EP0843100A1 - Pump with static device for switching it on - Google Patents

Pump with static device for switching it on Download PDF

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Publication number
EP0843100A1
EP0843100A1 EP97402458A EP97402458A EP0843100A1 EP 0843100 A1 EP0843100 A1 EP 0843100A1 EP 97402458 A EP97402458 A EP 97402458A EP 97402458 A EP97402458 A EP 97402458A EP 0843100 A1 EP0843100 A1 EP 0843100A1
Authority
EP
European Patent Office
Prior art keywords
pump
sensor
detector
liquid
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.)
Granted
Application number
EP97402458A
Other languages
German (de)
French (fr)
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EP0843100B1 (en
Inventor
Christian Mabillot
Jacques Berthon
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 SAS
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KSB SAS
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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
    • F04D15/02—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

Definitions

  • the invention overcomes these drawbacks with a less pump bulky, less prone to breaking down and which allows emptying completely the sump.
  • the pump according to the invention has a waterproof casing and vents suction opening at the bottom of the pump. It is characterized by a static liquid presence detector, which is mounted in the manifold discharge at a level lower than that of the mouth of the tubing of discharge and by an on / off circuit of the pump motor controlled by the detector.
  • a pressure sensor an optical sensor emitting a laser beam which will be interrupted when there is presence of liquid putting thus the pump in operation and stopping it when the beam is restored by the presence of air
  • an ultrasonic generator emitting a beam which will be interrupted when water is present, thus putting the pump in operation, it stops when the ultrasound reappear in the presence of air
  • a temperature probe which, in the presence of cold liquid, will start the pump motor.
  • the detector can also be a capacitive sensor activating an oscillator emitting a frequency which will different in the presence of liquid for start-up and in the presence of air for the stop.
  • the detector can also be a piezoelectric sensor generating vibrations which will be damped in the presence of water for setting on the way. When the pump no longer delivers by the presence of air, the sensor will stop the pump. You can also use a flexible membrane which, under static pressure and under pressure from the pump in operation, will deform a membrane, which will activate a pump start switch.
  • the pump shown comprises a casing 1 sealed against inside which a wheel 2 is mounted rotating relative to the axis x, x ' of the pump. Below the wheel 2, the pump has a base on which it is erected with its vertical x, x 'axis. 3 suction outlets open out at the lowest point of the pump.
  • Wheel 2 is driven by an electric motor 4 with electronic control plate 5. Along a side of the motor extends the delivery pipe 6. This tubing is vertical and communicates with the wheel 2.
  • the mouth 7 of the tubing of discharge to the outside is at the highest point of the pump. At one level lower than that of the mouth 7 is mounted in the tubing 6 a detector 8 fixed and static capable of detecting the presence of liquid at its level in the tubing 6. This detector 8 is connected by an on / off circuit 9 to the plate 5 for controlling the motor 4 of the pump.
  • the detector 8 detects the presence of liquid as soon as that it arrives at its level and, via circuit 9 and the circuit board 5, controls the starting of the motor 4 and therefore of the pump. That; ci sucks the liquid through the vents 3, the wheel 2 and the tubing 6 to discharge it by mouth 7, as shown by the arrows in the drawing. As long as there is the water in the sump, this operation continues and it is only when there is more liquid than the detector 8 controls the stopping of the engine 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Keying Circuit Devices (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • External Artificial Organs (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

The pump is contained in a sealed enclosure with breathe holes (3) positioned at the pump base. The pump has a static liquid presence sensor (8) which is mounted in a reverse flow tube (6) at a lower level than that of the tube output (7). The sensor is designed to detect the presence of a liquid at its level. A start/stop circuit (9) for the pump motor (4) is controlled by the sensor. The sensor may be of pressure, optical, ultrasound, temperature, capacitance, piezo-electric, or flexible membrane type.

