EP1300594A1 - Centrifugal slurry pump - Google Patents

Centrifugal slurry pump Download PDF

Info

Publication number
EP1300594A1
EP1300594A1 EP02020035A EP02020035A EP1300594A1 EP 1300594 A1 EP1300594 A1 EP 1300594A1 EP 02020035 A EP02020035 A EP 02020035A EP 02020035 A EP02020035 A EP 02020035A EP 1300594 A1 EP1300594 A1 EP 1300594A1
Authority
EP
European Patent Office
Prior art keywords
cutting plate
pump
pump housing
cutting
centrifugal pump
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
EP02020035A
Other languages
German (de)
French (fr)
Other versions
EP1300594B1 (en
Inventor
Steffen Madsen
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.)
Grundfos AS
Original Assignee
Grundfos AS
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
Application filed by Grundfos AS filed Critical Grundfos AS
Publication of EP1300594A1 publication Critical patent/EP1300594A1/en
Application granted granted Critical
Publication of EP1300594B1 publication Critical patent/EP1300594B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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 a waste water centrifugal pump according to the Preamble of claim 1.
  • Sewer pump of smaller size, mounted in collecting wells are and there incoming wastewater, more or less large Contains solids, pump out, have in their intake Cutting unit on, which consists of a cutting plate, which is stationary on the pump housing is fixed and has a plurality of cutting teeth, and from a rotating cutting body, which is fixed to the pump shaft and a plurality of counter - cutting teeth, with the cutting teeth of the Intersecting insert, has, consists. Because such reapers a relatively large wear and tear, they must be replaced often become. The replacement is cumbersome and time consuming, what about the unfavorable mounting structure of the cutting unit is due to the pump housing. So it is necessary the pump housing partially or completely disassemble the insert and then remove the cutting body.
  • the object of the invention is to improve an introductory quoted centrifugal pump to the effect that the cutting unit quickly and easily replaced and securely fastened can, without disassembly of the pump housing is required, in particular to replace the cutting plate.
  • the waste water pump is a simple and quick replacement allows the cutting unit.
  • a disassembly of any part of the Pump housing is no longer required. It is enough, the cutting plate to be released by rotation and then by simply removing to remove the pump housing. Thereafter, the cutting body after loosening its fixing screw from the pump shaft as well be deducted quickly. The insertion of a new cutting unit done just as quickly and easily in the reverse order.
  • the Speed and simplicity of replacing the cutting unit is thus the lack of a relatively large number of mounting screws attributed, which, as a further advantage, the production cost the sewage centrifugal pump according to the invention are reduced. Furthermore, there is no longer the risk of automatic detachment of Cutting plate, because the torque load of the insert in their Einsetzmosides and thus acts in their Einklemmraum.
  • applied bayonet connection is the cutting plate at its outer periphery with provided a plurality of recesses and the pump housing has accordingly the number of these recesses more, radially to the axis of rotation the pump shaft projecting and the edge of the insert between these recesses engaging behind retaining projections, the edge between the retaining projections and the pump housing can be clamped.
  • a simple embodiment for the Fesklemmen the insert exists in that the edge of the cutting plate between the recesses is provided with several Klemmnocken, with the help of the Cutting plate between the pump housing and the retaining projections is trapped.
  • a sewage pump unit 1 which consists of a Abwassernikelpumpe 2 and an electric motor 3 composed to the drive.
  • the wastewater pump comprises a pump housing 4 with an intake 5, an outlet 6 and several outriggers 7. With the outriggers, the unit 1 is placed on a floor surface, a shelf or the like supported, wherein the support feet have sufficient height to prevent the ingress of waste Allow waste water in the intake 5 of the pump 2.
  • a cutting unit provided, consisting of a cutting plate 8 with preferably two Cutting teeth 9 and a cutting body 10 with preferably two Counter cutting teeth 11 is.
  • the cutting plate 8 is stationary on the outside of the pump housing 4 attached while the cutter body 10 at the front end 12 of the rotating pump shaft 13 is screwed tight.
  • the cutting body 10 is supported in the case shown on the pump impeller 14th 3 (Fig. 3), which in turn is non-rotatable and at an axial stop, e.g. a collar or a paragraph, attached to the pump shaft 13 fixed is.
  • the cutting plate 8 To attach the cutting plate 8 to the pump housing 4 is a Bayonet connection provided the best in Figures 2 and 3 can be seen.
  • the cutting plate 8 has a central Hole 15, through which the cutting body 10 mounted in his State according to the figures 1 and 3 extending therethrough, such that a sufficiently large inlet cross section for the wastewater to be removed remains and the cutting teeth 9 of the cutting plate 8 and the counter-cutting teeth 11 of the cutter body 10 cooperate to solid portions in the wastewater in the usual way to crush.
  • the bayonet connection is formed by a plurality of recesses 16 on the outer Circumference of the cutting plate 8 and by according to the number these recesses equal number of retaining projections 17 on the pump housing 4, wherein the holding projections are radial to the axis of rotation 18 of the pump shaft 13 projecting.
  • the projections 17 form between itself and their facing inner edge region of the pump housing 4 a distance of about the thickness of the outer edge the cutting plate 8 between the recesses 16 corresponds. So can the corresponding edge portions 8a of the cutting plate 8 between behind the recesses 16 of the retaining projections 17 when the insert is rotated after it has been inserted axially becomes.
  • the cutting plate 8 is on its outside, d. H. on the side, which faces the retaining projections 17, with a plurality of clamping cams 19 provided.
  • the clamping cam 19 are formed, for example, comma-shaped (Fig. 2); but they can also be wedge-shaped.
  • the provision the clamping cam 19 ensures that the cutting plate 8 wobble-free and is self-locking clamped to the pump housing 4.
  • the pump housing 4 Preferably is the pump housing 4 with a to the suction area. 5 adjacent, annular Rezess 20 provided which the Randabscnitte 8a of the cutting plate 8 receives.
  • a locking screw 22 is provided be.
  • This locking screw is advantageous in one of the retaining projections 17 screwed in and presses the insert, d. H. their corresponding Peripheral edge portion 8a in the recess, against the Pump housing 4.
  • the cutting plate or the pump housing if the insert has a through hole, a recess (not shown), in which engages the locking screw. Since the pump housing 4 is usually provided with support feet 7 is, it makes sense, the outriggers in such a way that they too at the same time form the retaining projections 17, as shown in Figures 1 and 3 is shown.

