JP3696565B2 - Manhole pump facility - Google Patents

Manhole pump facility Download PDF

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Publication number
JP3696565B2
JP3696565B2 JP2002092707A JP2002092707A JP3696565B2 JP 3696565 B2 JP3696565 B2 JP 3696565B2 JP 2002092707 A JP2002092707 A JP 2002092707A JP 2002092707 A JP2002092707 A JP 2002092707A JP 3696565 B2 JP3696565 B2 JP 3696565B2
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sewage
manhole
pump
storage space
space
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JP2003293444A (en
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俊宣 荒岡
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株式会社東洋電機工業所
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Description

【0001】
【発明の属する技術分野】
本発明は、下水処理に用いられるマンホールポンプ施設に関する。
【0002】
【従来の技術】
下水道は、生活環境の改善や水質の保全を図る上から、不可欠な生活基盤の一部となっており、その普及は、都市部から農山漁村部へと移行している。このような地域は、自然環境や社会環境が都市部と異なり、下水道施設もその地域にあった小規模な施設を必要としている。現在マンホールポンプ施設もそのような小規模施設として普及しつつある。
【0003】
図3に、従来におけるマンホールポンプ施設90の一具体例を示す。図示するように、地中に有底筒状のマンホール91が埋設されており、その頂部に設けた進入開口88には蓋体(マンホール蓋)89が取り付けられる。マンホール91の底部92上には汚水排出ポンプ93が配設されている。また、マンホールの側壁にはマンホール91に内に汚水94を流入させるための汚水流入配管95が開口している。また、汚水排出ポンプ93の流出口にはマンホール91の外部と連絡する汚水吐出管96が接続されている。
【0004】
さらに、マンホール91の側壁内面にはガイドロッド97が同内面と平行にかつ垂直方向に伸延した状態で配設されている。そして、汚水排出ポンプ93に基端を取り付けたガイド部材98の先端がガイドロッド97に上下方向に摺動自在に取り付けられている。また、マンホール91の側壁内面には上下方向に一定の間隔を空けて複数のステップ99が取り付けられている。なお、図中におけるその他の構成要素について説明すると、100〜103は汚水吐出管96や汚水排出ポンプ93に取り付けられた各種弁を示しており、100は仕切弁、101は逆止弁、102は通気弁、103は簡易エア抜き弁を示す。また、104は汚水排出ポンプ93を吊り上げるために用いられる吊りチェーンを示す。
【0005】
次に上記した構成を有するマンホールポンプ施設90の作動について説明すると、汚水流入配管95を通してマンホール91内に流入した汚水94は中継施設としてのマンホール91内の下部に貯留される。その後、汚水排出ポンプ93を駆動することによって、貯留された汚水を、汚水吐出管96を通してマンホールポンプ施設90の下流側に排出することができる。また、汚水排出ポンプ93が故障した場合は、作業者が侵入開口88を通してマンホール91内に入り、吊りチェーン104を図示しないクレーンから降ろしてきた吊り具(図示しない)に係合し、クレーンを作動させることによって汚水排出ポンプ93をマンホール91の外部に取り出し補修を行う。なお、図3において、105は吊りチェーン104を係止するためのフックである。
【0006】
【発明が解決しようとする課題】
しかし、このような従来のマンホールポンプ施設90は、未だ、以下の解決すべき課題を有していた。即ち、従来のマンホールポンプ施設90においては、汚水排出ポンプ93を補修するに際して、作業者がマンホール91内に進入して、吊りチェーン104を吊り具105に係合したり、汚水排出ポンプ93をガイドロッド97から切り離す等の作業を行わねばならない。しかし、マンホール91内は汚水94により悪臭が充満しており、かつ有毒ガスが発生している可能性があり、作業者は、劣悪かつ危険な環境下での補修作業を強いられることになる。
【0007】
また、作業者は、このような補修作業を、十分な足場を確保できない状態、即ち、ステップ99のみを用いて行わねばならず、その面でも補修作業の安全性を確保することが困難であった。本発明は、このような課題を解決するためになされたものであり、作業環境を悪臭や有毒ガスから完全に遮断して、補修作業などを安全かつ快適に行うことができると共に、十分な足場をマンホール内に確保して、安全かつ自在に補修作業などを行うことができるマンホールポンプ施設を提供することを目的とするものである。
