EP2639459B1 - Pump device for solid-liquid suspensions - Google Patents
Pump device for solid-liquid suspensions Download PDFInfo
- Publication number
- EP2639459B1 EP2639459B1 EP20120159309 EP12159309A EP2639459B1 EP 2639459 B1 EP2639459 B1 EP 2639459B1 EP 20120159309 EP20120159309 EP 20120159309 EP 12159309 A EP12159309 A EP 12159309A EP 2639459 B1 EP2639459 B1 EP 2639459B1
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- EP
- European Patent Office
- Prior art keywords
- rotor
- acceleration chamber
- conveying device
- wings
- toilet
- 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.)
- Not-in-force
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—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
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
- E03D9/10—Waste-disintegrating apparatus combined with the bowl
Definitions
- the invention relates to a conveying device for liquid-solid suspensions, in particular for waste water from a toilet, with the feature of the preamble of independent claim 1.
- the lower rotor At a distance from the cutting blades lies the lower rotor.
- the rotor blades of the lower rotor ensure a further reduction of the solids in the wastewater and for an acceleration of the wastewater down.
- the wings accelerate the wastewater in the circumferential direction and radially to the common drive shaft.
- a toilet system especially for mobile use in a mobile home, a caravan or a boat, known.
- This toilet installation has a conveyor for wastewater from a toilet.
- the wastewater enters an acceleration chamber whose free cross-section is widened with respect to the inlet.
- the wastewater then impinges in the acceleration chamber on a rotor driven about a vertical rotor axis, which essentially spans the free cross section of the acceleration chamber with its rotor blades.
- the rotor blades adjoin one another in the circumferential direction around the rotor axis. They are designed to accelerate the wastewater down and thereby crush the solids contained in the wastewater.
- the drive of the rotor is designed for a comparatively high speed of 2,500 to 2,800 rpm.
- the bottom of the acceleration chamber located below the rotor is formed helically and terminates in a tangentially outgoing drain for the wastewater.
- the upper edge of the boundary of the sequence represents a disturbing edge on which solids can be deposited, which lead to a blockage of the process and / or to a blocking of the rotor.
- a method and apparatus for pumping fibrous suspensions are disclosed in which larger solids of the suspension are comminuted by two rotors arranged on a common drive.
- the first rotor is arranged in the region of the inlet and extends into the region of a supply container.
- the first rotor has ribs which do not extend over the entire radius of the inlet.
- the region of the inlet, in which the first rotor is arranged has no circular cross-section, but is narrowed, for example, by fixed and radially inwardly projecting ribs.
- the second rotor is arranged in the region of an acceleration chamber, which widens bell-shaped from the inlet.
- the second rotor is formed as an impeller, an acceleration of the suspension in the radial direction and thus in the direction of the flow is achieved.
- the US 5,039,320 A relates to a device for liquefying, degassing and pumping a suspension of fibrous cellulosic material.
- the device has for this purpose two rotors arranged one behind the other, which are arranged in an acceleration chamber.
- the first of the two rotors which extends over a region of the inlet into a reservoir, has wings with a smaller diameter than the wings of the second rotor, thereby freeing up more space for larger solids, which then successively first through the first rotor and then crushed by the second rotor.
- a centrifugal pump in which the wings of a rotor, which is basically arranged in an acceleration chamber, into the Continue the range of an inlet to the acceleration chamber. This is intended to ensure that larger solids do not settle between wings in the region of the acceleration chamber, but are already acted upon by the effect of the wings in the region of the inlet in the direction of the process.
- further vanes may be disposed between the elongate vanes which extend only over the area of the accelerator chamber. All wings end at a distance in front of the wall of the acceleration chamber, so that there is a free space between the wings and the wall of the acceleration chamber. This is to counteract settling of solids between the wings and the wall.
- the invention has for its object to show a delivery device for liquid-solid suspensions, in which the risk of blockages by larger solids construction is significantly reduced.
- Claim 20 is directed to a toilet with a conveying device according to the invention.
- a conveying device for liquid-solid suspensions, in particular for wastewater from a toilet, has an acceleration chamber, a first rotor driven in the acceleration chamber about a rotor axis, which has a plurality of vanes, whose two main directions extend axially and radially to the rotor axis, and a The second rotor rotatably driven about the rotor axis, the rotor having rotor blades aligned radially with respect to the rotor axis.
- An inlet for the wastewater opens axially with respect to the rotor axis in the acceleration chamber.
- the acceleration chamber widens bell-shaped from the inlet of the inlet.
- the first rotor is disposed on the upstream side of the second rotor, wherein the blades of the first rotor have a free distance to an inner wall of the acceleration chamber of at least 33% of the maximum radial extent of the wings.
- the effluent for the wastewater is tangential with respect to the rotor axis of the acceleration chamber.
- the first rotor which faces the mouth of the inlet into the acceleration chamber, has a comparatively large free distance to the next inner wall of the acceleration chamber.
- this free distance to the inner wall of the here bell-shaped widening acceleration chamber remains substantially the same, and one of the wings of the axial inlet facing the first rotor swept volume is correspondingly rounded.
- the rotor rotates about the rotor axis, it causes a centrifugal force on the effluent entering the accelerating chamber, which distributes the effluent and the solids contained therein over the entire cross section of the accelerating chamber.
- a rotational drive direction of the rotors about the rotor axis is reversible. What is important is actually only the reversibility of the rotational drive direction of the second rotor with the rotor blades, because only through this rotational drive direction reversal, the conveying direction of the conveyor device according to the invention in relation to the flow of waste water from the acceleration chamber is reversed.
- the function of the inflow of the wastewater into the acceleration chamber facing first rotor is essentially independent of its direction of rotation.
- the direction of rotation can be triggered manually in the conveyor device according to the invention by pressing an actuator when, for example, the user acoustically that a rotary drive for the rotors does not reach the usual speed or optically determines that the sewage is no longer connected from one to the conveyor Toilet is sucked off.
- the actuation of the actuating element preferably triggers the reverse rotation of the rotors for a predetermined period of time and the subsequent renewed switching over to the normal direction of rotation of the rotors.
- the reverse operation of the rotors can also be triggered automatically by a controller as needed, for example, if an increase in the current at which an electric motor is operated as a rotary drive for the rotors, is determined.
- a change in the current can, for. B. interpreted as an indication of an increased power consumption, which in turn is an indication of a clogging of the acceleration chamber.
- the reversing operation can also be carried out regularly, for example, in the case of using the conveyor device according to the invention for the waste water from a toilet in the context of each toilet flush.
- a rotor axis in the axial direction promoting moment and a pronounced turbulence of the liquid-solid suspension in the acceleration chamber during reverse rotation of the rotors is obtained by the rotor blades are aligned with their main extension planes inclined relative to its plane of rotation about the rotor axis. They are in the same direction and equally inclined, so that there is a rotationally symmetrical arrangement of the rotor blades in their entirety. An additional inclination of the rotor blades to the rotor axis is possible, but not necessary.
