JP2006022793A

JP2006022793A - Pump station

Info

Publication number: JP2006022793A
Application number: JP2004203973A
Authority: JP
Inventors: Eiji Sugai; 栄司菅井; Shinji Suzuki; 進二鈴木; Ko Fujino; 耕藤野; Masaaki Shibakusa; 正明柴草
Original assignee: Ebara Corp
Current assignee: Ebara Corp
Priority date: 2004-07-09
Filing date: 2004-07-09
Publication date: 2006-01-26
Anticipated expiration: 2024-07-09
Also published as: JP4537786B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump station requiring less site area and enabling the arrangement of the delivery pipes and delivery valves of pumps on an installation floor without allowing them to interfere with each other. <P>SOLUTION: In this pump station formed by installing the pumps in a pump suction water tank, a plurality of semi-closed type or closed type water tanks 2 are installed in series in a water channel communicating with the pump suction water tank 1, and a vertical shaft pumps 3 are installed in the semi-closed type or the closed type water tanks 2. Thus, since the pump station is formed in such a structure that free surfaces are absent near the pumps, harmful air suction swirl is prevented from occurring on the pump side on the upstream side of the pumps. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ポンプ吸込水槽に複数台のポンプを設置した構成のポンプ場に関するものである。 The present invention relates to a pump station having a configuration in which a plurality of pumps are installed in a pump suction water tank.

従来この種のポンプ場では、ポンプ運転中に有害な渦が発生するという問題がある。その対策として、図１に示すようにポンプ１０１と吸込水槽１０２を１：１に対応させたもの、図２に共通の吸込水槽１０２に複数台（図では４台）のポンプ１０１を並べて配置したもの、図３に示すように吸込水槽１０２の幅Ｌを広くとり、該吸込水槽１０２に上流側から下流側へと複数台（図では２台）のポンプ１０１をポンプ間隔Ｌ２を広くとって直列に配置したものがあった。なお、図１乃至図３において、（ａ）は側断面図、（ｂ）は平面図である。 Conventionally, this type of pump station has a problem that harmful vortices are generated during pump operation. As countermeasures, as shown in FIG. 1, the pump 101 and the suction water tank 102 correspond to 1: 1, and a plurality of (four in the figure) pumps 101 are arranged side by side in the common suction water tank 102 in FIG. 2. As shown in FIG. 3, the suction water tank 102 has a wide width L, and a plurality of (two in the figure) pumps 101 are arranged in series in the suction water tank 102 from the upstream side to the downstream side with a wide pump interval L2. There was something arranged in. 1 to 3, (a) is a side sectional view and (b) is a plan view.

図１に示すポンプ場では、ポンプ１０１と吸込水槽１０２を１：１に対応させるため広いスペースを必要とするという問題があり、また図２に示すポンプ場も広いスペースを必要とするという問題がある。また、図３に示すように吸込水槽１０２の真中にポンプ１０１を直列に配置する場合は、上流側の流速を遅くして有害な渦が発生しないようにしたり（結果として吸込水槽１０２の幅Ｌ１が広くなる）、ポンプ１０１の間隔Ｌ２を大きくとらなければならず、広いスペースが必要となる。上記のように、図１、図２及び図３に示す従来のポンプ場はいずれも大きな敷地スペースを必要とし、結果として建設コストが高くなるという問題があった。 In the pump station shown in FIG. 1, there is a problem that a large space is required to make the pump 101 and the suction water tank 102 correspond to 1: 1, and there is a problem that the pump station shown in FIG. 2 also requires a large space. is there. Further, when the pump 101 is arranged in series in the middle of the suction water tank 102 as shown in FIG. 3, the upstream flow rate is slowed so that no harmful vortex is generated (as a result, the width L1 of the suction water tank 102). The distance L2 between the pumps 101 must be large, and a large space is required. As described above, each of the conventional pump stations shown in FIGS. 1, 2 and 3 has a problem that a large site space is required, resulting in high construction costs.

