JPS6210478Y2 - - Google Patents
Info
- Publication number
- JPS6210478Y2 JPS6210478Y2 JP1983144943U JP14494383U JPS6210478Y2 JP S6210478 Y2 JPS6210478 Y2 JP S6210478Y2 JP 1983144943 U JP1983144943 U JP 1983144943U JP 14494383 U JP14494383 U JP 14494383U JP S6210478 Y2 JPS6210478 Y2 JP S6210478Y2
- Authority
- JP
- Japan
- Prior art keywords
- suction
- pump
- barrel
- pit
- suction port
- 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
Links
- 239000012530 fluid Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000009977 dual effect Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【考案の詳細な説明】
本考案は、ピツトバレル内に設置した立軸両吸
込ポンプの上下吸込口からの吸込流量を均等にす
るポンプ装置に関するものである。[Detailed Description of the Invention] The present invention relates to a pump device that equalizes the suction flow rate from the upper and lower suction ports of a vertical shaft dual suction pump installed in a pit barrel.
第１図は従来のピツトバレル型立軸両吸込ポン
プ装置の一例を示すもので、図中１は中空円筒状
のピツトバレルで、１ａはその底板、２はピツト
バレル１の上部側壁に接続した流入管、Ｐはピツ
トバレル１内に設けた立軸両吸込ポンプで、３は
その初段のポンプ、４はその上方吸込口、５は下
方吸込口、６は両吸込ポンプの合流管、７は合流
管６と接続した次段のポンプ、８はその揚水管で
ある。 Fig. 1 shows an example of a conventional pit barrel type vertical shaft double suction pump device. In the figure, 1 is a hollow cylindrical pit barrel, 1a is its bottom plate, 2 is an inflow pipe connected to the upper side wall of the pit barrel 1, and P is a vertical shaft double suction pump installed in the pit barrel 1, 3 is its first stage pump, 4 is its upper suction port, 5 is its lower suction port, 6 is a merging pipe of both suction pumps, and 7 is connected to the merging pipe 6. The next pump, 8, is its pumping pipe.
このポンプ装置は、流入管２からピツトバレル
１内に流れ込んだ液体が、ピツトバレル１内を流
下し、初段ポンプ３の吸込口４，５から吸い込ま
れ、さらに合流管６を介して次段ポンプ７に吸い
込まれ昇圧されて、揚液管８を介して吐出される
ものである。 In this pump device, liquid that has flowed into a pit barrel 1 from an inflow pipe 2 flows down inside the pit barrel 1, is sucked in from suction ports 4 and 5 of a first stage pump 3, and is further transferred to a next stage pump 7 via a confluence pipe 6. The liquid is sucked in, pressurized, and discharged through the liquid lift pipe 8.
しかし、この種のポンプ装置においては、流体
がピツトバレル１内を流下した後、上の吸込口４
には流れ方向の転向も少なく滑らかに吸い込まれ
るが、下の吸込口５には、吸込口５とピツトバレ
ル１の底板１ａとの間で流体が180度転向して吸
い込まれるため、この流路形状の差に起因する流
れに対する抵抗が異なる結果、上の吸込口４の吸
込流量と、下の吸込口５の吸込流量との間に差が
生ずる。このように上、下の吸込口４，５からの
吸込流量に差が生ずると、ポンプ本来の性能を十
分に発揮できず、ポンプの正常かつ高効率な運転
が阻害されるという問題が生ずる。 However, in this type of pump device, after the fluid flows down inside the pit barrel 1, the upper suction port 4
The fluid is sucked in smoothly with little turning in the flow direction, but the fluid is sucked into the lower suction port 5 with a 180 degree turn between the suction port 5 and the bottom plate 1a of the pit barrel 1, so this flow path shape As a result of the difference in resistance to flow due to the difference in , a difference occurs between the suction flow rate of the upper suction port 4 and the suction flow rate of the lower suction port 5 . If there is a difference in the suction flow rates from the upper and lower suction ports 4 and 5 as described above, a problem arises in that the original performance of the pump cannot be fully demonstrated and normal and highly efficient operation of the pump is inhibited.
