EP0118403A1 - Einrichtung im Auslass einer Pumpe zur Vermeidung von Rückströmung - Google Patents
Einrichtung im Auslass einer Pumpe zur Vermeidung von Rückströmung Download PDFInfo
- Publication number
- EP0118403A1 EP0118403A1 EP84850036A EP84850036A EP0118403A1 EP 0118403 A1 EP0118403 A1 EP 0118403A1 EP 84850036 A EP84850036 A EP 84850036A EP 84850036 A EP84850036 A EP 84850036A EP 0118403 A1 EP0118403 A1 EP 0118403A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pipe
- outlet pipe
- receiver
- float
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/066—Floating-units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
Definitions
- This invention concerns a check valve for controlling the fluid flow from a pump and specifically a float supported device which controls the pump outlet with reference to the receiver.
- Another method is to provide the outlet pipe with a check valve which prevents the liquid from flowing back.
- a check valve is however very sensitive to strokes and also demands an essentially horizontal outlet pipe having additional tube losses.
- a third possibility is to arrange the outlet pipe bent in such a way, that its upper part always is above the liquid level in the receiver, a so-called siphon.
- Such a device has however considerable losses and in addition-there may be problems at pump start if the liquid level in the receiver goes below the outlet of the siphon.
- FIG. 1 stands for a submersible pump unit having an inlet 2 and an outlet 3.
- 4 stands for the outlet pipe and 5 an outer telescopic pipe axially movable on the first pipe.
- 6 stands for a float and 7 and 8 different liquid levels.
- the submersible pump unit 1 transports the liquid through the pipes 4 and 5.
- the buoyancy of the float 6 is so chosen, that the upper end of the pipe 5 is at a suitable height above the surface 7 to prevent backflow when no pumping takes place. If the liquid level changes (7'), the end of the pipe 5 is auomatically adjusted, as the pipe may be moved along the rigid pipe 4.
- the width of the outlet is maximized as the liquid flows out around the entire periphery of the pipe.
- control forces are balanced and independant of the water depth of the receiver.
- the closing time is almost zero.
- propeller pump a submersible, so-called propeller pump is shown.
- the invention is however possible to use also in connection with other types of pumps within the scope of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Jet Pumps And Other Pumps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8300797 | 1983-02-15 | ||
SE8300797A SE449897B (sv) | 1983-02-15 | 1983-02-15 | Anordning for forhindrande av aterstromning genom utloppsroret till en pump vilket mynnar i en recipient innehallande pumpat medium |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0118403A1 true EP0118403A1 (de) | 1984-09-12 |
EP0118403B1 EP0118403B1 (de) | 1986-07-16 |
Family
ID=20350038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19840850036 Expired EP0118403B1 (de) | 1983-02-15 | 1984-02-02 | Einrichtung im Auslass einer Pumpe zur Vermeidung von Rückströmung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0118403B1 (de) |
JP (1) | JPS59205075A (de) |
DE (1) | DE3460283D1 (de) |
SE (1) | SE449897B (de) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4320422A1 (de) * | 1993-04-08 | 1994-10-13 | Klein Schanzlin & Becker Ag | Rückflußverhinderer für Pumpenauslaufrohre |
EP0623751A1 (de) * | 1993-04-08 | 1994-11-09 | KSB Aktiengesellschaft | Pumpe mit Rückflussverhinderer |
DE10034174A1 (de) * | 2000-07-14 | 2002-01-24 | Ksb Ag | Pumpstation |
EP2090785A2 (de) * | 2008-02-15 | 2009-08-19 | Flux-Geräte GmbH | Pumpeneinrichtung |
CN103821733A (zh) * | 2012-11-15 | 2014-05-28 | Abb公司 | 用于近似确定流体输送系统的静压头的方法 |
CN111675328A (zh) * | 2020-06-01 | 2020-09-18 | 上海市城市建设设计研究总院(集团)有限公司 | 节能型内回流系统及其使用方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1528665A1 (de) * | 1966-07-29 | 1971-01-21 | Ewald Burger | Schmutzwasserpumpe |
US4030859A (en) * | 1975-09-02 | 1977-06-21 | Lake Aid Inc. | Floating aerator having means to vary the length of the draft pipe |
-
1983
- 1983-02-15 SE SE8300797A patent/SE449897B/sv not_active IP Right Cessation
-
1984
- 1984-02-02 EP EP19840850036 patent/EP0118403B1/de not_active Expired
- 1984-02-02 DE DE8484850036T patent/DE3460283D1/de not_active Expired
- 1984-02-14 JP JP59024561A patent/JPS59205075A/ja active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1528665A1 (de) * | 1966-07-29 | 1971-01-21 | Ewald Burger | Schmutzwasserpumpe |
US4030859A (en) * | 1975-09-02 | 1977-06-21 | Lake Aid Inc. | Floating aerator having means to vary the length of the draft pipe |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4320422A1 (de) * | 1993-04-08 | 1994-10-13 | Klein Schanzlin & Becker Ag | Rückflußverhinderer für Pumpenauslaufrohre |
EP0623751A1 (de) * | 1993-04-08 | 1994-11-09 | KSB Aktiengesellschaft | Pumpe mit Rückflussverhinderer |
DE10034174A1 (de) * | 2000-07-14 | 2002-01-24 | Ksb Ag | Pumpstation |
EP2090785A2 (de) * | 2008-02-15 | 2009-08-19 | Flux-Geräte GmbH | Pumpeneinrichtung |
EP2090785A3 (de) * | 2008-02-15 | 2014-01-01 | Flux-Geräte GmbH | Pumpeneinrichtung |
CN103821733A (zh) * | 2012-11-15 | 2014-05-28 | Abb公司 | 用于近似确定流体输送系统的静压头的方法 |
CN103821733B (zh) * | 2012-11-15 | 2016-12-07 | Abb技术有限公司 | 用于近似确定流体输送系统的静压头的方法和设备 |
US9568921B2 (en) | 2012-11-15 | 2017-02-14 | Abb Technology Oy | Method for approximating a static head of a fluid transfer system |
CN111675328A (zh) * | 2020-06-01 | 2020-09-18 | 上海市城市建设设计研究总院(集团)有限公司 | 节能型内回流系统及其使用方法 |
Also Published As
Publication number | Publication date |
---|---|
DE3460283D1 (en) | 1986-08-21 |
JPS59205075A (ja) | 1984-11-20 |
EP0118403B1 (de) | 1986-07-16 |
SE8300797D0 (sv) | 1983-02-15 |
SE449897B (sv) | 1987-05-25 |
JPH0143188B2 (de) | 1989-09-19 |
SE8300797L (sv) | 1984-08-16 |
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