また、高流速化し、吸込水槽の幅を狭くしたセミクローズ吸込水槽を備えたものもあるが、複数台並列に配置する場合に、吸込水槽の上部の設置床にポンプを駆動する駆動機１０４や減速機１０５や吐出配管１０６や吐出弁１０７が図４に示すように互いに干渉しないように配置するため、吸込水槽１０２、１０２の幅は最低ポンプ口径の３倍は確保する必要があった。 Also, some have a semi-closed suction water tank with a high flow velocity and a narrow suction water tank, but when multiple units are arranged in parallel, the drive unit 104 that drives the pump on the installation floor above the suction water tank Since the speed reducer 105, the discharge pipe 106, and the discharge valve 107 are arranged so as not to interfere with each other as shown in FIG. 4, it is necessary to secure the width of the suction water tanks 102, 102 to three times the minimum pump diameter.

本発明は上述の点に鑑みてなされたもので、敷地面積が少なくて済み、且つ設置床にポンプの吐出配管や吐出弁を互いに干渉することなく、配置できるポンプ場を提供することを目的とする。 The present invention has been made in view of the above points, and an object of the present invention is to provide a pump station that requires a small site area and that can be disposed on the installation floor without interfering with pump discharge piping and discharge valves. To do.

上記課題を解決するため請求項１に記載の発明は、ポンプ吸込水槽にポンプを設置した構成のポンプ場において、前記ポンプ吸込水槽に連通する水路にセミクローズタイプ又はクローズタイプ水槽を複数個直列に設け、該各セミクローズタイプ又はクローズタイプ水槽に立軸ポンプを設置したことを特徴とする。 In order to solve the above-mentioned problem, the invention described in claim 1 is a pump station having a pump installed in a pump suction water tank. A plurality of semi-closed type or closed type water tanks are connected in series in a water channel communicating with the pump suction water tank. And a vertical pump is installed in each semi-closed type or closed type water tank.

請求項２に記載の発明は、請求項１に記載のポンプ場において、前記各セミクローズタイプ又はクローズタイプ水槽の底面に渦防止装置を配置したことを特徴とする。 The invention described in claim 2 is characterized in that, in the pump station according to claim 1, a vortex preventing device is arranged on the bottom surface of each semi-closed type or closed type water tank.

請求項３に記載の発明は、請求項１に記載のポンプ場において、前記立軸ポンプはコラム形水中モータポンプであることを特徴とする。 According to a third aspect of the present invention, in the pump station according to the first aspect, the vertical shaft pump is a column type submersible motor pump.

請求項４に記載の発明は、請求項１乃至３のいずれか１項に記載のポンプ場において、前記ポンプ吸込水槽に連通する水路の水平方向幅又は垂直方向幅を上流側から下流側にいくに従い狭くしたことを特徴する。 According to a fourth aspect of the present invention, in the pump station according to any one of the first to third aspects, the horizontal width or the vertical width of the water channel communicating with the pump suction water tank goes from the upstream side to the downstream side. It is characterized by narrowing according to.

請求項５に記載の発明は、請求項１乃至４のいずれか１項に記載のポンプ場において、前記複数台の各ポンプの吐出口に接続された吐出弁及び吐出管を前記セミクローズタイプ又はクローズタイプ水槽の上部設置床に前記水路に直交する方向に配置したことを特徴とする。 The invention according to claim 5 is the pump station according to any one of claims 1 to 4, wherein the discharge valve and the discharge pipe connected to the discharge port of each of the plurality of pumps are the semi-closed type or It arrange | positions in the direction orthogonal to the said water channel at the upper installation floor of a closed type water tank, It is characterized by the above-mentioned.

請求項６に記載の発明は、請求項１に記載のポンプ場において、立軸ポンプをその吸込水位レベルに差異を設けて設置したことを特徴とする。 The invention according to claim 6 is characterized in that, in the pump station according to claim 1, the vertical shaft pump is installed with a difference in the suction water level.

請求項１に記載の発明によれば、ポンプ吸込水槽に連通する水路にセミクローズタイプ又はクローズタイプ水槽を複数個直列に設け、各セミクローズタイプ又はクローズタイプ水槽に立軸ポンプを設置し、ポンプ付近に自由表面を持たない構造としたので、ポンプ上流側の手前に有害な空気吸込渦の発生を防止できる。 According to the first aspect of the present invention, a plurality of semi-closed type or closed type water tanks are provided in series in a water channel communicating with the pump suction water tank, and a vertical shaft pump is installed in each semi-closed type or closed type water tank, and the vicinity of the pump Since the structure does not have a free surface, harmful air suction vortices can be prevented from occurring upstream of the upstream side of the pump.