Landscapes

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

Abstract

A submersible pump for waste water has a centrifugal pump with support feet to stand on the bottom of a sump, and powered by an electric motor on top of the pump. The water intake is centrally under the pump and is fitted with a rotating cutting disc to shred any solids. The disc is accessible without having to dismantle the pump housing. It can be fitted using a bayonet coupling or is fitted with a thread which self tightens when the pump operates.

Description

Die Erfindung geht aus von einer Abwasserkreiselpumpe gemäß dem Oberbegriff des Patentanspruchs 1.The invention is based on a waste water centrifugal pump according to the Preamble of claim 1.

Abwasserkreiselpumpen kleinerer Baugröße, die in Sammelbrunnen montiert sind und dort einlaufendes Abwasser, das mehr oder weniger große Feststoffanteile enthält, abpumpen, weisen in ihrem Ansaugbereich ein Schneidwerk auf, das aus einer Schneidplatte, die stationär am Pumpengehäuse befestigt ist und mehrere Schneidzähne aufweist, und aus einem rotierenden Schneidkörper, der an der Pumpenwelle befestigt ist und mehrere Gegenschneidzähne, die mit den Schneidzähnen der Schneidplatte zusammenwirken, aufweist, besteht. Weil solche Schneidwerke eine relativ große Abnutzung erfahren, müssen sie oft ausgewechselt werden. Das Auswechseln ist jedoch umständlich und zeitraubend, was auf die ungünstige Montagekonstruktion des Schneidwerkes an dem Pumpengehäuse zurückzuführen ist. So ist es erforderlich, das Pumpengehäuse teilweise oder vollständig zu demontieren, um die Schneidplatte und anschließend den Schneidkörper entfernen zu können. Die gesamte Montage eines neuen Schneidwerkes erfolgt dann mit den gleichen Nachteilen in umgekehrter Reihenfolge. Außerdem besteht bei ungenügend festgeschraubter Schneidplatte die Gefahr, dass die Schrauben aufgrund der hohen Drehmomentbelastung der Schneidplat+e abgeschert werden, so dass sich die Schneidplatte aus ihrer Befestigung löst. Sewer pump of smaller size, mounted in collecting wells are and there incoming wastewater, more or less large Contains solids, pump out, have in their intake Cutting unit on, which consists of a cutting plate, which is stationary on the pump housing is fixed and has a plurality of cutting teeth, and from a rotating cutting body, which is fixed to the pump shaft and a plurality of counter - cutting teeth, with the cutting teeth of the Intersecting insert, has, consists. Because such reapers a relatively large wear and tear, they must be replaced often become. The replacement is cumbersome and time consuming, what about the unfavorable mounting structure of the cutting unit is due to the pump housing. So it is necessary the pump housing partially or completely disassemble the insert and then remove the cutting body. The entire assembly of a new cutting unit then takes place with the same disadvantages in reverse order. It also exists Insufficiently screwed insert the risk that the Screws due to the high torque load of the cutting plate + e be sheared off so that the cutting plate from its attachment solves.