- first rotor and the second have a common rotary drive. Even with a common rotary drive still different directions of rotation and speeds can be realized by an effective between the two rotors gear.
- the first rotor and the second rotor are rotatably connected together. In particular, it can be two regions of a rigid component, which is also referred to here as a rotor unit. This component can be manufactured in a single production step.
- the leading edge and the trailing edge of each rotor blade are preferably formed as cutting edges, wherein it forms with the edge formed as a cutting edge solids in the liquid-solid suspension at Run the rotor in the normal Ab representativecardi and with the trailing edge formed as a cutting edge solids split during reverse.
- the rotor blades in the circumferential direction around the rotor axis preferably at a distance which is at least the maximum width the rotor blades corresponds, and the number of rotor blades is not greater than six. Preferably, it is between three and five. Most preferably, four rotor blades are provided.
- the number of blades of the other rotor is preferably the same as the number of rotor blades, d. H. it is two to six, preferably three to five and most preferably also four.
- a maximum outer circumference of the vanes is preferably the same size as an outer circumference of a hub of the rotor, from which the rotor blades protrude radially.
- the annular or circular surfaces swept over by the rotor blades and the blades do not overlap.
- the free distance of the wings in the conveying device according to the invention from the inner wall of the acceleration chamber makes up at least one third of the maximum radial extent of the wings.
- this free distance is at least 50%, more preferably 100% of the maximum radial extent of the wings.
- the rotor with the wings also determines the flow through this space. This applies at least if it, as it is provided in the conveying device according to the invention, with rotational speeds of the order of 2,000 U / min and more is driven.
- the outflow for the wastewater from the acceleration chamber preferably lies on the side of the second rotor facing away from the inlet with the rotor blades, ie not on the outer circumference of this rotor. This improves the cleaning effect of the rotor with the rotor blades with respect to solids that can be deposited at the outlet of the process from the acceleration chamber, and the reverse rotation of the rotor with the rotor blades are detected not only by the tips of the rotor blades, but their entire cutting edges.
- a labyrinth seal may be provided between the second rotor and an adjacent inner wall of the acceleration chamber to prevent the penetration of solid components into the area of a passage for a drive shaft for the rotors into the acceleration chamber. This is particularly avoided that fibrous objects penetrate to the drive shaft of the second rotor and to be wound on this.
- the inflow to the accelerating chamber may be at the lowest point of a toilet bowl of the toilet.
- the conveyor is then provided in a toilet, which is not a water closet with a water-filled U-tube. This is a prerequisite that the toilet on the one hand gets along with little flushing water and on the other hand, the risk of spilling water during heavy movements of the toilet, such as on board a ship is avoided.
- Fig. 1 shows a conveying device 1 for a liquid-solid suspension 2, which passes via an inlet 3 from above into an acceleration chamber 4.
- a Rotor unit 5 is arranged in the acceleration chamber 4 in the acceleration chamber 4 .
- the rotor unit 5 can be driven with a rotary drive not shown in the figures about a vertical rotor axis 6, in both directions of rotation about the rotor axis 6.
- the rotor unit 5 is in Fig. 2 shown separately and comprises two in the direction of the rotor axis 6 successively connected rotors 7 and 8.
- the inlet 3 facing rotor 7 has four wings 9, which extend with their main directions of extension axially and radially to the rotor axis 6.
- the maximum diameter of the rotor 7 with the wings 9 is the same size as the diameter of a hub 10 of the rotor 8, protrude from the four rotor blades 11 radially.
- the wings 9 fall approximately in the region of trailing edges 12 of the rotor blades 11, which rise from these trailing edges to leading edges 13.
- the rotor blades 11 are set with their main extension planes relative to their plane of rotation about the rotor axis 6.
- the rotor 7 with the wings 9 has a free distance with respect to an inner wall 14 of the acceleration chamber 4 flared bell-shaped from the inlet 3, which is about as large as the maximum radius of the rotor 7.
- the rotor blades 11, however, are sufficient Tips close to the inner wall 14 of the acceleration chamber 4, and their distance to an underlying end face 15 of the acceleration chamber is small above a drain 16, so that the entrained flow of the rotor blades in this sequence 16 occurs.
- the reaching into the acceleration chamber 4 liquid-solid suspension 2 passes at rotating rotor unit 5 initially in the area of action of the wings 9 of the rotor 7 and is accelerated by them in the radial direction, d. H. distributed over the entire horizontal cross section of the acceleration chamber 4.
- the inner wall 14 of the here bell-shaped acceleration chamber 4 deflects the flow down into the area of the rotor blades 11 of the rotor 8.
- the rotor blades 11 further accelerate the flow downwards and in the circumferential direction about the rotor axis 6 into the outlet 16.
- the high-speed rotor blades 11 divide larger solids in the liquid-solid suspension, which otherwise might not enter the drain 16 without clogging. From the drain 16, the liquid-solid suspension 2 typically exits into a tank or other storage container.
- Fig. 3 shows the lower part of the acceleration chamber 4 with the front side 15.
- This end face 15 is formed helically, wherein it merges into the drain 16 at its lowest point.
- the upper boundary of the outlet 16 represents a disturbing edge 17, at which solids can be deposited.
- Fig. 4 shows a toilet 18 with a conveyor 1 according to Fig. 1
- the inlet 3 at the lowest point of the toilet bowl 19 connects, and by driving the rotor unit 5 in the acceleration chamber 4 of the conveyor 1, the toilet bowl 19 can be completely sucked out, as for toilets in vehicles, at where a water seal is associated with the risk of spilling water, is preferred.
- the toilet 18 shown here is an odor trap by water.
- the water level is below the inlet 3 from the toilet bowl 19 and above the drain 16 from the acceleration chamber 4 and thus in a lower lying, Outside of the visible area of the toilet 18.
- a backwashing of solids in the visible area of the toilet bowl 19 is thus prevented even with shocks.
- the backward rotation of the rotor unit 5 to eliminate blockages by solids can be automatically triggered by an electronic control of the rotary drive for the rotor unit 5, also not shown here. But it can also be triggered by pressing a switch or any other actuator by the user of the toilet 18.
Description
Die Erfindung bezieht sich auf eine Fördervorrichtung für Flüssig-Fest-Suspensionen, insbesondere für Abwasser aus einer Toilette, mit dem Merkmal des Oberbegriffs des unabhängigen Patentanspruchs 1.The invention relates to a conveying device for liquid-solid suspensions, in particular for waste water from a toilet, with the feature of the preamble of independent claim 1.
Wenn in der folgenden Beschreibung der Begriff "Abwasser", insbesondere in der Form "Abwasser aus einer oder der Toilette" verwendet wird, so steht er dabei synonym für den Begriff "Flüssig-Fest-Suspension". D. h., auch wenn bestimmte Erklärungen nur im Zusammenhang mit Abwasser gegeben werden, gelten sie genauso für andere Flüssig-Fest-Suspensionen.When the term "waste water" is used in the following description, in particular in the form of "wastewater from one or the toilet", it is synonymous with the term "liquid-solid suspension". That is, even if certain explanations are given only in the context of wastewater, they apply equally to other liquid-solid suspensions.