請求項２に記載の発明によれば、各セミクローズタイプ又はクローズタイプ水槽の底面に渦防止装置を配置したので、水中渦の発生を防止できる。 According to invention of Claim 2, since the vortex prevention apparatus has been arrange | positioned in the bottom face of each semi-closed type or closed type water tank, generation | occurrence | production of underwater vortex can be prevented.

請求項３に記載の発明によれば、ポンプ吸込水槽に連通する水路にセミクローズタイプ又はクローズタイプ水槽を複数個直列に設け、各セミクローズタイプ又はクローズタイプ水槽にコラム形水中モータポンプ設置し、ポンプ付近に自由表面を持たない構造としたので、請求項１に記載の発明と同様、ポンプ上流側の手前に有害な空気吸込渦の発生を防止できる。 According to the invention of claim 3, a plurality of semi-closed type or closed type water tanks are provided in series in a water channel communicating with the pump suction water tank, and a column type submersible motor pump is installed in each semi-closed type or closed type water tank. Since the structure has no free surface in the vicinity of the pump, it is possible to prevent the generation of harmful air suction vortex in front of the upstream side of the pump, as in the first aspect of the invention.

請求項４に記載の発明によれば、ポンプ吸込水槽に連通する水路の水平方向幅又は垂直方向幅を上流側から下流側にいくに従い狭くしたので、水の流れが概ね増速するから、渦の発生を防止できる。これに対してポンプ吸込水槽の幅が均一の場合は、ポンプ複数台の運転時は、水が上流側ポンプを通って下流側ポンプに流れるところで流速が減速し、渦が発生しやすくなる。 According to the fourth aspect of the present invention, since the horizontal width or vertical width of the water channel communicating with the pump suction water tank is narrowed from the upstream side to the downstream side, the flow of water generally increases. Can be prevented. On the other hand, when the width of the pump suction water tank is uniform, the flow rate is reduced where water flows to the downstream pump through the upstream pump during operation of a plurality of pumps, and vortices are likely to be generated.

請求項５に記載の発明によれば、複数台の各ポンプの吐出口に接続された吐出弁及び吐出管を設置床に水路に直行する方向に配置したので、吐出弁及び吐出管が互いに干渉することなく、配置することができる。 According to the fifth aspect of the present invention, since the discharge valves and discharge pipes connected to the discharge ports of the plurality of pumps are arranged in the direction perpendicular to the water channel on the installation floor, the discharge valves and the discharge pipes interfere with each other. Can be arranged without.

請求項６に記載の発明によれば、立軸ポンプをその吸込水位レベルに差異を設けて設置したので、複数台の立軸ポンプが同時に水を吸込むことがなく、急激な排水停止による水位の急激な変動を阻止でき、サージ現象と負荷変動が緩和できる。 According to the invention described in claim 6, since the vertical shaft pumps are installed with a difference in the suction water level level, a plurality of vertical shaft pumps do not suck water at the same time, and the water level suddenly stops due to a sudden drain stop. Fluctuation can be prevented and surge phenomenon and load fluctuation can be reduced.

以下、本発明の実施の形態例を図面に基いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図５は本発明に係るポンプ場の構成を示す図である。図示するように、本ポンプ場はポンプ吸込水槽１に連通する水路１’にセミクローズタイプ水槽２を複数個（図では２個）を直列に設け、各セミクローズタイプ水槽２に立軸斜流ポンプ３を設置している。これにより、立軸斜流ポンプ３付近に自由表面を持たない構造となるので、ポンプ上流側の手前に発生する有害な空気吸込渦の発生を防止できる。 FIG. 5 is a diagram showing the configuration of a pumping station according to the present invention. As shown in the figure, this pumping station has a plurality of semi-closed water tanks 2 (two in the figure) arranged in series in a water channel 1 ′ communicating with the pump suction water tank 1, and a vertical shaft diagonal flow pump in each semi-closed water tank 2. 3 is installed. Thereby, since it becomes a structure which does not have a free surface in the vicinity of the vertical shaft mixed-flow pump 3, it is possible to prevent generation of harmful air suction vortices generated before the pump upstream side.

