JP3578754B2

JP3578754B2 - Water supply equipment and its operation control device

Info

Publication number: JP3578754B2
Application number: JP2003124405A
Authority: JP
Inventors: 和文立石; 輝雄山口; 辰夫大田; 智昭沼倉
Original assignee: Ebara Corp
Current assignee: Ebara Corp
Priority date: 2003-04-28
Filing date: 2003-04-28
Publication date: 2004-10-20
Anticipated expiration: 2015-11-20
Also published as: JP2003336296A

Description

【０００１】
【発明の属する技術分野】
本発明は、ポンプの吸込側に設けた受水槽に貯留された水を、ポンプで給排水する給水設備に係り、特に受水槽に設置した水位検知器による運転制御装置に関する。
【０００２】
【従来の技術】
図１３は、給水設備の運転制御装置の概略を示す。受水槽１には、ポンプ２が備えられ、受水槽１に貯えられた水を給水する。受水槽１には、その水位を検出するための電極棒３が設けられており、この電極棒間が水の存在により導通することで、水位を検出し、ポンプ２の運転を制御し、各種警報を発令し、又流入電磁弁４、水位調整弁５を開閉制御して受水槽１への市水の流入を調整する。
【０００３】
従来、ポンプ２吸込側の受水槽１に設置された、例えば電極棒のような水位検知器３は、異常増水警報と、渇水警報によるポンプの空運転防止を行う場合、図９のように電極棒４本で構成されている。また、図９に加えるに、渇水位でポンプが停止する前の事前警報として減水位警報を取る場合、図１０のように電極棒５本で構成されている。また、図９に市水流入電磁弁制御を付加すると、図１１のように電極棒６本で構成されている。
【０００４】
ここでいう市水流入電磁弁とは、図１３のように水位調整弁の子弁として使用され、受水槽１の水位がある一定値まで低下したら受水槽流入口の電磁弁４を開くことにより水位調整弁５が開き、受水槽に水を補給してやるための弁である。水位が再び上昇してある一定値まで達したら、電磁弁４を閉じることにより水位調整弁５が閉じ、受水槽１への水の補給を停止するものである。
【０００５】
さらに図９の装置に減水警報と市水流入電磁弁制御を付加すると、図１２のように電極棒７本で構成される。いずれも一番長い電磁棒はその他の電極棒の共通アースである。
以上のように、例えば図１２の制御を行う場合、電極棒が７本必要となり電極用配線も７本必要となり、図１１の制御を行う場合、電極棒が６本必要となり電極用配線も６本必要となる。
【０００６】
また、一般に電極棒を固定する電極保持器は、１個で最大５本まで電極棒を取り付けることができるため６本以上の電極を使う場合、電極保持器が２個必要となる。
したがって、各種水位制御を行う場合、使用する電極の本数や配線数および電極保持器の数が増え、また電極保持器を２個以上使用しなければならないため受水槽に電極保持器取り付け穴を２個以上開けなければならなかった。
また、従来の制御装置では、電極棒を５本以内とすると、異常増水や減水、渇水の警報または流入電磁弁の開閉等のいずれかの制御ができなかった。
【０００７】
【発明が解決しようとする課題】
本発明は上述の事情に鑑みなされたもので、より少ない水位検出器を用いて、受水槽の水位制御を行うことができる給水設備およびその運転制御装置を提供することを目的とする。
【０００８】
【課題を解決するための手段】
本発明の給水設備は、受水槽に貯留された水をポンプで給水する給水設備において、前記受水槽には各々検知水位の異なる複数の水位検知器を備え、第１の水位検知器を異常増水位検知用とし、第２の水位検知器を前記受水槽への市水の流入を制御する電磁弁の閉信号出力用とし、第３の水位検知器を前記電磁弁の開信号出力用及びポンプ空運転防止復帰出力用とし、第４の水位検知器を渇水位によるポンプ空運転防止出力用とすることを特徴とする。
【０００９】
又、前記ポンプ空運転防止出力は前記ポンプの強制停止信号であることを特徴とする。
又、前記第３の水位検知器は前記渇水位によるポンプ停止の事前警報としての減水位検知用としても用いることを特徴とする。
又、前記減水位は前記受水槽の水位が設定時間以上連続して前記第３の水位検知器未満である場合に検出することを特徴とする。
【００１０】
本発明の給水設備の運転制御装置は、受水槽に貯留された水をポンプで給水する給水設備の運転制御装置において、前記受水槽の第１水位以上になると異常増水と判断し、前記第１水位より低い第２水位になると前記受水槽への市水の流入を制御する電磁弁を閉じ、前記第２水位より低い第３水位以下になると前記電磁弁を開き、前記第３水位より低い第４水位以下になると前記ポンプを停止させ、ポンプの停止後に前記第３水位以上になるとポンプを復帰させるよう制御することを特徴とする。
【００１１】
本発明の給水設備の他の態様は、受水槽に貯留された水をポンプで給水する給水設備において、前記受水槽には各々検知水位の異なる複数の水位検知器を備え、第１の水位検知器を異常増水位検知用とし、第２の水位検知器を前記受水槽への市水の流入を制御する電磁弁の閉信号出力用及びポンプ空運転防止復帰出力用とし、第３の水位検知器を前記電磁弁の開信号出力用及びポンプ空運転防止出力用とすることを特徴とする。
【００１２】
又、前記受水槽の水位が設定時間以上連続して前記第３の水位検知器未満である場合に前記ポンプ空運転防止出力として前記ポンプの強制停止信号を出力することを特徴とする。
【００１３】
本発明の給水設備の運転制御装置の他の態様は、受水槽に貯留された水をポンプで給水する給水設備の運転制御装置において、前記受水槽に設けられた各々検知水位の異なる複数の水位検知器により前記受水槽への市水の流入を制御する電磁弁の開閉制御及び前記受水槽の渇水によるポンプ空運転防止のための前記ポンプの強制停止及び自動復帰を行い、前記複数の水位検知器のうちのひとつを前記電磁弁の閉信号出力用及びポンプ空運転防止復帰出力用とすることを特徴とする。
【００１４】
本発明の給水設備の運転制御装置の他の態様は、受水槽に貯留された水をポンプで給水する給水設備の運転制御装置において、前記受水槽に設けられた各々検知水位の異なる複数の水位検知器により前記受水槽への市水の流入を制御する電磁弁の開閉制御及び前記受水槽の渇水によるポンプ空運転防止のための前記ポンプの強制停止及び自動復帰を行い、前記複数の水位検知器のうちのひとつを前記電磁弁の閉信号出力用及びポンプ空運転防止復帰出力用とし、前記複数の水位検知器のうちの別のひとつを前記電磁弁の開信号出力用及びポンプ空運転防止出力用とすることを特徴とする。
【００１５】
本発明の給水設備の運転制御装置の好ましい態様は、ポンプの吸込側に設けた受水槽には、その水位を検知する各々検知水位の異なる４個の水位検知器を具備し、水位が、一番上位の第１の水位検知器以上で異常増水位状態と判断し、水位が、第１の水位検知器未満で非異常増水位状態と判断し、水位が上位から三番目の第３の水位検知器未満で前記受水槽に水を流入させる電磁弁の開信号を出力し、かつ減水位状態と判断し、水位が、第３の水位検知器以上で非減水位状態と判断し、また水位が、上位から二番目の第２の水位検知器以上に復帰したら前記電磁弁の閉信号を出力し、水位が上位から四番目の第４の水位検知器未満で渇水位状態と判断し、同時にポンプ空運転防止用強制停止信号を出力し、また水位が、第３の水位検知器以上に復帰したら非渇水位状態と判断し、同時にポンプ空運転防止用強制停止信号を解除するようになっている。
【００１６】
又、水位が、第３の水位検知器未満でその状態が予め設定された時限タイマの設定時間以上継続した場合、減水位状態と判断することが好ましい。
【００１７】
又、ポンプの吸込側に設けた受水槽には、その水位を検知する各々検知水位の異なる３個の水位検知器を具備し、水位が、一番上位の第１の水位検知器以上で異常増水位状態と判断し、水位が、第１の水位検知器未満で非異常増水位状態と判断し、水位が上位から三番目の第３の水位検知器未満で前記受水槽に水を流入させる電磁弁の開信号を出力し、また水位が、上位から二番目の第２の水位検知器以上に復帰したら前記電磁弁の閉信号を出力し、かつ水位が、第３の水位検知器未満でその状態が予め設定された時限タイマの設定時間以上継続した場合、渇水位状態と判断し、同時にポンプ空運転防止用強制停止信号を出力し、また水位が、第２の水位検知器以上に復帰したら非渇水位状態と判断し、同時にポンプ空運転防止用強制停止信号を解除することが好ましい。
【００１８】
【発明の実施の態様】
本発明は図１に示すように、ポンプの吸込側に設けた受水槽の水位を検知する水位検知器として、各々検知水位の異なる４個の水位検知器Ｌ１，Ｌ２，Ｌ３，Ｌ４を具備し、水位が、一番上位の第１の水位検知器Ｌ１以上で異常増水位状態と判断し、水位が、第１の水位検知器Ｌ１未満で非異常増水位状態と判断する。水位が上位から三番目の第３の水位検知器Ｌ３未満で流入電磁弁の開信号を出力し、かつ減水位状態と判断し、水位が、第３の水位検知器Ｌ３以上で非減水位状態と判断する。また水位が、上位から二番目の第２の水位検知器Ｌ２以上に復帰したら流入電磁弁の閉信号を出力して市水の流入を停止する。水位が上位から四番目の第４の水位検知器Ｌ４未満で渇水位状態と判断し、同時にポンプ空運転防止用強制停止信号を出力し、また水位が、第３の水位検知器Ｌ３以上に復帰したら非渇水位状態と判断し、同時にポンプ空運転防止用強制停止信号を解除している。
【００１９】
図４及び図５は、この運転制御装置の第１実施態様の制御フローを示す。まず図４（Ａ）のフローで、受水槽水位が第１の水位検知器Ｌ１以上であるか否かが判断される。“ＹＥＳ”である場合は、異常増水位状態と判断され、異常増水位を知らせるランプが点灯する。“ＮＯ”である場合は、異常増水位状態ではないと判断される。図４（Ｂ）のフローでは、受水槽水位が第３の水位検知器Ｌ３未満であるか否かが判断される。“ＹＥＳ”である場合は、減水位状態であると判断され、減水位を知らせるランプが点灯する。“ＮＯ”である場合は、検知された水位が第３の水位以上であり、非減水位状態と判断される。
【００２０】
図５（Ａ）は、市水流入電磁弁の開閉フローを示す。受水槽水位が第２の水位検知器Ｌ２以上であるか否かが判断される。そして、”ＹＥＳ”である場合は電磁弁が閉じられ、“ＮＯ”である場合は、受水槽水位が第３の水位検知器Ｌ３未満であるか否かが判断される。“ＹＥＳ”である場合は電磁弁が開かれ、”ＮＯ”である場合は、▲１▼第２の水位検知器Ｌ２以上の水位から下降してきた場合は電磁弁が閉じられる。そして、▲２▼第３の水位Ｌ３未満から上昇してきた場合は電磁弁が開かれる。
【００２１】
図５（Ｂ）は、渇水位状態の制御フローを示す。これは、受水槽水位が第４の水位検知器Ｌ４未満に達したときに、渇水位と判断してポンプの空運転防止のため、ポンプを停止すると共に渇水警報を出力する動作である。まず、受水槽水位が第３の水位検知器Ｌ３以上であるか否かが判断され、次に受水槽水位が第４の水位検知器Ｌ４未満であるか否かが判断される。そして、第３の水位検知器Ｌ３以上の水位から第４の水位検知器Ｌ４未満に下降してきたときに、ポンプの運転が停止され、同時に渇水警報が出される。そして、第４の水位検知器Ｌ４未満の水位から第３の水位検知器Ｌ３以上の水位に上昇してきたときに、ポンプが自動復帰し、その運転が可能となると共に渇水警報が解除される。
【００２２】
上記のようにポンプの吸込側に設けた受水槽の水位検出器Ｌ１，Ｌ２，Ｌ３，Ｌ４によって、第１の水位検知器Ｌ１を異常増水位検知用とし、第２の水位検知器Ｌ２を流入電磁弁閉信号出力用とする。第３の水位検知器Ｌ３を流入電磁弁開信号出力用および減水位検知用および渇水位によるポンプ空運転防止復帰出力用とし、第４の水位検知器Ｌ４を渇水位によるポンプ空運転防止出力用とする。これにより従来６個の水位検知器を必要とした水位制御を、４個の水位検知器で行うことができる。
【００２３】
図２は、本発明の第２の実施態様を示す。水位が、第３の水位検知器Ｌ３未満でその状態が予め設定された時限タイマの設定時間以上継続した場合、減水位状態と判断して減水位警報を出力するようにしている。図４（Ｃ）は、この制御フローを示す。
【００２４】
図４（Ｃ）のフローでは、受水槽水位が第３の水位検知器Ｌ３未満であることを検知した場合に、時限タイマがスタートする動作を示している。尚、電磁弁は図５（Ａ）のフローによりすぐに開く。まず、受水槽水位が第３の水位検知器Ｌ３未満であるか否かが判断される。“ＹＥＳ”である場合には、時限タイマがスタートし、そして時限タイマがタイムアップしたか否かが判断される。時限タイマがタイムアップしていない場合は、受水槽水位が第３の水位検知器Ｌ３以上であるか否かが再び判断され、“ＹＥＳ”である場合は、時限タイマがリセットされる。即ち、水位がＬ３以上に回復した場合には、減水位状態ではないと判断され、減水警報は出力されない。“ＮＯ”である場合は、時限タイマのカウントが継続され、タイムアップ時に水位がＬ３未満である場合は、減水位状態であると判断され、減水警報が出力される。
【００２５】
水位が第３の水位検知器Ｌ３未満で流入電磁弁が開き、徐々に水位が上昇していく場合は、正常動作のため一般的に流入電磁弁が開いた瞬間に同時に減水警報を出力する必要がない。また第３の水位検知器Ｌ３付近における水面の波立ち等で、水位が一定しない場合の減水警報のチャタリング防止ということもある。このため、水位が第３の水位検知器Ｌ３以下となり予め設定された時限タイマの設定時間内に水位が第３の水位検知器Ｌ３以上に上昇した場合は減水警報を出力せず、なんらかの原因で時限タイマの設定時間以上連続して水位が第３の水位検知器Ｌ３未満の場合に、初めて減水警報を出力することにしている。これにより、正常に水位が上昇した場合に不要な減水警報の出力をさせないことができる。
【００２６】
図３は、本発明の第３の実施態様を示す。ポンプの吸込側に設けた受水槽の水位を検知する水位検知器として、各々検知水位の異なる３個の水位検知器Ｓ１、Ｓ２，Ｓ３を具備する。水位が、一番上位の第１の水位検知器Ｓ１以上で異常増水位状態と判断し、水位が、第１の水位検知器Ｓ１未満で非異常増水位状態と判断する。水位が上位から三番目の第３の水位検知器Ｓ３未満で流入電磁弁の開信号を出力し、また水位が、上位から二番目の第２の水位検知器Ｓ２以上に復帰したら流入電磁弁の閉信号を出力し、かつ水位が、第３の水位検知器Ｓ３未満でその状態が予め設定された時限タイマの設定時間以上継続した場合、渇水位状態と判断し警報を出力すると共に、同時にポンプ空運転防止用強制停止信号を出力する。また水位が、第２の水位検知器Ｓ２以上に復帰したら非渇水位状態と判断し警報を解除すると共に、同時にポンプ空運転防止用強制停止信号を解除している。
【００２７】
図６は、第３の実施態様を示すフローチャートである。図６（Ａ）に示すように、受水槽水位が第１の水位検知器Ｓ１以上である場合には、異常増水位と判断し、異常増水位であることを示すランプを点灯する。
【００２８】
図６（Ｂ）は、市水流入電磁弁の開閉フローを示す。受水槽水位が第２の水位検知器Ｓ２以上であるか否かが判断される。そして、“ＮＯ”である場合は、受水槽水位が第３の水位検知器Ｓ３未満であるか否かが判断される。“ＮＯ”である場合は、▲１▼第２の水位検知器Ｓ２以上の水位から下降してきた場合は電磁弁が閉じられる。そして、▲２▼第３の水位Ｓ３未満から上昇してきた場合は電磁弁が開かれる。
【００２９】
図６（Ｃ）は、渇水位状態の制御フローを示す。これは、受水槽水位が第３の水位検知器Ｓ３未満に達したときに、渇水位と判断してポンプの空運転防止のため、ポンプを停止すると共に警報を出力する動作である。まず、受水槽水位が第２の水位検知器Ｓ２以上であるか否かが判断され、次に受水槽水位が第３の水位検知器Ｓ３未満であるか否かが判断される。そして、第２の水位検知器Ｓ２以上の水位から第３の水位検知器Ｓ３未満に下降してきたときに、ポンプの運転が停止され、同時に渇水警報が出される。そして、第３の水位検知器Ｓ３未満の水位から第２の水位検知器Ｓ２以上の水位に上昇してきたときに、ポンプが自動復帰してその運転が可能となると共に警報が解除される。
【００３０】
この制御フローにおいても、第３の水位検知器Ｓ３未満に達したか否かは、時限タイマにより一定時間内に水位が回復したか否かを確認して行うようになっている。即ち、時限タイマのカウント中に受水槽水位がＳ３以上に回復したら、渇水警報の出力及びポンプ停止は行なわれない。時限タイマがカウントアップして、尚、受水槽水位がＳ３未満である場合にのみ、渇水警報の出力及びポンプ停止が行なわれる。
【００３１】
このように、第１の水位検知器Ｓ１を異常増水位検知用とし、第２の水位検知器Ｓ２を流入電磁弁閉信号出力用および渇水位によるポンプ空運転防止復帰出力用とする。第３の水位検知器Ｓ３を流入電磁弁開信号出力用および渇水位によるポンプ空運転防止（停止信号）出力用とする。水位が第３の水位検知器Ｓ３未満で流入電磁弁が開き、徐々に水位が上昇していく場合は、正常動作のため一般的に流入電磁弁が開いた瞬間に同時に渇水警報およびポンプ空運転防止用強制停止信号を出力する必要がない。このため、水位が第３の水位検知器Ｓ３以下となり予め設定された時限タイマの設定時間内に水位が第３の水位以上に上昇した場合は渇水警報およびポンプ空運転防止用強制停止信号を出力せず、なんらかの原因で時限タイマの設定時間以上連続して水位が第３の水位未満の場合、初めて渇水警報およびポンプ空運転防止用強制停止信号を出力する。これにより、正常に水位が上昇した場合に不要な渇水警報およびポンプ空運転防止用強制停止信号を出力せず、従来５個の水位検知器を必要とした水位制御を３個の水位検知器Ｓ１，Ｓ２，Ｓ３で行うことができる。
