JP4674929B2

JP4674929B2 - Pressure sewer system

Info

Publication number: JP4674929B2
Application number: JP31489899A
Authority: JP
Inventors: 暁富永; 寛二石田
Original assignee: 旭テック環境ソリューション株式会社
Priority date: 1999-11-05
Filing date: 1999-11-05
Publication date: 2011-04-20
Anticipated expiration: 2019-11-05
Also published as: JP2001132084A

Description

【０００１】
【発明の属する技術分野】
本発明は、各汚水槽内の汚水をポンプにより樹枝状配管を構成する本管を経て圧送する圧力式下水道システムに関する。
【０００２】
【従来の技術】
一般的に、圧力式下水道システムは、汚水槽に設置されたポンプを制御してそのボンプにより汚水槽内の汚水を枝管に排出し、その枝管から本管により圧送するように構成されている。
【０００３】
上記本管の容量は、その本管に汚水排出量が集中する排出ラッシュ時間帯であっても無理なく圧送できるように設定されている。例えば、本管に対して５個のポンプが接続されている場合、本管に接続されている全てのポンプが同時に汚水を排出したときに対処できるようにすると、本管の口径が大きくなって設備コストがかさむので、上述の排出ラッシュ時間帯の汚水排出量が、例えば、３台のポンプが同時に稼動したときの汚水排出量に相当するとき、本管の容量は、その３台のポンプが同時に稼動しても無理なく圧送できるように設定されている。
【０００４】
また、上述のように、本管の容量に対して同時に稼動可能なポンプの台数(以下、これを許容稼動台数という。)が決められている場合は、許容稼動台数を超えるポンプからの汚水排出要求があったときは、現在稼動中のポンプが稼動を停止するまで、汚水排出要求をしたポンプに待機させたり、あるいは、許容稼動台数の中で稼動するポンプを強制的に指定する制御を行っている。
【０００５】
したがって、上述の許容稼動台数制御により、許容稼動台数を超える数のポンプが同時に稼動されて本管内の圧力損失が増大するのを防止でき、また、ポンプを駆動するモータに過負荷が生じるのを防止することができる。さらに、ポンプが駆動しても汚水を排出できないという不都合を防止することができる。
【０００６】
【発明が解決しようとする課題】
しかしながら、上記従来の圧力式下水道システムにおいては、本管の容量に対する許容稼動台数を超える数のポンプが同時に稼動されないように構成されているが、その非稼動中のポンプの設置されている汚水槽へは、非稼動中であっても汚水が流入するので、その汚水槽が満杯になるおそれがあった。
【０００７】
そこで、本発明は、上記欠点を解決するためになされたものであって、その目的は、本管の容量に対する許容稼動台数を超える数のポンプが同時に稼動されないように構成されている圧力式下水道システムにおいて、非稼動中のポンプが設置されている汚水槽が満杯になることを防止することができる圧力式下水道システムを提供することにある。
【０００８】
【課題を解決するための手段】
本発明は、上記目的を達成するために、各汚水槽内の汚水をポンプにより樹枝状配管を構成する枝管と本管を経て圧送する圧力式下水道システムであって、前記本管の容量に対して同時に稼動可能なポンプの台数である許容稼動台数が設定されているものにおいて、（ａ）各汚水槽に、前記ポンプと、水位測定手段と、制御部と、通信制御部とからなるポンプユニットを設け、（ｂ）前記水位測定手段は、前記汚水槽内の水位を測定し、前記ポンプの汚水排出により汚水槽内の水位が汚水槽の底付近に下がって、そのポンプの稼動を停止させるべき所定の水位であるポンプＯＦＦ水位、汚水流入により汚水槽内の水位が所定の高さとなってポンプによる汚水排出を開始させるべき所定の水位であるポンプＯＮ水位、汚水槽内の水位が汚水槽内の満水付近の所定の水位である満水前水位及び汚水槽の満水を示す所定の水位である満水水位をそれぞれ示す信号を前記制御部に出力するものであり、（ｃ）前記制御部のうち、一つのポンプユニットの制御部は親機として、他のポンプユニットの制御部は子機としてそれぞれ機能するものであり、（ｃ１）前記親機は、自身のポンプユニットと他のポンプユニットの水位測定手段からの水位を示す信号を監視するとともに、各ポンプユニットのポンプが稼動中か、非稼動中かを示す信号を受信して、（ｃ１１）前記許容稼動台数のポンプが同時に稼動中に、非稼動中のポンプに係る汚水槽の水位測定手段から満水前水位以上を示す信号を入力したときは、現在稼動中のポンプに係る汚水槽の水位測定手段からポンプＯＮ水位未満を示す信号を入力したときに、その汚水槽の稼動中のポンプを停止させるとともに、前記満水前水位以上を示す信号を出力した汚水槽の非稼動中のポンプの稼動を開始させる制御信号を当該ポンプを制御するポンプユニットに出力し、（ｃ１２）非稼動中のポンプに係る汚水槽の水位測定手段から満水水位を示す信号を入力したときは、稼動中のポンプに係る汚水槽の水位測定手段から満水前水位未満を示す信号を入力したとき、その稼動中のポンプを停止させるとともに、前記満水水位の汚水槽の非稼動中のポンプの稼動を開始させる制御信号を出力するものであり、（ｃ２）前記子機は、自身のポンプユニットの水位測定手段の水位を示す信号及びポンプの稼動中又は非稼動中を示す信号を前記親機に送信するとともに、前記親機からの制御信号を受信してポンプを制御するものであることを特徴としている。
また、本発明は、上記目的を達成するために、上記圧力式下水道システムおいて、（ａ）各汚水槽に、前記ポンプと、水位測定手段と、排出時間測定手段と、制御部と、通信制御部とからなるポンプユニットを設け、（ｂ１）前記水位測定手段は、前記汚水槽内の水位を測定し、前記ポンプの汚水排出により汚水槽内の水位が汚水槽の底付近に下がって、そのポンプの稼動を停止させるべき所定の水位であるポンプＯＦＦ水位、汚水流入により汚水槽内の水位が所定の高さとなってポンプによる汚水排出を開始させるべき所定の水位であるポンプＯＮ水位、汚水槽内の水位が汚水槽内の満水付近の所定の水位である満水前水位及び汚水槽の満水を示す所定の水位である満水水位をそれぞれ示す信号を前記制御部に出力するものであり、（ｂ２）前記排出時間測定手段は、稼動したポンプによる汚水排出時間を測定して、その測定値を示す信号を前記制御部に出力するものであり、（ｃ）前記制御部のうち、一つのポンプユニットの制御部は親機として、他のポンプユニットの制御部は子機としてそれぞれ機能するものであり、（ｃ１）前記親機は、自身のポンプユニットと他のポンプユニットの水位測定手段からの水位を示す信号及び排出時間測定手段からの測定値を