EP0927826B1 - Liquid pumping system - Google Patents

Liquid pumping system Download PDF

Info

Publication number
EP0927826B1
EP0927826B1 EP98460059A EP98460059A EP0927826B1 EP 0927826 B1 EP0927826 B1 EP 0927826B1 EP 98460059 A EP98460059 A EP 98460059A EP 98460059 A EP98460059 A EP 98460059A EP 0927826 B1 EP0927826 B1 EP 0927826B1
Authority
EP
European Patent Office
Prior art keywords
opening
liquid
chamber
evacuation
valve
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.)
Expired - Lifetime
Application number
EP98460059A
Other languages
German (de)
French (fr)
Other versions
EP0927826A1 (en
Inventor
André Le Grouyellec
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR9716884A external-priority patent/FR2774728A1/en
Application filed by Individual filed Critical Individual
Publication of EP0927826A1 publication Critical patent/EP0927826A1/en
Application granted granted Critical
Publication of EP0927826B1 publication Critical patent/EP0927826B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
    • F04F1/02—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped using both positively and negatively pressurised fluid medium, e.g. alternating

Definitions

  • the present invention relates to a liquid pumping system.
  • Such pumping system can work in pump with various liquids.
  • An application such a pumping system may consist of a liquid gun, such as water, can project a liquid at a long distance at a controllable rate, for example, for watering crops or as a water cannon fire or riot.
  • centrifugal pumps are generally used which are coupled to a heat engine.
  • the disadvantage of such pumps is that they require a relatively high power.
  • a centrifugal pump that delivers 1300 liters / minute at a pressure of 12 bar requires an engine power thermal that leads to 120 hp.
  • Document NL 6 615 555 discloses a pumping system of a liquid.
  • the system consists of a chamber in which the liquid is introduced to through an introduction port from a source.
  • the system also includes a evacuation port and an orifice opposite to the evacuation port for the introduction of pressurized air from a tank.
  • valves which are controlled synchronized.
  • the valve associated with the orifice When filling the tank the valve associated with the orifice is opened while the other two valves are closed thus filling the chamber.
  • expelling the valve associated with the orifice When expelling the valve associated with the orifice is closed while the other two valves are open, allowing introducing the gas under pressure into the chamber through the air introduction port under pressure, thus expelling the liquid contained in the chamber through the orifice discharge.
  • the air contained in the tank hampers the filling the tank.
  • the object of the invention is to propose a system for pumping liquids which does not have the disadvantages of the prior art.
  • the object of the invention is to propose a system for pumping liquids which significantly reduce this power required for a projection said liquid, for example in a ratio of 8 to 10 and to improve the filling of the tank.
  • a system for pumping a liquid is characterized in that it consists of a chamber provided with an insertion orifice in said a chamber of a liquid from a source, an orifice for evacuation of said liquid out of said chamber and a port opposite said discharge port of said liquid for the introduction of gas under pressure, each orifice being provided with a valve, said valves being controlled synchronously in two phases, a first so-called filling phase in which the valve associated with the orifice is opened while the other two valves are closed thus the filling of the chamber, and a second so-called expulsion phase in which the valve associated with the introduction orifice is closed while the other two valves are open, allowing the introduction of pressurized gas into the chamber by the orifice opposite said discharge orifice thus expelling the liquid contained in the chamber through the evacuation port.
  • the pumping system is characterized in that said chamber is provided with a vent opposite the liquid introduction orifice, said vent being itself provided with a valve which opens and closes at the same
  • valve associated with the orifice of introduction is at the end of said chamber which is provided with the orifice discharge, said vent being at the other end.
  • the invention comprises means for detecting levels of liquid in said chamber whose signals are provided to a control unit provided to be able to control the opening and closing said valves.
  • said chamber presents its discharge orifice, a frustoconical portion tightening towards said orifice discharge.
  • the present invention also relates to a set of pumping systems in accordance with a pumping system as just described. According to the invention, is characterized in that each system is controlled so that the phases each evacuation system follow one after the other, and while that of a system is implemented, filling phases are set implemented in other systems.
  • the number n of systems evacuation of said assembly is such that n times the evacuation time correspond to a filling time.