Description

On connaít un grand nombre de pompes vide cave ayant un système de marche/arrêt mettant en oeuvre des systèmes à flotteur, qui ouvrent ou ferment un interrupteur du circuit de commande de la pompe.We know a large number of vacuum cellar pumps having a on / off system using float systems, which open or close a switch on the pump control circuit.

Des pompes de ce genre ont l'inconvénient d'être d'un grand encombrement, ce qui implique de donner de plus grandes dimensions au puisard qui reçoit la pompe. D'autre part, ces systèmes à flotteur sont sujets à tomber en panne assez facilement par blocage du flotteur. Enfin, le flotteur doit, en la position basse en laquelle il commande l'arrêt de la pompe, flotter dans une quantité de liquide encore suffisante, faute de quoi on ne disposerait pas d'une marge de sécurité suffisante, compte tenu des dépôts et de l'inertie du flotteur, pour être sûr, qu'en cette position la plus basse, le moteur de la pompe est bien arrêté et que celle-ci cesse d'aspirer. La pompe s'arrête alors qu'il reste encore du liquide dans le puisard.Disadvantages of this type are that they are large size, which implies giving larger dimensions to the sump that receives the pump. On the other hand, these float systems are subject to break down quite easily by blocking the float. Finally, the float must, in the low position in which it controls the stopping of the pump, float in a sufficient quantity of liquid, otherwise we would not have not a sufficient safety margin, taking into account deposits and inertia of the float, to be sure, that in this lowest position, the motor of the pump is stopped and it stops sucking. The pump then stops there is still liquid in the sump.

L'invention pallie ces inconvénients par une pompe moins encombrante, moins sujette à tomber en panne et qui permet de vider complètement le puisard.The invention overcomes these drawbacks with a less pump bulky, less prone to breaking down and which allows emptying completely the sump.

La pompe suivant l'invention a une enveloppe étanche et des ouïes d'aspiration débouchant au bas de la pompe. Elle est caractérisée par un détecteur statique de présence de liquide, qui est monté dans la tubulure de refoulement à un niveau inférieur à celui de l'embouchure de la tubulure de refoulement et par un circuit de marche/arrêt du moteur de la pompe commandé par le détecteur.The pump according to the invention has a waterproof casing and vents suction opening at the bottom of the pump. It is characterized by a static liquid presence detector, which is mounted in the manifold discharge at a level lower than that of the mouth of the tubing of discharge and by an on / off circuit of the pump motor controlled by the detector.