本考案は、上記の問題を解決するためになされ
たもので、立軸両吸込ポンプの上、下の吸込口か
らの吸込流量を等しくして、ピツトバレル内にお
ける立軸両吸込ポンプの性能の劣化を防止して、
正常かつ安全な状態で運転できるポンプ装置を得
ることを目的とするものである。 This invention was made to solve the above problem, and it equalizes the suction flow rate from the upper and lower suction ports of the vertical shaft dual suction pump, thereby preventing the deterioration of the performance of the vertical shaft dual suction pump inside the pit barrel. do,
The objective is to obtain a pump device that can be operated under normal and safe conditions.
すなわち、本考案は側壁上部に流入口を設けた
ピツトバレル内に組み込んだ立軸ポンプの初段が
上方および下方に向けて開口した２個の吸込口を
持つ装置において、上方に開口している吸込口よ
り上位の次段ポンプケーシングの外周壁とバレル
内壁間に案内筒を同心状に配置することにより、
液体が流入口からピツトバレル内に降下し、上、
下の吸込口から吸い込まれる際、上記案内筒によ
り上、下の吸込口からの吸込量を等しくするよう
にしたポンプ装置である。 In other words, the present invention is a device in which the first stage of a vertical shaft pump installed in a pit barrel with an inlet in the upper part of the side wall has two suction ports opening upward and downward. By arranging the guide cylinder concentrically between the outer peripheral wall of the upper next-stage pump casing and the inner wall of the barrel,
The liquid descends from the inlet into the pit barrel, and
In this pump device, when suction is drawn from the lower suction port, the amount of suction from the upper and lower suction ports is equalized by the guide tube.
以下、本考案の一実施例を第２図および第３図
にもとずいて説明する。図中前記符号の同一の符
号は同等のものを示す。 An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In the figures, the same reference numerals as those mentioned above indicate equivalent items.
本考案においては、側壁上部に流入管２を接続
したピツトバレル１内に組み込んだ立軸ポンプＰ
の初段のポンプ３が上方および下方に向けて開口
した２個の吸込口４，５を持つ装置において、上
方に開口している吸込口４より上位の次段ポンプ
７のケーシング外周壁７ａと、バレル１の内壁１
ｂ間に、中空円筒状の案内筒９をポンプＰおよび
ピツトバレル１と同心状に配置する。 In the present invention, a vertical shaft pump P is installed in a pit barrel 1 with an inflow pipe 2 connected to the upper part of the side wall.
In a device in which the first-stage pump 3 has two suction ports 4 and 5 that open upward and downward, the casing outer peripheral wall 7a of the next-stage pump 7 that is higher than the suction port 4 that opens upward; Inner wall 1 of barrel 1
A hollow cylindrical guide tube 9 is arranged concentrically with the pump P and the pit barrel 1 between the pump P and the pit barrel 1.
第２図の１０は、案内筒９を次段のポンプ７の
ケーシングの外周壁７ａに対して固定するため放
射状の複数個配置した連結板であるが、案内筒９
の固定は、この他ピツトバレル１または吸込口４
に対して固定するようにしてもよい。 Reference numeral 10 in FIG. 2 indicates a plurality of connecting plates arranged radially in order to fix the guide tube 9 to the outer circumferential wall 7a of the casing of the next stage pump 7.
In addition to fixing the pit barrel 1 or the suction port 4
It may be fixed to.
また案内筒９は、上記実施例のように円筒状に
形成したものに限らず、例えば第４図の９′のよ
うに、分割した半円筒状のものを組み合わせたも
のでもよく、第５図の９″のように多角形状のも
のでもよい。 Further, the guide tube 9 is not limited to a cylindrical shape as in the above embodiment, but may be a combination of divided semi-cylindrical tubes as shown in 9' in FIG. 4, for example. It may also be polygonal, such as 9''.