また、図６に示すように、各セミクローズタイプ水槽２の底面に渦防止装置（ここでは十字スプリッタ）４を設ける。これにより、各セミクローズタイプ水槽２の底面（側面）から発生する水中渦の発生を防止することができ、上記空気吸込渦の発生防止に加え水中渦の発生を防止できるから、渦発生防止の作用は更に向上する。 Further, as shown in FIG. 6, a vortex prevention device (here, a cross splitter) 4 is provided on the bottom surface of each semi-closed water tank 2. As a result, the generation of underwater vortices generated from the bottom surface (side surface) of each semi-closed water tank 2 can be prevented, and the generation of underwater vortices can be prevented in addition to the generation of air suction vortices. The action is further improved.

図５及び図６では各セミクローズタイプ水槽２に立軸斜流ポンプ３を設置しているが、図７に示すように、ポンプ吸込水槽１に連通する水路１’に複数のクローズタイプ水槽２’を複数個（図では２個）を直列に設け、各クローズタイプ水槽２’に立軸斜流ポンプ３を設置してもよい。これにより立軸斜流ポンプ３付近に全く自由表面を持たないので、ポンプ上流側の手前に発生する有害な空気吸込渦の発生を防止できる。また、図８に示すように、各クローズタイプ水槽２’の底面に渦防止装置４を設けることにより、渦発生防止の作用は更に向上する。 5 and 6, the vertical shaft diagonal flow pump 3 is installed in each semi-closed type water tank 2, but as shown in FIG. 7, a plurality of closed type water tanks 2 ′ are connected to a water channel 1 ′ communicating with the pump suction water tank 1. A plurality of (two in the figure) may be provided in series, and the vertical-shaft mixed flow pump 3 may be installed in each closed-type water tank 2 ′. As a result, there is no free surface near the vertical-shaft mixed-flow pump 3, so that it is possible to prevent generation of harmful air suction vortices generated before the upstream side of the pump. Moreover, as shown in FIG. 8, the action of preventing vortex generation is further improved by providing the vortex prevention device 4 on the bottom surface of each closed type water tank 2 '.

図９は図５乃至図８に示す構成のポンプ場のセミクローズタイプ水槽２又はクローズタイプ水槽２’の上部に設けられた機器設置床に配置された配置機器の平面配置例を示す図である。図示するように、機器設置床９のセミクローズタイプ水槽２又はクローズタイプ水槽２’の真上に位置する部分には出力軸が各立軸斜流ポンプ３の主軸に連結される減速機５が配置され、各減速機５に動力を与える駆動機６がポンプ吸込水槽１に連通する水路１’に直交する状態で配置され、また、立軸斜流ポンプ３の吐出口に接続された吐出管７及び吐出弁８も該水路１’に直交する状態で配置されている。即ち、吐出管７及び吐出弁８は水路１’に直交する状態で配置されている。 FIG. 9 is a diagram showing an example of a planar arrangement of arrangement devices arranged on the equipment installation floor provided on the upper part of the semi-closed water tank 2 or the closed type water tank 2 ′ of the pump station having the configuration shown in FIGS. . As shown in the figure, a speed reducer 5 whose output shaft is connected to the main shaft of each vertical-shaft mixed-flow pump 3 is disposed in a portion of the equipment installation floor 9 located immediately above the semi-closed water tank 2 or the closed type water tank 2 ′. A drive unit 6 for powering each speed reducer 5 is arranged in a state orthogonal to the water channel 1 ′ communicating with the pump suction water tank 1, and a discharge pipe 7 connected to a discharge port of the vertical shaft diagonal flow pump 3 and The discharge valve 8 is also arranged in a state orthogonal to the water channel 1 ′. That is, the discharge pipe 7 and the discharge valve 8 are arranged in a state orthogonal to the water channel 1 ′.

