EP1041595A3 - Centrifugal pump unit - Google Patents

Centrifugal pump unit Download PDF

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Publication number
EP1041595A3
EP1041595A3 EP00106498A EP00106498A EP1041595A3 EP 1041595 A3 EP1041595 A3 EP 1041595A3 EP 00106498 A EP00106498 A EP 00106498A EP 00106498 A EP00106498 A EP 00106498A EP 1041595 A3 EP1041595 A3 EP 1041595A3
Authority
EP
European Patent Office
Prior art keywords
terminal box
housing
switching device
centrifugal pump
magnet
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
EP00106498A
Other languages
German (de)
French (fr)
Other versions
EP1041595A2 (en
EP1041595B1 (en
EP1041595B2 (en
Inventor
Niels Due Jensen
Carsten Nörgaard
Jörgen Schmidt
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.)
Grundfos AS
Original Assignee
Grundfos AS
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7903058&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1041595(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Grundfos AS filed Critical Grundfos AS
Publication of EP1041595A2 publication Critical patent/EP1041595A2/en
Publication of EP1041595A3 publication Critical patent/EP1041595A3/en
Publication of EP1041595B1 publication Critical patent/EP1041595B1/en
Application granted granted Critical
Publication of EP1041595B2 publication Critical patent/EP1041595B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/40—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane
    • H01H35/405—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane the switch being of the reed switch type
    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • 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
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0227—Lack of liquid level being detected using a flow transducer

Abstract

Das Kreiselpumpenaggregat weist ein innerhalb des Pumpengehäuses (6) im Strömungsweg des Förderfluids angeordneten Strömungswächter (10) auf, der im wesentlichen aus einer elektromagnetischen Schaltvorrichtung (14) und einem zweiarmigen, schwenkbar gelagerten Hebel (16) besteht, dessen einer Arm (18) in den Strömungsweg ragt und dessen anderer Arm (19) einen Magneten (20) trägt, der mit der Schaltvorrichtung (14) in berührungsfreier Wirkverbindung steht. Die Schaltvorrichtung (14) ist innerhalb eines am Aggregatgehäuse angebrachten Klemmenkastens (11) angeordnet. Der Hebel (16) sitzt innerhalb eines patronenartig in das Pumpengehäuse (6) eingegliederten und nach außen hermetisch abgeschlossenen Wächtergehäuses (21), das so zum Klemmenkasten (11) benachbart angeordnet ist, daß es lediglich in magnetischer Wirkverbindung steht, so daß der im Klemmenkasten (11) befindliche Reedkontakt (14) von dem im Wächtergehäuse (21) befindlichen Magneten (20) gesteuert wird. Auf diese Weise kann ein üblicher Klemmenkasten (11) eingesetzt werden, der gegenüber dem Förderstrom nicht gesondert abgedichtet werden muß.

Figure 00000001
The centrifugal pump unit has a flow monitor (10) arranged inside the pump housing (6) in the flow path of the conveying fluid, which essentially consists of an electromagnetic switching device (14) and a two-armed, pivotably mounted lever (16), one arm (18) of which protrudes the flow path and the other arm (19) carries a magnet (20) which is in a non-contact operative connection with the switching device (14). The switching device (14) is arranged within a terminal box (11) attached to the unit housing. The lever (16) sits inside a cartridge-like in the pump housing (6) and hermetically sealed to the outside guard housing (21), which is arranged adjacent to the terminal box (11) so that it is only in magnetic operative connection, so that in the terminal box (11) located reed contact (14) is controlled by the magnet (20) located in the guard housing (21). In this way, a conventional terminal box (11) can be used, which does not have to be sealed separately from the flow.
Figure 00000001
EP00106498A 1999-03-31 2000-03-25 Centrifugal pump unit Expired - Lifetime EP1041595B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914581A DE19914581A1 (en) 1999-03-31 1999-03-31 Centrifugal pump unit
DE19914581 1999-03-31

Publications (4)

Publication Number Publication Date
EP1041595A2 EP1041595A2 (en) 2000-10-04
EP1041595A3 true EP1041595A3 (en) 2002-02-13
EP1041595B1 EP1041595B1 (en) 2004-10-13
EP1041595B2 EP1041595B2 (en) 2011-08-31

Family

ID=7903058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106498A Expired - Lifetime EP1041595B2 (en) 1999-03-31 2000-03-25 Centrifugal pump unit

Country Status (7)