【００３２】
【実施例】
次に、図７乃至図８を参照して、本発明の実施例を説明する。
【００３３】
図７は、本発明の第１実施例を示す。符号３３Ｗは液面リレーで、３３Ｗ内のリレーｘ１〜ｘ４は、各々電極Ｅ１〜Ｅ５間、Ｅ２〜Ｅ５間、Ｅ３〜Ｅ５間、Ｅ４〜Ｅ５間が水を介しての導通がある場合、各々ａ接点が閉となり、ｂ接点が開となる。一方、水がなく非導通の場合、各々ａ接点が開となり、ｂ接点が閉となる。
【００３４】
符号ＳＷはポンプの運転スイッチ、５２は動力回路の電磁接触器、Ｍは電動機、Ｐはポンプ、ＡＶは水位調整弁、ＳＶは水位調整弁ＡＶの子弁である通電時開、非通電時閉となる市水流入電磁弁、ＬＡ１〜ＬＡ３はランプ、Ｙ１〜Ｙ２は補助リレー、Ｔは時限タイマを示す。
【００３５】
▲１▼受水槽の水位が第１水位Ｌ１以上になるとＥ１〜Ｅ５間のリレーｘ１のａ接点が閉となり、異常増水ランプＬＡ１が通電され点灯する。水位が第１水位Ｌ１未満になるとリレーｘ１のａ接点が開となり、異常増水ランプＬＡ１が消灯する。
【００３６】
▲２▼受水槽の水位が第３水位Ｌ３未満になると、Ｅ３〜Ｅ５間のリレーｘ３のｂ接点が閉となり、時限タイマＴが作動する。時限タイマＴの設定時間内に水位が第３水位Ｌ３以上になると時限タイマＴのａ接点が閉じる前にリレーｘ３のｂ接点が開となり、減水ランプＬＡ２は点灯しない。
一方、時限タイマＴの設定時間内に水位が第３水位Ｌ３以上にならない場合、リレーｘ３のｂ接点が閉じ、かつ時限タイマＴのａ接点が閉じて減水ランプＬＡ２が通電され点灯する。その後水位が第３水位Ｌ３以上になるとリレーｘ３のｂ接点が開となり、時限タイマの動作が中止すると共に減水ランプＬＡ２が消灯する。
【００３７】
▲３▼受水槽の水位がＬ３未満になるとＥ３〜Ｅ５間のリレーｘ３のｂ接点が閉となり、さらに水位がＬ４未満になるとＥ４〜Ｅ５間のリレーｘ４のｂ接点が閉となり、渇水ランプＬＡ３が導通し点灯するとともに補助リレーＹ１のコイルが励磁され、補助リレーＹ１のａ接点がリレーｘ４のｂ接点と並列接続され自己保持回路を作る。
同時に電磁接触器５２のコイルと直列に接続された補助リレーＹ１のｂ接点が開となり、電磁接触器５２のコイルは非励磁となって動力回路の電磁接触器５２の接点が開となるためポンプモータは停止し空運転防止動作を行う。
【００３８】
一方、水位が上昇して第４水位Ｌ４以上になるとリレーｘ４のｂ接点は開となるが並列接続された補助リレーＹ１の自己保持ａ接点により補助リレーＹ１およびランプＬＡ３は励磁および点灯を継続する。
さらに水位が上昇して第３水位Ｌ３以上になるとリレーｘ３のｂ接点が開となり、補助リレーＹ１が非励磁およびランプＬＡ３が消灯し、同時に電磁接触器５２のコイルと直列に接続された補助リレーＹ１のｂ接点が閉となり、電磁接触器５２のコイルが励磁され、動力回路の電磁接触器５２の接点が閉となり自動復帰となってポンプモータが運転再開される。
【００３９】
▲４▼また、受水槽の水位が第２水位Ｌ２未満になるとＥ２〜Ｅ５間のリレーｘ２のｂ接点が閉となり、さらに水位が第３水位Ｌ３未満になるとＥ３〜Ｅ５間のリレーｘ３のｂ接点が閉となり、市水流入電磁弁ＳＶが通電されて電磁弁開となるとともに補助リレーＹ２のコイルが励磁され補助リレーＹ２のａ接点がリレーｘ３のｂ接点と並列接続され自己保持回路を作る。市水流入電磁弁ＳＶが開いて水位調整弁ＡＶから受水槽に水が補給され水位が上昇して第３水位Ｌ３以上になるとリレーｘ３のｂ接点が開となるが並列接続された補助リレーＹ２の自己保持ａ接点により補助リレーＹ２および市水流入電磁弁ＳＶは励磁および通電による開状態を継続する。
さらに水位が上昇して第２水位Ｌ２以上になるとリレーｘ２のｂ接点が開となり、補助リレーＹ２が非励磁および市水流入電磁弁ＳＶが無通電により閉となり、水位調整弁ＡＶが閉となる。
【００４０】
図８は、本発明の第２実施例を示す。符号３３Ｗは液面リレーで、３３Ｗ内のリレーｘ１〜ｘ３は、各々電極Ｅ１〜Ｅ４間、Ｅ２〜Ｅ４間、Ｅ３〜Ｅ４間が水を介しての導通がある場合、各々ａ接点が閉となり、ｂ接点が開となる。一方、水がなく非導通の場合、各々ａ接点が開となり、ｂ接点が閉となる。
【００４１】
符号ＳＷはポンプの運転スイッチ、５２は動力回路の電磁接触器、Ｍは電動機、Ｐはポンプ、ＡＶは水位調整弁、ＳＶは水位調整弁ＡＶの子弁である通電時開、非通電時閉となる市水流入電磁弁、ＬＡ１〜ＬＡ２はランプ、Ｙ１は補助リレー、Ｔは時限タイマを示す。
【００４２】
▲１▼受水槽の水位が第１水位Ｓ１以上になるとＥ１〜Ｅ４間のリレーｘ１のａ接点が閉となり、異常増水ランプＬＡ１が通電され点灯する。水位がＳ１未満になるとリレーｘ１のａ接点が開となり、異常増水ランプＬＡ１が消灯する。
【００４３】
▲２▼受水槽の水位が第３水位（ポンプ停止水位）Ｓ３未満になるとＥ３〜Ｅ４間のリレーｘ３のｂ接点が閉となり、時限タイマＴが作動する。時限タイマＴの設定時間内に水位が第３水位Ｓ３以上になると時限タイマＴのａ接点Ｔ２が閉じる前にリレーｘ３のｂ接点が開となり、渇水ランプＬＡ２は点灯しない。
一方、時限タイマＴの設定時間内に水位が第３水位Ｓ３以上にならない場合、リレーｘ２およびｘ３のｂ接点が閉じ、かつ時限タイマＴのａ接点Ｔ２が閉じて渇水ランプＬＡ２が通電され点灯するとともに、タイマＴのもう一方のａ接点Ｔ１がリレーｘ３のｂ接点と並列接続され自己保持回路を作る。
【００４４】
同時に電磁接触器５２のコイルと直列に接続されたタイマＴのｂ接点が開となり電磁接触器５２のコイルは非励磁となって動力回路の電磁接触器５２の接点が開となるためポンプモータは停止し空運転防止動作を行う。
一方、水位が上昇して第３水位Ｓ３以上になるとリレーｘ３のｂ接点は開となるが並列接続されたタイマＴの自己保持ａ接点Ｔ１によりタイマＴは励磁を、またもう一方のタイマＴのａ接点Ｔ２によりランプＬＡ２は点灯を継続する。
さらに水位が上昇して第２水位Ｓ２以上になるとリレーｘ２のｂ接点が開となり、タイマＴが非励磁およびランプＬＡ２が消灯し、同時に電磁接触器５２のコイルと直列に接続されたタイマＴのｂ接点が閉となり、電磁接触器５２のコイルが励磁され動力回路の電磁接触器５２の接点が閉となり自動復帰となってポンプモータが運転再開される。
【００４５】
▲３▼受水槽の水位が第２水位Ｓ２未満になるとＥ２〜Ｅ４間のリレーｘ２のｂ接点が閉となり、さらに水位が第３水位Ｓ３未満になるとＥ３〜Ｅ４間のリレーｘ３のｂ接点が閉となり、市水流入電磁弁ＳＶが通電されて電磁弁開となるとともに補助リレーＹ１のコイルが励磁され補助リレーＹ１のａ接点がリレーｘ３のｂ接点と並列接続され自己保持回路を作る。市水流入電磁弁ＳＶが開いて水位調整弁ＡＶから受水槽に水が補給される。水位が上昇して第３水位以上になるとリレーｘ３のｂ接点は開となるが並列接続された補助リレーＹ１の自己保持ａ接点により補助リレーＹ１および市水流入電磁弁ＳＶは励磁および通電による開状態を継続する。
【００４６】
さらに水位が上昇して第２水位Ｓ２以上になるとリレーｘ２のｂ接点が開となり、補助リレーＹ１が非励磁および市水流入電磁弁ＳＶが無通電により閉となり、水位調整弁ＡＶが閉となり、市水の流入が停止する。
【００４７】
尚、上記実施例では水位検知器を電極棒として説明したが、水位検出器は電極棒に限られるものではなく、フロートスイッチ等の水位検知器でも同一の効果が得られることは言う迄もない。又、電極棒或いはフロートスイッチのように、検出する水位に対応した複数の装置を用いるのでなく、１個の例えば水圧計等を用い、そのアナログ的な出力から、第１、第２、第３等の水位を検出するようにしてもよい。又、本実施例では受水槽の水を加圧送水する例について説明したが、受水槽に貯えられた水を排水する場合にも、本発明の趣旨を同様に適用できるのは勿論のことである。さらに又、受水槽に流入する水を電磁弁の開閉と水位調整弁の開閉を用いた例を説明したが、電磁弁の開閉でこれを行っても勿論よく、又他の開閉手段を用いても勿論よい。
【００４８】
また、上記液面リレー３３Ｗ内のリレーｘ１〜ｘ４等の接点動作および市水流入電磁弁の通電時開等の動作は、本実施例の動作のものに限られるものではなく、他の動作特性のものにおいても相当の回路構成にすれば同一の制御が行えること、並びにそれ以外の回路についても本実施例の回路構成に限られるものではないことは勿論のことである。このように本発明の趣旨を逸脱することなく、種々の変形実施例が可能である。
【００４９】
【発明の効果】
以上に説明したように、本発明によれば、下記のような優れた効果がある。
ポンプの吸込側に設けた受水槽の水位検知器として、第１の水位検知器を異常増水位検知用とし、第２の水位検知器を流入電磁弁閉信号出力用とし、第３の水位検知器を流入電磁弁開信号出力用および減水位検知用および渇水位によるポンプ空運転防止復帰用とする。第４の水位検知器を渇水位によるポンプ空運転防止出力用とする。このことにより従来６個の水位検知器を必要とした水位制御を４個の水位検知器で行うことができる。
【００５０】
また、上述した水位が第３の水位検知器未満で市水の流入電磁弁が開き、徐々に水位が上昇していく場合は、正常動作のため一般的に流入電磁弁が開いた瞬間に同時に減水警報を出力する必要がない。第３の水位検知器付近における水面の波立ち等で水位が一定しない場合の減水警報のチャタリング防止ということもあり、水位が第３の水位検知器以下となり予め設定された時限タイマの設定時間内に水位が第３の水位検知器以上に上昇した場合には、減水警報を出力しない。なんらかの原因で時限タイマの設定時間以上連続して水位が第３の水位検知器未満の場合、初めて減水警報を出力することにより、正常に水位が上昇した場合に不要な減水警報を出力させないことができる。
【００５１】
また、第１の水位検知器を異常増水位検知用とし、第２の水位検知器を流入電磁弁閉信号出力用および渇水位によるポンプ空運転防止復帰出力用とする。第３の水位検知器を流入電磁弁開信号出力用および渇水位によるポンプ空運転防止出力用とする。渇水位によるポンプ空運転防止出力用は水位が第３の水位検知器未満で流入電磁弁が開き、徐々に水位が上昇していく場合は、正常動作のため一般的に流入電磁弁が開いた瞬間に同時に渇水警報およびポンプ空運転防止用強制停止信号を出力する必要がない。水位が第３の水位検知器以下となり、なんらかの原因で時限タイマの設定時間以上連続して水位が第３の水位検知器未満の場合、初めて渇水警報およびポンプ空運転防止用強制停止信号を出力する。このことにより、正常に水位が上昇した場合に不要な渇水警報およびポンプ空運転防止用強制停止信号を出力しない。そして、従来５個の水位検知器を必要とした水位制御を３個の水位検知器で行うことができる。
【図面の簡単な説明】
【図１】本発明の第１実施態様の運転制御装置の説明図。
【図２】本発明の第２実施態様の運転制御装置の説明図。
【図３】本発明の第３実施態様の運転制御装置の説明図。
【図４】本発明の第１実施態様の運転制御装置の制御フロー図。
【図５】本発明の第２実施態様の運転制御装置の制御フロー図。
【図６】本発明の第３実施態様の運転制御装置の制御フロー図。
【図７】本発明の第１実施例の運転制御装置の回路図。
【図８】本発明の第２実施例の運転制御装置の回路図。
【図９】従来の運転制御装置の説明図であり、電極棒を４本用いた例を示す。
【図１０】従来の運転制御装置の説明図であり、電極棒を５本用いた例を示す。
【図１１】従来の運転制御装置の説明図であり、電極棒を６本用いた例を示す。
【図１２】従来の運転制御装置の説明図であり、電極棒を７本用いた例を示す。
【図１３】給水設備の概略を示す説明図。
【符号の説明】
１受水槽
２ポンプ
３電極棒
４流入電磁弁
５水位調整弁
Ｌ１，Ｌ２，Ｌ３，Ｌ４水位（検知器）
Ｓ１，Ｓ２，Ｓ３，Ｓ４水位（検知器）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water supply system for supplying and draining water stored in a water receiving tank provided on a suction side of a pump by a pump, and particularly to an operation control device using a water level detector installed in the water receiving tank.
[0002]
[Prior art]
FIG. 13 schematically shows an operation control device of the water supply facility. The water receiving tank 1 is provided with a pump 2 for supplying water stored in the water receiving tank 1. The water receiving tank 1 is provided with electrode rods 3 for detecting the water level. The electrode rods 3 are electrically connected by the presence of water to detect the water level, control the operation of the pump 2, and perform various operations. An alarm is issued, and the inflow solenoid valve 4 and the water level adjusting valve 5 are opened and closed to regulate the inflow of city water into the water receiving tank 1.
[0003]
Conventionally, a water level detector 3 such as an electrode rod, which is installed in a water receiving tank 1 on the suction side of the pump 2, is used to prevent the pump from running idle by an abnormally high water alarm and a drought alarm as shown in FIG. It consists of four bars. Further, in addition to FIG. 9, when a low water level warning is issued as a pre-warning before the pump stops at a low water level, it is configured with five electrode rods as shown in FIG. 10. Further, when the city water inflow solenoid valve control is added to FIG. 9, it is configured with six electrode rods as shown in FIG.
[0004]
As used herein, the city water inflow solenoid valve is used as a child valve of a water level adjustment valve as shown in FIG. 13. When the water level of the water receiving tank 1 drops to a certain value, the solenoid valve 4 at the water inlet of the water receiving tank is opened. The water level adjusting valve 5 is opened and is a valve for supplying water to the water receiving tank. When the water level rises again and reaches a certain value, the solenoid valve 4 is closed to close the water level adjustment valve 5 and stop the supply of water to the water receiving tank 1.
[0005]
Further, when the water reduction alarm and the city water inflow solenoid valve control are added to the apparatus of FIG. 9, the apparatus is composed of seven electrode rods as shown in FIG. In each case, the longest electromagnetic rod is a common ground for the other electrode rods.
As described above, for example, when the control of FIG. 12 is performed, seven electrode rods are required and seven electrode wirings are also required. When the control of FIG. 11 is performed, six electrode rods are required and the electrode wiring is also six. You need a book.