Die Aufgabe der Erfindung besteht in der Verbesserung einer einleitend angeführten Abwasserkreiselpumpe dahingehend, dass das Schneidwerk schnell und einfach ausgewechselt und sicher befestigt werden kann, ohne dass eine Demontage des Pumpengehäuses erforderlich ist, um insbesondere die Schneidplatte auszuwechseln.The object of the invention is to improve an introductory quoted centrifugal pump to the effect that the cutting unit quickly and easily replaced and securely fastened can, without disassembly of the pump housing is required, in particular to replace the cutting plate.

Die Lösung der Aufgabe ist in dem Patentanspruch 1 angeführt.The solution of the problem is given in the patent claim 1.

Aufgrund der erfindungsgemäßen Befestigungskonstruktion der Schneidplatte des Schneidwerkes am zentralen Ansaugbereich des Gehäuses der Abwasserkreiselpumpe ist ein einfaches und schnelles Auswechseln des Schneidwerkes ermöglicht. Eine Demontage irgendeines Teiles des Pumpengehäuses ist nicht mehr erforderlich. Es genügt, die Schneidplatte durch Drehung zu lösen und danach durch einfaches Abnehmen von dem Pumpengehäuse zu entfernen. Danach kann der Schneidkörper nach Lösen seiner Befestigungsschraube von der Pumpenwelle ebenfalls schnell abgezogen werden. Das Einsetzen eines neuen Schneidwerkes erfolgt ebenso schnell und einfach in umgekehrter Reihenfolge. Die Schnelligkeit und Einfachheit des Auswechselns des Schneidwerkes ist somit auf das Fehlen einer relativ großen Anzahl von Befestigungsschrauben zurückzuführen, wodurch, als weiterer Vorteil, auch die Herstellungskosten der erfindungsgemäßen Abwasserkreiselpumpe reduziert sind. Weiterhin besteht nicht mehr die Gefahr des selbsttätigen Ablösens der Schneidplatte, da die Drehmomentbelastung der Schneidplatte in deren Einsetzdrehrichtung und damit in deren Einklemmrichtung wirkt.Due to the mounting structure of the cutting plate according to the invention the cutting unit at the central intake of the housing The waste water pump is a simple and quick replacement allows the cutting unit. A disassembly of any part of the Pump housing is no longer required. It is enough, the cutting plate to be released by rotation and then by simply removing to remove the pump housing. Thereafter, the cutting body after loosening its fixing screw from the pump shaft as well be deducted quickly. The insertion of a new cutting unit done just as quickly and easily in the reverse order. The Speed and simplicity of replacing the cutting unit is thus the lack of a relatively large number of mounting screws attributed, which, as a further advantage, the production cost the sewage centrifugal pump according to the invention are reduced. Furthermore, there is no longer the risk of automatic detachment of Cutting plate, because the torque load of the insert in their Einsetzdrehrichtung and thus acts in their Einklemmrichtung.

In vorteilhafter Ausgestaltung der erfindungsgemäß angewendeten Bajonettverbindung ist die Schneidplatte an ihrem äußeren Umfang mit mehreren Ausnehmungen versehen und das Pumpengehäuse weist entsprechend der Anzahl dieser Ausnehmungen mehrere, radial zur Drehachse der Pumpenwelle vorkragende und den Rand der Schneidplatte zwischen diesen Ausnehmungen hintergreifende Haltevorsprünge auf, wobei der Rand zwischen den Haltevorsprüngen und dem Pumpengehäuse einklemmbar ist.In an advantageous embodiment of the present invention applied bayonet connection is the cutting plate at its outer periphery with provided a plurality of recesses and the pump housing has accordingly the number of these recesses more, radially to the axis of rotation the pump shaft projecting and the edge of the insert between these recesses engaging behind retaining projections, the edge between the retaining projections and the pump housing can be clamped.

Da das Pumpengehäuse häufig ansaugseitig mit mehreren Abstützfüßen ausgebildet ist, sind diese Abstützfüße in weiterer Fortbildung der Erfindung so ausgestaltet, dass sie die vorgenannten Haltevorsprünge mitbilden.Since the pump housing often suction side with multiple support feet is formed, these support feet are in a further development of the invention designed so that they form the aforementioned retaining projections.

Eine einfache Ausgestaltung für das Fesklemmen der Schneidplatte besteht darin, dass der Rand der Schneidplatte zwischen den Ausnehmungen mit mehreren Klemmnocken versehen ist, mit deren Hilfe die Schneidplatte zwischen dem Pumpengehäuse und den Haltevorsprüngen eingeklemmt ist.A simple embodiment for the Fesklemmen the insert exists in that the edge of the cutting plate between the recesses is provided with several Klemmnocken, with the help of the Cutting plate between the pump housing and the retaining projections is trapped.