図１０は図５乃至図８に示す構成のポンプ場のセミクローズタイプ水槽２クローズタイプ水槽２’の上部に設けられた機器設置床に配置された配置機器の平面配置例を示す図である。図示するように、駆動機６がポンプ吸込水槽１に連通する水路１’上又はその延長上に配置され、立軸斜流ポンプ３の吐出口に接続された吐出管７及び吐出弁８は該水路１’に直交する状態で配置されている。即ち、吐出管７及び吐出弁８は水路１’に直交するような状態で配置されている。 FIG. 10 is a diagram showing an example of a planar arrangement of arrangement devices arranged on the equipment installation floor provided on the upper part of the semi-closed water tank 2 closed type water tank 2 ′ of the pump station having the configuration shown in FIGS. 5 to 8. As shown in the figure, a discharge pipe 7 and a discharge valve 8 connected to a discharge port of a vertical shaft diagonal flow pump 3 are arranged on a water channel 1 ′ communicating with the pump suction water tank 1 or an extension thereof. It is arranged in a state orthogonal to 1 ′. That is, the discharge pipe 7 and the discharge valve 8 are arranged so as to be orthogonal to the water channel 1 ′.

図９又は図１０に示すように、各立軸斜流ポンプ３の吐出口に接続される吐出管７及び吐出弁８をポンプ吸込水槽１に連通する水路１’に直交する状態で配置することにより、これら各立軸斜流ポンプ３に対応する吐出管７及び吐出弁８は互いに干渉することなく機器設置床９に配置することが容易となる。 As shown in FIG. 9 or FIG. 10, by disposing the discharge pipe 7 and the discharge valve 8 connected to the discharge port of each vertical shaft diagonal flow pump 3 in a state orthogonal to the water channel 1 ′ communicating with the pump suction water tank 1. The discharge pipe 7 and the discharge valve 8 corresponding to each of the vertical-shaft mixed flow pumps 3 can be easily arranged on the equipment installation floor 9 without interfering with each other.

上記構成のポンプ場において、駆動機６にはガスタービンやディーゼルエンジン等の内燃機関、又は電動機等が使用され、該駆動機６の回転動力が減速機を介して立軸斜流ポンプ３に伝達され、ポンプが回転することにより、ポンプ吸込口３ａから吸い込まれた水は吐出弁８及び吐出管７を通って吐出され、所定の場所（例えば吐出水槽）に送水される。このとき、上記のように立軸斜流ポンプ３はセミクローズタイプ水槽２又はクローズタイプ水槽２’に設置され、ポンプ付近に自由表面を持たない構造となるので、ポンプ上流側の手前に発生する有害な空気吸込渦の発生を防止できる。また、セミクローズタイプ水槽２又はクローズタイプ水槽２’の底面に渦防止装置４を設けているので、水中渦の発生を防止することができる。 In the pump station having the above-described configuration, an internal combustion engine such as a gas turbine or a diesel engine, or an electric motor is used as the drive machine 6, and the rotational power of the drive machine 6 is transmitted to the vertical shaft diagonal flow pump 3 through the reduction gear. As the pump rotates, the water sucked from the pump suction port 3a is discharged through the discharge valve 8 and the discharge pipe 7, and is sent to a predetermined place (for example, a discharge water tank). At this time, as described above, the vertical-shaft mixed-flow pump 3 is installed in the semi-closed water tank 2 or the closed-type water tank 2 ′ and has a structure having no free surface in the vicinity of the pump. Can prevent the occurrence of air suction vortex. Further, since the vortex preventing device 4 is provided on the bottom surface of the semi-closed water tank 2 or the closed type water tank 2 ', it is possible to prevent the generation of underwater vortices.