【0008】
【課題を解決するための手段】
上記目的を達成するための本発明に係るマンホールポンプ施設は、頂部に開閉可能な進入開口を有する有底筒体からなるマンホールと、マンホールの内部空間を下部汚水貯留空間と上部作業空間に仕切り、かつ上面に作業床面を形成する気密隔壁と、外部から汚水を下部汚水貯留空間内に流入させる汚水流入配管と、下部汚水貯留空間内の汚水を外部に排出するための汚水排出ポンプとを具備したマンホールポンプ施設において、前記気密隔壁の一部を下方に凹設して前記下部汚水貯留空間内の前記汚水中に浸漬可能な有底筒状の凹部隔壁を形成し、前記凹部隔壁の底板上に前記汚水排出ポンプを設置したことを特徴とする。
【0009】
上記したように、上部作業空間は汚水が流入する下部汚水貯留空間から完全に気密状態で遮断されている。従って、下部汚水貯留空間において発生する悪臭や有毒ガスが上部作業空間内に流入することがなく、作業者は汚水排出ポンプの補修作業などを安全、容易かつ快適に行うことができる。しかも、気密隔壁は、その上面に十分な広さの作業床面を形成することができるので、作業者は、十分な足場を確保しながら、汚水排出ポンプの補修作業等を行うことができ、この面からも補修作業の安全性を十分に確保できる。さらに、単にマンホール内部を気密隔壁によって二分割するのみでマンホールポンプ施設を構築できるので、安価に安全かつ快適な作業環境を有するマンホールポンプ施設を構築できる。
【0010】
さらに、気密隔壁の一部を下方に凹設して下部汚水貯留空間内の汚水中に浸漬可能な有底筒状の凹部隔壁を形成し、凹部隔壁の底板上に汚水排出ポンプを設置したことにより、下部汚水貯留空間内の汚水の水位が、凹部隔壁の周側面とマンホールの内周面との間に形成される余裕空間内を上昇し、同水位が汚水排出ポンプのポンプ部より上方に位置すると、連通管現象によって汚水排出ポンプポンプ部内にも汚水が自動的に流入することになる。従って、汚水排出ポンプとして、構造が複雑で繊維質のゴミで閉塞する可能性がある自吸式ポンプを使用する必要がなく、自吸式でないが繊維質のゴミに対応できる無閉塞ポンプを使用することができるので、より信頼性のあるマンホールポンプ施設を構築することができる。
【0011】
また、上記目的を達成するための本発明に係るマンホールポンプ施設は、頂部に開閉可能な進入開口を有する有底筒体からなるマンホールと、マンホールの内部空間を下部汚水貯留空間と上部作業空間に仕切り、かつ上面に作業床面を形成する気密隔壁と 、外部から汚水を下部汚水貯留空間内に流入させる汚水流入配管と、下部汚水貯留空間内の汚水を外部に排出するための汚水排出ポンプとを具備したマンホールポンプ施設において、気密隔壁の一部を上方に凸設して凸設部の内側に下部汚水貯留空間内の汚水が流入する余裕空間を形成し、余裕空間内の汚水の水位を汚水排出ポンプのポンプ部より上方まで上昇可能としたことにも特徴を有する。
このように、凸設部の内側に下部汚水貯留空間内の汚水が流入する余裕空間を形成し、余裕空間内の汚水の水位を汚水排出ポンプのポンプ部より上方まで上昇可能としたことにより、下部汚水貯留空間内の汚水の水位が余裕空間内を上昇し、同水位が汚水排出ポンプのポンプ部より上方に位置すると、連通管現象によって汚水排出ポンプのポンプ部内にも汚水が自動的に流入することになる。従って、汚水排出ポンプとして、構造が複雑で繊維質のゴミで閉塞する可能性がある自吸式ポンプを使用する必要がなく、自吸式でないが繊維質のゴミに対応できる無閉塞ポンプを使用することができるので、より信頼性のあるマンホールポンプ施設を構築することができる。
【0012】
【発明の実施の態様】
まず、本実施の形態に係るマンホールポンプ施設40の構成について図1を参照して説明する。
【0013】
図示するように、本発明に係るマンホールポンプ施設40は、実質的に、地中に埋設され、頂部に開閉可能な進入開口11を有する有底筒体からなるマンホール12と、マンホール12の内部空間を下部汚水貯留空間13と上部作業空間14に仕切り、かつ上面に作業床面15を形成する気密隔壁16と、外部から汚水18を下部汚水貯留空間13内に流入させる汚水流入配管17と、下部汚水貯留空間13内の汚水18を外部に排出するための汚水排出ポンプ19とを具備する。
【0014】
次に、上記した基本的構成を有するマンホールポンプ施設40の各構成要素について詳細に説明する。図示するように、マンホール12は、好ましくは中空筒状のコンクリート二次製品からなり、その頂部に設けた進入開口11は、地上面20と面一状態になっている。また、進入開口11には、開閉蓋(マンホール蓋)21が着脱自在に取り付けられている。
【0015】
気密隔壁16は、図示しない補強リブを下面に取り付けた板からなり、その周縁部を所望の接合手段(溶接、ボルトなど)によってマンホール12の内周面に接合されている。また、気密隔壁16は、汚水18から発生する有毒ガスまたは汚水18の付着による腐食を防止するため、このましくはステンレス鋼板などの耐食性を有する板材から形成する。
【0016】
汚水流入配管17は、図示の実施例では、上部作業空間14を介することなく、直接下部汚水貯留空間13の上部に開口している。
【0017】
