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EP3670920A1 - Cutting mechanism for a submersible waste water pump - Google Patents

Cutting mechanism for a submersible waste water pump Download PDF

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Publication number
EP3670920A1
EP3670920A1 EP19000562.9A EP19000562A EP3670920A1 EP 3670920 A1 EP3670920 A1 EP 3670920A1 EP 19000562 A EP19000562 A EP 19000562A EP 3670920 A1 EP3670920 A1 EP 3670920A1
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EP
European Patent Office
Prior art keywords
cutting
suction
volume
suction channel
passage openings
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
EP19000562.9A
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German (de)
French (fr)
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EP3670920B1 (en
Inventor
Dennis Haustein
Hans-Jörg Herold
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.)
Zehnder Pumpen GmbH
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Zehnder Pumpen GmbH
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Publication date
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Publication of EP3670920A1 publication Critical patent/EP3670920A1/en
Application granted granted Critical
Publication of EP3670920B1 publication Critical patent/EP3670920B1/en
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    • 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

Definitions

  • the invention is based on the cutting mechanism for a waste water pump defined in the preamble of claim 1, the thick matter and fiber components of the waste water being discharged and further conveyed via pump-internal suction channels in a pump-related functional component to undergo the same and small-scale comminution, so that turbulence and blockages be avoided.
  • the cutting and shredding of the thick matter and fiber parts is carried out with an application-specific cutter.
  • the cutting unit is connected upstream of the submersible sewage pump and consists of a cutting rotor and a cutting plate.
  • the cutting rotor is equipped with a cutting knife arrangement which is actuated flat and rotating by a cutting rotor drive shaft with the rotary movement of the pump drive.
  • the cutting plate is designed as a cover plate for a suction flange and as a carrier plate for the cutting knives directed counter to the cutting knives on the cutting rotor, which are arranged on one side and in a wedge-like manner in obliquely slotted oblong cutting and passage openings.
  • These cutting and passage openings are designed in a radial and star-like arrangement with respect to one another as suction and entry points for the fluid medium into a suction flange and into the pump housing.
  • the suction flange is fixed between the cutting unit and the pump housing by means of fastening elements in such a way that the fluid medium sucked in from the suction side via an entire suction channel in the direction of fluid flow meets the cutting and passage openings on the cutting plate and is divided into at least six parallel suction channel bores , is conveyed separately as partial volume quantities in these.
  • the cross-sectional and volume volume of all suction channel bores in the suction flange is smaller than the cross-sectional and volume volume of a total suction channel on the suction side of the pump housing.
  • the cutter 1 consisting of the cutting rotor 2 and the cutting plate 5 attached to the suction flange 9 are shown.
  • the cutting rotor 2 is equipped with the cutting knives 3 which are actuated flat and circumferentially by the cutting rotor drive shaft 4 with the rotary movement of the pump drive 15.
  • the cutting rotor 2 has, for example, a star-like design, with three prongs being both the adjusting elements for the positioning and the holding elements for the adjustment and readjustment of the three cutting knives 3 which are moved flat along the cutting plate surface with a cutting gap.
  • the cutting plate 5 is also the cover plate for the suction flange 9 and the carrier plate for the cutting knives 7 directed counter to the cutting knives 3 on the cutting rotor 2, which are arranged on one side and in a wedge-like manner in the obliquely shaped, oblong-shaped cutting and passage openings 6.
  • These eight cutting and passage openings 6 are designed in a radial and star-like arrangement with respect to one another as the suction and entry points for the fluid medium in the fluid flow directions 17 into the suction flange 9 and into the pump housing 13 and lead away. This is done through the eight parallel suction channel bores 10 in the suction flange 9 as separate partial volume quantities.
  • the cross-sectional and volume volume of the eight suction channel bores 10 in the suction flange 9 is dimensioned larger than that of the overall suction channel 16 in Fig. 3 Volume and cross-sectional volume shown on the suction side 14 of the pump housing 13.
  • the pump drive 15 of the submersible sewage pump develops the correspondingly large suction force in the suction channel bores 10.
  • the functionality is also ensured by the fixed connection of the suction flange 9 to the pump housing 13 by the fastening elements 18.

