JP2004270474A - Pump device - Google Patents

Pump device Download PDF

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Publication number
JP2004270474A
JP2004270474A JP2003059425A JP2003059425A JP2004270474A JP 2004270474 A JP2004270474 A JP 2004270474A JP 2003059425 A JP2003059425 A JP 2003059425A JP 2003059425 A JP2003059425 A JP 2003059425A JP 2004270474 A JP2004270474 A JP 2004270474A
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JP
Japan
Prior art keywords
discharge
pump
pump device
tank
amount
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003059425A
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Japanese (ja)
Inventor
Shiro Mimura
史郎 三村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to JP2003059425A priority Critical patent/JP2004270474A/en
Publication of JP2004270474A publication Critical patent/JP2004270474A/en
Pending legal-status Critical Current

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  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To change the actual lifting range as needed and to increase a discharge amount to equal to or more than the rated amount. <P>SOLUTION: By providing a discharging position adjustment means (extending/contracting member 11) to a discharge pipe 43 and extending/contracting the discharging position adjustment means 11 in the depth direction of a flow-out tank 44, a discharging position 11a is positioned at water-level or lower in the flow-out tank 44 and a syphon is formed in the discharge pipe 43, and the actual lifting range is changed (reduced) within the area from a top part bent part 43b to the bottom part of the flow-out tank 44. Water level data of the flow-out tank 44 are detected by using a process controller, and the extending/contracting member 11 is extendingly/contractingly controlled based on the detected result. VVVF is connected to a motor 42 of a pump main body 40, change in current of the VVVF is detected, a pumping amount of the pump main body 40 is calculated, and output of the motor 42 is controlled based on the calculation result. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、吐出量を変化させることが可能なポンプ装置であって、例えば上水施設,下水施設や大深度地下に建設された排貯水機能を有する洪水対策用施設等に適用されるポンプ装置に関するものである。
【0002】
【従来の技術】
流体を移送すること、例えば低所に位置する流体(例えば、水)を高所に移送することが可能なポンプ装置は、上水施設,下水施設や大深度地下に建設された排貯水機能を有する洪水対策用施設等に適用されている。
【0003】
図4は、一般的に知られているポンプ装置の一例を示す概略説明図である。図4において、符号40はポンプ槽(例えば、低所に位置する槽)41内の水を揚水することが可能なポンプ本体(例えば、立軸式の渦巻ポンプ)を示すものであり、例えばポンプ槽41内の水を吸込むための管路(以下、吸込管路と称する)40a,該吸込管路40a内に配置されたプロペラシャフト40bとから構成され、そのプロペラシャフト40bには例えば該プロペラシャフト40bを駆動するためのモータ(例えば、交流モータ)42がコネクタ手段42aを介して接続される。符号43は前記吸込管路40aに連通された吐出管路を示すものであり、前記ポンプ本体40で吸込まれた水を流出槽(流出渠;例えば、高所に位置する槽)44に吐出させるものである。
【0004】
