JP2004124582A

JP2004124582A - Sewage transit pump facility and its operating method

Info

Publication number: JP2004124582A
Application number: JP2002292119A
Authority: JP
Inventors: Yoshitami Muraki; 村木　良民; Naotake Takagaki; 高垣　尚武; Sounosuke Muraki; 村木　荘之助
Original assignee: Torishima Pump Manufacturing Co Ltd
Current assignee: Torishima Pump Manufacturing Co Ltd
Priority date: 2002-10-04
Filing date: 2002-10-04
Publication date: 2004-04-22
Anticipated expiration: 2022-10-04
Also published as: JP3983641B2

Abstract

PROBLEM TO BE SOLVED: To make a sewage flow into a storage tank from a separation tank through a connecting pipe, to which a sewage pump is installed, even when the sewage pump is removed in a sewage transit pump facility. SOLUTION: A bypass pipe 25 connecting the separation tank 1A and 1B inner sides of inflow sluice valves 19A and 19B for the connecting pipes 15A and 15B, in which the sewage pumps 13A and 13B are interposed, is installed. A branch pipe 27 in which one end is connected to the bypass pipe 25 and the other end is connected to the storage tank 5 is mounted. Totally-enclosed bypass sluice valves 29A and 29B are set to the bypass pipe 25. The sluice valve 19A is closed when the sewage pump 13A is removed, and the sluice valve 29A is opened. Sewage is made to flow into the storage tank 5 from the separation tank 1A through a flow path reaching the storage tank 5 through the connecting pipe 15A, the bypass pipe 25 and the branch pipe 27. COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は下水道において汚水を送水するための汚水中継ポンプ設備に関する。
【０００２】
【従来の技術】
従来、流入ゲート、粉砕機、スクリーン等をなくして小型化したいわゆるソリッドセパレーションタイプの汚水中継ポンプ設備が知られている。（例えば、特許文献１及び特許文献２参照）。
【０００３】
図１３及び図１４に示すように、このソリッドセパレーションタイプの汚水中継ポンプ設備は、分離槽１０１Ａ，１０１Ｂと貯留槽１０５を備えている。分離槽１０１Ａには上流側から汚水を流入させるための流入管１０２Ａ，１０２Ｂと、下流側に汚水を送るための送水管１０３Ａ，１０３Ｂが接続されている。各分離槽１０１Ａ，１０１Ｂと貯留槽１０５とを接続する接続管１１５Ａ，１１５Ｂが設けられ、これらの接続管１１５Ａ，１１５Ｂには汚水ポンプ１１３Ａ，１１３Ｂが介設されている。分離槽１０１Ａ，１０１Ｂ内で開口する接続管１１５Ａ，１１５Ｂの端部には汚水からし渣を分離するためのセパレーション弁１１７Ａ，１１７Ｂが取り付けられている。また、各接続管１１５Ａ，１１５Ｂには汚水ポンプ１０３Ａ，１０３Ｂの前後に常開の流入仕切弁１１９Ａ，１１９Ｂ，１２１Ａ，１２１Ｂが設けられている。
【０００４】
汚水ポンプ１１３Ａ，１１３Ｂの停止時には、図１４において細線の矢印で示すように、流入管１０２Ａ，１０２Ｂから分離槽１０１Ａ，１０１Ｂ内に流入した汚水はセパレーション弁１１７Ａ，１１７Ｂによりし渣が除去された後、接続管１１５Ａ，１１５Ｂを経て貯留槽１０５内に流入する。分離槽１０１Ａ，１０１Ｂ内には汚水から分離されたし渣が蓄積する。
【０００５】
水位計１０６の検出水位により貯留槽１０５内の汚水が所定水位まで上昇したことを検出すると、コントローラ１３１は汚水ポンプ１１３Ａ，１１３Ｂを起動する。汚水ポンプ１１３Ａ，１１３Ｂの作動時には、図１４において太線の矢印で示すように、貯留槽１０５に貯留された汚水が汚水ポンプ１１３Ａ，１１３Ｂによって接続管１１５Ａ，１１５Ｂを介して分離槽１０１Ａ，１０１Ｂ内に圧送される。その結果、分離槽１０１Ａ，１０１Ｂ内に蓄積されたし渣と共に汚水が送水管３Ａ，３Ｂから下流側に送出される。分離槽１１３Ａ，１１３Ｂ内には汚水上に浮くボール１０７が収容されている。図１４において二点鎖線で示すように、汚水ポンプ１１３Ａ，１１３Ｂによる汚水の圧送時にはボール１０７によって分離槽１０１Ａ，１０１Ｂの流入管１０２Ａ，１０２Ｂの接続部分が閉鎖され、流入管１０２Ａ，１０２Ｂへの汚水の逆流が防止される。
【０００６】
故障発生時や、保守点検等のために２台の汚水ポンプ１０３Ａ，１０３Ｂのいずれか一方を接続管から取り外す場合には、対応する流入仕切弁１９Ａ〜２１Ｂを閉弁して分離槽１０１Ａ，１０１Ｂから貯留槽１０５への汚水の流入を遮断する。他方の汚水ポンプは前述のように貯留槽１０５内の水位に応じて停止と作動を繰り返す。例えば、汚水ポンプ１０３Ａを取り外す場合には、この汚水ポンプ１０３Ａが設けられている接続管１１５Ａの流入仕切弁１１９Ａ，１２１Ａを閉弁する一方、汚水ポンプ１０３Ｂは水位計１０６により検出される貯留槽１０５内の水位に応じて停止と作動を繰り返す。
【０００７】
【特許文献１】
ドイツ特許第２９５０５０２８Ｕ１号
【特許文献２】
欧州特許第０７４４５０４１Ｂ１号
【０００８】
【発明が解決しようとする課題】
一方の汚水ポンプ１０３Ａを取り外す際には、接続管１１５Ａが遮断されるので、対応する流入管１０２Ａから分離槽１０１Ａへ汚水を流入させることができない。また、他方の汚水ポンプ１０３Ｂを作動させると、前述のようにボール１０７によって流入管２Ｂと貯留槽１０１Ｂの接続が遮断される。従って、一方の汚水ポンプ１０３Ａを取り外した状態では、他方の汚水ポンプ１０３Ｂの起動中はいずれの分離槽１０１Ａ，１０１Ｂに対しても汚水を流入させることができず、その間は流入管１０２Ａ，１０２Ｂ中にし渣を含む汚水を貯留させなければない。そのため、汚水の流入量が多いと流入管１０２Ａ，１０２Ｂで流入渋滞が発生し、上流側の管路や施設に障害が発生する可能性がある。
【０００９】
そこで、本発明は、汚水ポンプを取り外した場合にも、その汚水ポンプが設けられている接続管を介した分離槽から貯留槽への汚水の流入を可能とし、流入渋滞を防止することを課題としている。
【００１０】
【課題を解決するための手段】
本明細書において「汚水」とは、家庭、工場等からの排水、雨水、及び排水と雨水が合流した後の下水を含む。また、「管」及び「管路」とは、狭義の管、すなわちその内部に流路が形成された筒状の部材及びそれによって構成される流路のみでなく、機器のケーシング等の内部に穿設された流路等も含む。
【００１１】
前記課題を解決するために、本発明の第１の態様は、複数台の汚水ポンプと、分離槽と貯留槽とを接続し、かつ前記汚水ポンプのうちの１台が介設されている複数の接続管と、前記分離槽から前記接続管へ流入する汚水からし渣を除去するし渣分離手段とを備え、前記汚水ポンプの停止時には、前記分離槽内に流入した汚水が前記し渣分離手段によりし渣が分離された後、前記接続管を経て貯留槽に流入し、前記汚水ポンプの作動時には、前記貯留槽に貯留された汚水が前記接続管を介して前記分離槽内に圧送され、前記分離槽内に蓄積されたし渣と共に送出される汚水中継ポンプ設備において、前記接続管の前記汚水ポンプよりも前記分離槽側に設けられ、常開であってその接続管に介設された汚水ポンプの取り外し時に閉弁される流入仕切弁と、一端が前記流入仕切弁よりも分離槽側で前記接続管に接続され、他端が前記貯留槽に接続された汚水ポンプ迂回管路と、前記汚水ポンプ迂回管路に設けられ、常閉であって対応する汚水ポンプの取り外し時に開放される汚水ポンプ迂回管路仕切機構とを備えることを特徴とする、汚水中継ポンプ設備を提供する。
