EP3405677B1 - Entlüftungseinrichtung für eine pumpe in einem behälter - Google Patents

Entlüftungseinrichtung für eine pumpe in einem behälter Download PDF

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Publication number
EP3405677B1
EP3405677B1 EP17700799.4A EP17700799A EP3405677B1 EP 3405677 B1 EP3405677 B1 EP 3405677B1 EP 17700799 A EP17700799 A EP 17700799A EP 3405677 B1 EP3405677 B1 EP 3405677B1
Authority
EP
European Patent Office
Prior art keywords
housing part
container
impeller
centrifugal pump
motor
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
EP17700799.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3405677A1 (de
Inventor
Axel Schunk
Patrick Jung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB SE and Co KGaA
Original Assignee
KSB SE and Co KGaA
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Publication date
Application filed by KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Priority to PL17700799T priority Critical patent/PL3405677T3/pl
Publication of EP3405677A1 publication Critical patent/EP3405677A1/de
Application granted granted Critical
Publication of EP3405677B1 publication Critical patent/EP3405677B1/de
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Anticipated expiration legal-status Critical

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/22—Adaptations of pumping plants for lifting sewage
    • 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
    • F04D9/004—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 system with a container and an arrangement, which has a centrifugal pump, which is arranged in the container, and a motor for driving the centrifugal pump, which is arranged above the centrifugal pump, the centrifugal pump having an impeller and a first housing part ,
  • Such systems can be designed in particular as wastewater lifting plants. These discharge water that accumulates below the backflow level backflow-proof. They are used to pump sewage that is free of faeces and contains faeces, which accumulates in the basements of residential buildings. The waste water is collected in a container. The fill level is usually recorded using a level sensor. If a certain limit is reached, a centrifugal pump switches on, which pumps the waste water out of the tank.
  • the container has a receptacle for an arrangement.
  • the arrangement which comprises a centrifugal pump driven by a motor, is immersed in the waste water.
  • the engine protrudes from the container.
  • the impeller of the centrifugal pump is surrounded by a housing part.
  • the DE 10 2007 008 692 A1 shows a sewage lifting plant with a container in which sewage collects. At the top of the container, an opening is provided, into which an arrangement projects, which has a centrifugal pump with a motor.
  • the centrifugal pump comprises a housing part in which an impeller is arranged. The housing part with the impeller protrudes into the waste water. The wastewater is sucked in via a suction nozzle and transported out of the tank by the centrifugal pump.
  • the motor of the arrangement is connected to the impeller via a shaft.
  • the arrangement consisting of the pump housing with the impeller and the motor connected via a shaft, forms a unit.
  • the motor part protrudes from the container.
  • the arrangement is supported by flange rings or plates. Sealing devices are arranged between the flange rings or plates and the container, so that neither wastewater nor unpleasant smells escape from the container.
  • the system comprises an arrangement with a pump and a drive part.
  • the pump transports liquid from the container into a sewer network.
  • the pump housing with the suction nozzle protrudes into the container.
  • the drive part of the pump protrudes from the container.
  • centrifugal pumps In conventional sewage pumps, ventilation is ensured, for example, by open lines with a correspondingly large diameter. The resulting leakage water flow is accepted or returned to the inlet chamber. If centrifugal pumps are installed above the water level on the suction side and their suction line has a foot valve, they are filled by hand using a filling funnel on the pump suction nozzle or via a ventilation system, provided that they are not self-priming.
  • the pump room can be partially or completely filled with air, especially when starting up for the first time and when the tank is low.
  • the accumulated air must be removed before or during the start of the system.
  • the wastewater lifting plant comprises a pump that is driven by a vertical shaft.
  • the pump housing comprises a venting device which has a protective device against clogging by solids in the waste water.
  • the ventilation is arranged in the room behind the impeller, a vacuum can be created, particularly in the case of impellers with ribs on the back, which draws air.
  • Examples of such pumps are from the documents DE 295 22 235 U1 . DE 2 228 305 A1 . US 2,850,984 A and DE 10 2008 016 476 A1 known.
  • the object of the invention is to provide a system which has a reliable mode of operation and the highest possible efficiency, even when conveying media containing solids, in particular fibers.
  • the system should have the lowest possible noise level during operation.
  • the system has an arrangement with a centrifugal pump, which comprises a housing part which has a vent at the level of the impeller and / or above the level of the impeller.
