EP0902185A1 - Control of a submersible electric pump in response to the level of water - Google Patents

Control of a submersible electric pump in response to the level of water Download PDF

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Publication number
EP0902185A1
EP0902185A1 EP98401910A EP98401910A EP0902185A1 EP 0902185 A1 EP0902185 A1 EP 0902185A1 EP 98401910 A EP98401910 A EP 98401910A EP 98401910 A EP98401910 A EP 98401910A EP 0902185 A1 EP0902185 A1 EP 0902185A1
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EP
European Patent Office
Prior art keywords
water
khz
receiver
transmitter
machine
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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
EP98401910A
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German (de)
French (fr)
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EP0902185B1 (en
Inventor
Jacques Berthon
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KSB SAS
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KSB SAS
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Publication date
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Priority to DK98401910T priority Critical patent/DK0902185T3/en
Publication of EP0902185A1 publication Critical patent/EP0902185A1/en
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Publication of EP0902185B1 publication Critical patent/EP0902185B1/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/025—Stopping, starting, unloading or idling control by means of floats

Definitions

  • the electromagnetic waves above 100 kHz emitted by the transmitter could not reach the receiver than going through water. As these waves are not susceptible to spread in water, they do not reach the receiver. The machine can then, as desired, be in operation or out of operation. But when the water level drops, it discovers a passage for the waves between the transmitter and the receiver. The receiver is activated and thus controls the switching the machine on or off. We has a symmetrical functioning of that which has just been indicated, when one uses electromagnetic waves with frequencies between 10 kHz and 100 kHz.
  • the pump 4 is placed in a sump 3 in which the level of the liquid changes from 1 to 2.
  • the liquid is evacuated by the delivery pipe 5.
  • the power supply to the pump is supplied by the cable 6 permanently connected to the electrical network 10 by the socket stream 9.
  • a radio receiver 7 In the pump made of composite materials (not metallic), is placed a radio receiver 7.
  • transmitter 8 emits an electromagnetic signal at a frequency 30 kHz radio
  • receiver 7 will receive it when the water level is higher than the location of the receiving antenna.
  • the pump is running. When the water level drops below this level, the signal emitted is no longer received. Pump 4 is stopped.
  • FIG. 2 illustrates an electric pump group which has been shown to be the envelope 11 of composite material.
  • This envelope delimits two ears 12, 13 in which are respectively housed a transmitter 14 of waves electromagnetic and an electromagnetic wave receiver.
  • the transmitter 14 and the receiver 15 are separated from each other inside of the envelope 11 by a metallic wave guide 16 which opposes the passage of electromagnetic waves inside the envelope 11, from the transmitter 14 to receiver 15.
  • the difference in the variant of FIG. 3, representative of the operation at a frequency between 10 and 100 kHz, lies in the removal of the waveguide which is no longer essential in this configuration, because in this case the water improving the binding must have a predominant action.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

Uses electromagnetic waves which in the frequency range greater than 100 kilo Hertz do not propagate in water but do propagate in water between a frequency range from 10 to 100 kilo Hertz. The control system is based on the fact that electromagnetic waves in the range between 10 to 100 kilo Hertz propagate better in water than in air. The control system has a receiver (7) designed to receive waves either greater than 100 kilo Hertz or between 10 to 100 kilo Hertz, and a transmitter (8) separated from the receiver by an obstacle to wave propagation. Both transmitter and receiver are contained in a non metallic enclosure made from a composite material.

Description

La présente invention se rapporte à la commande d'une machine submersible dans l'eau, notamment d'un groupe électropompe.The present invention relates to the control of a machine submersible in water, in particular from an electric pump group.

Les pompes de vide cave sont utilisées principalement pour vider un puisard dans lequel sont recueillies les eaux en provenance de la pluie ou d'une remontée de la nappe phréatique. Ces pompes peuvent être aussi utilisées pour vider un bassin ou une piscine. On effectue en général la mise en marche de ces pompes automatiquement par l'intermédiaire d'un dispositif mécanique intégré. Ce dispositif peut être un bras entraíné mécaniquement par un flotteur, un dispositif contacteur dans lequel une bille se déplaçant à l'intérieur d'un flotteur établit un contact ou un dispositif contacteur avec une ampoule de mercure.Cellar vacuum pumps are mainly used to empty a sump in which the water from the rain is collected or a rise in the water table. These pumps can also be used to empty a basin or a swimming pool. We generally make the bet these pumps running automatically via a device integrated mechanical. This device can be a mechanically driven arm by a float, a contactor device in which a ball moving at the interior of a float establishes a contact or a contacting device with a mercury bulb.