前記の吸込管路40aや吐出管路43には、必要に応じて、例えば吐出管路43内の水の逆流を防止するための逆止弁(例えば、スルース弁,チェック弁)43aや、ポンプ装置の揚水量を調整することが可能な開閉弁(図示省略)等が備えられる。
【0005】
図4に示したようなポンプ装置に使用するポンプ本体40の規模等(出力,種類等)は、そのポンプ装置の目的とする揚水量、すなわち吐出管路43からの吐出量(Q)に応じて選定される。この吐出量Qは、主にポンプ装置における実揚程(h;図4中ではポンプ槽41水面から吐出管路43の頂部曲がり部43bまでの間の垂直距離),管路抵抗(パイプロス)を要素とした全揚程(H)によって変化する。
【0006】
前記の実揚程h,管路抵抗は、例えばポンプ本体40の稼働率(例えば、プロペラシャフト40bの回転速度)や開閉弁の開度等を変更しない限り、機械的構造上の点で一義的に一定となる。また、前記実揚程hは、ポンプ槽41の深さの範囲内で変化する
例えば、図4に示したポンプ装置の管路抵抗(開閉弁を備えてない場合、または開閉弁の開度が100%の場合の管路抵抗)をPα,ポンプ本体40の出力が100%の場合(例えば、プロペラシャフト40bの回転速度が100%速度の場合)のQ−H特性をL100%とすると、図5のポンプ特性曲線に示すようにQ−H特性曲線L100%と管路抵抗曲線Pαとの交点Taの位置が吐出量(Q)となる。
【0007】
前記のポンプ本体40の出力をn%(nは0<n<100を満たす実数)に制限すると、その際のポンプ本体40のQ−H特性曲線Ln%と管路抵抗曲線Pαとが交点Tbにて交差し、前記の吐出量Qは減少して吐出量Qとなる。また、例えば吸込管路40aや吐出管路43に備えられた開閉弁の開度を調整した場合においても、その際の管路抵抗曲線PβとQ−H特性曲線L100%とが交点Tcにて交差し、前記の吐出量Qは減少して吐出量Qとなる。このように吐出量を減少させる作業は、例えばポンプ槽41内の水量が少ない場合やポンプ装置の待機運転時に行われる。
【0008】
なお、図4に示したようなポンプ装置においては、例えば特開平05−171661号公報に示すように、予め吐出管路の端部(図4中では吐出口43c)を流出槽の水位よりも低い位置に配置することにより、その吐出管路内にサイホンを形成した構成が知られている。この公報では、前記吐出管路におけるサイホンを大気と連通させたり高圧空気を吹き込むことにより、吐出量を減少させる方法が開示されている。
【0009】
【特許文献1】
特開平05−171661号公報(段落[0006],[0007])。
【0010】
【発明が解決しようとする課題】
図4や前記の公報に示した構成のポンプ装置において、例えばポンプ槽41内に対して予期しない大量の水等が流入(例えば、洪水対策用施設の場合には大量の雨水が流入)し水位が上昇した場合には、吐出量を定格以上(計画当初の範囲を超える吐出量)にして揚水することが要求される。
【0011】
しかしながら、前記のポンプ装置では、ポンプ本体40のモータ42等を例えば交換して大型化しない限り、吐出量を定格以上(例えば、図5においてはQよりも大きい吐出量)にすることは物理的に不可能である。
【0012】
本発明は、前記課題に基づいてなされたものであり、必要に応じて実揚程を変化させ吐出量を定格以上に調整することができ、ポンプ本体の駆動源の過負荷を防止することが可能なポンプ装置を提供することにある。
【0013】
【課題を解決するための手段】
本発明は、前記課題の解決を図るために、請求項1記載の発明は、ポンプ槽(例えば、低所に位置するポンプ槽等)内の流体(例えば、水等)を吸込むポンプ本体(例えば、揚水管路,プロペラシャフト,駆動源から成るポンプ本体等)と、その吸込まれた流体を流出槽(例えば、高所に位置する流出槽)に吐出する吐出管路と、を備えたポンプ装置において、流出槽に対する流体の吐出位置を調整する手段を備え(例えば、吐出管路に備え)、その吐出位置が流出槽の水位以下となるように調整して、吐出管路にサイホンを形成することが可能なことを特徴とする。
【0014】
請求項2記載の発明は、前記の吐出位置調整手段において、前記流出槽の深さ方向へ伸縮することが可能な手段から成ることを特徴とする。
【0015】
請求項3記載の発明は、前記の吐出位置調整手段において、複数個の配管をそれぞれ軸方向に対し摺動自在に貫装して構成、または可動式管継手から構成され、前記吐出管路の一部に連通して備えられたことを特徴とする。
【0016】
請求項4記載の発明は、前記ポンプ本体の駆動源(例えば、交流モータ)の出力をVVVFにより制御することを特徴とする。
【0017】
前記の公報に示したポンプ装置の場合、例えばポンプ本体のモータの交換等をしない限り、実揚程を2パターン(サイホンを形成した場合とサイホンを防止した場合)以外で変化させることはできない。これに対して本発明によれば、前記の公報と比較して広い範囲で、実揚程を任意に変化させることができる。
【0018】
【発明の実施の形態】
以下、本発明の実施の形態におけるポンプ装置を図面等に基づいて詳細に説明する。なお、図4,図5に示すものと同様なものには同一符号等を用い、その詳細な説明を省略する。
【0019】
本発明者は、例えば図4に示したようなポンプ装置において、そのポンプ装置から流体が吐出する位置(以下、吐出位置と称する)、すなわち吐出口43cが流出槽44の水位よりも低く配置されている場合には、その吐出管路43にサイホンが形成され実揚程が変化することに着目した。すなわち、本発明は、流出槽に対する流体の吐出位置を調整することが可能な手段(以下、吐出位置調整手段と称する)を備えることにより、その吐出位置を必要に応じて流出槽の水位以下に位置させ、吐出管路内に対してサイホンを形成できるようにしたものである。
【0020】
図1の概略説明図は、本実施の形態における吐出位置調整手段を備えたポンプ装置の一例を示すものである。図1において、符号11は、吐出管路43の端部(吐出口43c)に設けられ流出槽44の深さ方向に伸縮(例えば、流出槽44の開口部から底部の間を伸縮)可能な部材(以下、伸縮部材と称する)を示すものであり、径の異なる複数個の配管をそれぞれ軸方向に対し摺動自在に貫装して構成される。
【0021】
符号12は前記伸縮部材11を流出槽44の深さ方向に伸縮させるモータ(例えば、ステッピングモータ)を示すものである。このモータ12の駆動により伸縮部材11を伸縮させることにより、図示するように吐出位置11aが流出槽44の水位以下に位置し、吐出管路43にサイホンが形成される。
