EP3405681B1 - Dispositif de purge d'air pour une pompe dans un résrevoir - Google Patents

Dispositif de purge d'air pour une pompe dans un résrevoir Download PDF

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Publication number
EP3405681B1
EP3405681B1 EP17700249.0A EP17700249A EP3405681B1 EP 3405681 B1 EP3405681 B1 EP 3405681B1 EP 17700249 A EP17700249 A EP 17700249A EP 3405681 B1 EP3405681 B1 EP 3405681B1
Authority
EP
European Patent Office
Prior art keywords
container
component
line element
gap
centrifugal pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17700249.0A
Other languages
German (de)
English (en)
Other versions
EP3405681A1 (fr
Inventor
Axel Schunk
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Publication of EP3405681A1 publication Critical patent/EP3405681A1/fr
Application granted granted Critical
Publication of EP3405681B1 publication Critical patent/EP3405681B1/fr
Active legal-status Critical Current
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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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/122—Pipe-line systems for waste water in building
    • E03C1/1222—Arrangements of devices in domestic waste water pipe-line systems
    • E03C1/1227—Arrangements of devices in domestic waste water pipe-line systems of pumps for facilitating drawing off
    • 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
    • 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
    • F04D29/4293—Details of fluid inlet or outlet
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of 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

Definitions

  • the invention relates to a system with a container for the intermediate storage of waste water and an arrangement which has a centrifugal pump which is arranged in the container, the centrifugal pump conveying a medium into a line element forming a pressure port.
  • 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 motor 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 wastewater lifting plant with a container in which wastewater collects. An opening is provided on the top of the container, 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 leakage water flow that occurs 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 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.
  • DE 29 13 967 A1 describes a sewage lifting unit in which a bore is arranged in a main chamber cover plate, to which a connection piece is connected, which is connected to a pump ventilation hose.
  • the pump ventilation hose opens into a bend screwed onto the pressure flange of the centrifugal pump.
  • 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 object of the invention is to provide a system which has a reliable mode of operation and the highest possible efficiency, even in the promotion of solid media, especially fiber media.
  • the system should be characterized by the simplest possible construction and should not be susceptible to faults. Furthermore, the system should be as inexpensive to manufacture as possible and should only have the lowest possible operating costs.
  • an annular gap for venting the centrifugal pump is arranged between the line element of the system and the passage of the flange shield (28).
  • no additional ventilation holes are required for venting the centrifugal pump in the construction according to the invention. It proves to be particularly advantageous if the 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.
  • the line element and the component are arranged at a distance from one another. For this, the transition from the line element and the component is used, so that a defined annular gap is created.
  • 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.
  • the 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 the line element and / or component.
  • the annular gap has one or more notches. The notches are created by making recesses in the line element and / or the component immediately adjacent to it.
  • the recesses in the line element and / or the component directly adjacent thereto can have different shapes, for example angular, round, half, triangular and / or rectangular.
  • the line element is designed as a pressure port into which the centrifugal pump delivers the medium.
  • the component is designed as a passage of the flange end shield, which is used as a pressure line.
  • the transition between the two parts is a blunt joint of two cylindrical pipe sections and is located inside the container. This creates an annular gap which can be used as a vent and which at the same time creates a flat flow in the manner of a fluid carpet.
  • the gap is oriented such that a leakage flow flows from the gap into an element which is arranged in the container. This can be, for example, the float of a level control.
  • the liquid carpet is used to prevent or remove deposits on the level measuring device.
  • the arrangement is preferably designed as a centrifugal pump unit that 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.
  • 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 designed as a level measuring device for detecting the fill level.
  • a level measuring device for detecting the fill level.
  • 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 motor 13 and a centrifugal pump 10 with a first housing part 11 designed as a spiral housing and a further housing part 12 designed as a pressure cover.
  • 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.
  • the arrangement has a further vent 30, which is provided in addition to the annular gap.
  • the vent 30 is arranged above or at the level of an impeller 24 in the first housing part 11.
  • the vent 30 is in the exemplary embodiment designed as an aligned arrangement of openings which are introduced in a region 25 of the first housing part 11 and in a region of the further housing part 12 which is designed as a pressure cover fitting.
  • Gases in the pump escape through the vent 30 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.
  • 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 on.
  • 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 an angled line element 14 into a pipeline 15.
  • Figure 5 shows an axial section through the container 1.
  • the first housing part 11 which is designed as a spiral housing, is connected to the line element 14, which is designed as a pressure connection.
  • the pressure port is cast onto the volute casing.
  • a component 27 is connected downstream of the line element 14.
  • the component 27 is part of a flange end plate 28.
  • the component 27 is designed as a passage, which is used as a pressure line.
  • Figure 6 shows an enlarged section of area B.
  • Figure 5 A gap 29 is formed between the line element 14 and the component 27.
  • the transition between the line element 14 and the component 27 is designed in the manner of a butt joint.
  • the line element 14 and the component 27 are arranged at a distance from one another. They are preferably at an axial and / or radial distance from one another. In a favorable embodiment, 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.
  • the line element 14 and the component 27 have hollow cylindrical tube sections which form an annular gap due to an axial and / or radial spacing from one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (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)

Claims (14)

