JP2015014088A - Underground drainage pump facility - Google Patents

Underground drainage pump facility Download PDF

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JP2015014088A
JP2015014088A JP2013139623A JP2013139623A JP2015014088A JP 2015014088 A JP2015014088 A JP 2015014088A JP 2013139623 A JP2013139623 A JP 2013139623A JP 2013139623 A JP2013139623 A JP 2013139623A JP 2015014088 A JP2015014088 A JP 2015014088A
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water
tank
initial
drainage pump
storage tank
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JP6242097B2 (en
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千葉　真
Makoto Chiba
真 千葉
内田　義弘
Yoshihiro Uchida
義弘 内田
喜裕 山川
Yoshihiro Yamakawa
喜裕 山川
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Ebara Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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    • Y02A20/20—Controlling water pollution; Waste water treatment

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Abstract

PROBLEM TO BE SOLVED: To prevent environmental damage by keeping initial refuse flowing into an underground drainage pump facility in an initial precipitation stage from being flowed out into a river where discharge water is discharged thereinto and to appropriately treat the initial refuse within a conventional pump facility in an urban area having limitation in a site space.SOLUTION: In an underground drainage pump facility 1 which has a suction tank 2 to receive inflow water from an inflow water channel 20 and a drainage pump 11 to pump water in the suction tank 2, an initial refuse storage tank 3 is provided at a bottom section of the suction tank 2 to store the inflow water, containing sludge or refuse, which flows into the suction tank 2 from the inflow water channel 20 in an initial precipitation stage.

Description

本発明は、地下排水ポンプ設備（地下排水機場）に係り、特に汚水と雨水とを集めて処理する合流式下水道や大雨が降った際の河川氾濫といった災害防止用の地下放水路を使用した排水システムにおける地下排水ポンプ設備に関するものである。   The present invention relates to an underground drainage pump facility (underground drainage pump station), and in particular, drainage using an underground discharge channel for preventing disasters such as a combined sewer that collects and treats sewage and rainwater and river flooding when heavy rain falls. It relates to underground drainage pump equipment in the system.

合流式下水道においては、家庭や工場などから排出される汚水と降雨による雨水とが下水管に集められ、これらが下流に設置された下水処理場で処理された後、河川や海などの放流領域に放流される。上述した下水管は、その内部を下水が自然流下するように傾斜した状態で設置されるため、ある程度の深さの位置に下水を所定の高さまで汲み上げるポンプ設備が設けられる。ここで、集中豪雨などが発生した場合などには、下流の下水処理場で処理しきれないほど大量の雨水が下水管に流れ込んでくることがある。このような場合には、幹線下水管からの越流水を放水路に導入し、放水路に設置されるポンプ設備から放流領域に処理場を介さず直接放流して浸水などの災害が発生することを防止している。   In combined sewers, sewage discharged from households and factories and rainwater from rainfall are collected in sewer pipes and treated in a sewage treatment plant installed downstream, and then discharged into rivers, seas, and other areas. To be released. Since the above-described sewage pipe is installed in an inclined state so that the sewage naturally flows down, a pump facility for pumping sewage to a predetermined height is provided at a certain depth. Here, when a heavy rain occurs, a large amount of rainwater may flow into the sewage pipe so that it cannot be treated at the downstream sewage treatment plant. In such cases, overflow water from the main sewage pipe is introduced into the discharge channel and discharged directly from the pump equipment installed in the discharge channel to the discharge area without going through the treatment plant. Is preventing.

また、大雨が降った際の河川氾濫といった災害防止用の都市型下水道システムとして、地下放水路を使用した排水システムがある。図１０に示すように、この排水システムでは、複数の小河川と連通する複数の立坑１００を互いに接続する地下放水路１０１が、地下５０〜６０ｍの深さに埋設されている。また、地下放水路１０１は地下に設置された排水ポンプ設備の吸込水槽１０２に接続されている。このような構成において、大雨により小河川が氾濫しそうな場合には、立坑１００から地下放水路１０１に水が送られ、さらに地下放水路１０１より排水ポンプ設備の吸込水槽１０２に水が集められ、ポンプＰによって吐出河川へ排水されることにより小河川の氾濫を防止している。   In addition, there is a drainage system using an underground drainage channel as an urban sewerage system for preventing disasters such as river flooding when heavy rain falls. As shown in FIG. 10, in this drainage system, an underground water discharge channel 101 that connects a plurality of vertical shafts 100 communicating with a plurality of small rivers to each other is buried at a depth of 50 to 60 m underground. The underground water discharge channel 101 is connected to a suction water tank 102 of a drainage pump facility installed underground. In such a configuration, when a small river is likely to be flooded due to heavy rain, water is sent from the shaft 100 to the underground water discharge channel 101, and further, water is collected from the underground water discharge channel 101 to the suction water tank 102 of the drainage pump facility, By draining into the discharge river by the pump P, the inundation of the small river is prevented.

上述した汚水と雨水とを集めて処理する合流式下水道や地下放水路を使用した排水システムにおいては、降雨の初期段階において大量の水がドライな状態の放水路に流れ込むことによって、放水路内に残留していたスカムや放水路表面に固着していたゴミが剥がされ、これらの塵芥が下水中のし渣とともにポンプ設備に一気に流れ込む場合がある。放水路に設置されたポンプ設備では、流入した下水を排水ポンプによって下水処理場を介さず直接放流領域に放流するようにしているため、下水とともにポンプ設備に流入したし渣もしくは塵芥がそのまま河川や海などの放流領域に放流され、周囲の環境を害する虞があった。   In the drainage system using the combined sewer and underground drainage that collects and treats the sewage and rainwater as described above, a large amount of water flows into the dry drainage channel at the initial stage of rainfall. Residual scum and dust adhering to the surface of the spillway may be peeled off, and these dusts may flow into the pump facility together with the sewage residue. In the pump facility installed in the discharge channel, the inflowing sewage is discharged directly to the discharge area by the drainage pump without going through the sewage treatment plant. There was a risk that it would be discharged into discharge areas such as the sea and harm the surrounding environment.

従来は、放水路の残水の水質悪化による腐敗および異臭を防止し、降雨初期におけるし渣もしくは塵芥（以下、適宜、初期塵芥ともいう）が発生しないように、放水路をドライな状態に保ち、適宜清掃して初期塵芥を除去することがなされている。しかしながら、放水路は数ｋｍ以上に及ぶ長大な施設であるため、これらの放水路を完全にドライ化し、全体を清掃するためには、莫大な維持管理費用が必要となる。また、放水路の内部を清掃するためには、清掃員が放水路内部に立ち入らなければならないが、このような放水路内部での清掃は酸欠などの危険を伴う。さらに、放水路に清掃用の散水栓や照明灯を設置する必要が生じるため、初期の設備費用が増大してしまう。   Conventionally, the spillway has been kept dry to prevent rot and odor due to deterioration of the water quality of the remaining water in the spillway, and to prevent generation of residue or dust (hereinafter also referred to as initial dust as appropriate) at the beginning of rainfall. The initial dust is removed by cleaning as appropriate. However, since the water discharge channels are long facilities extending over several kilometers, enormous maintenance costs are required to completely dry these water discharge channels and clean the whole. In addition, in order to clean the inside of the water discharge channel, the cleaning staff must enter the water discharge channel, but such cleaning inside the water discharge channel is accompanied by danger such as lack of oxygen. Furthermore, since it becomes necessary to install a sprinkler tap and an illuminating lamp for cleaning in the water discharge channel, the initial equipment cost increases.

また、放水路をドライな状態にして清掃する方法に代えて、ポンプ設備の上流側または下流側に沈砂池を設け、初期塵芥をこの沈砂池で沈降させることにより、吐出側への放出を防止することもなされている。このような沈砂池で初期塵芥を沈降させるためには、沈砂池での水の流速を低くして、初期塵芥を確実に沈降させる必要がある。   Also, instead of cleaning the drainage channel in a dry state, a sedimentation basin is provided on the upstream or downstream side of the pump equipment, and the initial dust is settled in this sedimentation basin to prevent discharge to the discharge side. It has also been done. In order to settle the initial dust in such a sand basin, it is necessary to lower the flow rate of water in the sand basin and to reliably settle the initial dust.

しかしながら、放水路を有する地下排水ポンプ設備は、数ｋｍ以上に及ぶ範囲の下水や雨水を集約し排水するものであり、ポンプ設備の容量（排水量）も必然的に大きいものとなる。このように、ポンプ設備の排水量が多くなるため、上述した沈砂池において初期塵芥の沈降流速を抑制するためには、非常に大きな容積の沈砂池が必要となる。このため、沈砂池のための敷地の確保やその土木建築にかかる費用が過大となってしまう。また、初期塵芥は比較的軽いものが多く、沈砂池において完全に沈降させることが難しいため、初期塵芥の一部が吐出側へ放出されることもある。   However, an underground drainage pump facility having a discharge channel collects and drains sewage and rainwater in a range of several kilometers or more, and the capacity (drainage amount) of the pump facility is inevitably large. As described above, since the amount of drainage of the pump facility increases, in order to suppress the sedimentation flow rate of the initial dust in the above-described sand basin, a sand basin having a very large volume is required. For this reason, the cost for securing the site for the sand basin and the civil engineering construction becomes excessive. In addition, many of the initial dusts are relatively light, and it is difficult to completely settle in the sand basin, so that part of the initial dusts may be discharged to the discharge side.

