EP0219360B1 - Control device for a water supply installation - Google Patents

Control device for a water supply installation Download PDF

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Publication number
EP0219360B1
EP0219360B1 EP86401545A EP86401545A EP0219360B1 EP 0219360 B1 EP0219360 B1 EP 0219360B1 EP 86401545 A EP86401545 A EP 86401545A EP 86401545 A EP86401545 A EP 86401545A EP 0219360 B1 EP0219360 B1 EP 0219360B1
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EP
European Patent Office
Prior art keywords
pump
control circuit
enclosure
transducer
check valve
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Expired
Application number
EP86401545A
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German (de)
French (fr)
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EP0219360A1 (en
Inventor
Claude Grenon
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Ets Pompes Guinard Dite Ste
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Ets Pompes Guinard Dite Ste
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Application filed by Ets Pompes Guinard Dite Ste filed Critical Ets Pompes Guinard Dite Ste
Priority to AT86401545T priority Critical patent/ATE44803T1/en
Publication of EP0219360A1 publication Critical patent/EP0219360A1/en
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    • 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
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure

Definitions

  • the present invention relates to devices for controlling a water supply installation.
  • a device for controlling a water supply installation which comprises an airtight and water tight enclosure.
  • This enclosure opens an input intended to be connected by a non-return valve to a pump with an electric control circuit. It also leads to an outlet intended to be connected to a user device such as a tap, for example, a shower.
  • the enclosure is provided with means for reducing its volume when the pressure therein decreases. (Exponent type hydrostat supplied by EXPO / S in Lillesand Norway).
  • This device has the great advantage of eliminating continual pressure variations in the installation, which are unpleasant to the user, compared with the prior known devices with a reservoir and a pressure switch, interposed between the pump and the valve.
  • this Norwegian device comprises a body in which are delimited a first chamber where the water arrives from the pump by a non-return valve.
  • the pressure in this chamber depends directly on the pressure delivered by the pump.
  • a second air chamber is planned.
  • the pre-inflation pressure in this chamber determines the pump start-up pressure.
  • a third chamber is separated from the second by a piston and from the first by a valve with a nozzle.
  • the air pressure in the second chamber lowers the piston which separates the second chamber from the third chamber.
  • a magnet carried by the upper part of the piston releases the contactor which controls the pump and, on power-up, the pump starts.
  • the piston in the low position pushes the valve separating the first chamber from the third chamber and puts these chambers in communication.
  • Water from the pump passes through the first chamber and goes to the third chamber through the open valve. If the tap is closed, the pressure increases in the third chamber and pushes back the piston which separates the second chamber from the third chamber. Going up, the piston releases the valve which closes. Water continues to penetrate gently into the third chamber through the nozzle by pushing the piston. In the high position of the piston, the magnet opens the contactor and stops the pump. When the tap is opened, water flows from the third chamber. The air pressure in the second chamber pushes the piston back. The magnet attached to the piston descends and establishes the power contact for the pump which starts. If the pump flow is higher than the tap flow, the pressure rises in the third chamber and causes the piston to be pushed back to the second chamber.
  • This device can only operate in a vertical position. In the other positions, the movement of the magnet, obtained using springs, is hindered.
  • This device is complex because it includes a large number of moving parts.
  • the nozzle may be clogged with water impurities or with limescale.
  • the pressure can no longer increase in the third chamber and push back the piston to stop the pump.
  • a relatively large pressure variation of 0.6 to 1.4 bar is required depending on the pre-inflation pressure of the second chamber. This pressure variation is linked to the stroke of the piston to establish or cut the contact which controls the pump.
  • the major disadvantage is that, if the tap is open, the pump starts and continues to operate, even if it does not deliver (for example because there is no more water in the well, because the pump is deactivated, because a pipe is blocked, etc.). This operation without flow or without water causes rapid destruction of the pump. And even if the valve is closed in such an operating case, as the pump no longer provides flow, the pressure in the third chamber cannot rise and command the pump to stop.
  • the device according to the invention overcomes the aforementioned drawbacks by allowing operation in a position other than vertical, while having few moving parts. Any danger of clogging of a nozzle is eliminated.
  • the pressure variation which is necessary to control the cycles of starting and stopping of the pump is much less than before, which makes it possible to use pumps whose characteristic is relatively flat (curve of variation of the height as a function of flow).
  • the device according to the invention provides unequaled security compared to the previous device when the pump is operating without delivering by the fact that in this case the pump stops operating soon after the incident.
  • US-A-4 124 331 describes a device which stops the pump when it does not deliver. This device has a different and rather complex structure.
  • the control device is characterized in that the non-return valve cooperates with a second transducer intended to energize the pump control circuit when the non-return valve is open, the two transducers being electrically connected along two branches in parallel on the electrical control circuit of the pump and the first transducer is connected to the electrical control circuit of the pump by a relay to de-energize its connection branch after a prescribed period.