また、本実施の形態に係るマンホールポンプ施設40は図1に示すように、気密隔壁16の少なくとも一部を下方に凹設して下部汚水貯留空間13内の汚水18中に浸漬可能な有底筒状の凹部隔壁41を形成し、作業床面15を上面に形成する凹部隔壁41の底板42上に汚水排出ポンプ19を設置している。汚水排出ポンプ19の吸引開口部には、下部汚水貯留空間13内の汚水18中を下方に向けて伸延する汚水吸上管24の上端開口部が接続されている。また、汚水吸上管24の下端開口部はマンホール12の底部近傍で開口している。一方、汚水排出ポンプ19の排出開口部は、マンホールポンプ施設40の下流側配管を構成する汚水排出管29の上流側と、エア抜き弁30、逆止弁32及び仕切弁33を介して連通連結されている。
さらに、本実施の形態では、上記作業空間14内において、マンホール12の内周面であって、進入開口11の直下方をなす部分に、上下方向に所定の間隔を空けて複数のステ ップ31が取り付けられている。
【0018】
このように、本実施の形態では、凹部隔壁41の底板42上に汚水排出ポンプ19を設置したことにより、下部汚水貯留空間13内の汚水18の水位47が、凹部隔壁41の外周面43とマンホール12の周壁44の内周面との間に形成される余裕空間45内を上昇し、同水位47が汚水排出ポンプ19のポンプ部46より上方に位置すると、連通管現象によって汚水排出ポンプ19のポンプ部46内にも汚水18が自動的に流入することになる。従って、汚水排出ポンプ19として、構造が複雑で繊維質のゴミで閉塞する可能性がある自吸式ポンプを使用する必要がなく、自吸式でないが繊維質のゴミに対応できる無閉塞ポンプを使用することができるので、より信頼性のあるマンホールポンプ施設を構築することができる。また、この際、水位センサで、汚水排出ポンプ19のポンプ部46内に汚水18が自動的に流入したことを検出し、検出信号に基づいて汚水排出ポンプ19を駆動して汚水を自動的に排出することができる。
【0019】
なお、気密隔壁16の凹設形態は、図1に示す形態に何ら限定されるものではなく、例えば、気密隔壁16を段丘状とした形態、気密隔壁16の中央部を隆起すると共に中央部の周りの環状周縁部を凹設した形態や、気密隔壁16を水平方向に交互に凹凸とした形態や、気密隔壁16を階段状とした形態とすることができる。
【0020】
また、本実施の形態では、図2に示すように、気密隔壁16の中央部に開口部48を設け、その周囲に設けた環状台座49上にポンプ取付板50をボルト等で固定し、ポンプ取付板50上に仕切り弁51をボルト等で固定し、さらにポンプ取付板50の下面中央部に汚水吸上管24の上端開口部52を一体的に連通連結すると共に、仕切り弁51の上面に汚水排出ポンプ19を、その吸引開口部53が汚水吸上管24の上端開口部52と整合する状態でボルト等を用いて固定載置している。
【0021】
このような構成とすることによって、汚水排出ポンプ19をマンホールポンプ施設40から取り出して補修する必要がある場合であっても、仕切り弁51を閉弁した後、仕切り弁51から汚水排出ポンプ19を容易かつ迅速に取り外して、補修を行うことができる。なお、仕切り弁51から汚水排出ポンプ19を取り外しても、仕切り弁51が閉弁状態なので、悪臭や有毒ガス等の上部作業空間14への流入を確実に防止することができる。なお、本実施の形態では、図1に示すように、凹部隔壁41の底板42の隅部には結露捕集用溝54が設けられており、結露捕集用溝54内には逆止弁55を具備する結露水排出配管56を介して結露水を下部汚水貯留空間13内に流出する結露水排出用ポンプ57が配設されている。また、58はベント管である。
【0022】
さらに、図1に示すように気密隔壁16の一部を凹設する代わりに、気密隔壁16の一部を上方に凸設して凸設部を形成し、該凸設部の内側に下部汚水貯留空間13内の汚水18が流入する余裕空間を形成し、余裕空間内の汚水18の水位を汚水排出ポンプ19のポンプ部〈ポンプケーシング〉より上方まで上昇可能としたことにも特徴を有する。この場合、汚水流入配管17を拡径して、その内部に余裕空間を形成するようにしてもよい。
【0023】
このように、凸設部の内側に下部汚水貯留空間13内の汚水18が流入する余裕空間を形成し、余裕空間内の汚水18の水位を汚水排出ポンプ19のポンプ部より上方まで上昇可能としたことにより、下部汚水貯留空間13内の汚水18の水位が余裕空間内を上昇し、同水位が汚水排出ポンプ19のポンプ部より上方に位置すると、連通管現象によって汚水排出ポンプ19のポンプ部内にも汚水18が自動的に流入することになる。従って、汚水排出ポンプ19として、構造が複雑で繊維質のゴミで閉塞する可能性がある自吸式ポンプを使用する必要がなく、自吸式でないが繊維質のゴミに対応できる無閉塞ポンプを使用することができるので、より信頼性のあるマンホールポンプ施設を構築することができる。
【図面の簡単な説明】
【図1】本発明の実施の形態に係るマンホールポンプ施設の構成説明図である。
【図2】本発明の実施の形態に係るマンホールポンプ施設における汚水排出ポンプの分離 構造の拡大説明図である。
【図3】従来のマンホールポンプ施設の構成説明図である。
【符号の説明】
11 進入開口
12 マンホール
13 下部汚水貯留空間
14 上部作業空間
15 作業床面
16 気密隔壁
17 汚水流入配管
18 汚水
19 汚水排出ポンプ