【0022】
前記のように伸縮部材11によってサイホンが形成された場合、ポンプ装置の実揚程hはポンプ槽41水面から吐出管路43の流出槽44の水面までの間の垂直距離となる。すなわち、前記の流出槽44の水位変化に応じて伸縮部材11を伸縮させることにより、頂部曲がり部43bから流出槽44の底部まで間の範囲内で実揚程を変化(縮小)させることが可能となる。
【0023】
例えば、図1に示したポンプ装置において、伸縮部材11の吐出位置11aを流出槽44の水位よりも高く位置させた場合には、図2に示すように(図5と同様に)Q−H特性曲線L100%と管路抵抗曲線Pαとの交点Taの位置が吐出量(Q)となる。
【0024】
そして、前記の管路部材11の吐出位置11aを流出槽44の水位よりも低く位置させ吐出管路43にサイホンを形成した場合には、実揚程の減少(図2中ではhからhに減少)および管路抵抗の変化(図2中では管路抵抗曲線PαからPγに変化)に伴って吐出量Qは増加し、管路抵抗曲線PγとQ−H特性曲線L100%との交点Tdが吐出量(Q)となる。
【0025】
前記のサイホンが形成された状態にて前記の吐出量を定格以下(吐出量Q以下)にする場合には、例えばポンプ本体40の出力をn%に制限することにより、その際のポンプ本体40のQ−H特性曲線Ln%と管路抵抗曲線Pγとが交点Teにて交差し、前記の吐出量Qは減少する(図2中では吐出量Qとなる)。これにより、モータ42が過負荷になることを防止できる。
【0026】
また、例えばポンプ槽41内の水量が少なく吐出量を制限する場合やポンプ装置を待機運転させる場合には、前記伸縮部材11の吐出位置11aを流出槽44の水位よりも高く位置させたり、吸込管路40aや吐出管路43に備えられた開閉弁の開度を調整したり、前記ポンプ本体40の出力をさらに制限する。
【0027】
図3の概略説明図は、図1のポンプ装置を運転制限する方法の一例を示すものである。図3において、符号30はポンプ装置を制御するプロセスコントローラ(PLC)、符号31は流出槽44用の水位計、符号32はポンプ本体40のモータ42に接続されたVVVF(Variable Voltage Variable Frequency)を示すものである。
【0028】
前記プロセスコントローラ30にて、前記水位計31で得られたデータ(水位データ)を検出し、その検出結果に基づいてモータ12を駆動し伸縮部材11を伸縮(伸縮制御)させることにより、流出槽44に対する吐出位置11aの位置を調整する。また、前記VVVF32の電流変化を検出してポンプ本体40による揚水量を算出し、その算出結果に基づいてモータ42に対するVVVF32の出力制御(速度制御)を行うことにより、ポンプ本体40による揚水量を調整する。
【0029】
以上、本発明において、記載された具体例に対してのみ詳細に説明したが、本発明の技術思想の範囲で多彩な変形および修正が可能であることは、当業者にとって明白なことであり、このような変形および修正が特許請求の範囲に属することは当然のことである。
【0030】
例えば、本実施の形態では、吐出位置調整手段として複数個の配管から成る伸縮部材を吐出管路の端部に連通させて設けた構成を示したが、流出槽に対する流体の吐出位置を調整し吐出管路内にサイホンを形成できる手段であれば、種々の形態(例えば、吐出管路の一部に可動式管継手を設けた構成)のものを適用しても良い。
【0031】
また、前記吐出位置調整手段は、例えば流出槽自体を垂直方向へ移動させ該流出槽に対する流体の吐出位置を調整することにより、吐出管路内にサイホンを形成する構成でも良い。
【0032】
さらに、前記の吐出管路や該吐出管路に連接された吐出位置調整手段には、必要に応じて吐出管路内にサイホンを形成されるように、シール部材等を用いても良い。
【0033】
【発明の効果】
以上示したように本発明によれば、吐出位置調整手段を介して吐出管路にサイホンを形成(必要に応じて形成)し、流出槽の水位に応じて実揚程を変化させることができるため、例えばポンプ槽内において予期しない大量の水等が流入(例えば、洪水対策用施設の場合には大量の雨水が流入)し水位が上昇した場合、その吐出量を定格以上(例えば、計画当初の範囲を超える吐出量)に調整することが可能となる。
【0034】
また、前記サイホンが常に形成されるように吐出位置調整手段を制御し、吐出量を定格以下に調整する場合には、ポンプ本体の駆動源の出力を抑制(過負荷を防止)できるため、ポンプ装置の省電力化およびポンプ能力の暫定的な向上を図ることが可能となる。
【図面の簡単な説明】
【図1】本実施の形態におけるポンプ装置の一例を示す概略説明図。
【図2】図1のポンプ装置の流量(Q)に対する全揚程特性図。
【図3】図1のポンプ装置を運転制限する方法の一例を示す概略説明図。
【図4】一般的なポンプ装置の一例を示す概略説明図。
【図5】一般的なポンプ装置の流量(Q)に対する全揚程特性図。
【符号の説明】
11…伸縮部材(吐出位置調整手段)
11a…吐出位置
12…モータ(伸縮部材11用)
12…外部加熱手段
30…プロセスコントローラ
31…水位計
32…VVVF
40…ポンプ本体
40a…吸込管路
41…ポンプ槽
42…モータ(ポンプ本体40用)
43…吐出管路
43b…頂部曲がり部
44…流出槽
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pump device capable of changing a discharge amount, for example, a pump device applied to a water supply facility, a sewage facility, a flood countermeasure facility having a drainage storage function constructed under a deep underground, and the like. It is about.
[0002]
[Prior art]