上記問題点を解決するため、本件出願人は、先に、特開２００７−８５０６５号公報（特許文献１）において、汚水と雨水とが合流した下水を集水する吸水槽と、揚水ポンプにより汲み上げられた前記吸水槽内の下水を貯水し、下流側の放流設備に流す吐水槽と、前記揚水ポンプの運転の初期段階で汲み上げられるし渣もしくは塵芥を含む下水を前記吐水槽内の下水とは分離して貯水する分離槽とを備えた合流式下水道におけるポンプ場システムを提案している。このポンプ場システムにおいては、揚水ポンプと吐水槽と分離槽とを相互に連通させる連通管を設け、連通管に開閉弁等の弁類を配置している。   In order to solve the above-mentioned problems, the applicant of the present application previously disclosed in Japanese Patent Application Laid-Open No. 2007-85065 (Patent Document 1), a water absorption tank for collecting sewage combined with sewage and rainwater, and a pumping pump. A sewage tank that stores sewage in the water absorption tank and flows to a discharge facility on the downstream side, and sewage that is pumped up at an initial stage of operation of the pump and contains sewage or dust, A pumping station system in a combined sewer system with a separation tank for separating and storing water is proposed. In this pump station system, a communication pipe that allows the pump, the water discharge tank, and the separation tank to communicate with each other is provided, and valves such as an open / close valve are disposed in the communication pipe.

特開２００７−８５０６５号公報JP 2007-85065 A

特許文献１に開示されたポンプ場システムにおいては、揚水ポンプの運転の初期段階で汲み上げられたし渣もしくは塵芥（初期塵芥）は揚水ポンプ、連通管および弁類を通過するため、これらポンプ、連通管および弁類等の各機器類を閉塞させる虞があり、また各機器類の内面塗装の損傷や剥離を生じさせる虞があった。
本発明は、上述の事情に鑑みなされたもので、汚水と雨水とを集めて処理する合流式下水道や地下放水路を使用した排水システムにおいて、降雨の初期段階でポンプ設備に流れ込む初期塵芥を吸込水槽の底部に設けた初期塵芥貯槽に貯留することができるので、これらの初期塵芥を吐出側河川に排出することなく適切に処理することが可能となり、また初期塵芥が排水ポンプに流入することがないため、ポンプ、配管、弁類等の各機器類の閉塞や損傷を防止することができる地下排水ポンプ設備を提供することを目的とする。 In the pumping station system disclosed in Patent Document 1, the residue or dust (initial dust) pumped up in the initial stage of the operation of the pump is passed through the pump, communication pipes and valves. There is a risk of blocking each device such as pipes and valves, and there is a risk of causing damage or peeling of the inner surface coating of each device.
The present invention has been made in view of the above circumstances, and in a drainage system using a combined sewer or underground drainage that collects and treats sewage and rainwater, sucks the initial dust flowing into the pump facility at the initial stage of rainfall. Since it can be stored in the initial dust storage tank provided at the bottom of the water tank, these initial dusts can be appropriately treated without being discharged to the discharge river, and the initial dust can flow into the drainage pump. Therefore, an object of the present invention is to provide an underground drainage pump facility that can prevent blockage and damage of each device such as a pump, piping, and valves.

上述の目的を達成するため、本発明の地下排水ポンプ設備は、流入水路からの流入水を受け入れる吸込水槽と該吸込水槽内の水を揚水する排水ポンプとを備えた地下排水ポンプ設備において、前記吸込水槽の底部に、降雨の初期段階で前記流入水路から前記吸込水槽に流れ込むし渣もしくは塵芥を含む流入水を貯留する初期塵芥貯槽を設けたことを特徴とする。
本発明によれば、汚水と雨水とを集めて処理する合流式下水道や地下放水路を使用した排水システムにおいて、降雨の初期段階にポンプ設備に流れ込む初期塵芥を吸込水槽の底部に設けた初期塵芥貯槽に貯留することができるので、これらの初期塵芥を吐出側河川に排出することなく適切に処理することが可能となり、環境性に優れた地下排水ポンプ設備を構築することが可能となる。 In order to achieve the above-described object, the underground drainage pump facility of the present invention is an underground drainage pump facility comprising a suction water tank that receives inflow water from an inflow water channel and a drainage pump that pumps water in the suction water tank. The bottom of the suction water tank is provided with an initial dust storage tank for storing inflow water including residue or dust flowing into the suction water tank from the inflow water channel at an initial stage of rainfall.
According to the present invention, in a drainage system using a combined sewer or underground discharge channel that collects and treats sewage and rainwater, the initial dust that flows into the pump facility at the initial stage of rainfall is provided at the bottom of the suction tank. Since it can be stored in the storage tank, it is possible to appropriately process these initial dusts without discharging them to the discharge-side river, and it is possible to construct an underground drainage pump facility with excellent environmental performance.

本発明の一態様は、前記初期塵芥貯槽は、前記吸込水槽の底面を規定する底版（底盤もしくは底板ともいう）の下方に設置されていることを特徴とする。
本発明によれば、吸込水槽の底面を構成する底版の下方に初期塵芥貯槽を設けている。初期塵芥貯槽は、吸込水槽の底壁、両側壁および底版とによって形成された略直方体状の貯留空間を有しており、初期塵芥を含む流入水の所定量を貯留可能としている。 One aspect of the present invention is characterized in that the initial dust storage tank is installed below a bottom plate (also referred to as a bottom plate or a bottom plate) that defines a bottom surface of the suction water tank.
According to the present invention, the initial dust storage tank is provided below the bottom plate constituting the bottom surface of the suction water tank. The initial dust storage tank has a substantially rectangular parallelepiped storage space formed by the bottom wall, both side walls, and the bottom plate of the suction water tank, and can store a predetermined amount of inflow water including the initial dust.

本発明の一態様は、前記流入水路を形成した前記吸込水槽の前壁と、前記吸込水槽の底版の前面との間に、前記流入水路からの流入水を前記初期塵芥貯槽に導入するための導入路として機能する開口部を設けたことを特徴とする。
本発明によれば、吸込水槽の前壁と吸込水槽の底版の前面との間に、開口部が形成されており、この開口部は、流入水路から流入する初期塵芥を含む流入水を初期塵芥貯槽内に導入するための導入路として機能する。 One aspect of the present invention is for introducing inflow water from the inflow water channel into the initial dust storage tank between a front wall of the suction water tank in which the inflow water channel is formed and a front surface of a bottom plate of the suction water tank. An opening functioning as an introduction path is provided.
According to the present invention, the opening is formed between the front wall of the suction water tank and the front surface of the bottom plate of the suction water tank, and this opening allows the inflow water including the initial dust flowing in from the inflow water channel to receive the initial dust. Functions as an introduction path for introduction into the storage tank.

本発明の一態様は、前記吸込水槽の底版の前面に、下方に延びる垂下部を設け、前記初期塵芥貯槽に流入したし渣もしくは塵芥が前記吸込水槽へ浮遊や逆流しないようにしたことを特徴とする。
本発明によれば、吸込水槽の底版の前面に、下方に延びる垂下部を設けている。底版の垂下部は、初期塵芥貯槽内に浮遊する初期塵芥が吸込水槽に戻らないようにするための逆流防止手段として機能する。 One aspect of the present invention is characterized in that a drooping portion extending downward is provided on the front surface of the bottom plate of the suction water tank so that the residue or dust that flows into the initial dust storage tank does not float or flow backward to the suction water tank. And
According to the present invention, the drooping portion extending downward is provided on the front surface of the bottom plate of the suction water tank. The drooping portion of the bottom plate functions as a backflow preventing means for preventing the initial dust floating in the initial dust storage tank from returning to the suction water tank.

本発明の一態様は、前記初期塵芥貯槽に隣接して、前記初期塵芥貯槽に貯留されたし渣もしくは塵芥を含む流入水の一部を回収するための残水排水槽を設置したことを特徴とする。
本発明によれば、初期塵芥貯槽に隣接して、初期塵芥貯槽内に貯留された初期塵芥を含む水を回収して排出するための残水排水槽を設置している。そのため、初期塵芥を含む流入水を残水排水槽から処理施設へ排出することができ、初期塵芥を吐出側河川に排出することなく適切に処理を行うことが可能となる。 One aspect of the present invention is characterized in that a residual water drainage tank is provided adjacent to the initial dust storage tank for recovering a part of the inflowing water containing residue or dust stored in the initial dust storage tank. And
According to this invention, the residual water drainage tank for collect | recovering and discharging the water containing the initial dust stored in the initial dust storage tank is installed adjacent to the initial dust storage tank. Therefore, the inflow water including the initial dust can be discharged from the residual water drainage tank to the treatment facility, and the appropriate treatment can be performed without discharging the initial dust to the discharge-side river.

本発明の一態様は、前記残水排水槽に、該残水排水槽内に回収された流入水を排出するための残水排水ポンプを設けたことを特徴とする。
本発明によれば、残水排水槽内には残水排水ポンプが設置されているため、残水排水ポンプにより残水排水槽内に回収された初期塵芥を含む水を処理施設へ排出することができる。残水は処理施設にて適切に処理される。 One aspect of the present invention is characterized in that the residual water drainage tank is provided with a residual water drainage pump for discharging the inflow water collected in the residual water drainage tank.
According to the present invention, since the residual water drainage pump is installed in the residual water drainage tank, the water containing the initial waste collected in the residual water drainage tank by the residual water drainage pump is discharged to the treatment facility. Can do. Residual water is properly treated at the treatment facility.