  • the term "height" is understood as a perpendicular distance to a reference point.
  • the individual components of the arrangement are arranged with increasing height in the following order: inlet for medium, impeller with the first housing part, further housing part, motor.
  • the impeller is driven by a vertical shaft that is aligned vertically.
  • a ventilation device in the first housing part at the level of the impeller or above, enables effective ventilation of the centrifugal pump and at the same time reduces the risk of clogging of the ventilation devices.
  • an arrangement of the venting device in this position contributes to flushing or tearing off blockages and in this way a reliable venting of the pump is permanently guaranteed.
  • a high flow velocity in the radial direction prevents blockages in this area.
  • venting device is particularly suitable for lifting systems with a cutting unit, in particular for material containing fibers.
  • a gap for reducing the pressure is preferably formed between the impeller and a region of the first housing part. This also reduces the volume flow, which also has a favorable effect on avoiding blockages during ventilation.
  • the venting device preferably comprises at least one opening.
  • the vent can also be formed by the opening itself through which the air that has accumulated in the pump can escape.
  • the ventilation acts in the radial direction.
  • the ventilation device is arranged in such a way that the resulting leakage flow is directed to a line element, it proving to be particularly favorable if the leakage flow is directed to a pressure port of the centrifugal pump.
  • the arrangement preferably comprises a further housing part which is arranged above the first housing part, it proving to be advantageous if the further housing part is designed as a cover component.
  • the lid component forms a cover for an opening of the container, which forms a receptacle for the arrangement.
  • the cover component can be designed, for example, as a pressure cover.
  • the lid component supports the arrangement and has areas which rest on the upper side of the upper container wall, so that part of the arrangement projects into the container and part of the arrangement is arranged above the container opening and thus protrudes above the receptacle.
  • the cover component can also serve as a bearing bracket.
  • the first and the further housing part overlap with one another.
  • the first housing part can have a region which forms a receptacle for a region of the further housing part or, conversely, a region of the first housing part engages in a receptacle of the further housing part.
  • the first housing part is preferably designed as a spiral housing which at least partially surrounds the impeller.
  • the volute casing can have an impeller fitting as an area.
  • the impeller fitting forms a receptacle in that an area of the further area designed as a pressure cover engages. This area of the pressure cover is also referred to as the pressure cover fit.
  • the impeller fit of the volute casing and the pressure cover fit overlap.
  • the ventilation device can be arranged in addition to the first housing part in at least one further housing part. If two housing parts overlap, it proves to be advantageous if ventilation openings are introduced in both housing parts, which are aligned with respect to one another in such a way that the leakage flow flows through the two openings from the interior of the centrifugal pump into the container and thus ensures that the centrifugal pump is vented becomes.
  • the arrangement is preferably designed as a centrifugal pump unit, which forms a unit that can be completely assembled or disassembled.
  • the motor is at least partially arranged outside the container.
  • the motor is positioned completely outside the container.
  • the impeller of the centrifugal pump is connected to the motor via a vertical shaft arrangement.
  • a gap for pressure reduction and / or volume reduction is preferably formed between the impeller and a region of the first housing part.
  • a gap for ventilation can be arranged between a line element of the system and a component.
  • the gap between this line element and the component is preferably annular. It proves to be particularly advantageous if this line element and the component have a circular cross section or are designed like a hollow cylinder. A leakage flow occurs through the annular gap for ventilation, which creates a liquid carpet. With this construction, a seal is no longer required between this line element and the component.
  • this line element and the component are arranged at a distance from one another.
  • the transition from this line element and the component is used for this, so that a defined annular gap is created.
  • They are preferably at an axial and / or radial distance from one another.
  • the distance is less than 2 mm, preferably less than 1 mm, in particular less than 0.5 mm. It proves to be particularly advantageous if the distance is more than 0.01 mm, preferably more than 0.05 mm, in particular more than 0.08 mm.
  • this line element and / or the component has a surface which delimits the gap and is not planar.
  • recesses can be made in the abutting end faces of this line element and / or component.