示す信号を監視するとともに、各ポンプユニットのポンプが稼動中か、非稼動中かを示す信号を受信して、（ｃ１１）前記許容稼動台数のポンプが同時に稼動中に、非稼動中のポンプに係る汚水槽の水位測定手段から満水前水位以上を示す信号を入力したときは、現在稼動中のポンプのうち、運転開始後の汚水の排出時間が短いポンプの稼動を継続させ、かつ、運転開始後の汚水の排出時間が長いポンプを停止させるとともに、前記満水前水位以上を示す信号を出力した汚水槽の非稼動中のポンプの稼動を開始させる制御信号を当該ポンプを制御するポンプユニットに出力し、（ｃ１２）非稼動中のポンプに係る汚水槽の水位測定手段から満水水位を示す信号を入力したときは、現在稼動中のポンプのうち、運転開始後の汚水の排出時間が短いポンプの稼動を継続させ、かつ、運転開始後の汚水の排出時間が長いポンプを停止させるとともに、前記満水水位の汚水槽の非稼動中のポンプの稼動を開始させる制御信号を出力するものであり、（ｃ２）前記子機は、自身のポンプユニットの水位測定手段の水位を示す信号、排出時間測定手段の排出時間を示す信号及びポンプの稼動中又は非稼動中を示す信号を前記親機に送信するとともに、前記親機からの制御信号を受信してポンプを制御するものであることを特徴としている。
さらに、本発明は、上記目的を達成するために、上記圧力式下水道システムにおいて、（ａ）各汚水槽に、前記ポンプと、水位測定手段と、排出量測定手段と、制御部と、通信制御部とからなるポンプユニットを設け、（ｂ１）前記水位測定手段は、前記汚水槽内の水位を測定し、前記ポンプの汚水排出により汚水槽内の水位が汚水槽の底付近に下がって、そのポンプの稼動を停止させるべき所定の水位であるポンプＯＦＦ水位、汚水流入により汚水槽内の水位が所定の高さとなってポンプによる汚水排出を開始させるべき所定の水位であるポンプＯＮ水位、汚水槽内の水位が汚水槽内の満水付近の所定の水位である満水前水位及び汚水槽の満水を示す所定の水位である満水水位をそれぞれ示す信号を前記制御部に出力するものであり、（ｂ２）前記排出量測定手段は、稼動したポンプによる汚水排出量を測定して、その測定値を示す信号を前記制御部に出力するものであり、（ｃ）前記制御部のうち、一つのポンプユニットの制御部は親機として、他のポンプユニットの制御部は子機としてそれぞれ機能するものであり、（ｃ１）前記親機は、自身のポンプユニットと他のポンプユニットの水位測定手段からの水位を示す信号及び排出量測定手段からの測定値を示す信号を監視するとともに、各ポンプユニットのポンプが稼動中か、非稼動中かを示す信号を受信して、（ｃ１１）前記許容稼動台数のポンプが同時に稼動中に、非稼動中のポンプに係る汚水槽の水位測定手段から満水前水位以上を示す信号を入力したときは、現在稼動中のポンプのうち、運転開始後の汚水の排出量が少ないポンプの稼動を継続させ、かつ、運転開始後の排出量が多いポンプを停止させるとともに、前記満水前水位以上を示す信号を出力した汚水槽の非稼動中のポンプの稼動を開始させる制御信号を当該ポンプを制御するポンプユニットに出力し、（ｃ１２）非稼動中のポンプに係る汚水槽の水位測定手段から満水水位を示す信号を入力したときは、現在稼動中のポンプのうち、運転開始後の汚水の排出量が少ないポンプの稼動を継続させ、かつ、運転開始後の汚水の排出量が多いポンプを停止させるとともに、前記満水水位の汚水槽の非稼動中のポンプの稼動を開始させる制御信号を出力するものであり、（ｃ２）前記子機は、自身のポンプユニットの水位測定手段の水位を示す信号、排出量測定手段の排出量を示す信号及びポンプの稼動中又は非稼動中を示す信号を前記親機に送信するとともに、前記親機からの制御信号を受信してポンプを制御するものであることを特徴としている。
【０００９】
上記親機は、非稼動中のポンプに係る汚水槽の水位が満水水位となったときにおいて、現在稼動中の許容可動台数のポンプに係る汚水槽の汚水の水位がいずれも満水前水位以上となっているときは、汚水を排出している各家庭等に対して警報を発するものであることが望ましい。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図１は、一実施の形態に係る圧力式下水道システムの概略構成図である。図１において、１０は図外の圧送先まで通じる本管であり、１０´はその本管に接続されている枝管であって、これらの本管１０と枝管１０´により樹枝状配管が構成されている。そして、各枝管１０´の先端は、各家庭等の汚水発生源から排出される汚水を受入れる所定の容量を有する汚水槽１に接続されており、その汚水槽１に、槽内の汚水をポンプにより枝管１０´を介して本管１０により排出するためのポンプユニットａ１〜ａ５が設置されている。
【００１１】
いずれの汚水槽１に設置されるポンプユニットも、基本的に同一の構成を有するので、図１には、図面の簡明化のため、一つのポンプユニットａ１のみの詳細を示し、他のポンプユニットａ２〜ａ５の詳細は省略してある。
【００１２】
ポンプユニットａ1 は、ポンプＰと、水位測定手段としての水位計２と、制御部３と、通信制御部４とから構成されている。
ポンプＰは、グラインダポンプであるが、その他のポンプであってもよい。汚水槽１内の汚水を枝管１０´を介して本管１０により排出するためのものである。水位計２は、汚水槽１内の汚水の水位を測定するためのものである。この水位計には、隔膜式，電極式，超音波式等の周知の各種水位計を用いることができる。
【００１３】
水位計２は、汚水槽１内の水位を測定するものであって、ポンプＰの汚水排出により汚水槽１内の水位が汚水槽１の底付近まで下がったときの、ポンプＰの稼動を停止させるべき所定の水位（以下、「ポンプＯＦＦ水位」という）Ｌ、汚水流入により汚水槽１内の水位が所定の高さまで上がったときの、ポンプＰによる汚水排出を開始させるべき所定の水位（以下、「ポンプＯＮ水位」という）Ｈ、汚水槽１内の水位がさらに上がった汚水槽１内の満水付近の所定の水位（以下、「満水前水位」という）２Ｈ（ＨＨ）、及び汚水槽１の満水時の所定の水位（以下、「満水水位」という）３Ｈ（ＨＨＨ）を示す信号を制御部３に出力するように構成されている。
【００１４】
制御部３は、ＣＰＵを中心に構成されていて、水位計２から入力した信号及び通信制御部４を介して他のポンプユニットａ2〜ａ5から入力した情報を基に演算処理して、ポンプＰの稼動を後述のごとく制御するように構成されている。
通信制御部４は、ＲＳ２３２Ｃ等を用いる周知のものであり、公衆回線網又は専用回線等の通信回線５を介して通信ネットワーク（ＬＡＮ）を構成している。この通信ネットワークにおいて、ポンプユニットａ1 の制御部３は、親機の機能を果し、他のポンプユニットａ2 〜ａ5 の制御部３，３…が子機となるように接続されている。もちろん、ポンプユニットａ1 〜ａ5 のうちのいずれのポンプユニットの制御部を親機とするかは、任意である。また、親機としての制御部３は、通信回線５を介して汚水を排出している家庭等の所定の箇所に対して汚水排出禁止の通報ができるように構成されている。