Bei herkömmlichen Toiletten in festen Gebäuden wird das Abwasser, in dem sich verschiedene Feststoffe befinden können, durch Wasserströmung und Schwerkraft in einen Abwasserkanal überführt und gelangt von dort in eine Kläranlage. Bei Toiletten in Fahrzeugen, wie beispielsweise Wohnwagen, Bussen, Zügen, Schiffen und Flugzeugen, steht häufig nicht ausreichend Spülwasser zur Verfügung, und insbesondere ist kein Anschluss an einen Abwasserkanal vorhanden. Hier sind daher häufig Fördervorrichtungen notwendig, die das mit Feststoffen belastete Abwasser aus einer Toilette abführen, um es z. B. in einen Sammelbehälter zu überführen. Auch bei nachträglich in festen Gebäuden installierten Toiletten sind derartige Fördervorrichtungen hilfreich, wenn für die Abfuhr von Feststoffen mit Spülwasser und Schwerkraft keine ausreichend großen Rohrquerschnitte zur Verfügung stehen.In conventional toilets in solid buildings, the wastewater, in which various solids can be located, is transferred by water flow and gravity into a sewer and from there into a sewage treatment plant. In toilets in vehicles, such as caravans, buses, trains, ships and aircraft, is often insufficient rinse water available, and in particular, no connection to a sewer is present. Here, therefore, often conveyors are necessary to discharge the polluted with solids wastewater from a toilet to make it z. B. to transfer into a collection container. Also in subsequently installed in solid buildings toilets such conveyors are helpful if there are no sufficiently large pipe cross-sections available for the removal of solids with rinse water and gravity.
Wenn die Erfindung hier als "Fördervorrichtung" bezeichnet wird, so schließt dies nicht aus, dass sie auch eine wesentliche Funktion in der Zerkleinerung in der Flüssig-Fest-Suspension enthaltenen Feststoffe hat. Dies ist bei einer Fördervorrichtung für Abwasser aus einer Toilette häufig Voraussetzung dafür, dass das Abwasser durch ein Leitungsrohr mit einem vergleichsweise kleinen Leitungsquerschnitt störungsfrei hindurchgefördert werden kann.When the invention is referred to herein as a "conveyor", this does not exclude that it also has an essential function in the comminution of solids contained in the liquid-solid suspension. In the case of a delivery device for waste water from a toilet, this is frequently a prerequisite for the waste water to be conveyed through a conduit having a comparatively small line cross-section without interference.
Aus der
Bei dem bekannten Zerkleinerungs- und Abführzusatz für Klosettbecken stellt sich als nachteilig heraus, dass die Rotoren den freien Querschnitt des Rohrabschnitts verringern und allein dadurch die Gefahr einer Verstopfung durch in dem Abwasser von der Toilette enthaltenen Feststoffen setzen. Diese Gefahr wird durch die feststehenden Zerkleinerungsmesser noch erhöht. Hier besteht überdies die Gefahr, dass sich Feststoffe zwischen den Zerkleinerungsmessern und den zwecks Beschleunigung des Abwassers auf die Zerkleinerungsmesser hin angestellten Rotorblättern des oberen Rotors verkeilen. Eine Umkehrbarkeit der Drehrichtung der Antriebswelle zur Beseitigung von Verstopfungen des Zerkleinerungs- und Abführzusatzes ist in der
Aus der
Die freien Durchtrittsquerschnitte der Beschleunigungskammer auf Höhe des Rotors sind vergleichsweise klein. Daher besteht die Gefahr, dass größere Feststoffe in dem Abwasser mit der von dem Rotor hervorgerufenen Strömung des Flüssiganteils an den Rotor angesaugt werden und diesen verstopfen. Eine derartige Verstopfung kann vielfach nur durch Öffnen der Beschleunigungskammer beseitigt werden. Eine Umkehrung der Drehrichtung des Rotors um die Rotorachse, die in der
Aus der
In der
Die
In der
Der Erfindung liegt die Aufgabe zugrunde, eine Fördervorrichtung für Flüssig-Fest-Suspensionen aufzuzeigen, bei der die Gefahr von Verstopfungen durch größere Feststoffe konstruktionsbedingt deutlich reduziert ist. Darüber hinaus soll es möglich sein, dennoch aufgetretene Verstopfungen der Fördervorrichtung durch gröbere Feststoffe gezielt zu beseitigen, ohne die Fördervorrichtung öffnen zu müssen oder ohne dass die verstopfenden Feststoffe in den Bereich einer angeschlossenen Toilette zurückgelangen.The invention has for its object to show a delivery device for liquid-solid suspensions, in which the risk of blockages by larger solids construction is significantly reduced. In addition, it should be possible to eliminate any clogging of the conveyor due to coarser solids, without having to open the conveyor or without the clogging solids in the area of a connected toilet back.
Die Aufgabe der Erfindung wird durch eine Fördervorrichtung mit den Merkmalen des unabhängigen Patentanspruchs 1 gelöst. Bevorzugte Ausführungsformen der erfindungsgemäßen Fördervorrichtung sind den abhängigen Patentansprüchen definiert. Der Patentanspruch 20 ist auf eine Toilette mit einer erfindungsgemäßen Fördervorrichtung gerichtet.The object of the invention is achieved by a conveying device with the features of independent claim 1. Preferred embodiments of the conveying device according to the invention are defined in the dependent claims.
Eine erfindungsgemäße Fördervorrichtung für Flüssig-Fest-Suspensionen, insbesondere für Abwasser aus einer Toilette, weist eine Beschleunigungskammer, einen in der Beschleunigungskammer um eine Rotorachse drehangetriebenen ersten Rotor, der mehrere Flügel aufweist, deren beiden Haupterstreckungsrichtungen axial und radial zu der Rotorachse verlaufen, und einen um die Rotorachse drehangetriebenen zweiten Rotor, wobei der Rotor radial zu der Rotorachse ausgerichtete Rotorblätter aufweist, auf. Ein Zulauf für das Abwasser mündet bezogen auf die Rotorachse axial in die Beschleunigungskammer ein. Die Beschleunigungskammer erweitert sich von der Einmündung des Zulaufs glockenförmig. Der erste Rotor ist auf der dem Zulauf zugekehrten Seite des zweiten Rotors angeordnet, wobei die Flügel des ersten Rotors einen freien Abstand zu einer Innenwand der Beschleunigungskammer von mindestens 33 % der maximalen radialen Erstreckung der Flügel aufweisen. Der Ablauf für das Abwasser geht bezogen auf die Rotorachse tangential von der Beschleunigungskammer ab.A conveying device according to the invention for liquid-solid suspensions, in particular for wastewater from a toilet, has an acceleration chamber, a first rotor driven in the acceleration chamber about a rotor axis, which has a plurality of vanes, whose two main directions extend axially and radially to the rotor axis, and a The second rotor rotatably driven about the rotor axis, the rotor having rotor blades aligned radially with respect to the rotor axis. An inlet for the wastewater opens axially with respect to the rotor axis in the acceleration chamber. The acceleration chamber widens bell-shaped from the inlet of the inlet. The first rotor is disposed on the upstream side of the second rotor, wherein the blades of the first rotor have a free distance to an inner wall of the acceleration chamber of at least 33% of the maximum radial extent of the wings. The effluent for the wastewater is tangential with respect to the rotor axis of the acceleration chamber.
