DE3703647A1 - CENTRIFUGAL PUMP FOR POLLUTED LIQUIDS - Google Patents

CENTRIFUGAL PUMP FOR POLLUTED LIQUIDS

Info

Publication number
DE3703647A1
DE3703647A1 DE19873703647 DE3703647A DE3703647A1 DE 3703647 A1 DE3703647 A1 DE 3703647A1 DE 19873703647 DE19873703647 DE 19873703647 DE 3703647 A DE3703647 A DE 3703647A DE 3703647 A1 DE3703647 A1 DE 3703647A1
Authority
DE
Germany
Prior art keywords
centrifugal pump
openings
cutting
teeth
comminution device
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
DE19873703647
Other languages
German (de)
Other versions
DE3703647C2 (en
Inventor
Peter Rupprecht
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 SE and Co KGaA
Original Assignee
Klein Schanzlin and Becker AG
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.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6320396&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3703647(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Klein Schanzlin and Becker AG filed Critical Klein Schanzlin and Becker AG
Priority to DE19873703647 priority Critical patent/DE3703647A1/en
Priority to EP88101578A priority patent/EP0278388B1/en
Publication of DE3703647A1 publication Critical patent/DE3703647A1/en
Application granted granted Critical
Publication of DE3703647C2 publication Critical patent/DE3703647C2/de
Granted legal-status Critical Current

Links

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
    • 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
    • F04D7/045—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 with means for comminuting, mixing stirring or otherwise treating
    • 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating

Landscapes

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

Description

Gegenstand der Erfindung ist eine Kreiselpumpe gemäß dem Gattungsbegriff des Patentanspruches.The invention relates to a centrifugal pump according to the Generic term of the claim.

Eine derartige Kreiselpumpe ist bekannt durch die CH-PS 4 23 489. Diese Kreiselpumpe besitzt einen vor der Zulauföffnung des Laufrades angeordneten Schneidring, welcher mit einem federnd gegen ihn angepreßten Schneidstück zusammenwirkt. Gemäß der Lehre der zitierten Schrift kann der Schneidring als ebenes, kegeliges oder auch als zylindrisches Teil ausgebildet sein. Bei zylindrischer Gestaltung des Schneidringes kann das Schneidstück an der Innen- oder der Außenseite des Zylinders angeordnet sein. Allen Ausführungen gemeinsam ist die Funktion des Schneidstückes: Vom Sog der Kreiselpumpe gegen die Öffnungen des Schneidringes angelegte Feststoffe werden zu dem Schneid­ stück geführt und dort im günstigen Falle zerkleinert. Ist das Feststoffteil jedoch so fest oder so groß, daß es nicht in einem ersten Schneidvorgang zerkleinert werden kann, wird es dem Schneidstück so oft und so lange zugeführt, bis es auf ein die Öffnungsgröße des Schneidringes unterschreitendes Maß reduziert ist. Um das Schneidstück vor Beschädigungen durch feste Stoffe zu schützen, ist es beweglich aufgehängt. So wird es durch alle Beimengungen, die nicht im ersten Durchgang zerkleinert werden können, aus seiner normalen Position herausgehoben. Dies kann dazu führen, daß größere Lappen den Schneidring überdecken und durch einen im Extremfall zu befürchtenden Verschluß sämtlicher Öffnungen den Zulauf zur Kreiselpumpe verstopfen.Such a centrifugal pump is known from CH-PS 4 23 489. This centrifugal pump has one in front of the inlet opening of the Impeller arranged cutting ring, which with a resilient the cutting piece pressed against him cooperates. According to the The cutting ring can be taught as a flat, be conical or formed as a cylindrical part. With a cylindrical design of the cutting ring, this can Cutting piece on the inside or outside of the cylinder be arranged. The function is common to all versions of the cutting piece: From the suction of the centrifugal pump against the openings solids applied to the cutting ring become the cutting piece led and crushed there in the best case. Is the solid part, however, so firm or so large that it does not can be crushed in a first cutting process feed it to the cutting tool as often and until it is on a dimension below the opening size of the cutting ring is reduced. To prevent the cutting piece from being damaged to protect solid materials, it is flexibly suspended. So it will be due to all admixtures that are not in the first pass can be crushed from its normal position lifted out. This can cause larger lobes cover the cutting ring and in an extreme case  to be feared closure of all openings the inlet plug to the centrifugal pump.