【００１５】
本管１０には、各ポンプユニットａ1 〜ａ5 のポンプＰから枝管１０′，１０′…を介して汚水が排出されるが、上述したように、本管１０の容量は、同時に稼動可能な台数（許容稼動台数）のポンプの総吐出量を圧送できるように設定されている。
【００１６】
以下、図２のフローチャートを用いて制御動作について説明する。説明を簡単にするために、樹枝状配管に接続されている汚水槽１の数、従って、ポンプユニットの数は５個で、許容稼動台数は３個である場合を想定して説明する。
圧力式下水道システムが運転されている間は、ポンプユニットａ2 〜ａ5 の各制御部から当該ポンプユニットの水位計２の水位を示す信号とポンプＰが稼動中か、非稼動中かの信号が、通信回線５を介してポンプユニットａ１の親機として機能する制御部３に入力する。
【００１７】
ポンプユニットａ１の制御部３は、稼動中のポンプＰの台数が１台又は２台のときは（ステップ１００否定。以下、ステップを「Ｓ」とする。）、本管１０の容量に十分に余裕があるので、特別な制御を行わず、リターンに移行する。
【００１８】
これに対して、同時に稼動中のポンプＰの台数が３台の(すなわち、許容稼動台数と等しい)ときは（Ｓ１００肯定）、ポンプユニットａ１の制御部３は、非稼動中のポンプＰが設置されている汚水槽１内の汚水の水位によって、すなわち、当該水位計からの信号に基づいて、以下のような演算制御を行なう。
【００１９】
すなわち、ポンプユニットａ１の制御部３は、ポンプＰが３台同時に稼動中に、非稼動中のポンプＰに係る汚水槽１の水位計２からの信号によりその汚水槽１の汚水の水位が満水前水位２Ｈ以上になったものがないと判断した場合は（Ｓ１０２否定）、現在稼動中の３台のポンプＰによる汚水排出を続行させる制御信号を、通信回線５を介して当該ポンプユニットの制御部３に与えるが、前記非稼動中のポンプＰに係る汚水槽１の汚水の水位が満水前水位２Ｈ以上になったものがあると判断したときは（Ｓ１０２肯定）、現在稼動中のいずれかのポンプＰによる汚水排出を停止させて、その満水前水位２Ｈ以上となった汚水槽１の汚水の排出を優先させる（Ｓ１０４）。
【００２０】
この優先排出は、現在稼動中のポンプＰに係る汚水槽１の水位計２からの信号によりその汚水の水位がポンプＯＮ水位Ｈ未満のものがあると判断したとき、その汚水槽１のポンプＰを停止させ（Ｓ１０６肯定、Ｓ１０８）、かつ、満水前水位２Ｈに達した汚水槽１のポンプＰの稼動を開始させる制御信号を当該非稼動中のポンプＰを制御するポンプユニットに出力することにより行なう（Ｓ１１０）。
【００２１】
非稼動中のポンプＰに係る汚水槽１の水位計２からの信号により汚水の水位が満水水位３Ｈになったものがあると判断した場合（Ｓ１０４否定）は、その汚水槽１に汚水受入れの余裕がないので、その汚水槽からの排出が最優先される。すなわち、稼動中のポンプＰに係る汚水槽１の水位計２からの信号により満水前水位２Ｈ未満であると判断したときは、ポンプユニットａ１の制御部３は、その汚水槽１のポンプＰを停止させる制御信号を出力するとともに、満水水位３Ｈになった汚水槽１のポンプＰの稼動を開始させる制御信号を出力する（Ｓ１１２肯定、Ｓ１１４、Ｓ１１６）。
【００２２】
しかし、非稼動中のポンプＰに係る汚水槽１の汚水の水位が満水水位３Ｈとなっているときにおいて、現在稼動中の３台（許容可動台数）のポンプＰに係る汚水槽１の汚水の水位がいずれも満水前水位２Ｈ以上となることは（Ｓ１１２否定）、圧力式下水道システム全体として処理できない量の汚水が集中して発生している異常事態である。通常は、このような異常事態が発生しないように、本管の容量と許容可動台数が設定されているのであるが、万一、このような異常事態が発生したときは、ポンプユニットａ1 の制御部３は、汚水を排出している各家庭等に対して汚水の排出を行わないようにとの警報を発する（Ｓ１１８）ことが望ましい。
【００２３】
上述のように、親機は、各汚水槽の汚水の水位を常時監視し、許容稼動台数のポンプの稼動中に非稼動中のポンプに係る汚水槽のポンプユニットから汚水排出の要求があった場合は、同時に稼動されるポンプの台数が許容稼動台数を超えない範囲で、各汚水槽の汚水の水位の高低によって、稼動中のいずれかのポンプの稼動を止め、非稼動中の汚水排出の要求をしたポンプを優先的に稼動させる演算制御を行なうので、汚水槽が満杯になるのを効果的に防止することができる。
【００２４】
なお、上述の例では、本管１０に５個のポンプユニットａ1 〜ａ5 が接続されている例を示したが、本管１０に接続されるポンプユニットの数は任意である。
また、上述の例では、各ポンプユニットａ1 〜ａ5 は、許容稼動台数のポンプが同時に稼動中に、非稼動中のポンプに係る汚水槽１の汚水の水位が満水前水位以上になった場合は稼動中のポンプに係る汚水槽の汚水の水位がポンプＯＮ水位未満になったときに、又は非稼動中のポンプのうち汚水槽の汚水の水位が満水水位になった場合は稼動中のポンプに係る汚水槽の汚水の水位が満水前水位未満になったときに、すなわち、汚水槽の汚水水位によって、その稼動中のポンプを停止して、満水前水位以上になった汚水槽の非稼動中のポンプを優先的に稼動させるようにしたが、制御部による各ポンプの制御を、上述された汚水槽の汚水水位監視による制御に代えて、排出時間監視による制御、あるいは、排出量監視による制御を行うこともできる。
すなわち、排出時間監視による制御においては、非稼動中のポンプに係る汚水槽の汚水の水位が満水前水位以上になった場合は、同時に稼動中の許容稼動台数のポンプのうち、運転開始後の汚水の排出時間の短いポンプの稼動を続行し、運転開始後の汚水の排出時間の長いポンプを停止して、満水前水位以上になった汚水槽の非稼動中のポンプを優先的に稼動させるように制御する。つまり、運転開始後の汚水の排出時間の短いポンプを、優先的に稼動させる。また、排出量監視による制御においては、非稼動中のポンプに係る汚水槽の汚水の水位が満水前水位以上になった場合は、同時に稼動中の許容稼動台数のポンプのうち、運転開始後の汚水の排出量の少ないポンプの稼動を続行し、汚水排出開始からの排出量の多いポンプを停止して、満水前水位以上になった汚水槽の非稼動中のポンプを優先的に稼動させるように制御する。つまり、運転開始後の汚水の排出量の少ないポンプを、優先的に稼動させる。
【００２５】
【発明の効果】
本発明によれば、本管の容量に対する許容稼動台数を超える数のポンプが同時に稼動されないように構成されている圧力式下水道システムにおいて、非稼動中のポンプが設置されている汚水槽が満杯になることを効果的に防止することができる。
【図面の簡単な説明】
【図１】本発明の一実施の形態に係る圧力式下水道システムの概略構成図である。
【図２】制御動作を示すフローチャートである。
【符号の説明】
ａ1 〜ａ5 ポンプユニット
１汚水槽