【００１２】
本発明の汚水中継ポンプ設備では、流入仕切弁を閉弁すると共に迂回管路仕切機構を閉鎖すれば、汚水ポンプを経ずに分離槽から貯留槽に至る流路が形成される。すなわち、分離槽から接続管及び汚水ポンプ迂回管路を経て貯留槽に至る流路が形成される。従って、複数台の汚水ポンプのうち１台を故障発生時や、保守点検時に取り外す場合であっても、流入仕切弁を閉弁すると共に迂回管路仕切機構を開放すれば、その汚水ポンプが介設されている接続管を介して分離槽から貯留槽へ汚水が流入する。
【００１３】
具体的には、汚水中継ポンプ設備は、第１及び第２の汚水ポンプを備え、前記汚水ポンプ迂回管路は、前記第１の汚水ポンプが介設された第１の前記接続管の前記流入仕切弁よりも前記分離槽側と、前記第２の汚水ポンプが介設された第２の前記接続管の前記流入仕切弁よりも前記分離槽側とを接続するバイパス管と、一端が前記バイパス管に接続され、他端が前記貯留槽に接続された分岐管とを備え、前記汚水ポンプ迂回管路仕切機構は、前記第１の接続管と前記バイパス管の接続位置と、前記バイパス管と前記分岐管との接続位置との間に設けられ、常閉であって前記第１の汚水ポンプの取り外し時に開弁される第１のバイパス管仕切弁と、前記第２の接続管と前記バイパス管の接続位置と、前記バイパス管と前記分岐管との接続位置との間に設けられ、常閉であって前記第２の汚水ポンプの取り外し時に開弁される第２のバイパス管仕切弁とを備える。
【００１４】
例えば、第１の汚水ポンプの取り外し時には第１の接続管の流入仕切弁が閉弁され、第１のバイパス管仕切弁が開弁される。従って、分離槽から第１の接続管、バイパス管、及び分岐管を経て貯留槽に至る流路が形成され、この流路を介して分離槽から貯留槽へ汚水が流入する。
【００１５】
汚水中継ポンプ設備は、前記バイパス管の接続位置よりも分離槽側の前記第１の接続管に設けられた常開の第１の洗浄用仕切弁と、前記バイパス管の接続位置よりも分離槽側の前記第２の接続管に設けられた常開の第２の洗浄用仕切弁とをさらに備え、かつ前記し渣分離手段は、第１及び第２の接続管の分離槽側の先端に取り付けられたセパレーション弁であってもよい。
【００１６】
例えば、第１の汚水ポンプの取り外し時には第１の接続管の流入仕切弁が閉弁され、第１のバイパス管仕切弁が開弁される。この状態で、第２の洗浄用仕切弁を閉弁する一方、第１の洗浄用仕切弁を開弁状態で保持し、かつ第２のバイパス管仕切弁を開弁して第２の汚水ポンプを作動させると、貯留槽に蓄積された汚水が第２の接続管からバイパス管及び第１の接続管を介して分離槽へ圧送されるので、第１の接続管に取り付けられたセパレーション弁が圧送された汚水により洗浄される。
【００１７】
あるいは、汚水中継ポンプ設備は、第１及び第２の汚水ポンプを備え、前記汚水ポンプ迂回管路は、一端が前記第１の汚水ポンプが介設された第１の前記接続管の前記流入仕切弁よりも前記分離槽側に接続され、他端が前記貯留槽に接続された第１の迂回管と、一端が前記第２の汚水ポンプが介設された第２の前記接続管の前記流入仕切弁よりも前記分離槽側に接続され、他端が前記貯留槽に接続された第２の迂回管とを備え、前記汚水ポンプ迂回管路仕切機構は、前記第１の迂回管に設けられ、常閉であって前記第１の汚水ポンプの取り外し時に開弁される第１の迂回管仕切弁と、前記第２の迂回管に設けられ、常閉であって前記第２の汚水ポンプの取り外し時に開弁される第２の迂回管仕切弁とを備えていてもよい。
【００１８】
例えば、第１の汚水ポンプの取り外し時には第１の接続管の流入仕切弁が閉弁され、第１の迂回管仕切弁が開弁される。従って、分離槽から第１の接続管及び第１の迂回管を経て貯留槽に至る流路が形成され、この流路を介して分離槽から貯留槽へ汚水が流入する。
【００１９】
前記接続管の一方の端部は前記貯留槽の底面付近で下向きに開口し、前記貯留槽の底面は前記接続管の端部に向けて下向きに傾斜していることが好ましい。接続管の端部は貯留槽の底面付近で開口しているので、貯留槽内の汚水の水位が底面近傍付近に低下するまで、汚水ポンプを作動させて貯留槽内の汚水を分離槽に圧送することができる。そのため、貯留槽内の汚水の水面に浮遊するスカム等の浮遊物を確実に汚水と共に貯留槽から分離槽に圧送することができる。また、貯留槽の底面が接続管の端部に向けて下向きに傾斜しているので、汚水ポンプを作動すると貯留内の堆積物は確実に汚水と共に接続管に吸い込まれ、分離槽に圧送される。
【００２０】
本発明の第２の態様は、複数台の汚水ポンプと、分離槽と貯留槽とを接続し、かつ前記汚水ポンプのうちの１台が介設されている複数の接続管と、前記分離槽から前記接続管へ流入する汚水からし渣を除去するし渣分離手段と、前記汚水ポンプの停止時には、前記分離槽内に流入した汚水は前記し渣分離手段によりし渣が分離された後、前記接続管を経て貯留槽に流入し、前記汚水ポンプの作動時には、前記貯留槽に貯留された汚水が前記汚水ポンプによって前記接続管を介して前記分離槽内に圧送され、前記分離槽内に蓄積されたし渣と共に送出される汚水中継ポンプ設備の運転方法であって、前記接続管に設けられた常開の流入仕切弁と、一端が前記流入仕切弁よりも分離槽側で前記接続管に接続され、他端が前記貯留槽に接続された汚水ポンプ迂回管路と、前記汚水ポンプ迂回管路に設けられ、常閉の迂回管路仕切機構とを設け、前記汚水ポンプの取り外し時には、前記流入仕切弁を閉弁すると共に、前記汚水ポンプ迂回管路仕切機構を開放し、前記分離槽から前記接続管及び迂回管路を経て貯留槽に汚水を流入させる、汚水中継ポンプ設備の運転方法を提供する。
【００２１】
【発明の実施の形態】
次に、図面に示す本発明の実施形態について詳細に説明する。
【００２２】
（第１実施形態）
図１及び図２を参照すると、汚水中継ポンプ設備は、汚水から除去されたし渣を蓄積するための２つの分離槽１Ａ，１Ｂと、し渣を除去済みの汚水を貯留するための貯留槽５とを備えている。本実施形態では、分離槽１Ａ，１Ｂは円筒状で、貯留槽５は直方体状である。
【００２３】
分離槽１Ａ，１Ｂの上端には流入管２Ａ，２Ｂが接続されており、この流入管２Ａ，２Ｂを介して上流側からの汚水が分離槽１Ａ，１Ｂに流入する。分離槽１Ａ，１Ｂ内には汚水に浮くボール７が配置されている。流入管２Ａが接続された分離槽１Ａ，１Ｂの上端付近は円錐状であり、ボール７により流入管２Ａ，２Ｂの接続部分が閉鎖されるようになっている。また、分離槽１Ａ，１Ｂの下端付近には送水管３Ａ，３Ｂが接続されており、貯留槽５内の汚水は分離槽１Ａ，１Ｂ内に蓄積されたし渣と共に送水管３Ａ，３Ｂから下流側に送出される。送水管３Ａ，３Ｂには、逆止弁９Ａ，９Ｂと手動式の送水管仕切弁１１Ａ，１１Ｂとが設けられている。分離槽１Ａ，１Ｂ、逆止弁９Ａ，９Ｂ、及び送水管仕切弁１１Ａ，１１Ｂは設備の小型化のために貯留槽５の内部に配置されている。
【００２４】
汚水中継ポンプ設備は、２つの分離槽１Ａ，１Ｂに対応して２台の汚水ポンプ１３Ａ，１３Ｂを備えている。また、各分離槽１Ａ，１Ｂと貯留槽５とを接続し、それぞれ汚水ポンプ１３Ａ，１３Ｂが介設された２系統の接続管１５Ａ，１５Ｂが設けられている。各接続管１５Ａ，１５Ｂの一端は分岐しており分離槽１Ａ，１Ｂの上端側と下端側で開口している。各接続管１５Ａ，１５Ｂの開口部分にはセパレーション弁（し渣分離手段）１７Ａ，１７Ｂが設けられている。図３に示すように、セパレーション弁１７Ａ，１７Ｂは接続管１５Ａ，１５Ｂの長手方向に形成された複数のスリット１７ａと、軸１７ｂを中心に矢印方向に回動可能な弁体１７ｃとを備えている。スリット１７ａの寸法は、汚水に含まれるし渣は通過させないが、汚水自体は通過できるように設定されている。弁体１７ｃは接続管１５Ａ，１５Ｂの開口端を閉鎖して汚水の流入を阻止するが、接続管１５Ａ，１５Ｂから流出する汚水によって開弁し、接続管１５Ａ，１５Ｂの開口端からの汚水の流出を許可する。
【００２５】
接続管１５Ａ，１５Ｂの汚水ポンプ１３Ａ，１３Ｂよりも分離槽１Ａ，１Ｂ側には手動式の流入仕切弁１９Ａ，１９Ｂが設けられている。この流入仕切弁１９Ａ，１９Ｂは、常開であり、後述するように対応する汚水ポンプ１３Ａ，１３Ｂの取り外し時にのみ閉弁される。
【００２６】
接続管１５Ａ，１５Ｂの汚水ポンプ１３Ａ，１３Ｂよりも貯留槽５側には手動式であって常開の補助流入仕切弁２１Ａ，２１Ｂが設けられている。