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

Abstract

Bei der Ableitung von mit Dickstoff- und Faseranteilen durchsetzten Abwässern in einem gleichmäßigen Medienstrom, wobei nach einer gleichen und kleinstückigen Zerkleinerung eine Abführung über saugkraftverstärkende Saugkanal-Bohrungen (10) durchführbar ist, sind Verwirbelungen und Verstopfungen vermeidbar.Angeordnet ist ein der Pumpe zugeordnetes Schneidwerk (1), welches aus einem vom Pumpenantrieb (15) betriebenen Schneidrotor (2) mit Schneidmessern (3) und einer Schneidplatte (5) mit entgegen gerichteten Schneidmessern (7) in den langlochförmigen Schneid- und Durchlassöffnungen (6) als gleichzeitige Ansaug- und Eintrittsstellen des Mediumstromes in Saugflansch (9) und Pumpgehäuse (13) besteht.Hauptsächliche Verwendungsmöglichkeit sind kleindimensionierte Abwasser-Tauchpumpen mit guter Saugleistung.When discharging wastewater interspersed with thick matter and fiber in a uniform media flow, whereby after a similar and small-scale shredding can be carried out via suction-strengthening suction channel bores (10), turbulence and blockages can be avoided. 1), which consists of a cutting rotor (2) operated by the pump drive (15) with cutting knives (3) and a cutting plate (5) with opposing cutting knives (7) in the slot-shaped cutting and passage openings (6) as simultaneous suction and entry points of the medium flow in the suction flange (9) and the pump housing (13).

Description

Die Erfindung geht von dem im Oberbegriff des Patentanspruches 1 definierten Schneidwerk für eine Abwasserpumpe aus, wobei die Dickstoff- und Faseranteile der Abwässer vor der Ableitung und weiteren Förderung über pumpeninterne Saugkanäle in einer pumpenzugehörigen Funktionskomponente eine gleiche und kleinstückige Zerkleinerung erfahren, so dass Verwirbelungen und Verstopfungen vermieden werden.The invention is based on the cutting mechanism for a waste water pump defined in the preamble of claim 1, the thick matter and fiber components of the waste water being discharged and further conveyed via pump-internal suction channels in a pump-related functional component to undergo the same and small-scale comminution, so that turbulence and blockages be avoided.

Der Stand der Technik bei der Anordnung und Ausbildung von Zerkleinerungsvorrichtungen für Dickstoff- und Faseranteile in den saugend abzupumpenden Abwässern ist mit den nachstehend benannten Erfindungsanmeldungen beispielhaft für weitere Veröffentlichungen darstellbar.The state of the art in the arrangement and design of size reduction devices for thick matter and fiber components in the wastewater to be pumped by suction can be exemplified for further publications with the invention applications named below.

So ist Inhalt von

  • DE G 692 13 57.6 und von
  • US 3128 051
eine Abwasserpumpe mit einem ringförmigen rotierenden Kanalrad, an dessen Innenwand radial nach innen gerichtete nockenartige und hakenförmige Zerkleinerungselemente angeordnet sind und als Reißzähne wirken, um verfestigte Dickstoffanteile und Langfaser-Bestandteile aus den sich bildenden Stopfen aus- und abzureißen. Diese Art der Zerkleinerung ist aber nur am Außenumfang der sich bildenden Stopfen wirksam.So is the content of
  • DE G 692 13 57.6 and from
  • US 3128 051
a wastewater pump with an annular rotating channel wheel, on the inner wall of which radially inwardly directed cam-like and hook-shaped comminution elements are arranged and act as fangs to tear out and tear off solidified thick matter and long-fiber components from the plugs that form. However, this type of comminution is only effective on the outer circumference of the plugs that form.

Die radial nach außen- und nach innengerichtet angeordneten Zerkleinerungselemente als Schneidzähne an einem Schneidring auszubilden, sind Gegenstand von

  • EP 3027 909 , wobei die Schneidzähne eine Spitzzahnausbildung haben, sowie von
  • DD 283 448 A5 ,
  • DD 230 794 A1 und
  • DE 25 53 823 C3 ,
mit Gerad-Schneidzahnausbildungen an rotierend beweglichen Zerstückelungsscheiben und Schneidringen.The design of the crushing elements arranged radially outward and inward as cutting teeth on a cutting ring are the subject of
  • EP 3027 909 , where the cutting teeth have a pointed tooth formation, as well as from
  • DD 283 448 A5 ,
  • DD 230 794 A1 and
  • DE 25 53 823 C3 ,
with straight cutting tooth designs on rotating movable dismantling disks and cutting rings.

