EP3839260B1 - Pompe centrifuge dotée d'une soupape automatique - Google Patents

Pompe centrifuge dotée d'une soupape automatique Download PDF

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Publication number
EP3839260B1
EP3839260B1 EP20210973.2A EP20210973A EP3839260B1 EP 3839260 B1 EP3839260 B1 EP 3839260B1 EP 20210973 A EP20210973 A EP 20210973A EP 3839260 B1 EP3839260 B1 EP 3839260B1
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EP
European Patent Office
Prior art keywords
valve
pump
centrifugal pump
opening
pump chamber
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.)
Active
Application number
EP20210973.2A
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German (de)
English (en)
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EP3839260A1 (fr
Inventor
Olaf Klare
Wolfgang Geier
Benjamin Wegner
Johannes REUSCHEL
Adrian Kocjan
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Wilo SE
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Wilo SE
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Publication of EP3839260A1 publication Critical patent/EP3839260A1/fr
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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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/16—Pumping installations or systems with storage reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/006—Priming of not self-priming pumps by venting gas or using gas valves

Definitions

  • the invention relates to a centrifugal pump for conveying a fluid with a pump housing forming a pump chamber, an impeller being provided in the pump chamber, a suction opening for sucking in the fluid into the pump chamber being provided in the pump housing and in the pump housing relative to the suction opening behind the impeller a ventilation opening is provided. Furthermore, the invention relates to the use of the above centrifugal pump as a submersible sewage and/or sewage pump. Furthermore, the invention relates to a lifting system comprising a collection container and the above centrifugal pump.
  • centrifugal pumps In centrifugal pumps, a rotating movement of an impeller is used to convey a fluid.
  • the fluid to be pumped enters a pump chamber of the centrifugal pump via a suction opening, is picked up by the rotating impeller and then transported into a line section, which is also referred to as a pressure pipe.
  • circular pumps are used as waste water pumps, in particular pumps for waste water lifting systems, in which the waste water is usually collected in a collecting container for temporary storage.
  • the centrifugal pump must be vented so that the fluid can flow into the pump chamber after each pumping process and the centrifugal pump can deliver with high efficiency.
  • the ventilation opening is usually located at the highest point of the pump chamber, above the impeller in the case of vertically installed centrifugal pumps.
  • the effect can occur that the pressure conditions described above are reversed, so that there is a lower absolute pressure at the ventilation opening within the pump chamber than the pressure on the side facing away from the pump chamber the vent hole.
  • the pressure on the side of the ventilation opening facing away from the pump chamber generally corresponds to the ambient pressure of the pump in open systems or to the pressure in the collection tank of the wastewater lifting station in closed wastewater lifting systems.
  • the pamphlet U.S. 3,246,606 A describes a self-priming liquid pump unit comprising a pump housing, an impeller rotatably mounted therein, the housing having an outlet opening, an inlet eyelet which opens coaxially to the axis of rotation of the impeller towards an interior of the housing, an opening towards the interior of the housing, wherein the orifice is located in a circumferential zone of substantially neutral pressure radially outward of the impeller axis where the state of pressure within the casing changes from negative to positive during pumping, and passage means communicating with the orifice through which air passes during suction at the beginning of Pumping is discharged in one direction from inside the housing.
  • the pamphlet DE 10 2013 018731 A1 describes a biogas plant with a pump device, the pump device and a method for operating the pump device with at least one rotary pump device.
  • the rotary pump device has a suction side and a pressure side and includes a housing device.
  • the housing device has an inlet for a working fluid on the suction side and an outlet for the working fluid on the pressure side.
  • a conveying area is provided between the inlet and the outlet, with a rotation device having a blade device being arranged in the conveying area, which conveys the working fluid from the inlet through the conveying area to the outlet.
  • the outlet for the working fluid is guided essentially laterally outwards on the pressure side of the rotary pump device and the rotation device is designed and suitable for conveying the working fluid laterally outwards into the outlet on the pressure side of the rotary pump device.
  • a separating device is arranged on the pressure side of the rotary pump device in the axial direction and the rotary device has an opening in the axially outer region on the pressure side for separating working fluid with a significant proportion of gas into the separating device.
  • the pamphlet U.S. 3,741,675 A discloses an application of a duckbill valve as a pump delivery line vent valve.