20 地上面
21 開閉蓋(マンホール蓋)
23 吸上管挿通開口部
24 汚水吸上管
29 汚水排出管
30 エア抜き弁
31 ステップ
32 逆止弁
33 仕切弁
40 マンホールポンプ施設
41 凹部隔壁
42 底板
43 外周面
44 周壁
45 余裕空間
46 ポンプ部
47 水位
48 開口部
49 環状台座
50 ポンプ取付板
51 仕切り弁
52 上端開口部
53 吸引開口部
54 結露捕集用溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a manhole pump facility used for sewage treatment.
[0002]
[Prior art]
The sewerage system is an indispensable part of the living infrastructure for improving the living environment and preserving the water quality. The spread of the sewerage system has shifted from urban areas to rural areas. In such areas, the natural environment and social environment are different from urban areas, and sewerage facilities also require small-scale facilities suitable for the area. Currently, manhole pump facilities are also becoming popular as such small-scale facilities.
[0003]
FIG. 3 shows a specific example of a conventional manhole pump facility 90. As shown in the figure, a bottomed cylindrical manhole 91 is embedded in the ground, and a lid (manhole lid) 89 is attached to an entrance opening 88 provided at the top. A sewage discharge pump 93 is disposed on the bottom 92 of the manhole 91. Further, a sewage inflow pipe 95 for allowing the sewage 94 to flow into the manhole 91 is opened on the side wall of the manhole. A sewage discharge pipe 96 communicating with the outside of the manhole 91 is connected to the outlet of the sewage discharge pump 93.
[0004]
Further, a guide rod 97 is disposed on the inner surface of the side wall of the manhole 91 in a state of extending in the vertical direction in parallel with the inner surface. And the front-end | tip of the guide member 98 which attached the base end to the sewage discharge pump 93 is attached to the guide rod 97 so that sliding is possible to an up-down direction. In addition, a plurality of steps 99 are attached to the inner surface of the side wall of the manhole 91 at regular intervals in the vertical direction. The other components in the figure will be described. Reference numerals 100 to 103 denote various valves attached to the sewage discharge pipe 96 and the sewage discharge pump 93, where 100 is a gate valve, 101 is a check valve, and 102 is A ventilation valve 103 is a simple air vent valve. Reference numeral 104 denotes a suspension chain used for lifting the sewage discharge pump 93.