Die Zerkleinerung von Dickstoffanteilen und Langfaser-Bestandteilen aus und an den sich bildenden Stopfen in den Abwässern ist aber auch hier nur an deren Außenumfang und nicht an deren verfestigten Kernteilen wirksam.The comminution of thick matter and long fiber components from and on the plugs that form in the wastewater is also only effective here on its outer circumference and not on its solidified core parts.

Diesen Nachteil versucht die in

  • DD 99973
    beschriebene und als Einrichtung mit Förderwirkung für die Zerkleinerung von Fremdbeimengungen in fließfähigen Stoffen bezeichnete Pumpe für die Gülle- und Abwasserwirtschaft zu überwinden. Zusätzlich zu dem Zerkleinerungswerkzeug mit durch Längsrillen in der Kanalwandung des Durchflussgehäuses unterbrochen ausgebildeten gezahnten Schnittflächen und den verzahnten Innenflächen eines als Schlitzkorb bezeichneten Schneidenträgers sind Wurfschaufeln vorgesehen, um ungewollte Verfestigungen der Dickstoff- und Faseranteile in den Abwässern durch umschaufelnde Stoffbewegungen wenigstens teilweise auszuschließen.
In tries to this disadvantage
  • DD 99973
    described and described as a device with a promotional effect for the comminution of foreign admixtures in flowable materials pump for liquid manure and wastewater management. In addition to the shredding tool with toothed cut surfaces interrupted by longitudinal grooves in the channel wall of the flow-through housing and the toothed inner surfaces of a blade holder referred to as a slot basket, throwing blades are provided in order to at least partially rule out unwanted solidification of the thick matter and fiber components in the waste water by shoveling material movements.

Die Problemstellung ist, gegenüber den benannten Ausbildungen von Schneidwerken für Abwasserpumpen des Standes der Technik, den mit Dickstoff- und Faserstoffanteilen durchsetzten Medienstrom an Abwässern so zu behandeln, dass

  • Verwirbelungen und Verstopfungen vermieden,
  • eine gleiche und kleinstückige Zerkleinerung so durchführbar ist, dass keine ungewollten Verfestigungen und Stopfenbildungen von Teilvolumen eintreten und
  • ein vollständiges Zerkleinern und Zerschneiden mit einem pumpenintegrierten Schneidwerk durchführbar ist.
The problem is to treat the media flow of wastewater permeated with thick matter and fibrous material in relation to the named designs of cutting units for wastewater pumps of the prior art in such a way that
  • Avoid turbulence and blockages
  • the same and small-scale shredding can be carried out in such a way that no unwanted solidifications and plug formation of partial volumes occur and
  • a complete shredding and cutting can be carried out with a pump-integrated cutting unit.

Die benannten Problemstellungen des Standes der Technik bei der Ausbildung von Abwasserpumpen, insbesondere von Abwasserpumpen mit Zerkleinerungs- und Reißelementen für Dickstoff- und Faseranteile in den Abwässern, werden durch die Merkmale des Patentanspruches 1 gelöst.The stated problems of the prior art in the formation of waste water pumps, in particular of waste water pumps with comminution and tearing elements for thick matter and fiber components in the waste water, are solved by the features of patent claim 1.