  • the installation shown in FIG. 1 is essentially a system according to the invention 100, a source 20 of a liquid and a pump of compression 30 for supplying gas under relatively high pressure.
  • this gas is air.
  • the pumping system 100 visible in this FIG. 1 is essentially constituted of a body forming in its interior a closed chamber 10, for example but not necessarily cylindrical.
  • Said body 10 is provided with an orifice 11 provided for introducing the liquid from the source 20 into said chamber of the body 10 and a orifice 12 for evacuation from said chamber of the body 10 of the liquid it contains.
  • the introduction orifice 11 and the orifice 12 are located in the lower part of the body 10, which has its axis longitudinal which is vertical.
  • This body 10 is further provided with an orifice 13 which is opposite to said orifice discharge of said liquid 12 and which is intended to allow the introduction into the body chamber 10 of the high pressure gas supplied by the pump compression 30.
  • the body 10 is also provided with a vent 14 which is opposite to the introduction orifice 12.
  • the pumping system 100 further comprises a valve 15 placed on the channel between the source 20 and the introduction orifice 11, a valve 16 placed on the discharge orifice 12, a valve 17 placed on the pipe between the pump 30 and the introduction orifice 13 and a valve 18 placed on the vent 14.
  • the valves 15 to 18 are synchronously controlled by means of a control unit 40 which receives the signals, on the one hand, from a low level detector 42 and, on the other hand, from a high level detector 41.
  • the operation of the pumping system 100 according to the invention is as follows.
  • a first phase called the filling phase
  • the filling phase the filling the chamber of the body 10 with a volume of liquid from the source 20.
  • the introduction valve 15 and the vent valve 18 are opened, the valve gas introduction 13 and the discharge valve 16 being closed.
  • the resulting liquid of the source 20 enters by gravity into the chamber of the body 10, and this via the orifice 11.
  • the filling is done until the liquid reaches the level of detector 41, which transmits a signal to the control unit 40 which triggers the closing valves 15 and 18.
  • vent 14 serves to evacuate the air that is expelled from the chamber of the body 10 by filling it with liquid.
  • the introduction valve of gas 17 is open as well as the discharge valve 16. This results in the presence at the the surface of the liquid which is opposed to the orifice 12, of a gas pressure given by the pump 30 which has the effect of pressing on this surface and to allow the evacuation of the liquid through the orifice 12.
  • the liquid is expelled and projected in the form of a jet of strong power.
  • valves 16 and 17 open immediately closing valves 15 and 18.
  • the opening of the valve 16 may be slightly delayed by relative to the opening of the valve 17.
  • the vent 14 is replaced by an orifice 14 connected via the valve 18, to a suction pump 50.
  • the operation is similar to that of the embodiment shown in FIG. 1, with the difference that the introduction the liquid from the source 20 is no longer by gravity but by making a vacuum in the chamber of the body 10 by means of the suction pump 50.
  • the detectors 41 and 42 could be replaced by a pressure switch which, when the pressure in the body 10 reaches by setting a limit value higher, allows the control of the closing of the valves 15 and 18 and which, when the pressure in the body 10 reached by going down a lower limit value, allows the control of the closure of the valves 16 and 17.
  • FIG. 3 a body 10 of a pumping system according to the invention with its introduction ports 11 and 13 and its discharge port 12 and its vent (or suction port) 14.
  • This body 10 has the particularity of understanding in its lower part, a frustoconical portion 10a tightening towards the orifice 12. It has been shown that this characteristic was of interest for obtain a fine spray at the end of the jet due to the mixing of water and gas that takes place at the end of evacuation.
  • FIG. 4 there is shown an installation with n pumping systems 10 1 to 10 n identical to the first embodiment shown in FIG. 1. It should be noted, however, that said systems could be identical to the second embodiment of FIG. 2. In this FIG. 4, the valves 15 to 18 of each system 10l to 10n have not been shown for the sake of clarity in FIG. 4.
  • the source 20 is therefore connected to the n input inputs 11 of the n pumping systems 10 1 to 10 n , and this via n respective valves 15 (see Fig. 1).
  • the compression pump 30 is connected to the n pressurized gas introduction inlets 13 of the n pumping systems 10 1 to 10 n , via n respective valves 17 (see Fig. 1) and the n exhaust ports 12 are connected to an outlet S.
  • the system 101 begins to fill, the system 102 evacuates and the system 103 finishes filling.
  • the system 101 always fills, the system 102 has finished the evacuation and begins to fill up and the 103 system starts evacuation.
  • the system 101 finishes filling and begins evacuation, the system 102 is still filling and the system 103 has finished the evacuation and begins its filling.