[0006]
In general, a maximum of five electrode holders can be attached to one electrode holder for fixing the electrode rods. Therefore, when six or more electrodes are used, two electrode holders are required.
Therefore, when performing various water level controls, the number of electrodes used, the number of wires, and the number of electrode holders increase, and two or more electrode holders must be used. I had to open more than one.
Further, in the conventional control device, if the number of electrode rods is five or less, it is not possible to perform any control such as an abnormal increase or decrease of water, a drought warning, or opening and closing of the inflow solenoid valve.
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and has as its object to provide a water supply facility capable of controlling the water level of a water receiving tank using a smaller number of water level detectors, and an operation control device therefor.
[0008]
[Means for Solving the Problems]
The water supply equipment of the present invention is a water supply equipment for supplying water stored in a water receiving tank by a pump, wherein the water receiving tank is provided with a plurality of water level detectors each having a different detected water level, and the first water level detector is abnormally increased in water. A second water level detector for outputting a closed signal of an electromagnetic valve for controlling inflow of city water into the water receiving tank, and a third water level detector for outputting an open signal of the electromagnetic valve and a pump. The fourth embodiment is characterized in that the fourth water level detector is used for a pump idle operation prevention output based on a drought level.
[0009]
Also, the pump idle operation prevention output is a forced stop signal of the pump.
Further, the third water level detector is also used for detecting a low water level as an advance warning of a pump stop due to the low water level.
Further, the water level is detected when the water level in the water receiving tank is lower than the third water level detector continuously for a set time or more.
[0010]
An operation control device for a water supply facility of the present invention is an operation control device for a water supply facility for supplying water stored in a water receiving tank by a pump, wherein when the water level of the water receiving tank is equal to or higher than a first water level, the first water level is determined to be abnormally high. When the second water level lower than the water level is reached, the solenoid valve for controlling the inflow of city water into the water receiving tank is closed, and when the water level falls below the third water level lower than the second water level, the solenoid valve is opened. It is characterized in that the pump is stopped when the water level is equal to or lower than 4 water levels, and the pump is restored when the water level is equal to or higher than the third water level after the pump is stopped.
[0011]
Another aspect of the water supply equipment of the present invention is a water supply equipment for supplying water stored in a water receiving tank by a pump, wherein the water receiving tank is provided with a plurality of water level detectors having different detection water levels, and the first water level detection is performed. A third water level detector is used for detecting an abnormally high water level, a second water level detector is used for outputting a closing signal of a solenoid valve for controlling the inflow of city water into the water receiving tank, and a pump idle operation prevention return output. And a pump for outputting an open signal of the solenoid valve and an output for preventing an idle operation of the pump.
[0012]
Further, when the water level in the water receiving tank is continuously lower than the third water level detector for a set time or more, the forcible stop signal of the pump is output as the pump idle operation prevention output.
[0013]
Another aspect of the operation control device for a water supply facility of the present invention is an operation control device for a water supply facility for supplying water stored in a water receiving tank by a pump, wherein a plurality of water levels provided in the water receiving tank and having different detected water levels are provided. The detector controls opening / closing of an electromagnetic valve for controlling inflow of city water into the water receiving tank and forcibly stops and automatically returns the pump to prevent the pump from running idle due to drought of the water receiving tank, and detects the plurality of water levels. One of the devices is used for outputting the closing signal of the solenoid valve and for outputting the pump idle operation prevention return.
[0014]
Another aspect of the operation control device for a water supply facility of the present invention is an operation control device for a water supply facility for supplying water stored in a water receiving tank by a pump, wherein a plurality of water levels provided in the water receiving tank and having different detected water levels are provided. The detector controls opening / closing of an electromagnetic valve for controlling inflow of city water into the water receiving tank and forcibly stops and automatically returns the pump to prevent the pump from running idle due to drought of the water receiving tank, and detects the plurality of water levels. One of the detectors is used for outputting the close signal of the solenoid valve and for the pump idle operation prevention return output, and another one of the plurality of water level detectors is used for outputting the open signal of the solenoid valve and preventing the pump idle operation. It is characterized by being used for output.
[0015]
In a preferred embodiment of the operation control device of the water supply equipment of the present invention, the water receiving tank provided on the suction side of the pump is provided with four water level detectors having different detection water levels for detecting the water level, and the water level is one. It is determined that the water level is abnormally high when the water level is higher than the first water level detector, and that the water level is non-abnormal when the water level is lower than the first water level detector. An output signal of an electromagnetic valve that causes water to flow into the water receiving tank below the detector is output, and it is determined that the water level is low, and the water level is determined to be a non-low water level by the third water level detector or higher. However, when returning to the second or higher second water level detector or more from the top, it outputs the close signal of the solenoid valve, determines that the water level is less than the fourth fourth water level detector from the top and is in the drought level state, Outputs forced stop signal to prevent pump idle operation, and the water level is higher than the third water level detector Once restored is determined that a non-empty water level state, so as to release the forced stop signal for pump dry running simultaneously prevented.
[0016]
In addition, when the water level is lower than the third water level detector and the state continues for a preset time of a timed timer or more, it is preferable to determine that the water level is a low water level state.
[0017]