Die Zerteilung und Zerkleinerung der Dickstoff- und Faseranteile erfolgt mit einem anwendungsspezifisch ausgebildeten Schneidwerk. Das Schneidwerk ist der Abwasser-Tauchpumpe vorgeschaltet und besteht aus einem Schneidrotor und aus einer Schneidplatte. Der Schneidrotor ist mit einer plan und umlaufend von einer Schneidrotor-Antriebswelle mit der Drehbewegung des Pumpenantriebes betätigten Schneidmesser-Anordnung bestückt. Die Schneidplatte ist ausgeführt als eine Abdeckplatte für einen Saugflansch und als eine Trägerplatte für die den Schneidmessern am Schneidrotor entgegen gerichteten Schneidmesser, die einseitig und keilartig in schräggestellten langlochförmigen Schneid- und Durchlassöffnungen angeordnet sind. Diese Schneid- und Durchlassöffnungen sind in einer radialen und sternartigen Anordnung zueinander auch als Ansaug- und Eintrittsstellen für das Fluidmedium in einen Saugflansch und in das Pumpengehäuse hineinführend und ableitend ausgebildet. Der Saugflansch ist zwischen dem Schneidwerk und dem Pumpengehäuse mittels Befestigungselementen so fixiert angeordnet, dass das von der Ansaugseite über einen Gesamt-Saugkanal in Fluidströmungsrichtung angesaugte Fluidmedium auf die an der Schneidplatte vorhandenen Schneid- und Durchlassöffnungen trifft und, in mindestens sechs parallele Saugkanal-Bohrungen aufgeteilt, als Teilvolumen-Mengen getrennt in diesen gefördert wird. Das Querschnitts- und Mengenvolumen aller Saugkanal-Bohrungen im Saugflansch ist dabei kleiner als das Querschnitts- und Mengenvolumen eines Gesamt-Saugkanales an der Ansaugseite des Pumpengehäuses dimensioniert. Dadurch wird die Fließgeschwindigkeit bei gleicher Saugleistung der Pumpe gesteigert was wiederum zur Verbesserung der Schneidqualität führt und ein Zusetzen des Schneidspaltes weitestgehend ausgeschlossen wird.The cutting and shredding of the thick matter and fiber parts is carried out with an application-specific cutter. The cutting unit is connected upstream of the submersible sewage pump and consists of a cutting rotor and a cutting plate. The cutting rotor is equipped with a cutting knife arrangement which is actuated flat and rotating by a cutting rotor drive shaft with the rotary movement of the pump drive. The cutting plate is designed as a cover plate for a suction flange and as a carrier plate for the cutting knives directed counter to the cutting knives on the cutting rotor, which are arranged on one side and in a wedge-like manner in obliquely slotted oblong cutting and passage openings. These cutting and passage openings are designed in a radial and star-like arrangement with respect to one another as suction and entry points for the fluid medium into a suction flange and into the pump housing. The suction flange is fixed between the cutting unit and the pump housing by means of fastening elements in such a way that the fluid medium sucked in from the suction side via an entire suction channel in the direction of fluid flow meets the cutting and passage openings on the cutting plate and is divided into at least six parallel suction channel bores , is conveyed separately as partial volume quantities in these. The cross-sectional and volume volume of all suction channel bores in the suction flange is smaller than the cross-sectional and volume volume of a total suction channel on the suction side of the pump housing. As a result, the flow speed is increased with the same suction power of the pump, which in turn leads to an improvement in the cutting quality and clogging of the cutting gap is largely excluded.

Ergänzende Merkmale sind in den Patentansprüchen 2 und 3 benannt. Sie betreffen die Positionier- und Justierbarkeit der Schneidspalte des Schneidwerkes zwischen den Schneidmesser-Stellungen und die Anordnung von Medium-Ableitnuten.Additional features are named in claims 2 and 3. They relate to the positionability and adjustability of the cutting gap of the cutting mechanism between the cutting knife positions and the arrangement of medium-diverting grooves.

Die Erfindung ist vereinfacht in einem Ausführungsbeispiel in den Figuren dargestellt und im folgenden Beschreibungsteil weitergehend erläutert.The invention is shown in simplified form in an exemplary embodiment in the figures and is further explained in the following description part.

Es zeigen

Fig. 1:
eine gemeinsame Mittenschnitt-Darstellung von Schneidwerk und Saugflansch
Fig. 2:
eine Sicht von der Ansaugseite auf das Schneidwerk
Fig. 3:
eine Vorderansicht einer Abwasser-Tauchpumpe mit Schnittdarstellung der Ansaugseite
Show it
Fig. 1:
a common mid-section representation of the cutting unit and suction flange
Fig. 2:
a view from the intake side of the cutting unit
Fig. 3:
a front view of a sewage submersible pump with a sectional view of the suction side