Es sind auch bereits Zerkleinerungseinrichtungen bekannt, die als dem Laufrad der Kreiselpumpe vorgeschaltete Schneid- und Mahlwerke wirken. Die DE-OS 26 12 910 mag hier als Beispiel für eine Vielzahl solcher Einrichtungen dienen. All diesen Einrichtungen gemeinsam ist der Umstand, daß sie den Saugmund des Laufrades einengen. Ihr Betrieb verlangt hohe Drehmomente und damit starke Antriebsmotoren, um das zerkleinerte Gut durch die Einrichtung zu würgen. Im übrigen hat sich in der Praxis erwiesen, daß die als Schneid- und Mahlwerke wirkenden Zerkleinerungseinrichtungen dazu neigen, Zöpfe aus den festen Beimengungen der Förderflüssigkeit zu bilden, was wiederum zu einer Verstopfung des Durchflusses führen kann.Crushing devices are also known as the cutting and upstream of the impeller of the centrifugal pump Grinders work. DE-OS 26 12 910 may be an example here serve for a variety of such facilities. All of these Common facilities is the fact that they have the suction mouth of the impeller. Their operation requires high torques and thus powerful drive motors to the shredded good choking through the facility. For the rest, in the Practice has proven that those acting as cutting and grinding mechanisms Crushers tend to get braids out of the solid Formations of the conveying liquid form, which in turn leads to blockage of the flow.

Der Erfindung liegt die Aufgabe zugrunde, eine Kreiselpumpe mit einer Zerkleinerungseinrichtung zu schaffen, die bei einem geringen Aufwand für die verwendeten Teile und einer vergleichs­ weise kleinen Antriebsleistung eine sichere Schneid- und Förderwirkung für die festen Bestandteile des Fördergutes erreicht.The invention has for its object a centrifugal pump with a shredder to create a little effort for the parts used and a comparative wise small drive power a safe cutting and Promotional effect for the fixed components of the material to be conveyed reached.

Die gestellte Aufgabe wird bei einer dem Gattungsbegriff entsprechenden Kreiselpumpe gelöst durch die im kennzeichnenden Teil des Patentanspruches genannten Merkmale. The task is given in a generic term corresponding centrifugal pump solved by the in the characteristic Features mentioned in the claim.  

Die für den Erfindungsgegenstand zu verwendeten Teile sind einfach herzustellen und können auch in viele bereits bestehende Kreiselpumpen eingebaut werden. Die erfindungsgemäße Zerkleinerungseinrichtung engt den Saugmund nicht ein. Sie vollzieht einen echten Schneidvorgang, das abgeschnittene Gut kann sofort über das Laufrad abtransportiert werden.The parts to be used for the subject of the invention are easy to manufacture and can also be used in many existing ones Centrifugal pumps can be installed. The invention Shredding device does not constrict the suction mouth. they carries out a real cutting process, the cut goods can be removed immediately via the impeller.

Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Die Zeichnung zeigt inThe invention will be explained in more detail using an exemplary embodiment explained. The drawing shows in

Fig. 1 eine Schnittdarstellung durch eine erfindungsgemäße Kreiselpumpe im Bereich des Laufrades und der Zerkleinerungseinrichtung, und in Fig. 1 is a sectional view through a centrifugal pump according to the invention in the region of the impeller and the shredding device, and in

Fig. 2 eine Seitenansicht der als Einzelheit dargestellten Zerkleinerungseinrichtung. Fig. 2 is a side view of the shredding device shown as a detail.

Das Laufrad (1) in der Kreiselpumpe ist auf einer Welle (2) befestigt. Die Welle (2) trägt außerdem das mit einer Schraube (3) befestigte umlaufende Teil (4) einer Schneideinrichtung. Im umlaufenden Teil (4) sind radiale Öffnungen (5) angeordnet.The impeller ( 1 ) in the centrifugal pump is attached to a shaft ( 2 ). The shaft ( 2 ) also carries the rotating part ( 4 ) of a cutting device fastened with a screw ( 3 ). Radial openings ( 5 ) are arranged in the peripheral part ( 4 ).

Das umlaufende Teil (4) wird umschlossen von einem an der saugseitigen Gehäusewand (6) befestigten Ring (7), der mit mehreren Zähnen (8) versehen ist. Die Zähne (8) befinden sich in dem von den Öffnungen (5) des umlaufenden Teiles (4) bestrichenen Bereich. The peripheral part ( 4 ) is enclosed by a ring ( 7 ) fastened to the suction-side housing wall ( 6 ) and provided with several teeth ( 8 ). The teeth ( 8 ) are located in the area covered by the openings ( 5 ) of the peripheral part ( 4 ).