図１１は本発明に係るポンプ場の構成を示す図である。図示するように、本ポンプ場はポンプ吸込水槽１に連通する水路１’にセミクローズタイプ水槽２を複数個（図では２個）を直列に設け、各セミクローズタイプ水槽２にコラム形水中モータポンプ１０を設置している。これにより、コラム形水中モータポンプ１０のポンプ付近に自由表面を持たない構造となるので、ポンプ上流側の手前に発生する有害な空気吸込渦の発生を防止できる。また、図示するように、セミクローズタイプ水槽の底面に渦防止装置（ここでは十字スプリッタ）４を設ければ、上記と同様、各セミクローズタイプ水槽２の底面から発生する水中渦の発生を防止することがでる。なお、図示は省略するが、水路１’に図７に示すようなクローズタイプ水槽を直列に複数個設け、各クローズタイプ水槽にコラム形水中モータポンプ１０を設置してもよい。 FIG. 11 is a diagram showing a configuration of a pumping station according to the present invention. As shown in the figure, this pump station is provided with a plurality of (in the figure, two) semi-closed water tanks 2 in series in a water channel 1 ′ communicating with the pump suction water tank 1, and each semi-closed water tank 2 has a column type submersible motor. A pump 10 is installed. Thereby, since it becomes a structure which does not have a free surface near the pump of the column type submersible motor pump 10, generation | occurrence | production of the harmful air suction vortex which occurs before the pump upstream side can be prevented. Further, as shown in the figure, if a vortex prevention device (here, a cross splitter) 4 is provided on the bottom surface of the semi-closed water tank, the generation of underwater vortices generated from the bottom surface of each semi-closed water tank 2 is prevented as described above. You can do it. Although not shown, a plurality of closed type water tanks as shown in FIG. 7 may be provided in series in the water channel 1 ′, and the column type submersible motor pump 10 may be installed in each closed type water tank.

なお、図示は省略するが、コラム形水中モータポンプ１０の吐出口に接続された吐出管及び吐出弁は該水路１’に直交する状態で配置することにより、これらを互いに干渉することなく、配置できる。 Although illustration is omitted, the discharge pipe and the discharge valve connected to the discharge port of the column type submersible motor pump 10 are arranged in a state orthogonal to the water channel 1 ′ so that they are arranged without interfering with each other. it can.

図１２は本発明に係るポンプ場の構成を示す図で、図１０（ａ）は側断面図、図１０（ｂ）はＡ−Ａ断面図である。図示するように、本ポンプ場では、ポンプ吸込水槽１に連通する水路１’の平面形状をその上流側から下流側に行くに従ってその水平方向の幅を狭くしている。そして該水路１’に直列に複数のセミクローズタイプ水槽２を設け、各セミクローズタイプ水槽２に立軸斜流ポンプ３を設置している。即ち、セミクローズタイプ水槽２の水平方向幅を上流側から下流側にいくに従い狭くしている。 FIG. 12 is a diagram showing the configuration of the pumping station according to the present invention, FIG. 10 (a) is a side sectional view, and FIG. 10 (b) is an AA sectional view. As shown in the figure, in this pump station, the horizontal width of the planar shape of the water channel 1 ′ communicating with the pump suction water tank 1 is narrowed from the upstream side to the downstream side. A plurality of semi-closed water tanks 2 are provided in series in the water channel 1 ′, and a vertical shaft diagonal flow pump 3 is installed in each semi-closed water tank 2. In other words, the horizontal width of the semi-closed water tank 2 is narrowed from the upstream side to the downstream side.

このようにセミクローズタイプ水槽２が設けられる水路１’の水平方向幅を上流側から下流側にいくに従い狭くすることにより、水路１’で水の流れが概ね増速するから、渦の発生を防止できる。なお、図示は省略するが、ここでもセミクローズタイプ水槽２の底面に渦防止装置を設ければ、セミクローズタイプ水槽２の底面から発生する水中渦の発生を防止することがでる。これに対してポンプ吸込水槽の幅が均一の場合は、ポンプ複数台の運転時は、水が上流側ポンプを通って下流側ポンプに流れるところで流速が減速し、渦が発生しやすくなる。なお、セミクローズタイプ水槽２に設置するポンプとしては、図９に示すような、コラム形水中モータポンプ１０でもよい。なお、図示は省略するが、水路１’に図７に示すようなクローズタイプ水槽を直列に複数個設け、各クローズタイプ水槽に立軸斜流ポンプを設置してもよい。 In this way, by narrowing the horizontal width of the water channel 1 ′ where the semi-closed water tank 2 is provided from the upstream side to the downstream side, the flow of water generally increases in the water channel 1 ′. Can be prevented. In addition, although illustration is abbreviate | omitted, generation | occurrence | production of the underwater vortex which generate | occur | produces from the bottom face of a semi-closed type water tank 2 can be prevented if a vortex prevention apparatus is provided in the bottom face of the semi-close type water tank 2 here. On the other hand, when the width of the pump suction water tank is uniform, the flow rate is reduced where water flows to the downstream pump through the upstream pump during operation of a plurality of pumps, and vortices are likely to be generated. The pump installed in the semi-closed water tank 2 may be a column type submersible motor pump 10 as shown in FIG. Although not shown, a plurality of closed type water tanks as shown in FIG. 7 may be provided in series in the water channel 1 ′, and a vertical shaft diagonal flow pump may be installed in each closed type water tank.