本発明の一態様は、前記初期塵芥貯槽内に散水して清掃する散水栓設備を設けたことを特徴とする。
本発明によれば、初期塵芥貯槽内の残水および残水排水槽内に残留する塵芥を排出した後に、散水栓設備を作動させ、初期塵芥貯槽内に残ったゴミや泥などを清掃することができる。すなわち、散水ポンプから散水用の水を散水配管を介して各散水栓に給水し、各散水栓から水を噴出し、初期塵芥貯槽内を清掃することで異臭を防止することができる。 One aspect of the present invention is characterized by providing a sprinkler faucet for sprinkling and cleaning the initial dust storage tank.
According to the present invention, after discharging the residual water in the initial dust storage tank and the dust remaining in the residual water drainage tank, the water spigot equipment is operated to clean the dust and mud remaining in the initial dust storage tank. Can do. That is, it is possible to prevent a strange odor by supplying water for watering from the watering pump to each watering faucet through the watering pipe, ejecting water from each watering faucet, and cleaning the inside of the initial dust storage tank.

本発明の一態様は、前記初期塵芥貯槽の底面は、前記残水排水槽に向かって下り勾配になっていることを特徴とする。
本発明によれば、初期塵芥貯槽内と残水排水槽とは開口によって連通しており、また、初期塵芥貯槽の底面は、初期塵芥貯槽側から残水排水槽側に向かって下り勾配になっている。残水排水槽の底面は初期塵芥貯槽の底面より下方に位置しているため、残水排水槽内に初期塵芥貯槽から流入した初期塵芥を含む水を効果的に回収することができる。 One aspect of the present invention is characterized in that the bottom surface of the initial dust storage tank has a downward slope toward the residual water drainage tank.
According to the present invention, the inside of the initial dust storage tank and the residual water drainage tank communicate with each other through the opening, and the bottom surface of the initial dust storage tank has a downward slope from the initial dust storage tank side to the residual water drainage tank side. ing. Since the bottom surface of the residual water drainage tank is located below the bottom surface of the initial dust storage tank, the water containing the initial dust flowing from the initial dust storage tank into the residual water drainage tank can be effectively recovered.

本発明のその他の態様は、前記開口部に、前記流入水が落下する際の勢いを弱める複数の減勢板を設けたことを特徴とする。
本発明によれば、開口部の位置において、吸込水槽の前壁および吸込水槽の底版の前面に、上下方向に多段状に複数の減勢板が設置されている。複数の減勢板は、流入水路から落下する流入水が蛇行して下方に流れるように配置される。このように、流入水路から落下した流入水が蛇行して下方に流れるため、流入水路から初期塵芥貯槽へ落下する際の水の勢いが減衰され、開口部を形成している箇所の土木構造物への負担を軽減することができる。また、開口部に多段状に複数の減勢板を設けることにより、初期塵芥貯槽から吸込水槽への初期塵芥の浮遊や逆流を抑制できる。 Another aspect of the present invention is characterized in that the opening is provided with a plurality of depressing plates that weaken the momentum when the inflowing water drops.
According to the present invention, at the position of the opening, a plurality of force-reducing plates are installed in a multistage shape in the vertical direction on the front wall of the suction water tank and the front surface of the bottom plate of the suction water tank. The plurality of pressure-reducing plates are arranged so that the inflowing water falling from the inflowing water channel meanders and flows downward. In this way, since the inflowing water that has fallen from the inflowing water channel meanders and flows downward, the momentum of the water when falling from the inflowing waterway to the initial dust storage tank is attenuated, and the civil engineering structure at the location forming the opening Can alleviate the burden. In addition, by providing a plurality of pressure reducing plates in a multi-stage shape in the opening, it is possible to suppress floating and backflow of the initial dust from the initial dust storage tank to the suction water tank.

本発明のその他の態様は、前記流入水路を形成した前記吸込水槽の前壁から張り出した張出部と、前記吸込水槽の底版の前面との間に、前記流入水路からの流入水を前記初期塵芥貯槽に導入するための導入路として機能する開口部を設けたことを特徴とする。
本発明によれば、吸込水槽の前壁に、該前壁から底版に向かって張り出す張出部を設け、流入水路からの流入水を前記初期塵芥貯槽に導入するための導入路として機能する開口部を前記張出部と底版の前面との間に設けている。 In another aspect of the present invention, the inflowing water from the inflowing water channel is placed between the overhanging portion protruding from the front wall of the suction water tank that forms the inflowing water channel and the front surface of the bottom plate of the suction water tank. An opening functioning as an introduction path for introduction into a dust storage tank is provided.
According to the present invention, the front wall of the suction water tank is provided with an overhang portion that projects from the front wall toward the bottom plate, and functions as an introduction path for introducing the inflow water from the inflow water path into the initial dust storage tank. An opening is provided between the protruding portion and the front surface of the bottom plate.

本発明の好ましい態様は、前記初期塵芥貯槽と残水排水槽とを連通している開口部分に連通ゲートを設け、吸込水槽の水位により連通ゲートを開閉させることを特徴とする。
本発明によれば、初期塵芥を含む流入水が流入する場合は、連通ゲートを開とし、初期塵芥を含む流入水を残水排水槽に貯留させる。排水ポンプが運転した後に、吸込水槽水位が所定の水位まで下がった場合に、連通ゲートを閉とし、残水排水槽の貯留水が初期塵芥貯槽内の水を吸込水槽側に逆流させることを助長することを防止する。また、常時連通ゲートを閉にして、排水ポンプ停止後、残水排水を行う時に連通ゲートを開としてもよい。 In a preferred aspect of the present invention, a communication gate is provided at an opening portion that communicates the initial dust storage tank and the residual water drainage tank, and the communication gate is opened and closed according to the water level of the suction water tank.
According to the present invention, when inflow water including initial dust flows in, the communication gate is opened, and the inflow water including initial dust is stored in the residual water drainage tank. When the water level in the suction tank drops to the specified level after the drainage pump is operated, the communication gate is closed, and the water stored in the residual water drainage tank helps the water in the initial dust storage tank flow back to the suction tank side. To prevent. Further, the communication gate may be closed at all times and the communication gate may be opened when the residual water is drained after the drainage pump is stopped.

本発明のその他の態様は、前記吸込水槽内の水を揚水する排水ポンプの運転中に、前記残水排水ポンプの運転を開始することを特徴とする。
通常、排水ポンプによる排水終了後（排水ポンプ停止後）、残水排水ポンプの運転を開始するが、本発明によれば、排水ポンプの運転中に残水排水ポンプの運転を開始し、初期塵芥貯槽内の水を早めに排出することにより砂・泥などが初期塵芥貯槽の底面に沈殿することはなくなる。また、排水ポンプの運転中に残水排水ポンプを運転することにより、初めに貯留した一番汚れた初期塵芥を排出することができ、さらに初期塵芥を回収できるようになるため、河川へ排出される水もさらにきれいになる。
また、前記残水排水槽に水位計を設け、前記残水排水槽の水位が所定の水位になったら前記残水排水ポンプを運転させてもよい。 Another aspect of the present invention is characterized in that the operation of the residual water drainage pump is started during the operation of the drainage pump for pumping the water in the suction water tank.
Normally, after the drainage by the drainage pump is finished (after the drainage pump is stopped), the operation of the residual water drainage pump is started, but according to the present invention, the operation of the residual water drainage pump is started during the operation of the drainage pump, and the initial dust By discharging the water in the storage tank early, sand, mud and the like will not settle on the bottom surface of the initial dust storage tank. In addition, by operating the residual water drainage pump during the drainage pump operation, it is possible to discharge the dirtiest initial dust stored first and to collect the initial dust, which is then discharged into the river. The water will be even cleaner.
Moreover, a water level meter may be provided in the residual water drainage tank, and the residual water drainage pump may be operated when the water level of the residual water drainage tank reaches a predetermined water level.

本発明のその他の態様は、前記残水排水ポンプによる前記残水排水槽の排水後に、前記残水排水槽内に残留した塵芥を掻き上げるための塵芥掻き上げ装置を設けたことを特徴する。
本発明によれば、残水排水ポンプにより排水された後に、残水排水ポンプで排水できない大きさの塵芥が残水排水槽内に残留する場合に、塵芥掻き上げ装置を作動させてバケット等により残留した塵芥を掻き上げることができる。また、前記塵芥が残水排水ポンプに流入し、閉塞することを防止するために残水排水ポンプの周囲にスクリーンを設けてもよい。 Another aspect of the present invention is characterized in that a dust scraping device is provided for scraping dust remaining in the residual water drainage tank after draining the residual water drainage tank by the residual water drainage pump.
According to the present invention, when dust having a size that cannot be drained by the residual water drainage pump remains in the residual water drainage tank after being drained by the residual drainage pump, The remaining dust can be scraped up. Further, a screen may be provided around the residual water drainage pump in order to prevent the dust from flowing into the residual water drainage pump and blocking it.