Weitere Vorteile und Merkmale der Erfindung sind den entsprechenden Unteransprüchen zu entnehmen.Further advantages and features of the invention are the corresponding ones Subclaims refer.

Die Erfindung ist nachstehend anhand eines in den anliegenden Zeichnungen dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
eine perspektivische Ansicht auf das Ausführungsbeispiel, gesehen auf die Unterseite der Abwasserkreiselpumpe,
Fig. 2
eine perspektivische und auseinander gezogene Darstellung auf das Schneidwerk der Abwasserkreiselpumpe,
Fig. 3
einen Axialschnitt durch die Abwasserkreiselpumpe nach Fig. 1.
The invention is explained below with reference to an embodiment illustrated in the accompanying drawings. Show it:
Fig. 1
a perspective view of the embodiment, as seen on the underside of the wastewater pump,
Fig. 2
a perspective and exploded view of the cutting unit of the wastewater pump,
Fig. 3
an axial section through the septic tank pump according to FIG. 1.

In Fig. 1 ist ein Abwasserpumpenaggregat 1 gezeigt, das sich aus einer Abwasserkreiselpumpe 2 und einem Elektromotor 3 zu deren Antrieb zusammensetzt. Die Abwasserkreiselpumpe umfasst ein Pumpengehäuse 4 mit einem Ansaugbereich 5, einem Auslassstutzen 6 und mehreren Abstützfüßen 7. Mit den Abstützfüßen wird das Aggregat 1 auf einer Bodenfläche, einer Abstellfläche oder dergleichen abgestützt, wobei die Abstützfüße eine ausreichende Höhe aufweisen, um den Eintritt von abzuförderndem Abwasser in den Ansaugbereich 5 der Pumpe 2 zu erlauben.In Fig. 1, a sewage pump unit 1 is shown, which consists of a Abwasserkreiselpumpe 2 and an electric motor 3 composed to the drive. The wastewater pump comprises a pump housing 4 with an intake 5, an outlet 6 and several outriggers 7. With the outriggers, the unit 1 is placed on a floor surface, a shelf or the like supported, wherein the support feet have sufficient height to prevent the ingress of waste Allow waste water in the intake 5 of the pump 2.

In dem Ansaugbereich 5 des Pumpengehäuses 4 ist ein Schneidwerk vorgesehen, das aus einer Schneidplatte 8 mit vorzugsweise zwei Schneidzähnen 9 und aus einem Schneidkörper 10 mit vorzugsweise zwei Gegenschneidzähnen 11 besteht. Wie es am besten aus Fig. 3 zu erkennen ist, ist die Schneidplatte 8 stationär auf der Außenseite des Pumpengehäuses 4 befestigt, während der Schneidkörper 10 an dem Stirnende 12 der rotierenden Pumpenwelle 13 fest angeschraubt ist. Der Schneidkörper 10 stützt sich dabei im gezeigten Fall an dem Pumpenlaufrad 14 ab (Fig. 3), das seinerseits drehfest und an einem axialen Anschlag, z.B. ein Bund oder ein Absatz, anliegend an der Pumpenwelle 13 festgelegt ist.In the suction region 5 of the pump housing 4 is a cutting unit provided, consisting of a cutting plate 8 with preferably two Cutting teeth 9 and a cutting body 10 with preferably two Counter cutting teeth 11 is. As best seen in FIG. 3 is, the cutting plate 8 is stationary on the outside of the pump housing 4 attached while the cutter body 10 at the front end 12 of the rotating pump shaft 13 is screwed tight. The cutting body 10 is supported in the case shown on the pump impeller 14th 3 (Fig. 3), which in turn is non-rotatable and at an axial stop, e.g. a collar or a paragraph, attached to the pump shaft 13 fixed is.

Zur Befestigung der Schneidplatte 8 an dem Pumpengehäuse 4 ist eine Bajonettverbindung vorgesehen, die am besten in den Figuren 2 und 3 zu erkennen ist. Gemäß Fig. 2 weist die Schneidplatte 8 ein zentrales Loch 15 auf, durch welches sich der Schneidkörper 10 in seinem montierten Zustand gemäß den Figuren 1 und 3 hindurch erstreckt, derart, dass ein ausreichend großer Eintrittsquerschnitt für das abzufördernde Abwasser übrigbleibt und die Schneidzähne 9 der Schneidplatte 8 und die Gegenschneidzähne 11 des Schneidkörpers 10 zusammenwirken, um Feststoffanteile in dem Abwasser in üblicher Weise zu zerkleinern. To attach the cutting plate 8 to the pump housing 4 is a Bayonet connection provided the best in Figures 2 and 3 can be seen. According to Fig. 2, the cutting plate 8 has a central Hole 15, through which the cutting body 10 mounted in his State according to the figures 1 and 3 extending therethrough, such that a sufficiently large inlet cross section for the wastewater to be removed remains and the cutting teeth 9 of the cutting plate 8 and the counter-cutting teeth 11 of the cutter body 10 cooperate to solid portions in the wastewater in the usual way to crush.

