EP0704627A1 - Submersible pump for coarsely polluted liquids - Google Patents

Submersible pump for coarsely polluted liquids Download PDF

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Publication number
EP0704627A1
EP0704627A1 EP95113954A EP95113954A EP0704627A1 EP 0704627 A1 EP0704627 A1 EP 0704627A1 EP 95113954 A EP95113954 A EP 95113954A EP 95113954 A EP95113954 A EP 95113954A EP 0704627 A1 EP0704627 A1 EP 0704627A1
Authority
EP
European Patent Office
Prior art keywords
pump
motor
connection
submersible pump
submersible
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
Application number
EP95113954A
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German (de)
French (fr)
Other versions
EP0704627B1 (en
Inventor
Klaus Dr. Wagner
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.)
KSB AG
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KSB AG
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Filing date
Publication date
Application filed by KSB AG filed Critical KSB AG
Publication of EP0704627A1 publication Critical patent/EP0704627A1/en
Application granted granted Critical
Publication of EP0704627B1 publication Critical patent/EP0704627B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially 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
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially 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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/604—Vortex non-clogging type pumps

Definitions

  • pumps for heavily contaminated liquids are usually equipped with free-flow impellers and tangential pressure ports. Such pumps can only be rinsed for cleaning when they are removed.
  • the higher-seated motor or its cooling jacket is not directly flown by the cleaning water. Deposits in this area, which is important for cooling, are therefore often only incompletely removed by rinsing.
  • Pump housings with vertical pressure ports which have the advantage of being able to flush the casing more easily, are not used due to the risk of clogging with coarsely contaminated liquids.
  • the object of the invention is to provide a submersible pump which, with a low risk of clogging, offers the possibility of intensive flushing of the entire interior without requiring the submersible pump to be removed.
  • a submersible pump for liquids that are interspersed with deposits a tangential pressure connection, a jacket space surrounding the motor, through which the pumped liquid flows, which serves to cool the motor, and a flushing connection, which is arranged at the end of the jacket chamber facing away from the pump and is to be acted upon by an external liquid source.
  • the invention thus combines, as it were, two different types of submersible pumps into a new, third type. In this way, there is even the possibility of creating a standardized housing for dirty water and waste water pumps.
  • a closure cap provided on the flushing connection with a ventilation system. This can be easily cleaned in the event of any clogging after unscrewing the cap.
  • the invention is explained in more detail using an exemplary embodiment.
  • the drawing shows a sectional view of a vertically arranged submersible pump according to the invention.
  • the submersible pump equipped with a free-flow impeller 1 is driven by an electric motor 2.
  • the submersible motor pump has an inlet 3, a pump chamber 4 and a pressure port 5.
  • the electric motor 2 is surrounded by a jacket chamber 6, which is connected to the pump chamber 4 via a plurality of large-area openings (not shown here).
  • the jacket space 6 is filled with liquid that is used to continuously dissipate heat generated in the electric motor 2.
  • a flushing connection 7 is arranged, which is closed by a screwed-on closure cap 8.
  • the closure cap 8 is provided with an opening 9 which serves to vent the interior of the submersible pump.
  • the free-flow impeller 1 draws delivery liquid through the inlet 3 into the pump chamber 4 and delivers it via the pressure nozzle 5 into an area not shown here.
  • the one about that Free-flow impeller 1 pressure exerted on the conveying liquid also leads to the jacket space 6 being filled with conveying liquid.
  • the air present in the jacket space 6 is discharged through the opening 9 in the closure cap 8.
  • Part of the heat generated by the electric motor 2 is given off through the wall of the pump to the surrounding liquid.
  • This conveying liquid is in constant motion due to an internal flow, so that the heat absorbed by it is released to the outside via the wall of the submersible pump housing and into the pump chamber 4 via an exchange flow.
  • the conveying liquid contains impurities, deposits form over time on the walls delimiting the jacket space 6, that is, also on the wall of the electric motor 2, which is important for cooling connected or plugged in, via which pressurized water free of impurities is introduced into the jacket space 6.
  • the rinsing flow conducted through the jacket space 6 releases existing deposits and removes them via the pump space 4 and the inlet 3.
  • the connection of the pressure port 5 with a pressure line - not shown here - does not have to be released for this flushing process; the pump can remain in its installation position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The pump has an inlet (3), a pump space (4) and a tangential pressure connection (5), with the electric motor (2) enclosed by a mantle space (6), through which the pumped medium is circulated for cooling the motor. A rinsing connection (7) is provided at the opposite end of the mantle space to the pump, for connection to an external rinsing fluid source. When the rinsing connection is not in use it is fitted with a closure cap (8) incorporating a venting system (9).

