US20030118451A1 - Device for monitoring fluid flow in a pump outlet - Google Patents

Device for monitoring fluid flow in a pump outlet Download PDF

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Publication number
US20030118451A1
US20030118451A1 US10/293,358 US29335802A US2003118451A1 US 20030118451 A1 US20030118451 A1 US 20030118451A1 US 29335802 A US29335802 A US 29335802A US 2003118451 A1 US2003118451 A1 US 2003118451A1
Authority
US
United States
Prior art keywords
flow
detecting
monitoring device
pump
cage
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.)
Abandoned
Application number
US10/293,358
Other languages
English (en)
Inventor
Andreas Wikingsson
Stefan Svensson
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.)
ITT Manufacturing Enterprises LLC
Original Assignee
ITT Manufacturing Enterprises LLC
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 ITT Manufacturing Enterprises LLC filed Critical ITT Manufacturing Enterprises LLC
Assigned to ITT MANUFACTURING ENTERPRISES INC. reassignment ITT MANUFACTURING ENTERPRISES INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SVENSSON, STEFAN, WIKINGSSON, ANDREAS
Publication of US20030118451A1 publication Critical patent/US20030118451A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
    • G01P13/0013—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using a solid body which is shifted by the action of the fluid
    • G01P13/002—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using a solid body which is shifted by the action of the fluid with electrical coupling to the indicating devices
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/28—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter

Definitions

  • the invention concerns a device for monitoring the fluid flow in a pump outlet and in dependence thereof, controlling the current supply of an electrically driven pump motor.
  • the invention is especially adapted to be used in connection with so-called submersible pumps, where an electric motor, a hydraulic unit and an intermediate seal device as a compact unit are submersed in the pumped medium, water, and where the latter is used for cooling of the electric motor.
  • Pumps of this type are commonly used at construction sites, in mines etc. and they very often operate during long periods without any supervision. If the pump, for some reason should cease to pump water, because of lack of water, because of the pump inlet being clogged etc., the pump outlet will contain air instead of water. As air has considerably worse cooling abilities as compared to water, there is a risk that the electric motor could be damaged. It is also a waste of energy to let the pump operate dry and in addition the parts in the hydraulic unit might be warn out because of the fact that the water contains abrasive particles that circulate within the pump housing.
  • This invention solves the problem to detect air in the outlet from a pump in a simple and secure way and to disconnect the current supply of the pump in dependence of said information.
  • the invention is characterized by the enclosed claims.
  • FIG. 1 shows a detection device
  • FIG. 2 a tongue element
  • FIG. 4 a part of a submersible pump unit and 4 an electric diagram.
  • a detecting device formed like a body 1 made of a permanent magnetic material and having a higher density than the pumped medium is arranged within a cage 2 located in the outlet from a submersible pump.
  • the cage is provided with meshes wide enough not to obstruct the flow and is also so designed, that the body 1 is allowed to move a distance within the mainly vertically directed pump outlet 3 .
  • the position of the body is then dependent on the flow such, that a flow over a certain intensity brings the body to the upper part of the cage, while a flow below said value allows the body to move towards the lower part of the cage.
  • the body is then allowed to move with a certain play within the cage in order to prevent impurities in the water from disturbing the movement.
  • the cage 2 is attached to a wall in the pump outlet, normally aluminum, and on the opposite side of said wall there is arranged a tongue element 4 .
  • Said element is influenced by the magnetic field emitted by the body 1 , which penetrates the wall in such a way, that the position of the body can be decided, without the need for any lead-through in the wall.
  • the indication of the tongue element is used to control an electric circuit which is arranged to cut the current supply of the electric motor at a suitable time, thus avoiding dry running of the pump.
  • the electric circuit can be provided with a time relay, which initiates restart of the pump after a certain time.
  • the cage 2 is designed to give the best possible freedom of movement for the body 1 .
  • the cage may be designed with a downwards increasing area, thus making it easier for the body 1 to sink when the flow decreases or stops entirely.
  • One advantage with the invention is that the design is very insensitive to pollutants in the pumped medium.
  • the parts that come into contact with the medium can be designed with very big tolerances which decrease the risks for clogging, while the sensitive parts are located in a room sealed from the pumped medium.
  • FIGS. 5 and 6 a devise comprising a body of permanent magnetic material arranged in a rocker, which takes different positions in dependence of the flow in the pump outlet. If the flow has stopped, the rocker takes a vertical position, FIG. 5, while it tilts upwards at a certain flow, FIG. 6. The change of the location of the body is registered by the tongue element at the opposite side of the wall in the same way as previously described.
  • the solution using a rocker is especially useful when it is expected that the pump might take a position lying down, which brings about a more or less horizontally directed pump outlet and consequently gravity force cannot be relied upon.
  • a turning spring connected to the turning axle of the rocker can then be used to secure that the rocker takes its horizontal position when the flow has decreased.
  • other variants can be used where the end positions of the rocker are so located, that only a slight turning movement is allowed. This solution may under certain circumstances be less sensitive to disturbances from outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
  • Measuring Volume Flow (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
US10/293,358 2001-12-20 2002-11-14 Device for monitoring fluid flow in a pump outlet Abandoned US20030118451A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0104317-3 2001-12-20
SE0104317A SE518821C2 (sv) 2001-12-20 2001-12-20 Avkänningsanordning för vätskeflödet i ett pumputlopp avsedd att styra strömtillförseln till den elektriskt drivan pumpmotorn