Tous les dispositifs de commande utilisés actuellement nécessitent, autour de la pompe, un volume dans lequel ils doivent pouvoir se déplacer sans gêne pour agir. De plus, en raison de leur conception mécanique, leur fonctionnement peut être entravé par des particules plus ou moins grosses (feuilles mortes, papiers), qui peuvent se trouver dans l'eau.All the control devices currently used require, around the pump, a volume in which they must be able to move without embarrassment to act. In addition, due to their mechanical design, their operation can be hampered by larger or smaller particles (dead leaves, papers), which can be found in water.

L'invention vise à commander une machine submersible dans l'eau d'une manière qui ne nécessite pas de maintenir une étanchéité et qui est très simple, ce qui permet d'obtenir des coûts de réalisation très bas. La commande met en oeuvre des éléments purement statiques, c'est-à-dire sans déplacement d'un élément mécanique, en sorte que la maintenance est très réduite. La commande est entièrement indépendante de la charge de l'eau, de sa température et de sa viscosité, ainsi que de la forme du puisard dans lequel est immergée la machine. Enfin, cette commande n'est pas gênante pour l'animal, qui ne l'entend pas, à la différence d'une onde ultrasonore, telle que préconisée au US-A-4 897 822, dont l'utilisation nécessite de plus des appareils émetteurs et récepteurs piézoélectriques plus compliqués et plus coûteux. The invention aims to control a machine submersible in water in a way that doesn't require maintaining a seal and that is very simple, which allows very low production costs. The command implements purely static elements, that is to say without movement of a mechanical element, so that maintenance is very scaled down. The control is completely independent of the water load, its temperature and viscosity, as well as the shape of the sump in which the machine is submerged. Finally, this command is not troublesome for the animal, which does not hear it, unlike an ultrasonic wave, such as recommended in US-A-4,897,822, the use of which also requires more complicated and more piezoelectric transmitting and receiving devices expensive.

Suivant l'invention, on utilise le fait que les ondes électromagnétiques de fréquence supérieure à 100 kHz ne se propagent pas dans l'eau pour la commande d'une machine submersible dans l'eau. On peut aussi utiliser le fait que les ondes électromagnétiques de fréquence comprises entre 10 kHz et 100 kHz se propagent mieux dans l'eau que dans l'air, pour la commande d'une machine submersible dans l'eau. L'invention vise également un procédé de commande d'une machine en fonction de son niveau d'immersion dans l'eau, qui consiste à envoyer des ondes électromagnétiques de fréquence supérieure à 100 kHz ou de fréquence comprise entre 10 et 100 kHz d'un émetteur à un récepteur relié fonctionnellement à la machine suivant un trajet qui, suivant le niveau d'immersion de la machine dans l'eau, passe par de l'eau ou n'y passe pas.According to the invention, the fact that the electromagnetic waves are used of frequency greater than 100 kHz do not propagate in water for the control of a machine submersible in water. We can also use the fact that electromagnetic waves of frequency between 10 kHz and 100 kHz propagate better in water than in air, for control of a machine submersible in water. The invention also relates to a method control of a machine according to its level of immersion in water, which consists of sending electromagnetic waves of frequency greater than 100 kHz or a frequency between 10 and 100 kHz of a transmitter to receiver functionally connected to the machine along a path which, depending on the level of immersion of the machine in water, goes through or does not pass through it.

Quand l'eau est à un niveau élevé, les ondes électromagnétiques supérieures à 100 kHz émises par l'émetteur ne pourraient atteindre le récepteur qu'en passant par l'eau. Comme ces ondes ne sont pas susceptibles de se propager dans l'eau, elles n'atteignent pas le récepteur. La machine peut alors, au choix, être en fonctionnement ou hors de fonctionnement. Mais quand le niveau de l'eau s'abaisse, elle découvre un passage pour les ondes entre l'émetteur et le récepteur. Le récepteur est activé et commande ainsi la mise en fonctionnement ou la mise hors de fonctionnement de la machine. On a un fonctionnement symétrique de celui qui vient d'être indiqué, quand on utilise des ondes électromagnétiques de fréquences comprises entre 10 kHz et 100 kHz.When the water is at a high level, the electromagnetic waves above 100 kHz emitted by the transmitter could not reach the receiver than going through water. As these waves are not susceptible to spread in water, they do not reach the receiver. The machine can then, as desired, be in operation or out of operation. But when the water level drops, it discovers a passage for the waves between the transmitter and the receiver. The receiver is activated and thus controls the switching the machine on or off. We has a symmetrical functioning of that which has just been indicated, when one uses electromagnetic waves with frequencies between 10 kHz and 100 kHz.