Description

Bei Tauchmotorpumpen für grob verunreinigte Flüssigkeiten erfordert die Aufrechterhaltung der Betriebssicherheit von Zeit zu Zeit eine Reinigung des Pumpeninnenraumes von Ablagerungen. Die Reinigung kann durch eine Spülung erfolgen. Vor allem bei vertikal angeordneten Tauchmotorpumpen, deren oberhalb der Pumpe angeordneter Elektromotor mittels einer auch im ausgetauchten Zustand wirkenden Mantelkühlung durch vorbeiströmendes Fördermedium gekühlt wird, müssen die sich an den der Kühlung dienenden Wandungen ergebenden Ablagerungen regelmäßig entfernt werden. Für transportable, nur zeitweise eingesetzte Pumpen ist ebenfalls eine gründliche Spülung vor deren Einlagerung zu empfehlen.With submersible pumps for coarsely contaminated liquids, maintaining operational safety requires that the interior of the pump is cleaned of deposits from time to time. The cleaning can be done by rinsing. Especially in the case of vertically arranged submersible pumps, the electric motor of which is arranged above the pump and which is cooled by a fluid flowing past by means of jacket cooling, which also acts when immersed, the deposits on the walls serving for cooling have to be removed regularly. For portable pumps that are only used temporarily, thorough flushing is also recommended before storing them.

Aus Gründen der Verstopfungsgefahr sind Pumpen für stark verunreinigte Flüssigkeiten in aller Regel mit Freistromlaufrädern und tangentialen Druckstutzen ausgestattet. Eine Reinigungsspülung solcher Pumpen ist nur im ausgebauten Zustand möglich. Der höher sitzende Motor bzw. dessen Kühlmantel wird dabei nicht direkt vom reinigenden Wasser angeströmt. Ablagerungen in diesem für die Kühlung wichtigen Bereich werden daher oft nur unvollständig durch eine Spülung beseitigt. Pumpengehäuse mit vertikalem Druckstutzen, die den Vorzug der besseren Durchspülbarkeit des Mantelraumes besäßen, kommen wegen Verstopfungsgefahr bei grob verunreinigten Flüssigkeiten nicht zum Einsatz.In order to avoid the risk of clogging, pumps for heavily contaminated liquids are usually equipped with free-flow impellers and tangential pressure ports. Such pumps can only be rinsed for cleaning when they are removed. The higher-seated motor or its cooling jacket is not directly flown by the cleaning water. Deposits in this area, which is important for cooling, are therefore often only incompletely removed by rinsing. Pump housings with vertical pressure ports, which have the advantage of being able to flush the casing more easily, are not used due to the risk of clogging with coarsely contaminated liquids.

Aufgabe der Erfindung ist es, eine Tauchmotorpumpe zu schaffen, die bei geringer Verstopfungsgefahr die Möglichkeit einer intensiven Spülung des gesamten Innenraumes bietet, ohne daß sie den Ausbau der Tauchmotorpumpe notwendig macht.The object of the invention is to provide a submersible pump which, with a low risk of clogging, offers the possibility of intensive flushing of the entire interior without requiring the submersible pump to be removed.

Die gestellten Forderungen werden erfüllt durch eine Tauchmotorpumpe für Förderflüssigkeiten, die mit sich ablagernden Bestandteilen durchsetzt sind, mit einem tangentialen Druckstutzen, einem den Motor umschließenden, von der Förderflüssigkeit durchströmten, der Kühlung des Motors dienenden Mantelraum und einem am pumpenabgewandten Ende des Mantelraumes angeordneten, mit einer externen Flüssigkeitsquelle zu beaufschlagenden Spülanschluß.The requirements are met by a submersible pump for liquids that are interspersed with deposits a tangential pressure connection, a jacket space surrounding the motor, through which the pumped liquid flows, which serves to cool the motor, and a flushing connection, which is arranged at the end of the jacket chamber facing away from the pump and is to be acted upon by an external liquid source.

Die Erfindung verbindet also gewissermaßen zwei verschiedene Arten von Tauchmotorpumpen zu einer neuen, dritten Art. Dabei ergibt sich sogar noch die Möglichkeit, ein standardisiertes Gehäuse für Schmutzwasser- und Abwasserpumpen zu schaffen.The invention thus combines, as it were, two different types of submersible pumps into a new, third type. In this way, there is even the possibility of creating a standardized housing for dirty water and waste water pumps.

Als vorteilhatte Ausgestaltung der Erfindung wird vorgeschlagen, eine am Spülanschluß vorgesehene Verschlußkappe mit einem Entlüftungssystem auszustatten. Dieses läßt sich bei einem etwaigen Verstopfen nach einem Abschrauben der Verschlußkappe in einfacher Weise reinigen.As an advantageous embodiment of the invention, it is proposed to equip a closure cap provided on the flushing connection with a ventilation system. This can be easily cleaned in the event of any clogging after unscrewing the cap.

Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Die Zeichnung zeigt eine Schnittdarstellung einer vertikal angeordneten Tauchmotorpumpe gemäß der Erfindung.The invention is explained in more detail using an exemplary embodiment. The drawing shows a sectional view of a vertically arranged submersible pump according to the invention.

Die mit einem Freistromlaufrad 1 ausgestattete Tauchmotorpumpe wird durch einen Elektromotor 2 angetrieben. Die Tauchmotorpumpe besitzt einen Einlaß 3, einen Pumpenraum 4 und einen Druckstutzen 5. Der Elektromotor 2 ist umgeben von einem Mantelraum 6, der über mehrere - hier nicht erkennbare - großflächige Öffnungen mit dem Pumpenraum 4 verbunden ist. Der Mantelraum 6 ist mit Förderflüssigkeit gefüllt, die der stetigen Abfuhr von im Elektromotor 2 entstehender Wärme dient.The submersible pump equipped with a free-flow impeller 1 is driven by an electric motor 2. The submersible motor pump has an inlet 3, a pump chamber 4 and a pressure port 5. The electric motor 2 is surrounded by a jacket chamber 6, which is connected to the pump chamber 4 via a plurality of large-area openings (not shown here). The jacket space 6 is filled with liquid that is used to continuously dissipate heat generated in the electric motor 2.

Am pumpenabgewandten Ende des Mantelraumes 6 ist ein Spülanschluß 7 angeordnet, der durch eine aufgeschraubte Verschlußkappe 8 verschlossen wird. Die Verschlußkappe 8 ist mit einer der Entlüftung des Innenraumes der Tauchmotorpumpe dienenden Öffnung 9 versehen.At the end of the jacket space 6 facing away from the pump, a flushing connection 7 is arranged, which is closed by a screwed-on closure cap 8. The closure cap 8 is provided with an opening 9 which serves to vent the interior of the submersible pump.

Bei der Inbetriebnahme der Tauchmotorpumpe wird durch das Freistromlaufrad 1 Förderflüssigkeit über den Einlauf 3 in den Pumpenraum 4 gesaugt und über den Druckstutzen 5 in einen hier nicht dargestellten Bereich gefördert. Der über das Freistromlaufrad 1 auf die Förderflüssigkeit ausgeübte Druck führt außerdem dazu, daß der Mantelraum 6 mit Förderflüssigkeit gefüllt wird. Dabei wird die im Mantelraum 6 vorhandene Luft über die Öffnung 9 in der Verschlußkappe 8 abgeführt. Ein Teil der vom Elektromotor 2 erzeugten Wärme wird über dessen Wandung an die ihn umgebende Förderflüssigkeit abgegeben. Diese Förderflüssigkeit befindet sich aufgrund einer inneren Strömung in ständiger Bewegung, so daß die von ihr aufgenommene Wärme über die Wand des Tauchpumpengehäuses nach außen und über eine Austauschströmung in den Pumpenraum 4 abgegeben wird.When the submersible pump is put into operation, the free-flow impeller 1 draws delivery liquid through the inlet 3 into the pump chamber 4 and delivers it via the pressure nozzle 5 into an area not shown here. The one about that Free-flow impeller 1 pressure exerted on the conveying liquid also leads to the jacket space 6 being filled with conveying liquid. The air present in the jacket space 6 is discharged through the opening 9 in the closure cap 8. Part of the heat generated by the electric motor 2 is given off through the wall of the pump to the surrounding liquid. This conveying liquid is in constant motion due to an internal flow, so that the heat absorbed by it is released to the outside via the wall of the submersible pump housing and into the pump chamber 4 via an exchange flow.

Da die Förderflüssigkeit Verunreinigungen enthält, bilden sich mit der Zeit Ablagerungen an den den Mantelraum 6 begrenzenden Wänden, also auch an der für die Kühlung wichtigen Wand des Elektromotors 2. Zur Beseitigung dieser Ablagerungen wird nach einem Abschrauben der Verschlußkappe 8 an den Spülanschluß 7 ein Schlauch angeschlossen oder eingesteckt, über den unter Druck stehendes, von Verunreinigungen freies Wasser in den Mantelraum 6 eingeleitet wird. Die über den Mantelraum 6 geleitete Spülströmung löst vorhandene Ablagerungen und führt diese über den Pumpenraum 4 und den Einlauf 3 ab. Die Verbindung des Druckstutzens 5 mit einer - hier nicht dargestellten - Druckleitung muß für diesen Spülvorgang nicht gelöst werden; die Pumpe kann in ihrer Einbauposition verbleiben.Since the conveying liquid contains impurities, deposits form over time on the walls delimiting the jacket space 6, that is, also on the wall of the electric motor 2, which is important for cooling connected or plugged in, via which pressurized water free of impurities is introduced into the jacket space 6. The rinsing flow conducted through the jacket space 6 releases existing deposits and removes them via the pump space 4 and the inlet 3. The connection of the pressure port 5 with a pressure line - not shown here - does not have to be released for this flushing process; the pump can remain in its installation position.