Bei der neuen Fördervorrichtung stehen für das Abwasser und die in diesem enthaltenen Feststoffe große freie Durchtrittsquerschnitte in der Beschleunigungskammer zur Verfügung. Der erste Rotor, der der Einmündung des Zulaufs in die Beschleunigungskammer zugewandt ist, weist dazu einen vergleichsweise großen freien Abstand zu der ihm nächsten Innenwand der Beschleunigungskammer auf. Vorzugsweise bleibt dieser freie Abstand zu der Innenwand der sich hier glockenförmig erweiternden Beschleunigungskammer im Wesentlichen gleich, und ein von den Flügeln des dem axialen Zulauf zugekehrten ersten Rotors überstrichenes Volumen ist entsprechend abgerundet. Zudem ruft der erste Rotor bei seiner Rotation um die Rotorachse eine Zentrifugalkraft auf das in die Beschleunigungskammer einströmende Abwasser auf, die das Abwasser und die in ihm enthaltenen Feststoffe über den gesamten Querschnitt der Beschleunigungskammer verteilt. Derart aufgeteilt gelangt das Abwasser und gelangen die in ihm enthaltenen Feststoffe in den Einwirkungsbereich des nächsten Rotors. Erst die Rotorblätter dieses zweiten Rotors wirken auf größere Bestandteile der in dem Abwasser enthaltenen Feststoffe im Sinne einer Zerkleinerung ein. Dabei treffen diese Feststoffe aufgrund der Aufteilung des Abwassers mit Hilfe des dem Zulauf zugewandten Rotors mit den Flügeln nicht massiert, sondern vereinzelt auf die Rotorblätter und werden so leichter von diesen zerkleinert.In the new conveyor device are available for the wastewater and the solids contained in this large free passage cross-sections in the acceleration chamber. The first rotor, which faces the mouth of the inlet into the acceleration chamber, has a comparatively large free distance to the next inner wall of the acceleration chamber. Preferably, this free distance to the inner wall of the here bell-shaped widening acceleration chamber remains substantially the same, and one of the wings of the axial inlet facing the first rotor swept volume is correspondingly rounded. In addition, as the rotor rotates about the rotor axis, it causes a centrifugal force on the effluent entering the accelerating chamber, which distributes the effluent and the solids contained therein over the entire cross section of the accelerating chamber. Divided in this way, the wastewater passes and the solids contained in it reach the area of action of the next rotor. Only the rotor blades of this second rotor act on larger components of the solids contained in the wastewater in terms of comminution. These solids meet due to the division of the wastewater with the help of the inlet facing rotor with the wings not massaged, but isolated on the rotor blades and are thus easier to crush them.
Bei der erfindungsgemäßen Fördervorrichtung ist eine Drehantriebsrichtung der Rotoren um die Rotorachse umkehrbar. Wichtig ist dabei eigentlich nur die Umkehrbarkeit der Drehantriebsrichtung des zweiten Rotors mit den Rotorblättern, weil nur durch diese Drehantriebsrichtungsumkehr die Förderrichtung der erfindungsgemäßen Fördervorrichtung in Bezug auf den Ablauf des Abwassers aus der Beschleunigungskammer umgekehrt wird. Die Funktion des dem Zulauf des Abwassers in die Beschleunigungskammer zugekehrten ersten Rotors ist von seiner Drehrichtung im Wesentlichen unabhängig. Diese Unabhängigkeit der Funktionsweise des Rotors mit den Flügeln führt auch dazu, dass das Abwasser und insbesondere die in ihm enthaltenen Feststoffe bei der Änderung der Drehantriebsrichtung des zweiten Rotors mit den Rotorblättern nicht in Rückwärtsrichtung durch den Zulauf aus der Beschleunigungskammer austreten. Vielmehr wird das Abwasser durch den ersten Rotor mit den Flügeln im glockenförmigen Bereich der Beschleunigungskammer immer nach außen beschleunigt und dort von der Innenwand auf den zweiten Rotor mit den Rotorblättern umgelenkt. Die Rotorblätter dieses Rotors schlagen einerseits auf in dem Abwasser enthaltene Feststoffe und zerteilen diese und beschleunigen andererseits wieder in den Bereich des Rotors mit den Flügeln. So bildet sich in der Beschleunigungskammer eine heftige Umlaufströmung des Abwassers aus, die selbst für sich genommen, aufgrund der in ihr wirkenden Scherkräfte, eine erhebliche zerkleinernde Wirkung auf in dem Abwasser enthaltene Feststoffe hat. Hinzukommt die zerkleinernde Wirkung der mit dem zweiten Rotor schnell umlaufenden Rotorblätter. Wenn also durch Drehrichtungsumkehr der Rotoren bei der erfindungsgemäßen Fördervorrichtung eine Verstopfung durch Feststoffe im Bereich des Ablaufs aus der Beschleunigungskammer aufgelöst wird, werden diese Feststoffe mit höchster Wahrscheinlichkeit so zerkleinert, dass sie beim anschließenden Antrieb der Rotoren in normaler Abförderrichtung problemlos in den Ablauf eintreten und abgeführt werden.In the conveying device according to the invention, a rotational drive direction of the rotors about the rotor axis is reversible. What is important is actually only the reversibility of the rotational drive direction of the second rotor with the rotor blades, because only through this rotational drive direction reversal, the conveying direction of the conveyor device according to the invention in relation to the flow of waste water from the acceleration chamber is reversed. The function of the inflow of the wastewater into the acceleration chamber facing first rotor is essentially independent of its direction of rotation. This independence of the functioning of the rotor with the wings also leads to the wastewater and In particular, the solids contained in it in the change of the rotational drive direction of the second rotor with the rotor blades do not escape in the reverse direction through the inlet from the acceleration chamber. Rather, the wastewater is always accelerated by the first rotor with the wings in the bell-shaped area of the acceleration chamber to the outside and deflected there from the inner wall to the second rotor with the rotor blades. On the one hand, the rotor blades of this rotor strike solids contained in the wastewater and split them and on the other hand accelerate again into the area of the rotor with the wings. Thus, in the acceleration chamber, a violent recirculation flow of the waste water forms, which, taken by itself, due to the shearing forces acting in it, has a considerable comminuting effect on solids contained in the waste water. Added to this is the comminuting effect of the rotor blades rotating rapidly with the second rotor. Thus, if by reversing the direction of rotation of the rotors in the conveyor device according to the invention a blockage is dissolved by solids in the region of the expiration from the acceleration chamber, these solids are most likely crushed so that they easily enter the drain and then discharged in the subsequent discharge of the rotors in the normal Abförderrichtung become.