また案内筒９の上端部は、ピツトバレル１内を
流下して来た流れを分離するために、２段目のポ
ンプ７のケーシングの大径部の高さ付近に位置す
るのがよく、また、案内筒９の下端部は、この下
端を回り込んで上側の吸込口４に流入する流れを
制限するために、上側の吸込口４とほぼ同じ高さ
に位置させるのが良い。この案内筒９の下端部を
上側の吸込口４の位置より下げすぎると、案内筒
９と上側の吸込口４との間に渦流が発生し、水中
渦にまで成長する場合がある事が実験により確か
められたので、案内筒９の下端部は上側の吸込口
４の高さと同程度にするのが好ましい。 Further, the upper end of the guide tube 9 is preferably located near the height of the large diameter portion of the casing of the second stage pump 7 in order to separate the flow flowing down inside the pit barrel 1. The lower end of the guide tube 9 is preferably positioned at approximately the same height as the upper suction port 4 in order to restrict the flow that flows around this lower end and flows into the upper suction port 4. Experiments have shown that if the lower end of the guide tube 9 is lowered too far below the position of the upper suction port 4, a vortex is generated between the guide tube 9 and the upper suction port 4, which may grow into an underwater vortex. As confirmed by the above, it is preferable that the lower end of the guide tube 9 be approximately the same height as the upper suction port 4.
次に上述のように構成したポンプ装置の作用を
説明する。ピツトバレル１内を満水した状態で、
立軸両吸込ポンプＰを起動することにより、流入
管２からピツトバレル１内に液体が流入して流下
する間に、案内筒９とポンプケーシングの外周壁
７ａ間に流入した流体は、上側の吸込口４から吸
い込まれ、案内筒９とピツトバレル１の内壁面１
ｂの間に流入した流体は下側の吸込口５から吸い
込まれる。そしてこの際、案内筒９によつて上側
の吸込口４から吸い込まれる吸込量が制限される
ため、案内筒９をピツトバレル１の内径とポンプ
７の外径との間の適当な寸法の半径に設定するこ
とにより、上側の吸込口４の吸込量と下側の吸込
口５の吸込量を等しくすることが可能となる。 Next, the operation of the pump device configured as described above will be explained. With pit barrel 1 filled with water,
By starting the vertical shaft dual suction pump P, while the liquid flows from the inflow pipe 2 into the pit barrel 1 and flows down, the fluid that has flowed between the guide tube 9 and the outer circumferential wall 7a of the pump casing is transferred to the upper suction port. 4, the guide tube 9 and the inner wall surface 1 of the pit barrel 1.
The fluid that has flowed in between b is sucked in from the lower suction port 5. At this time, since the amount of suction sucked in from the upper suction port 4 is limited by the guide tube 9, the guide tube 9 is adjusted to a radius of an appropriate size between the inner diameter of the pit barrel 1 and the outer diameter of the pump 7. By setting, it becomes possible to equalize the suction amount of the upper suction port 4 and the suction amount of the lower suction port 5.
この案内筒９の大きさは、ピツトバレル１の内
径、ポンプ７の外径、下側吸込口５とピツトバレ
ル１の底面との距離など、即ちピツトバレル１の
大きさによつて影響を受ける筈であるが、ピツト
バレル１が大きすぎては不経済であり、小さすぎ
ると流入損失が増大するので、ピツトバレル１の
大きさはポンプ７の大きさにより実用上の定形が
推奨される。したがつてポンプ７のケーシングの
外径D7に対して、ピツトバレル１の内径D1はお
よそD1／D7≒1.3〜1.7が望ましい。 The size of this guide tube 9 should be influenced by the inner diameter of the pit barrel 1, the outer diameter of the pump 7, the distance between the lower suction port 5 and the bottom surface of the pit barrel 1, etc., that is, the size of the pit barrel 1. However, if the pit barrel 1 is too large, it will be uneconomical, and if it is too small, the inflow loss will increase. Therefore, it is desirable that the inner diameter D 1 of the pit barrel 1 is approximately D 1 /D 7 ≈1.3 to 1.7 relative to the outer diameter D 7 of the casing of the pump 7.