  • the annular gap has one or more notches. The notches are created by making recesses in this line element and / or the component immediately adjacent to it.
  • Figure 1 shows a container 1 of a sewage lifting plant.
  • it is a plastic container that is designed for unpressurized operation. Waste water is temporarily stored in the container 1 and then conveyed into a sewer.
  • the container 1 has an area of higher construction with two inlets 2 and an area of lower construction. Furthermore, the container 1 has an emptying connection 3 and a hand hole 4, which is closed by a lid, which in Figure 1 is not shown.
  • Figure 1 the part of a sensor module 5 protruding from the container 1 can be seen, which in the exemplary embodiment is used as a level measuring device for detecting the Level is executed.
  • a level measuring device for detecting the Level is executed.
  • a float switch is used.
  • the container 1 has a vent connection 6.
  • the waste water collected in container 1 is conveyed out via an outlet arranged on container 1.
  • the lower part of the container 1 in terms of its height has a receptacle 8 for an in Figure 2 arrangement 9 shown.
  • the receptacle 8 is designed as a circular opening on an upper side of the container 1.
  • the arrangement 9 shown comprises a centrifugal pump 10 with a first housing part 11 designed as a spiral housing, a further housing part 12 designed as a pressure cover and a motor 13.
  • a pipeline 15 connects to a line element 14 for discharging the medium collected in the container 1.
  • the line element 14 is designed as a pressure port.
  • FIG 3 shows a perspective view of the arrangement from below.
  • the arrangement 9 has a cutter 16 for comminuting solid components of the medium.
  • the medium flows into the centrifugal pump 10 through openings 17 in a housing part 18.
  • the housing part 18 is designed as an impeller body.
  • the further housing part 12 has areas 19 with which the arrangement rests on the upper container wall.
  • Figure 4 shows a longitudinal section through the sewage lifting plant.
  • the arrangement 9 lies with an area 19, which are formed by the further housing part, on an upper container wall.
  • the arrangement 9 is connected to the container 1 by means of fastening means 20.
  • the fastening means 20 can be screws, for example.
  • the motor 13 is surrounded by a motor housing 21.
  • the motor 13 is an electric motor that has a stator and a rotor.
  • the motor 13 drives a shaft 22 which is supported by a bearing arrangement 23.
  • the shaft 22 is connected to an impeller 24.
  • the medium flows to the impeller 24 through openings 17.
  • the impeller 24 is surrounded by a first housing part 11, which is designed as a spiral housing.
  • the first housing part 11 has a region 25 which is designed as an impeller fitting in the exemplary embodiment.
  • the first housing part 11 has a suction area 26.
  • the suction region 26 is designed like a hollow cylinder and at least partially surrounds the cutting unit 16.
  • the impeller 24 is designed as a radial impeller and conveys the medium via the angled line element 14 into a pipeline 15.
  • Figure 5 shows a longitudinal section showing part of the centrifugal pump 10 in an enlarged view.
  • the first housing part 11 has a vent 27 above the impeller 24.
  • the vent 27 is designed as an arrangement of openings which are aligned with respect to one another and which are introduced in the region 25 of the first housing part and in a region 28 of the second housing part 12.
  • the area 28 is designed as a pressure cover fitting.
  • Gases in the pump escape through the vent 27 and flow through the first opening in the first housing part 11 and then through the second opening in parallel in the outer further housing part 12 into the container 1.
  • Figure 6 5 shows a radial section through the arrangement along the AA line according to FIG. 5 of a section of the centrifugal pump 10 which has the vent 27.
  • the vent 27 is directed onto the line element 14. The one from the vent 27 radially escaping leakage flow is spread and braked by the line element 14, so that noise is significantly reduced.
  • Figure 7 shows the further housing part 12 from above, which is designed in the embodiment as a pressure cover.
  • the further housing part 12 is a one-piece component, which is preferably made of a metallic material, in particular a cast.
  • the further housing part has a first hollow-cylindrical section 29 with a larger diameter, which is open toward the motor 13, and a second cylindrical section 30, which serves as a bearing bracket for a bearing arrangement 23 of the shaft 22.
  • a connector 31 is formed from the further housing part 12 for connection to the line element 14 and the pipeline 15.
  • Figure 8 shows the further housing part 12 from below.
  • Figure 8 shows an opening of the vent 27, which is designed in the exemplary embodiment as an aligned arrangement of openings.
  • the opening is made in a region 28 of the second housing part 12.
  • the area 28 is designed as a pressure cover fitting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP17700799.4A 2016-01-22 2017-01-11 Entlüftungseinrichtung für eine pumpe in einem behälter Active EP3405677B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17700799T PL3405677T3 (pl) 2016-01-22 2017-01-11 Urządzenie odpowietrzające do pompy w zbiorniku