【００２７】
貯留槽５内には、例えば投げ込み式水位計である水位計６が配置されている。この水位計６の検出水位に基づいて、図１にのみ図示するコントローラ３１が汚水ポンプ１３Ａ，１３Ｂの停止と作動を制御する。
【００２８】
図２及び図４（Ａ）に示すように、接続管１５Ａ，１５Ｂの他端は貯留槽５内での底面２３付近に下向きに開口している。底面２３は凹部２３ａが形成され、この凹部２３ａ内に接続管１５Ａ，１５Ｂの端部が配置されている。また、底面２３には４つの平坦面２３ｂ〜２３ｅにより構成されており、各平坦面２３ｂ〜２３ｅは図４（Ａ）において矢印で示すように凹部２３ａに向けて下向きに傾斜している。なお、図４（Ｂ）に示すように、貯留槽５が円筒状の場合には、底面２３を矢印で示すように凹部２３ａに向けて下向きに傾斜する偏心した円錐面としてもよい。また、貯留槽５が直方体であっても底面２３を凹部２３ａに向けて下向きに傾斜する偏心した円錐面状としてもよい。
【００２９】
汚水ポンプ１３Ａが介設された接続管１５Ａの流入仕切弁１９Ａよりも分離槽１Ａ側の位置と、汚水ポンプ１３Ｂが介設された接続管１５Ｂの流入仕切弁１９Ｂよりも分離槽１Ｂ側の位置とを接続するバイパス管２５が設けられている。また、一端がバイパス管２５に接続され、他端が貯留槽５に接続された分岐管２７が設けられている。これらバイパス管２５及び分岐管２７が本発明における汚水ポンプ迂回管路を構成している。
【００３０】
また、接続管１５Ａとバイパス管２５の接続位置と、バイパス管２５と分岐管２７との接続位置との間に手動式のバイパス管仕切弁２９Ａが設けられている。同様に、接続管１５Ｂとバイパス管２５の接続位置と、バイパス管２５と分岐管２７との接続位置との間に手動式のバイパス管仕切弁２９Ｂが設けられている。これらバイパス管仕切弁２９Ａ，２９Ｂは常閉であって、後述するように対応する汚水ポンプ１３Ａ，１３Ｂの取り外し時に閉弁される。
【００３１】
次に、図５及び図６を参照して、２台の汚水ポンプ１３Ａ，１３Ｂを両方とも作動させる場合の汚水中継ポンプ設備の運転状態について説明する。上流側からの汚水が流入する前は、両方の汚水ポンプ１３Ａ，１３Ｂが停止している。図５（Ａ）に示すように、流入管２Ａ，２Ｂから各分離槽１Ａ，１Ｂに汚水した汚水は、セパレーション弁１７Ａ，１７Ｂによりし渣が除去された後、接続管１５Ａ，１５Ｂを介して貯留槽５に流入する。詳細には、接続管１５Ａ，１５Ｂに流入した汚水は、開弁状態の流入仕切弁１９Ａ，１９Ｂ、停止状態の汚水ポンプ１３Ａ，１３Ｂ、及び開弁状態の補助流入仕切弁２１Ａ，２１Ｂを介して貯留槽５に流入する。一方、セパレーション弁１７Ａ，１７Ｂにより汚水から分離されたし渣は分離槽１Ａ，１Ｂ内に堆積する。
【００３２】
貯留槽５内の汚水の水位が図５（Ｂ）に示す所定水位まで上昇したことを水位計６の検出水位から検知すると、コントローラ３１（図１参照）は汚水ポンプ１３Ａ，１３Ｂを起動する。汚水ポンプ１３Ａ，１３Ｂが作動すると、図６（Ａ）に示すように、貯留槽５内に貯留されている汚水が接続管１５Ａ，１５Ｂを経て分離槽１Ａ，１Ｂに圧送される。詳細には、貯留槽５から接続管１５Ａ，１５Ｂに吸い込まれた汚水は、開弁状態の補助流入仕切弁２１Ａ，２１Ｂ、作動状態の汚水ポンプ１３Ａ，１３Ｂ、及び開弁状態の流入仕切弁１９Ａ，１９Ｂを介して分離槽１Ａ，１Ｂ内に圧送される。分離槽１Ａ，１Ｂに圧送された汚水は分離槽１Ａ，１Ｂ内に堆積しているし渣と共に送水管３Ａ，３Ｂから下流側に送られる。汚水ポンプ１３Ａ，１３Ｂにより圧送される汚水によりボール７が分離槽１Ａ，１Ｂの上端の流入管２Ａ，２Ｂの接続部分を遮断するので、汚水やし渣は流入管２Ａ，２Ｂを逆流しない。図６（Ｂ）に示すように、貯留槽５内の汚水がなくなると、コントローラ３１は汚水ポンプ１３Ａ，１３Ｂを停止させる。
【００３３】
接続管１５Ａ，１５Ｂの端部は貯留槽５の底面２３付近で開口しているので、貯留槽５内の汚水の水位が底面２３近傍付近に低下するまで、汚水ポンプ１３Ａ，１３Ｂを作動させて貯留槽５内の汚水を分離槽１Ａ，１Ｂに圧送することができる。そのため、貯留槽５内の汚水の水面に浮遊するスカム等の浮遊物を確実に汚水と共に貯留槽５から分離槽１Ａ，１Ｂに圧送することができる。また、貯留槽５の底面２３を接続管１５Ａ，１５Ｂの端部に向けて下向きに傾斜しているので、汚水ポンプ１３Ａ，１３Ｂを作動すると貯留槽５内の堆積物は確実に汚水と共に接続管１５Ａ，１５Ｂに吸い込まれ、分離槽１Ａ，１Ｂに圧送される。このように貯留槽５内のスカム等の浮遊物や堆積物を確実に分離槽１Ａ，１Ｂに送ることができるので、貯留槽５内の汚水の貯留量を確保でき、堆積物による水位計６の誤作動も防止することができる。また、スカム等の浮遊物を回収することにより、貯留槽５内での腐敗臭や硫化水素の発生を抑制して貯留槽内を衛生的に保持することができる。さらに、貯留槽５内の堆積物やスカム等の浮遊物の残留を防止できるので、貯留槽５の清掃頻度を低減して維持管理費用を低減することができる。
【００３４】
１台の汚水ポンプを故障発生時や保守点検時に取り外す場合の汚水中継ポンプ設備の運転について説明する。例えば、汚水ポンプ１３Ａを取り外す場合、この汚水ポンプ１３Ａが介設されている接続管１５Ａの流入仕切弁１９Ａと補助仕切弁２１Ａを閉弁し、バイパス仕切弁２９Ａを開弁する。他方の汚水ポンプ１３Ｂと対応する接続管１５Ｂの流入仕切弁１９Ｂと補助仕切弁２１Ｂは開弁状態を維持し、バイパス仕切弁２９Ｂは閉弁状態を維持する。流入仕切弁１９Ａ，１９Ｂ、補助仕切弁２１Ａ，２１Ｂ、及びバイパス仕切弁２９Ａ，２９Ｂの開閉状態をこのように設定すると、図７において矢印で示すように、汚水ポンプ１３Ａに対応する分離槽１Ａから接続管１５Ａ、バイパス管２５、及び分岐管２７を経て貯留槽５に至る流路が形成される。従って、汚水ポンプ１３Ａを取り外した状態でも汚水ポンプ１３Ａが介設されている接続管１５Ａを介して分離槽１Ａから貯留槽５への汚水の流入が続行する。他方の汚水ポンプ１３Ｂは、図５及び図６を参照して説明したように貯留槽５内の汚水の水位に応じて停止と作動を繰り返す。従って、汚水ポンプ１３Ａを取り外している間も、分離槽１Ｂから貯留槽５への汚水の流入と、汚水ポンプ１３Ａによる貯留槽５内の汚水及び分離槽１Ｂ内に蓄積されたし渣の送水管３Ｂへの圧送とが繰り返される。
【００３５】
逆に、汚水ポンプ１３Ｂを取り外す場合には、この汚水ポンプ１３Ｂと対応する接続管１５Ｂの流入仕切弁１９Ｂと補助仕切弁２１Ｂを閉弁し、バイパス仕切弁２９Ｂを開弁する一方、汚水ポンプ１３Ａと対応する接続管１５Ａの流入仕切１９Ａと補助仕切弁２１Ａは開弁状態を維持し、バイパス仕切弁２９Ａは閉弁状態を維持する。これによって汚水ポンプ１３Ｂに対応する分離槽１Ｂから接続管１５Ｂ、バイパス管２５、及び分岐管２７を経て貯留槽５に至る流路が形成される。従って、汚水ポンプ１３Ｂを取り外した状態でも接続管１５Ｂを介して分離槽１Ｂから貯留槽５への汚水の流入が続行する。汚水ポンプ１３Ｂを取り外している間も、汚水ポンプ１３Ａは貯留槽５内の汚水の水位に応じて停止と作動を繰り返す。
【００３６】
以上のように、本実施形態の汚水中継ポンプ設備では、２台の汚水ポンプ１３Ａ，１３Ｂのうち１台を故障発生時や、保守点検時に取り外した場合であっても、その汚水ポンプ（例えば汚水ポンプ１Ａ）が介設されている接続管（接続管１Ａ）を介して分離槽（分離槽１Ａ）から貯留槽５への汚水の流入が続行される。従って、２台の汚水ポンプ１３Ａ，１３Ｂのいずれかを取り外した際に分離槽１Ａ，１Ｂに流入する汚水が流入渋滞を起こし、流入管２Ａ，２Ｂの上流側の管路や施設に障害が発生するのを防止することができる。
【００３７】
（第２実施形態）
図８及び図９に示す本発明の第２実施形態では、バイパス管２５の接続位置よりも分離槽１Ａ側の接続管１５Ａに常開の洗浄用仕切弁３３Ａが設けられている。また、バイパス管２５の接続位置よりも分離槽１Ｂ側の接続管１５Ｂにも常開の洗浄用仕切弁３３Ｂが設けられている。さらに、分岐管２７にも常開の洗浄用仕切弁３３Ｃが設けられている。
【００３８】
汚水ポンプ１３Ａの取り外し時には接続管１５Ａの流入仕切弁１９Ａ及び補助流入仕切弁２１Ａが閉弁され、バイパス管仕切弁２９Ａが開弁されている。この状態で、洗浄用仕切弁３３Ｂ，３３Ｃを閉弁する一方、洗浄用仕切弁３３Ａを開弁状態で保持する。次に、バイパス管仕切弁２９Ｂを開弁して汚水ポンプ１３Ｂを作動させると、図８において矢印で示すように、貯留槽５に蓄積された汚水が接続管１５Ｂからバイパス管２５及び接続管１５Ａを介して分離槽１Ａへ圧送され、接続管１５Ａに取り付けられたセパレーション弁１７Ａ，１７Ｂが圧送された汚水により洗浄される。
【００３９】