  • the installation represented in FIG. 1 comprises a well 1 of water communicating by a conduit 2 with the admission of a pump 3.
  • the discharge of the pump communicates by a conduit 4 with a tap 5, a device 6 according to the the invention being mounted on this conduit 4.
  • the device according to the invention is shown in Figure 2. It comprises a body 7 of airtight and water tight plastic. This body is provided with an inlet 8 intended to be connected to the pump 3 and an outlet 9 intended to be connected to the tap 5.
  • the interior of the body is subdivided by a partition 10 into a compartment 11 for housing the circuits electrical and in an enclosure 12 into which open the inlet and outlet 8 and 9.
  • a membrane which could be elastic where auttle the required elasticity could be imparted by a spring and which, in this case, receives its elasticity by a chamber air 14, extends in the enclosure by resting on a cup 15 provided with two orifices 16 and 17.
  • the cup also provides, around the orifice 17, a sleeve 18.
  • a pre-inflation valve 19 is provided to allow the compartment 14 to be inflated by introducing air into it.
  • a rod 20 is pushed back by the membrane 13 while being guided by the sleeve. It enters by its opposite end into a housing formed by a sheath 21 molded with the wall 10. In an intermediate position on the rod 20, is provided a flange 22 on which the end of a helical spring 23 rests the other end of which rests on an internal shoulder 24 of the sleeve 21. In the end of the rod 20 opposite the membrane 13, two magnets 25 are embedded. Opposite these magnets when the rod 20 is pressed in maximum in the sheath 21, there is a Hall effect cell 26 soldered to a printed circuit 27 constituting the control circuit of the pump 3.
  • the cell 26 is connected to the printed circuit 27 by means of a relay 28 power off of the branch of the circuit on which the cell 26 is mounted after a prescribed time, in this case 6 seconds.
  • the membrane 13 and the compartment 14 constitute means for reducing the volume of the enclosure 12 when the pressure therein decreases. All of the parts 20 to 26 constitute a first transducer intended to energize the electrical circuit controlling the pump when the volume of the enclosure has decreased to a given value, in this case when the membrane 13 s apply tightly to cup 15.
  • a non-return valve 29 comprising a disc 30 and a pusher 31 whose free end is housed in a cavity of the sleeve 21 for guidance purposes.
  • a helical return spring 32 is mounted between the sheath 21 and the valve 30 around the rod 31, around the rod 31, a helical return spring 32.
  • a protrusion 33 carrying two magnets 34.
  • a Hall effect cell 35 whose legs 36 forming connection branches are welded to the printed circuit 27 serving as a control circuit for the pump 3.
  • An indicator light 37 makes it possible to see if the circuit 27 is energized.
  • An indicator light 38 makes it possible to see if the Hall effect cell 26 is energized.
  • An indicator light 39 makes it possible to see if the Hall effect cell 35 is energized.
  • a push button 40 with exit button enables the circuit 27 to be energized from the outside independently of the connection of cells 26 and 35.
  • the control device according to the invention operates in the following manner.
  • the pump 3 does not work and the valve 5 is closed.
  • the non-return valve 29 is applied to its seat.
  • the rod 20 is in the low position, which means that the magnets 25 are distant from the cell 26.
  • the membrane 13 is not applied to the cup 15 so that the volume of the enclosure 12 is relatively large.
  • the water therein is under a pressure of 3 bar, the pressure of compartment 14 being of course also 3 bar.
  • the tap 5 has been opened.
  • the pressure in the enclosure 12 decreases to 1 bar.
  • the membrane 13 tends to be applied against the cup 15 by reducing the volume of the enclosure 12.
  • the pressure in the compartment 14 comes back to 1 bar, which is the pre-inflation pressure obtained by the valve 19, of the water passing of the space between the membrane 13 and the cup 15 in the enclosure 12 through the hole 16.
  • the membrane 13 pushes the rod 20 against the spring 23.
  • the magnets 25 come opposite the cell 26 and the 'excite.
  • the cell 26 controls via the relay 28 the electrical circuit 27 for controlling the pump. Pump 3 is running.
  • Figure 6 shows the normal operating state of the installation.
  • the membrane 13 has moved away from the cup 15, and the rod 20 no longer being pushed back by the membrane, the spring 23 pushes the flange 22 on the edge of the sleeve 18.
  • the magnets 25 move away from cell 26 and de-energize it.
  • the motor control circuit 27 remains energized, however, due to the cooperation of the magnets 34 and the cell 35, the remoteness of the magnets 34 from the cell 35 causing the latter to energize the circuit 27 while when the magnets 34 are opposite the cell 35 when the non-return valve 29 is applied to its seat, the cell ceases to energize the circuit 27.
  • Hall effect cells one could also use flexible blade switches or other transducer elements capable of opening or closing an electrical circuit in response to the detection of a displacement.

Abstract

1. A control arrangement for a water supply installation comprising : - an air tight and water tight enclosure (12), with an input (8) to be connected to a pump (3) with an electric control circuit (27) by means of a check valve (29), and an outlet (9) to be connected to a user device (5), and which is provided with means (13, 14) for reducing the volume of the enclosure when the pressure which prevails therein decreases, and - a first transducer for energising the electric control circuit (27) of the pump (3) when the volume in the enclosure (12) is reduced to a predetermined value, characterized in that - the check valve (29) cooperates with a second transducer (34, 35) for energising the control circuit (27) of the pump when the check valve (29) is open, the two transducers (20-26, 34, 35) being electrically connected in two parallel branches to the electric control circuit (27) of the pump, and - the first transducer (20-26) is connected to the electrical control circuit (27) of the pump by means of a relay (28) for de-energising its branch after a predetermined time period.