L'invention s'applique tout particulièrement à un groupe électropompe submersible qui se caractérise en ce qu'il comprend un récepteur d'ondes électromagnétiques de fréquence supérieure à 100 kHz ou comprise entre 10 et 100 kHz. Dans un mode de réalisation particulièrement préféré, le groupe électropompe comprend un émetteur d'ondes électromagnétiques séparé du récepteur d'ondes électromagnétiques par un obstacle à la propagation des ondes électromagnétiques par un trajet ne passant pas par de l'eau. De la sorte le groupe électropompe peut être rendu plus compact et on n'a pas à redouter que l'émetteur soit séparé accidentellement du récepteur, par exemple par une plaque métallique qui viendrait s'opposer au passage des ondes alors qu'il faudrait qu'elles passent quand de l'eau n'est pas présente. The invention is particularly applicable to an electric pump group submersible which is characterized in that it includes a wave receiver electromagnetic frequency greater than 100 kHz or between 10 and 100 kHz. In a particularly preferred embodiment, the group electropump includes an electromagnetic wave transmitter separate from the electromagnetic wave receiver by an obstacle to the propagation of electromagnetic waves by a path not passing through water. Of the so the pump unit can be made more compact and we don't have to fear that the transmitter will be accidentally separated from the receiver, by example by a metal plate which would oppose the passage of waves when they should pass when water is not present.

De préférence, le groupe électropompe submersible est en un matériau composite, notamment lorsque l'émetteur et le récepteur sont tous deux logés dans l'enveloppe du groupe. Mais on pourrait également prévoir de loger le récepteur dans le puisard à côté du groupe et que celui-ci puisse être métallique.Preferably, the submersible electric pump group is in one composite material, especially when the transmitter and receiver are all two housed in the group envelope. But we could also plan to house the receiver in the sump next to the group and that it can be metallic.

Aux dessins annexés, donnés uniquement à titre d'exemple :

  • la figure 1 est une vue en coupe schématique d'un groupe électropompe submersible suivant l'invention, et
  • les figures 2 et 3 en représentent deux variantes.
    • In the accompanying drawings, given solely by way of example:
  • FIG. 1 is a schematic sectional view of a submersible electric pump group according to the invention, and
  • Figures 2 and 3 show two variants.

    • La pompe 4 est placée dans un puisard 3 dans lequel le niveau du liquide évolue de 1 à 2. Lorsque la pompe fonctionne, le liquide est évacué par le tuyau de refoulement 5. L'alimentation électrique de la pompe est fournie par le câble 6 raccordé en permanence au réseau électrique 10 par la prise de courant 9.The pump 4 is placed in a sump 3 in which the level of the liquid changes from 1 to 2. When the pump is running, the liquid is evacuated by the delivery pipe 5. The power supply to the pump is supplied by the cable 6 permanently connected to the electrical network 10 by the socket stream 9.

    Dans la pompe réalisée en matériaux composites (non métalliques), est placé un récepteur radio 7. Un émetteur 8, situé dans la prise de courant de la pompe, émet en permanence un signal électromagnétique d'une puissance de quelques mW à une fréquence radio autorisée (27 MHz, 72 MHz, 433 MHz).In the pump made of composite materials (not metallic), is placed a radio receiver 7. A transmitter 8, located in the socket of the pump, continuously emits an electromagnetic signal from a power of a few mW at an authorized radio frequency (27 MHz, 72 MHz, 433 MHz).

    Le récepteur 7, dont l'antenne est située dans l'enveloppe composite étanche de la pompe, reçoit ce signal lorsque le niveau de l'eau est inférieur à l'emplacement de l'antenne de réception. La pompe est alors arrêtée. Si le niveau de l'eau remonte et recouvre l'antenne, la détection de l'émission ne se fait plus et la pompe 4 est mise en service. Le fonctionnement se maintient alors jusqu'à l'épuisement créant un désamorçage de la pompe. L'écart de courant absorbé qui en découle donne l'ordre de l'arrêt. Une variante consiste à donner l'ordre d'arrêt par l'intermédiaire d'une temporisation déclenchée à la mise en marche de la pompe.Receiver 7, whose antenna is located in the composite envelope pump tight, receives this signal when the water level is below the location of the receiving antenna. The pump is then stopped. If the water level rises and covers the antenna, the emission detection is not does more and pump 4 is put into service. The operation is maintained then until the exhaustion creating a defusing of the pump. Away from resulting absorbed current gives the order to stop. A variant consists to give the stop order by means of a timer triggered at the pump start-up.