  1. Installation comprenant un récipient (1) pour le stockage temporaire d'eaux usées, un agencement (9) qui présente une pompe centrifuge (10) qui est disposée dans le récipient (1) et un composant (27) qui fait partie d'un flasque de palier (28), le composant étant réalisé sous forme de passage qui est utilisé en tant que conduite de pression, et la pompe centrifuge (10) refoulant un fluide dans un élément de conduite (14) formant une tubulure sous pression et dans le passage s'y raccordant,
    caractérisée en ce
    qu'une fente de forme annulaire (29) pour le désaérage de la pompe centrifuge (10) est formée entre l'élément de conduite (14) et le passage.
  2. Installation selon la revendication 1, caractérisée en ce que l'élément de conduite (14) et le composant (27) forment la fente (29) par un espacement axial et/ou radial l'un de l'autre.
  3. Installation selon la revendication 2, caractérisée en ce que la distance axiale et/ou radiale entre l'élément de conduite (14) et le composant (27) est inférieure à 2 mm, de préférence inférieure à 1 mm, en particulier inférieure à 0,5 mm.
  4. Installation selon la revendication 2 ou 3, caractérisée en ce que la distance axiale et/ou radiale entre l'élément de conduite (14) et le composant (27) est supérieure à 0,01 mm, de préférence supérieure à 0,05 mm, en particulier supérieure à 0,08 mm.
  5. Installation selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'élément de conduite (14) et/ou le composant (27) présentent une surface non plane limitant la fente (29) .
  6. Installation selon l'une quelconque de la revendication 5, caractérisée en ce que des évidements sont réalisés au niveau de l'élément de conduite (14) et/ou au niveau du composant (27).
  7. Installation selon l'une quelconque des revendications 5 et 6, caractérisée en ce que la fente (29) présente des entailles.
  8. Installation selon l'une quelconque des revendications 1 à 7, caractérisée en ce que l'élément de conduite (14) et/ou le composant (27) présentent des zones tubulaires.
  9. Installation selon l'une quelconque des revendications 1 à 8, caractérisée en ce que la fente (29) est orientée de telle sorte qu'un flux de fuite provenant de la fente (29) afflue sur un élément qui est disposé dans le récipient (1).
  10. Installation selon l'une quelconque des revendications 1 à 9, caractérisée en ce que la fente (29) est orientée de telle sorte qu'un flux de fuite provenant de la fente (29) afflue sur un élément d'un dispositif de mesure de niveau de remplissage.
  11. Installation selon l'une quelconque des revendications 1 à 10, caractérisée en ce que le désaérage agit dans la direction radiale.
  12. Installation selon l'une quelconque des revendications 1 à 11, caractérisée en ce que le moteur (13) est disposé au moins en partie, de préférence complètement, à l'extérieur du récipient (1).
  13. Installation selon l'une quelconque des revendications 1 à 12, caractérisée en ce que le moteur (13) est connecté au rotor (24) de la pompe centrifuge (10) par le biais d'un arbre vertical (22) .
  14. Installation selon l'une quelconque des revendications 1 à 13, caractérisée en ce que le récipient (1) présente un logement (8) pour l'agencement (9).
EP17700249.0A 2016-01-22 2017-01-11 Dispositif de purge d'air pour une pompe dans un résrevoir Active EP3405681B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016200909.5A DE102016200909A1 (de) 2016-01-22 2016-01-22 Entlüftungseinrichtung
PCT/EP2017/050481 WO2017125294A1 (fr) 2016-01-22 2017-01-11 Dispositif de purge

Publications (2)

Publication Number Publication Date
EP3405681A1 EP3405681A1 (fr) 2018-11-28
EP3405681B1 true EP3405681B1 (fr) 2020-04-22

Family

ID=57777656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17700249.0A Active EP3405681B1 (fr) 2016-01-22 2017-01-11 Dispositif de purge d'air pour une pompe dans un résrevoir

Country Status (6)

Country Link
EP (1) EP3405681B1 (fr)
CN (1) CN108700087B (fr)
DE (1) DE102016200909A1 (fr)
DK (1) DK3405681T3 (fr)
HU (1) HUE049734T2 (fr)
WO (1) WO2017125294A1 (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB864620A (en) * 1956-07-27 1961-04-06 Ciba Ltd Apparatus for pumping liquids from storage containers or the like
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
JPS5726296A (en) * 1980-07-25 1982-02-12 Hitachi Ltd Submerged pump
DE19913530A1 (de) 1999-03-25 2000-09-28 Ksb Ag Niveauabhängige Steuerung von Pumpen
JP2003014250A (ja) * 2001-06-27 2003-01-15 Matsushita Electric Ind Co Ltd 水冷式空気調和装置
JP4039661B2 (ja) * 2002-07-16 2008-01-30 自動車電機工業株式会社 ウォッシャポンプ
JP2004100457A (ja) * 2002-09-04 2004-04-02 Koshin:Kk 風呂水用汲み上げポンプ
DE102007008692A1 (de) 2007-02-20 2008-08-21 Ksb Aktiengesellschaft Niveauabhängige Steuerung von Pumpen
JP2011007090A (ja) * 2009-06-25 2011-01-13 Kubota Corp ポンプの排気構造
KR200465102Y1 (ko) * 2011-07-26 2013-02-01 손병천 수중펌프의 토출관에 공기유입장치가 구비된 저수조 자동배수장치
EP2573288B1 (fr) * 2011-09-22 2013-10-16 Grundfos Holding A/S Installation de relèvement d'eaux usées
JP2015169189A (ja) * 2014-03-11 2015-09-28 株式会社荏原製作所 吐出ケーシング及びこれを備えた立型水中ポンプ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DK3405681T3 (da) 2020-07-27
HUE049734T2 (hu) 2020-10-28
DE102016200909A1 (de) 2017-07-27
EP3405681A1 (fr) 2018-11-28
CN108700087B (zh) 2021-02-02
CN108700087A (zh) 2018-10-23
WO2017125294A1 (fr) 2017-07-27

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