Description

La présente invention est relative aux dispositifs de commande d'une installation d'alimentation en eau.The present invention relates to devices for controlling a water supply installation.

On connaît déjà un dispositif de commande d'une installation d'alimentation en eau qui comprend une enceinte étanche à l'air et à l'eau. Dans cette enceinte débouche une entrée destinée à être reliée par un clapet anti-retour à une pompe à circuit électrique de commande. Y débouche également une sortie destinée à être reliée à un dispositif utilisateur tel qu'un robinet, par exemple, de douche. L'enceinte est munie de moyens pour en diminuer le volume quand la pression qui y règne diminue. (Hydrostat type exponent fourni par la Société EXPO/S à Lillesand Norvège).There is already known a device for controlling a water supply installation which comprises an airtight and water tight enclosure. In this enclosure opens an input intended to be connected by a non-return valve to a pump with an electric control circuit. It also leads to an outlet intended to be connected to a user device such as a tap, for example, a shower. The enclosure is provided with means for reducing its volume when the pressure therein decreases. (Exponent type hydrostat supplied by EXPO / S in Lillesand Norway).

Ce dispositif a le grand avantage de supprimer des variations continuelles de pression dans l'installation, désagréables à l'utilisateur, par rapport aux dispositifs antérieurs connus à réservoir et à contacteur manométrique, interposés entre la pompe et le robinet.This device has the great advantage of eliminating continual pressure variations in the installation, which are unpleasant to the user, compared with the prior known devices with a reservoir and a pressure switch, interposed between the pump and the valve.

D'une manière plus détaillée, ce dispositif norvégien comporte un corps dans lequel sont délimitées une première chambre où l'eau arrive de la pompe par un clapet anti-retour. La pression dans cette chambre dépend directement de la pression délivrée par la pompe. Il est prévu une deuxième chambre à air. La pression de prégonflage de cette chambre détermine la pression de mise en marche de la pompe. Enfin, une troisième chambre est séparée de la deuxième par un piston et de la première par un clapet avec un ajutage. Au repos, la pression de l'air de la deuxième chambre fait descendre le piston qui sépare la deuxième chambre de la troisième chambre. Un aimant porté par la partie supérieure du piston libère le contacteur qui commande la pompe et, à la mise sous tension, la pompe démarre. Le piston en position basse repousse le clapet séparant la première chambre de la troisième chambre et met ces chambres en communication. L'eau provenant de la pompe traverse la première chambre et va vers la troisième chambre à travers le clapet ouvert. Si le robinet est fermé, la pression augmente dans la troisième chambre et repousse le piston qui sépare la deuxième chambre de la troisième chambre. En remontant, le piston libère le clapet qui se ferme. De l'eau continue à pénétrer doucement dans la troisième chambre par l'ajutage en repoussant le piston. En position haute du piston, l'aimant ouvre le contacteur et arrête la pompe. Lorsque l'on ouvre le robinet, de l'eau s'écoule de la troisième chambre. La pression de l'air de la deuxième chambre repousse le piston. L'aimant solidaire du piston descend et établit le contact d'alimentation de la pompe qui démarre. Si le débit de la pompe est supérieur au débit du robinet, la pression remonte dans la troisième chambre et fait que le piston est repoussé vers la deuxième chambre. En remontant le piston libère le clapet qui se referme et provoque ainsi un laminage de l'eau au passage entre les première et troisième chambres. Si la perte de charge à ce passage devient trop importante, la pression dans la troisième chambre diminue. L'air de la deuxième chambre repousse le piston qui va ouvrir le clapet. Il y a donc équilibre de pression entre les deuxième chambre et troisième chambre ainsi que dans toute l'installation.In more detail, this Norwegian device comprises a body in which are delimited a first chamber where the water arrives from the pump by a non-return valve. The pressure in this chamber depends directly on the pressure delivered by the pump. A second air chamber is planned. The pre-inflation pressure in this chamber determines the pump start-up pressure. Finally, a third chamber is separated from the second by a piston and from the first by a valve with a nozzle. At rest, the air pressure in the second chamber lowers the piston which separates the second chamber from the third chamber. A magnet carried by the upper part of the piston releases the contactor which controls the pump and, on power-up, the pump starts. The piston in the low position pushes the valve separating the first chamber from the third chamber and puts these chambers in communication. Water from the pump passes through the first chamber and goes to the third chamber through the open valve. If the tap is closed, the pressure increases in the third chamber and pushes back the piston which separates the second chamber from the third chamber. Going up, the piston releases the valve which closes. Water continues to penetrate gently into the third chamber through the nozzle by pushing the piston. In the high position of the piston, the magnet opens the contactor and stops the pump. When the tap is opened, water flows from the third chamber. The air pressure in the second chamber pushes the piston back. The magnet attached to the piston descends and establishes the power contact for the pump which starts. If the pump flow is higher than the tap flow, the pressure rises in the third chamber and causes the piston to be pushed back to the second chamber. Going up the piston releases the valve which closes and thus causes a rolling of the water in the passage between the first and third chambers. If the pressure drop at this passage becomes too great, the pressure in the third chamber decreases. The air in the second chamber repels the piston which will open the valve. There is therefore a pressure balance between the second and third chambers as well as throughout the installation.