本発明のその他の態様は、前記残水排水ポンプをカッター付又はボルテックス型としたことを特徴とする。
本発明によれば、残水排水ポンプで排出できない大きさの塵芥が流入してきた場合に、残水排水ポンプをカッター付にすることにより塵芥を破砕することができ、また、残水排水ポンプをボルテックス型とすることにより残水排水ポンプと同口径までの塵芥を排出することができるので、残水排水ポンプが閉塞することを防止できる。 Another aspect of the present invention is characterized in that the residual water drainage pump has a cutter or a vortex type.
According to the present invention, when dust of a size that cannot be discharged by the residual water drain pump flows in, the dust can be crushed by attaching the residual water drain pump with a cutter. By using a vortex type, dust up to the same diameter as the residual water drainage pump can be discharged, so that the residual water drainage pump can be prevented from being blocked.

本発明のその他の態様は、前記初期塵芥貯槽と前記残水排水槽を連通させる開口に破砕機を設けたことを特徴とする。
本発明によれば、残水排水ポンプで排出できない大きさの塵芥が流入してきた場合に、破砕機により塵芥を破砕することができるので、残水排水ポンプが閉塞することを防止できる。 Another aspect of the present invention is characterized in that a crusher is provided in an opening for communicating the initial dust storage tank and the residual water drainage tank.
According to the present invention, when dust having a size that cannot be discharged by the residual water drain pump flows in, the dust can be crushed by the crusher, so that the residual water drain pump can be prevented from being blocked.

本発明のその他の態様は、前記初期塵芥貯槽及び吸込水槽に脱臭設備を設けたことを特徴とする。
本発明によれば、初期塵芥貯槽及び吸込水槽に脱臭設備を設けるため、市街地のポンプ設備において、流入水や残水から発生する悪臭の防臭対策ができ、環境性に優れた設備を構築することができる。また、初期塵芥貯槽内の残水を排出した後に、清掃員が初期塵芥貯槽内や吸込水槽内の清掃をする時の酸欠などの対策もできる。 Another aspect of the present invention is characterized in that a deodorizing facility is provided in the initial dust storage tank and the suction water tank.
According to the present invention, since the deodorization equipment is provided in the initial dust storage tank and the suction water tank, it is possible to take measures against deodorization of bad odor generated from inflow water and residual water in the pumping equipment in the urban area, and to construct equipment with excellent environmental characteristics. Can do. Moreover, after discharging the residual water in the initial dust storage tank, it is possible to take measures such as lack of oxygen when the cleaner cleans the initial dust storage tank or the suction water tank.

（１）汚水と雨水とを集めて処理する合流式下水道や地下放水路を使用した排水システムにおいて、初期放水時にポンプ場に流れ込む初期塵芥を吸込水槽の底部に設けた初期塵芥貯槽に分別して貯留することができ、これらの初期塵芥を吐出側河川に排出することなく適切に処理を行うことが可能となり、環境性に優れた設備を構築することが可能となる。
（２）初期塵芥が排水ポンプに流入することがなくポンプ、配管、弁類等の各機器類の閉塞や損傷を防止することができ、各機器類の長寿命化を図ることができ、また設備運用上の信頼性も向上する。
（３）吸込水槽の底部に初期塵芥貯槽を設けるだけで済み、従来技術（例えば、特許文献１）のように、吐水槽や分離槽を設ける必要がなく、さらに沈砂池も設ける必要がなく、従来の排水ポンプ設備より平面上のスペース拡大を行う必要がなく、経済性にも優れた設備を提供することが可能となる。したがって、敷地スペースに制限がある市街地のポンプ設備に最適である。 (1) In a drainage system using a combined sewer or underground drainage that collects and treats sewage and rainwater, the initial dust that flows into the pumping station at the time of initial water discharge is separated and stored in an initial dust storage tank provided at the bottom of the suction water tank. Therefore, it is possible to appropriately process these initial dusts without discharging them to the discharge-side river, and it is possible to construct facilities with excellent environmental performance.
(2) The initial dust does not flow into the drainage pump, and it is possible to prevent clogging or damage of each device such as pumps, piping, valves, etc., and to extend the life of each device. Equipment operational reliability is also improved.
(3) It is only necessary to provide an initial dust storage tank at the bottom of the suction water tank, and there is no need to provide a water discharge tank or a separation tank as in the prior art (for example, Patent Document 1), and there is no need to provide a sand basin. It is not necessary to expand the space on the plane as compared with the conventional drainage pump equipment, and it is possible to provide equipment with excellent economic efficiency. Therefore, it is most suitable for pumping facilities in urban areas where the site space is limited.

図１は、本発明の地下排水ポンプ設備の第１の実施形態を示す模式的断面図である。Drawing 1 is a typical sectional view showing a 1st embodiment of underground drainage pump equipment of the present invention. 図２は、図１に示す地下排水ポンプ設備の平面図である。FIG. 2 is a plan view of the underground drainage pump facility shown in FIG. 図３は、図２のIII−III線断面図である。3 is a cross-sectional view taken along line III-III in FIG. 図４は、本発明の地下排水ポンプ設備の第２の実施形態を示す模式的断面図である。FIG. 4 is a schematic cross-sectional view showing a second embodiment of the underground drainage pump facility of the present invention. 図５（ａ），（ｂ），（ｃ）は、図１乃至図３に示す地下排水ポンプ設備における初期放水時の水の流れを示す模式的断面図である。5A, 5B, and 5C are schematic cross-sectional views showing the flow of water at the time of initial water discharge in the underground drainage pump facility shown in FIGS. 図６（ａ），（ｂ）は、排水ポンプによる排水運転終了時の吸込水槽の状態を示す模式的断面図である。6 (a) and 6 (b) are schematic cross-sectional views showing the state of the suction water tank at the end of the drainage operation by the drainage pump. 図７（ａ）〜（ｄ）は、流入水路から初期塵芥貯槽内に初期塵芥を含む流入水を導入するための導入路として機能する開口部の変形例を示す図である。FIGS. 7A to 7D are views showing modifications of the opening functioning as an introduction path for introducing the inflow water containing the initial dust from the inflow water path into the initial dust storage tank. 図８は、流入水路から初期塵芥貯槽内に初期塵芥を含む流入水を導入するための開口部に減勢板を設けた実施形態を示す模式的断面図である。FIG. 8 is a schematic cross-sectional view showing an embodiment in which a reducing plate is provided in an opening for introducing inflow water containing initial dust from the inflow water channel into the initial dust storage tank. 図９（ａ），（ｂ）は、本発明の地下排水ポンプ設備に適用される排水ポンプの一例を示す図であり、図９（ａ）は図１に示す第１の実施形態に適用される排水ポンプを示す模式的断面図であり、図９（ｂ）は図４に示す第２の実施形態に適用される排水ポンプを示す模式的断面図である。FIGS. 9A and 9B are diagrams showing an example of a drainage pump applied to the underground drainage pump facility of the present invention, and FIG. 9A is applied to the first embodiment shown in FIG. FIG. 9B is a schematic cross-sectional view showing a drainage pump applied to the second embodiment shown in FIG. 4. 図１０は、地下放水路を使用した排水システムを示す図である。FIG. 10 is a diagram showing a drainage system using an underground discharge channel.

以下、本発明に係る地下排水ポンプ設備の実施形態を図１乃至図９を参照して説明する。図１乃至図９において、同一または相当する構成要素には、同一の符号を付して重複した説明を省略する。
図１は、本発明の地下排水ポンプ設備１の第１の実施形態を示す模式的断面図である。図２は、図１に示す地下排水ポンプ設備１の平面図である。図１および図２に示すように、地下排水ポンプ設備１は、家庭や工場から排出される汚水と降雨による雨水とが合流した下水や大雨の時に立坑から地下放水路に供給された雨水を集水する吸込水槽２を備えている。吸込水槽２の前壁２ｆｗには、下水管や地下放水路等の流入水路２０が接続されており、この流入水路２０を通って下水や雨水が吸込水槽２の内部に流入するようになっている。 Hereinafter, an embodiment of an underground drainage pump facility according to the present invention will be described with reference to FIGS. 1 to 9. 1 to 9, the same or corresponding components are denoted by the same reference numerals, and redundant description is omitted.
Drawing 1 is a typical sectional view showing a 1st embodiment of underground drainage pump equipment 1 of the present invention. FIG. 2 is a plan view of the underground drainage pump facility 1 shown in FIG. As shown in FIGS. 1 and 2, the underground drainage pump facility 1 collects sewage from which sewage discharged from homes and factories and rainwater from rainwater merge, and rainwater supplied from a shaft to an underground discharge channel during heavy rain. A suction tank 2 for water is provided. An inflow water channel 20 such as a sewer pipe or an underground drainage channel is connected to the front wall 2 fw of the suction water tank 2, and sewage and rainwater flow into the suction water tank 2 through the inflow water channel 20. Yes.