汚水ポンプ１３Ｂの取り外し時に、洗浄用仕切弁３３Ａ，３３Ｃを閉弁する一方、洗浄用仕切弁３３Ｂを開弁状態で保持する。次に、バイパス管仕切弁２９Ａを開弁して汚水ポンプ１３Ａを作動させると、貯留槽５に蓄積された汚水が接続管１５Ａからバイパス管２５及び接続管１５Ｂを介して分離槽１Ｂへ圧送され、接続管１５Ｂに取り付けられたセパレーション弁１７ＢＡ，１７Ｂが圧送された汚水により洗浄される。
【００４０】
このように洗浄用仕切弁３３Ａ，３３Ｂを設けることにより、取り外した汚水ポンプ（例えば汚水ポンプ１３Ａ）に対応するセパレーション弁１７Ａ，１７Ｂを他方の汚水ポンプ（汚水ポンプ１３Ｂ）により圧送される汚水で洗浄し、それによってセパレーション弁１７Ａ，１７Ｂのスリット１７ａの目詰まり等の不具合の発生を未然に防止することができる。このセパレーション弁１７Ａ，１７Ｂの洗浄は、例えば汚水ポンプ１３Ａ，１３Ｂのうち一方を取り外している間に所定時間間隔毎に実行すればよい。
【００４１】
第２実施形態のその他の構成及び作用は、前記第１実施形態と同様であるので、同一の要素には同一の符号を付して説明を省略する。
【００４２】
（第３実施形態）
図１０に示す本発明の第３実施形態では、第１実施形態のバイパス仕切弁２９Ａ，２９Ｂに代えて、バイパス管２５と分岐管２７の接続位置に流路切換機構３５を設けている。この流路切換機構３５は本発明の汚水ポンプ迂回管路仕切機構を構成し、第１実施形態ではバイパス仕切弁２９Ａ，２９Ｂの開閉により実現される接続管１５Ａ，１５Ｂと分岐管２７の連通及び遮断を単独で実現する。詳細には、流路切換機構３５は接続管１５Ａ及び接続管１５Ｂと分岐管２７の連通を遮断する状態、接続管１５Ａと分岐管２７の連通を遮断するが接続管１５Ｂと分岐管２７とを連通させる状態、並びに接続管１５Ａと分岐管２７を連通させて接続管１５Ｂと分岐管２７の連通を遮断する状態のいずれかに切り換えることができる。
【００４３】
第３実施形態のその他の構成及び作用は、前記第１実施形態と同様であるので、同一の要素には同一の符号を付して説明を省略する。
【００４４】
（第４実施形態）
図１１に示す本発明の第４実施形態では、第１実施形態のバイパス管２５及び分岐管２７に代えて、迂回管３７Ａ，３７Ｂを設けている。これらの迂回管３７Ａ，３７Ｂは本発明の汚水ポンプ迂回管路を構成する。一方の迂回管３７Ａは、一端が汚水ポンプ１３Ａが介設された接続管１５Ａの流入仕切弁１９Ａよりも分離槽１Ａ側に接続され、他端が貯留槽５に接続されている。他方の迂回管３７Ｂは、一端が汚水ポンプ１３Ｂが介設された接続管１５Ｂの流入仕切弁１９Ｂよりも分離槽１Ｂ側に接続され、他端が貯留槽５に接続されている。また、迂回管３７Ａ，３７Ｂには、それぞれ常開の迂回管仕切弁３９Ａ，３９Ｂが介設されている。これらの迂回管仕切弁１９Ａ，１９Ｂは本発明の汚水ポンプ迂回管路仕切機構を構成する。
【００４５】
汚水ポンプ１３Ａを取り外す場合には、流入仕切弁１９Ａ及び補助流入仕切弁２１Ａを閉弁し、迂回管仕切弁３９Ａを開弁する。これによって分離槽１Ａから接続管１５Ａ及び迂回管３７Ａを介して貯留槽５に達する流路が形成される。従って、汚水ポンプ１３Ａを取り外した場合でも、この流路を通って分離槽１Ａから貯留槽５への汚水の流入が続行する。逆に、汚水ポンプ１３Ｂを取り外す場合には、流入仕切弁１９Ｂ及び補助流入仕切弁２１Ｂを閉弁し、迂回管仕切弁３９Ｂを開弁すればよい。
【００４６】
第４実施形態のその他の構成及び作用は、前記第１実施形態と同様であるので、同一の要素には同一の符号を付して説明を省略する。
【００４７】
本発明は、前記実施形態に限定されず、種々の変形が可能である。
例えば、セパレーション弁１７Ａ，１７Ｂに代えて、分離槽１Ａ，１Ｂから接続管１Ａ，１Ｂに流入する汚水からし渣を除去し、かつ接続管１Ａ，１Ｂから分離槽１Ａ，１Ｂへ汚水の流入を許可する他の機構を設けてもよい。このような機構は必ずしも接続管１Ａ，１Ｂの先端に設ける必要はなく、接続管１Ａ，１Ｂの先端よりも汚水ポンプ１３Ａ，１３Ｂ側や、分離槽１Ａ，１Ｂに設けてもよい。
【００４８】
また、流入仕切弁１９Ａ，１９Ｂ、補助流入仕切弁２１Ａ，２１Ｂ、バイパス管仕切弁２９Ａ，２９Ｂ、洗浄用切換弁３３Ａ，３３Ｂ、流路切換機構３５、迂回管仕切弁３９Ａ，３９Ｂを手動式ではなく、電気的に制御可能な構成（例えば電磁弁）とし、コントローラ３１からの指令により開閉等の動作を制御してもよい。
【００４９】
さらに、図１２に示すように、汚水ポンプ１３Ａ，１３Ｂ及び接続管１５Ａ，１５Ｂ毎に分離槽１Ａ，１Ｂを設けるのではなく、単独の分離槽１としてもよい。
【００５０】
さらにまた、汚水ポンプの台数が３台以上の場合であっても本発明を適用することができる。
【００５１】
【発明の効果】
以上の説明から明らかなように、本発明では、接続管の汚水ポンプよりも分離槽側に設けられた流入仕切弁を閉弁すると共に迂回管路仕切機構を閉鎖すれば、分離槽から接続管及び汚水ポンプ迂回管路を経て貯留槽に至る流路が形成される。よって、複数台の汚水ポンプのうち１台を故障発生時や、保守点検時に取り外す場合であっても、流入仕切弁を閉弁すると共に迂回管路仕切機構を開放すれば、その汚水ポンプが介設されている接続管と汚水ポンプ迂回管路を介して分離槽から貯留槽への汚水の流入が続行される。従って、複数台の汚水ポンプのいずれかを取り外した際に分離槽に流入する汚水が流入渋滞を起こし、上流側の管路や施設に障害が発生するのを防止することができる。
【００５２】
また、接続管の一方の端部を貯留槽の底面付近で下向きに開口させ、かつ貯留槽の底面を接続管の端部に向けて下向きに傾斜させておけば、貯留槽内の堆積物や貯留槽内の汚水の水面に浮遊するスカム等の浮遊物を確実に汚水と共に貯留槽から分離槽に圧送することができる。従って、貯留槽内の汚水の貯留量を確保でき、堆積物による水位計の誤作動も防止することができる。また、スカム等の浮遊物を回収することにより、貯留槽内での腐敗臭や硫化水素の発生を抑制して貯留槽内を衛生的に保持することができる。さらに、貯留槽内の堆積物やスカム等の浮遊物の残留を防止できるので、貯留槽の清掃頻度を低減して維持管理費用を低減することができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態の汚水中継ポンプ設備を示す概略平面図である。
【図２】図１のＩＩ−ＩＩ線での概略断面図である。
【図３】セパレーション弁を示す斜視図である。
【図４】（Ａ）は貯留槽の底面を示す概略平面図、（Ｂ）は貯留槽の底面の他の例を示す概略平面図である。
【図５】（Ａ）及び（Ｂ）は汚水中継ポンプ設備の動作を説明するための概略断面図である。
【図６】（Ａ）及び（Ｂ）は汚水中継ポンプ設備の動作を説明するための概略断面図である。
【図７】一方の汚水ポンプを取り外している際の貯留槽への汚水の流入経路を示す概略平面図である。
【図８】本発明の第２実施形態の汚水中継ポンプ設備を示す概略平面図である。
【図９】図８のＩＶ−ＩＶ線での概略断面図である。
【図１０】本発明の第３実施形態の汚水中継ポンプ設備を示す概略平面図である。
【図１１】本発明の第４実施形態の汚水中継ポンプ設備を示す概略平面図である。
【図１２】分離槽が１個である場合の汚水中継ポンプ設備を示す概略平面図である。
【図１３】従来の汚水中継ポンプ設備を示す概略平面図である。
【図１４】図１２のＸＩＶ−ＸＩＶ線での概略断面図である。
【符号の説明】
１Ａ，１Ｂ　分離槽
２Ａ，２Ｂ　流入管
３Ａ，３Ｂ　送水管
５　貯留槽
６　水位計
７　ボール
９Ａ，９Ｂ　逆止弁
１１Ａ，１１Ｂ　送水管仕切弁
１３Ａ，１３Ｂ　汚水ポンプ
１５Ａ，１５Ｂ　接続管
１７Ａ，１７Ｂ　セパレーション弁
１７ａ　スリット
１７ｂ　軸
１７ｃ　弁体
１９Ａ，１９Ｂ　流入仕切弁
２１Ａ，２１Ｂ　補助流入仕切弁
２３　底面
２３ａ　凹部
２５　バイパス管
２７　分岐管
２９Ａ，２９Ｂ　バイパス管仕切弁
３１　コントローラ
３３Ａ，３３Ｂ　洗浄用切換弁
３５　流路切換機構
３７Ａ，３７Ｂ　迂回管
３９Ａ，３９Ｂ　迂回管仕切弁[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sewage relay pumping facility for sending sewage in a sewer.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a so-called solid separation type sewage relay pump equipment which is reduced in size without an inflow gate, a crusher, a screen, and the like is known. (See, for example, Patent Documents 1 and 2).