[0005]
Next, the operation of the manhole pump facility 90 having the above-described configuration will be described. The sewage 94 that flows into the manhole 91 through the sewage inflow pipe 95 is stored in the lower part of the manhole 91 as a relay facility. Thereafter, by driving the sewage discharge pump 93, the stored sewage can be discharged to the downstream side of the manhole pump facility 90 through the sewage discharge pipe 96. Further, when the sewage discharge pump 93 fails, the operator enters the manhole 91 through the intrusion opening 88, engages the suspension chain 104 from a crane (not shown), and operates the crane. As a result, the sewage discharge pump 93 is taken out of the manhole 91 and repaired. In FIG. 3 , reference numeral 105 denotes a hook for locking the suspension chain 104.
[0006]
[Problems to be solved by the invention]
However, such a conventional manhole pump facility 90 still has the following problems to be solved. That is, in the conventional manhole pump facility 90, when repairing the sewage discharge pump 93, an operator enters the manhole 91 to engage the suspension chain 104 with the suspension 105 or guide the sewage discharge pump 93. It is necessary to perform an operation such as detaching from the rod 97. However, the inside of the manhole 91 is filled with bad odor due to the sewage 94, and toxic gas may be generated, and the worker is forced to perform repair work in a poor and dangerous environment.
[0007]
In addition, the worker must perform such repair work in a state where a sufficient scaffold cannot be secured, that is, using only step 99, and it is difficult to secure the safety of the repair work in this respect as well. It was. The present invention has been made in order to solve such a problem, and can completely and safely prevent the work environment from bad odors and toxic gases, and can perform repair work safely and comfortably. It is an object of the present invention to provide a manhole pump facility that can secure a manhole in a manhole and perform repair work safely and freely.
[0008]
[Means for Solving the Problems]
The manhole pump facility according to the present invention for achieving the above object is a manhole comprising a bottomed cylindrical body having an opening that can be opened and closed at the top, and the inner space of the manhole is divided into a lower sewage storage space and an upper work space, And an airtight partition that forms a work floor on the upper surface, a sewage inflow pipe for allowing sewage to flow into the lower sewage storage space from the outside, and a sewage discharge pump for discharging the sewage in the lower sewage storage space to the outside. In the manhole pump facility, a part of the hermetic partition is recessed downward to form a bottomed cylindrical recess partition that can be immersed in the sewage in the lower sewage storage space, and on the bottom plate of the recess partition The sewage discharge pump is installed in
[0009]
As described above, the upper work space is completely sealed off from the lower sewage storage space into which sewage flows. Therefore, malodors and toxic gases generated in the lower sewage storage space do not flow into the upper work space, and the operator can perform repair work on the sewage discharge pump safely, easily and comfortably. In addition, since the airtight partition wall can form a sufficiently large work floor on the upper surface, the operator can perform repair work etc. of the sewage discharge pump while securing sufficient scaffolding, From this aspect, the safety of repair work can be sufficiently secured. Furthermore, since the manhole pump facility can be constructed simply by dividing the inside of the manhole into two by an airtight partition wall, a manhole pump facility having a safe and comfortable working environment can be constructed at low cost.
[0010]
Furthermore, a part of the airtight partition wall was recessed downward to form a bottomed cylindrical recess partition wall that can be immersed in the sewage in the lower sewage storage space, and a sewage discharge pump was installed on the bottom plate of the recess partition wall As a result, the level of sewage in the lower sewage storage space rises in the marginal space formed between the peripheral side surface of the recessed partition wall and the inner peripheral surface of the manhole, and the water level is above the pump part of the sewage discharge pump. If it is located, the sewage automatically flows into the sewage discharge pump pump part by the communication pipe phenomenon. Therefore, it is not necessary to use a self-priming pump that has a complicated structure and may be clogged with fibrous waste as a wastewater discharge pump. Therefore, a more reliable manhole pump facility can be constructed.