２水位測定手段（水位計）
３制御部
４通信制御部
５通信回線
Ｐポンプ（グラインダポンプ）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pressure sewer system that pumps sewage in each sewage tank through a main pipe constituting a dendritic pipe by a pump.
[0002]
[Prior art]
Generally, pressure sewer system controls the installed pump holding tank discharges the sewage fouling in the water tank by the ordinary man in the branch pipe, constructed so that to pumping by the main pipe from the branch pipe Has been.
[0003]
Capacity of the main pipe is set to cut the feed pressure without difficulty be discharged rush hours the amount of wastewater discharged is concentrated in the main pipe. For example, if the five pump against mains are connected and to be able to deal with when all pumps are connected to the main pipe was discharged wastewater simultaneously, the diameter of the main pipe is greater since the sounding equipment costly, when sewage emissions of exhaust rush hours described above, for example, which corresponds to the sewage discharge amount when the three pump has been running at the same time, the capacity of the main, three the pump of is set to cut the feed pressure without unreasonable be稼dynamic at the same time.
[0004]
Further, as described above, simultaneously workable pump number with respect to the capacity of the main pipe if is determined (hereinafter. Referred allowable operating volume this), the allowable operation number ultrasonic Erupon flop or al when there is a left of fouling Mizuhai request, to pump the currently running stops the operation, and have it wait pumps sewage discharge requirements, or Pont to 稼 dynamic in allowable working volume is carried out forcibly control to specify the flop.
[0005]
Therefore, the allowable operation number control described above, the allowable operation number number of pump more than can be prevented from increasing the pressure loss of production has been the tube at the same time, also, the overload is generated in the motor driving the pump Can be prevented. Furthermore, it is possible to prevent the disadvantage that the sewage cannot be discharged even when the pump is driven.
[0006]
[Problems to be solved by the invention]
However, the above conventional pressure sewer system, although the allowable operation number to volume mains pump ultra El number is configured not to operate simultaneously, are installed in the pump of the non-operation Since sewage flows into the sewage tank even when it is not in operation, the sewage tank may become full.
[0007]
Accordingly, the present invention has been made to solve the above-mentioned drawbacks, and the purpose thereof is a pressure-type sewer that is configured so that a number of pumps that exceed the allowable number of operation for the capacity of the main pipe are not operated simultaneously. It is an object of the present invention to provide a pressure sewer system that can prevent a sewage tank in which a non-operating pump is installed from becoming full .