[0003]
As shown in FIGS. 13 and 14, the solid separation type sewage relay pump equipment includes separation tanks 101A and 101B and a storage tank 105. The separation tank 101A is connected to inflow pipes 102A and 102B for flowing sewage from the upstream side and water supply pipes 103A and 103B for sending sewage to the downstream side. Connection pipes 115A and 115B for connecting the separation tanks 101A and 101B and the storage tank 105 are provided, and sewage pumps 113A and 113B are interposed in these connection pipes 115A and 115B. Separation valves 117A and 117B for separating waste water from sewage are attached to ends of connection pipes 115A and 115B opened in the separation tanks 101A and 101B. The connection pipes 115A and 115B are provided with normally open inflow gate valves 119A, 119B, 121A and 121B before and after the sewage pumps 103A and 103B.
[0004]
When the sewage pumps 113A and 113B are stopped, the sewage flowing into the separation tanks 101A and 101B from the inflow pipes 102A and 102B is removed by the separation valves 117A and 117B as shown by thin arrows in FIG. Flows into the storage tank 105 via the connection pipes 115A and 115B. The sediment separated from the wastewater accumulates in the separation tanks 101A and 101B.
[0005]
When detecting that the sewage in the storage tank 105 has risen to a predetermined water level based on the detected water level of the water level meter 106, the controller 131 activates the sewage pumps 113A and 113B. When the sewage pumps 113A and 113B are operated, the sewage stored in the storage tank 105 is transferred into the separation tanks 101A and 101B by the sewage pumps 113A and 113B via the connection pipes 115A and 115B, as indicated by thick arrows in FIG. Pumped. As a result, the sewage is sent to the downstream side from the water pipes 3A and 3B together with the residue accumulated in the separation tanks 101A and 101B. The balls 107 floating on the sewage are accommodated in the separation tanks 113A and 113B. As shown by a two-dot chain line in FIG. 14, at the time of sewage pumping by the sewage pumps 113A and 113B, the connection part of the inflow pipes 102A and 102B of the separation tanks 101A and 101B is closed by the ball 107, and the sewage to the inflow pipes 102A and 102B. Backflow is prevented.
[0006]
When any one of the two sewage pumps 103A, 103B is removed from the connection pipe at the time of occurrence of a failure or for maintenance and inspection, the corresponding inflow gate valves 19A to 21B are closed to separate the separation tanks 101A, 101B. From the wastewater into the storage tank 105. The other sewage pump repeatedly stops and operates according to the water level in the storage tank 105 as described above. For example, when removing the sewage pump 103A, the inflow gate valves 119A and 121A of the connection pipe 115A provided with the sewage pump 103A are closed, while the sewage pump 103B is connected to the storage tank 105 detected by the water level meter 106. Stopping and operation are repeated according to the water level inside.
[0007]
[Patent Document 1]
German Patent No. 29505028U1
[Patent Document 2]
European Patent No. 074445041B1
[0008]
[Problems to be solved by the invention]
When one of the sewage pumps 103A is removed, the connection pipe 115A is shut off, so that sewage cannot flow into the separation tank 101A from the corresponding inflow pipe 102A. When the other sewage pump 103B is operated, the connection between the inflow pipe 2B and the storage tank 101B is cut off by the ball 107 as described above. Therefore, in a state where one of the sewage pumps 103A is removed, the sewage cannot flow into any of the separation tanks 101A and 101B while the other sewage pump 103B is being activated. The sewage containing the residue must be stored. For this reason, if the amount of inflow of sewage is large, inflow congestion occurs in the inflow pipes 102A and 102B, and there is a possibility that a failure may occur in an upstream pipeline or facility.
[0009]
In view of the above, an object of the present invention is to enable inflow of sewage from a separation tank to a storage tank via a connection pipe provided with the sewage pump even when the sewage pump is removed, thereby preventing inflow congestion. And
[0010]
[Means for Solving the Problems]
As used herein, the term “sewage” includes drainage from homes, factories, and the like, rainwater, and sewage after drainage and rainwater are combined. In addition, “pipe” and “pipe” are not limited to a pipe in a narrow sense, that is, not only a tubular member having a flow path formed therein and a flow path formed by the pipe, but also a casing or the like of a device. It also includes perforated channels and the like.
[0011]
In order to solve the above-mentioned problem, a first aspect of the present invention relates to a plurality of sewage pumps, a plurality of sewage pumps connected to a separation tank and a storage tank, and one of the sewage pumps interposed therebetween. And a sediment separation means for removing sewage from sewage flowing into the connection pipe from the separation tank, and when the sewage pump is stopped, the sewage flowing into the separation tank is subjected to the sewage separation. After the residue is separated by the means, it flows into the storage tank via the connection pipe, and when the sewage pump is operated, the sewage stored in the storage tank is pumped into the separation tank via the connection pipe. In the sewage relay pump equipment which is sent out together with the residue accumulated in the separation tank, the connection pipe is provided on the separation tank side of the connection pipe with respect to the sewage pump, is normally open, and is interposed in the connection pipe. Inflow that is closed when the wastewater pump is A valve, one end of which is connected to the connection pipe closer to the separation tank than the inflow gate valve and the other end of which is provided in the sewage pump bypass pipe connected to the storage tank and the sewage pump bypass pipe, A sewage pump bypass pipe partition mechanism that is closed and opened when the corresponding sewage pump is removed.
[0012]
In the sewage relay pump equipment of the present invention, when the inflow gate valve is closed and the bypass pipe partition mechanism is closed, a flow path from the separation tank to the storage tank is formed without passing through the sewage pump. That is, a flow path from the separation tank to the storage tank via the connection pipe and the sewage pump bypass pipe is formed. Therefore, even when one of a plurality of sewage pumps is to be removed at the time of failure or maintenance and inspection, if the inflow gate valve is closed and the bypass pipe partitioning mechanism is opened, the sewage pump will be interrupted. Sewage flows into the storage tank from the separation tank via the connecting pipe provided.
[0013]
Specifically, the sewage relay pump equipment includes first and second sewage pumps, and the sewage pump bypass pipe is connected to the first sewage pump through which the inflow of the first connection pipe is interposed. A bypass pipe that connects the separation tank side of the gate valve with the separation tank side of the inflow gate valve of the second connection pipe in which the second sewage pump is interposed; A branch pipe connected to the pipe, the other end of which is connected to the storage tank, wherein the sewage pump bypass pipe partitioning mechanism includes a connection position between the first connection pipe and the bypass pipe, and the bypass pipe. A first bypass pipe isolation valve that is provided between the connection point with the branch pipe, is normally closed, and is opened when the first sewage pump is removed, the second connection pipe, and the bypass; Connection position of the pipe, connection position between the bypass pipe and the branch pipe, It provided between, and a second bypass pipe gate valve which is opened upon removal of said second sewage pump a normally closed.
[0014]
For example, when the first sewage pump is removed, the inflow gate valve of the first connection pipe is closed, and the first bypass pipe gate valve is opened. Therefore, a flow path from the separation tank to the storage tank via the first connection pipe, the bypass pipe, and the branch pipe is formed, and sewage flows from the separation tank to the storage tank via this flow path.
[0015]
The sewage relay pumping equipment is provided with a normally open first cleaning gate valve provided on the first connection pipe closer to the separation tank than a connection position of the bypass pipe, and a separation tank more than a connection position of the bypass pipe. A normally-open second cleaning gate valve provided on the second connection pipe on the side of the first and second connection pipes, and the residue separation means is provided at a tip of the first and second connection pipes on the separation tank side. An attached separation valve may be used.
[0016]
For example, when the first sewage pump is removed, the inflow gate valve of the first connection pipe is closed, and the first bypass pipe gate valve is opened. In this state, the second cleaning gate valve is closed, the first cleaning gate valve is kept open, and the second bypass pipe gate valve is opened to open the second sewage pump. When is operated, the wastewater accumulated in the storage tank is pressure-fed from the second connection pipe to the separation tank via the bypass pipe and the first connection pipe, so that the separation valve attached to the first connection pipe is Washed by the pumped sewage.
[0017]
Alternatively, the sewage relay pump equipment includes first and second sewage pumps, and the sewage pump bypass pipe has an inflow partition of the first connection pipe having one end provided with the first sewage pump. A first bypass pipe connected to the separation tank side with respect to a valve and the other end connected to the storage tank, and an inflow of the second connection pipe having one end provided with the second sewage pump. A second bypass pipe connected to the separation tank side with respect to the gate valve and the other end connected to the storage tank; and the sewage pump bypass pipe partition mechanism is provided in the first bypass pipe. A first bypass pipe partition valve that is normally closed and is opened when the first sewage pump is removed, and a first bypass pipe isolation valve that is provided on the second bypass pipe and is normally closed and that is provided with the second sewage pump. And a second bypass pipe gate valve that is opened when detached.