2. Description of the Related Art A pump device capable of transferring a fluid, for example, a fluid (for example, water) located at a low place to a high place, has a drainage storage function constructed at a water supply facility, a sewage facility, or a deep underground. It is applied to flood control facilities that have
[0003]
FIG. 4 is a schematic explanatory view showing an example of a generally known pump device. In FIG. 4, reference numeral 40 denotes a pump body (for example, a vertical-type spiral pump) capable of pumping water in a pump tank (for example, a tank located at a low place) 41, for example, a pump tank. The suction pipe 40 includes a pipe (hereinafter, referred to as a suction pipe) 40a for sucking water in the suction pipe 41, and a propeller shaft 40b disposed in the suction pipe 40a. The propeller shaft 40b includes, for example, the propeller shaft 40b. (For example, an AC motor) 42 for driving the motor is connected via a connector means 42a. Reference numeral 43 denotes a discharge pipe connected to the suction pipe 40a, and discharges water sucked by the pump body 40 to an outflow tank (outflow culvert; for example, a tank located at a high place) 44. Things.
[0004]
A check valve (for example, a sluice valve or a check valve) 43a for preventing backflow of water in the discharge pipe 43, a pump 43a, An on-off valve (not shown) capable of adjusting the pumping amount of the device is provided.
[0005]
The size (output, type, etc.) of the pump body 40 used for the pump device as shown in FIG. 4 depends on the target pumping amount of the pump device, that is, the discharge amount (Q) from the discharge pipe 43. Selected. The discharge amount Q mainly includes the actual head (h; vertical distance from the surface of the pump tank 41 to the top bend 43b of the discharge pipe 43 in FIG. 4) and the pipe resistance (pipe loss) in the pump device. And the total head (H).
[0006]
The actual head h and the pipeline resistance are univocally defined in terms of mechanical structure unless the operating rate of the pump body 40 (for example, the rotation speed of the propeller shaft 40b) or the opening degree of the on-off valve is changed. It will be constant. The actual head h varies within the range of the depth of the pump tank 41. For example, the pipe resistance of the pump device shown in FIG. 4 (when no on-off valve is provided, or when the opening of the on-off valve is 100 % When the output of the pump body 40 is 100% (for example, when the rotation speed of the propeller shaft 40b is 100% speed), the QH characteristic is L 100% . the intersections Ta and Q-H characteristic curve L 100% and the flow path resistance curve Pα as shown in the pump characteristic curve 5 is the discharge amount (Q a).