第６図は案内筒９の径を変化させた時のピツト
バレル１内に流入する全流量に対する上側吸込口
４の吸込量の比の変化を実験的に求めた線図で、
横軸にピツトバレル１とポンプ７のケーシング外
周壁７ａとの間の流路面積A1に対する案内筒９
の内面とケーシング外周壁７ａとの間の流路面積
A2との比を取り、縦軸にはピツトバレル１内を
流下する全流量Q1に対する上側の吸込口４の吸
込量Q4の比を取つて示したもので、曲線イは
D1／D7＝1.31、曲線ロはD1／D7＝1.42、曲線ハは
D1／D7＝1.73の場合をそれぞれプロツトしたもの
である。これより上下の吸込管４，５の吸込流量
を等しく、即ちQ4／Q1＝0.5にするための案内筒
９の径は、ピツトバレル１とポンプケーシング外
周壁７ａとの間の流路面積を二等分する大きさ、
即ちA2／A1＝0.5よりも小さい方が良い事がわか
る。したがつて実用上のピツトバレルの大きさが
D1／D7≒1.3〜1.7の場合において、案内筒９の直
径をその流路面積比A2／A1が0.2〜0.4の範囲内で
適宜選定すれば良いことが知れる。 FIG. 6 is a graph obtained experimentally of the change in the ratio of the suction amount of the upper suction port 4 to the total flow amount flowing into the pit barrel 1 when the diameter of the guide tube 9 is changed.
The horizontal axis shows the guide tube 9 for the flow path area A1 between the pit barrel 1 and the casing outer peripheral wall 7a of the pump 7.
The flow path area between the inner surface of the casing and the casing outer peripheral wall 7a
The vertical axis shows the ratio of the suction amount Q4 of the upper suction port 4 to the total flow rate Q1 flowing down inside the pit barrel 1.Curve A is
D 1 /D 7 = 1.31, curve B is D 1 /D 7 = 1.42, curve C is
These are plots for the case where D 1 /D 7 = 1.73. From this, the diameter of the guide tube 9 in order to make the suction flow rates of the upper and lower suction pipes 4 and 5 equal, that is, Q 4 /Q 1 = 0.5, is determined by the flow path area between the pit barrel 1 and the pump casing outer peripheral wall 7a. The size to divide into two equal parts,
That is, it can be seen that it is better to have A 2 /A 1 = smaller than 0.5. Therefore, the size of the practical pit barrel is
In the case of D 1 /D 7 ≈1.3 to 1.7, it is known that the diameter of the guide tube 9 may be appropriately selected within the range of the flow path area ratio A 2 /A 1 of 0.2 to 0.4.
以上説明したように、本考案によれば、ピツト
バレル内に立軸両吸込ポンプを設置した装置にお
いて、上側吸込口とピツトバレル内壁間に案内筒
を設けることにより上、下の吸込口からの吸込量
を均等にすることができ、その結果、上、下の吸
込口の吸込量の不均等に基づくポンプ性能の劣化
を防止して、正常かつ安全な状態で運転を行うこ
とができるというすぐれた効果が得られる。 As explained above, according to the present invention, in a device in which a vertical suction pump is installed in a pit barrel, the amount of suction from the upper and lower suction ports can be reduced by providing a guide tube between the upper suction port and the inner wall of the pit barrel. As a result, it has the excellent effect of preventing deterioration of pump performance due to uneven suction volume between the upper and lower suction ports, and allowing operation in a normal and safe condition. can get.
第１図は従来のピツトバレル型立軸両吸込ポン
プ装置の要部の断面図、第２図は本考案の一実施
例を示すピツトバレル型立軸両吸込ポンプ装置の
要部の断面図、第３図は第２図のＡ−Ａ線による
断面矢視図、第４図および第５図は案内筒の変形
例を示す斜視図、第６図は本考案に係る案内筒の
設置位置による効果を示す線図である。
１……ピツトバレル、２……流入管、Ｐ……立
軸両吸込ポンプ、３……初段のポンプ、４……上
側吸込口、５……下側吸込口、６……合流管、７
……次段のポンプ、８……揚水管、９……案内
筒、１０……連結板。
Fig. 1 is a sectional view of the main parts of a conventional pit-barrel type vertical shaft double suction pump device, Fig. 2 is a sectional view of the main parts of a pit-barrel type vertical shaft double suction pump device showing an embodiment of the present invention, and Fig. 3 is a sectional view of the main parts of a conventional pit-barrel type vertical shaft double suction pump device. Fig. 2 is a cross-sectional view taken along line A-A in Fig. 2, Figs. 4 and 5 are perspective views showing modified examples of the guide cylinder, and Fig. 6 is a line showing the effect of the installation position of the guide cylinder according to the present invention. It is a diagram. 1... Pit barrel, 2... Inflow pipe, P... Vertical double suction pump, 3... First stage pump, 4... Upper suction port, 5... Lower suction port, 6... Merging pipe, 7
...Next stage pump, 8... Lifting pipe, 9... Guide tube, 10... Connecting plate.