[0018]
For example, when removing the first sewage pump, the inflow gate valve of the first connection pipe is closed, and the first bypass pipe gate valve is opened. Therefore, a flow path from the separation tank to the storage tank via the first connection pipe and the first bypass pipe is formed, and sewage flows from the separation tank to the storage tank via this flow path.
[0019]
It is preferable that one end of the connection pipe opens downward near the bottom of the storage tank, and the bottom of the storage tank is inclined downward toward the end of the connection pipe. Since the end of the connection pipe is open near the bottom of the storage tank, the wastewater pump is operated to pump the wastewater in the storage tank to the separation tank until the water level of the wastewater in the storage tank drops near the bottom. can do. Therefore, the suspended matter such as scum floating on the surface of the sewage in the storage tank can be reliably pumped from the storage tank to the separation tank together with the sewage. In addition, since the bottom of the storage tank is inclined downward toward the end of the connection pipe, when the sewage pump is operated, the sediment in the storage is surely sucked into the connection pipe together with the sewage and is pumped to the separation tank. .
[0020]
According to a second aspect of the present invention, a plurality of connection pipes connecting a plurality of sewage pumps, a separation tank and a storage tank, and one of the sewage pumps is provided, From the sewage flowing into the connecting pipe, the sewage separation means for removing sewage from the sewage, and when the sewage pump is stopped, the sewage flowing into the separation tank is separated by the sewage separation means by the sewage separation means, It flows into the storage tank via the connection pipe, and when the sewage pump is operated, the sewage stored in the storage tank is pressure-fed into the separation tank via the connection pipe by the sewage pump, and into the separation tank. A method for operating a sewage relay pumping facility that is sent out together with accumulated residue, wherein the normally open inflow gate valve provided in the connection pipe and the one end of the connection pipe closer to the separation tank than the inflow gate valve. And the other end connected to the storage tank. A pump bypass pipe, and a normally closed bypass pipe partition mechanism provided in the sewage pump bypass pipe. When the sewage pump is removed, the inflow partition valve is closed and the sewage pump bypass pipe is closed. A method for operating a sewage relay pumping facility, in which a path partitioning mechanism is opened and sewage flows from the separation tank to the storage tank via the connection pipe and the bypass pipe, is provided.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention shown in the drawings will be described in detail.
[0022]
(1st Embodiment)
Referring to FIG. 1 and FIG. 2, the sewage relay pump equipment includes two separation tanks 1A and 1B for accumulating sewage removed from sewage, and a storage tank for storing sewage from which sewage has been removed. 5 is provided. In the present embodiment, the separation tanks 1A and 1B have a cylindrical shape, and the storage tank 5 has a rectangular parallelepiped shape.
[0023]
Inflow pipes 2A and 2B are connected to upper ends of the separation tanks 1A and 1B, respectively, and sewage from an upstream side flows into the separation tanks 1A and 1B via the inflow pipes 2A and 2B. In the separation tanks 1A and 1B, balls 7 floating on sewage are arranged. The vicinity of the upper ends of the separation tanks 1A and 1B to which the inflow pipes 2A are connected has a conical shape, and the ball 7 closes the connection between the inflow pipes 2A and 2B. Water pipes 3A, 3B are connected near the lower ends of the separation tanks 1A, 1B, and the wastewater in the storage tank 5 is downstream from the water pipes 3A, 3B together with the residue accumulated in the separation tanks 1A, 1B. Sent to the side. The water pipes 3A, 3B are provided with check valves 9A, 9B and a manual water pipe separation valve 11A, 11B. The separation tanks 1A and 1B, the check valves 9A and 9B, and the water pipe separation valves 11A and 11B are arranged inside the storage tank 5 for downsizing of the equipment.
[0024]
The sewage relay pump equipment is provided with two sewage pumps 13A and 13B corresponding to the two separation tanks 1A and 1B. In addition, two connection pipes 15A and 15B are provided to connect the respective separation tanks 1A and 1B and the storage tank 5 and to interpose sewage pumps 13A and 13B, respectively. One end of each of the connection pipes 15A, 15B is branched and opened at the upper and lower ends of the separation tanks 1A, 1B. Separation valves (residue separating means) 17A, 17B are provided at the opening portions of the connection pipes 15A, 15B. As shown in FIG. 3, the separation valves 17A and 17B include a plurality of slits 17a formed in the longitudinal direction of the connection pipes 15A and 15B, and a valve body 17c that is rotatable in the direction of an arrow about a shaft 17b. I have. The dimensions of the slit 17a are set so that the waste contained in the sewage is not allowed to pass, but the sewage itself is allowed to pass. The valve element 17c closes the open ends of the connection pipes 15A and 15B to prevent the inflow of sewage, but is opened by the sewage flowing out of the connection pipes 15A and 15B, and the sewage from the open ends of the connection pipes 15A and 15B. Allow spill.
[0025]
Manual inflow gate valves 19A and 19B are provided on the separation pipes 1A and 1B side of the connection pipes 15A and 15B with respect to the sewage pumps 13A and 13B. The inflow gate valves 19A, 19B are normally open, and are closed only when the corresponding sewage pumps 13A, 13B are removed as described later.
[0026]
On the storage tank 5 side of the connection pipes 15A, 15B with respect to the sewage pumps 13A, 13B, auxiliary inflow gate valves 21A, 21B which are manually operated and are normally open are provided.
[0027]
In the storage tank 5, a water level gauge 6 which is, for example, a throw-in type water level meter is arranged. Based on the water level detected by the water level gauge 6, the controller 31 shown only in FIG. 1 controls the stop and operation of the sewage pumps 13A and 13B.
[0028]
As shown in FIGS. 2 and 4A, the other ends of the connection pipes 15A and 15B open downward near the bottom surface 23 in the storage tank 5. A concave portion 23a is formed in the bottom surface 23, and the ends of the connection pipes 15A and 15B are arranged in the concave portion 23a. Further, the bottom surface 23 is constituted by four flat surfaces 23b to 23e, and each of the flat surfaces 23b to 23e is inclined downward toward the concave portion 23a as shown by an arrow in FIG. In addition, as shown in FIG. 4 (B), when the storage tank 5 is cylindrical, the bottom surface 23 may be formed as an eccentric conical surface inclined downward toward the concave portion 23a as shown by an arrow. Further, even if the storage tank 5 is a rectangular parallelepiped, the bottom surface 23 may have an eccentric conical surface inclined downward toward the concave portion 23a.
[0029]
A position on the separation tank 1A side of the inflow gate valve 19A of the connection pipe 15A in which the sewage pump 13A is interposed, and a position on the separation tank 1B side of the inflow gate valve 19B of the connection pipe 15B in which the sewage pump 13B is interposed. Is provided with a bypass pipe 25 for connection between Further, a branch pipe 27 having one end connected to the bypass pipe 25 and the other end connected to the storage tank 5 is provided. The bypass pipe 25 and the branch pipe 27 constitute a sewage pump bypass pipe in the present invention.
[0030]
A manual bypass pipe isolation valve 29A is provided between the connection position between the connection pipe 15A and the bypass pipe 25 and the connection position between the bypass pipe 25 and the branch pipe 27. Similarly, a manual bypass pipe isolation valve 29B is provided between a connection position between the connection pipe 15B and the bypass pipe 25 and a connection position between the bypass pipe 25 and the branch pipe 27. These bypass pipe isolation valves 29A and 29B are normally closed, and are closed when the corresponding sewage pumps 13A and 13B are removed as described later.
[0031]
Next, with reference to FIG. 5 and FIG. 6, an operation state of the wastewater relay pump equipment when both the two wastewater pumps 13A and 13B are operated will be described. Before the sewage flows from the upstream side, both sewage pumps 13A and 13B are stopped. As shown in FIG. 5 (A), the sewage sewage from the inflow pipes 2A, 2B to the respective separation tanks 1A, 1B is removed through the connection valves 15A, 15B after the residue is removed by the separation valves 17A, 17B. It flows into the storage tank 5. In detail, the sewage flowing into the connection pipes 15A and 15B passes through the inflow gate valves 19A and 19B in the open state, the sewage pumps 13A and 13B in the stopped state, and the auxiliary inflow gate valves 21A and 21B in the open state. It flows into the storage tank 5. On the other hand, the residue separated from the wastewater by the separation valves 17A and 17B accumulates in the separation tanks 1A and 1B.
[0032]
When detecting that the water level of the sewage in the storage tank 5 has risen to the predetermined water level shown in FIG. 5B from the water level detected by the water level gauge 6, the controller 31 (see FIG. 1) activates the sewage pumps 13A and 13B. When the sewage pumps 13A and 13B operate, the sewage stored in the storage tank 5 is pumped to the separation tanks 1A and 1B via the connection pipes 15A and 15B, as shown in FIG. In detail, the sewage sucked into the connection pipes 15A and 15B from the storage tank 5 is supplied to the auxiliary inflow gate valves 21A and 21B in the open state, the sewage pumps 13A and 13B in the operating state, and the inflow gate valve 19A in the open state. , 19B into the separation tanks 1A, 1B. The sewage pumped to the separation tanks 1A, 1B is accumulated in the separation tanks 1A, 1B and is sent downstream from the water pipes 3A, 3B together with the residue. The ball 7 blocks the connection between the inflow pipes 2A and 2B at the upper ends of the separation tanks 1A and 1B by the sewage pumped by the sewage pumps 13A and 13B, so that the sewage and the residue do not flow backward through the inflow pipes 2A and 2B. As shown in FIG. 6B, when the waste water in the storage tank 5 runs out, the controller 31 stops the waste water pumps 13A and 13B.