[0008]
[Means for Solving the Problems]
This onset Ming, in order to achieve the above object, a pressure sewer system for pumping through a branch pipe and a main pipe which constitutes the dendritic pipes by sewage pumps in each sewage tank, the capacity of the main in what is set allowable operation number is the number of the operable pump simultaneously to, (a) to each sewage tank consists of said pump, a water level measuring device, and a control unit, a communication control unit A pump unit is provided, and (b) the water level measuring means measures the water level in the sewage tank, and the water level in the sewage tank is lowered to the vicinity of the bottom of the sewage tank by discharging the sewage from the pump, and the pump is operated. The pump-off water level, which is the predetermined water level to be stopped, the water level in the sewage tank becomes a predetermined height due to the inflow of sewage, the pump-on water level, which is the predetermined water level to be started to discharge the sewage by the pump, and the water level in the sewage tank are Inside the septic tank A signal indicating a full water level that is a predetermined water level that indicates a pre-full water level that is a predetermined water level near the full water level and a predetermined water level that indicates a full water level in a sewage tank, and (c) of the control unit, The control unit of one pump unit functions as a master unit, and the control unit of another pump unit functions as a slave unit. (C1) The master unit measures the water level of its own pump unit and other pump units. The signal indicating the water level from the means is monitored, and a signal indicating whether the pump of each pump unit is operating or not operating is received. (C11) When the allowable number of operating pumps are operating simultaneously, When a signal indicating the pre-full water level or higher is input from the water level measuring means of the sewage tank related to the operating pump, a signal indicating that the pump level is less than the pump ON water level from the water level measuring means of the sewage tank related to the currently operating pump. When input, the pump that is operating in the sewage tank is stopped, and the pump is controlled with a control signal that starts the operation of the non-operating pump in the sewage tank that outputs a signal indicating the level before the full water level. (C12) When a signal indicating the full water level is input from the water level measuring means of the sewage tank related to the non-operating pump, the pre-full water level is output from the water level measuring means of the sewage tank related to the operating pump. When a signal indicating less than is input, the operating pump is stopped, and a control signal for starting the operation of the non-operating pump of the sewage tank at the full water level is output. (C2) The machine transmits a signal indicating the water level of the water level measuring means of its own pump unit and a signal indicating whether the pump is operating or not operating to the parent machine, and a control signal from the parent machine. It is characterized in that to control the pump and signal.
In order to achieve the above object, the present invention provides the above-mentioned pressure sewer system, wherein (a) each sewage tank includes the pump, a water level measuring unit, a discharge time measuring unit, a control unit, and a communication unit. (B1) The water level measuring means measures the water level in the sewage tank, and the water level in the sewage tank is lowered near the bottom of the sewage tank by discharging the sewage from the pump, Pump OFF water level that is a predetermined water level that should stop the operation of the pump, pump ON water level that is a predetermined water level that should start drainage of sewage by the pump when the water level in the sewage tank becomes a predetermined height due to inflow of sewage, sewage The water level in the tank is a predetermined water level in the vicinity of the full water in the sewage tank, and a signal indicating the full water level that is a predetermined water level indicating the full water level in the sewage tank is output to the control unit. b2 The discharge time measuring means measures the sewage discharge time by an activated pump and outputs a signal indicating the measured value to the control unit. (C) Among the control units, one pump unit The control unit functions as a master unit, and the control units of other pump units function as slave units. (C1) The master unit determines the water level from the water level measuring means of its own pump unit and other pump units. And a signal indicating whether the pump of each pump unit is in operation or not in operation, and (c11) the allowable number of pumps When a signal indicating the pre-full water level or higher is input from the water level measurement means of the sewage tank associated with the pump that is not in operation, while the Continue to operate the pump with a short time, stop the pump with a long discharge time of sewage after the start of operation, and operate the pump while the sewage tank is not in operation that outputs a signal indicating the water level before full water. When the control signal to be started is output to the pump unit that controls the pump, and (c12) the signal indicating the full water level is input from the water level measuring means of the sewage tank related to the non-operating pump, Among them, the pump with a short sewage discharge time after the start of operation is continued and the pump with a long sewage discharge time after the start of operation is stopped, and the sewage tank with the full water level is not operated. (C2) The slave unit outputs a signal indicating the water level of the water level measuring means of its own pump unit and a signal indicating the discharge time of the discharge time measuring means. And a signal indicating that the pump is operating or not operating is transmitted to the master unit, and a control signal from the master unit is received to control the pump.
Furthermore, in order to achieve the above object, the present invention provides the above-mentioned pressure sewer system, wherein (a) each sewage tank includes the pump, a water level measuring unit, a discharge measuring unit, a control unit, and a communication control unit. (B1) the water level measuring means measures the water level in the sewage tank, and the water level in the sewage tank is lowered near the bottom of the sewage tank by discharging the sewage from the pump. Pump OFF water level, which is the predetermined water level that should stop the pump operation, pump ON water level, sewage tank, where the water level in the sewage tank becomes a predetermined height due to inflow of sewage and the sewage discharge by the pump should be started And a signal indicating the full water level, which is a predetermined water level indicating the full water level in the sewage tank, and a pre-full water level that is a predetermined water level in the vicinity of the full water in the sewage tank, and (b) ) The discharge measuring means measures the amount of sewage discharged by the operated pump and outputs a signal indicating the measured value to the control unit. (C) One pump unit of the control units And the control unit of the other pump unit functions as a slave unit, respectively. (C1) The master unit includes the water level from the water level measuring means of its own pump unit and other pump units. And a signal indicating whether the pump of each pump unit is operating or not operating, and (c11) the number of the allowable operating number When a signal indicating the pre-full water level or higher is input from the water level measuring means of the sewage tank associated with the pump that is not in operation while the pump is operating at the same time, the amount of sewage discharged after the start of operation among the pumps that are currently in operation A control signal for starting the operation of a non-operating sewage tank that continues operation of a small number of pumps and stops a pump that discharges a large amount after the start of operation and outputs a signal indicating the water level before the full water level. Is output to the pump unit that controls the pump, and (c12) when a signal indicating the full water level is input from the water level measuring means of the sewage tank related to the non-operating pump, the operation is started among the currently operating pumps. Continue to operate the pump with a small amount of discharged sewage later, stop the pump with a large amount of discharged sewage after the start of operation, and start operating the pump when the sewage tank at the full water level is not in operation (C2) The slave unit outputs a signal indicating the water level of the water level measuring means of its own pump unit, a signal indicating the discharge amount of the discharge amount measuring means, and the operation of the pump. A signal indicating medium or non-operating is transmitted to the master unit, and a control signal from the master unit is received to control the pump.