Publications (1)

Publication Number Publication Date
US20030118451A1 true US20030118451A1 (en) 2003-06-26

Family

ID=20286417

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/293,358 Abandoned US20030118451A1 (en) 2001-12-20 2002-11-14 Device for monitoring fluid flow in a pump outlet

Country Status (6)

Country Link
US (1) US20030118451A1 (fr)
EP (1) EP1324011A3 (fr)
CN (1) CN1427181A (fr)
CA (1) CA2414307A1 (fr)
SE (1) SE518821C2 (fr)
ZA (1) ZA200209108B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7152469B2 (en) 2004-01-13 2006-12-26 Baxter International Inc. Fluid flow sensor, method and system
DE502004006565D1 (de) * 2004-02-11 2008-04-30 Grundfos As Verfahren zur Ermittlung von Fehlern beim Betrieb eines Pumpenaggregates
GB2446370A (en) * 2007-02-07 2008-08-13 Dlp Ltd Shower waste pump and supply control
EP2072829B2 (fr) 2007-12-21 2017-12-20 Grundfos Management A/S Pompe submersible
CN107859629A (zh) * 2017-12-27 2018-03-30 嘉禾福顺机械实业有限公司 一种感应式自动关停自吸泵
IT202100029222A1 (it) * 2021-11-18 2023-05-18 Guarneri Solutions S R L Dispositivo per il controllo e l’attivazione di una pompa per lo spostamento di liquidi

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500759A (en) * 1983-09-28 1985-02-19 Defasselle Craig R Fluid flow switch
US4738395A (en) * 1987-02-17 1988-04-19 Hot Water Equipment Corporation Fluid flow rate detector and system
US4937558A (en) * 1986-04-08 1990-06-26 Societe Nationale Elf Aquitaine (Production) Flow failure detector
US4944190A (en) * 1988-09-19 1990-07-31 Ametek Corporation Flow meter
US5222867A (en) * 1986-08-29 1993-06-29 Walker Sr Frank J Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance
US5819848A (en) * 1996-08-14 1998-10-13 Pro Cav Technology, L.L.C. Flow responsive time delay pump motor cut-off logic
US5927950A (en) * 1996-05-03 1999-07-27 Lapa Services S.R.L. Device for controlling the supply of water (or other liquid) by a pump and for protecting the same in the event of dry running
US6099264A (en) * 1998-08-27 2000-08-08 Itt Manufacturing Enterprises, Inc. Pump controller

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276170B (de) * 1966-10-25 1968-08-29 Honsberg & Co Kg Stroemungswaechter fuer fluessige oder gasfoermige Medien
US3549839A (en) * 1969-02-26 1970-12-22 Brimco Mfg Co Fluid flow monitor
ES431609A1 (es) * 1974-11-04 1976-10-16 Wenderoth Sensor magnetico de flujo de fluidos.
GB8720412D0 (en) * 1987-08-28 1987-10-07 Changestart Ltd Flow detectors
BE1002318A6 (nl) * 1988-07-25 1990-11-27 P D Chemie N V Kontrole-inrichting voor het debiet van een vloeistof en pompinrichting hiermee uitgerust.
US4963857A (en) * 1989-06-26 1990-10-16 Sackett Robert L Translatable dual magnets

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4500759A (en) * 1983-09-28 1985-02-19 Defasselle Craig R Fluid flow switch
US4937558A (en) * 1986-04-08 1990-06-26 Societe Nationale Elf Aquitaine (Production) Flow failure detector
US5222867A (en) * 1986-08-29 1993-06-29 Walker Sr Frank J Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance
US4738395A (en) * 1987-02-17 1988-04-19 Hot Water Equipment Corporation Fluid flow rate detector and system
US4944190A (en) * 1988-09-19 1990-07-31 Ametek Corporation Flow meter
US5927950A (en) * 1996-05-03 1999-07-27 Lapa Services S.R.L. Device for controlling the supply of water (or other liquid) by a pump and for protecting the same in the event of dry running
US5819848A (en) * 1996-08-14 1998-10-13 Pro Cav Technology, L.L.C. Flow responsive time delay pump motor cut-off logic
US6099264A (en) * 1998-08-27 2000-08-08 Itt Manufacturing Enterprises, Inc. Pump controller

Also Published As

Publication number Publication date
EP1324011A2 (fr) 2003-07-02
SE0104317L (sv) 2002-11-26
SE0104317D0 (sv) 2001-12-20
SE518821C2 (sv) 2002-11-26
EP1324011A3 (fr) 2003-11-05
ZA200209108B (en) 2003-05-27
CA2414307A1 (fr) 2003-06-20
CN1427181A (zh) 2003-07-02

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ITT MANUFACTURING ENTERPRISES INC., DELAWARE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WIKINGSSON, ANDREAS;SVENSSON, STEFAN;REEL/FRAME:013490/0429

Effective date: 20021101

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION