JP3302529B2 - Rectifier for pump suction tank - Google Patents
Rectifier for pump suction tankInfo
- Publication number
- JP3302529B2 JP3302529B2 JP10546095A JP10546095A JP3302529B2 JP 3302529 B2 JP3302529 B2 JP 3302529B2 JP 10546095 A JP10546095 A JP 10546095A JP 10546095 A JP10546095 A JP 10546095A JP 3302529 B2 JP3302529 B2 JP 3302529B2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- suction pipe
- suction
- rectifying
- water
- 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.)
- Expired - Fee Related
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポンプ吸水槽の整流装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rectifier for a pump suction tank.
【０００２】[0002]
【従来の技術】図６および図７に示した吸水槽１にポン
プＰ，Ｐを設置したポンプ場において、吸水槽１内に渦
流が発生してポンプＰ，Ｐの吸込管に吸込まれると、吸
込管内で旋回流が生じ、その結果、揚水量不足または揚
水量過剰となり、原動機の過負荷現象を起こしてポンプ
の性能が変動したり、振動や騒音を生じたり、ポンプ
Ｐ，Ｐの吸込管から空気が吸込まれて性能低下を来すな
ど、様々な弊害が起こる。2. Description of the Related Art In a pump station in which pumps P, P are installed in a water absorption tank 1 shown in FIGS. 6 and 7, when a vortex is generated in the water absorption tank 1 and sucked into suction pipes of the pumps P, P. A swirl flow is generated in the suction pipe, resulting in insufficient pumping or excessive pumping, causing an overload phenomenon of the prime mover to fluctuate the performance of the pump, generating vibration and noise, and suctioning the pumps P and P. Various adverse effects occur, such as performance degradation due to the inhalation of air from the tube.
【０００３】そこで、従来より、図６に示す吸水槽１で
は、流入水路２の長さＬを大きくして整流することによ
り、吸水槽１内での渦流の発生を防止するように工夫さ
れ、図７に示す吸水槽１では、流入水路２と吸水槽１の
境界部に形成されている絞り部３の長さＬ１を大きく取
って、通水面積の急変を避けることにより、吸水槽１内
での渦流の発生を防止するように工夫されている。Therefore, conventionally, in the water absorption tank 1 shown in FIG. 6, the length L of the inflow water channel 2 is increased and straightened to prevent the occurrence of a vortex in the water absorption tank 1. In the water absorption tank 1 shown in FIG. 7, the length L1 of the narrowed portion 3 formed at the boundary between the inflow water channel 2 and the water absorption tank 1 is made large to avoid a sudden change in the water passing area. It is devised so as to prevent the generation of eddy currents.
【０００４】しかし、図６に示す吸水槽１において、流
入水路２の長さＬを大きくすることおよび図７に示す吸
水槽１において絞り部３の長さＬ１を大きくすること
は、ポンプ場を大型化することになる。したがって、構
築費用が高くなるとともに、スペース上の制約により設
置不能になることも起こり得る。このため、前記流入水
路２および絞り部３を省略した図８に示すような小型の
ポンプ場を構築することによって構築費用の低減および
スペース上の制約の緩和を実現できるが、こうすると、
吸水槽１の内部で渦流が発生し、その発生した渦流がポ
ンプの吸込管に吸込まれて既述のような弊害が起きるこ
とになり、その結果、図８に示すような小型のポンプ場
の構築を妨げているのが現状である。However, increasing the length L of the inflow water channel 2 in the water absorption tank 1 shown in FIG. 6 and increasing the length L1 of the throttle portion 3 in the water absorption tank 1 shown in FIG. It will be larger. Therefore, the construction cost may increase and the installation may not be possible due to space restrictions. Therefore, by constructing a small pumping station as shown in FIG. 8 in which the inflow water channel 2 and the throttle section 3 are omitted, the construction cost can be reduced and the restriction on space can be reduced .
It occurs vortex inside the water tank 1, Ri Do to this <br/> and that generated vortex is sucked into the suction pipe of the pump evils such as described above occurs, so that as shown in FIG. 8 at present, such is preventing the construction of small pumping stations.
【０００５】[0005]
【発明が解決しようとする課題】解決しようとする問題
点は、小型のポンプ場を構築して使用する際に渦流が発
生しても、この渦流がポンプの吸込管に吸込まれるのを
防止することにある。The problem to be solved is that even if a vortex is generated when a small pumping station is constructed and used, this vortex is prevented from being sucked into the suction pipe of the pump. Is to do.
【０００６】[0006]
【課題を解決するための手段】請求項１の発明は、流入
水路からの流水にともない内部に渦流が発生するポンプ
吸水槽内に設置されているポンプの吸込管の吸込口およ
びその付近を前記吸込口よりも上側にのみ開口を有する
整流用筒体で取り囲むことにより、該整流用筒体と吸込
管の外面との間に環状の通路を形成させ、この環状の通
路にポンプ吸水槽内の水を流入させ下向きに流したう
え、吸込口から吸込管内に吸込まれるように構成してい
ることを特徴とし、ポンプ場を小型化しても、ポンプの
吸込管に渦流が吸込まれるのを防止して、前述の様々な
弊害が起こるのを回避する目的を達成した。請求項２の
発明は、前記整流用筒体の内面に、整流用のリブが設け
られていることを特徴とし、渦流がポンプの吸込管に吸
込まれるのをより一層確実に防止できるようにした。According to the first aspect of the present invention, the inflow
Inlet and <br/> rectifying tube having an opening only above the said inlet and near the suction pipe of a pump vortex therein along with running water is installed in the pump water tank generated from waterways by taking the body enclosed Mukoto,該整diversion cylinder body and the suction
An annular passage is formed between the outer surface of the pipe and the annular passage.
The water in the pump suction tank flows into the channel and flows downward
In addition, it is characterized in that it is configured to be sucked into the suction pipe from the suction port , so that even if the pump station is downsized, vortex is prevented from being sucked into the suction pipe of the pump. Thus, the object of avoiding the various adverse effects described above has been achieved. The invention according to claim 2 is characterized in that a rectifying rib is provided on the inner surface of the rectifying cylinder, so that the eddy current can be more reliably prevented from being sucked into the suction pipe of the pump. did.
【０００７】[0007]
【作用】請求項１の発明によれば、ポンプ吸水槽内の水
は、整流用筒体の開口から該整流用筒体の内面と吸込管
の外面とで囲まれる環状の通路に流入して下向きに流
れ、吸込管の吸込口に到達する過程で整流されたのち、
吸込口から吸込管内に吸込まれる。請求項２の発明によ
れば、ポンプ吸水槽内の水は、整流用筒体の開口から該
整流用筒体の内面と吸込管の外面とで囲まれる環状の通
路に流入して下向きに流れ、吸込管の吸込口に到達する
過程で整流用のリブに干渉して強制的に整流されたの
ち、吸込口から吸込管内に吸込まれる。According to the first aspect of the invention, the water in the pump water absorption tank flows from the opening of the rectifying cylinder into the annular passage surrounded by the inner surface of the rectifying cylinder and the outer surface of the suction pipe. After flowing downward and rectifying in the process of reaching the suction port of the suction pipe,
It is sucked into the suction pipe from the suction port. According to the second aspect of the invention, the water in the pump water absorption tank flows downward from the opening of the rectifying cylinder into the annular passage surrounded by the inner surface of the rectifying cylinder and the outer surface of the suction pipe. In the process of arriving at the suction port of the suction pipe, it is forcibly rectified by interfering with the rectifying rib and then sucked into the suction pipe from the suction port.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。図１において、ポンプＰの吸込管１０の吸込口
１０Ａおよびその付近は、吸水槽１１にの底部１１Ａに
設置されている整流用筒体１２によって取り囲まれてい
る。すなわち、整流用筒体１２は、上端を開口１３した
円筒状のもので、その周壁の上端面より少し下側を円周
方向に適当な間隔で切欠することによって、複数の開口
１４．１４……を形成してある。そして、整流用筒体１
２の開口１４．１４……の位置と吸水槽１１の底部１１
Ａの中間に、吸込管１０の吸込口１０Ａの位置を設定し
た状態で整流用筒体１２にポンプＰの吸込管１０が挿入
され、これにより、整流用筒体１２の内面と吸込管１０
の外面によって囲まれる環状の通路１５が形成される。An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a suction port 10 </ b> A of a suction pipe 10 of a pump P and its vicinity are surrounded by a rectifying cylinder 12 installed at a bottom 11 </ b> A of a water absorption tank 11. That is, the rectifying cylinder 12 is a cylindrical one having an opening 13 at the upper end, and a plurality of openings 14.14... ... is formed. And the rectifying cylinder 1
2 and the bottom 11 of the water absorption tank 11
The suction pipe 10 of the pump P is inserted into the rectifying cylinder 12 in a state where the position of the suction port 10A of the suction pipe 10 is set in the middle of A, whereby the inner surface of the rectifying cylinder 12 and the suction pipe 10 are inserted.
An annular passage 15 is formed, which is surrounded by the outer surface of the ring.
【０００９】このような構成であれば、ポンプ吸水槽１
１内の水は、整流用筒体１２の上端開口１３および周壁
に形成された複数の開口１４．１４……から整流用筒体
１２の内面と吸込管１０の外面とで囲まれる環状の通路
１５に流入して下向きに流れ、吸込管１０の吸込口１０
Ａに到達する過程で整流されたのち、吸込口１０Ａから
吸込管１０内に吸込まれることになる。したがって、吸
水槽１０内で渦流が発生し、この渦流が環状の通路１５
に流入しても、吸込管１０の吸込口１０Ａに到達する過
程で整流されることになるので、渦流がポンプＰの吸込
管１０に吸込まれることはない。このため、吸込管１０
内で旋回流が生じなくなるので、ポンプＰの揚水量不足
または揚水量過剰、原動機の過負荷現象によるポンプ性
能の変動、あるいは振動や騒音の発生などの様々な弊害
が起こるのを確実に回避することができる。その結果、
たとえば図８に示すような小型のポンプ場を構築して使
用することが可能になり、構築費用の低減およびスペー
ス上の制約の緩和を実現することができる。つまり、ポ
ンプ場を小型化しても、ポンプの吸込管１０に渦流が吸
込まれるのを防止して、前述の様々な弊害が起こるのを
確実に回避できる。With such a configuration, the pump water absorption tank 1
The water in 1 is formed into an annular passage surrounded by the inner surface of the rectifying cylinder 12 and the outer surface of the suction pipe 10 from the upper end opening 13 of the rectifying cylinder 12 and a plurality of openings 14.14 formed in the peripheral wall. 15 flows downward, and flows into the suction port 10 of the suction pipe 10.
After being rectified in the process of reaching A, it is sucked into the suction pipe 10 from the suction port 10A. Therefore, a vortex is generated in the water absorption tank 10, and the vortex flows in the annular passage 15.
Does not flow into the suction pipe 10 of the pump P because the flow is rectified in the process of reaching the suction port 10A of the suction pipe 10. For this reason, the suction pipe 10
Since no swirling flow is generated inside the pump, various adverse effects such as insufficient pumping amount or excessive pumping amount of the pump P, fluctuations in pump performance due to an overload phenomenon of the prime mover, and generation of vibration and noise are surely avoided. be able to. as a result,
For example, it is possible to construct and use a small pumping station as shown in FIG. 8, and it is possible to reduce the construction cost and ease the constraints on space. That is, even if the pumping station is downsized, the vortex is prevented from being sucked into the suction pipe 10 of the pump, and the various adverse effects described above can be reliably avoided.
【００１０】図２および図３は、整流用筒体１２の他の
実施例を示し、整流用筒体１２の周壁内面に円周方向に
適当な間隔で上下方向にのびる複数の整流用のリブ１
６，１６……が半径方向の内側に突出して設けられてい
る。FIG. 2 and FIG. 3 show another embodiment of the rectifying cylinder 12, in which a plurality of rectifying ribs extending on the inner surface of the peripheral wall of the rectifying cylinder 12 at appropriate intervals in the circumferential direction. 1
Are protruded inward in the radial direction.
【００１１】このような構成の整流用筒体１２を使用す
れば、ポンプ吸水槽１１内の水は、整流用筒体１２の上
端開口１３および周壁に形成された複数の開口１４．１
４から整流用筒体１２の内面と吸込管１０の外面とで囲
まれる環状の通路１５に流入して下向きに流れ、吸込管
１０の吸込口１０Ａに到達する過程で整流用のリブ１
６，１６……に干渉して強制的に整流されたのち、吸込
口１０Ａから吸込管１０内に吸込まれることになる。し
たがって、吸水槽１１内で渦流が発生し、この渦流が環
状の通路１５に流入しても、吸込管１０の吸込口１０Ａ
に到達する過程でより一層効果的に整流されることにな
るので、渦流がポンプＰの吸込管１０に吸込まれること
はない。When the rectifying cylinder 12 having such a configuration is used, the water in the pump water absorption tank 11 is supplied to the upper end opening 13 of the rectifying cylinder 12 and a plurality of openings 14.1 formed in the peripheral wall.