[0033]
Since the ends of the connection pipes 15A and 15B are open near the bottom surface 23 of the storage tank 5, the sewage pumps 13A and 13B are operated until the water level of the sewage in the storage tank 5 decreases to near the bottom surface 23. The sewage in the storage tank 5 can be pumped to the separation tanks 1A and 1B. Therefore, the suspended matter such as scum floating on the surface of the sewage in the storage tank 5 can be reliably pumped from the storage tank 5 to the separation tanks 1A and 1B together with the sewage. In addition, since the bottom surface 23 of the storage tank 5 is inclined downward toward the ends of the connection pipes 15A and 15B, when the sewage pumps 13A and 13B are operated, the sediment in the storage tank 5 is reliably connected to the connection pipe with the sewage. It is sucked into 15A, 15B, and is pressure-fed to separation tank 1A, 1B. As described above, the suspended matter such as the scum and the sediment in the storage tank 5 can be reliably sent to the separation tanks 1A and 1B. Can also be prevented from malfunctioning. Further, by collecting suspended matters such as scum, it is possible to suppress the generation of putrefaction odor and hydrogen sulfide in the storage tank 5 and to maintain the storage tank in a sanitary manner. Furthermore, since the suspended matter such as sediment and scum in the storage tank 5 can be prevented from remaining, the frequency of cleaning the storage tank 5 can be reduced, and the maintenance cost can be reduced.
[0034]
The operation of the sewage relay pump equipment when one sewage pump is removed at the time of failure or maintenance and inspection will be described. For example, when removing the sewage pump 13A, the inflow gate valve 19A and the auxiliary gate valve 21A of the connection pipe 15A in which the sewage pump 13A is interposed are closed, and the bypass gate valve 29A is opened. The inflow gate valve 19B and the auxiliary gate valve 21B of the connection pipe 15B corresponding to the other sewage pump 13B maintain the open state, and the bypass gate valve 29B maintains the closed state. When the open / close states of the inflow gate valves 19A, 19B, the auxiliary gate valves 21A, 21B, and the bypass gate valves 29A, 29B are set in this manner, as shown by arrows in FIG. 7, the separation tank 1A corresponding to the sewage pump 13A is opened. A flow path that reaches the storage tank 5 via the connection pipe 15A, the bypass pipe 25, and the branch pipe 27 is formed. Therefore, even when the sewage pump 13A is detached, the inflow of sewage from the separation tank 1A to the storage tank 5 continues through the connection pipe 15A in which the sewage pump 13A is interposed. The other sewage pump 13B repeatedly stops and operates according to the level of the sewage in the storage tank 5 as described with reference to FIGS. Therefore, even while the sewage pump 13A is removed, the inflow of sewage from the separation tank 1B to the storage tank 5 and the water pipe for the sewage in the storage tank 5 and the sediment accumulated in the separation tank 1B by the sewage pump 13A. Pumping to 3B is repeated.
[0035]
Conversely, when removing the sewage pump 13B, the inflow gate valve 19B and the auxiliary gate valve 21B of the connection pipe 15B corresponding to the sewage pump 13B are closed, the bypass gate valve 29B is opened, and the sewage pump 13A is opened. The inflow gate 19A and the auxiliary gate valve 21A of the connecting pipe 15A corresponding to the above state maintain the valve open state, and the bypass gate valve 29A maintains the valve closed state. Thereby, a flow path from the separation tank 1B corresponding to the sewage pump 13B to the storage tank 5 via the connection pipe 15B, the bypass pipe 25, and the branch pipe 27 is formed. Therefore, even when the sewage pump 13B is removed, the inflow of sewage from the separation tank 1B to the storage tank 5 via the connection pipe 15B continues. While the sewage pump 13B is removed, the sewage pump 13A repeatedly stops and operates according to the level of the sewage in the storage tank 5.
[0036]
As described above, in the sewage relay pump equipment of the present embodiment, even if one of the two sewage pumps 13A and 13B is removed at the time of failure or during maintenance and inspection, the sewage pump (for example, sewage pump) The inflow of sewage from the separation tank (separation tank 1A) to the storage tank 5 is continued via the connection pipe (connection pipe 1A) provided with the pump 1A). Therefore, when one of the two sewage pumps 13A, 13B is removed, sewage flowing into the separation tanks 1A, 1B causes inflow congestion, and failures occur in pipes and facilities upstream of the inflow pipes 2A, 2B. Can be prevented.
[0037]
(2nd Embodiment)
In the second embodiment of the present invention shown in FIGS. 8 and 9, a normally-open cleaning gate valve 33 A is provided in the connection pipe 15 A on the separation tank 1 A side from the connection position of the bypass pipe 25. A normally open cleaning gate valve 33B is also provided on the connection pipe 15B closer to the separation tank 1B than the connection position of the bypass pipe 25. Further, the branch pipe 27 is also provided with a normally-open cleaning gate valve 33C.
[0038]
When the sewage pump 13A is removed, the inflow gate valve 19A and the auxiliary inflow gate valve 21A of the connection pipe 15A are closed, and the bypass pipe gate valve 29A is opened. In this state, the cleaning gate valves 33B and 33C are closed, while the cleaning gate valve 33A is kept open. Next, when the sewage pump 13B is operated by opening the bypass pipe isolation valve 29B, the sewage accumulated in the storage tank 5 is transferred from the connection pipe 15B to the bypass pipe 25 and the connection pipe 15A as shown by arrows in FIG. , And the separation valves 17A and 17B attached to the connection pipe 15A are washed with the sewage pumped.
[0039]
When the sewage pump 13B is removed, the cleaning gate valves 33A and 33C are closed, while the cleaning gate valve 33B is kept open. Next, when the sewage pump 13A is operated by opening the bypass pipe isolation valve 29A, the sewage accumulated in the storage tank 5 is pumped from the connection pipe 15A to the separation tank 1B via the bypass pipe 25 and the connection pipe 15B. Then, the separation valves 17BA, 17B attached to the connection pipe 15B are washed by the sewage pumped.
[0040]
By providing the cleaning gate valves 33A and 33B in this manner, the separation valves 17A and 17B corresponding to the removed sewage pump (for example, the sewage pump 13A) are washed with the sewage pumped by the other sewage pump (the sewage pump 13B). However, this makes it possible to prevent problems such as clogging of the slits 17a of the separation valves 17A and 17B. The cleaning of the separation valves 17A and 17B may be executed at predetermined time intervals while one of the sewage pumps 13A and 13B is removed, for example.
[0041]
Other configurations and operations of the second embodiment are the same as those of the first embodiment, and therefore, the same elements are denoted by the same reference numerals and description thereof will be omitted.
[0042]
(Third embodiment)
In the third embodiment of the present invention shown in FIG. 10, a flow path switching mechanism 35 is provided at a connection position between the bypass pipe 25 and the branch pipe 27 instead of the bypass gate valves 29A and 29B of the first embodiment. The flow path switching mechanism 35 constitutes a sewage pump bypass pipe partitioning mechanism of the present invention. In the first embodiment, communication between the connection pipes 15A and 15B and the branch pipe 27 realized by opening and closing of the bypass separation valves 29A and 29B is performed. Realize the isolation alone. More specifically, the flow path switching mechanism 35 disconnects the communication between the connection pipes 15A and 15B and the branch pipe 27, and cuts off the communication between the connection pipes 15A and the branch pipe 27. The state can be switched to any of a state in which the connection pipe 15A communicates with the branch pipe 27 and a state in which the communication between the connection pipe 15B and the branch pipe 27 is interrupted.
[0043]
Other configurations and operations of the third embodiment are the same as those of the first embodiment, and therefore, the same elements are denoted by the same reference numerals and description thereof will be omitted.
[0044]
(Fourth embodiment)
In the fourth embodiment of the present invention shown in FIG. 11, bypass pipes 37A and 37B are provided instead of the bypass pipe 25 and the branch pipe 27 of the first embodiment. These bypass pipes 37A and 37B constitute a wastewater pump bypass pipe of the present invention. One of the bypass pipes 37A has one end connected to the separation tank 1A side of the inflow gate valve 19A of the connection pipe 15A in which the sewage pump 13A is interposed, and the other end connected to the storage tank 5. One end of the other bypass pipe 37B is connected to the separation tank 1B side from the inflow gate valve 19B of the connection pipe 15B in which the sewage pump 13B is interposed, and the other end is connected to the storage tank 5. The bypass pipes 37A and 37B are provided with normally open bypass pipe isolation valves 39A and 39B, respectively. These bypass pipe partition valves 19A and 19B constitute a sewage pump bypass pipe partition mechanism of the present invention.
[0045]
When removing the sewage pump 13A, the inflow gate valve 19A and the auxiliary inflow gate valve 21A are closed, and the bypass pipe gate valve 39A is opened. Thus, a flow path from the separation tank 1A to the storage tank 5 via the connection pipe 15A and the bypass pipe 37A is formed. Therefore, even when the sewage pump 13A is removed, the inflow of sewage from the separation tank 1A to the storage tank 5 through this flow path continues. Conversely, when removing the sewage pump 13B, the inflow gate valve 19B and the auxiliary inflow gate valve 21B may be closed, and the bypass pipe gate valve 39B may be opened.