Bei laufender Kreiselpumpe wird ein in der Förderflüssigkeit befindlicher Gegenstand, beispielsweise ein Lappen, vom Sog des Laufrades (1) angezogen und gelangt somit in den Bereich des durch den Ring (7) und das umlaufende Teil (4) gebildeten Schneideinrichtung. Hier wird der Gegenstand zunächst von dem Ring (7) gehalten und durch die zusammenwirkenden Kanten der Öffnungen (5) und der Zähne (8) in kleine, vom Laufrad (1) förderbare Stücke zerlegt. Dies geschieht dadurch, daß die in die Öffnungen (5) gelangenden Teile des Feststoffes erfaßt und mit ziehendem Schnitt abgetrennt werden.When the centrifugal pump is running, an object in the delivery liquid, for example a rag, is attracted by the suction of the impeller ( 1 ) and thus reaches the area of the cutting device formed by the ring ( 7 ) and the peripheral part ( 4 ). Here the object is first held by the ring ( 7 ) and broken down into small pieces which can be conveyed by the impeller ( 1 ) through the cooperating edges of the openings ( 5 ) and the teeth ( 8 ). This is done in that the parts of the solid entering the openings ( 5 ) are gripped and separated with a pulling cut.

Die Öffnungen (5) können, anders als im Ausführungsbeispiel, auch oval, rauten- oder schlitzförmig sein. Auch die Form der Zähne (8) des Ringes (7) kann anders gestaltet sein als im Ausführungsbeispiel. Als Material für die Schneideinrichtung können Hartguß, Sintermetall oder gehärteter Werkzeugstahl verwendet werden.Unlike in the exemplary embodiment, the openings ( 5 ) can also be oval, diamond-shaped or slit-shaped. The shape of the teeth ( 8 ) of the ring ( 7 ) can also be designed differently than in the exemplary embodiment. Chilled cast iron, sintered metal or hardened tool steel can be used as the material for the cutting device.

Claims (1)

Kreiselpumpe mit einer dem Pumpenlaufrad vorgeschalteten Zerkleinerungseinrichtung für faserige oder stückige Beimengungen in der Förderflüssigkeit, wobei die Zerkleinerungseinrichtung durch ein mit radialen Durch­ trittsöffnungen versehenes umlaufendes Teil und ein damit zusammenwirkendes feststehendes Teil gebildet wird, dadurch gekennzeichnet, daß das feststehende Teil von einem das umlaufende Teil (4) umschließenden Ring (7) gebildet wird, der mit einer Mehrzahl von Zähnen (8) versehen ist, welche sich in dem von den Öffnungen (5) des umlaufenden Teiles (4) bestrichenen Bereich befinden, wobei die Größe der Öffnungen (5) und der freien Räume zwischen den Zähnen (8) so bemessen ist, daß der freie Querschnitt der Zerkleinerungseinrichtung in allen Stellungen des umlaufenden Teiles (4) mindestens dem geforderten Einlaufquerschnitt der Kreiselpumpe entspricht.Centrifugal pump with a comminution device upstream of the pump impeller for fibrous or lumpy admixtures in the conveying liquid, the comminution device being formed by a circumferential part provided with radial through openings and a stationary part interacting therewith, characterized in that the stationary part is formed by a circumferential part ( 4 ) enclosing ring ( 7 ) is formed, which is provided with a plurality of teeth ( 8 ) which are located in the area covered by the openings ( 5 ) of the peripheral part ( 4 ), the size of the openings ( 5 ) and the free spaces between the teeth ( 8 ) are dimensioned such that the free cross section of the comminution device in all positions of the rotating part ( 4 ) corresponds at least to the required inlet cross section of the centrifugal pump.
DE19873703647 1987-02-06 1987-02-06 CENTRIFUGAL PUMP FOR POLLUTED LIQUIDS Granted DE3703647A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873703647 DE3703647A1 (en) 1987-02-06 1987-02-06 CENTRIFUGAL PUMP FOR POLLUTED LIQUIDS
EP88101578A EP0278388B1 (en) 1987-02-06 1988-02-04 Centrifugal pump for contaminated liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873703647 DE3703647A1 (en) 1987-02-06 1987-02-06 CENTRIFUGAL PUMP FOR POLLUTED LIQUIDS

Publications (2)

Publication Number Publication Date
DE3703647A1 true DE3703647A1 (en) 1988-08-18
DE3703647C2 DE3703647C2 (en) 1992-05-27

Family

ID=6320396

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873703647 Granted DE3703647A1 (en) 1987-02-06 1987-02-06 CENTRIFUGAL PUMP FOR POLLUTED LIQUIDS

Country Status (2)