    Si l'émetteur 8 émet un signal électromagnétique à une fréquence radio de 30 kHz, le récepteur 7 le recevra lorsque le niveau de l'eau est supérieur à l'emplacement de l'antenne de réception. La pompe fonctionne. Lorsque le niveau de l'eau descend au dessous de ce niveau, le signal émis n'est plus reçu. La pompe 4 est arrêtée.If the transmitter 8 emits an electromagnetic signal at a frequency 30 kHz radio, receiver 7 will receive it when the water level is higher than the location of the receiving antenna. The pump is running. When the water level drops below this level, the signal emitted is no longer received. Pump 4 is stopped.

    La figure 2 illustre un groupe électropompe dont on a représenté que l'enveloppe 11 en matériau composite. Cette enveloppe délimite deux oreilles 12, 13 dans lesquelles sont logées respectivement un émetteur 14 d'ondes électromagnétiques et un récepteur 15 d'ondes électromagnétiques. L'émetteur 14 et le récepteur 15 sont séparés l'un de l'autre à l'intérieur de l'enveloppe 11 par un guide d'onde 16 métallique qui s'oppose au passage des ondes électromagnétiques à l'intérieur de l'enveloppe 11, de l'émetteur 14 au récepteur 15.FIG. 2 illustrates an electric pump group which has been shown to be the envelope 11 of composite material. This envelope delimits two ears 12, 13 in which are respectively housed a transmitter 14 of waves electromagnetic and an electromagnetic wave receiver. The transmitter 14 and the receiver 15 are separated from each other inside of the envelope 11 by a metallic wave guide 16 which opposes the passage of electromagnetic waves inside the envelope 11, from the transmitter 14 to receiver 15.

    Lorsque le niveau de l'eau est supérieur au sommet des oreilles 12, 13, les ondes électromagnétiques ne peuvent pas passer de l'émetteur 14 au récepteur 15. En revanche, lorsque ce niveau s'abaisse, les ondes électromagnétiques peuvent passer par l'intervalle compris entre les oreilles 12,13.When the water level is higher than the top of the ears 12, 13, electromagnetic waves cannot pass from transmitter 14 to receiver 15. On the other hand, when this level drops, the waves electromagnetic can pass through the interval between the ears 12.13.

    Dans la variante de la figure 3, représentative du fonctionnement à une fréquence comprise entre 10 et 100 kHz, la différence, par rapport à la figure 2, réside dans la suppression du guide d'onde qui n'est plus indispensable dans cette configuration, car dans ce cas l'eau améliorant la liaison doit avoir une action prédominante.In the variant of FIG. 3, representative of the operation at a frequency between 10 and 100 kHz, the difference, compared to the Figure 2, lies in the removal of the waveguide which is no longer essential in this configuration, because in this case the water improving the binding must have a predominant action.

    Claims (6)