[0011]
In addition, the manhole pump facility according to the present invention for achieving the above object includes a manhole comprising a bottomed cylindrical body having an entrance opening that can be opened and closed at the top, and the internal space of the manhole as a lower sewage storage space and an upper work space. An airtight partition that forms a work floor on the upper surface, a sewage inflow pipe that allows sewage to flow into the lower sewage storage space from the outside, and a sewage discharge pump for discharging sewage in the lower sewage storage space to the outside In the manhole pump facility equipped with a part of the airtight partition wall, a part of the airtight partition is projected upward to form a marginal space for the sewage in the lower sewage storage space to flow inside the projection, and the level of sewage in the marginal space is controlled. It is also characterized in that it can be raised above the pump part of the sewage discharge pump.
In this way, by forming a margin space where the sewage in the lower sewage storage space flows inside the protruding portion, the sewage water level in the margin space can be raised above the pump portion of the sewage discharge pump, When the sewage level in the lower sewage storage space rises in the marginal space and the water level is located above the pump part of the sewage discharge pump, the sewage automatically flows into the pump part of the sewage discharge pump due to the communication pipe phenomenon. Will do. Therefore, it is not necessary to use a self-priming pump that has a complicated structure and may be clogged with fibrous waste as a wastewater discharge pump. Therefore, a more reliable manhole pump facility can be constructed.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
First, the configuration of the manhole pump facility 40 according to the present embodiment will be described with reference to FIG.
[0013]
As shown in the drawing, the manhole pump facility 40 according to the present invention is substantially embedded in the ground and has a manhole 12 having a bottomed cylindrical body having an entrance opening 11 that can be opened and closed at the top, and an internal space of the manhole 12. Is divided into a lower sewage storage space 13 and an upper work space 14, and an airtight partition wall 16 forming a work floor 15 on the upper surface, a sewage inflow pipe 17 for allowing sewage 18 to flow into the lower sewage storage space 13 from the outside, A sewage discharge pump 19 for discharging the sewage 18 in the sewage storage space 13 to the outside is provided.
[0014]
Next, each component of the manhole pump facility 40 having the basic configuration described above will be described in detail. As shown in the figure, the manhole 12 is preferably made of a hollow cylindrical concrete secondary product, and the entrance opening 11 provided at the top thereof is flush with the ground surface 20. An opening / closing lid (manhole lid) 21 is detachably attached to the entry opening 11.
[0015]
The hermetic partition 16 is made of a plate having reinforcing ribs (not shown) attached to the lower surface, and the peripheral edge thereof is bonded to the inner peripheral surface of the manhole 12 by desired bonding means (welding, bolts, etc.). Moreover, in order to prevent the corrosion by the adhesion of the toxic gas generated from the sewage 18 or the sewage 18, the airtight partition 16 is preferably formed from a plate material having corrosion resistance such as a stainless steel plate.
[0016]
In the illustrated embodiment , the sewage inflow pipe 17 opens directly above the lower sewage storage space 13 without going through the upper work space 14.
[0017]
In addition, as shown in FIG. 1 , the manhole pump facility 40 according to this embodiment has at least a part of the airtight partition wall 16 recessed downward, and can be immersed in the sewage 18 in the lower sewage storage space 13. A bottom cylindrical recess partition 41 is formed, and the sewage discharge pump 19 is installed on the bottom plate 42 of the recess partition 41 forming the work floor 15 on the upper surface. An upper end opening of a sewage suction pipe 24 that extends downward in the sewage 18 in the lower sewage storage space 13 is connected to the suction opening of the sewage discharge pump 19. Further, the lower end opening of the sewage suction pipe 24 is opened near the bottom of the manhole 12. On the other hand, the discharge opening of the sewage discharge pump 19 is connected to the upstream side of the sewage discharge pipe 29 constituting the downstream pipe of the manhole pump facility 40 via the air vent valve 30, the check valve 32 and the gate valve 33. Has been.
Furthermore, in the present embodiment, in the working space 14, a inner circumferential surface of the manhole 12, the portion forming the side directly below the entry opening 11, a plurality of stearyl-up in the vertical direction with a predetermined interval 31 is attached.