4, flows into an annular passage 15 surrounded by the inner surface of the rectifying cylinder 12 and the outer surface of the suction pipe 10, flows downward, and reaches the suction port 10 </ b> A of the suction pipe 10.
After being forcibly rectified by interfering with 6, 16,..., It is sucked into the suction pipe 10 from the suction port 10A. Therefore, a vortex is generated in the water absorption tank 11 , and even if the vortex flows into the annular passage 15, the suction port 10A of the suction pipe 10 is provided.
The vortex will not be sucked into the suction pipe 10 of the pump P because the flow will be more effectively rectified in the process of reaching.
【００１２】なお、整流用のリブ１６，１６……は、図
４および図５のように、吸込管１０の吸込口１０Ａに対
向して放射状に設けてもよい。The rectifying ribs 16, 16,... May be radially provided so as to face the suction port 10A of the suction pipe 10, as shown in FIGS.
【００１３】前記実施例では、上端に形成した開口１３
と、周壁に形成した複数の開口１４．１４……を備えて
いる整流用筒体１２について説明しているが、開口１３
と複数の開口１４．１４……のいずれか一方のみを形成
した整流用筒体１２を使用してもよい。In the above embodiment, the opening 13 formed at the upper end
And a plurality of openings 14.14... Formed in the peripheral wall.
And a plurality of openings 14.14... May be used.
【００１４】[0014]
【発明の効果】以上説明したように、請求項１の発明
は、吸水槽内で渦流が発生し、この渦流が整流用筒体の
内面と吸込管の外面によって囲まれる環状の通路環状に
流入しても、吸込管の吸込口に到達する過程で整流され
ることになるので、渦流がポンプの吸込管に吸込まれる
ことはない。このため、吸込管内で旋回流が生じなくな
るので、ポンプの揚水量不足または揚水量過剰、原動機
の過負荷現象によるポンプ性能の変動、あるいは振動や
騒音の発生などの様々な弊害が起こるのを確実に回避す
ることができる。その結果、ポンプ場を小型化しても、
ポンプの吸込管に渦流が吸込まれるのを防止して、前述
の様々な弊害が起こるのを確実に回避できるから、構築
費用の低減およびスペース上の制約の緩和を実現でき
る。請求項２の発明は、環状の通路環状に流入した水を
吸込管の吸込口に到達する過程で整流用のリブに干渉さ
せて強制的に整流して、渦流がポンプの吸込管に吸込ま
れること一層効果的に抑えることができる。As described above, according to the first aspect of the present invention, a vortex is generated in the water absorption tank, and the vortex flows into the annular passage ring surrounded by the inner surface of the rectifying cylinder and the outer surface of the suction pipe. However, since the flow is rectified in the process of reaching the suction port of the suction pipe, the vortex is not sucked into the suction pipe of the pump. As a result, a swirl flow does not occur in the suction pipe, and it is ensured that various adverse effects such as insufficient pumping or overloading of the pump, fluctuations in pump performance due to overload of the prime mover, and generation of vibration and noise occur. Can be avoided. As a result, even if the pump station is downsized,
Since the vortex is prevented from being sucked into the suction pipe of the pump and the above-mentioned various adverse effects can be surely avoided, the construction cost can be reduced and the restriction on the space can be reduced. According to the second aspect of the invention, the water flowing into the annular passage annularly interferes with the rectifying ribs in the process of reaching the suction port of the suction pipe and is forcibly rectified, so that the vortex is sucked into the suction pipe of the pump. Can be suppressed more effectively.
【図１】本発明の一実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.
【図２】整流用筒体の他の実施例を示す縦断面図であ
る。FIG. 2 is a longitudinal sectional view showing another embodiment of a rectifying cylinder.
【図３】図２の平面図である。FIG. 3 is a plan view of FIG. 2;
【図４】整流用筒体のさらに異なる実施例を示す縦断面
図である。FIG. 4 is a longitudinal sectional view showing still another embodiment of the rectifying cylinder.
【図５】図４の平面図である。FIG. 5 is a plan view of FIG. 4;
【図６】ポンプ吸水槽の一例を示す平面図である。FIG. 6 is a plan view showing an example of a pump water absorption tank.