Die Drehrichtungsumkehr kann bei der erfindungsgemäßen Fördervorrichtung manuell durch Betätigen eines Betätigungselements ausgelöst werden, wenn beispielsweise der Benutzer auf akustischem Wege, dass ein Drehantrieb für die Rotoren nicht die übliche Drehzahl erreicht oder optischem Wege feststellt, dass das Abwasser nicht mehr aus einer an die Fördervorrichtung angeschlossenen Toilette abgesaugt wird. Das Betätigen des Betätigungselements löst vorzugsweise den Rückwärtslauf der Rotoren für einen vorgegebenen Zeitraum und das anschließende erneute Umschalten auf die normale Drehrichtung der Rotoren aus.The direction of rotation can be triggered manually in the conveyor device according to the invention by pressing an actuator when, for example, the user acoustically that a rotary drive for the rotors does not reach the usual speed or optically determines that the sewage is no longer connected from one to the conveyor Toilet is sucked off. The actuation of the actuating element preferably triggers the reverse rotation of the rotors for a predetermined period of time and the subsequent renewed switching over to the normal direction of rotation of the rotors.
Der Umkehrbetrieb der Rotoren kann auch durch eine Steuerung nach Bedarf automatisch ausgelöst werden, wenn beispielsweise ein Anstieg des Stroms, mit dem ein Elektromotor als Drehantrieb für die Rotoren betrieben wird, festgestellt wird. Eine derartige Veränderung des Stroms kann z. B. als Hinweis auf eine erhöhte Leistungsaufnahme interpretiert werden, die wiederum ein Indiz für eine Verstopfung der Beschleunigungskammer ist. Der Umkehrbetrieb kann auch regelmäßig durchgeführt werden, beispielsweise im Falle der Verwendung der erfindungsgemäßen Fördervorrichtung für das Abwasser aus einer Toilette im Rahmen jeder Toilettenspülung.The reverse operation of the rotors can also be triggered automatically by a controller as needed, for example, if an increase in the current at which an electric motor is operated as a rotary drive for the rotors, is determined. Such a change in the current can, for. B. interpreted as an indication of an increased power consumption, which in turn is an indication of a clogging of the acceleration chamber. The reversing operation can also be carried out regularly, for example, in the case of using the conveyor device according to the invention for the waste water from a toilet in the context of each toilet flush.
Ein in axialer Richtung der Rotorachse förderndes Moment und eine ausgeprägte Verwirbelung der Flüssig-Fest-Suspension in der Beschleunigungskammer beim Rückwärtslauf der Rotoren ergibt sich, indem die Rotorblätter mit ihren Haupterstreckungsebenen relativ zu ihrer Rotationsebene um die Rotorachse geneigt ausgerichtet sind. Dabei sind sie gleichsinnig und gleich stark geneigt, so dass sich eine drehsymmetrische Anordnung der Rotorblätter in ihrer Gesamtheit ergibt. Eine zusätzliche Neigung der Rotorblätter zu der Rotorachse ist möglich, aber nicht notwendig.A rotor axis in the axial direction promoting moment and a pronounced turbulence of the liquid-solid suspension in the acceleration chamber during reverse rotation of the rotors is obtained by the rotor blades are aligned with their main extension planes inclined relative to its plane of rotation about the rotor axis. They are in the same direction and equally inclined, so that there is a rotationally symmetrical arrangement of the rotor blades in their entirety. An additional inclination of the rotor blades to the rotor axis is possible, but not necessary.
Bei einer neuen Fördervorrichtung können für die beiden Rotoren getrennte Drehantriebe vorgesehen sein. Diese ermöglicht es beispielsweise, die Rotoren auf unterschiedliche Drehzahlen und/oder unterschiedliche Drehrichtungen anzusteuern. In einer praktischen Ausführungsform der erfindungsgemäßen Vorrichtung weisen der erste Rotor und der zweite jedoch einen gemeinsamen Drehantrieb auf. Selbst bei einem gemeinsamen Drehantrieb können noch unterschiedliche Drehrichtungen und Drehzahlen durch ein zwischen den beiden Rotoren wirksames Getriebe realisiert werden. Praktischerweise werden der erste Rotor und der zweite Rotor jedoch drehfest miteinander verbunden. Insbesondere kann es sich um zwei Bereiche eines starren Bauteils handeln, das hier auch als Rotoreinheit bezeichnet wird. Dieses Bauteil kann in einem einzigen Herstellungsschritt hergestellt sein. Dabei kann es sich jedoch als günstig erweisen, die Rotorblätter des zweiten Rotors aus einem abriebfesteren Material auszubilden und beispielsweise in eine Kunststoffspritzform einzulegen, in der sie dann zur Ausbildung des restlichen, beide Rotoren ausbildenden Bauteils mit Kunststoff umspritzt werden und so ihre Verankerung erfahren.In a new conveyor device separate rotary actuators may be provided for the two rotors. This makes it possible, for example, to control the rotors to different speeds and / or different directions of rotation. In a practical embodiment of the device according to the invention, however, the first rotor and the second have a common rotary drive. Even with a common rotary drive still different directions of rotation and speeds can be realized by an effective between the two rotors gear. Conveniently, however, the first rotor and the second rotor are rotatably connected together. In particular, it can be two regions of a rigid component, which is also referred to here as a rotor unit. This component can be manufactured in a single production step. However, it may prove to be advantageous to form the rotor blades of the second rotor of a more abrasion-resistant material and insert, for example, in a plastic injection mold in which they are then encapsulated to form the remaining, both rotors forming component with plastic and so experience their anchoring.
Da bei der erfindungsgemäßen Fördervorrichtung der Rotor mit den Rotorblättern vorzugsweise in beiden Drehrichtungen um die Rotorachse drehantreibbar ist, sind die Vorderkante und die Hinterkante jedes Rotorblatts vorzugsweise als Schneidkanten ausgebildet, wobei es mit der als Schneidkante ausgebildeten Vorderkante Feststoffe in der Flüssig-Fest-Suspension beim Lauf des Rotors in normaler Abförderrichtung und mit der als Schneidkante ausgebildeten Hinterkante Feststoffe beim Rückwärtslauf zerteilt.Since in the conveying device according to the invention the rotor with the rotor blades is rotatably drivable in both directions of rotation about the rotor axis, the leading edge and the trailing edge of each rotor blade are preferably formed as cutting edges, wherein it forms with the edge formed as a cutting edge solids in the liquid-solid suspension at Run the rotor in the normal Abförderrichtung and with the trailing edge formed as a cutting edge solids split during reverse.
Damit auch größere Festkörper sich nicht zwischen den Rotorblättern festsetzen können, sondern mit der Strömung der Flüssig-Fest-Suspension zwischen die Rotorblätter des schnell laufenden Rotors gelangen können, weisen die Rotorblätter in Umfangsrichtung um die Rotorachse vorzugsweise einen Abstand auf, der mindestens der maximalen Breite der Rotorblätter entspricht, und die Anzahl der Rotorblätter ist nicht größer als sechs. Vorzugsweise liegt sie zwischen drei und fünf. Am meisten bevorzugt sind vier Rotorblätter vorgesehen.So that larger solids can not settle between the rotor blades, but can get along with the flow of liquid-solid suspension between the rotor blades of the high-speed rotor, the rotor blades in the circumferential direction around the rotor axis preferably at a distance which is at least the maximum width the rotor blades corresponds, and the number of rotor blades is not greater than six. Preferably, it is between three and five. Most preferably, four rotor blades are provided.