Als funktionssichernde Komponente für die Zerteilung und Zerkleinerung der Dickstoff- und Faseranteile des mit der Abwasser-Tauchpumpe förderfähig abzupumpenden bzw. abzusaugenden Abwassers sind in den Fig. 1 und 2 das aus dem Schneidrotor 2 und aus der am Saugflansch 9 befestigten Schneidplatte 5 bestehende Schneidwerk 1 dargestellt. Der Schneidrotor 2 ist mit den plan und umlaufend von der Schneidrotor-Antriebswelle 4 mit der Drehbewegung des Pumpenantriebes 15 betätigten Schneidmessern 3 bestückt. Der Schneidrotor 2 hat beispielhaft eine sternartige Ausbildung, wobei drei Zacken sowohl die Stellelemente für die Positionierung wie auch die Halteelemente für die Ein- und Nachstellung der drei plan, entlang der Schneidplatten-Oberfläche mit einem Schneidspalt bewegten Schneidmesser 3 sind. Die lagegenaue Verbindung von Schneidrotor 2, Schneidplatte 3 und Saugflansch 9 insbesondere zur vom Pumpenantrieb bewegten Schneidrotor-Antriebswelle 4 ist mittels austauschbarer Passscheiben-Elemente 11 und ringartiger Gleitlager-Elemente 11, welche mit einem Bund ausgebildet sind, positionier- und justierbar und mittels Befestigungselementen 18 fixierbar. Durch die Bundausbildung an den Gleitlagern 12 erfolgt vorteilhafter Weise die Nachjustierung mittels wiederholbarer Anordnung der austauschbaren Passscheiben-elemente 11. Dadurch wird der feste Sitz der Antriebswelle 4 und demzufolge die sichere definierte Einstellung des Schneidspaltes sicher gestellt. Die Schneidplatte 5 ist auch die Abdeckplatte für den Saugflansch 9 und die Trägerplatte für die den Schneidmessern 3 am Schneidrotor 2 entgegen gerichteten Schneidmesser 7, die einseitig und keilartig in den schräggestellten, langlochförmigen Schneid- und Durchlassöffnungen 6 angeordnet sind. Diese hier acht Schneid- und Durchlassöffnungen 6 sind in einer radialen und sternartigen Anordnung zueinander auch als die Ansaug- und Eintrittsstellen für das Fluidmedium in den Fluidströmungsrichtungen 17 in den Saugflansch 9 und in das Pumpengehäuse 13 hineinführend und ableitend ausgebildet. Dies erfolgt über die acht parallelen Saugkanal-Bohrungen 10 im Saugflansch 9 als getrennte Teilvolumen-Mengen.
Das Querschnitts- und Mengenvolumen der acht Saugkanal-Bohrungen 10 im Saugflansch 9 ist dabei größer dimensioniert als das vom Gesamt-Saugkanal 16 in Fig. 3 an der Ansaugseite 14 des Pumpengehäuses 13 dargestellte Mengen- und Querschnittsvolumen. Der Pumpenantrieb 15 der Abwasser-Tauchpumpe entwickelt dazu die entsprechend groß dimensionierte Saugkraft in den Saugkanal-Bohrungen 10. Die Funktionsfähigkeit ist auch durch die feste Verbindung des Saugflansches 9 mit dem Pumpengehäuse 13 durch die Befestigungselemente 18 gewährleistet.As a function-securing component for the division and comminution of the thick matter and fiber parts of the wastewater that can be pumped or sucked in with the submersible sewage pump, in the Fig. 1 and 2nd the cutter 1 consisting of the cutting rotor 2 and the cutting plate 5 attached to the suction flange 9 are shown. The cutting rotor 2 is equipped with the cutting knives 3 which are actuated flat and circumferentially by the cutting rotor drive shaft 4 with the rotary movement of the pump drive 15. The cutting rotor 2 has, for example, a star-like design, with three prongs being both the adjusting elements for the positioning and the holding elements for the adjustment and readjustment of the three cutting knives 3 which are moved flat along the cutting plate surface with a cutting gap. The precise connection of the cutting rotor 2, cutting plate 3 and suction flange 9, in particular to the cutting rotor drive shaft 4 moved by the pump drive, can be positioned and adjusted by means of interchangeable shim washer elements 11 and ring-like slide bearing elements 11, which are formed with a collar, and by means of fastening elements 18 fixable. Due to the formation of the collar on the slide bearings 12, the readjustment is advantageously carried out by means of a repeatable arrangement of the interchangeable shim washer elements 11. This ensures the firm seating of the drive shaft 4 and, consequently, the securely defined setting of the cutting gap. The cutting plate 5 is also the cover plate for the suction flange 9 and the carrier plate for the cutting knives 7 directed counter to the cutting knives 3 on the cutting rotor 2, which are arranged on one side and in a wedge-like manner in the obliquely shaped, oblong-shaped cutting and passage openings 6. These eight cutting and passage openings 6 are designed in a radial and star-like arrangement with respect to one another as the suction and entry points for the fluid medium in the fluid flow directions 17 into the suction flange 9 and into the pump housing 13 and lead away. This is done through the eight parallel suction channel bores 10 in the suction flange 9 as separate partial volume quantities.
The cross-sectional and volume volume of the eight suction channel bores 10 in the suction flange 9 is dimensioned larger than that of the overall suction channel 16 in Fig. 3 Volume and cross-sectional volume shown on the suction side 14 of the pump housing 13. For this purpose, the pump drive 15 of the submersible sewage pump develops the correspondingly large suction force in the suction channel bores 10. The functionality is also ensured by the fixed connection of the suction flange 9 to the pump housing 13 by the fastening elements 18.