Abstract

The system comprises a chamber with an inlet (11) for a liquid from a source (20), an outlet (12), and an inlet (13) for a pressurised gas, each with a valve (15, 16, 17). The valves are controlled synchronously in two phases - an intake phase in which the liquid inlet valve (15) is open and the other two valves are closed, and an expulsion phase in which the inlet valve is closed and the other two valves are open, allowing gas under pressure into the chamber to expel the liquid. The chamber can also have a duct (14) at the opposite end to the inlet, connected to a vacuum pump via a valve (18) that opens at the same time as the inlet control valve (15).

Description

La présente invention concerne un système de pompage de liquide. Un tel système de pompage peut travailler en pompe avec divers liquides. Une application d'un tel système de pompage peut consister en un canon à liquide, tel que de l'eau, pouvant projeter à forte distance un liquide à un rythme contrôlable, par exemple, pour l'arrosage de cultures ou comme canon à eau d'incendie ou anti-émeutes.The present invention relates to a liquid pumping system. Such pumping system can work in pump with various liquids. An application such a pumping system may consist of a liquid gun, such as water, can project a liquid at a long distance at a controllable rate, for example, for watering crops or as a water cannon fire or riot.

Pour projeter un liquide, on utilise généralement des pompes centrifuges qui sont couplées à un moteur thermique. L'inconvénient de telles pompes est qu'elles nécessitent une relativement forte puissance. Par exemple, une pompe centrifuge qui débite 1300 litres/minute à une pression de 12 bars demande une puissance du moteur thermique qui l'entraíne de 120 CV. To project a liquid, centrifugal pumps are generally used which are coupled to a heat engine. The disadvantage of such pumps is that they require a relatively high power. For example, a centrifugal pump that delivers 1300 liters / minute at a pressure of 12 bar requires an engine power thermal that leads to 120 hp.

On connaít le document NL 6 615 555 qui décrit un système de pompage d'un liquide. Le système est constitué d'une chambre dans laquelle le liquide est introduit à travers un orifice d'introduction à partir d'une source. Le système comprend aussi un orifice d'évacuation et un orifice opposé à l'orifice d'évacuation pour l'introduction d'air sous pression à partir d'un réservoir.Document NL 6 615 555 discloses a pumping system of a liquid. The system consists of a chamber in which the liquid is introduced to through an introduction port from a source. The system also includes a evacuation port and an orifice opposite to the evacuation port for the introduction of pressurized air from a tank.

Ces orifices sont pourvus de vannes qui sont commandées de manière synchronisée. Lors du remplissage du réservoir la vanne associée à l'orifice d'introduction est ouverte alors que les deux autres vannes sont fermées permettant ainsi le remplissage de la chambre. Lors de l'expulsion la vanne associée à l'orifice d'introduction est fermée alors que les deux autres vannes sont ouvertes, permettant l'introduction du gaz sous pression dans la chambre par l'orifice d'introduction de l'air sous pression, expulsant ainsi le liquide contenu dans la chambre par l'orifice d'évacuation.These ports are provided with valves which are controlled synchronized. When filling the tank the valve associated with the orifice is opened while the other two valves are closed thus filling the chamber. When expelling the valve associated with the orifice is closed while the other two valves are open, allowing introducing the gas under pressure into the chamber through the air introduction port under pressure, thus expelling the liquid contained in the chamber through the orifice discharge.