  • the valve is designed in such a way that it is closed when the pressure on the valve inlet side and valve outlet side is the same.
  • a centrifugal pump for conveying a fluid with a pump housing forming a pump chamber, an impeller being provided in the pump chamber, a suction opening for sucking the fluid into the pump chamber being provided in the pump housing, in the pump housing in relation to the suction opening a vent opening is provided behind the impeller, and wherein an automatic valve is provided at the vent opening, through which air can escape from the pump chamber.
  • an automatic valve is understood to mean a valve which opens and closes automatically without auxiliary energy.
  • the opening and closing process of the valve is not made possible by electrical energy, but by mechanically provided energy.
  • the mechanical energy for opening and closing the valve can be provided by the valve itself and/or by the medium flowing through the valve.
  • the automatic valve is designed such that it is due of pressure differences between a valve inlet side and a valve outlet side opens and / or closes.
  • the valve inlet side is the side of the valve inside the pump chamber at the ventilation opening.
  • the automatic valve allows air to escape from the pump chamber, which means that the centrifugal pump can properly vent the pump chamber, so that fluid can flow through the suction opening into the pump chamber after each pumping process.
  • the valve allows air to flow from the valve inlet side to the valve outlet side.
  • the automatic valve ensures that the centrifugal pump can deliver with high hydraulic efficiency.
  • the automatic valve prevents air from flowing in the opposite direction, i.e. from outside the pump, through the ventilation opening into the pump chamber. In other words, the valve prevents air from flowing from the valve outlet side to the valve inlet side.
  • the hydraulic efficiency of the centrifugal pump according to the invention is constantly high even at low delivery heads and large volume flows of the fluid to be delivered.
  • the centrifugal pump can preferably be used for a hydraulic system in a building, for example in a sewage lifting system.
  • the fluid can also contain solids, with the solids contained in the fluid being able to include impurities of any kind, for example dirt, paper, faeces or the like.
  • the fluid is conveyed by the rotating movement of the impeller.
  • the impeller is connected to a drive motor via a motor shaft that extends in the axial direction.
  • the fluid flows from outside the pump through the suction opening in the pump housing into the pump chamber in which the rotating impeller is located.
  • a centrifugal force occurring in the radial direction is used to convey the fluid, so that centrifugal pumps are also referred to as centrifugal pumps.
  • the fluid is preferably conveyed from the pump chamber into a line section, which is also referred to as a pressure pipe.
  • the centrifugal pump has the suction port behind the impeller vent opening.
  • the ventilation opening is preferably located at the highest point of the pump chamber. The air escaping through the vent opening may have a fluid content.
  • the suction opening of the centrifugal pump is at the lowest point of the pump housing, so that the centrifugal pump can pump out the fluid as far as possible without large amounts of residual fluid remaining below the suction opening.
  • the axial direction of the motor shaft corresponds to the vertical direction.
  • the vent opening is preferably above the level at which the impeller is attached to the motor shaft.
  • the motor shaft extends in the horizontal direction.
  • the suction opening is usually not at the lowest point of the pump housing.
  • the ventilation opening is preferably located next to the attachment point of the impeller on the motor shaft and on the side of the impeller facing away from the suction opening.
  • the automatic valve allows air to escape from the pump chamber and prevents air from outside the pump from entering the pump chamber via the vent opening.
  • the valve is designed in such a way that it is open when the pressure in the pump chamber at the ventilation opening is at least the same as the ambient pressure on the valve outlet side. In other words, this means that the valve is open when the pressure on the valve inlet side and valve outlet side is the same. This allows the air to escape unhindered from the valve and out of the pump chamber when the pump is pumping.
  • the venting of the pump chamber is therefore without resistance, i.e. an overpressure does not have to build up in the pump chamber to open the valve before the air can escape from the pump chamber.
  • the centrifugal pump when the centrifugal pump is pumping, a leakage flow of the fluid from the pump chamber through the ventilation opening has to be accepted.
  • the ambient pressure on the valve outlet side corresponds to the pressure in the collection tank of the sewage lifting plant.
  • the ambient pressure on the valve outlet side corresponds to the ambient pressure outside the pump, i.e. usually normal pressure.
  • the valve is designed in such a way that it closes when the pressure in the pump chamber at the vent opening is lower than the ambient pressure on the valve outlet side. In other words, the valve closes as soon as the pressure on the valve inlet side is lower than on the valve outlet side.