Die Bajonettverbindung ist durch mehrere Ausnehmungen 16 am äußeren Umfang der Schneidplatte 8 und durch entsprechend der Anzahl dieser Ausnehmungen gleich viele Haltevorsprünge 17 an dem Pumpengehäuse 4 gebildet, wobei die Haltevorsprünge radial zur Drehachse 18 der Pumpenwelle 13 vorkragen. Die Vorsprünge 17 bilden zwischen sich und dem ihnen zugekehrten inneren Randbereich des Pumpengehäuses 4 einen Abstand aus, der etwa der Dicke des äußeren Randes der Schneidplatte 8 zwischen den Ausnehmungen 16 entspricht. So können die entsprechenden Randabschnitte 8a der Schneidplatte 8 zwischen den Ausnehmungen 16 von den Haltevorsprüngen 17 hintergriffen werden, wenn die Schneidplatte nach ihrem axialen Einsetzen verdreht wird.The bayonet connection is formed by a plurality of recesses 16 on the outer Circumference of the cutting plate 8 and by according to the number these recesses equal number of retaining projections 17 on the pump housing 4, wherein the holding projections are radial to the axis of rotation 18 of the pump shaft 13 projecting. The projections 17 form between itself and their facing inner edge region of the pump housing 4 a distance of about the thickness of the outer edge the cutting plate 8 between the recesses 16 corresponds. So can the corresponding edge portions 8a of the cutting plate 8 between behind the recesses 16 of the retaining projections 17 when the insert is rotated after it has been inserted axially becomes.

Die Schneidplatte 8 ist auf ihrer Außenseite, d. h. auf derjenigen Seite, die den Haltevorsprüngen 17 zugekehrt ist, mit mehreren Klemmnocken 19 versehen. Es sind im gezeigten Beispiel entsprechend der Anzahl der Haltevorsprünge drei Klemmnocken 19 vorgesehen, die sich auf den Randabschnitten 8a zwischen den Ausnehmungen 16 der Schneidplatte 8 befinden. Die Klemmnocken 19 sind beispielsweise kommaförmig ausgebildet (Fig. 2); sie können aber auch keilförmig geformt sein. Das Vorsehen der Klemmnocken 19 sichert, dass die Schneidplatte 8 wackelfrei und selbstsichernd an dem Pumpengehäuse 4 eingeklemmt wird. Vorzugsweise ist das Pumpengehäuse 4 mit einem an den Ansaugbereich 5 angrenzenden, ringförmigen Rezess 20 versehen, welcher die Randabscnitte 8a der Schneidplatte 8 aufnimmt.The cutting plate 8 is on its outside, d. H. on the side, which faces the retaining projections 17, with a plurality of clamping cams 19 provided. There are in the example shown according to the number of Holding projections provided three clamping cam 19, which is located on the Edge portions 8a between the recesses 16 of the cutting plate 8 are located. The clamping cam 19 are formed, for example, comma-shaped (Fig. 2); but they can also be wedge-shaped. The provision the clamping cam 19 ensures that the cutting plate 8 wobble-free and is self-locking clamped to the pump housing 4. Preferably is the pump housing 4 with a to the suction area. 5 adjacent, annular Rezess 20 provided which the Randabscnitte 8a of the cutting plate 8 receives.

Um die Schneidplatte 8 in dem Rezess 20 sicher montieren und davon demontieren zu können, ist sie mit Montagelöchern 21 versehen, die in den Randabschnitten 8a vorgesehen sind und in welche ein entsprechendes Werkzeug eingreift, um die Schneidplatte 8 durch Verdrehen montieren und demontieren zu können. To securely mount the insert 8 in the recess 20 and therefrom To dismantle, it is provided with mounting holes 21, which in the edge portions 8a are provided and in which a corresponding Tool engages to the insert 8 by turning assemble and disassemble.

