-04-10 | 1997-04-10 | Emergency shut-off valve device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10281316A JPH10281316A (en) | 1998-10-23 |
JP3335101B2 true JP3335101B2 (en) | 2002-10-15 |
Family
ID=14051762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP09234397A Expired - Lifetime JP3335101B2 (en) | 1997-04-10 | 1997-04-10 | Emergency shut-off valve device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3335101B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006342503A (en) * | 2005-06-07 | 2006-12-21 | San-Ei Faucet Mfg Co Ltd | Abnormal water discharge preventing apparatus |
KR100989894B1 (en) * | 2008-12-26 | 2010-10-26 | (주) 삼진정밀 | Emergency valve |
JP6374287B2 (en) * | 2014-10-01 | 2018-08-15 | 株式会社タブチ | Shut-off valve |
JP6962169B2 (en) * | 2017-12-12 | 2021-11-05 | 住友金属鉱山株式会社 | Automatic shut-off device and automatic shut-off method that can prevent water hammer |
-
1997
- 1997-04-10 JP JP09234397A patent/JP3335101B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH10281316A (en) | 1998-10-23 |
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