Durant la phase d'introduction, l'air contenu dans le réservoir gêne le remplissage du réservoir.During the introduction phase, the air contained in the tank hampers the filling the tank.

Le but de l'invention est de proposer un système de pompage de liquides qui ne présente pas les inconvénients de l'art antérieur.The object of the invention is to propose a system for pumping liquids which does not have the disadvantages of the prior art.

Le but de l'invention est de proposer un système de pompage de liquides qui permette de réduire considérablement cette puissance requise pour une projection dudit liquide, par exemple dans un rapport de 8 à 10 et d'améliorer le remplissage du réservoir.The object of the invention is to propose a system for pumping liquids which significantly reduce this power required for a projection said liquid, for example in a ratio of 8 to 10 and to improve the filling of the tank.

A cet effet, un système de pompage d'un liquide selon l'invention est caractérisé en ce qu'il est constitué d'une chambre pourvue d'un orifice d'introduction dans ladite chambre d'un liquide issu d'une source, d'un orifice pour l'évacuation dudit liquide hors de ladite chambre et d'un orifice opposé audit orifice d'évacuation dudit liquide pour l'introduction de gaz sous pression, chaque orifice étant pourvu d'une vanne, lesdites vannes étant commandées de manière synchronisée selon deux phases, une première phase dite de remplissage dans laquelle la vanne associée à l'orifice d'introduction est ouverte alors que les deux autres vannes sont fermées permettant ainsi le remplissage de la chambre, et une seconde phase dite d'expulsion dans laquelle la vanne associée à l'orifice d'introduction est fermée alors que les deux autres vannes sont ouvertes, permettant l'introduction du gaz sous pression dans la chambre par l'orifice opposé audit orifice d'évacuation expulsant ainsi le liquide contenu dans la chambre par l'orifice d'évacuation. Le système de pompage est caractérisé en ce que ladite chambre est pourvu d'un évent à l'opposé de l'orifice d'introduction du liquide, ledit évent étant lui-même pourvu d'une vanne qui s'ouvre et se ferme en même temps que la vanne associée à l'orifice d'introduction du liquide.For this purpose, a system for pumping a liquid according to the invention is characterized in that it consists of a chamber provided with an insertion orifice in said a chamber of a liquid from a source, an orifice for evacuation of said liquid out of said chamber and a port opposite said discharge port of said liquid for the introduction of gas under pressure, each orifice being provided with a valve, said valves being controlled synchronously in two phases, a first so-called filling phase in which the valve associated with the orifice is opened while the other two valves are closed thus the filling of the chamber, and a second so-called expulsion phase in which the valve associated with the introduction orifice is closed while the other two valves are open, allowing the introduction of pressurized gas into the chamber by the orifice opposite said discharge orifice thus expelling the liquid contained in the chamber through the evacuation port. The pumping system is characterized in that said chamber is provided with a vent opposite the liquid introduction orifice, said vent being itself provided with a valve which opens and closes at the same time that the valve associated with the liquid introduction port.

Selon une autre caractéristique de l'invention, la vanne associée à l'orifice d'introduction se trouve à l'extrémité de ladite chambre qui est pourvue de l'orifice d'évacuation, ledit évent se trouvant à l'autre extrémité.According to another characteristic of the invention, the valve associated with the orifice of introduction is at the end of said chamber which is provided with the orifice discharge, said vent being at the other end.