Zur Drehsicherung der Arbeitsstellung der Schneidplatte 8 in dem Rezeß 20 des Pumpengehäuses 4 kann eine Sicherungsschraube 22 vorgesehen sein. Diese Sicherungsschraube ist vorteilhaft in einem der Haltevorsprünge 17 eingeschraubt und drückt die Schneidplatte, d. h. ihren entsprechenden Umfangsrandabschnitt 8a in dem Rezess, gegen das Pumpengehäuse 4. Hierbei kann die Schneidplatte oder das Pumpengehäuse, wenn die Schneidplatte ein Durchgangsloch hat, eine Vertiefung (nicht gezeigt) aufweisen, in welche die Sicherungsschraube eingreift. Da das Pumpengehäuse 4 in der Regel mit Abstützfüßen 7 versehen ist, bietet es sich an, die Abstützfüße so auszubilden, dass sie auch gleichzeitig die Haltevorsprünge 17 bilden, wie es in den Figuren 1 und 3 gezeigt ist.To prevent rotation of the working position of the cutting plate 8 in the recess 20 of the pump housing 4, a locking screw 22 is provided be. This locking screw is advantageous in one of the retaining projections 17 screwed in and presses the insert, d. H. their corresponding Peripheral edge portion 8a in the recess, against the Pump housing 4. Here, the cutting plate or the pump housing, if the insert has a through hole, a recess (not shown), in which engages the locking screw. Since the pump housing 4 is usually provided with support feet 7 is, it makes sense, the outriggers in such a way that they too at the same time form the retaining projections 17, as shown in Figures 1 and 3 is shown.

Claims (9)

Abwasserkreiselpumpe, bestehend aus einem mit mehreren Abstützfüßen versehenen Pumpengehäuse, einer Pumpenwelle, einem in dem Pumpengehäuse auf der Pumpenwelle drehfest angeordneten Pumpenlaufrad und einem im Saugbereich des Pumpengehäuses vorgesehenen Schneidwerk für Feststoffanteile des Abwassers, wobei das Schneidwerk eine am Pumpengehäuse stationär befestigte Schneidplatte und einen rotierenden, an der Pumpenwelle befestigten, mit der Schneidplatte zusammenwirkenden Schneidkörper aufweist, dadurch gekennzeichnet, dass die Schneidplatte (8) auf der Außenseite des Pumpengehäuses (4) mittels einer Bajonettverbindung (16, 17) befestigt ist.A centrifugal pump, comprising a pump housing provided with a plurality of support feet, a pump shaft, a pump impeller rotatably mounted in the pump housing and a wastewater solid matter cutting unit in the suction area of the pump housing, the cutting unit having a cutting plate fixed stationary to the pump housing and a rotating, having attached to the pump shaft, cooperating with the cutting plate cutting body, characterized in that the cutting plate (8) on the outside of the pump housing (4) by means of a bayonet connection (16, 17) is attached. Abwasserkreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Schneidplatte (8) an ihrem äußeren Umfang mit mehreren Ausnehmungen (16) versehen ist, dass das Pumpengehäuse (4) entsprechend der Anzahl dieser Ausnehmungen mehrere, radial zur Drehachse (18) der Pumpenwelle (13) vorkragende, die so gebildeten Randabschnitte (8a) der Schneidplatte (8) zwischen deren Ausnehmungen (16) hintergreifende Haltevorsprünge (17) aufweist und dass die Randabschnitte zwischen dem Pumpengehäuse und den Haltevorsprüngen einklemmbar sind.Waste water centrifugal pump according to claim 1, characterized in that the cutting plate (8) is provided on its outer circumference with a plurality of recesses (16) that the pump housing (4) according to the number of these recesses a plurality, radially to the axis of rotation (18) of the pump shaft (13 ) projecting, thus formed edge portions (8a) of the cutting plate (8) between the recesses (16) engaging behind holding projections (17) and that the edge portions between the pump housing and the retaining projections are clamped. Abwasserkreiselpumpe nach Anspruch 2, dadurch gekennzeichnet, dass die Randabschnitte (8a) der Schneidplatte (8) je mit einer Klemmnocke (19) versehen sind und die Klemmnocken die Schneidplatte (8) zwischen dem Pumpengehäuse (4) und den Haltevorsprüngen (17) einklemmen.Waste water centrifugal pump according to claim 2, characterized in that the edge portions (8a) of the cutting plate (8) are each provided with a clamping cam (19) and the clamping cams clamp the cutting plate (8) between the pump housing (4) and the holding projections (17). Abwasserkreiselpumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Klemmnocken (19) auf den Randabschnitten (8a) der Schneidplatte (8) komma- oder keilförmig ausgebildet sind. Sewer centrifugal pump according to claim 3, characterized in that the clamping cams (19) on the edge portions (8a) of the cutting plate (8) are comma or wedge-shaped. Abwasserkreiselpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Schneidplatte (8) mittels einer Sicherungsschraube (22) drehgesichert ist.Waste water centrifugal pump according to one of claims 1 to 4, characterized in that the cutting plate (8) by means of a locking screw (22) is secured against rotation. Abwasserkreiselpumpe nach Anspruch 5, dadurch gekennzeichnet, dass die Sicherungsschraube (22) in einem der Haltevorsprünge (17) angeordnet ist.Waste water centrifugal pump according to claim 5, characterized in that the securing screw (22) is arranged in one of the retaining projections (17). Abwasserkreiselpumpe nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass die Sicherungsschraube (22) in eine Vertiefung der Schneidplatte (8) oder unter Durchdringung der Schneidplatte in eine Vertiefung des Pumpengehäuses (4) eingreift.Wastewater centrifugal pump according to claim 5 or 6, characterized in that the locking screw (22) engages in a recess of the cutting plate (8) or while penetrating the cutting plate in a recess of the pump housing (4). Abwasserkreiselpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Haltevorsprünge (17) an den am Pumpengehäuse (4) vorgesehenen Abstützfüßen (7) ausgebildet sind.Sewer centrifugal pump according to one of claims 1 to 7, characterized in that the retaining projections (17) are formed on the pump housing (4) provided Abstützfüßen (7). Abwasserkreiselpumpe nach einem der Ansprüche 1 bis 8, dadurchgekennzeichnet, dass jeder Randabschnitt (8 a) der Schneidplatte (8) mit einem Montageloch (21) versehen ist.Waste water centrifugal pump according to one of claims 1 to 8, characterized that each edge portion (8 a) of Cutting plate (8) with a mounting hole (21) is provided.
EP20020020035 2001-09-10 2002-09-06 Centrifugal slurry pump Expired - Lifetime EP1300594B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20114891U DE20114891U1 (en) 2001-09-10 2001-09-10 Sewage centrifugal pump
DE20114891U 2001-09-10