Ce dispositif ne peut fonctionner qu'en position verticale. Dans les autres positions, le déplacement de l'aimant, obtenu à l'aide de ressorts, est gêné. Ce dispositif est complexe car il comprend un grand nombre de pièces en mouvement. L'ajutage peut être colmaté par des impuretés de l'eau ou par le calcaire. En cas d'obstruction de l'ajutage, lors de la fermeture du robinet, la pression ne peut plus augmenter dans la troisième chambre et repousser le piston pour provoquer l'arrêt de la pompe. Pour commander les cycles de mise en marche et d'arrêt, il faut une variation de pression relativement importante de 0,6 à 1,4 bar suivant la pression de prégonflage de la deuxième chambre. Cette variation de pression est liée à la course du piston pour établir ou pour couper le contact qui commande la pompe. L'inconvénient majeur est cependant que, si le robinet est ouvert, la pompe démarre et continue de fonctionner, même si elle ne débite pas (par exemple parce qu'il n'y a plus d'eau dans le puits, parce que la pompe est désamorcée, parce qu'une tuyauterie est bouchée, etc...). Ce fonctionnement sans débit ou sans eau entraîne une destruction rapide de la pompe. Et même si l'on ferme le robinet dans un tel cas de fonctionnement, comme la pompe ne fournit plus de débit, la pression dans la troisième chambre ne peut pas remonter et commander l'arrêt de la pompe.This device can only operate in a vertical position. In the other positions, the movement of the magnet, obtained using springs, is hindered. This device is complex because it includes a large number of moving parts. The nozzle may be clogged with water impurities or with limescale. In case of obstruction of the nozzle, when the valve is closed, the pressure can no longer increase in the third chamber and push back the piston to stop the pump. To control the start and stop cycles, a relatively large pressure variation of 0.6 to 1.4 bar is required depending on the pre-inflation pressure of the second chamber. This pressure variation is linked to the stroke of the piston to establish or cut the contact which controls the pump. The major disadvantage, however, is that, if the tap is open, the pump starts and continues to operate, even if it does not deliver (for example because there is no more water in the well, because the pump is deactivated, because a pipe is blocked, etc.). This operation without flow or without water causes rapid destruction of the pump. And even if the valve is closed in such an operating case, as the pump no longer provides flow, the pressure in the third chamber cannot rise and command the pump to stop.

Le dispositif suivant l'invention pallie les inconvénients précités en permettant un fonctionnement en une position autre que verticale, tout en ayant peu de pièces en mouvement. Tout danger de colmatage d'un ajutage est supprimé. La variation de pression qui est nécessaire pour commander les cycles de mise en marche et d'arrêt de la pompe est bien moindre qu'antérieurement, ce qui permet de faire appel à des pompes dont la caractéristique est relativement plate (courbe de variation de la hauteur en fonction du débit). Enfin et surtout, le dispositif suivant l'invention apporte une sécurité inégalée par rapport au dispositif antérieur lorsque la pompe fonctionne sans débiter par le fait que dans ce cas la pompe s'arrête de fonctionner peu après l'incident.The device according to the invention overcomes the aforementioned drawbacks by allowing operation in a position other than vertical, while having few moving parts. Any danger of clogging of a nozzle is eliminated. The pressure variation which is necessary to control the cycles of starting and stopping of the pump is much less than before, which makes it possible to use pumps whose characteristic is relatively flat (curve of variation of the height as a function of flow). Finally and above all, the device according to the invention provides unequaled security compared to the previous device when the pump is operating without delivering by the fact that in this case the pump stops operating soon after the incident.

Le US-A-4 124 331 décrit un dispositif qui arrête la pompe quand elle ne débite pas. Ce dispositif comporte une structure différente et plutôt complexe.US-A-4 124 331 describes a device which stops the pump when it does not deliver. This device has a different and rather complex structure.

Le dispositif de commande suivant l'invention, est caractérisé en ce que le clapet anti-retour coopère avec un second transducteur destiné à mettre sous tension le circuit de commande de la pompe quand le clapet anti-retour est ouvert, les deux transducteurs étant connectés électriquement suivant deux branches en parallèle sur le circuit électrique de commande de la pompe et le premier transducteur est connecté au circuit électrique de commande de la pompe par un relais de mise hors tension de sa branche de connection après une durée prescrite.The control device according to the invention is characterized in that the non-return valve cooperates with a second transducer intended to energize the pump control circuit when the non-return valve is open, the two transducers being electrically connected along two branches in parallel on the electrical control circuit of the pump and the first transducer is connected to the electrical control circuit of the pump by a relay to de-energize its connection branch after a prescribed period.