Quand de l'eau s'élève dans le puisard dans lequel la pompe est placée, l'eau passe par les ouïes d'écoulement et remonte par la tubulure de refoulement. Dès que l'eau est au niveau du détecteur, celui-ci commande la mise en marche du moteur de la pompe. La pompe aspire l'eau du puisard et la refoule et elle continue à le faire tant qu'il reste de l'eau à aspirer de sorte que l'on peut vider complètement le puisard. Comme détecteur statique, c'est-à-dire n'ayant pas de pièces en mouvement et donc peu sujet à tomber en panne, on peut utiliser un capteur de pression, un capteur optique émettant un faisceau laser qui sera interrompu lorsqu'il y aura présence de liquide mettant ainsi la pompe en fonctionnement et l'arrêtant lorsque le faisceau sera rétabli par la présence d'air, un générateur d'ultrasons émettant un faisceau d'ultrasons qui sera interrompu lorsqu'il y aura présence d'eau en mettant ainsi la pompe en fonctionnement, celle-ci s'arrêtant lorsque les ultrasons réapparaítront en présence d'air, une sonde de température qui, en présence de liquide froid, déclenchera la mise en marche du moteur de la pompe. On peut aussi réaliser le capteur par deux sondes dont une sera une sonde de référence et l'autre fonctionne par différence. Le détecteur peut être aussi un capteur capacitif activant un oscillateur émettant une fréquence qui sera différente en présence de liquide pour la mise en route et en présence d'air pour l'arrêt. Le détecteur peut être aussi un capteur piézo-électrique engendrant des vibrations qui seront amorties en présence d'eau pour la mise en route. Lorsque la pompe ne débite plus par présence d'air, le capteur commandera l'arrêt de la pompe. On peut également utiliser un capteur à membrane souple qui, sous la pression statique et sous la pression de la pompe en fonctionnement, déformera une membrane, laquelle actionnera un interrupteur de mise en route de la pompe.When water rises in the sump in which the pump is placed, the water passes through the outlets and rises through the tubing of repression. As soon as the water is at the level of the detector, the latter controls the starting the pump motor. The pump draws water from the sump and the backflow and it continues to do so as long as there is still water to suck up so that we can completely empty the sump. As a static detector, i.e. having no moving parts and therefore little subject to fall in failure, you can use a pressure sensor, an optical sensor emitting a laser beam which will be interrupted when there is presence of liquid putting thus the pump in operation and stopping it when the beam is restored by the presence of air, an ultrasonic generator emitting a beam which will be interrupted when water is present, thus putting the pump in operation, it stops when the ultrasound reappear in the presence of air, a temperature probe which, in the presence of cold liquid, will start the pump motor. We can also realize the sensor by two probes, one of which will be a reference and the other works by difference. The detector can also be a capacitive sensor activating an oscillator emitting a frequency which will different in the presence of liquid for start-up and in the presence of air for the stop. The detector can also be a piezoelectric sensor generating vibrations which will be damped in the presence of water for setting on the way. When the pump no longer delivers by the presence of air, the sensor will stop the pump. You can also use a flexible membrane which, under static pressure and under pressure from the pump in operation, will deform a membrane, which will activate a pump start switch.

La figure unique du dessin annexé illustre l'invention.The single figure of the accompanying drawing illustrates the invention.

La pompe représentée comporte une enveloppe 1 étanche à l'intérieur de laquelle une roue 2 est montée tournante par rapport à l'axe x,x' de la pompe. En dessous de la roue 2, la pompe comporte un socle sur lequel elle est dressée en ayant son axe x,x' vertical. Des ouïes 3 d'aspiration débouchent à l'endroit le plus bas de la pompe. La roue 2 est entraínée par un moteur 4 électrique à platine 5 électronique de commande. Le long d'un côté du moteur s'étend la tubulure 6 de refoulement. Cette tubulure est verticale et communique avec la roue 2. L'embouchure 7 de la tubulure de refoulement à l'extérieur est au point culminant de la pompe. A un niveau inférieur à celui de l'embouchure 7 est monté dans la tubulure 6 un détecteur 8 fixe et statique apte à détecter la présence de liquide à son niveau dans la tubulure 6. Ce détecteur 8 est relié par un circuit 9 de marche/arrêt à la platine 5 de commande du moteur 4 de la pompe. The pump shown comprises a casing 1 sealed against inside which a wheel 2 is mounted rotating relative to the axis x, x ' of the pump. Below the wheel 2, the pump has a base on which it is erected with its vertical x, x 'axis. 3 suction outlets open out at the lowest point of the pump. Wheel 2 is driven by an electric motor 4 with electronic control plate 5. Along a side of the motor extends the delivery pipe 6. This tubing is vertical and communicates with the wheel 2. The mouth 7 of the tubing of discharge to the outside is at the highest point of the pump. At one level lower than that of the mouth 7 is mounted in the tubing 6 a detector 8 fixed and static capable of detecting the presence of liquid at its level in the tubing 6. This detector 8 is connected by an on / off circuit 9 to the plate 5 for controlling the motor 4 of the pump.