図１および図２に示すように、吸込水槽２の底部には、初期放水時（ポンプ場への流入時）に流れ込む初期塵芥を含む流入水を貯留する初期塵芥貯槽３が設けられている。初期塵芥貯槽３は、吸込水槽２の底壁２ｂｗ、吸込水槽２の両側壁２ｓｗ，２ｓｗおよび吸込水槽２の底版２ａとによって形成された略直方体状の貯留空間を有しており、初期塵芥を含む流入水を所定量貯留可能になっている。吸込水槽２の前壁２ｆｗと吸込水槽２の底版２ａとの間には、開口部４が形成されており、この開口部４は、流入水路２０から流入する初期塵芥を含む流入水を初期塵芥貯槽３内に導入するための導入路として機能する。開口部４は吸込水槽２の両側壁２ｓｗ，２ｓｗ間の全幅に亘っている（図２参照）。   As shown in FIGS. 1 and 2, the bottom of the suction water tank 2 is provided with an initial dust storage tank 3 for storing inflow water including initial dust flowing in at the time of initial water discharge (when flowing into the pump station). The initial refuse storage tank 3 has a substantially rectangular parallelepiped storage space formed by the bottom wall 2bw of the suction water tank 2, the side walls 2sw, 2sw of the suction water tank 2, and the bottom plate 2a of the suction water tank 2. A predetermined amount of inflowing water can be stored. An opening 4 is formed between the front wall 2fw of the suction water tank 2 and the bottom slab 2a of the suction water tank 2, and this opening 4 allows the inflow water including the initial dust flowing in from the inflow water channel 20 to flow into the initial dust. It functions as an introduction path for introduction into the storage tank 3. The opening 4 extends over the entire width between the side walls 2sw and 2sw of the suction water tank 2 (see FIG. 2).

図１に示すように、吸込水槽２の底版２ａは、吸込水槽２の前壁側から後壁側に向かって延びる水平部２ａｈと、水平部２ａｈの後端から斜め下方に延びて吸込水槽２の底壁２ｂｗに接続される傾斜部２ａｓと、水平部２ａｈの前端から下方に延びる垂下部２ａｄとから構成されている。そして、垂下部２ａｄの下面と底壁２ｂｗとの間の流入口３ＩＮより、初期塵芥を含む流入水が初期塵芥貯槽３に流入するようになっている。底版２ａの傾斜部２ａｓは、底壁２ｂｗより盛り上がったマウンドになっている。底版２ａの垂下部２ａｄは、初期塵芥貯槽３内で浮遊する初期塵芥が吸込水槽２に戻らないようにするための逆流防止手段として機能する。図示例では、垂下部２ａｄは、底版２ａと一体の土木構造として形成されているが、鋼板などで別途形成してもよい。 As shown in FIG. 1, the bottom slab 2 a of the suction water tank 2 includes a horizontal part 2 ah extending from the front wall side to the rear wall side of the suction water tank 2, and a suction water tank 2 extending obliquely downward from the rear end of the horizontal part 2 ah. It is comprised from the inclination part 2as connected to bottom wall 2bw of this, and the drooping part 2ad extended below from the front end of the horizontal part 2ah. Then, from the inlet 3 IN between the lower surface of the hanging portion 2ad and the bottom wall 2bw, flowing water containing an initial dust is adapted to flow into the initial dust tank 3. The inclined portion 2as of the bottom plate 2a is a mound raised from the bottom wall 2bw. The hanging part 2ad of the bottom plate 2a functions as a backflow prevention means for preventing the initial dust floating in the initial dust storage tank 3 from returning to the suction water tank 2. In the illustrated example, the drooping portion 2ad is formed as a civil structure integrated with the bottom plate 2a, but may be separately formed with a steel plate or the like.

初期塵芥貯槽３に隣接して残水排水槽５が設置されている。残水排水槽５は、初期塵芥貯槽３内に貯留された初期塵芥を含む水を回収して排出するための排水槽である。図２に示すように、初期塵芥貯槽３と残水排水槽５とは開口５ａによって連通している。そして、初期塵芥貯槽３の底面（底壁２ｂｗの上面）は、初期塵芥貯槽３側から残水排水槽５側に向かって下り勾配になっており、初期塵芥貯槽３内に貯留された初期塵芥を含む水は、初期塵芥貯槽３の底面の下り勾配によって残水排水槽５内に効果的に流入するようになっている。   A residual water drainage tank 5 is installed adjacent to the initial dust storage tank 3. The residual water drain tank 5 is a drain tank for collecting and discharging water containing the initial dust stored in the initial dust storage tank 3. As shown in FIG. 2, the initial dust storage tank 3 and the residual water drain tank 5 are communicated with each other through an opening 5a. The bottom surface of the initial dust storage tank 3 (the upper surface of the bottom wall 2bw) has a downward slope from the initial dust storage tank 3 side to the residual water drainage tank 5 side, and the initial dust stored in the initial dust storage tank 3 The water containing the water effectively flows into the residual water drainage tank 5 due to the downward slope of the bottom surface of the initial dust storage tank 3.

図３は、図２のIII−III線断面図である。図３に示すように、初期塵芥貯槽３内と残水排水槽５とは開口５ａによって連通しており、また、初期塵芥貯槽３の底面（底壁２ｂｗの上面）は、矢印で示すように、初期塵芥貯槽３側から残水排水槽５側に向かって下り勾配になっている。残水排水槽５の底面５ｂは初期塵芥貯槽３の底面（底壁２ｂｗの上面）より下方に位置しており、残水排水槽５内に、初期塵芥貯槽３から流入した初期塵芥を含む水を効果的に回収できるようになっている。残水排水槽５内には複数台の残水排水ポンプ６が設置されており、残水排水ポンプ６により残水排水槽５内に貯留された初期塵芥を含む水を処理施設へ排出できるようになっている。また、残水排水ポンプ６により排出された後に、残水排水ポンプ６で排出できない大きさの塵芥が残水排水槽５内に残留する場合がある。そのため、残水排水ポンプ６で排出できない大きさの塵芥を取り出すために、残水排水槽５の上部にはバケットなどの塵芥掻き上げ装置３１が設置されていてもよい。   3 is a cross-sectional view taken along line III-III in FIG. As shown in FIG. 3, the inside of the initial dust storage tank 3 and the residual water drainage tank 5 communicate with each other through an opening 5 a, and the bottom surface (the upper surface of the bottom wall 2 bw) of the initial dust storage tank 3 is indicated by an arrow. The slope is descending from the initial dust storage tank 3 side toward the residual water drainage tank 5 side. The bottom surface 5b of the residual water drainage tank 5 is located below the bottom surface of the initial dust storage tank 3 (the upper surface of the bottom wall 2bw), and the residual water drainage tank 5 contains water containing the initial dust flowing from the initial dust storage tank 3. Can be collected effectively. A plurality of residual water drainage pumps 6 are installed in the residual water drainage tank 5 so that water including the initial dust stored in the residual water drainage tank 5 can be discharged to the treatment facility by the residual water drainage pump 6. It has become. In addition, after being discharged by the residual water drainage pump 6, there may be cases where dust having a size that cannot be discharged by the residual water drainage pump 6 remains in the residual water drainage tank 5. Therefore, in order to take out dust having a size that cannot be discharged by the residual water drainage pump 6, a dust scraping device 31 such as a bucket may be installed on the upper part of the residual water drainage tank 5.

図１および図２に示すように、残水排水ポンプ６により初期塵芥貯槽３内の残水排水を行った後、残ったゴミや泥などを清掃できるように、初期塵芥貯槽３内には散水栓設備７が設置されている。散水栓設備７は、初期塵芥貯槽３内の各所に配置された散水栓８を備えており、各散水栓８には、散水ポンプ（図示せず）および散水ポンプに接続された散水配管１０を介して散水用の水が供給されるようになっている。なお、吸込水槽２にも散水栓設備７を設け、吸込水槽２内に残ったゴミや泥などを清掃できるようにしてもよい。   As shown in FIGS. 1 and 2, after the residual water drainage in the initial dust storage tank 3 is drained by the residual water drainage pump 6, water is sprayed in the initial dust storage tank 3 so that the remaining dust and mud can be cleaned. A plug facility 7 is installed. The water sprinkler equipment 7 includes water spigots 8 arranged at various locations in the initial dust storage tank 3, and each water spigot 8 has a water sprinkler pump (not shown) and a sprinkler pipe 10 connected to the sprinkler pump. The water for watering is supplied through. The suction water tank 2 may also be provided with a sprinkler faucet 7 so that dust, mud, etc. remaining in the suction water tank 2 can be cleaned.

吸込水槽２の下部には、排水ポンプ１１の吸込管１２が設けられている。吸込管１２は吸込水槽２の後壁２ｒｗを貫通してポンプ室内に延びている。排水ポンプ１１は立軸渦巻斜流ポンプ（後述する）から構成されているが、ポンプの型式には特定されない。排水ポンプ１１の吐出管１３は、吐出側河川まで延びており、吐出管１３には逆止弁Ｖｃおよび吐出弁Ｖｄが設けられている。排水ポンプ１１は、ディーゼルエンジン、ガスタービン、電動機などの駆動装置１４に連結されており、必要に応じギア１５を備えている。排水ポンプ１１は２台以上複数台設置されている。   A suction pipe 12 of a drainage pump 11 is provided at the lower part of the suction water tank 2. The suction pipe 12 extends through the rear wall 2rw of the suction water tank 2 into the pump chamber. The drainage pump 11 is composed of a vertical-axis spiral mixed flow pump (described later), but is not specified in the type of the pump. The discharge pipe 13 of the drainage pump 11 extends to the discharge side river, and the discharge pipe 13 is provided with a check valve Vc and a discharge valve Vd. The drainage pump 11 is connected to a drive device 14 such as a diesel engine, a gas turbine, or an electric motor, and includes a gear 15 as necessary. Two or more drainage pumps 11 are installed.

図４は、本発明の地下排水ポンプ設備１の第２の実施形態を示す模式的断面図である。第２の実施形態の地下排水ポンプ設備１の平面図は、図２と同様とであるため、図示を省略する。図４に示す実施形態においては、吸込水槽２の底部にある底版２ａは、傾斜部を有さず、水平部のみから構成されている。すなわち、吸込水槽２の底版２ａは、吸込水槽２の前壁側から後壁側に向かって水平に延び、吸込水槽２の後壁２ｒｗに接続されている。図１に示す実施形態と同様に、底版２ａの下方に初期塵芥貯槽３が設けられている。初期塵芥貯槽３は、初期塵芥貯槽３の底壁２ｂｗ、吸込水槽２の両側壁２ｓｗ，２ｓｗ（図２参照）、吸込水槽２の底版２ａおよび吸込水槽２の後壁２ｒｗとによって直方体状の貯留空間を有している。   FIG. 4 is a schematic cross-sectional view showing a second embodiment of the underground drainage pump facility 1 of the present invention. The plan view of the underground drainage pump facility 1 of the second embodiment is the same as that of FIG. In the embodiment shown in FIG. 4, the bottom slab 2 a at the bottom of the suction water tank 2 does not have an inclined part and is composed only of a horizontal part. That is, the bottom plate 2 a of the suction water tank 2 extends horizontally from the front wall side of the suction water tank 2 toward the rear wall side, and is connected to the rear wall 2 rw of the suction water tank 2. Similar to the embodiment shown in FIG. 1, an initial dust storage tank 3 is provided below the bottom plate 2a. The initial dust storage tank 3 is a rectangular parallelepiped storage by a bottom wall 2bw of the initial dust storage tank 3, both side walls 2sw and 2sw (see FIG. 2) of the suction water tank 2, a bottom plate 2a of the suction water tank 2, and a rear wall 2rw of the suction water tank 2. Has a space.

また、吸込水槽２内には、排水ポンプ１１が設置されている。排水ポンプ１１は立軸斜流ポンプ（後述する）から構成されているが、ポンプの型式には特定されない。排水ポンプ１１の吐出管１３は、吐出側河川まで延びており、吐出管１３には吐出弁Ｖｄが設けられている。このように、本実施形態においては、吸込水槽２の底版２ａにマウンドがなく、またポンプ型式が第１の実施形態のものと異なっているが、その他の構成は第１実施形態と同様である。   A drainage pump 11 is installed in the suction water tank 2. The drainage pump 11 is constituted by a vertical shaft mixed flow pump (described later), but is not specified by the type of the pump. The discharge pipe 13 of the drainage pump 11 extends to the discharge-side river, and the discharge pipe 13 is provided with a discharge valve Vd. Thus, in this embodiment, the bottom plate 2a of the suction water tank 2 has no mound, and the pump type is different from that of the first embodiment, but the other configurations are the same as those of the first embodiment. .

図５（ａ），（ｂ），（ｃ）は、図１乃至図３に示す地下排水ポンプ設備１における初期段階における水の流れを示す模式的断面図である。
図５（ａ）に示すように、降雨が始まった初期段階において、初期塵芥を含む水を流入水路２０を介して吸込水槽２内に流入させる。吸込水槽２の底部には初期塵芥貯槽３が設置されているため、流入水路２０から流入した初期塵芥を含む水は、導入路として機能する開口部４を介して初期塵芥貯槽３に流入する。初期塵芥は初期塵芥貯槽３の奥側へ流されて初期塵芥貯槽３内に貯留され、この間に初期塵芥貯槽３内の液面ＷＬは次第に上昇する。
図５（ｂ）に示すように、初期塵芥貯槽３内の液面ＷＬが底版２ａの垂下部２ａｄの下面よりも上昇すると、初期塵芥は初期塵芥貯槽３内に滞留する。そして、流入水路２０から初期塵芥除去後の水が吸込水槽２に流入する。
図５（ｃ）に示すように、初期塵芥除去後の水が吸込水槽２内に所定量貯まると、排水ポンプ１１を起動して吸込水槽２内の水を河川に排水する。排水ポンプ１１の運転中、初期塵芥は初期塵芥貯槽３内に滞留し続ける。このとき、底版２ａの垂下部２ａｄは、初期塵芥貯槽３内で浮遊する初期塵芥が吸込水槽２に移動しないようにするための手段として機能する。 FIGS. 5A, 5B, and 5C are schematic cross-sectional views showing the flow of water in the initial stage of the underground drainage pump facility 1 shown in FIGS.
As shown in FIG. 5 (a), in the initial stage when the rain has started, water including the initial dust is caused to flow into the suction water tank 2 through the inflow water channel 20. Since the initial dust storage tank 3 is installed at the bottom of the suction water tank 2, the water containing the initial dust flowing in from the inflow water channel 20 flows into the initial dust storage tank 3 through the opening 4 functioning as an introduction channel. The initial dust is flowed to the inner side of the initial dust storage tank 3 and stored in the initial dust storage tank 3, and the liquid level WL in the initial dust storage tank 3 gradually rises during this time.
As shown in FIG. 5B, when the liquid level WL in the initial dust storage tank 3 rises from the lower surface of the hanging part 2ad of the bottom plate 2a, the initial dust stays in the initial dust storage tank 3. Then, the water after the initial dust removal flows from the inflow water channel 20 into the suction water tank 2.
As shown in FIG. 5C, when a predetermined amount of water after the initial dust removal is stored in the suction water tank 2, the drain pump 11 is activated to drain the water in the suction water tank 2 into the river. During operation of the drainage pump 11, the initial dust continues to stay in the initial dust storage tank 3. At this time, the hanging part 2ad of the bottom plate 2a functions as a means for preventing the initial dust floating in the initial dust storage tank 3 from moving to the suction water tank 2.

図６（ａ），（ｂ）は、排水ポンプ１１による排水運転終了時における吸込水槽２の状態を示す模式的断面図である。
排水ポンプ１１の排水運転では、吸込水槽２内の水を全て排水できるわけではないので、図６（ａ）に示すように、吸込水槽２内には所定量の水が残る。このとき、初期塵芥は初期塵芥貯槽３内に滞留する。
そこで、図６（ｂ）に示すように、残水排水槽５内の残水排水ポンプ６を運転し、初期塵芥を含む残水を排出する。残水排水ポンプ６によって、残水は処理施設へ排出され、処理施設にて適切に処理される。したがって、初期塵芥貯槽３内の初期塵芥を含む残水は、初期塵芥貯槽３の底面の下り勾配によって残水排水槽５に効果的に流入して排出され、初期塵芥貯槽３内の液面ＷＬは次第に低下していき、吸込水槽２および初期塵芥貯槽３内の残水を完全に排出して、吸込水槽２および初期塵芥貯槽３内をドライ状態にできる。 FIGS. 6A and 6B are schematic cross-sectional views showing the state of the suction water tank 2 at the end of the drainage operation by the drainage pump 11.
In the drainage operation of the drainage pump 11, not all the water in the suction water tank 2 can be drained, so that a predetermined amount of water remains in the suction water tank 2 as shown in FIG. At this time, the initial dust stays in the initial dust storage tank 3.
Therefore, as shown in FIG. 6B, the residual water drainage pump 6 in the residual water drainage tank 5 is operated to discharge the residual water including the initial dust. Residual water is discharged to the treatment facility by the residual water drainage pump 6 and appropriately treated in the treatment facility. Therefore, the residual water containing the initial dust in the initial dust storage tank 3 is effectively flowed into and discharged from the residual water drainage tank 5 by the downward slope of the bottom surface of the initial dust storage tank 3, and the liquid level WL in the initial dust storage tank 3. Gradually decreases, the remaining water in the suction water tank 2 and the initial dust storage tank 3 is completely discharged, and the suction water tank 2 and the initial dust storage tank 3 can be made dry.

上述したように、通常、排水ポンプ１１による排水終了後（排水ポンプ１１停止後）、残水排水ポンプ６の運転を開始するが、排水ポンプ１１の運転中に残水排水ポンプ６の運転を開始し、初期塵芥貯槽３内の水を早めに排水することにより砂・泥などが初期塵芥貯槽３の底面に沈殿しないようにしてもよい。この場合、残水排水槽５に電極水位計などを設け、残水排水槽５の水位が決められた水位になったら、残水排水ポンプ６を運転する。このように、排水ポンプ１１の運転中に残水排水ポンプ６を運転することにより、初めに貯留した一番汚れた初期塵芥を排出することができ、さらに初期塵芥を回収できるようになり、河川へ排水される水もさらにきれいになる。   As described above, after the drainage by the drainage pump 11 is finished (after the drainage pump 11 is stopped), the operation of the residual water drainage pump 6 is started, but the operation of the residual water drainage pump 6 is started during the operation of the drainage pump 11. The sand in the initial dust storage tank 3 may be prevented from settling on the bottom surface of the initial dust storage tank 3 by draining the water in the initial dust storage tank 3 early. In this case, an electrode water level gauge or the like is provided in the residual water drainage tank 5, and the residual water drainage pump 6 is operated when the water level of the residual water drainage tank 5 reaches a predetermined water level. Thus, by operating the residual water drainage pump 6 while the drainage pump 11 is in operation, the most dirty initial dust stored first can be discharged, and the initial dust can be recovered, and the river The water drained into the water will be even cleaner.