In addition, the water receiving tank provided on the suction side of the pump is provided with three water level detectors, each detecting a different water level, and the water level is abnormal when the water level is higher than the first highest water level detector. It is determined that the water level is in the rising water level, the water level is determined to be in the non-abnormal water rising state when the water level is lower than the first water level detector, and the water flows into the water receiving tank when the water level is lower than the third third water level detector from the top. Outputs an open signal of the solenoid valve, and outputs the close signal of the solenoid valve when the water level returns to the second or higher second water level detector, and the water level is lower than the third water level detector. If the state continues for a preset time of the timed timer or longer, it is determined that the water level is low, and at the same time, a forced stop signal for preventing pump idle operation is output, and the water level returns to a level higher than the second water level detector. The pump is judged to be in the non-dry level state, It is preferable to release the.
[0018]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
As shown in FIG. 1, the present invention includes four water level detectors L1, L2, L3, and L4 having different detection water levels as water level detectors for detecting a water level of a water receiving tank provided on a suction side of a pump. , The water level is determined to be in the abnormally high water level state when it is equal to or higher than the first highest water level detector L1, and the water level is determined to be in the non-abnormal water level state when the water level is lower than the first water level detector L1. When the water level is lower than the third highest water level detector L3, an output signal of the inflow solenoid valve is output, and it is determined that the water level is low, and the water level is not higher than the third water level detector L3. Judge. When the water level returns to the second water level detector L2 or higher, which is the second highest from the top, a closing signal of the inflow solenoid valve is output to stop the inflow of city water. When the water level is lower than the fourth highest water level detector L4, it is determined that the water level is low, and at the same time, a forced stop signal for preventing pump idle operation is output, and the water level returns to the third water level detector L3 or higher. Then, it is determined that the water level is not low, and at the same time, the forced stop signal for preventing the pump from running idle is released.
[0019]
4 and 5 show a control flow of the first embodiment of the operation control device. First, in the flow of FIG. 4A, it is determined whether or not the water level in the receiving tank is equal to or higher than the first water level detector L1. If "YES", it is determined that the water level is abnormally high, and a lamp for informing the abnormal water level is turned on. If “NO”, it is determined that the state is not the abnormally high water level. In the flow of FIG. 4B, it is determined whether or not the water level in the receiving tank is lower than the third water level detector L3. If "YES", it is determined that the water level is low, and a lamp for indicating the water level is turned on. If “NO”, the detected water level is equal to or higher than the third water level, and it is determined that the water level is not reduced.
[0020]
FIG. 5A shows an opening / closing flow of the city water inflow solenoid valve. It is determined whether or not the receiving tank water level is equal to or higher than the second water level detector L2. If "YES", the solenoid valve is closed, and if "NO", it is determined whether the water level in the receiving tank is lower than the third water level detector L3. If “YES”, the solenoid valve is opened. If “NO”, (1) the solenoid valve is closed if the water level has dropped from the second water level detector L2 or higher. (2) When the water level rises below the third water level L3, the solenoid valve is opened.
[0021]
FIG. 5B shows a control flow in a drought level state. This is an operation of judging that the water level is lower than the fourth water level detector L4, determining that the water level is low, stopping the pump, and outputting a water shortage warning to prevent the pump from running idle. First, it is determined whether or not the water level of the receiving tank is equal to or higher than the third water level detector L3, and then it is determined whether or not the water level of the receiving tank is lower than the fourth water level detector L4. Then, when the water level falls from the third water level detector L3 or higher to a level lower than the fourth water level detector L4, the operation of the pump is stopped, and a drought warning is issued at the same time. Then, when the water level rises from a water level lower than the fourth water level detector L4 to a water level higher than the third water level detector L3, the pump automatically recovers, the operation becomes possible, and the drought warning is canceled.
[0022]
As described above, the first water level detector L1 is used for detecting an abnormally high water level, and the second water level detector L2 is supplied by the water level detectors L1, L2, L3, and L4 of the water receiving tank provided on the suction side of the pump. For solenoid valve close signal output. The third water level detector L3 is for output of an inflow solenoid valve opening signal, for detecting a reduced water level, and for return output for preventing pump idle operation due to a drought level, and the fourth water level detector L4 is for output for preventing pump idle operation due to a drought level. And Thereby, the water level control which conventionally required six water level detectors can be performed by the four water level detectors.
[0023]
FIG. 2 shows a second embodiment of the present invention. When the water level is lower than the third water level detector L3 and the state has continued for a preset time of a timed timer, it is determined that the water level is low, and a low water level warning is output. FIG. 4C shows this control flow.
[0024]
The flow in FIG. 4C shows an operation in which the timed timer starts when it is detected that the water level in the receiving tank is lower than the third water level detector L3. The solenoid valve opens immediately according to the flow shown in FIG. First, it is determined whether or not the water level in the receiving tank is lower than the third water level detector L3. If "YES", the timed timer is started and it is determined whether the timed out timer has expired. If the time-out timer has not expired, it is again determined whether or not the water level in the receiving tank is equal to or higher than the third water level detector L3. If "YES", the time-out timer is reset. That is, when the water level recovers to L3 or higher, it is determined that the water level is not in the low water level state, and no water reduction warning is output. If "NO", the count of the timed timer is continued. If the water level is less than L3 at the time of time-up, it is determined that the water level is in the low water level state, and a water reduction warning is output.
[0025]