[0009]
When the water level of the sewage tank related to the non-operating pump reaches the full water level, the sewage water level of the sewage tank related to the allowable number of movable pumps currently in operation is higher than the pre-full water level. When it is, it is desirable to issue a warning to each household that discharges sewage.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a pressure sewer system according to an embodiment. In FIG. 1, 10 is a main pipe that leads to a pumping destination outside the figure, 10 'is a branch pipe connected to the main pipe, and the main pipe 10 and the branch pipe 10' form a dendritic pipe. It is configured. And the front-end | tip of each branch pipe 10 'is connected to the sewage tank 1 which has the predetermined capacity | capacitance which receives the sewage discharged | emitted from the sewage generation source of each household etc., and the sewage in a tank is put into the sewage tank 1 Pump units a <b> 1 to a <b> 5 for discharging by the main pipe 10 through the branch pipe 10 ′ are installed by a pump.
[0011]
Since the pump units installed in any of the sewage tanks 1 have basically the same configuration, FIG. 1 shows details of only one pump unit a1 for simplification of the drawings, and shows other pump units. Details of a2 to a5 are omitted.
[0012]
The pump unit a1 includes a pump P, a water level meter 2 as a water level measuring means, a control unit 3, and a communication control unit 4.
The pump P is a grinder pump, but may be other pumps. Ru der intended for discharging the main pipe 10 via the branch pipe 10 'the sewage holding tank 1. The water level meter 2 is for measuring the level of sewage in the sewage tank 1 . The water level gauge can be used diaphragm type, electrode type, various known water level gauge, such as ultrasonic.
[0013]
Water gauge 2, fouling the water level in the water tank 1 be one measure, when the water level holding tank 1 drops to near the bottom of the holding tank 1 by fouling Mizuhai unloading of pump P, pump P predetermined water level to stop the operation (hereinafter, "pump OFF level" hereinafter) L, when the water level holding tank 1 has risen to a predetermined height by sewage inflow, the fouling Mizuhai unloading by pump P starts A predetermined water level (hereinafter referred to as “pump-on water level”) H to be caused, a predetermined water level in the vicinity of the full water in the sewage tank 1 where the water level in the sewage tank 1 is further increased (hereinafter referred to as “water level before full water”) 2H ( HH) and a signal indicating a predetermined water level (hereinafter referred to as “full water level”) 3H (HHH) when the sewage tank 1 is full are configured to be output to the control unit 3.
[0014]
Control unit 3 is built around a CPU, and processing based on information input from other pump unit a2~a5 via the signal and communication control unit 4 which is inputted from the water level indicator 2, the operation of the pump P is configured to control as will be described later.
The communication control unit 4 is a well-known one using RS232C or the like, and constitutes a communication network (LAN) via a communication line 5 such as a public line network or a dedicated line. In this communication network, the control unit 3 of the pump unit a1 plays a function of the master unit, the control unit of the other pump unit a2 to A5 3,3 ... are connected in a slave unit. Of course, either the control unit of Izu Re pump unit of the pump unit a 1 to A5 and the master unit is optional. In addition, the control unit 3 as a parent device is configured to be able to report sewage discharge prohibition to a predetermined location such as a home that discharges sewage via the communication line 5.
[0015]
The main 10, branch 10 from the pump P of the pump units a1 ~a5 ', 10' ... but sewage Ru is discharged via, as described above, the capacity of the tube 10, simultaneously can operate It is set so that the total discharge amount of a large number of pumps (allowable operating number) can be pumped .
[0016]
The control operation will be described below using the flowchart of FIG. In order to simplify the explanation, it is assumed that the number of sewage tanks 1 connected to the dendritic pipe, that is, the number of pump units is 5, and the allowable number of operating units is 3.
While pressure sewer system is operating, the pump unit a2 signal and pump P that indicates the water level gauge 2 water level of the pump unit from the control unit of the ~a5 Do running, one of the signals is in the non-operational Then, the data is input to the control unit 3 functioning as a master unit of the pump unit a1 through the communication line 5.
[0017]
When the number of pumps P in operation is one or two (No in Step 100, hereinafter, “Step” is referred to as “S”), the control unit 3 of the pump unit a1 has sufficient capacity for the main pipe 10. Since there is room, no special control is performed and the process proceeds to return.
[0018]
In contrast, at the same time the number of pump P during the operation of three (i.e., allowable operation number equal) when (S100: Yes), the control unit 3 of the pump unit a1 is pump P in the non-operational The following arithmetic control is performed according to the level of sewage in the sewage tank 1 in which is installed , that is, based on a signal from the water level gauge .
[0019]
That is, the control unit 3 of the pump unit a1 is during operation the pump P is three at the same time, the water level of the signal by the sewage of sewage tank 1 from the water level meter 2 holding tank 1 according to the pump P in the inactive If is it is determined that there is no became ago level 2H full water (S102: no), the control signal for continuing the fouling Mizuhai unloading by three pump P in current稼 movement, the communication line 5 When the water level of the sewage tank 1 related to the non-operating pump P is determined to be higher than the pre-full water level 2H (Yes in S102) , by stopping the wastewater discharged by either pump P currently running, Ru give priority to the discharge of its full capacity before the water level 2H or more and since the sewage tank 1 sewage (S104).