  • the valve can prevent air from outside the pump from entering the pump chamber via the vent opening.
  • the valve preferably closes due to the volume flow of air that occurs for a short time from the valve outlet side to the valve inlet side. More preferably, the kinetic energy of the volume flow is used to close the valve.
  • the valve closes as soon as a lower pressure is established on the valve inlet side than on the valve outlet side and remains closed as long as these pressure conditions persist. In this way, the valve prevents air from flowing back into the pump chamber.
  • the valve is designed as a self-closing flap valve.
  • the self-closing flap valve is preferably at least partially open when the pressure on the valve inlet side corresponds to the pressure on the valve outlet side. More preferably, it is possible that a flap of the flap valve through the air passing from the valve inlet side to the valve outlet side during venting of the pump and/or as a loss flow passing fluid is opened further during operation of the pump. If, for example, the pump is operated in the right-hand characteristic curve area, i.e.
  • the valve preferably has a dimensional stability such that the valve opens completely when the pressure in front of and behind the valve is the same.
  • the self-closing flap valve has the advantage that it is very robust due to its simple structure and can be produced without great effort.
  • the valve is designed as a duckbill valve.
  • the duckbill valve is preferably a valve made of elastic material, which is shaped like a duck's beak.
  • the end of the duckbill valve that corresponds to the valve inlet side preferably has a shape that corresponds to the ventilation opening.
  • the other end of the duckbill valve, ie the end corresponding to the valve outlet side preferably has a flattened shape.
  • the duckbill valve is designed to allow unrestricted air flow from the pump chamber through the vent opening. If, on the other hand, the flow reverses so that air briefly flows from outside the pump through the ventilation opening into the pump chamber, the valve closes and thereby prevents any fluid contaminated with solids and air from flowing back into the pump chamber.
  • the duckbill valve has the advantage that it closes even with very small pressure differences between the valve inlet side and the valve outlet side and has a very short response time.
  • the valve is designed as a tubular valve with two flaps, which abut one another in the event of a backflow and/or abut one another in the event of a backflow.
  • the end of the valve corresponding to the valve inlet side preferably has a tubular shape and the end corresponding to the valve outlet side has two lobes.
  • the tabs are preferably two opposing tab-like end pieces of the hose cover. The closing of the valve is preferably achieved by in the event of a reverse flow, the flaps of the valve come together and thus close off a cross-section of the hose.
  • valve In the event of a back pressure, the flaps remain together and the cross-section is closed, so that the valve prevents air from flowing into the pump chamber when the pressure conditions are reversed.
  • the valve has the advantage that it responds to very small pressure differences between the valve inlet side and the valve outlet side and closes the cross section very quickly.
  • the valve is made from an elastomer, preferably from a fluorinated elastomer. Since the valve preferably undergoes a change in shape for closing and opening, it has been found to be advantageous if the valve is made of an elastomer.
  • rubber particularly preferably fluororubber (FKM)
  • FKM fluororubber
  • FKM perfluoro rubber
  • FEPM tetrafluoroethylene/propylene rubber
  • FVMQ fluorinated silicone rubber
  • the materials mentioned have the advantage that they are particularly resistant to chemicals, which is particularly favorable for sewage lifting plants because of the faeces. Furthermore, the mechanical properties, in particular the deformability and workability of the materials, are particularly suitable for producing the automatic valve. In addition, the elastomer can be made of other elastic materials.
  • the wall thickness of the valve decreases from the valve inlet side to the valve outlet side.
  • the decreasing wall thickness gives the material of the valve the necessary flexibility to close and open.
  • the wall thickness is preferably 2 mm on the valve inlet side and 0.4 mm on the valve outlet side, more preferably 0.2 mm.
  • the cross section of the valve is circular on the valve inlet side and circular, elliptical, almond and/or lens-shaped on the valve outlet side.
  • the diameter of the circular valve outlet side is preferably larger than the diameter of the elliptical, almond and/or lenticular valve outlet side.
  • the valve has a conically decreasing shape, in which the diameter of the Valve inlet side steadily reduced to the valve outlet side.
  • the conical shape preferably has a gradient angle of 3 degrees.
  • the valve can be attached directly to the side of the ventilation opening facing away from the pump chamber.
  • a ventilation channel integrated into the pump housing or a ventilation hose connected to the pump housing is provided between the valve and the ventilation opening.