[0018]
Thus, in the present embodiment, the sewage discharge pump 19 is installed on the bottom plate 42 of the recessed partition wall 41, so that the water level 47 of the sewage 18 in the lower sewage storage space 13 is changed from the outer peripheral surface 43 of the recessed partition wall 41. When the interior of the marginal space 45 formed between the manhole 12 and the inner peripheral surface 44 of the manhole 12 rises and the water level 47 is located above the pump portion 46 of the sewage discharge pump 19, the sewage discharge pump 19 is caused by a communication pipe phenomenon. The sewage 18 will also automatically flow into the pump section 46. Therefore, it is not necessary to use a self-priming pump that has a complicated structure and may be clogged with fibrous garbage as the sewage discharge pump 19, and is a non-occlusion pump that is not self-priming but can handle fibrous garbage. Since it can be used, a more reliable manhole pump facility can be constructed. At this time, the water level sensor detects that the sewage 18 has automatically flowed into the pump section 46 of the sewage discharge pump 19, and the sewage discharge pump 19 is driven based on the detection signal to automatically discharge the sewage. Can be discharged.
[0019]
In addition, the recessed form of the airtight partition 16 is not limited to the form shown in FIG. 1. For example, the airtight partition 16 has a terrace shape, the central part of the hermetic partition 16 is raised and the central part is It is possible to adopt a form in which the surrounding annular peripheral portion is recessed, a form in which the airtight partition 16 is alternately uneven in the horizontal direction, or a form in which the airtight partition 16 is in a stepped shape.
[0020]
In the present embodiment, as shown in FIG. 2 , an opening 48 is provided at the center of the hermetic partition 16, and a pump mounting plate 50 is fixed on an annular pedestal 49 provided around the opening 48 with a bolt or the like. The gate valve 51 is fixed on the mounting plate 50 with a bolt or the like, and the upper end opening 52 of the sewage suction pipe 24 is integrally connected to the central portion of the lower surface of the pump mounting plate 50. The sewage discharge pump 19 is fixedly mounted using a bolt or the like in a state where the suction opening 53 is aligned with the upper end opening 52 of the sewage suction pipe 24.
[0021]
Even if it is necessary to take out the sewage discharge pump 19 from the manhole pump facility 40 and repair it by such a configuration, the sewage discharge pump 19 is removed from the sluice valve 51 after the gate valve 51 is closed. It can be easily and quickly removed and repaired. Even if the sewage discharge pump 19 is removed from the gate valve 51, since the gate valve 51 is in the closed state, it is possible to reliably prevent the inflow of bad odors or toxic gases into the upper working space 14. In the present embodiment, as shown in FIG. 1 , a condensation collection groove 54 is provided at a corner of the bottom plate 42 of the recessed partition wall 41, and a check valve is provided in the condensation collection groove 54. A dew condensation water discharge pump 57 for flowing the dew condensation water into the lower sewage storage space 13 is disposed via a dew condensation water discharge pipe 56 having 55. Reference numeral 58 denotes a vent pipe.
[0022]
Further, as shown in FIG. 1 , instead of recessing a part of the airtight partition wall 16, a part of the airtight partition wall 16 is protruded upward to form a projecting portion, and the lower sewage is formed inside the projecting portion. Another feature is that an allowance space into which the sewage 18 in the storage space 13 flows is formed, and the water level of the sewage 18 in the allowance space can be raised above the pump portion (pump casing) of the sewage discharge pump 19. In this case, the sewage inflow pipe 17 may be expanded in diameter to form a margin space therein.
[0023]
In this way, a marginal space into which the sewage 18 in the lower sewage storage space 13 flows is formed inside the protruding portion, and the water level of the sewage 18 in the marginal space can be raised above the pump portion of the sewage discharge pump 19. As a result, when the water level of the sewage 18 in the lower sewage storage space 13 rises in the marginal space and the water level is located above the pump part of the sewage discharge pump 19, the inside of the pump part of the sewage discharge pump 19 is caused by the communication pipe phenomenon. In addition, the sewage 18 will automatically flow in. Therefore, it is not necessary to use a self-priming pump that has a complicated structure and may be clogged with fibrous garbage as the sewage discharge pump 19, and is a non-occlusion pump that is not self-priming but can handle fibrous garbage. Since it can be used, a more reliable manhole pump facility can be constructed.
[Brief description of the drawings]
FIG. 1 is a configuration explanatory diagram of a manhole pump facility according to an embodiment of the present invention.
FIG. 2 is an enlarged explanatory view of a separation structure for a sewage discharge pump in a manhole pump facility according to an embodiment of the present invention .