Lorsque de l'eau remonte par les ouïes 3 dans la tubulure 6 alors que la pompe est à l'arrêt, le détecteur 8 détecte la présence de liquide dès que celui-ci arrive à son niveau et, par l'intermédiaire du circuit 9 et de la platine 5, commande la mise en marche du moteur 4 et donc de la pompe. Celle; ci aspire le liquide par les ouïes 3, la roue 2 et la tubulure 6 pour le refouler par l'embouchure 7, comme le montrent les flèches du dessin. Tant qu'il y a de l'eau dans le puisard, cette opération se poursuit et ce n'est que lorsqu'il n'y a plus de liquide que le détecteur 8 commande l'arrêt du moteur 4.When water rises through the vents 3 in the tubing 6 then the pump is stopped, the detector 8 detects the presence of liquid as soon as that it arrives at its level and, via circuit 9 and the circuit board 5, controls the starting of the motor 4 and therefore of the pump. That; ci sucks the liquid through the vents 3, the wheel 2 and the tubing 6 to discharge it by mouth 7, as shown by the arrows in the drawing. As long as there is the water in the sump, this operation continues and it is only when there is more liquid than the detector 8 controls the stopping of the engine 4.

Claims (5)

Pompe à enveloppe étanche et à ouïes (3) d'aspiration débouchant au bas de la pompe, caractérisée par un détecteur (8) statique de présence de liquide, qui est monté dans la tubulure (6) de refoulement à un niveau inférieur à celui de l'embouchure (7) de la tubulure (6) de refoulement et qui est apte à détecter la présence de liquide à son niveau et par un circuit (9) de marche/arrêt du moteur (4) de la pompe commandé par le détecteur (8).Sealed casing pump and suction outlets (3) opening at the bottom of the pump, characterized by a static detector (8) of presence of liquid, which is mounted in the discharge pipe (6) at a lower level than that of the outlet (7) of the delivery pipe (6) and which is able to detect the presence of liquid at its level and by a circuit (9) start / stop of the motor (4) of the pump controlled by the detector (8). Pompe suivant la revendication 1, caractérisée en ce que les ouïes (3) débouchent au point le plus bas de la pompe.Pump according to claim 1, characterized in that the vents (3) open at the lowest point of the pump. Pompe suivant la revendication 1 ou 2, caractérisée en ce que le détecteur (8) commande le circuit de marche/arrêt du moteur en arrêtant le moteur (4) quand il ne détecte plus de liquide.Pump according to claim 1 or 2, characterized in that the detector (8) controls the on / off circuit of the engine by stopping the motor (4) when it no longer detects liquid. Pompe suivant la revendication 1, 2 ou 3, caractérisée en ce que le détecteur (8) est un capteur de pression, un capteur optique, un générateur d'ultrasons, une sonde de température, un capteur capacitif, un capteur piézo-électrique ou un capteur à membrane souple.Pump according to claim 1, 2 or 3, characterized in that the detector (8) is a pressure sensor, an optical sensor, a generator ultrasound, temperature probe, capacitive sensor, piezoelectric sensor or a flexible membrane sensor. Pompe suivant l'une quelconque des revendications 1 à 4, caractérisée en ce que l'axe (x,x') de la pompe est vertical.Pump according to any one of Claims 1 to 4, characterized in that the axis (x, x ') of the pump is vertical.
EP97402458A 1996-11-19 1997-10-17 Pump with static device for switching it on Expired - Lifetime EP0843100B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9614087 1996-11-19
FR9614087A FR2756020B1 (en) 1996-11-19 1996-11-19 PUMP WITH FIXED START-UP DEVICE

Publications (2)

Publication Number Publication Date
EP0843100A1 true EP0843100A1 (en) 1998-05-20
EP0843100B1 EP0843100B1 (en) 2003-02-26

Family

ID=9497763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402458A Expired - Lifetime EP0843100B1 (en) 1996-11-19 1997-10-17 Pump with static device for switching it on

Country Status (6)