Dès qu'un incident se produit, alors que la pompe fonctionne, le clapet anti-retour se referme et par ce fait même le circuit de commande de la pompe interrompt le fonctionnement de celle-ci puisque tant le premier que le second transducteurs sont alors mis hors-tension.As soon as an incident occurs, while the pump is running, the non-return valve closes and by this very fact the pump control circuit interrupts its operation since both the first and the second transducers are then turned off.

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

  • La figure 1 est un schéma d'une installation suivant l'invention,
  • La figure 2 est une vue en coupe du dispositif de commande d'une installation d'alimentation en eau suivant l'invention avant qu'il ait été raccordé à une pompe et à un dispositif utilisateur, et
  • Les figures 3 à 8 sont des vues de ce dispositif illustrant les diverses étapes de fonctionnement.
In the accompanying drawings, given solely by way of example:
  • FIG. 1 is a diagram of an installation according to the invention,
  • FIG. 2 is a sectional view of the control device for a water supply installation according to the invention before it has been connected to a pump and to a user device, and
  • Figures 3 to 8 are views of this device illustrating the various stages of operation.

L'installation représentée à la figure 1 comporte un puits 1 d'eau communiquant par un conduit 2 avec l'admission d'une pompe 3. Le refoulement de la pompe communique par un conduit 4 avec un robinet 5, un dispositif 6 suivant l'invention étant monté sur ce conduit 4.The installation represented in FIG. 1 comprises a well 1 of water communicating by a conduit 2 with the admission of a pump 3. The discharge of the pump communicates by a conduit 4 with a tap 5, a device 6 according to the the invention being mounted on this conduit 4.

Le dispositif suivant l'invention est représenté à la figure 2. Il comprend un corps 7 en matière plastique étanche à l'air et à l'eau. Ce corps est muni d'une entrée 8 destinée à être raccordée à la pompe 3 et d'une sortie 9 destinée à être raccordée au robinet 5. L'intérieur du corps est subdivisé par une cloison 10 en un compartiment 11 pour loger les circuits électriques et en une enceinte 12 dans laquelle débouchent les entrée et sortie 8 et 9. Une membrane qui pourrait être élastique où auquelle l'élasticité requise pourrait être conférée par un ressort et qui, en l'espèce, reçoit son élasticité par une chambre à air 14, s'étend dans l'enceinte en s'appuyant sur une coupelle 15 munie de deux orifices 16 et 17. La coupelle ménage, en outre, autour de l'orifice 17 un manchon 18. Pour permettre de gonfler le compartiment 14 en y introduisant de l'air, il est prévu une valve de prégonflage 19.The device according to the invention is shown in Figure 2. It comprises a body 7 of airtight and water tight plastic. This body is provided with an inlet 8 intended to be connected to the pump 3 and an outlet 9 intended to be connected to the tap 5. The interior of the body is subdivided by a partition 10 into a compartment 11 for housing the circuits electrical and in an enclosure 12 into which open the inlet and outlet 8 and 9. A membrane which could be elastic where auquelle the required elasticity could be imparted by a spring and which, in this case, receives its elasticity by a chamber air 14, extends in the enclosure by resting on a cup 15 provided with two orifices 16 and 17. The cup also provides, around the orifice 17, a sleeve 18. To allow the compartment 14 to be inflated by introducing air into it, a pre-inflation valve 19 is provided.

Une tige 20 est repoussée par la membrane 13 en étant guidée par le manchon. Elle pénètre par son extrémité opposée dans un logement ménagé par un fourreau 21 venu de moulage avec la paroi 10. En une position intermédiaire sur la tige 20, est ménagée une collerette 22 sur laquelle s'appuie l'extrémité d'un ressort 23 hélicoïdal dont l'autre extrémité s'appuie sur un épaulement intérieur 24 du fourreau 21. Dans l'extrémité de la tige 20 opposée à la membrane 13, sont encastrés deux aimants 25. En regard de ces aimants lorsque la tige 20 se trouve enfoncée au maximum dans le fourreau 21, se trouve une cellule à effet Hall 26 soudée à un circuit imprimé 27 constituant le circuit de commande de la pompe 3. La cellule 26 est connectée au circuit imprimé 27 par l'intermédiaire d'un relais 28 de mise hors-tension de la branche du circuit sur lequel est montée la cellule 26 après une durée prescrite, en l'espèce de 6 secondes. La membrane 13 et le compartiment 14 constituent des moyens pour diminuer le volume de l'enceinte 12 quand la pression qui y règne diminue. L'ensemble des pièces 20 à 26 constitue un premier transducteur destiné à mettre sous tension le circuit électrique de commande de la pompe quand le volume de l'enceinte a diminué jusqu'à une valeur donnée, en l'occurence quand la membrane 13 s'applique étroitement à la coupelle 15.A rod 20 is pushed back by the membrane 13 while being guided by the sleeve. It enters by its opposite end into a housing formed by a sheath 21 molded with the wall 10. In an intermediate position on the rod 20, is provided a flange 22 on which the end of a helical spring 23 rests the other end of which rests on an internal shoulder 24 of the sleeve 21. In the end of the rod 20 opposite the membrane 13, two magnets 25 are embedded. Opposite these magnets when the rod 20 is pressed in maximum in the sheath 21, there is a Hall effect cell 26 soldered to a printed circuit 27 constituting the control circuit of the pump 3. The cell 26 is connected to the printed circuit 27 by means of a relay 28 power off of the branch of the circuit on which the cell 26 is mounted after a prescribed time, in this case 6 seconds. The membrane 13 and the compartment 14 constitute means for reducing the volume of the enclosure 12 when the pressure therein decreases. All of the parts 20 to 26 constitute a first transducer intended to energize the electrical circuit controlling the pump when the volume of the enclosure has decreased to a given value, in this case when the membrane 13 s apply tightly to cup 15.