Mit den in Fig. 2 auf der Schneidplatte 5 spiralförmig nach außen gerichtet verlaufenden und den zwischen den Schneid- und Durchlassöffnungen 6 ohne deren Kontaktierung angeordneten Medium-Ableitnuten 8 erfolgt eine entmischte Ableitung des Abwassers von den bereits über die Schneid- und Durchlassöffnungen abgeleiteten Dickstoff- und Faseranteilen. Bezugszeichenliste 1 Schneidwerk 2 Schneidrotor von 1 3 Schneidmesser an 2 4 Schneidrotor-Antriebswelle 5 Schneidplatte von 1 6 Schneid- und Durchlassöffnungen in 5 7 Schneidmesser an 6 8 Medium-Ableitnuten an 5 9 Saugflansch 10 Saugkanal-Bohrungen in 9 11 (austauschbare) Passscheiben-Elemente 12 (ringartige) Gleitlager-Elemente mit Bund 13 Pumpengehäuse 14 Ansaugseite an 13 15 Pumpenantrieb 16 Gesamt-Saugkanal 17 Fluidströmungsrichtung(en) 18 Befestigungselemente für 9, an 13 With the in Fig. 2 on the cutting plate 5 running spirally outward and the medium discharge grooves 8 arranged between the cutting and passage openings 6 without their contacting, there is a segregated discharge of the waste water from the thick matter and fiber portions already discharged via the cutting and passage openings. Reference list 1 Cutting unit 2nd Cutting rotor from 1 3rd Cutting knife on 2nd 4th Cutting rotor drive shaft 5 Insert from 1 6 Cutting and passage openings in 5 7 Cutting knife on 6 8th Medium drainage grooves on 5th 9 Suction flange 10th Suction channel holes in 9 11 (interchangeable) shim elements 12 (Ring-like) plain bearing elements with collar 13 Pump housing 14 Suction side on 13 15 Pump drive 16 Total suction channel 17th Fluid flow direction (s) 18th Fasteners for 9, on 13

Claims (3)