Claims (1)
み込んだ立軸ポンプの初段が上方および下方に向
けて開口した２個の吸込口を持つ装置において、
上方に開口している吸込口より上位の次段ポンプ
ケーシングの外周壁とバレル内壁間に案内筒を同
心状に配置してなるピツトバレル型立軸両吸込ポ
ンプ装置。 In a device in which the first stage of a vertical shaft pump built into a pit barrel with an inlet provided in the upper part of the side wall has two suction ports opening upward and downward,
A pit-barrel vertical double suction pump device in which a guide cylinder is arranged concentrically between the outer circumferential wall of the next-stage pump casing above the suction port that opens upward, and the inner wall of the barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14494383U JPS6054795U (en) | 1983-09-21 | 1983-09-21 | Pit barrel type vertical shaft double suction pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14494383U JPS6054795U (en) | 1983-09-21 | 1983-09-21 | Pit barrel type vertical shaft double suction pump device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6054795U JPS6054795U (en) | 1985-04-17 |
| JPS6210478Y2 true JPS6210478Y2 (en) | 1987-03-11 |
Family
ID=30323078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14494383U Granted JPS6054795U (en) | 1983-09-21 | 1983-09-21 | Pit barrel type vertical shaft double suction pump device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6054795U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001193695A (en) * | 2000-01-12 | 2001-07-17 | Mitsubishi Heavy Ind Ltd | Compressor |
| JP5620208B2 (en) * | 2009-09-28 | 2014-11-05 | 株式会社荏原製作所 | Double suction vertical pump with vortex prevention device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829197B2 (en) * | 1977-01-26 | 1983-06-21 | 株式会社黒木工業所 | Joining method by arc welding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829197U (en) * | 1981-08-20 | 1983-02-25 | 株式会社クボタ | Vertical shaft double suction centrifugal pump |
-
1983
- 1983-09-21 JP JP14494383U patent/JPS6054795U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829197B2 (en) * | 1977-01-26 | 1983-06-21 | 株式会社黒木工業所 | Joining method by arc welding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6054795U (en) | 1985-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6688845B2 (en) | Electric pump for the recirculation of water | |
| US4934914A (en) | Portable motor pump | |
| JP5178635B2 (en) | Groundwater level lowering device | |
| US2969742A (en) | Gas separator for submergible motorpump assemblies | |
| US3429443A (en) | Fluid velocity deceleration device | |
| JPS6210478Y2 (en) | ||
| US2347092A (en) | Circulating and filtering system for swimming pools and the like | |
| US4515608A (en) | Multi-chamber gas anchor | |
| JPH0523909Y2 (en) | ||
| US3336732A (en) | Gas and air separator | |
| US5047146A (en) | Bidirectional flow vacuum filter for a swimming pool having influent and effluent conduits as structural members | |
| CN216689668U (en) | Multistage chambered energy dissipation well | |
| TWM563912U (en) | Two-stage oil-water separator | |
| CN207145718U (en) | Spiral case noise reduction stop valve | |
| CN205534418U (en) | Over -and -under type silence check valve | |
| KR200273237Y1 (en) | Storage tank having pipes inside | |
| CN213331689U (en) | Efficient bidirectional pump device adopting integral falling direction of water pump | |
| JPS6129996Y2 (en) | ||
| CN219909164U (en) | Floating boat type movable water intake pump station | |
| US3353494A (en) | Air and gas separator for descending water | |
| JP3656096B2 (en) | Pre-swirling tank for submersible pumps | |
| JPS6327830Y2 (en) | ||
| SU1418398A2 (en) | Apparatus for producing waves in open water flow | |
| CN106436884A (en) | Waste water collecting container for waste water lifting device | |
| JP2995252B2 (en) | Sewage pump system |