EP0664398A1 - Pompe centrifuge avec clapet de non-retour - Google Patents

Pompe centrifuge avec clapet de non-retour Download PDF

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Publication number
EP0664398A1
EP0664398A1 EP95100590A EP95100590A EP0664398A1 EP 0664398 A1 EP0664398 A1 EP 0664398A1 EP 95100590 A EP95100590 A EP 95100590A EP 95100590 A EP95100590 A EP 95100590A EP 0664398 A1 EP0664398 A1 EP 0664398A1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
pump according
pump
stage
membrane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95100590A
Other languages
German (de)
English (en)
Other versions
EP0664398B1 (fr
Inventor
Manfred Neuhaus-Melsheimer
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.)
Wilo GmbH
Original Assignee
Wilo GmbH
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 Wilo GmbH filed Critical Wilo GmbH
Publication of EP0664398A1 publication Critical patent/EP0664398A1/fr
Application granted granted Critical
Publication of EP0664398B1 publication Critical patent/EP0664398B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • F04D15/0083—Protection against sudden pressure change, e.g. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • F04D1/066—Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together

Definitions

  • the invention relates to a centrifugal pump, in particular a multi-stage inline pump with bearings that support the impeller shaft and with a valve that prevents the backflow, the conveying medium emerging from the last stage being pressed into an annular space surrounding the stage (s), from which it flows to the outlet.
  • the object of the invention is to improve a pump of the type mentioned in such a way that, with a simple construction, small construction and simple assembly, only low flow speeds occur within the valve, so that low losses and noises occur.
  • the return valve can be arranged in the flow direction behind the pump, in particular behind the last pump stage and close to the bearing and / or the shaft seal, which faces away from the pump suction and pressure connection.
  • the reflux valve be arranged in the flow direction behind the pump, in particular behind the last pump stage and near or in the annulus outlet, in particular near the first pump stage.
  • Such a diaphragm valve does not require an additional housing and, despite the small external dimensions of the overall pump, can be of relatively oversized design, as a result of which low flow velocities and thus a low resistance arise, so that flow losses and noises remain very low.
  • the reflux valve surrounds a chamber with a ring membrane into which the pump in particular conveys the last pump stage. It is also advantageously proposed that the support surface for the ring membrane is formed by a support part with flow openings lying inside the ring membrane and conically shaped on the outside.
  • a particularly simple and safe construction is provided when the support part forming the support surfaces is attached to the component carrying the shaft seal. A reduction in the number of components is achieved if the support part forming the support surfaces is integral with the component carrying the shaft seal.
  • the support part forming the support surfaces is a deep-drawn sheet metal part or a cast part.
  • the annular membrane simultaneously forms the pump housing seal between the cylinder (housing jacket) surrounding the annular space and the housing part carrying the shaft sealing end.
  • the ring membrane thus has a double function.
  • the conical ring membrane be fastened on the side facing away from the suction and pressure nozzle and movable with the other side, so that the ring membrane can open towards the annular space.
  • a manually operated shut-off valve in particular a flap valve, is arranged in the suction and pressure ports. This means that the pump hydraulics with the integrated backflow preventer can be completely closed for inspection, so that assembly or disassembly and repair are made considerably easier.
  • the flaps are tight when the locking piece, in particular the flap, is surrounded by a sealing sleeve made of flexible material, which at least partially lines the connector.
  • the sealing sleeve be led outwards over the sealing surface of the connecting flange, so that the sealing material serves both to seal the flap and the connection.
  • the exemplary embodiment according to FIGS. 1 and 2 has a package of pump stages 1 which are connected in series and whose impellers 2 are seated on an impeller shaft 3 which is supported by a bearing 4.
  • the bearing 4 close to the suction nozzle 6 and pressure nozzle 7 is located approximately in the area of the first pump stage, and the shaft seal 5 removed from the suction and pressure nozzle is fastened in the area of the rear housing part 8, which is also called "pump lantern".
  • the last pump stage delivers into an annular chamber 9, which is surrounded by a support part 10 in an annular manner and through which the impeller shaft 3 runs coaxially.
  • the support part 10 is conically shaped, and closer to the supports 6, 7 it has a smaller diameter than in the area further away.
  • the support member 10 has numerous flow openings 11, and on its outside there is a correspondingly conically shaped flexible membrane 12 when the pump is not delivering. This membrane is lifted outwards from the support part 10 when the pump is pumping, so that the pumped medium can enter an annular space 13 which coaxially surrounds all pump stages on the outside.
  • the outer surface of the annular space 13 is formed by a cylindrical housing jacket 14, which can consist of a thin-walled tube.
  • the pumped liquid flows from the annular space 13 to the pressure port 7, which, like the suction port 6, is formed by a connection housing 15.
  • Suction nozzle 6 and pressure nozzle 7 are aligned with each other in the connection housing, so that the multi-stage centrifugal pump is an inline pump.
  • the annular membrane 12 With its outer annular end, the annular membrane 12 simultaneously forms the pump housing seal between the cylindrical housing jacket 14 surrounding the annular space 13 and the rear housing part 8.
  • the component or support part 10 forming the support surface is embodied in one piece with the housing part 8 in the exemplary embodiment according to FIGS. 1 and 2 and can be cast together with this from metal.
  • the support part 10 consists of a deep-drawn sheet metal part which is mounted between the last pump stage and the housing part 8.
  • a rotatable flap 16, 17 is mounted in the suction port 6 and in the pressure port 7, a rotatable flap 16, 17 is mounted.
  • the rotary flap can be actuated via a shaft 18, 19 by a hand lever 20 or 21.
  • the inside of the respective nozzle 6, 7 is lined in the area of the flap 16, 17 by a sealing sleeve 22, 23 which is correspondingly cylindrical.
  • the outer end of the two sleeves 22, 23 extends so far outward over the sealing surface of the flange of each connecting piece that the sleeve forms an annular sealing surface 24, 25 there.
  • the last pump stage in particular forms the support surface for the ring membrane, so that the support part 10 is formed by this pump stage.
  • the annular membrane is arranged at the end of the annular space which is close to the suction and pressure nozzle 6, 7.
  • an intermediate part (flange part) 28 to which the housing part 8 and the housing part 27 are screwed on opposite sides.
  • the flange part 28 forms with its support part 10 on the inside a coaxial conical support surface for the ring membrane 12, the ring membrane resting against the support part 10 in the closed state.
EP95100590A 1994-01-21 1995-01-18 Pompe centrifuge avec clapet de non-retour Expired - Lifetime EP0664398B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4401658 1994-01-21
DE4401658A DE4401658A1 (de) 1994-01-21 1994-01-21 Kreiselpumpe mit den Rückfluß verhinderndem Ventil