[0007]
When the output of the pump body 40 is limited to n% (n is a real number satisfying 0 <n <100), the QH characteristic curve Ln % of the pump body 40 and the pipeline resistance curve Pα at that time intersect. intersect at Tb, discharge amount Q a of the is the discharge amount Q B decreases. Further, for example, even when the opening degree of the on-off valve provided in the suction line 40a or the discharge line 43 is adjusted, the line resistance curve Pβ and the QH characteristic curve L 100% at that time are located at the intersection Tc. intersect Te, discharge amount Q a of the is the discharge amount Q B decreases. The operation of reducing the discharge amount in this manner is performed, for example, when the amount of water in the pump tank 41 is small or during the standby operation of the pump device.
[0008]
In the pump device as shown in FIG. 4, for example, as shown in Japanese Patent Application Laid-Open No. 05-171661, the end of the discharge pipe (the discharge port 43c in FIG. 4) is set higher than the water level of the outflow tank. A configuration in which a siphon is formed in a discharge pipe by disposing the siphon at a low position is known. This publication discloses a method of reducing the discharge amount by making a siphon in the discharge line communicate with the atmosphere or blowing high-pressure air.
[0009]
[Patent Document 1]
JP 05-171661 A (paragraphs [0006] and [0007]).
[0010]
[Problems to be solved by the invention]
In the pump device having the configuration shown in FIG. 4 or the above publication, an unexpectedly large amount of water or the like flows into the pump tank 41 (for example, a large amount of rainwater flows in the case of a flood countermeasure facility), and the water level rises. When the pressure rises, it is required that the discharge amount be equal to or higher than the rated value (a discharge amount exceeding the initial range of the plan) to pump water.
[0011]
However, in the above pump system, unless large-sized motor 42 of the pump body 40 such as, for example, replacement with more than the rated discharge amount (e.g., greater discharge rate than Q A in FIG. 5) that is physically to Is impossible.
[0012]
The present invention has been made based on the above-mentioned problem, and it is possible to change the actual head as needed to adjust the discharge amount to a rated value or more, and to prevent an overload of the drive source of the pump body. To provide a simple pump device.
[0013]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION In order to solve the above-described problems, the present invention provides a pump body (for example, water) that sucks a fluid (for example, water) in a pump tub (for example, a pump tub located at a low place). Pump apparatus comprising: a pump body including a pumping line, a propeller shaft, and a driving source); and a discharge line for discharging the sucked fluid to an outflow tank (for example, an outflow tank located at a high place). A means for adjusting the discharge position of the fluid to the outflow tank (for example, provided in the discharge pipe), and adjusting the discharge position to be equal to or lower than the water level of the outflow tank to form a siphon in the discharge pipe. It is characterized by being able to.
[0014]
The invention according to claim 2 is characterized in that the discharge position adjusting means comprises means capable of expanding and contracting in the depth direction of the outflow tank.
[0015]
According to a third aspect of the present invention, in the discharge position adjusting means, a plurality of pipes are slidably inserted in the axial direction, respectively, or a movable pipe joint is provided. It is characterized by being provided in communication with a part.
[0016]
The invention described in claim 4 is characterized in that the output of a drive source (for example, an AC motor) of the pump body is controlled by VVVF.
[0017]
In the case of the pump device disclosed in the above publication, the actual head cannot be changed except for two patterns (a case where the siphon is formed and a case where the siphon is prevented) unless the motor of the pump body is replaced, for example. On the other hand, according to the present invention, the actual head can be arbitrarily changed in a wider range as compared with the above publication.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a pump device according to an embodiment of the present invention will be described in detail with reference to the drawings and the like. The same components as those shown in FIGS. 4 and 5 are denoted by the same reference numerals and the like, and detailed description thereof will be omitted.
[0019]
The inventor of the present invention has found that, for example, in a pump device as shown in FIG. 4, a position at which fluid is discharged from the pump device (hereinafter, referred to as a discharge position), that is, a discharge port 43c is disposed lower than the water level of the outflow tank 44. In this case, attention was paid to the fact that a siphon was formed in the discharge conduit 43 and the actual head changed. That is, the present invention includes a means capable of adjusting the discharge position of the fluid with respect to the outflow tank (hereinafter, referred to as a discharge position adjusting means). And a siphon can be formed in the discharge pipe.