When the water level is lower than the third water level detector L3 and the inflow solenoid valve opens and the water level gradually rises, it is generally necessary to output a water reduction alarm at the same time as the inflow solenoid valve opens for normal operation. There is no. In addition, there is also a case where chattering of a water reduction alarm is prevented when the water level is not constant due to, for example, undulation of the water surface near the third water level detector L3. For this reason, if the water level falls below the third water level detector L3 and rises above the third water level detector L3 within the set time of the preset timed timer, the water reduction warning is not output, and for some reason When the water level is lower than the third water level detector L3 continuously for the set time of the timed timer, the water reduction warning is output for the first time. As a result, when the water level rises normally, it is possible to prevent unnecessary warnings of water reduction from being output.
[0026]
FIG. 3 shows a third embodiment of the present invention. As a water level detector for detecting the water level of a water receiving tank provided on the suction side of the pump, three water level detectors S1, S2, and S3 having different detection water levels are provided. The water level is determined to be in the abnormally high water level state when it is equal to or higher than the first highest water level detector S1, and the water level is determined to be in the non-abnormally high water level state when it is lower than the first water level detector S1. When the water level is lower than the third highest water level detector S3, an open signal of the inflow solenoid valve is output, and when the water level returns to the second highest water level detector S2 or higher, the inflow solenoid valve is reset. When a closed signal is output and the water level is lower than the third water level detector S3 and the state continues for a set time of a preset timed timer, it is determined that the water level is low and an alarm is output, and at the same time, the pump is output. Outputs forced stop signal for idling prevention. When the water level returns to the second water level detector S2 or higher, it is determined that the water level is not low and the alarm is released, and at the same time, the forced stop signal for preventing the pump from running idle is released.
[0027]
FIG. 6 is a flowchart showing the third embodiment. As shown in FIG. 6A, when the water level in the receiving tank is equal to or higher than the first water level detector S1, it is determined that the water level is abnormally high, and a lamp indicating the abnormal water level is turned on.
[0028]
FIG. 6B shows an opening / closing flow of the city water inflow solenoid valve. It is determined whether the water level in the receiving tank is equal to or higher than the second water level detector S2. If "NO", it is determined whether or not the water level in the receiving tank is lower than the third water level detector S3. If “NO”, (1) the solenoid valve is closed when the water level has dropped from the second water level detector S2 or higher. (2) When the water level rises below the third water level S3, the solenoid valve is opened.
[0029]
FIG. 6C shows a control flow in a drought level state. This is an operation in which when the water level in the receiving tank reaches a level lower than the third water level detector S3, it is determined that the water level is low and the pump is stopped and an alarm is output to prevent the pump from running idle. First, it is determined whether or not the water level of the receiving tank is equal to or higher than the second water level detector S2, and then it is determined whether or not the water level of the receiving tank is lower than the third water level detector S3. When the water level falls from the second water level detector S2 or higher to a level lower than the third water level detector S3, the operation of the pump is stopped, and a drought warning is issued at the same time. Then, when the water level rises from a water level lower than the third water level detector S3 to a water level higher than the second water level detector S2, the pump automatically returns to its operation state, and the alarm is released.
[0030]
Also in this control flow, whether or not the water level has reached below the third water level detector S3 is determined by confirming whether or not the water level has recovered within a predetermined time by a timed timer. That is, if the water level in the receiving tank recovers to S3 or higher during the counting of the timed timer, the output of the drought warning and the stop of the pump are not performed. The timed timer counts up, and only when the water level in the receiving tank is lower than S3, the output of the drought warning and the pump stop are performed.
[0031]
As described above, the first water level detector S1 is used for detecting an abnormally high water level, and the second water level detector S2 is used for outputting an inflow solenoid valve closing signal and for outputting a pump idle operation prevention return based on a low water level. The third water level detector S3 is used to output an inflow solenoid valve open signal and to output a pump idle operation prevention (stop signal) based on a water shortage level. When the water level is lower than the third water level detector S3 and the inflow solenoid valve is opened and the water level gradually rises, the water shortage alarm and the pump idle operation are generally performed at the same time as the inflow solenoid valve is opened for normal operation. There is no need to output a forced stop signal for prevention. For this reason, when the water level falls below the third water level detector S3 and rises above the third water level within the preset time of the timed timer, a drought warning and a forced stop signal for preventing pump idle operation are output. If the water level is lower than the third water level continuously for more than the set time of the timed timer for some reason, a drought warning and a forced stop signal for preventing pump idle operation are output for the first time. As a result, when the water level rises normally, unnecessary drought warnings and forced stop signals for preventing pump idle operation are not output, and the water level control, which previously required five water level detectors, can be performed by the three water level detectors S1. , S2, and S3.
[0032]
【Example】
Next, an embodiment of the present invention will be described with reference to FIGS.
[0033]
FIG. 7 shows a first embodiment of the present invention. Reference numeral 33W denotes a liquid level relay. Relays x1 to x4 in the 33W are respectively connected between electrodes E1 to E5, between E2 to E5, between E3 to E5, and between E4 to E5, when there is conduction through water. The a contact is closed and the b contact is open. On the other hand, in the case where there is no water and there is no conduction, the contact a is opened and the contact b is closed.
[0034]
Reference numeral SW denotes a pump operation switch, 52 denotes a power circuit electromagnetic contactor, M denotes an electric motor, P denotes a pump, AV denotes a water level adjustment valve, and SV denotes a child valve of the water level adjustment valve. , LA1 to LA3 indicate lamps, Y1 to Y2 indicate auxiliary relays, and T indicates a timed timer.
[0035]
{Circle around (1)} When the water level in the water receiving tank becomes equal to or higher than the first water level L1, the contact a of the relay x1 between E1 and E5 is closed, and the abnormal water increase lamp LA1 is energized and turned on. When the water level becomes lower than the first water level L1, the contact a of the relay x1 is opened, and the abnormal water increase lamp LA1 is turned off.
[0036]