Sur l'embouchure de l'entrée 8 dans l'enceinte 12, est monté un clapet anti-retour 29 comprenant un disque 30 et un poussoir 31 dont l'extrémité libre est logée dans une cavité du fourreau 21 à des fins de guidage. Entre le fourreau 21 et le clapet 30 est monté, autour de la tige 31, un ressort hélicoïdal 32 de rappel. Du pourtour du disque 30 fait saillie une excroissance 33 portant deux aimants 34. A proximité de ces aimants 34 et de l'autre côté de la paroi 10, se trouve une cellule à effet Hall 35 dont les pattes 36 formant branches de connection sont soudées au circuit imprimé 27 servant de circuit de commande de la pompe 3. Un voyant lumineux 37 permet de voir si le circuit 27 est sous tension. Un voyant lumineux 38 permet de voir si la cellule à effet Hall 26 est sous tension. Un voyant lumineux 39 permet de voir si la cellule à effet Hall 35 est sous tension. Un bouton poussoir 40 avec bouton d'aquit permet de mettre le circuit 27 sous tension de l'extérieur indépendamment de la connection des cellules 26 et 35.On the mouth of the inlet 8 in the enclosure 12, is mounted a non-return valve 29 comprising a disc 30 and a pusher 31 whose free end is housed in a cavity of the sleeve 21 for guidance purposes. Between the sheath 21 and the valve 30 is mounted, around the rod 31, a helical return spring 32. From the periphery of the disc 30 protrudes a protrusion 33 carrying two magnets 34. Near these magnets 34 and on the other side of the wall 10, is a Hall effect cell 35 whose legs 36 forming connection branches are welded to the printed circuit 27 serving as a control circuit for the pump 3. An indicator light 37 makes it possible to see if the circuit 27 is energized. An indicator light 38 makes it possible to see if the Hall effect cell 26 is energized. An indicator light 39 makes it possible to see if the Hall effect cell 35 is energized. A push button 40 with exit button enables the circuit 27 to be energized from the outside independently of the connection of cells 26 and 35.

Le dispositif de commande suivant l'invention fonctionne de la manière suivante.The control device according to the invention operates in the following manner.

A la figure 3, la pompe 3 ne fonctionne pas et le robinet 5 est fermé. Le clapet anti-retour 29 est appliqué sur son siège. La tige 20 est en position basse, ce qui signifie que les aimants 25 sont éloignés de la cellule 26. La membrane 13 n'est pas appliquée sur la coupelle 15 de sorte que le volume de l'enceinte 12 est relativement grand. L'eau qui s'y trouve est sous une pression de 3 bar, la pression du compartiment 14 étant bien entendu également de 3 bar.In Figure 3, the pump 3 does not work and the valve 5 is closed. The non-return valve 29 is applied to its seat. The rod 20 is in the low position, which means that the magnets 25 are distant from the cell 26. The membrane 13 is not applied to the cup 15 so that the volume of the enclosure 12 is relatively large. The water therein is under a pressure of 3 bar, the pressure of compartment 14 being of course also 3 bar.

A la figure 4, on a ouvert le robinet 5. La pression dans l'enceinte 12 diminue jusqu'à 1 bar. La membrane 13 tend à s'appliquer contre la coupelle 15 en diminuant le volume de l'enceinte 12. La pression dans le compartiment 14 revient à 1 bar, qui est la pression de prégonflage obtenue par la valve 19, de l'eau passant de l'espace compris entre la membrane 13 et la coupelle 15 dans l'enceinte 12 par le trou 16. La membrane 13 repousse la tige 20 à l'encontre du ressort 23. Les aimants 25 viennent en regard de la cellule 26 et l'excitent. La cellule 26 commande par l'intermédiaire du relais 28 le circuit électrique 27 de commande de la pompe. La pompe 3 fonctionne.In FIG. 4, the tap 5 has been opened. The pressure in the enclosure 12 decreases to 1 bar. The membrane 13 tends to be applied against the cup 15 by reducing the volume of the enclosure 12. The pressure in the compartment 14 comes back to 1 bar, which is the pre-inflation pressure obtained by the valve 19, of the water passing of the space between the membrane 13 and the cup 15 in the enclosure 12 through the hole 16. The membrane 13 pushes the rod 20 against the spring 23. The magnets 25 come opposite the cell 26 and the 'excite. The cell 26 controls via the relay 28 the electrical circuit 27 for controlling the pump. Pump 3 is running.