[0020]
This preferential discharge, when it is determined that the water level of the sewage by a signal from the water level gauge 2 holding tank 1 according to the pump P of the currently running is there is less than the pump ON level H, port of the sewage tank 1 the pump P is stopped (S106 Yes, S108), and a control signal for starting the operation of the pump P of the sewage tank 1 reaches a full level before the water level 2H pump unit which controls the pump P in the inactive This is performed by outputting (S110).
[0021]
If it is determined that there is the water level of the sewage becomes full water level 3H by a signal from the water level gauge 2 holding tank 1 according to the pump P in the non-operating (S104: No), the sewage received in the sewage tank 1 because of can not afford, emissions from the dirty water tank is of the highest priority. That is, when it is determined to be less than full water before the water level 2H by a signal from the water level gauge 2 holding tank 1 according to the pump P in operation, the control unit 3 of the pump unit a1 is pump the sewage tank 1 it outputs a control signal for stopping the P, and outputs a control signal for starting the operation of the full water level 3H since the holding tank 1 pump P (S112 YES, S114, S116).
[0022]
However, at the time when the dirty water level in the sewage water tank 1 according to the pump P in the non-operational is a full water level 3H, 3 units currently operating (allowable moving number) of holding tank 1 according to the pump P of the water level of the sewage is both full water before the water level 2H or more is abnormal situation that has occurred in a concentrated amount of sewage that can not be treated as a whole (S112: no), the pressure sewer system. Normally, the main capacity and the allowable number of movable units are set so that such an abnormal situation does not occur. If such an abnormal situation occurs , control of the pump unit a1 is possible. part 3 originating the alarm and so as not to discharge sewage for each home or the like that discharges the wastewater (S118) it is desirable.
[0023]
As described above, the master unit constantly monitors the level of sewage in each sewage tank, and there is a request for sewage discharge from the pump unit of the sewage tank related to the pumps that are not in operation while the allowable number of pumps are operating. If the number of pumps operated at the same time does not exceed the allowable number of operating units, depending on the level of sewage in each sewage tank, the operation of one of the pumps is stopped, and the sewage discharge during non-operation is reduced. Since the calculation control for preferentially operating the requested pump is performed, it is possible to effectively prevent the sewage tank from becoming full.
[0024]
In the above example, an example in which five pump unit a1 to A5 in the main pipe 10 is connected, the number of pump units that will be connected to the main pipe 10 is optional.
In the above example, the pump units a1 to A5 are permissible pump of operation number is in operation at the same time, if the dirty water level of the sewage water tank 1 according to the pump in the non-operating becomes equal to or more than before full water level Is the pump in operation when the sewage level in the sewage tank related to the pump in operation is less than the pump ON water level, or when the sewage water level in the sewage tank among the pumps that are not in operation is full. When the sewage water level of the sewage tank is less than the pre-full water level, that is, the sewage water level of the sewage tank stops the operating pump and the sewage tank is not in operation Although the pump in the so causing operation priority, the control of each pump by the control unit, by in place of the control by the sewage water level monitoring of the sewage tank described above, the control by the discharge time monitoring, or emissions monitoring You can also control The
That is, in the control based on the discharge time monitoring, if the sewage level of the sewage tank related to the pump that is not in operation is equal to or higher than the pre-full water level, among the allowable number of operating pumps that are operating at the same time, Continue to operate pumps with short sewage discharge time, stop pumps with long sewage discharge time after starting operation, and preferentially operate pumps that are not operating in sewage tanks that have reached the pre-full water level. To control. In other words, a short pumping time out discharge of dirty water after the start of operation, to run preferentially. In addition, in the control based on the emission monitoring, if the sewage level of the sewage tank related to the non-operating pump becomes equal to or higher than the pre-full water level, among the allowable number of operating pumps at the same time, Continue to operate pumps with low sewage discharge, stop pumps with high discharge from the start of sewage discharge, and preferentially operate non-operating pumps in sewage tanks that have reached the pre-full water level To control. That is, the emissions less pump dirty water after the start of operation, to run preferentially.
[0025]
【The invention's effect】
According to the present invention, in a pressure-type sewer system configured such that a pump exceeding the allowable number of units to be operated relative to the main capacity is not operated at the same time, a sewage tank in which a non-operating pump is installed is full. It made it can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a pressure sewer system according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a control operation.
[Explanation of symbols]
a1 to a5 Pump unit 1 Sewage tank 2 Water level measuring means (water level meter)
3 Control Unit 4 Communication Control Unit 5 Communication Line P Pump (Grinder Pump)

Claims

This is a pressure sewer system that pumps the sewage in each sewage tank through a branch pipe and a main pipe constituting a dendritic pipe by a pump, which is the number of pumps that can be operated simultaneously with respect to the capacity of the main pipe. In the case where the number of operating units is set ,
(A) Each sewage tank is provided with a pump unit comprising the pump, a water level measuring means, a control unit, and a communication control unit,
(B) The water level measuring means measures the water level in the sewage tank, and the water level in the sewage tank is lowered to the vicinity of the bottom of the sewage tank due to discharge of the sewage from the pump, so that the operation of the pump should be stopped. Pump-off water level that is the water level, the water level in the sewage tank becomes a predetermined height due to inflow of sewage, the pump ON water level that is the predetermined water level that should start discharging the sewage by the pump, the water level in the sewage tank is full in the sewage tank A signal indicating a full water level that is a predetermined water level that indicates a pre-full water level that is a predetermined water level in the vicinity and a full water level in a sewage tank, respectively, is output to the control unit;
(C) Among the control units, the control unit of one pump unit functions as a master unit, and the control units of other pump units function as slave units,
(C1) The master unit monitors a signal indicating the water level from the water level measuring means of its own pump unit and other pump units, and outputs a signal indicating whether the pump of each pump unit is operating or not operating. Receive
(C11) When a signal indicating the pre-full water level is input from the water level measuring means of the sewage tank related to the non-operating pump while the allowable number of pumps are simultaneously operating, the sewage related to the pump currently operating When a signal indicating less than the pump ON water level is input from the tank water level measuring means, the pump in operation of the sewage tank is stopped, and the signal indicating the level before the full water level is output or not. A control signal for starting the operation of the pump is output to the pump unit that controls the pump,
(C12) When a signal indicating the full water level is input from the water level measuring means of the sewage tank related to the non-operating pump, a signal indicating less than the pre-full water level is input from the water level measuring means of the sewage tank related to the operating pump When this is done, the operation pump is stopped, and a control signal for starting the operation of the non-operating pump of the sewage tank at the full water level is output.