Claims (2)

Tauchmotorpumpe für Förderflüssigkeiten, die mit sich ablagernden Bestandteilen durchsetzt sind, mit einem tangentialen Druckstutzen (5), einem den Motor (2) umschließenden, von der Förderflüssigkeit durchströmten, der Kühlung des Motors (2) dienenden Mantelraum (6) und einem am pumpenabgewandten Ende des Mantelraumes (6) angeordneten, mit einer externen Flüssigkeitsquelle zu verbindenden Spülanschluß (7).Submersible pump for conveying liquids which are interspersed with deposits, with a tangential pressure nozzle (5), a casing (6) surrounding the motor (2), through which the conveying liquid flows, which serves to cool the motor (2), and an end facing away from the pump of the jacket space (6), which is connected to an external liquid source and is connected to the flushing connection (7). Tauchmotorpumpe nach Anspruch 1, bei welcher der Spülanschluß (7) mit einer lösbar befestigten Verschlußkappe (8) versehen ist, welche mit einem Entlüftungssystem (9) ausgestattet ist.Submersible motor pump according to Claim 1, in which the flushing connection (7) is provided with a detachably fastened closure cap (8) which is equipped with a ventilation system (9).
EP95113954A 1994-09-27 1995-09-06 Submersible pump for coarsely polluted liquids Expired - Lifetime EP0704627B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434461A DE4434461A1 (en) 1994-09-27 1994-09-27 Submersible pump for coarsely contaminated liquids
DE4434461 1994-09-27

Publications (2)

Publication Number Publication Date
EP0704627A1 true EP0704627A1 (en) 1996-04-03
EP0704627B1 EP0704627B1 (en) 1997-11-26

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EP95113954A Expired - Lifetime EP0704627B1 (en) 1994-09-27 1995-09-06 Submersible pump for coarsely polluted liquids

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EP (1) EP0704627B1 (en)
DE (2) DE4434461A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1384895A2 (en) * 2002-07-23 2004-01-28 KSB Aktiengesellschaft Venting system for submersible pump

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1502030B8 (en) 2002-05-07 2009-12-23 Wilo Se Driving motor, especially for a pump
RU2472037C1 (en) * 2011-09-26 2013-01-10 Закрытое Акционерное Общество Научно-Производственное Объединение "Тэн" Submersible slurry pump (versions)
RU2472036C1 (en) * 2011-09-26 2013-01-10 Закрытое Акционерное Общество Научно-Производственное Объединение "Тэн" Submersible slurry pump
US11808268B2 (en) 2020-10-19 2023-11-07 Milwaukee Electric Tool Corporation Stick pump assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1259710A (en) * 1960-06-09 1961-04-28 Scandinavian Agencies Corp Ltd Centrifugal pump driven by electric motor
DE1528862A1 (en) * 1965-04-30 1970-04-23 Stenberg Flygt Ab Sewage pump or the like.
US4134711A (en) * 1976-11-26 1979-01-16 Engineers Sales-Service Co., Inc. Submersible pump apparatus
JPH04347389A (en) * 1991-05-24 1992-12-02 Ishigaki Mech Ind Co Eliminator of entangling impurities in vertical shaft pump
WO1993011360A1 (en) * 1991-12-05 1993-06-10 Nocchi Pompe S.P.A. Centrifugal pump with adaptor for various valves

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1259710A (en) * 1960-06-09 1961-04-28 Scandinavian Agencies Corp Ltd Centrifugal pump driven by electric motor
DE1528862A1 (en) * 1965-04-30 1970-04-23 Stenberg Flygt Ab Sewage pump or the like.
US4134711A (en) * 1976-11-26 1979-01-16 Engineers Sales-Service Co., Inc. Submersible pump apparatus
JPH04347389A (en) * 1991-05-24 1992-12-02 Ishigaki Mech Ind Co Eliminator of entangling impurities in vertical shaft pump
WO1993011360A1 (en) * 1991-12-05 1993-06-10 Nocchi Pompe S.P.A. Centrifugal pump with adaptor for various valves

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 206 (M - 1400) 22 April 1993 (1993-04-22) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1384895A2 (en) * 2002-07-23 2004-01-28 KSB Aktiengesellschaft Venting system for submersible pump
EP1384895A3 (en) * 2002-07-23 2005-11-30 KSB Aktiengesellschaft Venting system for submersible pump

Also Published As

Publication number Publication date
DE4434461A1 (en) 1996-03-28
DE59501033D1 (en) 1998-01-08
EP0704627B1 (en) 1997-11-26

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