Publications (2)

Publication Number Publication Date
EP1300594A1 true EP1300594A1 (en) 2003-04-09
EP1300594B1 EP1300594B1 (en) 2009-10-21

Family

ID=7961507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020020035 Expired - Lifetime EP1300594B1 (en) 2001-09-10 2002-09-06 Centrifugal slurry pump

Country Status (2)

Country Link
EP (1) EP1300594B1 (en)
DE (2) DE20114891U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005052378A1 (en) * 2003-11-14 2005-06-09 Weir Minerals Europe Limited Pump insert and assembly
CN103382939A (en) * 2012-05-04 2013-11-06 格兰富控股联合股份公司 Waste water pump
RU2534193C2 (en) * 2009-12-30 2014-11-27 Грундфос Менеджмент А/С Downhole pump

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2513588A (en) * 2013-04-30 2014-11-05 Redrock Machinery Ltd Improvements in and relating to slurry pumps
DE202013009716U1 (en) * 2013-11-29 2014-07-30 Wilo Se Engine cutting pump
DE102014003096A1 (en) 2014-03-11 2015-09-17 Homa Pumpenfabrik Gmbh Lifting plant for wastewater
DE102016225920A1 (en) * 2016-12-21 2018-06-21 KSB SE & Co. KGaA Centrifugal pump with a crushing arrangement
CN110541830B (en) * 2019-08-28 2020-11-24 中国计量大学 Self-suction sewage pump with double-opening ring seal