Country Link
EP (1) EP0843100B1 (en)
AT (1) ATE233372T1 (en)
DE (1) DE69719288T2 (en)
DK (1) DK0843100T3 (en)
ES (1) ES2188880T3 (en)
FR (1) FR2756020B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138951A1 (en) 2000-03-31 2001-10-04 Pompes Salmson Submersible pump with capacitive level detection
EP1179681A2 (en) * 2000-08-07 2002-02-13 COMET-Pumpen Systemtechnik GmbH & Co. KG Submersible motor pump unit
EP2848814A1 (en) * 2013-09-12 2015-03-18 Grundfos Holding A/S Sensor for dry running protection

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635546A (en) * 1949-01-05 1953-04-21 Harold F Enyeart Pump control
US4396353A (en) * 1981-04-13 1983-08-02 Flint & Walling, Inc. Submersible sump pump
FR2531148A1 (en) * 1982-07-30 1984-02-03 Guillemot Gilbert Control device for delivery pump
US4645426A (en) * 1985-04-24 1987-02-24 Hartley E Dale Bilge pump
DE3710318A1 (en) * 1987-03-28 1988-10-06 Klein Schanzlin & Becker Ag Device for switching a centrifugal pump on and off, depending on a liquid level
US4881873A (en) * 1988-12-14 1989-11-21 Altus Technology Corporation Capacitance level sensor for a bilge pump
EP0505009A1 (en) * 1991-03-19 1992-09-23 Bronte Whirlpools Limited Pump protection system
US5151016A (en) * 1991-12-05 1992-09-29 Her Tser W Liquid pump responsive to temperature
DE4244417A1 (en) * 1992-12-30 1994-07-07 Wilo Gmbh Device for switching a submersible pump on and off

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635546A (en) * 1949-01-05 1953-04-21 Harold F Enyeart Pump control
US4396353A (en) * 1981-04-13 1983-08-02 Flint & Walling, Inc. Submersible sump pump
FR2531148A1 (en) * 1982-07-30 1984-02-03 Guillemot Gilbert Control device for delivery pump
US4645426A (en) * 1985-04-24 1987-02-24 Hartley E Dale Bilge pump
DE3710318A1 (en) * 1987-03-28 1988-10-06 Klein Schanzlin & Becker Ag Device for switching a centrifugal pump on and off, depending on a liquid level
US4881873A (en) * 1988-12-14 1989-11-21 Altus Technology Corporation Capacitance level sensor for a bilge pump
EP0505009A1 (en) * 1991-03-19 1992-09-23 Bronte Whirlpools Limited Pump protection system
US5151016A (en) * 1991-12-05 1992-09-29 Her Tser W Liquid pump responsive to temperature
DE4244417A1 (en) * 1992-12-30 1994-07-07 Wilo Gmbh Device for switching a submersible pump on and off

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1138951A1 (en) 2000-03-31 2001-10-04 Pompes Salmson Submersible pump with capacitive level detection
EP1179681A2 (en) * 2000-08-07 2002-02-13 COMET-Pumpen Systemtechnik GmbH & Co. KG Submersible motor pump unit
EP1179681A3 (en) * 2000-08-07 2004-06-09 COMET-Pumpen Systemtechnik GmbH & Co. KG Submersible motor pump unit
EP2848814A1 (en) * 2013-09-12 2015-03-18 Grundfos Holding A/S Sensor for dry running protection
CN104454562A (en) * 2013-09-12 2015-03-25 格兰富控股联合股份公司 Dry running detection system
US9910002B2 (en) 2013-09-12 2018-03-06 Grundfos Holding A/S Dry running detection system

Also Published As

Publication number Publication date
EP0843100B1 (en) 2003-02-26
ATE233372T1 (en) 2003-03-15
DE69719288T2 (en) 2003-09-18
DK0843100T3 (en) 2003-04-14
ES2188880T3 (en) 2003-07-01
FR2756020B1 (en) 1999-01-08
FR2756020A1 (en) 1998-05-22
DE69719288D1 (en) 2003-04-03

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