A la figure 5, la pompe a commencé à débiter. Sous l'effet de la pression fournie par la pompe 3, le clapet 29 s'écarte de son siège en repoussant le ressort 32. Les aimants 34 s'éloignent de la cellule 35 et l'excitent. Celle-ci commande à son tour le circuit électrique 27 en parallèle avec la cellule 26. Immédiatement, la pression dans l'enceinte 12 remonte à 2 bar en fonction de l'ouverture du robinet 5.In Figure 5, the pump has started to flow. Under the effect of the pressure supplied by pump 3, the valve 29 moves away from its seat by pushing the spring 32. The magnets 34 move away from the cell 35 and excite it. This in turn controls the electrical circuit 27 in parallel with the cell 26. Immediately, the pressure in the enclosure 12 rises to 2 bar depending on the opening of the valve 5.

La figure 6 montre l'état de fonctionnement normal de l'installation. Comme la pression dans l'enceinte 12 est de 2 bar, la membrane 13 s'est écartée de la coupelle 15, et la tige 20 n'étant plus repoussée par la membrane, le ressort 23 repousse la collerette 22 sur le bord du manchon 18. Les aimants 25 s'éloignent de la cellule 26 et la désexcitent. Le circuit de commande 27 du moteur reste cependant sous tension en raison de la coopération des aimants 34 et de la cellule 35, l'éloignement des aimants 34 de la cellule 35 faisant que celle-ci met le circuit 27 sous-tension alors que lorsque les aimants 34 sont en regard de la cellule 35 quand le clapet anti-retour 29 est appliqué sur son siège, la cellule cesse de mettre le circuit 27 sous tension.Figure 6 shows the normal operating state of the installation. As the pressure in the enclosure 12 is 2 bar, the membrane 13 has moved away from the cup 15, and the rod 20 no longer being pushed back by the membrane, the spring 23 pushes the flange 22 on the edge of the sleeve 18. The magnets 25 move away from cell 26 and de-energize it. The motor control circuit 27 remains energized, however, due to the cooperation of the magnets 34 and the cell 35, the remoteness of the magnets 34 from the cell 35 causing the latter to energize the circuit 27 while when the magnets 34 are opposite the cell 35 when the non-return valve 29 is applied to its seat, the cell ceases to energize the circuit 27.

A la figure 7, on a fermé le robinet 5. La pression dans l'enceinte 12 remonte à 3. Le clapet anti-retour 29 s'applique à nouveau sur son siège sous l'action du ressort 32.puisque la pression de part et d'autre du clapet est la même. Les aimants 34 viennent à nouveau en face de la cellule 35. Celle-ci met le circuit 27 hors tension. La pompe 3 s'arrête. On retrouve la position de la figure 3 et le dispositif est prêt à effectuer un cycle nouveau.In FIG. 7, the tap 5 has been closed. The pressure in the enclosure 12 goes back to 3. The non-return valve 29 is again applied to its seat under the action of the spring 32. on both sides of the valve is the same. The magnets 34 again come in front of the cell 35. The latter deactivates the circuit 27. Pump 3 stops. We find the position of Figure 3 and the device is ready to perform a new cycle.

A la figure 8, on suppose que l'on se trouve comme à la figure 4 au moment du démarrage de la pompe mais que celle-ci, pour une raison quelconque, ne débite pas. La pression dans l'enceinte 12 reste à 1 bar au lieu de remonter à 2 bar. Le clapet 29 reste fermé puisque la pompe 3 ne débite pas. Au bout de 6 secondes, la cellule 26 cesse, en raison de la présence du relais 28, de mettre le circuit 27 sous tension. La pompe cesse donc de tourner à vide.In FIG. 8, it is assumed that one is as in FIG. 4 at the time of starting the pump but that the latter, for whatever reason, does not deliver. The pressure in the chamber 12 remains at 1 bar instead of rising to 2 bar. The valve 29 remains closed since the pump 3 does not deliver. After 6 seconds, cell 26 stops, due to the presence of relay 28, to energize circuit 27. The pump therefore stops running empty.

Quelque temps plus tard, on suppose que la pompe est alimentée à nouveau en eau ou que la panne a été réparée. Par le bouton poussoir 40 et par le bouton d'aquit 41, on met le circuit 27 sous tension. La pompe 3 fonctionne et débite. Le clapet anti-retour 29 s'ouvre. On se retrouve dans la position de la figure 5.Some time later, it is assumed that the pump is supplied with water again or that the fault has been repaired. By the push button 40 and by the exit button 41, the circuit 27 is energized. Pump 3 operates and delivers. The non-return valve 29 opens. We find ourselves in the position of Figure 5.

Bien entendu, au lieu de cellules à effet Hall on pourrait utiliser également des interrupteurs lames souples ou d'autres éléments transducteurs susceptibles d'ouvrir ou de fermer un circuit électrique en réponse à la détection d'un déplacement.Of course, instead of Hall effect cells one could also use flexible blade switches or other transducer elements capable of opening or closing an electrical circuit in response to the detection of a displacement.