【図７】ポンプ吸水槽の他の例を示す平面図である。FIG. 7 is a plan view showing another example of the pump water absorption tank.
【図８】ポンプ吸水槽のさらに異なる例を示す平面図で
ある。FIG. 8 is a plan view showing still another example of the pump water absorption tank.
１０ ポンプの吸込管 １０Ａ 吸込管の吸込口 １１ ポンプ吸水槽 １２ 整流用筒体 １３ 上端の開口 １４ 周壁の開口 １６ 整流用リブ Ｐ ポンプ DESCRIPTION OF SYMBOLS 10 Pump suction pipe 10A Suction pipe suction port 11 Pump water absorption tank 12 Rectification cylinder 13 Upper end opening 14 Peripheral wall opening 16 Rectification rib P pump
フロントページの続き (56)参考文献 特開 平３−233013（ＪＰ，Ａ) 実開 昭52−147903（ＪＰ，Ｕ) 実開 昭60−65395（ＪＰ，Ｕ) 実開 昭57−63983（ＪＰ，Ｕ) 実開 昭56−217381（ＪＰ，Ｕ) 実開 昭57−36399（ＪＰ，Ｕ) 特公 昭63−38560（ＪＰ，Ｂ２) 特公 昭59−22071（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) F04D 13/00 F04D 29/54 Continuation of front page (56) References JP-A-3-233013 (JP, A) JP-A 52-147903 (JP, U) JP-A 60-65395 (JP, U) JP-A 57-63983 (JP, U) , U) Shokai Sho 56-217381 (JP, U) Shokai Sho 57-36399 (JP, U) JP-B 63-38560 (JP, B2) JP-B Sho 59-22071 (JP, B2) (58) Field surveyed (Int. Cl. 7 , DB name) F04D 13/00 F04D 29/54
Claims (2)
流が発生するポンプ吸水槽内に設置されているポンプの
吸込管の吸込口およびその付近を前記吸込口よりも上側
にのみ開口を有する整流用筒体で取り囲むことにより、
該整流用筒体と吸込管の外面との間に環状の通路を形成
させ、この環状の通路にポンプ吸水槽内の水を流入させ
下向きに流したうえ、吸込口から吸込管内に吸込まれる
ように構成していることを特徴とするポンプ吸水槽の整
流装置。(1) A vortex is formed inside by flowing water from an inflow water channel.
The inlet and surrounds Mukoto takes vicinity in rectifying cylindrical body having an opening only above the said suction port of the suction tube of the pump in which the flow is installed in the pump water tank for generating,
An annular passage is formed between the rectifying cylinder and the outer surface of the suction pipe.
And let the water in the pump suction tank flow into this annular passage.
After flowing downward, it is sucked into the suction pipe from the suction port
A rectifier for a pump water absorption tank characterized by having the following configuration .
が設けられていることを特徴とする請求項１記載のポン
プ吸水槽の整流装置。2. A rectifying device for a pump suction tank according to claim 1, wherein a rectifying rib is provided on an inner surface of the rectifying cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10546095A JP3302529B2 (en) | 1995-04-28 | 1995-04-28 | Rectifier for pump suction tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10546095A JP3302529B2 (en) | 1995-04-28 | 1995-04-28 | Rectifier for pump suction tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08296595A JPH08296595A (en) | 1996-11-12 |
| JP3302529B2 true JP3302529B2 (en) | 2002-07-15 |
Family
ID=14408200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10546095A Expired - Fee Related JP3302529B2 (en) | 1995-04-28 | 1995-04-28 | Rectifier for pump suction tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3302529B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6533543B2 (en) * | 2000-02-02 | 2003-03-18 | Ebara Corporation | Vortex prevention apparatus in pump |
| JP4117699B2 (en) * | 2000-06-23 | 2008-07-16 | 株式会社荏原製作所 | Pump vortex prevention device |
| KR100463543B1 (en) * | 2002-12-10 | 2004-12-29 | 엘지전자 주식회사 | Spiral Fan Assembly |
| JP5221176B2 (en) * | 2008-03-18 | 2013-06-26 | 株式会社荏原製作所 | Fluid flow direction changer |
-
1995
- 1995-04-28 JP JP10546095A patent/JP3302529B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08296595A (en) | 1996-11-12 |
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