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143993A (en) * 1976-03-26 1979-03-13 Albert Blum Suction pump with rotatable flow retaining and repelling element
US4402648A (en) * 1981-08-31 1983-09-06 A. O. Smith Harvestore Products, Inc. Chopper pump
DE3640813A1 (en) * 1986-05-16 1987-11-26 Emu Unterwasserpumpen Gmbh Submerged centrifugal pump
EP0395604A1 (en) * 1989-04-27 1990-10-31 ITT Flygt Aktiebolag Centrifugal pump
US5516261A (en) * 1993-11-15 1996-05-14 Wilo Gmbh Unchokable centrifugal pump
DE19543916A1 (en) * 1994-11-28 1996-05-30 Haeny & Cie Ag Centrifugal pump for waste water contg. solids
DE19834815A1 (en) * 1998-08-01 2000-02-10 Orpu Gmbh Pump with cutting device for conveying medium mixed with solid constituents has rotatively driven running wheel provided with cutter forming gap to static counter cutter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650481A (en) 1971-04-01 1972-03-21 Hydr O Matic Pump Co Grinder pump
US4108386A (en) 1977-04-13 1978-08-22 Mcneil Corporation Grinder pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143993A (en) * 1976-03-26 1979-03-13 Albert Blum Suction pump with rotatable flow retaining and repelling element
US4402648A (en) * 1981-08-31 1983-09-06 A. O. Smith Harvestore Products, Inc. Chopper pump
DE3640813A1 (en) * 1986-05-16 1987-11-26 Emu Unterwasserpumpen Gmbh Submerged centrifugal pump
EP0395604A1 (en) * 1989-04-27 1990-10-31 ITT Flygt Aktiebolag Centrifugal pump
US5516261A (en) * 1993-11-15 1996-05-14 Wilo Gmbh Unchokable centrifugal pump
DE19543916A1 (en) * 1994-11-28 1996-05-30 Haeny & Cie Ag Centrifugal pump for waste water contg. solids
DE19834815A1 (en) * 1998-08-01 2000-02-10 Orpu Gmbh Pump with cutting device for conveying medium mixed with solid constituents has rotatively driven running wheel provided with cutter forming gap to static counter cutter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005052378A1 (en) * 2003-11-14 2005-06-09 Weir Minerals Europe Limited Pump insert and assembly
EA008561B1 (en) * 2003-11-14 2007-06-29 Виэр Минералз Юроп Лимитед Pump insert and method of assembling
CN100432448C (en) * 2003-11-14 2008-11-12 韦尔矿产欧洲有限公司 Pump insert and assembly
AU2004293638B2 (en) * 2003-11-14 2010-05-06 Weir Minerals Europe Limited Pump insert and assembly
US8210808B2 (en) 2003-11-14 2012-07-03 Weir Minerals Europe Limited Pump insert and assembly
RU2534193C2 (en) * 2009-12-30 2014-11-27 Грундфос Менеджмент А/С Downhole pump
CN103382939A (en) * 2012-05-04 2013-11-06 格兰富控股联合股份公司 Waste water pump
CN103382939B (en) * 2012-05-04 2016-06-22 格兰富控股联合股份公司 Sewage pump

Also Published As

Publication number Publication date
DE20114891U1 (en) 2001-11-15
DE50213938D1 (en) 2009-12-03
EP1300594B1 (en) 2009-10-21

Similar Documents

Publication Publication Date Title
EP1564410B1 (en) Vertical centrifugal pump module
EP2188532B1 (en) Pump rotor and pump comprising a pump rotor of said type
DE69901673T2 (en) fastener
DE102005036818B4 (en) Pump housing, pump and water-conducting household appliance
EP3181908A1 (en) Multi-stage centrifugal pump having tension anchors made of sheet metal
EP1300594B1 (en) Centrifugal slurry pump
DE3346148A1 (en) DEVICE FOR DETACHABLE FASTENING, PREFERABLY A GRINDING WHEEL ON A POWER-DRIVEN HAND TOOL
DE2707842B2 (en) Rasp tool for a peeling and rasp device for removing tire treads
EP3234371A1 (en) Centrifugal pump impeller
EP3552693A1 (en) Circular screen feeder and wear sheet for the scraper arm of a circular screen feeder
EP1296062B1 (en) Centrifugal pump
EP1233215A2 (en) Ready to fit mechanical seal for the shaft of a pump
DE10315685B4 (en) Clamping connection for a pump shaft mounted on a motor shaft
DE102007056748B4 (en) Brake disc / hub connection
DE602004000548T2 (en) Drive lantern in block pumps and protective cover for this lantern
EP0568722B1 (en) Fan rotor with axial discharge
DE102004029557B4 (en) Vertical centrifugal pump unit
DE102018007790A1 (en) Discontinuous centrifuge
EP1002959B1 (en) Centrifugal pump assembly
DE102012106188B4 (en) Method of dismantling and method of assembling a cutting tool of a tool assembly for making wall slots
DE8201247U1 (en) BLADE FOR LARGE FANS, BLOWERS AND THE LIKE
EP1396312B1 (en) Impeller wheel for a blasting device
DE202022106883U1 (en) Cutting system with stator ring and cutting rotor, stator ring for such a cutting system and stator cutting plate for such a cutting system or such stator ring
EP1767087B1 (en) Knife blade fastening arrangement for a mixing screw in a fodder mixing wagon
DE60024391T2 (en) Self-cleaning household pump

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20030711

AKX Designation fees paid

Designated state(s): DE FR GB IT NL

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50213938

Country of ref document: DE

Date of ref document: 20091203

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20100722

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20210930

Year of fee payment: 20

Ref country code: NL

Payment date: 20210921

Year of fee payment: 20

Ref country code: FR

Payment date: 20210927

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20210923

Year of fee payment: 20

Ref country code: DE

Payment date: 20210923

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 50213938

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: MK

Effective date: 20220905

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20220905

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20220905