Publications (2)

Publication Number Publication Date
EP0664398A1 true EP0664398A1 (fr) 1995-07-26
EP0664398B1 EP0664398B1 (fr) 1998-07-22

Family

ID=6508360

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95100590A Expired - Lifetime EP0664398B1 (fr) 1994-01-21 1995-01-18 Pompe centrifuge avec clapet de non-retour

Country Status (3)

Country Link
EP (1) EP0664398B1 (fr)
DE (2) DE4401658A1 (fr)
ES (1) ES2119237T3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2776342A1 (fr) * 1998-03-18 1999-09-24 Sarl Cg Promo Star Pompe centrifuge a amorcage automatique
EP1431584A2 (fr) * 2002-12-18 2004-06-23 Bogemar, S.L. Pompe électrique à plusieurs étages
EP2112380A1 (fr) 2008-04-21 2009-10-28 DP Industries B.V. Pompe centrifuge en plusieurs étages en construction en ligne
EP2916008A1 (fr) * 2014-03-07 2015-09-09 CALPEDA S.p.A. Pompe électrique améliorée particulièrement adaptée au pompage de liquides contenant des impuretés solides
CN106321448A (zh) * 2016-09-29 2017-01-11 周宁县善长祥农业机械研发有限公司 多级水泵及其使用方法
CN106545496A (zh) * 2016-09-29 2017-03-29 周宁县善长祥农业机械研发有限公司 卧吸式多级管道泵
WO2023151114A1 (fr) * 2022-02-10 2023-08-17 浙江水泵总厂有限公司 Structure de corps de pompe et pompe centrifuge la comprenant

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19803162A1 (de) * 1998-01-28 1999-07-29 Wilo Gmbh Kreiselmotorpumpe mit Absperrklappe
DE19851343A1 (de) * 1998-11-06 2000-05-11 Wilo Gmbh Kreiselpumpe mit Absperrklappe
WO2014171809A2 (fr) * 2013-04-19 2014-10-23 Bombas Internacionales Mexicanas, S.A De C.V. Pompe centrifuge verticale, en ligne, multi-étapes
CN106438377B (zh) * 2016-09-29 2018-11-27 周宁县善长祥农业机械研发有限公司 立式多级双阀离心泵及其使用方法
CN112253471A (zh) * 2020-10-26 2021-01-22 长沙中联泵业股份有限公司 一种高温高压多级泵