  • a vent hose between the vent opening and the valve increases the flexibility of the centrifugal pump.
  • the ventilation hose is preferably flexible, so that, particularly in the case of sewage lifting plants, the loss flow can be returned to the collection tank of the sewage lifting plant through a separate opening in the collection tank.
  • the handling and robustness of the pump is simplified by the ventilation channel integrated into the pump housing.
  • the integrated ventilation channel preferably leads away from the ventilation opening to an outside of the centrifugal pump. Due to the integration of the ventilation duct in the pump housing, the ventilation duct can hardly break away from the pump housing.
  • the centrifugal pump has a drive motor, with the impeller being operatively connected to a motor shaft of the drive motor.
  • the rotational movement of the impeller which is responsible for conveying the fluid, is preferably transmitted from the drive motor to the impeller via a motor shaft extending in the axial direction.
  • the suction opening is designed concentrically to the axis of the motor shaft.
  • the suction opening is thus also arranged concentrically to the impeller.
  • the pump housing is attached to a motor flange of the drive motor.
  • the centrifugal pump according to the invention is basically suitable for pumping any fluid. Due to its robustness against solids and chemicals, the centrifugal pump is particularly suitable for use as a submersible sewage and/or sewage pump. Sewage and/or sewage submersible pumps are used in particular for pumping dirty water, for example from floods, in flooded construction pits, in laundry rooms, in muddy pits, in biotopes and/or from garden ponds, from seepage shafts and in cellars, and in particular for pumping water with different degrees of contamination such as stones, mud or debris faeces. The proposed use ensures low-noise operation and reliable venting of the pump chamber of the dirty water and/or sewage submersible pump.
  • centrifugal pump can also be used for heating with radiators, radiator heating, underfloor heating, ceiling cooling, water circulation in a drinking water system or a drinking water system with a storage charging system, with the above list not being exhaustive, but rather including other types of systems not mentioned here can.
  • a lifting system comprising a collection container and a centrifugal pump as described above, wherein the centrifugal pump can be connected to the collection container in such a way that the suction opening faces an interior of the collection container and the automatic valve can be connected to the collection container.
  • the automatic valve is not attached directly to the ventilation opening, but instead the ventilation channel integrated into the pump housing or the ventilation hose connected to the pump housing is provided between the valve and the ventilation opening. In this way, the valve is easily accessible and can easily be guided back into the collection container and attached to it.
  • the collection tank of the lifting system it is possible for the collection tank of the lifting system to have an opening that is designed to correspond to the pump housing.
  • the opening of the collection container can be closed by applying the pump to the opening, with the suction opening of the centrifugal pump advantageously facing the interior of the collection container.
  • the flexible vent hose is provided between the valve and the vent opening. This allows the valve to be attached to a further opening on the collection container and in this way to lead the leakage flow back into the collection container.
  • a container wall of the collecting container is formed by the pump housing having the suction opening.
  • the container wall is shaped in such a way that it forms a lower part of an at least two-part pump housing.
  • the opening in the container wall is therefore the suction opening of the centrifugal pump.
  • the ventilation channel integrated into the pump housing is provided between the valve and the ventilation opening.
  • the integrated ventilation channel preferably leads away from the ventilation opening to an outside of the centrifugal pump, which is preferably also formed by the container wall. In this way, the automatic valve can be mounted directly on the container wall and feed the leakage flow back into the collection container. Due to this construction, the lifting station has a very compact shape.
  • a drive motor of the centrifugal pump is arranged at least partially outside the collection container. It has proven to be advantageous, particularly with regard to the maintenance of the lifting system, if the drive motor is arranged at least partially outside the collection container.
  • the drive motor is preferably positioned completely outside the collection container.
  • FIG 1 shows a schematic sectional view of a centrifugal pump 10 in a lifting station 12 according to a preferred embodiment of the invention.
  • the centrifugal pump 10 has a pump housing 16 forming a pump chamber 14 .
  • An impeller 18 is arranged within the pump chamber 14 .
  • the impeller 18 is connected to a drive motor 24 of the centrifugal pump 10 via a motor shaft 22 extending in the axial direction 20 .
  • the pump housing 16 has a suction opening 26 concentric to the axis 20 of the motor shaft 22 through which a fluid can flow into the pump chamber 14 . Captured by the rotary movement of the impeller 18, the fluid is fed into a pressure port 28 (only in figure 4 shown) promoted.