Schneidwerk für eine Abwasser-Tauchpumpe für eine Ableitung von mit Dickstoff- und Faseranteilen durchsetzten Abwässern aus Entstehungs- und Sammelbehältern über einen Gesamt-Saugkanal (16), wobei die Dickstoff- und Faseranteile nach ihrer Zerteilung und Zerkleinerung mittels eines Schneidwerkes (1) in kleinräumige Volumenanteile gemeinsam mit den Abwässern in hebenden Fluidströmungsrichtungen (17), durch Saugkanal-Bohrungen (10) hindurch, vom Pumpenantrieb (15) angesaugt, aus dem Pumpengehäuse (13) ableitbar sind, dadurch gekennzeichnet, dass das Schneidwerk (1) aus • einem Schneidrotor (2), der mit plan und umlaufend von einer Schneidrotor-Antriebswelle (4) mit der Drehbewegung des Pumpenantriebes (15) betätigten Schneidmessern (3) bestückt ist, und aus • einer Schneidplatte (5), die als Abdeckplatte für den Saugflansch (9) und als Trägerplatte für, den Schneidmessern (3) am Schneidrotor (2) entgegen gerichtete Schneidmesser (7), die einseitig und keilartig in schräggestellten langlochförmigen Schneid- und Durchlassöffnungen (6) angeordnet sind, wobei die Schneid- und Durchlassöffnungen (6) in einer radialen und sternartigen Anordnung zueinander auch als Ansaug- und Eintrittsstellen für das Fluidmedium in einem Saugflansch (9) und in das Pumpengehäuse (18) ausgebildet sind, besteht,
dass zwischen dem Schneidwerk (1) und Pumpengehäuse (13) ein Saugflansch (9) mittels Befestigungselementen (18) so fixiert angeordnet ist, dass das von der Ansaugseite (14) über einen Gesamt-Saugkanal (16) in Fluidströmungsrichtung (17) angesaugte Fluidmedium auf die an der Schneidplatte (5) vorhandenen Schneid- und Durchlassöffnungen (6) trifft und, in mindestens sechs parallele Saugkanal-Bohrungen (10) aufgeteilt, als Teilvolumen-Mengen getrennt in diesen gefördert wird und
dass das Querschnitts- und Mengenvolumen aller Saugkanal-Bohrungen (10) im Saugflansch (9) zur Steigerung der Fließgeschwindigkeit und damit zur Verbesserung der Schnittqualität kleiner als das Querschnitts- und Mengenvolumen eines Gesamt-Saugkanales (16) an der Ansaugseite (14) des Pumpengehäuses (13) dimensioniert ist. Cutting unit for a submersible sewage pump for the discharge of wastewater, interspersed with thick matter and fiber parts, from the production and collection containers via a total suction channel (16), the thick matter and fiber parts being broken up and comminuted by means of a cutting unit (1) into small spaces Volume shares together with the waste water in lifting fluid flow directions (17), through suction channel bores (10), sucked in by the pump drive (15), can be derived from the pump housing (13), characterized in that the cutting mechanism (1) is made of • A cutting rotor (2) which is equipped with cutting knives (3) which are actuated flat and rotating by a cutting rotor drive shaft (4) with the rotary movement of the pump drive (15), and out • a cutting plate (5), which acts as a cover plate for the suction flange (9) and as a carrier plate for the cutting knives (3) on the cutting rotor (2) which are directed counter to the cutting knives (7) which are wedge-like in one side and in obliquely oblong slot-shaped cutting and passage openings ( 6) are arranged, the cutting and passage openings (6) in a radial and star-like arrangement to one another also being designed as suction and entry points for the fluid medium in a suction flange (9) and into the pump housing (18),
that a suction flange (9) is arranged in a fixed manner by means of fastening elements (18) between the cutting unit (1) and pump housing (13) in such a way that the fluid medium sucked in from the suction side (14) via a total suction channel (16) in the direction of fluid flow (17) meets the cutting and passage openings (6) on the cutting plate (5) and, divided into at least six parallel suction channel bores (10), is conveyed separately as partial volume quantities in these and
that the cross-sectional and volume volume of all suction channel bores (10) in the suction flange (9) to increase the flow speed and thus to improve the cut quality are smaller than the cross-sectional volume and volume volume of a total suction channel (16) on the suction side (14) of the pump housing (13) is dimensioned. Schneidwerk für eine Abwasser-Tauchpumpe nach Patentanspruch 1, dadurch gekennzeichnet, dass die Schneidspalte zwischen den Schneidmessern (3 und 7) und die Stellungen der Schneid- und Durchlassöffnungen (6) sowie Schneidmesser (7) in einer Schneidplatte (5) und die Stellungen der Saugkanal-Bohrungen (10) im Saugflansch (9) mittels austauschbarer Passscheiben-Elemente (11) und ringartiger mit Bund ausgestatteter Gleitlager-Elemente (12) an der Schneidrotor-Antriebswelle (4) positionier- und justierbar angeordnet sind.Cutting device for a submersible sewage pump according to claim 1, characterized in that the cutting gaps between the cutting blades (3 and 7) and the positions of the cutting and passage openings (6) and cutting blades (7) in a cutting plate (5) and the positions of the Suction channel bores (10) in the suction flange (9) can be positioned and adjusted on the cutting rotor drive shaft (4) by means of interchangeable shim washer elements (11) and ring-like slide bearing elements (12) equipped with a collar. Schneidwerk für eine Abwasser-Tauchpumpe nach Patentanspruch 1 und 2, dadurch gekennzeichnet, dass stirnseitig auf einer Schneidplatte (5) spiralförmig nach außen gerichtet verlaufende Medium-Ableitnuten (8) zwischen den Schneid- und Durchlassöffnungen (6) ohne diese zu kontaktieren, angeordnet sind.Cutting mechanism for a submersible sewage pump according to patent claims 1 and 2, characterized in that medium discharge grooves (8) running spirally outwards on the end face of a cutting plate (5) are arranged between the cutting and passage openings (6) without contacting them .
EP19000562.9A 2018-12-19 2019-12-16 Suction device for a submersible waste water pump Active EP3670920B1 (en)