図１３は本発明に係るポンプ場の構成を示す図である。図示するように、ポンプ吸込水槽に連通する水路１’の垂直方向の幅を上流側から下流側にいくに従い狭くし、該水路１’に複数個（図では２個）のセミクローズタイプ水槽２を直列に配置し、各セミクローズタイプ水槽２に立軸斜流ポンプ３を設置している。即ち、セミクローズタイプ水槽２の垂直方向の幅を上流側から下流側にいくに従い狭くしている。これにより水路１’で水の流れが概ね増速するから、渦の発生を防止できる。ここでもセミクローズタイプ水槽２の底面に渦防止装置４を設けることにより、セミクローズタイプ水槽２の底面から発生する水中渦の発生を防止することがでる。なお、セミクローズタイプ水槽２に設置するポンプとしては、図１１に示すような、コラム形水中モータポンプ１０でもよい。 FIG. 13 is a diagram showing a configuration of a pumping station according to the present invention. As shown in the figure, the vertical width of the water channel 1 ′ communicating with the pump suction water tank is narrowed from the upstream side to the downstream side, and a plurality (two in the figure) of semi-closed type water tanks 2 are provided in the water channel 1 ′. Are arranged in series, and a vertical-shaft mixed-flow pump 3 is installed in each semi-closed water tank 2. That is, the width of the semi-closed water tank 2 in the vertical direction is narrowed from the upstream side to the downstream side. As a result, the flow of water substantially increases in the water channel 1 ′, so that the generation of vortices can be prevented. Here, by providing the vortex preventing device 4 on the bottom surface of the semi-closed water tank 2, it is possible to prevent the generation of underwater vortices generated from the bottom surface of the semi-closed water tank 2. The pump installed in the semi-closed water tank 2 may be a column type submersible motor pump 10 as shown in FIG.

図１４は本発明に係るポンプ場の構成を示す図である。図示するように、ポンプ吸込水槽に連通する水路１’セミクローズタイプ水槽２を複数個（図では３個）を直列に設け、各セミクローズタイプ水槽２に立軸斜流ポンプ３を各吸込水位レベルをその吸込水位レベルに差異を設けて設置している。これにより複数台の立軸ポンプが同時に水を吸込むことがなく、急激な排水停止による水位の急激な変動を阻止でき、サージ現象と負荷変動が緩和できる。なお、図示は省略するが、水路１’に図７に示すようなクローズタイプ水槽を直列に複数個設け、各クローズタイプ水槽に立軸斜流ポンプを設置してもよい。更に、図で吸込みレベルの高さ位置を異ならせているが、吸込みレベルの高さ位置は同一とし、羽根車の位置を異ならせるなどし、少なくとも１台の吸込み開始時間が異なるように設置すればよい。 FIG. 14 is a diagram showing a configuration of a pumping station according to the present invention. As shown in the figure, a plurality of water passages 1 'semi-closed type water tanks 2 (three in the figure) communicating with the pump suction water tanks are provided in series, and each of the semi-closed type water tanks 2 is provided with a vertical shaft diagonal flow pump 3 at each suction water level. Is installed with a difference in the suction water level. As a result, a plurality of vertical pumps do not suck water at the same time, and can prevent sudden fluctuations in the water level due to sudden stoppage of drainage, thereby reducing surge and load fluctuations. Although not shown, a plurality of closed type water tanks as shown in FIG. 7 may be provided in series in the water channel 1 ′, and a vertical shaft diagonal flow pump may be installed in each closed type water tank. Furthermore, although the suction level height position is varied in the figure, the suction level height position is the same, the impeller position is varied, etc., so that at least one suction start time is different. That's fine.