  • the suction opening 26 of the centrifugal pump 10 is located at the lowest point of the pump housing 16, and the axial direction 20 of the motor shaft 22 corresponds to the vertical direction. Furthermore, the pump housing 16 of the centrifugal pump 10 has a ventilation opening 30 behind the impeller 18 in relation to the suction opening 26 . With the centrifugal pump 10 in figure 1 is the vent 30 at the highest point of the Pump chamber 14 and above the height at which the impeller 18 is attached to the motor shaft 18. An automatic valve 32 is provided at the ventilation opening 30 through which air can escape from the pump chamber 14 . In the present case, the valve 32 connects to the vent opening 30 via a flexible vent hose 34 .
  • the lifting system 12 also has a collection container 36 which can be connected to the centrifugal pump 10 .
  • a container wall 38 of the collection container 36 has an opening which is designed to correspond to the pump housing 16 .
  • the centrifugal pump 10 and the collection container 36 are connected in such a way that the suction opening 26 of the centrifugal pump 10 faces an interior of the collection container 36 .
  • the valve 32 is fitted in a further opening of the collection container 36, so that the ventilation opening 30 is connected to the interior of the collection container 36 via the ventilation hose 34 and the valve 32.
  • the side of the valve 32 that faces the ventilation opening 30 corresponds to a valve inlet side 40 and the side of the valve 32 that faces the interior of the collecting container 36 corresponds to a valve outlet side 42.
  • figure 2 12 shows a perspective view of the valve 32 from FIG figure 1 .
  • the valve 32 is designed as a duckbill valve 32b, where figure 2 shows the valve 32b in the open state.
  • the cross section of the valve 32b on the valve inlet side 40 is cylindrical in the present case and designed to correspond to the cross section of the ventilation hose 34 .
  • the cross section of the valve 32b on the valve outlet side 42 is presently almond-shaped and somewhat smaller than the cross section of the valve inlet side 40.
  • the valve 32b thus has a conical shape, with a pitch angle of 3 degrees.
  • a wall thickness 44 decreases from the valve inlet side 40 to the valve outlet side 42 from 4 mm to 0.4 mm.
  • the valve 32b On the valve outlet side 42, the valve 32b has two opposing tabs 46, which are formed from an outer surface of the valve 32b.
  • the valve 32b is presently made of FKM.
  • FIG 3 shows a schematic sectional view of a centrifugal pump 10 not according to the invention in the lifting station 12 with an alternative embodiment of the valve 32 according to a further preferred one embodiment of the invention.
  • the valve is 32 in figure 3 designed as a self-closing flap valve 32a.
  • the cross section of the valve 32a in figure 3 is circular for the valve inlet side 40 as for the valve outlet side 42, the diameter being the same.
  • a circular flap 48 is located on the valve outlet side 42.
  • valve 32a is not attached to a flexible venting hose 34, but rather to a venting channel 50 integrated into the pump housing 16.
  • the valve 32a also opens into the collection container 36 of the lifting system 12.
  • at least part of the container wall 38 is formed by the pump housing 16 having the suction opening 26 .
  • the container wall 38 is shaped in such a way that it forms a lower part of the at least two-part pump housing 16 .
  • the ventilation channel 50 integrated into the pump housing 16 leads away from the ventilation opening 30 in the pump chamber 14 to an outside of the centrifugal pump 10 which is also formed by the container wall 38 .
  • FIG 4 shows a schematic sectional view of the centrifugal pump 10 in the lifting station 12, according to a further preferred embodiment of the invention.
  • the valve 32 is in figure 4 analogous to Figure 1 and 2 designed as a duckbill valve 32b. Analogous to figure 3 the valve 32b is mounted on the venting channel 50 integrated into the pump housing 16.
  • the collection container 36 is also analogous to the lifting system 12 in figure 3 built up.
  • the impeller 18 is an impeller 18 that is open on one side and that the centrifugal pump has a generous pump chamber 14 with a large suction opening 26 .
  • the fluid sucked into the pump chamber 14 through the suction opening 26 is conveyed predominantly by radial flow into the pressure nozzle 28 . Due to the impeller 18 that is open on one side, the spacious pump chamber 14 and the generous diameter of the pressure connection 28, the circular pump 10 is particularly suitable for pumping fluids mixed with solids.