[0020]
The schematic explanatory view of FIG. 1 shows an example of a pump device provided with a discharge position adjusting means in the present embodiment. In FIG. 1, reference numeral 11 is provided at an end (discharge port 43 c) of the discharge pipe 43 and can expand and contract in the depth direction of the outflow tank 44 (for example, expand and contract from the opening to the bottom of the outflow tank 44). A member (hereinafter, referred to as an elastic member) is shown, and is configured by penetrating a plurality of pipes having different diameters so as to be slidable in the axial direction.
[0021]
Reference numeral 12 denotes a motor (for example, a stepping motor) that expands and contracts the expandable member 11 in the depth direction of the outflow tank 44. When the telescopic member 11 is expanded and contracted by the drive of the motor 12, the discharge position 11a is positioned below the water level of the outflow tank 44 as shown in the figure, and a siphon is formed in the discharge conduit 43.
[0022]
When a siphon is formed by the elastic member 11 as described above, the actual head h of the pump device is a vertical distance from the water surface of the pump tank 41 to the water surface of the outflow tank 44 of the discharge pipe 43. That is, by expanding and contracting the elastic member 11 according to the change in the water level of the outflow tank 44, the actual head can be changed (reduced) within a range from the top bent portion 43b to the bottom of the outflow tank 44. Become.
[0023]
For example, in the pump device shown in FIG. 1, when the discharge position 11a of the expansion and contraction member 11 is positioned higher than the water level of the outflow tank 44, as shown in FIG. The position of the intersection Ta between the characteristic curve L 100% and the pipeline resistance curve Pα is the discharge amount (Q A ).
[0024]
Then, in the case of forming a siphon in the discharge pipe 43 is positioned lower than the water level in the outflow chamber 44 to the discharge position 11a of the conduit member 11, a decrease in actual head (in h 1 from h is in Figure 2 reduction) and the change in line resistance (in FIG. 2 discharge quantity Q a is increased along with the change in P?) from the pipe resistance curve P.alpha, pipe resistance curve P? and Q-H characteristic curve L 100% and the intersection Td is discharge amount (Q D).
[0025]
When the discharge amount of the following rating in a state in which the siphon is formed (hereinafter discharge amount Q D), for example by limiting the output of the pump body 40 to n%, the pump body when the and the 40 Q-H characteristic curve L n% and the flow path resistance curve Pγ intersect at intersection Te, wherein the discharge rate Q D of decrease (the discharge amount Q a is in Figure 2). This can prevent the motor 42 from being overloaded.
[0026]
Further, for example, when the amount of water in the pump tank 41 is small and the discharge amount is limited, or when the pump device is operated in a standby state, the discharge position 11a of the elastic member 11 is set higher than the water level of the outflow tank 44, The opening degree of the on-off valve provided in the pipeline 40a and the discharge pipeline 43 is adjusted, and the output of the pump body 40 is further restricted.
[0027]
The schematic explanatory diagram of FIG. 3 shows an example of a method for restricting the operation of the pump device of FIG. In FIG. 3, reference numeral 30 denotes a process controller (PLC) for controlling the pump device, reference numeral 31 denotes a water level gauge for the outflow tank 44, and reference numeral 32 denotes a VVVF (Variable Voltage Variable Frequency) connected to a motor 42 of the pump body 40. It is shown.
[0028]
The process controller 30 detects data (water level data) obtained by the water level gauge 31 and drives the motor 12 based on the detection result to expand and contract the expansion and contraction member 11 (expansion and contraction control). The position of the discharge position 11a with respect to 44 is adjusted. Further, the amount of water pumped by the pump body 40 is calculated by detecting a change in the current of the VVVF 32 and calculating the amount of water pumped by the pump body 40, and performing output control (speed control) of the VVVF 32 on the motor 42 based on the calculation result. adjust.
[0029]
As described above, in the present invention, only the described specific examples have been described in detail, but it is apparent to those skilled in the art that various modifications and variations are possible within the technical idea of the present invention. It is obvious that such changes and modifications belong to the scope of the claims.
[0030]
For example, in the present embodiment, as the discharge position adjusting means, a configuration in which a telescopic member composed of a plurality of pipes is provided so as to communicate with the end of the discharge conduit is provided. Various means (for example, a configuration in which a movable pipe joint is provided in a part of the discharge pipe) may be applied as long as a siphon can be formed in the discharge pipe.