Applications Claiming Priority (1)

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DE102018009873.8A DE102018009873A1 (en) 2018-12-19 2018-12-19 Cutting unit for a submersible sewage pump

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EP3670920A1 true EP3670920A1 (en) 2020-06-24
EP3670920B1 EP3670920B1 (en) 2022-09-14

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US11471893B2 (en) 2020-07-02 2022-10-18 Crane Pumps & Systems, Inc. Grinder accessory for pump
CN115450925A (en) * 2022-09-23 2022-12-09 台州强威泵业股份有限公司 Overload protection sewage pump
CN116696787A (en) * 2023-07-31 2023-09-05 浙江丰球克瑞泵业有限公司 Submersible cutting pump with sundry cutting function

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US3128051A (en) 1960-11-07 1964-04-07 Dag Mfg Co Pump
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EP3027909A1 (en) 2013-08-01 2016-06-08 Bjm Pumps Llc Shred and shear pump
EP3309401A1 (en) * 2016-10-17 2018-04-18 Xylem IP Management S.à.r.l. A method for providing an axial gap in a cutter assembly of a grinder pump, a shim configured for providing said axial gap and a grinder pump comprising such a shim

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GB584395A (en) * 1942-12-30 1947-01-14 Sulzer Ag Improvements in or relating to pumps for dealing with liquids containing solid substances
US3128051A (en) 1960-11-07 1964-04-07 Dag Mfg Co Pump
DD99973A1 (en) 1972-09-06 1973-09-05
DE2553823C2 (en) 1975-11-29 1984-06-14 Albert 5204 Lohmar Blum Sewage pump
DD230794A1 (en) 1982-05-17 1985-12-11 Tatabanyai Szenbanyak ZERSTUECKELUNGSANLAGE
DD283448A5 (en) 1988-11-04 1990-10-10 "Hidromechanika" Kisszoevetkezet,Hu SHREDDING DEVICE FOR TRUE AND WASTE WATER PUMPS
US5460482A (en) * 1992-05-26 1995-10-24 Vaughan Co., Inc. Centrifugal chopper pump with internal cutter
EP3027909A1 (en) 2013-08-01 2016-06-08 Bjm Pumps Llc Shred and shear pump
EP3309401A1 (en) * 2016-10-17 2018-04-18 Xylem IP Management S.à.r.l. A method for providing an axial gap in a cutter assembly of a grinder pump, a shim configured for providing said axial gap and a grinder pump comprising such a shim

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11471893B2 (en) 2020-07-02 2022-10-18 Crane Pumps & Systems, Inc. Grinder accessory for pump
SE545350C2 (en) * 2020-07-02 2023-07-11 Crane Pumps & Systems Pft Corp Grinder accessory for pump
CN115450925A (en) * 2022-09-23 2022-12-09 台州强威泵业股份有限公司 Overload protection sewage pump
CN116696787A (en) * 2023-07-31 2023-09-05 浙江丰球克瑞泵业有限公司 Submersible cutting pump with sundry cutting function
CN116696787B (en) * 2023-07-31 2023-10-20 浙江丰球克瑞泵业有限公司 Submersible cutting pump with sundry cutting function

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