{Circle over (2)} When the water level in the water receiving tank is lower than the third water level L3, the contact b of the relay x3 between E3 and E5 is closed, and the timed timer T operates. If the water level becomes equal to or higher than the third water level L3 within the set time of the timed timer T, the contact b of the relay x3 is opened before the contact a of the timed timer T is closed, and the water reducing lamp LA2 is not turned on.
On the other hand, when the water level does not become equal to or higher than the third water level L3 within the set time of the timed timer T, the contact b of the relay x3 is closed, and the contact a of the timed timer T is closed, and the water reducing lamp LA2 is energized and turned on. Thereafter, when the water level becomes equal to or higher than the third water level L3, the contact b of the relay x3 is opened, the operation of the timed timer is stopped, and the water reduction lamp LA2 is turned off.
[0037]
{Circle around (3)} When the water level of the water receiving tank is less than L3, the b contact of the relay x3 between E3 and E5 is closed, and when the water level is less than L4, the b contact of the relay x4 between E4 and E5 is closed and the drought lamp LA3 Is turned on, the coil of the auxiliary relay Y1 is excited, and the contact a of the auxiliary relay Y1 is connected in parallel with the contact b of the relay x4 to form a self-holding circuit.
At the same time, the contact b of the auxiliary relay Y1 connected in series with the coil of the electromagnetic contactor 52 is opened, the coil of the electromagnetic contactor 52 is de-energized, and the contact of the electromagnetic contactor 52 of the power circuit is opened. The motor stops and performs the idling prevention operation.
[0038]
On the other hand, when the water level rises and becomes equal to or higher than the fourth water level L4, the b contact of the relay x4 opens, but the auxiliary relay Y1 and the lamp LA3 continue to be excited and lit by the self-holding a contact of the auxiliary relay Y1 connected in parallel. .
When the water level further rises and becomes equal to or higher than the third water level L3, the contact b of the relay x3 is opened, the auxiliary relay Y1 is de-energized and the lamp LA3 is turned off, and at the same time, the auxiliary relay connected in series with the coil of the electromagnetic contactor 52. The contact b of Y1 is closed, the coil of the electromagnetic contactor 52 is excited, the contact of the electromagnetic contactor 52 of the power circuit is closed, the operation is automatically restored, and the operation of the pump motor is restarted.
[0039]
{Circle around (4)} When the water level of the water receiving tank becomes lower than the second water level L2, the contact b of the relay x2 between E2 and E5 is closed, and when the water level becomes lower than the third water level L3, the relay x3 between E3 and E5 b The contact is closed, the city water inflow solenoid valve SV is energized and the solenoid valve is opened, the coil of the auxiliary relay Y2 is excited, and the a contact of the auxiliary relay Y2 is connected in parallel with the b contact of the relay x3 to form a self-holding circuit. . When the city water inflow solenoid valve SV is opened and water is supplied from the water level adjusting valve AV to the water receiving tank and the water level rises and becomes equal to or higher than the third water level L3, the contact b of the relay x3 opens, but the auxiliary relay Y2 connected in parallel , The auxiliary relay Y2 and the city water inflow solenoid valve SV continue to be opened by excitation and energization.
When the water level further rises and becomes equal to or higher than the second water level L2, the contact b of the relay x2 is opened, the auxiliary relay Y2 is de-energized, the city water inflow solenoid valve SV is closed by no power supply, and the water level adjustment valve AV is closed. .
[0040]
FIG. 8 shows a second embodiment of the present invention. Reference numeral 33W denotes a liquid level relay, and relays x1 to x3 in the 33W have a contact closed when the electrodes E1 to E4, E2 to E4, and E3 to E4 are electrically connected through water. , B contacts open. On the other hand, in the case where there is no water and there is no conduction, the contact a is opened and the contact b is closed.
[0041]
Reference numeral SW denotes a pump operation switch, 52 denotes a power circuit electromagnetic contactor, M denotes an electric motor, P denotes a pump, AV denotes a water level adjustment valve, and SV denotes a child valve of the water level adjustment valve. , LA1 and LA2 indicate lamps, Y1 indicates an auxiliary relay, and T indicates a timed timer.
[0042]
{Circle around (1)} When the water level in the water receiving tank becomes equal to or higher than the first water level S1, the a contact of the relay x1 between E1 and E4 is closed, and the abnormal water increase lamp LA1 is energized and turned on. When the water level becomes lower than S1, the a contact of the relay x1 is opened, and the abnormal water increase lamp LA1 is turned off.
[0043]
{Circle around (2)} When the water level in the water receiving tank becomes lower than the third water level (pump stop water level) S3, the contact b of the relay x3 between E3 and E4 is closed, and the timed timer T operates. If the water level becomes equal to or higher than the third water level S3 within the set time of the timed timer T, the b contact of the relay x3 is opened before the a contact T2 of the timed timer T is closed, and the drought lamp LA2 is not turned on.
On the other hand, if the water level does not become higher than the third water level S3 within the time set by the timed timer T, the b contacts of the relays x2 and x3 are closed, and the a contact T2 of the timed timer T is closed, and the drought lamp LA2 is energized and turned on. At the same time, the other contact a T1 of the timer T is connected in parallel with the contact b of the relay x3 to form a self-holding circuit.
[0044]
At the same time, the b contact of the timer T connected in series with the coil of the electromagnetic contactor 52 is opened, the coil of the electromagnetic contactor 52 is de-energized, and the contact of the electromagnetic contactor 52 of the power circuit is opened. Stop and perform idling prevention operation.
On the other hand, when the water level rises and becomes equal to or higher than the third water level S3, the b contact of the relay x3 is opened, but the timer T is excited by the self-holding a contact T1 of the timer T connected in parallel, and the timer T of the other timer T is connected. The lamp LA2 continues to be turned on by the a contact T2.
When the water level further rises and becomes equal to or higher than the second water level S2, the contact b of the relay x2 is opened, the timer T is de-energized and the lamp LA2 is turned off, and at the same time, the timer T is connected in series with the coil of the electromagnetic contactor 52. The contact b is closed, the coil of the electromagnetic contactor 52 is excited, the contact of the electromagnetic contactor 52 of the power circuit is closed, and the pump is automatically reset, and the pump motor is restarted.
[0045]
{Circle around (3)} When the water level in the water receiving tank falls below the second water level S2, the b contact of the relay x2 between E2 and E4 closes, and when the water level falls below the third water level S3, the b contact of the relay x3 between E3 and E4 closes. When closed, the city water inflow solenoid valve SV is energized to open the solenoid valve, and at the same time, the coil of the auxiliary relay Y1 is excited, and the contact a of the auxiliary relay Y1 is connected in parallel with the contact b of the relay x3 to form a self-holding circuit. The city water inflow solenoid valve SV opens and water is supplied to the water receiving tank from the water level adjustment valve AV. When the water level rises and becomes equal to or higher than the third water level, the contact b of the relay x3 opens, but the self-holding a contact of the auxiliary relay Y1 connected in parallel opens the auxiliary relay Y1 and the city water inflow solenoid valve SV by excitation and energization. Continue the state.