Die Anzahl der Flügel des anderen Rotors ist vorzugsweise genauso groß wie die Anzahl der Rotorblätter, d. h. sie beträgt zwei bis sechs, vorzugsweise drei bis fünf und am meisten bevorzugt ebenfalls vier.The number of blades of the other rotor is preferably the same as the number of rotor blades, d. H. it is two to six, preferably three to five and most preferably also four.
Weiterhin ist ein maximaler Außenumfang der Flügel vorzugsweise gleich groß wie ein Außenumfang einer Nabe des Rotors, von dem die Rotorblätter radial abstehen. D. h., in einer axialen Projektion überlagern sich die von den Rotorblättern und den Flügeln überstrichenen Ring- bzw. Kreisflächen nicht. So können die beiden Rotoren in der Beschleunigungskammer getrennte Teilströmungen in Richtung auf den jeweils anderen Rotor bzw. zum Ablauf aus der Beschleunigungskammer ausbilden.Furthermore, a maximum outer circumference of the vanes is preferably the same size as an outer circumference of a hub of the rotor, from which the rotor blades protrude radially. In other words, in an axial projection, the annular or circular surfaces swept over by the rotor blades and the blades do not overlap. Thus, the two rotors in the acceleration chamber can form separate partial flows in the direction of the respective other rotor or for the discharge from the acceleration chamber.
Wenn Freiräume in Umfangsrichtung um die Rotorachse zwischen den Flügeln des einen Rotors in Freiräume in Umfangsrichtung um die Rotorachse zwischen den Rotorblättern des anderen Rotors übergehen, sind in der erfindungsgemäßen Fördervorrichtung Durchtritte mit maximalem freien Querschnitt für größere Feststoffe bis in den Bereich des Rotors mit den Rotorblättern vorhanden, wo sie von den schnell laufenden Rotorblättern zerkleinert werden.If free spaces in the circumferential direction about the rotor axis between the wings of a rotor in free spaces in the circumferential direction about the rotor axis between the rotor blades of the other rotor, are in the inventive conveyor passageways with maximum free cross-section for larger solids into the region of the rotor with the rotor blades where they are crushed by the high-speed rotor blades.
Es wurde bereits angesprochen, dass der freie Abstand der Flügel bei der erfindungsgemäßen Fördervorrichtung von der Innenwand der Beschleunigungskammer mindestens ein Drittel der maximalen radialen Erstreckung der Flügel ausmacht. Vorzugsweise beträgt dieser freie Abstand mindestens 50 %, noch mehr bevorzugt 100 % der maximalen radialen Erstreckung der Flügel. Dennoch bestimmt der Rotor mit den Flügeln auch die Durchströmung dieses Freiraums. Dies gilt zumindest dann, wenn er, wie es bei der erfindungsgemäßen Fördervorrichtung vorgesehen ist, mit Drehzahlen der Größenordnung 2.000 U/min und mehr angetrieben wird.It has already been mentioned that the free distance of the wings in the conveying device according to the invention from the inner wall of the acceleration chamber makes up at least one third of the maximum radial extent of the wings. Preferably, this free distance is at least 50%, more preferably 100% of the maximum radial extent of the wings. Nevertheless, the rotor with the wings also determines the flow through this space. This applies at least if it, as it is provided in the conveying device according to the invention, with rotational speeds of the order of 2,000 U / min and more is driven.
Der Ablauf für das Abwasser aus der Beschleunigungskammer liegt bei der erfindungsgemäßen Fördervorrichtung vorzugsweise auf der dem Zulauf abgekehrten Seite des zweiten Rotors mit den Rotorblättern, d. h. nicht am Außenumfang dieses Rotors. Hierdurch verbessert sich die Reinigungswirkung des Rotors mit den Rotorblättern in Bezug auf Feststoffe, die sich am Austritt des Ablaufs aus der Beschleunigungskammer ablagern können, und die beim Rückwärtslauf des Rotors mit den Rotorblättern nicht nur von den Spitzen der Rotorblätter, sondern deren gesamten Schneidkanten erfasst werden.In the case of the conveying device according to the invention, the outflow for the wastewater from the acceleration chamber preferably lies on the side of the second rotor facing away from the inlet with the rotor blades, ie not on the outer circumference of this rotor. This improves the cleaning effect of the rotor with the rotor blades with respect to solids that can be deposited at the outlet of the process from the acceleration chamber, and the reverse rotation of the rotor with the rotor blades are detected not only by the tips of the rotor blades, but their entire cutting edges.
Wenn eine axiale Stirnfläche der Beschleunigungskammer auf der dem Ablauf zugekehrten Seite des Rotors einen um die Rotorachse wendelförmig Abschnitt aufweist, der mit einem Sprung der Stirnfläche endet, in dessen Bereich der Ablauf von der Beschleunigungskammer abgeht, wird die Flüssig-Fest-Suspension von dem Rotor mit den Rotorblättern in diesen in Richtung der Rotorachse neben dem Rotor liegenden Ablauf hinein gefördert. Dabei ist jedoch die obere Begrenzung des Ablaufs eine unvermeidbare Störkante, an der sich Feststoffe absetzen können. Durch Umkehrung der Drehrichtung des Rotors mit den Rotorblättern können diese Feststoffe jedoch von der Störkante abgenommen werden. Bei dieser umgekehrten Drehrichtung weist die axiale Stirnfläche der Beschleunigungskammer auf der Ablaufseite durch ihren wendelförmigen Verlauf keine zwangsläufige Störkante auf. Damit wird vermieden, dass die abgelösten Feststoffe den Rotor bei seinem Rückwärtslauf blockieren.When an axial end face of the accelerating chamber on the downstream side of the rotor has a helical portion around the rotor axis terminating with a jump of the end face in the region of which the drain leaves the accelerating chamber, the liquid-solid suspension becomes from the rotor promoted with the rotor blades in this lying in the direction of the rotor axis adjacent to the rotor flow. However, the upper limit of the process is an unavoidable disturbing edge on which solids can settle. By reversing the direction of rotation of the rotor with the rotor blades, however, these solids can be removed from the interfering edge. In this reverse direction of rotation, the axial end face of the acceleration chamber on the discharge side by its helical course on no inevitable interference edge. This avoids that the detached solids block the rotor during its reverse run.