    L'utilisation du fait que les ondes électromagnétiques de fréquence supérieure à 100 kHz ne se propagent pas dans l'eau pour la commande d'une machine submersible dans l'eau.The use of the fact that frequency electromagnetic waves higher than 100 kHz do not propagate in water for the control of a machine submersible in water. L'utilisation du fait que les ondes électromagnétiques de fréquence comprises entre 10 kHz et 100 kHz se propagent mieux dans l'eau que dans l'air, pour la commande d'une machine submersible dans l'eau.The use of the fact that frequency electromagnetic waves between 10 kHz and 100 kHz propagate better in water than in air, for controlling a machine submersible in water. Procédé de commande d'une machine en fonction de son niveau d'immersion dans l'eau, caractérisé en ce qu'il consiste à envoyer des ondes électromagnétiques de fréquence supérieure à 100 kHz ou de fréquence comprise entre 10 kHz et 100 kHz d'un émetteur à un récepteur relié fonctionnellement à la machine suivant un trajet qui, suivant le niveau d'immersion de la machine dans l'eau, passe par de l'eau ou n'y passe pas.Method of controlling a machine according to its level immersion in water, characterized in that it consists in sending waves electromagnetic frequency greater than 100 kHz or frequency between 10 kHz and 100 kHz from a transmitter to a receiver connected functionally by machine on a path which, depending on the level immersion of the machine in water, passes through water or does not pass there. Groupe électropompe submersible, caractérisé en ce qu'il comprend un récepteur (7,14) d'ondes électromagnétiques de fréquence supérieure à 100 kHz ou comprise entre 10 kHz et 100 kHz.Submersible electric pump group, characterized in that it comprises a receiver (7,14) of electromagnetic waves of frequency higher than 100 kHz or between 10 kHz and 100 kHz. Groupe suivant la revendication 3, caractérisé en ce qu'il comprend un émetteur (15) d'ondes électromagnétiques séparé du récepteur (14) d'ondes électromagnétiques par un obstacle (16) à la propagation des ondes électromagnétiques par un trajet ne passant pas par de l'eau.Group according to claim 3, characterized in that it comprises an electromagnetic wave transmitter (15) separate from the receiver (14) of electromagnetic waves by an obstacle (16) to the propagation of waves electromagnetic by a path not passing by water. Groupe suivant la revendication 3 ou 4, caractérisé en ce que son enveloppe (11) est en matériau composite et l'émetteur (15) et le récepteur (14) sont logés dans l'enveloppe.Group according to claim 3 or 4, characterized in that its envelope (11) is made of composite material and the transmitter (15) and the receiver (14) are housed in the envelope.
    EP98401910A 1997-09-12 1998-07-27 Control of a submersible electric pump in response to the level of water Expired - Lifetime EP0902185B1 (en)

    Priority Applications (1)

    Application Number Priority Date Filing Date Title
    DK98401910T DK0902185T3 (en) 1997-09-12 1998-07-27 Control of an electrically driven submersible pump as a function of the water level

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9711371A FR2768469B1 (en) 1997-09-12 1997-09-12 CONTROL OF A MACHINE, IN PARTICULAR OF A SUBMERSIBLE ELECTRIC PUMP, ACCORDING TO ITS LEVEL IN THE WATER
    FR9711371 1997-09-12

    Publications (2)

    Publication Number Publication Date
    EP0902185A1 true EP0902185A1 (en) 1999-03-17
    EP0902185B1 EP0902185B1 (en) 2004-10-13

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98401910A Expired - Lifetime EP0902185B1 (en) 1997-09-12 1998-07-27 Control of a submersible electric pump in response to the level of water

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    EP (1) EP0902185B1 (en)
    AT (1) ATE279650T1 (en)
    DE (1) DE69826952T2 (en)
    DK (1) DK0902185T3 (en)
    ES (1) ES2226082T3 (en)
    FR (1) FR2768469B1 (en)
    PT (1) PT902185E (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2919357A1 (en) * 2007-07-27 2009-01-30 Ksb Sas Soc Par Actions Simpli Pump i.e. water immersed pump, has electronic chip including body provided with antenna and incorporated in handle, where handle is made of insulating plastic material and extended in asymmetrical manner with respect to shaft of motor

    Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB2179738A (en) * 1985-08-20 1987-03-11 Formula Systems Ltd Fluid level responsive apparatus
    US4897822A (en) * 1989-02-10 1990-01-30 Korten Jerome B PLL sonic bilge pump switch
    US5623252A (en) * 1995-05-22 1997-04-22 Cacciola; John A. Liquid level detector using audio frequencies

    Patent Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB2179738A (en) * 1985-08-20 1987-03-11 Formula Systems Ltd Fluid level responsive apparatus
    US4897822A (en) * 1989-02-10 1990-01-30 Korten Jerome B PLL sonic bilge pump switch
    US5623252A (en) * 1995-05-22 1997-04-22 Cacciola; John A. Liquid level detector using audio frequencies

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2919357A1 (en) * 2007-07-27 2009-01-30 Ksb Sas Soc Par Actions Simpli Pump i.e. water immersed pump, has electronic chip including body provided with antenna and incorporated in handle, where handle is made of insulating plastic material and extended in asymmetrical manner with respect to shaft of motor

    Also Published As

    Publication number Publication date
    ES2226082T3 (en) 2005-03-16
    DE69826952T2 (en) 2005-11-17
    FR2768469A1 (en) 1999-03-19
    ATE279650T1 (en) 2004-10-15
    EP0902185B1 (en) 2004-10-13
    DE69826952D1 (en) 2004-11-18
    FR2768469B1 (en) 1999-10-29
    PT902185E (en) 2005-02-28
    DK0902185T3 (en) 2004-12-06

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