[0046]
When the water level further rises and becomes equal to or higher than the second water level S2, the contact b of the relay x2 is opened, the auxiliary relay Y1 is de-energized, the city water inflow solenoid valve SV is closed by no power supply, and the water level adjustment valve AV is closed, Inflow of city water stops.
[0047]
In the above embodiment, the water level detector is described as an electrode rod. However, the water level detector is not limited to the electrode rod. Needless to say, the same effect can be obtained with a water level detector such as a float switch. . Also, instead of using a plurality of devices corresponding to the water level to be detected, such as an electrode rod or a float switch, a single, for example, a water pressure gauge or the like is used, and the first, second, and third outputs are obtained from the analog output. Or the like may be detected. Further, in the present embodiment, an example in which the water in the water receiving tank is pressurized and sent has been described.However, in the case where the water stored in the water receiving tank is drained, it is needless to say that the gist of the present invention can be similarly applied. is there. Furthermore, although the example which used the opening and closing of the solenoid valve and the opening and closing of the water level adjustment valve for the water flowing into the water receiving tank was described, it is a matter of course that this may be performed by opening and closing the solenoid valve, or by using other opening and closing means. Of course, it is good.
[0048]
Further, the contact operation of the relays x1 to x4 and the like in the liquid level relay 33W and the operation such as opening of the city water inflow solenoid valve when energized are not limited to the operation of the present embodiment, and other operation characteristics It is needless to say that the same control can be performed with a considerable circuit configuration in the case of the above-mentioned circuit, and that other circuits are not limited to the circuit configuration of the present embodiment. Thus, various modifications can be made without departing from the spirit of the present invention.
[0049]
【The invention's effect】
As described above, according to the present invention, there are the following excellent effects.
As a water level detector of a water receiving tank provided on the suction side of the pump, a first water level detector is used for detecting an abnormal rising water level, a second water level detector is used for outputting an inflow solenoid valve closing signal, and a third water level detection is performed. The pump is used to output the inflow solenoid valve open signal, detect the low water level, and prevent the pump from running dry due to the low water level. The fourth water level detector is used for an output for preventing the pump from running due to a water shortage. As a result, the water level control which conventionally required six water level detectors can be performed by the four water level detectors.
[0050]
In addition, when the above-mentioned water level is lower than the third water level detector and the inflow solenoid valve of city water opens and the water level gradually rises, in general, at the moment when the inflow solenoid valve opens, it is generally necessary to operate normally. There is no need to output a low water warning. There is also the possibility of preventing chattering of the water reduction alarm when the water level is not constant due to the rising of the water surface near the third water level detector, etc., and the water level becomes equal to or lower than the third water level detector and within the set time of the preset timed timer If the water level rises above the third water level detector, no water reduction warning is output. If the water level is lower than the third water level detector continuously for more than the set time of the timed timer for some reason, the low water level warning is output for the first time, so that when the water level rises normally, the unnecessary low water level warning is not output. it can.
[0051]
In addition, the first water level detector is used for detecting an abnormally high water level, and the second water level detector is used for outputting an inflow solenoid valve closing signal and for outputting a pump empty operation prevention return based on a low water level. The third water level detector is used for outputting the inflow solenoid valve open signal and for preventing the pump from running idle due to the low water level. For the pump idle operation prevention output due to the drought level, the inflow solenoid valve opens when the water level is lower than the third water level detector, and when the water level gradually rises, the inflow solenoid valve generally opens for normal operation. It is not necessary to output a drought warning and a forced stop signal for preventing the pump from running at the same time. If the water level is lower than the third water level detector and the water level is lower than the third water level detector for more than the set time of the timed timer for some reason, a drought warning and a forced stop signal for pump empty operation prevention are output for the first time. . As a result, when the water level rises normally, unnecessary drought warnings and forced stop signals for preventing pump idle operation are not output. And the water level control which conventionally required five water level detectors can be performed by three water level detectors.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an operation control device according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram of an operation control device according to a second embodiment of the present invention.
FIG. 3 is an explanatory diagram of an operation control device according to a third embodiment of the present invention.
FIG. 4 is a control flowchart of the operation control device according to the first embodiment of the present invention.
FIG. 5 is a control flowchart of an operation control device according to a second embodiment of the present invention.
FIG. 6 is a control flowchart of an operation control device according to a third embodiment of the present invention.
FIG. 7 is a circuit diagram of an operation control device according to the first embodiment of the present invention.
FIG. 8 is a circuit diagram of an operation control device according to a second embodiment of the present invention.
FIG. 9 is an explanatory diagram of a conventional operation control device, showing an example in which four electrode rods are used.
FIG. 10 is an explanatory diagram of a conventional operation control device, showing an example in which five electrode rods are used.
FIG. 11 is an explanatory diagram of a conventional operation control device, showing an example in which six electrode rods are used.
FIG. 12 is an explanatory diagram of a conventional operation control device, showing an example in which seven electrode rods are used.
FIG. 13 is an explanatory view schematically showing a water supply facility.
[Explanation of symbols]
Reference Signs List 1 water receiving tank 2 pump 3 electrode rod 4 inflow solenoid valve 5 water level adjustment valve L1, L2, L3, L4 water level (detector)
S1, S2, S3, S4 Water level (detector)