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1066594A (en) * 1963-04-19 1967-04-26 Pomorska Odlewnia I Emaliernia Submersible pumps with non-return valves
FR2105910A5 (fr) * 1970-09-16 1972-04-28 Worthington Corp
US4244675A (en) * 1979-04-30 1981-01-13 Worthington Pump, Inc. Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies
US4565214A (en) * 1984-06-04 1986-01-21 Dover Corporation Flapper check valve assembly
WO1986004399A1 (fr) * 1985-01-18 1986-07-31 Christopher Erik Andren Soupapes unidirectionnelles automatiques pour fluides
DE8612405U1 (de) * 1986-05-05 1986-07-31 Guss- Und Armaturwerk Kaiserslautern Nachf. Karl Billand, 6750 Kaiserslautern Vorrichtung zur Verbindung der Druckleitung einer Pumpe in einer Abwasser-Hebeanlage mit einer pumpenseitigen Rohrleitung
DE3729673A1 (de) * 1987-09-04 1989-03-23 Grundfos Int Mehrstufige kreiselpumpe
EP0360697A1 (fr) * 1988-09-23 1990-03-28 Olaer Industries Installation de pompage, en particulier pour irrigation
US5201633A (en) * 1990-04-24 1993-04-13 Pompes Salmson Vertical centrifugal hydraulic pump assembly
DE9310091U1 (de) * 1993-07-07 1993-09-23 Hartlage Gmbh & Co Kg J Vertikale kreiselpumpe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649049A (en) * 1950-05-04 1953-08-18 Mono Products Inc Fluid-shielded dynamoelectric device for immersed pumps and the like
DE1824921U (de) * 1960-11-23 1961-01-12 Ferch & Nabben Vorrichtung zum verhindern der ruecksaugung von fluessigkeiten in rohrleitungen.
DE8334283U1 (de) * 1983-11-30 1984-03-01 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Rueckschlagventil

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1066594A (en) * 1963-04-19 1967-04-26 Pomorska Odlewnia I Emaliernia Submersible pumps with non-return valves
FR2105910A5 (fr) * 1970-09-16 1972-04-28 Worthington Corp
US4244675A (en) * 1979-04-30 1981-01-13 Worthington Pump, Inc. Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies
US4565214A (en) * 1984-06-04 1986-01-21 Dover Corporation Flapper check valve assembly
WO1986004399A1 (fr) * 1985-01-18 1986-07-31 Christopher Erik Andren Soupapes unidirectionnelles automatiques pour fluides
DE8612405U1 (de) * 1986-05-05 1986-07-31 Guss- Und Armaturwerk Kaiserslautern Nachf. Karl Billand, 6750 Kaiserslautern Vorrichtung zur Verbindung der Druckleitung einer Pumpe in einer Abwasser-Hebeanlage mit einer pumpenseitigen Rohrleitung
DE3729673A1 (de) * 1987-09-04 1989-03-23 Grundfos Int Mehrstufige kreiselpumpe
EP0360697A1 (fr) * 1988-09-23 1990-03-28 Olaer Industries Installation de pompage, en particulier pour irrigation
US5201633A (en) * 1990-04-24 1993-04-13 Pompes Salmson Vertical centrifugal hydraulic pump assembly
DE9310091U1 (de) * 1993-07-07 1993-09-23 Hartlage Gmbh & Co Kg J Vertikale kreiselpumpe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2776342A1 (fr) * 1998-03-18 1999-09-24 Sarl Cg Promo Star Pompe centrifuge a amorcage automatique
EP1431584A2 (fr) * 2002-12-18 2004-06-23 Bogemar, S.L. Pompe électrique à plusieurs étages
EP1431584A3 (fr) * 2002-12-18 2005-07-27 Bogemar, S.L. Pompe électrique à plusieurs étages
EP2112380A1 (fr) 2008-04-21 2009-10-28 DP Industries B.V. Pompe centrifuge en plusieurs étages en construction en ligne
EP2916008A1 (fr) * 2014-03-07 2015-09-09 CALPEDA S.p.A. Pompe électrique améliorée particulièrement adaptée au pompage de liquides contenant des impuretés solides
CN106321448A (zh) * 2016-09-29 2017-01-11 周宁县善长祥农业机械研发有限公司 多级水泵及其使用方法
CN106545496A (zh) * 2016-09-29 2017-03-29 周宁县善长祥农业机械研发有限公司 卧吸式多级管道泵
WO2023151114A1 (fr) * 2022-02-10 2023-08-17 浙江水泵总厂有限公司 Structure de corps de pompe et pompe centrifuge la comprenant

Also Published As

Publication number Publication date
ES2119237T3 (es) 1998-10-01
DE59502855D1 (de) 1998-08-27
DE4401658A1 (de) 1995-07-27
EP0664398B1 (fr) 1998-07-22

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