FIG. 3 is a diagram illustrating the configuration of a conventional manhole pump facility.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Entrance opening 12 Manhole 13 Lower sewage storage space 14 Upper work space 15 Work floor surface 16 Airtight partition wall 17 Sewage inflow piping 18 Sewage 19 Sewage discharge pump 20 Ground surface 21 Opening and closing cover (manhole cover)
23 Suction pipe insertion opening 24 Sewage suction pipe 29 Sewage discharge pipe 30 Air vent valve 31 Step 32 Check valve 33 Gate valve 40 Manhole pump facility 41 Recessed partition wall 42 Bottom plate 43 Outer surface 44 Perimeter wall 45 Margin space 46 Pump part 47 Water level 48 Opening 49 Annular base 50 Pump mounting plate 51 Gate valve 52 Upper end opening 53 Suction opening 54 Condensation collection groove

Claims (2)

頂部に開閉可能な進入開口を有する有底筒体からなるマンホールと、A manhole consisting of a bottomed cylinder having an opening opening that can be opened and closed at the top;
前記マンホールの内部空間を下部汚水貯留空間と上部作業空間に仕切り、かつ上面に作業床面を形成する気密隔壁と、  An airtight partition that partitions the internal space of the manhole into a lower sewage storage space and an upper work space, and forms a work floor on the upper surface;
外部から汚水を前記下部汚水貯留空間内に流入させる汚水流入配管と、  A sewage inflow pipe for allowing sewage to flow into the lower sewage storage space from the outside;
前記下部汚水貯留空間内の前記汚水を外部に排出するための汚水排出ポンプとを具備したマンホールポンプ施設において、  In a manhole pump facility equipped with a sewage discharge pump for discharging the sewage in the lower sewage storage space to the outside,
前記気密隔壁の一部を下方に凹設して前記下部汚水貯留空間内の前記汚水中に浸漬可能な有底筒状の凹部隔壁を形成し、前記凹部隔壁の底板上に前記汚水排出ポンプを設置したことを特徴とするマンホールポンプ施設。  A part of the airtight partition wall is recessed downward to form a bottomed cylindrical recess partition wall that can be immersed in the sewage in the lower sewage storage space, and the sewage discharge pump is disposed on the bottom plate of the recess partition wall. A manhole pump facility characterized by its installation.
頂部に開閉可能な進入開口を有する有底筒体からなるマンホールと、A manhole consisting of a bottomed cylinder having an opening opening that can be opened and closed at the top;
前記マンホールの内部空間を下部汚水貯留空間と上部作業空間に仕切り、かつ上面に作業床面を形成する気密隔壁と、  An airtight partition that partitions the internal space of the manhole into a lower sewage storage space and an upper work space, and forms a work floor on the upper surface;
外部から汚水を前記下部汚水貯留空間内に流入させる汚水流入配管と、  A sewage inflow pipe for allowing sewage to flow into the lower sewage storage space from the outside;
前記下部汚水貯留空間内の前記汚水を外部に排出するための汚水排出ポンプとを具備したマンホールポンプ施設において、  In a manhole pump facility equipped with a sewage discharge pump for discharging the sewage in the lower sewage storage space to the outside,
前記気密隔壁の一部を上方に凸設して凸設部を形成し、該凸設部の内側に前記下部汚水貯留空間内の前記汚水が流入する余裕空間を形成し、前記余裕空間内の前記汚水の水位を前記汚水排出ポンプのポンプ部より上方まで上昇可能としたことを特徴とするマンホールポンプ施設。  A part of the airtight partition wall is projected upward to form a projecting portion, and a margin space for the sewage in the lower sewage storage space to flow inside the projecting portion, A manhole pump facility characterized in that the level of the sewage can be raised above the pump part of the sewage discharge pump.
JP2002092707A 2002-03-28 2002-03-28 Manhole pump facility Expired - Fee Related JP3696565B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111042305A (en) * 2019-12-25 2020-04-21 江苏惠生流体设备有限公司 Automatic control just prevents blockking up glass steel integration and promotes pump station

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8347912B2 (en) * 2006-03-22 2013-01-08 Miroslaw Szuster Waste water pumping device
KR101671335B1 (en) * 2016-01-22 2016-11-01 이종탁 Manhole pumpimg station having valve chamber separated in pump sump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111042305A (en) * 2019-12-25 2020-04-21 江苏惠生流体设备有限公司 Automatic control just prevents blockking up glass steel integration and promotes pump station

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