Claims (5)

1. A control arrangement for a water supply installation comprising :
- an air tight and water tight enclosure (12), with an input (8) to be connected to a pump (3) with an electric control circuit (27) by means of a check valve (29), and an outlet (9) to be connected to a user device (5), and which is provided with means (13, 14) for reducing the volume of the enclosure when the pressure which prevails therein decreases, and
- a first transducer for energising the electric control circuit (27) of the pump (3) when the volume in the enclosure (12) is reduced to a predetermined value, characterized in that
- the check valve (29) cooperates with a second transducer (34, 35) for energising the control circuit (27) of the pump when the check valve (29) is open, the two transducers (20-26, 34, 35) being electrically connected in two parallel branches to the electric control circuit (27) of the pump, and
- the first transducer (20-26) is connected to the electrical control circuit (27) of the pump by means of a relay (28) for de-energising its branch after a predetermined time period.
2. The arrangement of claim 1, characterized in that the means for increasing the volume comprise an elastic membrane (13) forming one of the walls of the enclosure.
3. The arrangement of claim 1 or 2, characterized in that the first transducer comprises a rod (20) pushed back by said means (13, 14) for reducing the volume and bearing a position detector component (25) cooperating with a first Hall effect cell (26).
4. Arrangement of claim 1, 2 or 3, characterized in that the second transducer comprises a second position detector component (34), carried by the check valve (29) and cooperating with a second Hall effect cell (35).
5. The arrangement of claim 3 or 4, characterized in that the position detectors are magnets.
EP86401545A 1985-08-21 1986-07-10 Control device for a water supply installation Expired EP0219360B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86401545T ATE44803T1 (en) 1985-08-21 1986-07-10 CONTROL DEVICE FOR A WATER SUPPLY SYSTEM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8512573A FR2586457B1 (en) 1985-08-21 1985-08-21 DEVICE FOR CONTROLLING A WATER SUPPLY INSTALLATION
FR8512573 1985-08-21

Publications (2)

Publication Number Publication Date
EP0219360A1 EP0219360A1 (en) 1987-04-22
EP0219360B1 true EP0219360B1 (en) 1989-07-19

Family

ID=9322319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401545A Expired EP0219360B1 (en) 1985-08-21 1986-07-10 Control device for a water supply installation

Country Status (7)

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EP (1) EP0219360B1 (en)
JP (1) JPS6350697A (en)
AT (1) ATE44803T1 (en)
DE (1) DE3664513D1 (en)
ES (1) ES8707588A1 (en)
FR (1) FR2586457B1 (en)
PT (1) PT83216B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2006279A6 (en) * 1987-12-18 1989-04-16 Banus Garcia Fernando Apparatus for controlling start up and stop down of a hydraulic pump.
IT1251968B (en) * 1991-10-21 1995-05-27 Watertech Srl APPARATUS TO CONTROL THE STARTING AND STOPPING OF A WATER DISTRIBUTION NETWORK PUMP.
IT1286618B1 (en) * 1996-05-03 1998-07-15 Lapa Services S R L DEVICE FOR CONTROLING THE SUPPLY OF WATER (OR OTHER LIQUID) BY MEANS OF A PUMP AND FOR PROTECTING THE SAME IN THE EVENT OF
IT1295577B1 (en) * 1997-02-13 1999-05-13 Hydroservice S R L DEVICE FOR CONTROL OF A HYDRAULIC PUMP, WITH SELF-ADJUSTING COMPUTER PROPORTIONAL CONTROL
ES2149667B1 (en) * 1997-11-04 2001-04-16 Garcia Fernando Banus APPARATUS FOR THE CONTROL OF THE STARTING AND STOPPING OF A HYDRAULIC PUMP.
ES2177371B1 (en) * 1999-11-11 2004-09-16 Bogemar, S.L. PRESSURE REGULATOR FOR A WATER IMPULSION INSTALLATION THROUGH THE PUMP.
ITFI20030144A1 (en) * 2003-05-23 2004-11-24 Enrico Raddi AUTOCLAVE GROUP OF SMALL BOOM, FOR PLANTS
ITFI20030264A1 (en) * 2003-10-17 2005-04-18 Mac 3 S P A DEVICE FOR THE AUTOMATIC CONTROL OF A HYDRAULIC PUMP.
JP4858102B2 (en) * 2006-11-14 2012-01-18 富士ゼロックス株式会社 Sheet waste processing apparatus and image forming apparatus using the same
IT1398617B1 (en) * 2008-12-04 2013-03-08 Raddi A REGULATOR UNIT TO PILOT A POWER PUMP OF A LOCAL DISTRIBUTION NETWORK OF A LIQUID

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146007B (en) * 1959-02-25 1963-03-21 Odd Fredheim Johnsen Water supply system
FR90551E (en) * 1961-10-06 1968-01-05 Improvement in distribution installations for a liquid supplied by a motor-driven pump and resulting devices
US4124331A (en) * 1976-12-30 1978-11-07 Hitachi, Ltd. Automatic control systems for a well pump installation

Also Published As

Publication number Publication date
DE3664513D1 (en) 1989-08-24
PT83216B (en) 1992-10-30
FR2586457B1 (en) 1989-06-23
FR2586457A1 (en) 1987-02-27
PT83216A (en) 1986-09-01
JPS6350697A (en) 1988-03-03
ATE44803T1 (en) 1989-08-15
EP0219360A1 (en) 1987-04-22
ES8707588A1 (en) 1987-08-16
ES556941A0 (en) 1987-08-16

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