残水排水ポンプ６により排水された後に、残水排水ポンプ６で排水できない大きさの塵芥が残水排水槽５内に残留する場合には、塵芥掻き上げ装置３１を作動させてバケット等により残留した塵芥を掻き上げてもよい。
このようにして、初期塵芥貯槽３内の残水排水および残水排水槽５内に残留する塵芥を排出した後に、散水栓設備７を作動させ、初期塵芥貯槽３内に残ったゴミや泥などを清掃する。すなわち、散水ポンプから散水用の水を散水配管１０を介して各散水栓８に給水し、各散水栓８から水を噴出し、初期塵芥貯槽３内を清掃する。なお、同様に吸込水槽２内に残ったゴミや泥などを清掃するために、吸込水槽２内に散水栓設備７を設置してもよい。 After the wastewater drainage pump 6 drains, if the size of dust that cannot be drained by the residual water drainage pump 6 remains in the residual water drainage tank 5, the dust scraping device 31 is activated and remains in the bucket or the like. You may scrape the dust.
In this way, after draining the residual water drainage in the initial dust storage tank 3 and the dust remaining in the residual water drainage tank 5, the water spigot equipment 7 is operated, and dust, mud, etc. remaining in the initial dust storage tank 3 Clean. That is, water for watering is supplied from the watering pump to each watering tap 8 through the watering pipe 10, and water is ejected from each watering tap 8 to clean the inside of the initial dust storage tank 3. Similarly, a sprinkler faucet 7 may be installed in the suction water tank 2 in order to clean dust and mud remaining in the suction water tank 2.

図７（ａ）〜（ｄ）は、吸込水槽２から初期塵芥貯槽３内に初期塵芥を含む流入水を導入するための導入路として機能する開口部４の変形例を示す図である。
図７（ａ），（ｂ）は開口部の第１の変形例を示す図であり、図７（ａ）は吸込水槽２の一部および開口部４を示す平面図であり、図７（ｂ）は図７（ａ）のＡ−Ａ線断面図である。図７（ａ），（ｂ）に示すように、開口部４は、吸込水槽２の前壁２ｆｗからやや離間した位置に設置される。すなわち、吸込水槽２の前壁２ｆｗには、前壁２ｆｗから底版２ａに向かって張り出す張出部２ｐｒが設けられ、開口部４は張出部２ｐｒと底版２ａの前面との間に設けられる。したがって、開口部４は、吸込水槽２の前壁２ｆｗの直下の位置でなく、吸込水槽２の前壁２ｆｗから離間した位置と吸込水槽２の底版２ａとの間に形成されている。 FIGS. 7A to 7D are views showing a modification of the opening 4 that functions as an introduction path for introducing the inflowing water containing the initial dust from the suction water tank 2 into the initial dust storage tank 3.
FIGS. 7A and 7B are views showing a first modification of the opening, and FIG. 7A is a plan view showing a part of the suction water tank 2 and the opening 4, and FIG. FIG. 7B is a sectional view taken along line AA in FIG. As shown in FIGS. 7A and 7B, the opening 4 is installed at a position slightly separated from the front wall 2 fw of the suction water tank 2. That is, the front wall 2fw of the suction water tank 2 is provided with an overhang portion 2pr that protrudes from the front wall 2fw toward the bottom plate 2a, and the opening 4 is provided between the overhang portion 2pr and the front surface of the bottom plate 2a. . Accordingly, the opening 4 is not formed at a position directly below the front wall 2 fw of the suction water tank 2 but between a position spaced from the front wall 2 fw of the suction water tank 2 and the bottom plate 2 a of the suction water tank 2.

図７（ｃ），（ｄ）は開口部の第２の変形例を示す図であり、図７（ｃ）は吸込水槽２の一部および開口部４を示す平面図であり、図７（ｄ）は図７（ｃ）のＢ−Ｂ線断面図である。図７（ｄ）に示すように、開口部４は、吸込水槽２の前壁２ｆｗと吸込水槽２の底版２ａとの間に形成されており、この構成は図１に示す構成と同様である。開口部４の幅方向に関しては、図２に示す開口部４は吸込水槽２の両側壁２ｓｗ，２ｓｗ間の全幅に亘っているが、図７（ｃ）に示す開口部４は吸込水槽２の両側壁２ｓｗ，２ｓｗ間の中央部に設けられており、吸込水槽２の両側壁２ｓｗ，２ｓｗの近傍には設けられていない。
図７（ａ）〜（ｄ）に示すように、吸込水槽２から初期塵芥貯槽３内に初期塵芥を含む流入水を導入するための導入路として機能する開口部４は、吸込水槽２の前壁２ｆｗから離間した位置に形成してもよく、また吸込水槽２の両側壁２ｓｗ，２ｓｗ間の一部に形成してもよい。 7 (c) and 7 (d) are views showing a second modification of the opening, and FIG. 7 (c) is a plan view showing a part of the suction water tank 2 and the opening 4, and FIG. d) is a sectional view taken along line B-B in FIG. As shown in FIG. 7 (d), the opening 4 is formed between the front wall 2fw of the suction water tank 2 and the bottom plate 2a of the suction water tank 2, and this configuration is the same as the configuration shown in FIG. . Regarding the width direction of the opening 4, the opening 4 shown in FIG. 2 extends over the entire width between the side walls 2 sw and 2 sw of the suction water tank 2, but the opening 4 shown in FIG. It is provided in the central part between both side walls 2sw and 2sw, and is not provided in the vicinity of both side walls 2sw and 2sw of the suction water tank 2.
As shown in FIGS. 7 (a) to 7 (d), the opening 4 functioning as an introduction path for introducing inflow water containing initial dust from the suction water tank 2 into the initial dust storage tank 3 is located in front of the suction water tank 2. You may form in the position spaced apart from the wall 2fw, and you may form in a part between both-side wall 2sw of the suction water tank 2, 2sw.

図８は、吸込水槽２から初期塵芥貯槽３内に初期塵芥を含む流入水を導入するための開口部４に減勢板を設けた実施形態を示す模式的断面図である。図８に示すように、開口部４の位置において、吸込水槽２の前壁２ｆｗおよび吸込水槽２の底版２ａの前面には、上下方向に多段状に複数の減勢板１５が設置されている。複数の減勢板１５は、流入水路２０から落水する流入水が蛇行して下方に流れるように配置されている。このように、流入水路２０から落水した流入水が蛇行して下方に流れるため、流入水路２０から初期塵芥貯槽３へ落水する際の水の勢いが減衰され、開口部４を形成している箇所の土木構造物への負担を軽減することができる。また、開口部４に多段状に複数の減勢板１５を設けることにより、初期塵芥貯槽３から吸込水槽２への初期塵芥の逆流を抑制できる。   FIG. 8 is a schematic cross-sectional view showing an embodiment in which a reducing plate is provided in the opening 4 for introducing the inflowing water containing the initial dust from the suction water tank 2 into the initial dust storage tank 3. As shown in FIG. 8, at the position of the opening 4, a plurality of force-reducing plates 15 are installed in a vertical direction on the front wall 2 fw of the suction water tank 2 and the front surface of the bottom plate 2 a of the suction water tank 2. . The plurality of force reducing plates 15 are arranged so that the inflow water falling from the inflow water channel 20 meanders and flows downward. In this way, the inflowing water that has flowed down from the inflowing water channel 20 meanders and flows downward, so that the momentum of the water when falling from the inflowing water channel 20 to the initial dust storage tank 3 is attenuated and the opening 4 is formed. The burden on civil engineering structures can be reduced. In addition, by providing a plurality of reducing plates 15 in a multi-stage shape in the opening 4, the backflow of the initial dust from the initial dust storage tank 3 to the suction water tank 2 can be suppressed.

図９（ａ），（ｂ）は、本発明の地下排水ポンプ設備１に適用される排水ポンプ１１の一例を示す図である。図９（ａ）は図１に示す第１の実施形態に適用される排水ポンプ１１を示す模式的断面図であり、図９（ｂ）は図４に示す第２の実施形態に適用される排水ポンプ１１を示す模式的断面図である。
図９（ａ）に示す排水ポンプ１１は、立軸渦巻斜流ポンプであり、渦巻ケーシング１６内に流入水を揚水する羽根車１７を備え、また羽根車１７は、駆動装置１４（図１）によって駆動軸１８を介して回転可能となっている。渦巻ケーシング１６には、吸込管１２と吐出河川まで伸びる吐出管１３が接続されている。 FIGS. 9A and 9B are views showing an example of a drainage pump 11 applied to the underground drainage pump facility 1 of the present invention. FIG. 9A is a schematic cross-sectional view showing the drainage pump 11 applied to the first embodiment shown in FIG. 1, and FIG. 9B is applied to the second embodiment shown in FIG. 1 is a schematic cross-sectional view showing a drainage pump 11.
The drainage pump 11 shown in FIG. 9 (a) is a vertical-shaft spiral mixed flow pump and includes an impeller 17 for pumping inflow water in a spiral casing 16, and the impeller 17 is driven by a drive device 14 (FIG. 1). It can rotate via the drive shaft 18. A suction pipe 12 and a discharge pipe 13 extending to the discharge river are connected to the spiral casing 16.