[0046]
Other configurations and operations of the fourth embodiment are the same as those of the first embodiment, and therefore, the same elements will be denoted by the same reference characters and description thereof will be omitted.
[0047]
The present invention is not limited to the above embodiment, and various modifications are possible.
For example, in place of the separation valves 17A and 17B, the sediment is removed from the sewage flowing into the connection pipes 1A and 1B from the separation tanks 1A and 1B, and the inflow of the sewage into the separation tanks 1A and 1B from the connection pipes 1A and 1B. Other mechanisms for permitting may be provided. Such a mechanism does not necessarily need to be provided at the distal ends of the connection pipes 1A, 1B, and may be provided at the sewage pumps 13A, 13B side or the separation tanks 1A, 1B beyond the distal ends of the connection pipes 1A, 1B.
[0048]
Further, the inflow gate valves 19A and 19B, the auxiliary inflow gate valves 21A and 21B, the bypass pipe gate valves 29A and 29B, the cleaning switching valves 33A and 33B, the flow path switching mechanism 35, and the bypass pipe gate valves 39A and 39B are manually operated. Instead, an electrically controllable configuration (for example, a solenoid valve) may be used, and operations such as opening and closing may be controlled by a command from the controller 31.
[0049]
Further, as shown in FIG. 12, instead of providing the separation tanks 1A and 1B for each of the sewage pumps 13A and 13B and the connection pipes 15A and 15B, a single separation tank 1 may be used.
[0050]
Furthermore, the present invention can be applied even when the number of sewage pumps is three or more.
[0051]
【The invention's effect】
As is clear from the above description, in the present invention, if the inflow gate valve provided on the separation tank side of the connection pipe with respect to the sewage pump is closed and the bypass pipe separation mechanism is closed, the connection pipe can be separated from the separation tank. And a flow path to the storage tank via the sewage pump bypass pipe is formed. Therefore, even when one of the plurality of sewage pumps is out of order at the time of failure or during maintenance and inspection, if the inflow gate valve is closed and the bypass pipe partitioning mechanism is opened, the sewage pump is interposed. The inflow of sewage from the separation tank to the storage tank is continued through the provided connection pipe and the sewage pump bypass pipe. Therefore, it is possible to prevent the sewage flowing into the separation tank when any one of the plurality of sewage pumps is detached from causing a congestion of the sewage and causing troubles in the upstream pipelines and facilities.
[0052]
Also, if one end of the connection pipe is opened downward near the bottom of the storage tank and the bottom of the storage tank is inclined downward toward the end of the connection pipe, sediment in the storage tank can be reduced. Suspended matter such as scum floating on the surface of the sewage in the storage tank can be reliably pumped from the storage tank to the separation tank together with the sewage. Therefore, the storage amount of the wastewater in the storage tank can be secured, and the malfunction of the water level gauge due to the sediment can be prevented. In addition, by collecting suspended matter such as scum, it is possible to suppress the generation of putrefaction odor and hydrogen sulfide in the storage tank and to maintain the storage tank in a sanitary manner. Furthermore, since the suspended matter such as sediment and scum in the storage tank can be prevented from remaining, the frequency of cleaning the storage tank can be reduced, and the maintenance cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing sewage relay pump equipment according to a first embodiment of the present invention.
FIG. 2 is a schematic sectional view taken along line II-II in FIG.
FIG. 3 is a perspective view showing a separation valve.
FIG. 4A is a schematic plan view showing a bottom surface of a storage tank, and FIG. 4B is a schematic plan view showing another example of the bottom surface of the storage tank.
FIGS. 5A and 5B are schematic cross-sectional views for explaining the operation of the wastewater relay pump equipment.
FIGS. 6A and 6B are schematic cross-sectional views for explaining the operation of the wastewater relay pump equipment.
FIG. 7 is a schematic plan view showing an inflow path of sewage into a storage tank when one sewage pump is removed.
FIG. 8 is a schematic plan view showing sewage relay pump equipment according to a second embodiment of the present invention.
FIG. 9 is a schematic sectional view taken along line IV-IV in FIG. 8;
FIG. 10 is a schematic plan view showing sewage relay pump equipment according to a third embodiment of the present invention.
FIG. 11 is a schematic plan view showing a sewage relay pump equipment according to a fourth embodiment of the present invention.
FIG. 12 is a schematic plan view showing the sewage relay pump equipment when there is one separation tank.
FIG. 13 is a schematic plan view showing a conventional sewage relay pump facility.
FIG. 14 is a schematic sectional view taken along line XIV-XIV in FIG. 12;
[Explanation of symbols]
1A, 1B separation tank
2A, 2B Inflow pipe
3A, 3B water pipe
5 Storage tank
6 Water level gauge
7 ball
9A, 9B check valve
11A, 11B water pipe isolation valve
13A, 13B Sewage pump
15A, 15B connection pipe
17A, 17B Separation valve
17a slit
17b axis
17c valve body
19A, 19B Inflow gate valve
21A, 21B Auxiliary inflow gate valve
23 bottom
23a recess
25 Bypass pipe
27 Branch pipe
29A, 29B Bypass pipe gate valve
31 Controller
33A, 33B Switching valve for cleaning
35 Channel switching mechanism
37A, 37B bypass pipe
39A, 39B bypass pipe gate valve

Claims

Multiple sewage pumps,
A plurality of connection pipes connecting the separation tank and the storage tank, and one of the sewage pumps is interposed;
And a waste separation means for removing waste waste from the wastewater flowing into the connection pipe from the separation tank,
When the sewage pump is stopped, sewage flowing into the separation tank is separated into sewage by the sewage separation means, and then flows into the storage tank via the connection pipe,
During operation of the sewage pump, sewage stored in the storage tank is pressure-fed into the separation tank via the connection pipe, and the sewage relay pump equipment that is sent out together with the residue accumulated in the separation tank,
An inflow gate valve that is provided on the separation tank side of the connection pipe with respect to the sewage pump, is normally open, and is closed when a sewage pump provided in the connection pipe is removed.
A sewage pump bypass pipe having one end connected to the connection pipe on the separation tank side of the inflow gate valve and the other end connected to the storage tank;
A sewage pump bypass pipe partition mechanism that is provided in the sewage pump bypass pipe and is normally closed and opened when the corresponding sewage pump is removed.

First and second sewage pumps,
The sewage pump bypass pipe,
The separation tank closer to the separation tank than the inflow gate valve of the first connection pipe in which the first sewage pump is provided, and the inflow of the second connection pipe in which the second sewage pump is provided. A bypass pipe connecting the separation tank side with respect to the gate valve,
A branch pipe having one end connected to the bypass pipe and the other end connected to the storage tank;
The sewage pump bypass pipe partition mechanism,
It is provided between a connection position of the first connection pipe and the bypass pipe and a connection position of the bypass pipe and the branch pipe, and is normally closed and opened when the first sewage pump is removed. A first bypass pipe gate valve;
It is provided between a connection position of the second connection pipe and the bypass pipe and a connection position of the bypass pipe and the branch pipe, and is normally closed and opened when the second sewage pump is removed. The sewage relay pump equipment according to claim 1, further comprising a second bypass pipe gate valve.

A normally-open first cleaning gate valve provided on the first connection pipe closer to the separation tank than the connection position of the bypass pipe;
A normally open second cleaning gate valve provided on the second connection pipe closer to the separation tank than a connection position of the bypass pipe, and wherein the residue separation means includes first and second cleaning valves. The sewage relay pump equipment according to claim 2, characterized in that the separation pipe is a separation valve attached to the end of the connection pipe on the separation tank side.

First and second sewage pumps,
The sewage pump bypass pipe,
A first bypass pipe having one end connected to the separation tank side of the inflow gate valve of the first connection pipe in which the first sewage pump is interposed, and the other end connected to the storage tank; ,
A second bypass pipe having one end connected to the separation tank side of the inflow gate valve of the second connection pipe in which the second sewage pump is interposed, and the other end connected to the storage tank; With
The sewage pump bypass pipe partition mechanism,
A first bypass pipe isolation valve that is provided in the first bypass pipe, is normally closed, and is opened when the first sewage pump is removed;
The sewage relay pump equipment according to claim 1, further comprising: a second bypass pipe partition valve that is provided in the second bypass pipe, is normally closed, and is opened when the second sewage pump is removed.

The one end of the connection pipe is opened downward near the bottom of the storage tank, and the bottom of the storage tank is inclined downward toward the end of the connection pipe. The sewage relay pump equipment according to any one of the above.

Multiple sewage pumps,
A plurality of connection pipes connecting the separation tank and the storage tank, and one of the sewage pumps is interposed;
A sewage separation means for removing sewage from sewage flowing into the connection pipe from the separation tank;
When the sewage pump is stopped, the sewage flowing into the separation tank flows into the storage tank via the connection pipe after the sewage is separated by the sewage separation means,
During operation of the sewage pump, sewage stored in the storage tank is pressure-fed into the separation tank by the sewage pump via the connection pipe, and is sent together with sewage accumulated in the separation tank. Operating method of the pump equipment,
A normally open inflow gate valve provided in the connection pipe,
A sewage pump bypass pipe having one end connected to the connection pipe on the separation tank side of the inflow gate valve and the other end connected to the storage tank;
Provided in the sewage pump bypass pipe, provided with a normally closed bypass pipe partition mechanism,
When the sewage pump is removed, the inflow gate valve is closed, the sewage pump bypass pipe partition mechanism is opened, and sewage flows from the separation tank into the storage tank via the connection pipe and the bypass pipe. Operation method of sewage relay pump equipment.