以上本発明の実施形態を説明したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲、及び明細書と図面に記載された技術的思想の範囲内において種々の変形が可能である。例えばポンプ吸込水槽に連通する水路に直列に設ける水槽をセミクローズタイプ水槽としているが、クローズドタイプ水槽でもよいことは当然である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, although the water tank provided in series with the water channel communicating with the pump suction water tank is a semi-closed water tank, it is a matter of course that a closed type water tank may be used.

従来のポンプ場のポンプ吸込水槽とポンプの配置を示す図である。It is a figure which shows arrangement | positioning of the pump suction water tank and pump of the conventional pump station. 従来のポンプ場のポンプ吸込水槽とポンプの配置を示す図である。It is a figure which shows arrangement | positioning of the pump suction water tank and pump of the conventional pump station. 従来のポンプ場のポンプ吸込水槽とポンプの配置を示す図である。It is a figure which shows arrangement | positioning of the pump suction water tank and pump of the conventional pump station. 従来のポンプ場の機器設置床の配置状態を示す図である。It is a figure which shows the arrangement | positioning state of the equipment installation floor of the conventional pump station. 本発明に係るポンプ場の構成例を示す図である。（実施例１）It is a figure which shows the structural example of the pump station which concerns on this invention. (Example 1) 本発明に係るポンプ場の構成例を示す図である。（実施例１）It is a figure which shows the structural example of the pump station which concerns on this invention. (Example 1) 本発明に係るポンプ場の構成例を示す図である。（実施例１）It is a figure which shows the structural example of the pump station which concerns on this invention. (Example 1) 本発明に係るポンプ場の構成例を示す図である。（実施例１）It is a figure which shows the structural example of the pump station which concerns on this invention. (Example 1) 本発明に係るポンプ場の機器設置床の機器配置構成例を示す図である。It is a figure which shows the equipment arrangement structural example of the equipment installation floor of the pump station which concerns on this invention. 本発明に係るポンプ場の機器設置床の機器配置構成例を示す図である。It is a figure which shows the equipment arrangement structural example of the equipment installation floor of the pump station which concerns on this invention. 本発明に係るポンプ場の構成例を示す図である。（実施例２）It is a figure which shows the structural example of the pump station which concerns on this invention. (Example 2) 本発明に係るポンプ場の構成例を示す図である。（実施例３）It is a figure which shows the structural example of the pump station which concerns on this invention. Example 3 本発明に係るポンプ場の構成例を示す図である。（実施例４）It is a figure which shows the structural example of the pump station which concerns on this invention. Example 4 本発明に係るポンプ場の構成例を示す図である。（実施例４）It is a figure which shows the structural example of the pump station which concerns on this invention. Example 4

Explanation of symbols

１ポンプ吸込水槽
２セミクローズタイプ水槽
２’ クローズタイプ水槽
３立軸斜流ポンプ
４渦防止装置
５減速機
６駆動機
７吐出管
８吐出弁
９機器設置床
１０コラム形水中モータポンプ DESCRIPTION OF SYMBOLS 1 Pump suction water tank 2 Semi-closed type water tank 2 'Close type water tank 3 Vertical shaft diagonal flow pump 4 Eddy prevention device 5 Reduction gear 6 Drive machine 7 Discharge pipe 8 Discharge valve 9 Equipment installation floor 10 Column type submersible motor pump

Claims

In a pumping station with a pump installed in the pump suction tank,
A pumping station, wherein a plurality of semi-closed type or closed type water tanks are provided in series in a water channel communicating with the pump suction water tank, and a vertical shaft pump is installed in each of the semi-closed type or closed type water tanks.

The pump station according to claim 1,
A pumping station, wherein a vortex prevention device is arranged on the bottom surface of each semi-closed type or closed type water tank.

The pump station according to claim 1,
The pumping station, wherein the vertical shaft pump is a column type submersible motor pump.

The pumping station according to any one of claims 1 to 3,
A pumping station characterized in that a horizontal width or a vertical width of a water channel communicating with the pump suction water tank is narrowed from an upstream side to a downstream side.

In the pumping station according to any one of claims 1 to 4,
A pumping station, wherein discharge valves and discharge pipes connected to discharge ports of the plurality of pumps are arranged on the upper floor of the semi-closed type or closed type water tank in a direction perpendicular to the water channel.

The pump station according to claim 1,
A pumping station characterized by installing vertical shaft pumps with different levels of suction water level.