Claims

In a water supply system that supplies water stored in a receiving tank with a pump,
The water receiving tank includes a plurality of water level detectors each having a different detected water level,
The first water level detector is used for detecting an abnormally high water level, the second water level detector is used for outputting a closing signal of an electromagnetic valve for controlling inflow of city water into the water receiving tank, and the third water level detector is used for the above. A water supply system for outputting an open signal of an electromagnetic valve and for outputting a pump idle operation prevention return, and a fourth water level detector for outputting a pump idle operation prevention according to a drought level.

The water supply system according to claim 1, wherein the pump idle operation prevention output is a forced stop signal of the pump.

3. The water supply system according to claim 1, wherein the third water level detector is also used for detecting a low water level as an advance warning of a pump stop due to the low water level. 4.

4. The water supply system according to claim 3, wherein the water level is detected when the water level in the water receiving tank is continuously lower than the third water level detector for a set time or more. 5.

In the operation control device of the water supply equipment that supplies the water stored in the water receiving tank with a pump,
When the water level is equal to or higher than the first water level of the water receiving tank, it is determined that the water level is abnormally increased. When the water level becomes the second water level lower than the first water level, the solenoid valve for controlling the inflow of city water into the water receiving tank is closed, and the water level is lower than the second water level. Controlling the solenoid valve to open when the water level is equal to or lower than a third water level, to stop the pump when the water level becomes equal to or lower than a fourth water level lower than the third water level, and to return the pump when the water level becomes equal to or higher than the third water level after stopping the pump. Operation control device for water supply equipment.

In a water supply system that supplies water stored in a receiving tank with a pump,
The water receiving tank includes a plurality of water level detectors each having a different detected water level,
The first water level detector is used for detecting an abnormally high water level, and the second water level detector is used for outputting a closed signal of an electromagnetic valve for controlling inflow of city water into the water receiving tank and for returning output for preventing pump empty operation, A water supply system wherein the third water level detector is used for outputting an open signal of the solenoid valve and for preventing the pump from running idle.

The forced stop signal of the pump is output as the pump idle operation prevention output when the water level of the water receiving tank is continuously lower than the third water level detector for a set time or more. Water supply equipment.

In the operation control device of the water supply equipment that supplies the water stored in the water receiving tank with a pump,
The opening and closing control of an electromagnetic valve for controlling the inflow of city water into the water receiving tank by a plurality of water level detectors each having a different detection water level provided in the water receiving tank, and the pump for preventing the pump from running idle due to drought of the water receiving tank. An operation control device for a water supply system, wherein a forced stop and automatic return of a pump are performed, and one of the plurality of water level detectors is used for outputting a close signal of the solenoid valve and for outputting a pump idle operation prevention return. .

In the operation control device of the water supply equipment that supplies the water stored in the water receiving tank with a pump,
The opening and closing control of an electromagnetic valve for controlling the inflow of city water into the water receiving tank by a plurality of water level detectors each having a different detection water level provided in the water receiving tank, and the pump for preventing the pump from running idle due to drought of the water receiving tank. Perform a forced stop and automatic return of the pump, one of the plurality of water level detectors for the output of the solenoid valve closing signal output and pump idle operation prevention return output, another of the plurality of water level detectors An operation control device for a water supply facility, wherein one is for outputting an open signal of the solenoid valve and for outputting a pump idle operation prevention.