図９（ｂ）に示す排水ポンプ１１は、立軸斜流ポンプであり、吸込口となるベルマウス２１ｓを有するケーシング２１とベルマウス２１ｓより流入水を揚水する羽根車２２を備え、吊り下げ管２４によって吸込水槽内に吊り下げられている。また、羽根車２２は、駆動装置１４（図４）によって駆動軸２３を介して回転可能になっている。排水ポンプ１１には、吐出側河川まで延びる吐出管１３が接続されている。
図９（ａ），（ｂ）に示すように、本発明の地下排水ポンプ設備１には、立軸渦巻斜流ポンプ（図９（ａ））や立軸斜流ポンプ（図９（ｂ））等の各種ポンプが適用可能である。 The drainage pump 11 shown in FIG. 9B is a vertical shaft diagonal flow pump, and includes a casing 21 having a bell mouth 21s serving as a suction port, an impeller 22 for pumping inflow water from the bell mouth 21s, and a suspension pipe 24. Is suspended in the suction tank. The impeller 22 can be rotated via the drive shaft 23 by the drive device 14 (FIG. 4). A discharge pipe 13 extending to the discharge side river is connected to the drain pump 11.
As shown in FIGS. 9 (a) and 9 (b), the underground drainage pump facility 1 of the present invention includes a vertical-axis spiral mixed flow pump (FIG. 9 (a)) and a vertical-axis mixed flow pump (FIG. 9 (b)). Various pumps are applicable.

これまで本発明の実施形態について説明したが、本発明は上述の実施形態に限定されず、その技術思想の範囲内において、種々の異なる形態で実施されてよいことは勿論である。   Although the embodiment of the present invention has been described so far, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention may be implemented in various different forms within the scope of the technical idea.

１ 地下排水ポンプ設備
２ 吸込水槽
２ａ 底版
２ａｄ 垂下部
２ａｈ 水平部
２ａｓ 傾斜部
２ｂｗ 底壁
２ｆｗ 前壁
２ｒｗ 後壁
２ｐｒ 張出部
２ｓｗ 側壁
３ 初期塵芥貯槽
４ 開口部
５ 残水排水槽
５ａ 開口
５ｂ 底面
６ 残水排水ポンプ（水中ポンプ）
７ 散水栓設備
８ 散水栓
１０ 散水配管
１１ 排水ポンプ
１２ 吸込管
１３ 吐出管
１５ 減勢板
１６ 渦巻ケーシング
１７ 羽根車
１８ 駆動軸
２０ 流入水路
２１ ケーシング
２１ｓ ベルマウス
２２ 羽根車
２３ 駆動軸
３１ 掻き上げ装置
１００ 立坑
１０１ 地下放水路
１０２ 吸込水槽
Ｐ ポンプ
Ｖｃ 逆止弁
Ｖｄ 吐出弁 DESCRIPTION OF SYMBOLS 1 Subsurface drainage pump equipment 2 Suction water tank 2a Bottom plate 2ad Hanging part 2ah Horizontal part 2as Inclined part 2bw Bottom wall 2fw Front wall 2rw Rear wall 2pr Overhang part 2sw Side wall 3 Initial dust storage tank 4 Opening 5 Residual water drainage tank 5a Opening 5b Bottom 6 Waste water drainage pump (submersible pump)
DESCRIPTION OF SYMBOLS 7 Water faucet equipment 8 Water spigot 10 Water sprinkling pipe 11 Drainage pump 12 Suction pipe 13 Discharge pipe 15 Reduction plate 16 Spiral casing 17 Impeller 18 Drive shaft 20 Inflow water passage 21 Casing 21s Bell mouth 22 Impeller 23 Drive shaft 31 Scraping device 100 shaft 101 underground discharge channel 102 suction water tank P pump Vc check valve Vd discharge valve

Claims (8)

流入水路からの流入水を受け入れる吸込水槽と該吸込水槽内の水を揚水する排水ポンプとを備えた地下排水ポンプ設備において、
前記吸込水槽の底部に、降雨の初期段階で前記流入水路から前記吸込水槽に流れ込むし渣もしくは塵芥を含む流入水を貯留する初期塵芥貯槽を設けたことを特徴とする地下排水ポンプ設備。 In an underground drainage pump facility comprising a suction water tank that receives inflow water from an inflow water channel and a drainage pump that pumps water in the suction water tank,
An underground drainage pumping facility, wherein an initial dust storage tank is provided at a bottom portion of the suction water tank to store inflow water including residue or dust flowing into the suction water tank from the inflow water channel at an initial stage of rainfall. 前記初期塵芥貯槽は、前記吸込水槽の底面を規定する底版の下方に設置されていることを特徴とする請求項１に記載の地下排水ポンプ設備。   2. The underground drainage pump facility according to claim 1, wherein the initial dust storage tank is installed below a bottom plate that defines a bottom surface of the suction water tank. 前記流入水路を形成した前記吸込水槽の前壁と、前記吸込水槽の底版の前面との間に、前記流入水路からの流入水を前記初期塵芥貯槽に導入するための導入路として機能する開口部を設けたことを特徴とする請求項１又は２に記載の地下排水ポンプ設備。   An opening functioning as an introduction path for introducing the inflow water from the inflow water path into the initial dust storage tank between the front wall of the suction water tank that forms the inflow water path and the front surface of the bottom plate of the suction water tank The underground drainage pump equipment according to claim 1 or 2, characterized in that. 前記吸込水槽の底版の前面に、下方に延びる垂下部を設け、前記初期塵芥貯槽に流入したし渣もしくは塵芥が前記吸込水槽に逆流しないようにしたことを特徴とする請求項１乃至３のいずれか一項に記載の地下排水ポンプ設備。   The bottom of the bottom plate of the suction water tank is provided with a hanging part extending downward so that the residue or dust that flows into the initial dust storage tank does not flow back into the suction water tank. An underground drainage pump facility according to claim 1. 前記初期塵芥貯槽に隣接して、前記初期塵芥貯槽に貯留されたし渣もしくは塵芥を含む流入水の一部を回収するための残水排水槽を設置したことを特徴とする請求項１乃至４のいずれか一項に記載の地下排水ポンプ設備。   5. A residual water drainage tank is provided adjacent to the initial dust storage tank to collect a part of the inflow water containing residue or dust stored in the initial dust storage tank. An underground drainage pump facility according to any one of the above. 前記残水排水槽に、該残水排水槽内に回収された流入水を排出するための残水排水ポンプを設けたことを特徴とする請求項５に記載の地下排水ポンプ設備。   The underground drainage pump facility according to claim 5, wherein a residual drainage pump is provided in the residual drainage tank to discharge the inflow water collected in the residual drainage tank. 前記初期塵芥貯槽内に散水して清掃する散水栓設備を設けたことを特徴とする請求項１乃至６のいずれか一項に記載の地下排水ポンプ設備。   The underground drainage pump equipment according to any one of claims 1 to 6, further comprising a sprinkler faucet that sprinkles and cleans the initial dust storage tank. 前記初期塵芥貯槽の底面は、前記残水排水槽に向かって下り勾配になっていることを特徴とする請求項５に記載の地下排水ポンプ設備。   The underground drainage pump facility according to claim 5, wherein a bottom surface of the initial refuse storage tank is inclined downward toward the residual water drainage tank.
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CN105863040A (en) * 2016-04-18 2016-08-17 上海市城市建设设计研究总院 Attached rainwater pump house structure
CN106592749A (en) * 2016-11-30 2017-04-26 国网山东省电力公司枣庄供电公司 Emergency drainage apparatus for cable well
CN106638894A (en) * 2017-01-22 2017-05-10 兰州有色冶金设计研究院有限公司 Underground sludge discharging device and method
CN107254910A (en) * 2017-07-31 2017-10-17 山东中车华腾环保科技有限公司 It is applicable the integrated lifting means of scattering sewage treatment facility sewage discharge and method
JP2017197976A (en) * 2016-04-27 2017-11-02 株式会社荏原製作所 Malodor prevention type drainage equipment
JP2018096126A (en) * 2016-12-14 2018-06-21 株式会社荏原製作所 Malodor preventing drainage facility

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Publication number Priority date Publication date Assignee Title
CN105863040A (en) * 2016-04-18 2016-08-17 上海市城市建设设计研究总院 Attached rainwater pump house structure
JP2017197976A (en) * 2016-04-27 2017-11-02 株式会社荏原製作所 Malodor prevention type drainage equipment
CN106592749A (en) * 2016-11-30 2017-04-26 国网山东省电力公司枣庄供电公司 Emergency drainage apparatus for cable well
JP2018096126A (en) * 2016-12-14 2018-06-21 株式会社荏原製作所 Malodor preventing drainage facility
CN106638894A (en) * 2017-01-22 2017-05-10 兰州有色冶金设计研究院有限公司 Underground sludge discharging device and method
CN107254910A (en) * 2017-07-31 2017-10-17 山东中车华腾环保科技有限公司 It is applicable the integrated lifting means of scattering sewage treatment facility sewage discharge and method

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