[0031]
Further, the discharge position adjusting means may be configured to form a siphon in the discharge conduit by, for example, moving the outflow tank itself in the vertical direction and adjusting the discharge position of the fluid to the outflow tank.
[0032]
Further, a seal member or the like may be used in the discharge pipe and the discharge position adjusting means connected to the discharge pipe so that a siphon is formed in the discharge pipe as needed.
[0033]
【The invention's effect】
As described above, according to the present invention, a siphon can be formed (formed as necessary) in the discharge pipe via the discharge position adjusting means, and the actual head can be changed according to the water level of the outflow tank. For example, when an unexpectedly large amount of water or the like flows into the pump tank (for example, a large amount of rainwater flows in the case of a flood countermeasure facility) and the water level rises, the discharge amount exceeds the rating (for example, at the beginning of the plan). (A discharge amount exceeding the range).
[0034]
In addition, when the discharge position adjusting means is controlled so that the siphon is always formed and the discharge amount is adjusted to the rated value or less, the output of the drive source of the pump body can be suppressed (overload is prevented). It is possible to achieve power saving of the device and provisional improvement of the pump capacity.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view showing an example of a pump device according to the present embodiment.
FIG. 2 is a total head characteristic diagram with respect to a flow rate (Q) of the pump device of FIG. 1;
FIG. 3 is a schematic explanatory view showing an example of a method for restricting the operation of the pump device of FIG. 1;
FIG. 4 is a schematic explanatory view showing an example of a general pump device.
FIG. 5 is a total head characteristic diagram with respect to a flow rate (Q) of a general pump device.
[Explanation of symbols]
11 ... Elastic member (discharge position adjusting means)
11a: Discharge position 12: Motor (for telescopic member 11)
12 external heating means 30 process controller 31 water level gauge 32 VVVF
40 pump main body 40a suction pipe 41 pump tank 42 motor (for pump main body 40)
43 ... discharge line 43b ... top bent section 44 ... outflow tank

Claims (4)

ポンプ槽内の流体を吸込むポンプ本体と、その吸込まれた流体を流出槽に吐出する吐出管路と、を備えたポンプ装置において、
流出槽に対する流体の吐出位置を調整する手段を備え、その吐出位置が流出槽の水位以下となるように調整して、吐出管路にサイホンを形成することが可能なことを特徴とするポンプ装置。
In a pump device including a pump body that sucks a fluid in a pump tank and a discharge pipe that discharges the sucked fluid to an outflow tank,
A pump device comprising means for adjusting a discharge position of a fluid to an outflow tank, wherein the discharge position is adjusted to be equal to or lower than a water level of the outflow tank, and a siphon can be formed in the discharge pipe line. .
前記の吐出位置調整手段は、前記流出槽の深さ方向へ伸縮することが可能な手段から成ることを特徴とする請求項1記載のポンプ装置。2. The pump device according to claim 1, wherein said discharge position adjusting means comprises means capable of expanding and contracting in a depth direction of said outflow tank. 前記の吐出位置調整手段は、複数個の配管をそれぞれ軸方向に対し摺動自在に貫装して構成、または可動式管継手から構成され、
前記吐出管路の一部に連通して備えられたことを特徴とする請求項1または2記載のポンプ装置。
The discharge position adjusting means is configured by penetrating a plurality of pipes slidably in the axial direction, respectively, or is configured by a movable pipe joint,
The pump device according to claim 1, wherein the pump device is provided in communication with a part of the discharge pipe.
前記ポンプ本体の駆動源の出力をVVVFにより制御することを特徴とする請求項1乃至3記載のポンプ装置。4. The pump device according to claim 1, wherein an output of a drive source of the pump body is controlled by VVVF.
JP2003059425A 2003-03-06 2003-03-06 Pump device Pending JP2004270474A (en)

Priority Applications (1)

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013079648A (en) * 2008-01-10 2013-05-02 Ebara Corp Pump facility
JP2015062606A (en) * 2013-09-26 2015-04-09 日立アプライアンス株式会社 Drum type washing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013079648A (en) * 2008-01-10 2013-05-02 Ebara Corp Pump facility
JP2015062606A (en) * 2013-09-26 2015-04-09 日立アプライアンス株式会社 Drum type washing machine

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