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016200910.9A DE102016200910A1 (de) 2016-01-22 2016-01-22 Anlage
PCT/EP2017/050485 WO2017125297A1 (de) 2016-01-22 2017-01-11 Entlüftungseinrichtung für eine pumpe in einem behälter

Publications (2)

Publication Number Publication Date
EP3405677A1 EP3405677A1 (de) 2018-11-28
EP3405677B1 true EP3405677B1 (de) 2020-01-08

Family

ID=57851056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17700799.4A Active EP3405677B1 (de) 2016-01-22 2017-01-11 Entlüftungseinrichtung für eine pumpe in einem behälter

Country Status (7)

Country Link
EP (1) EP3405677B1 (hu)
CN (1) CN108474381B (hu)
DE (1) DE102016200910A1 (hu)
DK (1) DK3405677T3 (hu)
HU (1) HUE048578T2 (hu)
PL (1) PL3405677T3 (hu)
WO (1) WO2017125297A1 (hu)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016225921A1 (de) * 2016-12-21 2018-06-21 KSB SE & Co. KGaA Abwasserhebeanlage mit Schneidwerk
DE102018210207B4 (de) * 2018-06-22 2022-03-10 E.G.O. Elektro-Gerätebau GmbH Wasserführendes Haushaltsgerät mit einer Impellerpumpe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003014250A (ja) * 2001-06-27 2003-01-15 Matsushita Electric Ind Co Ltd 水冷式空気調和装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850984A (en) * 1956-02-13 1958-09-09 Edwards Vapor expelling pump
DE2228305A1 (de) * 1972-06-09 1973-12-20 Siemens Ag Tauchpumpe
DE2913970A1 (de) 1979-04-04 1980-10-23 Hubert Combe Steuerung fuer eine abwasser- und faekalienhebeanlage
DE2913967A1 (de) 1979-04-04 1980-10-23 Hubert Combe Behaelter, insbesondere sammelbehaelter fuer abwasserhebeanlagen
DE29522235U1 (de) * 1995-02-02 2001-01-11 Bsh Bosch Siemens Hausgeraete Flügelrad-Kondensatpumpe für einen Haushalt-Wäschetrockner
DE19913530A1 (de) 1999-03-25 2000-09-28 Ksb Ag Niveauabhängige Steuerung von Pumpen
JP2006274929A (ja) * 2005-03-29 2006-10-12 Kurita Water Ind Ltd 液体用ポンプ
DE102007008692A1 (de) 2007-02-20 2008-08-21 Ksb Aktiengesellschaft Niveauabhängige Steuerung von Pumpen
DE102008016476A1 (de) * 2008-03-31 2009-10-01 BSH Bosch und Siemens Hausgeräte GmbH Hausgerät mit einer Pumpe zur Förderung eines Mediums
CN203961006U (zh) * 2014-06-18 2014-11-26 盛云科技有限公司 污水提升装置
CN204645238U (zh) * 2015-04-01 2015-09-16 江苏金环环保设备有限公司 污水密闭收集提升装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003014250A (ja) * 2001-06-27 2003-01-15 Matsushita Electric Ind Co Ltd 水冷式空気調和装置

Also Published As

Publication number Publication date
EP3405677A1 (de) 2018-11-28
DE102016200910A1 (de) 2017-07-27
CN108474381B (zh) 2020-02-18
CN108474381A (zh) 2018-08-31
WO2017125297A1 (de) 2017-07-27
HUE048578T2 (hu) 2020-07-28
PL3405677T3 (pl) 2020-06-29
DK3405677T3 (da) 2020-03-16

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