(C2) The slave unit transmits a signal indicating the water level of the water level measuring means of its own pump unit and a signal indicating whether the pump is operating or not operating to the master unit, and a control signal from the master unit. Receive and control the pump,
This is a pressure sewer system.

This is a pressure sewer system that pumps the sewage in each sewage tank through a branch pipe and a main pipe constituting a dendritic pipe by a pump, which is the number of pumps that can be operated simultaneously with respect to the capacity of the main pipe. In the case where the number of operating units is set,
(A) Each sewage tank is provided with a pump unit including the pump, a water level measuring unit, a discharge time measuring unit, a control unit, and a communication control unit,
(B1) The water level measuring means measures the water level in the sewage tank, the water level in the sewage tank is lowered to the vicinity of the bottom of the sewage tank due to the discharge of the sewage from the pump, and the operation of the pump should be stopped. Pump-off water level that is the water level, the water level in the sewage tank becomes a predetermined height due to inflow of sewage, the pump ON water level that is the predetermined water level that should start discharging the sewage by the pump, the water level in the sewage tank is full in the sewage tank A signal indicating a full water level that is a predetermined water level that indicates a pre-full water level that is a predetermined water level in the vicinity and a full water level in a sewage tank, respectively, is output to the control unit;
(B2) The discharge time measuring means measures the sewage discharge time by the operated pump, and outputs a signal indicating the measured value to the control unit,
(C) Among the control units, the control unit of one pump unit functions as a master unit, and the control units of other pump units function as slave units,
(C1) The master unit monitors the signal indicating the water level from the water level measuring means of its own pump unit and other pump units and the signal indicating the measured value from the discharge time measuring means, and the pump of each pump unit Receive a signal indicating whether it is in operation or not in operation,
(C11) When a signal indicating the pre-full water level or higher is input from the water level measuring means of the sewage tank relating to the non-operating pump while the allowable number of operating pumps are operating at the same time, among the currently operating pumps, The operation of the pump with a short sewage discharge time after the start of operation is continued, and the pump with a long sewage discharge time after the start of operation is stopped. A control signal for starting the operation of the pump in operation is output to the pump unit that controls the pump.
(C12) When a signal indicating the full water level is input from the water level measuring means of the sewage tank related to the pump that is not in operation, of the pumps that are currently in operation, operate the pump that has a short sewage discharge time after the start of operation. The pump that continues and stops the discharge time of the sewage after the start of operation and outputs a control signal for starting the operation of the non-operating pump of the sewage tank at the full water level,
(C2) The slave unit transmits a signal indicating the water level of the water level measuring means of its own pump unit, a signal indicating the discharge time of the discharge time measuring means, and a signal indicating whether the pump is operating or not operating to the master unit. And receiving the control signal from the master unit to control the pump,
This is a pressure sewer system.

This is a pressure sewer system that pumps the sewage in each sewage tank through a branch pipe and a main pipe constituting a dendritic pipe by a pump, which is the number of pumps that can be operated simultaneously with respect to the capacity of the main pipe. In the case where the number of operating units is set,
(A) Each sewage tank is provided with a pump unit including the pump, a water level measuring unit, a discharge amount measuring unit, a control unit, and a communication control unit,
(B1) The water level measuring means measures the water level in the sewage tank, the water level in the sewage tank is lowered to the vicinity of the bottom of the sewage tank due to the discharge of the sewage from the pump, and the operation of the pump should be stopped. Pump-off water level that is the water level, the water level in the sewage tank becomes a predetermined height due to inflow of sewage, the pump ON water level that is the predetermined water level that should start discharging the sewage by the pump, the water level in the sewage tank is full in the sewage tank A signal indicating a full water level that is a predetermined water level that indicates a pre-full water level that is a predetermined water level in the vicinity and a full water level in a sewage tank, respectively, is output to the control unit;
(B2) The discharge measuring means measures the amount of sewage discharged by an activated pump, and outputs a signal indicating the measured value to the control unit.
(C) Among the control units, the control unit of one pump unit functions as a master unit, and the control units of other pump units function as slave units,
(C1) The master unit monitors the signal indicating the water level from the water level measuring means of its own pump unit and other pump units and the signal indicating the measured value from the discharge amount measuring means, and the pump of each pump unit Receive a signal indicating whether it is in operation or not in operation,
(C11) When a signal indicating the pre-full water level or higher is input from the water level measuring means of the sewage tank relating to the non-operating pump while the allowable number of operating pumps are operating at the same time, among the currently operating pumps, The pump with low sewage discharge after the start of operation is continued, and the pump with high sewage discharge after the start of operation is stopped, and the signal indicating the water level before full water is output. A control signal for starting the operation of the pump in operation is output to the pump unit that controls the pump.
(C12) When a signal indicating the full water level is input from the water level measuring means of the sewage tank related to the pump that is not in operation, of the pumps that are currently in operation, operate the pump that has less sewage discharge after the start of operation. The pump that continues and stops the pump with a large amount of discharged sewage after the start of operation, and outputs a control signal for starting the operation of the non-operating pump of the sewage tank at the full water level,
(C2) The slave unit transmits a signal indicating the water level of the water level measuring means of its own pump unit, a signal indicating the discharge amount of the discharge amount measuring means, and a signal indicating whether the pump is operating or not operating to the master unit. And receiving the control signal from the master unit to control the pump,
This is a pressure sewer system.

When the water level of the sewage tank related to the pump that is not in operation reaches the full water level, the sewage water level in the sewage tank related to the pump that is currently in operation is at or above the pre-full water level. The pressure-type sewer system according to any one of claims 1 to 3, wherein an alarm is issued to each household or the like that discharges sewage.