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Claims (10)

  1. Pompe centrifuge (10) pour transporter un fluide avec un carter de pompe (16) formant un espace de pompe (14), dans laquelle
    un rotor (18) est prévu dans l'espace de pompe (14),
    un orifice d'aspiration (26) est prévu dans le carter de pompe (16) pour aspirer le fluide dans l'espace de pompe (14),
    un orifice de ventilation (30) est prévu dans le carter de pompe (16) derrière le rotor (18) par rapport à l'orifice d'aspiration (26), et
    dans laquelle au niveau de l'orifice de ventilation (30) est prévue une soupape à bec de canard (32b) ou une soupape tubulaire (32) avec deux languettes (46) qui se juxtaposent en cas de courant inverse et/ou sont juxtaposées en cas de contre-pression, de l'air pouvant s'échapper de l'espace de pompe (14) par la soupape, lorsqu'au moins la même pression qu'une pression ambiante sur un côté de sortie (42) de la soupape est disponible dans l'espace de pompe (14) à l'orifice de ventilation (30).
  2. Pompe centrifuge (10) selon la revendication 1, dans laquelle la soupape (32) est arrangée de sorte qu'elle se ferme lorsqu'une pression plus faible qu'une pression ambiante sur un côté de sortie (42) de la soupape est disponible dans l'espace de pompe (14) à l'orifice de ventilation (30).
  3. Pompe centrifuge (10) selon l'une quelconque des revendications précédentes, dans laquelle la soupape (32) est formée d'un élastomère, de préférence un élastomère fluoré.
  4. Pompe centrifuge (10) selon l'une quelconque des revendications précédentes, dans laquelle entre la soupape (32) et l'orifice de ventilation (30) est prévu un canal de ventilation (50) intégré dans le carter de pompe (16) ou un tuyau de ventilation (34) connecté au carter de pompe (16).
  5. Pompe centrifuge (10) selon l'une quelconque des revendications précédentes, incluant un moteur de commande (24), un rotor (18) étant connecté de manière opérationnelle à un arbre moteur (22) du moteur de commande (24).
  6. Pompe centrifuge (10) selon l'une quelconque des revendications précédentes, dans laquelle l'orifice d'aspiration (26) est réalisé de façon concentrique à l'axe (20) de l'arbre moteur (22).
  7. Utilisation d'une pompe centrifuge (10) selon l'une quelconque des revendications précédentes en tant que pompe submersible pour eaux usées et/ou eaux résiduaires.
  8. Station de pompage (12) comprenant un récipient collecteur (36) et une pompe centrifuge (10) selon l'une quelconque des revendications précédentes, dans laquelle la pompe centrifuge (10) peut être connectée au récipient collecteur (36) de sorte que l'orifice d'aspiration (26) est orienté vers l'intérieur du récipient collecteur (36) et dans laquelle la soupape (32) automatique peut être connectée au récipient collecteur (36).
  9. Station de pompage (12) selon la revendication précédente, dans laquelle au moins une partie d'une paroi de bassin (38) du récipient collecteur (36) est formée du carter de pompe (16) présentant l'orifice d'aspiration (26).
  10. Station de pompage (12) selon l'une quelconque des revendications de station précédentes, dans laquelle un moteur de commande (24) de la pompe centrifuge (10) est disposé au moins partiellement en dehors du récipient collecteur (36).
EP20210973.2A 2019-12-18 2020-12-01 Pompe centrifuge dotée d'une soupape automatique Active EP3839260B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU101566A LU101566B1 (de) 2019-12-18 2019-12-18 Kreiselpumpe mit einem selbsttätigen Ventil

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EP3839260A1 EP3839260A1 (fr) 2021-06-23
EP3839260B1 true EP3839260B1 (fr) 2023-02-22

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Publication number Priority date Publication date Assignee Title
LU102895B1 (de) * 2021-12-22 2023-06-22 Wilo Se Kreiselpumpe zum Fördern eines Fluids

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741675A (en) * 1968-11-05 1973-06-26 Gorman Rupp Co Self-priming centrifugal pump with automatic air release valve

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US3246606A (en) * 1963-01-21 1966-04-19 Axel L Nielsen Pressure responsive pump
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PL3839260T3 (pl) 2023-06-05
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