Zwischen dem zweiten Rotor und einer angrenzenden Innenwand der Beschleunigungskammer kann eine Labyrinthdichtung vorgesehen sein, um das Eindringen von festen Bestandteilen, in den Bereich einer Durchführung für eine Antriebswelle für die Rotoren in die Beschleunigungskammer zu vermeiden. Hiermit wird insbesondere vermieden, dass fasrige Objekte bis zu der Antriebswelle des zweiten Rotors vordringen und sich auf dieser festwickeln.Between the second rotor and an adjacent inner wall of the acceleration chamber, a labyrinth seal may be provided to prevent the penetration of solid components into the area of a passage for a drive shaft for the rotors into the acceleration chamber. This is particularly avoided that fibrous objects penetrate to the drive shaft of the second rotor and to be wound on this.
Wenn die erfindungsgemäße Fördervorrichtung für das Abwasser aus einer Toilette vorgesehen wird, kann der Zulauf zu der Beschleunigungskammer am tiefsten Punkt eines Toilettenbeckens der Toilette liegen. D. h., die Fördervorrichtung ist dann bei einer Toilette vorgesehen, die kein Wasserklosett mit einem wassergefüllten U-Rohr ist. Dies ist Voraussetzung dafür, dass die Toilette zum einen mit wenig Spülwasser auskommt und zum anderen die Gefahr des Verschüttens von Wasser bei stärkeren Bewegungen der Toilette, wie beispielsweise an Bord eines Schiffs vermieden wird.When the waste water conveying device according to the present invention is provided from a toilet, the inflow to the accelerating chamber may be at the lowest point of a toilet bowl of the toilet. D. h., The conveyor is then provided in a toilet, which is not a water closet with a water-filled U-tube. This is a prerequisite that the toilet on the one hand gets along with little flushing water and on the other hand, the risk of spilling water during heavy movements of the toilet, such as on board a ship is avoided.
Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Patentansprüchen, der Beschreibung und den Zeichnungen. Die in der Beschreibungseinleitung genannten Vorteile von Merkmalen und von Kombinationen mehrerer Merkmale sind lediglich beispielhaft und können alternativ oder kumulativ zur Wirkung kommen, ohne dass die Vorteile von allen erfindungsgemäßen Ausführungsformen erzielt werden müssen. Ohne dass hierdurch der Gegenstand der beigefügten Patentansprüche verändert wird, gilt hinsichtlich des Offenbarungsgehalts der ursprünglichen Anmeldungsunterlagen und des Patents Folgendes: weitere Merkmale sind den Zeichnungen - insbesondere den dargestellten Geometrien und den relativen Abmessungen mehrerer Bauteile zueinander sowie deren relativer Anordnung und Wirkverbindung - zu entnehmen. Die Kombination von Merkmalen unterschiedlicher Ausführungsformen der Erfindung oder von Merkmalen unterschiedlicher Patentansprüche ist ebenfalls abweichend von den gewählten Rückbeziehungen der Patentansprüche möglich und wird hiermit angeregt. Dies betrifft auch solche Merkmale, die in separaten Zeichnungen dargestellt sind oder bei deren Beschreibung genannt werden. Diese Merkmale können auch mit Merkmalen unterschiedlicher Patentansprüche kombiniert werden. Ebenso können in den Patentansprüchen aufgeführte Merkmale für weitere Ausführungsformen der Erfindung entfallen.Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the introduction to the description are merely exemplary and can come into effect alternatively or cumulatively without the advantages of all the embodiments according to the invention having to be achieved. Without thereby the object With regard to the disclosure content of the original application documents and the patent, the following applies: Further features can be taken from the drawings-in particular the illustrated geometries and the relative dimensions of several components relative to one another and their relative arrangement and operative connection. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.
Die Erfindung wird im Folgenden anhand eines bevorzugten Ausführungsbeispiels unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert und beschrieben.
- Fig. 1
- ist ein Schnitt durch die erfindungsgemäße Fördervorrichtung längs deren Rotorachse, wobei diese Rotorachse vertikal ausgerichtet ist.
- Fig. 2
- ist eine perspektivische Ansicht der als Einheit ausgebildeten Rotoren der Fördervorrichtung gemäß
Fig. 1 . - Fig. 3
- ist eine perspektivische Ansicht von oben in die geöffnete Beschleunigungskammer der Fördervorrichtung gemäß
Fig. 1 mit Blick auf deren ablaufseitige Stirnfläche; und - Fig. 4
- ist ein Vertikalschnitt durch eine mit der erfindungsgemäßen Fördervorrichtung ausgestattete Toilette.
- Fig. 1
- is a section through the conveyor device according to the invention along the rotor axis, said rotor axis is aligned vertically.
- Fig. 2
- FIG. 12 is a perspective view of the unitary rotors of the conveyor device according to FIG
Fig. 1 , - Fig. 3
- is a perspective view from above into the opened acceleration chamber of the conveyor according to
Fig. 1 with a view to its drain-side end face; and - Fig. 4
- is a vertical section through a toilet equipped with the conveyor device according to the invention.
Die Rotoreinheit 5 ist in
Der Rotor 7 mit den Flügeln 9 weist gegenüber einer Innenwand 14 der sich von dem Zulauf 3 aus glockenförmig nach unten erweiternden Beschleunigungskammer 4 einen freien Abstand auf, der etwa so groß ist wie der maximale Radius des Rotors 7. Die Rotorblätter 11 hingegen reichen mit ihren Spitzen bis nahe an die Innenwand 14 der Beschleunigungskammer 4 heran, und ihr Abstand zu einer darunter liegenden Stirnfläche 15 der Beschleunigungskammer wird oberhalb eines Ablaufs 16 klein, damit die von den Rotorblättern mitgerissene Strömung in diesen Ablauf 16 eintritt. Die in die Beschleunigungskammer 4 gelangende Flüssig-Fest-Suspension 2 gelangt bei rotierender Rotoreinheit 5 zunächst in den Einwirkungsbereich der Flügel 9 des Rotors 7 und wird durch diese in radialer Richtung beschleunigt, d. h. über den gesamten horizontalen Querschnitt der Beschleunigungskammer 4 verteilt. Die Innenwand 14 der hier glockenförmigen Beschleunigungskammer 4 lenkt die Strömung nach unten in den Bereich der Rotorblätter 11 des Rotors 8 um. Die Rotorblätter 11 beschleunigen die Strömung weiter nach unten und in Umfangsrichtung um die Rotorachse 6 in den Ablauf 16 hinein. Zugleich zerteilen die schnell laufenden Rotorblätter 11 größere Feststoffe in der Flüssig-Fest-Suspension, die sonst möglicherweise nicht verstopfungsfrei in den Ablauf 16 eintreten könnten. Aus dem Ablauf 16 tritt die Flüssig-Fest-Suspension 2 typischerweise in einen Tank oder einen anderen Aufbewahrungsbehälter aus.The rotor 7 with the
Wenn es zu einer Verstopfung des Ablaufs 16 kommt, die typischerweise am Punkt seines Austritts aus der Beschleunigungskammer 4 auftritt, kann diese durch Umkehr der Drehrichtung der Rotoreinheit 5 um die Rotorachse 6 beseitigt werden. Die Rotorblätter 11 nehmen dann Feststoffe, die sich im Bereich des Austritts des Ablaufs 16 aus der Beschleunigungskammer 4 abgesetzt haben, ab und beschleunigen sie nach oben. Durch diese Beschleunigung gelangen sie jedoch nicht zurück in den Zulauf 3, weil die Flügel 9 des Rotors 7 unabhängig von der Drehrichtung der Rotoreinheit 5 eine Beschleunigung nach außen bewirken. Beim Rücklauf der Rotoreinheit 5 kommt es so zu einer heftigen Verwirbelung in der Beschleunigungskammer 4. Die resultierenden Scherkräfte zerkleinern die Feststoffe in der Suspension zusätzlich zu der Wirkung der als Schneidkanten ausgebildeten Hinterkanten 12 und Vorderkanten 13 der Rotorblätter 11.If there is a blockage of the