Country Link
EP (1) EP0278388B1 (en)
DE (1) DE3703647A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128281A1 (en) * 1991-08-27 1993-03-04 Abs Pumpen Ag Pump for handling domestic sewage - has disc with cutting blades arranged in front of pump inlet
EP1344944A1 (en) * 2002-03-14 2003-09-17 KSB Aktiengesellschaft Centrifugal pump with crushing device
DE102011018434A1 (en) * 2011-04-16 2012-10-18 Wilo Se Centrifugal pump e.g. sewage pump has cutting head portion that is positively connected with shaft element of pump shaft

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438841C2 (en) * 1994-11-02 1999-05-27 Orpu Gmbh Pump with a cutting device
GB9612201D0 (en) * 1996-06-11 1996-08-14 Sweepax International Limited Rotodynamic pump
DE102008057233A1 (en) 2008-11-10 2010-05-12 Orpu Pumpenfabrik Gmbh Milling device for use in pump to e.g. mill thick matter available in sewage water, has cutting devices formed spatially separate from another cutting device such that rotation symmetric cutting parts enclose stationary cutting part
DE102016225921A1 (en) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Sewage lifting plant with cutting unit
DE102016225920A1 (en) 2016-12-21 2018-06-21 KSB SE & Co. KGaA Centrifugal pump with a crushing arrangement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH423489A (en) * 1962-10-12 1966-10-31 Schade Harald Ing Dr Centrifugal pump for contaminated liquids with crushing device
DE2518179A1 (en) * 1975-04-24 1976-11-04 Bbc Brown Boveri & Cie Solids size-reducing unit for pump intake - has perforated disc with upstream rotary cutter arm at intake end of suction duct
DE2612910A1 (en) * 1976-03-26 1977-09-29 Albert Blum SEWAGE PUMP
US4143990A (en) * 1977-04-29 1979-03-13 Atencio Francisco J G Dam with movable hydroelectric assembly
DE2553823C2 (en) * 1975-11-29 1984-06-14 Albert 5204 Lohmar Blum Sewage pump
DE3340295A1 (en) * 1983-11-08 1985-05-15 Albert 5204 Lohmar Blum Pump for the delivery of liquids intermingled with lumpy contaminants

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1453750A1 (en) * 1964-05-29 1969-03-06 Josef Eisele Cutting unit in the suction line of a manure pump
DE2411043A1 (en) * 1974-03-08 1975-09-18 Abs Pumps Ltd Submerged sewage pump with disintegrator - exerts disintegrating forces in radial direction by radial rounded teeth on discs
GB1568388A (en) * 1975-11-29 1980-05-29 Blum A Pump with comminuating means at the inlet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH423489A (en) * 1962-10-12 1966-10-31 Schade Harald Ing Dr Centrifugal pump for contaminated liquids with crushing device
DE1528853A1 (en) * 1962-10-12 1969-12-04 Schade Geb Feissel Hertha Centrifugal pump for contaminated fluids with crushing device
DE2518179A1 (en) * 1975-04-24 1976-11-04 Bbc Brown Boveri & Cie Solids size-reducing unit for pump intake - has perforated disc with upstream rotary cutter arm at intake end of suction duct
DE2553823C2 (en) * 1975-11-29 1984-06-14 Albert 5204 Lohmar Blum Sewage pump
DE2612910A1 (en) * 1976-03-26 1977-09-29 Albert Blum SEWAGE PUMP
US4143990A (en) * 1977-04-29 1979-03-13 Atencio Francisco J G Dam with movable hydroelectric assembly
DE3340295A1 (en) * 1983-11-08 1985-05-15 Albert 5204 Lohmar Blum Pump for the delivery of liquids intermingled with lumpy contaminants

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128281A1 (en) * 1991-08-27 1993-03-04 Abs Pumpen Ag Pump for handling domestic sewage - has disc with cutting blades arranged in front of pump inlet
EP1344944A1 (en) * 2002-03-14 2003-09-17 KSB Aktiengesellschaft Centrifugal pump with crushing device
DE102011018434A1 (en) * 2011-04-16 2012-10-18 Wilo Se Centrifugal pump e.g. sewage pump has cutting head portion that is positively connected with shaft element of pump shaft
DE102011018434B4 (en) 2011-04-16 2022-05-25 Wilo Se Centrifugal pump with cutter

Also Published As

Publication number Publication date
EP0278388B1 (en) 1991-10-16
DE3703647C2 (en) 1992-05-27
EP0278388A3 (en) 1988-09-14
EP0278388A2 (en) 1988-08-17

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8127 New person/name/address of the applicant

Owner name: KSB AG, 6710 FRANKENTHAL, DE

8110 Request for examination paragraph 44
D2 Grant after examination
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8339 Ceased/non-payment of the annual fee