Country Link
US (1) US6273684B1 (en)
EP (1) EP1041595B2 (en)
CN (1) CN1133012C (en)
AR (1) AR022941A1 (en)
DE (2) DE19914581A1 (en)
HK (1) HK1031414A1 (en)
TW (1) TW440656B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10053248A1 (en) * 2000-10-26 2002-05-08 Kaercher Gmbh & Co Alfred High-pressure cleaner
DE10064708A1 (en) * 2000-12-22 2002-07-11 Grundfos As Water works
DE102004048557A1 (en) * 2004-10-04 2006-04-06 Aweco Appliance Systems Gmbh & Co. Kg liquid pump
WO2008027068A2 (en) * 2006-08-25 2008-03-06 Pentair Pump Group, Inc. Fluid system with pump activation device
US8152458B2 (en) * 2009-04-28 2012-04-10 Mp Pumps, Inc. Centrifugal pump with improved drive shaft and heat exchanger
EP2639943B1 (en) * 2012-03-15 2015-02-25 Grundfos Holding A/S Electric motor
PL2808547T3 (en) * 2013-05-31 2017-01-31 Grundfos Holding As Actuation device for a pump assembly
US10385859B2 (en) 2013-12-10 2019-08-20 Franklin Electric Company, Inc. In-line pressure boosting system and method
DE102015119832A1 (en) 2015-11-17 2017-05-18 Xylem Ip Management Sàrl Feed pump for pressure increase in a line and method for operating a feed pump

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992598A (en) * 1974-12-04 1976-11-16 Afton Incorporated Airflow velocity switch
US4085336A (en) * 1976-08-09 1978-04-18 Paul F. Walters Liquid flow activated switch
US4791254A (en) * 1987-12-09 1988-12-13 Hydrolevel Company Flow switch
GB2238664A (en) * 1989-12-02 1991-06-05 Powered Showers Plc Flow switch assembly

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH499018A (en) * 1968-09-03 1970-11-15 Troesch Hans A Dr Ing Circulation pump for heating systems
US3819297A (en) * 1972-09-11 1974-06-25 Gen Gas Light Co Centrifugal pump assembly
GB1545447A (en) † 1977-11-05 1979-05-10 Pektron Ltd Arrangement for dispensing liquids
US4213745A (en) * 1978-09-11 1980-07-22 Roberts Samuel A Pump for central heating system
US4499347A (en) † 1982-01-25 1985-02-12 Richards Gary H Fluid-flow-control-switch valve
DE3210762A1 (en) * 1982-03-24 1983-10-13 Grundfos A/S, 8850 Bjerringbro PUMP UNIT FOR HEATING AND WATER SYSTEMS
DE3220448C1 (en) * 1982-05-29 1983-08-11 Grundfos A/S, 8850 Bjerringbro Pump unit for heating and domestic water systems
GB8506527D0 (en) † 1985-03-13 1985-04-17 Brightplan Ltd Fluid supply device
DE3701562C2 (en) * 1986-03-12 1996-02-08 Wilo Gmbh Centrifugal pump with canned motor
JPH081537B2 (en) 1986-05-31 1996-01-10 大日本印刷株式会社 Card and its information reading method
GB8616106D0 (en) † 1986-07-02 1986-08-06 Pektron Ltd Liquid dispensing arrangement
US4818177A (en) * 1986-12-10 1989-04-04 Dresser Industries, Inc. Centrifugal pump with integral suction valve
US4924069A (en) * 1987-11-19 1990-05-08 Teledyne Industries, Inc. Hot water supply for tubs
JPH03175195A (en) * 1989-09-26 1991-07-30 Ebara Corp Submerged pump
GB2247920B (en) † 1990-08-28 1994-07-27 Whitbread And Company Public L A pump controller
DE4201100A1 (en) * 1992-01-17 1993-07-22 Klein Schanzlin & Becker Ag DEVICE FOR CONTROLLING THE FLOW RATE OF A CENTRIFUGAL PUMP IN A CLOSED PIPE NETWORK
US5183983A (en) * 1992-03-20 1993-02-02 Dwyer Instruments, Inc. Flow switch assembly for fluid flow monitoring
US5624245A (en) * 1994-10-26 1997-04-29 Mp Pumps, Inc. Centrufugal pump with thermally isolated and dynamically air cooled shaft seal assembly
DE29503806U1 (en) * 1995-03-06 1996-07-04 Sihi Gmbh & Co Kg Pump for conveying hot media
US5737041A (en) * 1995-07-31 1998-04-07 Image Quest Technologies, Inc. TFT, method of making and matrix displays incorporating the TFT
JP3144326B2 (en) * 1996-12-17 2001-03-12 松下電器産業株式会社 Electric water heater
JPH1116491A (en) * 1997-06-26 1999-01-22 Dainippon Printing Co Ltd Forming method for thick-film pattern for use in plasma display panel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992598A (en) * 1974-12-04 1976-11-16 Afton Incorporated Airflow velocity switch
US4085336A (en) * 1976-08-09 1978-04-18 Paul F. Walters Liquid flow activated switch
US4791254A (en) * 1987-12-09 1988-12-13 Hydrolevel Company Flow switch
GB2238664A (en) * 1989-12-02 1991-06-05 Powered Showers Plc Flow switch assembly

Also Published As

Publication number Publication date
CN1133012C (en) 2003-12-31
DE19914581A1 (en) 2000-10-12
EP1041595A2 (en) 2000-10-04
DE50008180D1 (en) 2004-11-18
TW440656B (en) 2001-06-16
HK1031414A1 (en) 2001-06-15
EP1041595B1 (en) 2004-10-13
EP1041595B2 (en) 2011-08-31
CN1270280A (en) 2000-10-18
US6273684B1 (en) 2001-08-14
AR022941A1 (en) 2002-09-04

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