Aus
- 11
- Fördervorrichtungconveyor
- 22
- Flüssig-Fest-SuspensionLiquid-solid suspension
- 33
- ZulaufIntake
- 44
- Beschleunigungskammeracceleration chamber
- 55
- Rotoreinheitrotor unit
- 66
- Rotorachserotor axis
- 77
- Rotorrotor
- 88th
- Rotorrotor
- 99
- Flügelwing
- 1010
- Nabehub
- 1111
- Rotorblattrotor blade
- 1212
- Hinterkantetrailing edge
- 1313
- Vorderkanteleading edge
- 1414
- Innenwandinner wall
- 1515
- Stirnwandbulkhead
- 1616
- Ablaufprocedure
- 1717
- Störkanteinterfering edge
- 1818
- ToiletteToilet
- 1919
- Toilettenbeckentoilet bowl
- 2020
- Innenwandinner wall
- 2121
- Labyrinthdichtunglabyrinth seal
Claims (13)
- Conveying device (1) for liquid-solid suspensions (2), in particular for effluent from a toilet (18), comprising- an acceleration chamber (4),- a first rotor (7) rotary-driven about a rotor axis (6) in the acceleration chamber (4) and comprising a plurality of wings (9) whose two directions of main extension extend axially and radially relative to the rotor axis (6),- a second rotor (8) rotary-driven about the rotor axis (6) in the acceleration chamber (4) and comprising a plurality of rotor blades (11) aligned radial relative to the rotor axis (6),- an inlet (3) opening out into the acceleration chamber (4) axially relative to the rotor axis (6), and- an outlet (16) going off the acceleration chamber (4) tangentially relative to the rotor axis (6),- wherein the acceleration chamber (4), away from the opening of the inlet (3), expands in a bell-shaped manner,- wherein the first rotor (7) is located at that side of the second rotor (8) facing the inlet, and- wherein the wings (9) of the first rotor (7) have a clearance relative to an inner wall (14) of the acceleration chamber (4) of at least 33 % of the maximum radial extension of the wings (9),
characterised in- that the first rotor (7) faces the opening of the inlet in the acceleration chamber (4),- that the rotor blades (11) of the second rotor are arranged with their planes of main extension being tilted in the same direction relative to their rotation planes about the rotor axis (6), and- that a rotary drive direction of at least one of the rotors (7, 8) about the rotor axis (6) is reversible. - Conveying device (1) according to claim 1, characterised in that the first rotor (7) and the second rotor (8) comprise a common rotary drive, wherein, optionally, the first rotor (7) and the second rotor (8) are connected with each other in a rotary-fixed way.
- Conveying device (1) according to any of the preceding claims, characterised in that in circumferential direction about the rotor axis (6), the rotor blades (11) have a distance which at least equates to the maximum width of the rotor blades (11).
- Conveying device (1) according to any of the preceding claims, characterised in that the number of the rotor blades is 2 to 6, preferably 3 to 5, and that the number of wings (9) radially extending from the rotor axis (6) is 2 to 6, preferably 3 to 5, wherein, optionally, the number of rotor blades (11) and the number of wings (9) are the same.
- Conveying device (1) according to any of the preceding claims, characterised in that a maximum external circumference of the wings (9) is the same as an external circumference of a hub (10) of the second rotor (8) from which the rotor blades (11) stick out radially.
- Conveying device (1) according to any of the preceding claims, characterised in that a volume covered by the wings (9) of the first rotor (7) is rounded.
- Conveying device (1) according to any of the preceding claims, characterised in that the clearance of the wings (9) relative to the inner wall (14) of the acceleration chamber is at least 50 %, preferably 100 %, of the maximum radial extension of the wings (9).
- Conveying device (1) according to any of the preceding claims, characterised in that a rotary speed at which the rotors are rotary-driven is at least 1,500 rpm, preferably at least 2,000 rpm.
- Conveying device (1) according to any of the preceding claims, characterised in that the outlet (16) is going off the acceleration chamber (4) on that side of the second rotor (8) facing away from the inlet (3).
- Conveying device (1) according to any of the preceding claims, characterised in that on that side of the second rotor (8) facing the outlet (16), an axial end surface (15) of the acceleration chamber (4) comprises a section helically guiding around the rotor axis (6) and ending with a step of the end surface (15), in the region of which the outlet (16) goes off the acceleration chamber (4).
- Conveying device (1) according to any of the preceding claims, characterised in that a labyrinth seal (21) is formed between the second rotor (8) and a neighbouring inner wall (20) of the acceleration chamber (4).
- Toilet (18) with a conveying device (1) according to any of the preceding claims, characterised in that the inlet (13) to the acceleration chamber (4) is located at a lowest point of a toilet bowl (19).
- Toilet (18) according to claim 12, characterised in that a control unit is provided which automatically reverts the rotary drive direction during each toilet flushing and/or which reverts the rotary drive direction when the rotors (7, 8) block in the present rotary drive direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20120159309 EP2639459B1 (en) | 2012-03-13 | 2012-03-13 | Pump device for solid-liquid suspensions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20120159309 EP2639459B1 (en) | 2012-03-13 | 2012-03-13 | Pump device for solid-liquid suspensions |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2639459A1 EP2639459A1 (en) | 2013-09-18 |
EP2639459B1 true EP2639459B1 (en) | 2014-04-30 |
Family
ID=45887933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120159309 Not-in-force EP2639459B1 (en) | 2012-03-13 | 2012-03-13 | Pump device for solid-liquid suspensions |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2639459B1 (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2032008A5 (en) | 1969-02-14 | 1970-11-20 | Lecat Roger | |
US4780053A (en) * | 1978-04-10 | 1988-10-25 | Johan Gullichsen | Method and apparatus for pumping fiber suspensions |
SE467466B (en) * | 1989-03-29 | 1992-07-20 | Kamyr Ab | DEVICE FOR FLUIDIZATION, GAS SEPARATION AND PUMPING OF A SUSPENSION OF FIBER-containing CELLULO MATERIAL, AND ITS APPLICATION |
SE520740C2 (en) * | 1998-06-30 | 2003-08-19 | Abs Pump Prod Ab | centrifugal |
EP1464764A1 (en) | 2003-03-24 | 2004-10-06 | Thomas Warnecke | Water closet |
-
2012
- 2012-03-13 EP EP20120159309 patent/EP2639459B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP2639459A1 (en) | 2013-09-18 |
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