Selon une autre caractéristique de l'invention, il comporte des moyens de détection de niveaux de liquide dans ladite chambre dont les signaux sont fournis à une unité de commande prévue pour pouvoir commander l'ouverture et la fermeture desdites vannes.According to another characteristic of the invention, it comprises means for detecting levels of liquid in said chamber whose signals are provided to a control unit provided to be able to control the opening and closing said valves.

Selon une autre caractéristique de l'invention, ladite chambre présente, côté de son orifice d'évacuation, une partie tronconique se resserrant vers ledit orifice d'évacuation.According to another characteristic of the invention, said chamber presents its discharge orifice, a frustoconical portion tightening towards said orifice discharge.

La présente invention concerne également un ensemble de systèmes de pompage conformes à un système de pompage tel qu'il vient d'être décrit. Selon l'invention, il est caractérisé en ce que chaque système est commandé de manière que les phases d'évacuation de chaque système d'évacuation se suivent les unes après les autres, et que pendant que celle d'un système est en oeuvre, des phases de remplissage sont mises en oeuvre dans les autres systèmes.The present invention also relates to a set of pumping systems in accordance with a pumping system as just described. According to the invention, is characterized in that each system is controlled so that the phases each evacuation system follow one after the other, and while that of a system is implemented, filling phases are set implemented in other systems.

Selon une autre caractéristique de cet ensemble, le nombre n de systèmes d'évacuation dudit ensemble est tel que n fois le temps d'évacuation correspondent à un temps de remplissage.According to another characteristic of this set, the number n of systems evacuation of said assembly is such that n times the evacuation time correspond to a filling time.

Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaítront plus clairement à la lecture de la description suivante d'un exemple de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels :

  • la Fig. 1 est un schéma montrant une installation de pompage d'eau utilisant un système de pompage selon l'invention,
  • la Fig. 2 est un schéma montrant une installation de pompage d'eau utilisant un système de pompage selon une variante de l'invention,
  • la Fig. 3 montre un schéma d'un corps d'un système de pompage selon l'invention dans un mode particulier de réalisation,
  • la Fig. 4 est un schéma d'un ensemble de systèmes de pompage selon l'invention, et
  • la Fig. 5 est un diagramme illustrant le fonctionnement d'un ensemble conforme à celui de la Fig. 4.
    • The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being given in relation to the attached drawings, among which:
  • FIG. 1 is a diagram showing a water pumping installation using a pumping system according to the invention,
  • FIG. 2 is a diagram showing a water pumping installation using a pumping system according to a variant of the invention,
  • FIG. 3 shows a diagram of a body of a pumping system according to the invention in a particular embodiment,
  • FIG. 4 is a diagram of a set of pumping systems according to the invention, and
  • FIG. 5 is a diagram illustrating the operation of an assembly according to that of FIG. 4.

    • L'installation représentée à la Fig. 1 est essentiellement constituée d'un système de pompage selon l'invention 100, d'une source 20 d'un liquide et d'une pompe de compression 30 destinée à fournir un gaz sous relativement haute pression. Par exemple, ce gaz est de l'air.The installation shown in FIG. 1 is essentially a system according to the invention 100, a source 20 of a liquid and a pump of compression 30 for supplying gas under relatively high pressure. By for example, this gas is air.

    Le système de pompage 100 visible sur cette Fig. 1 est essentiellement constitué d'un corps formant en son intérieur une chambre 10 fermée, par exemple mais pas nécessairement cylindrique. Ledit corps 10 est pourvu d'un orifice 11 prévu pour l'introduction du liquide de la source 20 dans ladite chambre du corps 10 et d'un orifice 12 pour l'évacuation hors de ladite chambre du corps 10 du liquide qu'elle contient. Dans l'exemple de réalisation représenté, l'orifice d'introduction 11 et l'orifice d'évacuation 12 se trouvent dans la partie inférieure du corps 10, lequel a son axe longitudinal qui est vertical.The pumping system 100 visible in this FIG. 1 is essentially constituted of a body forming in its interior a closed chamber 10, for example but not necessarily cylindrical. Said body 10 is provided with an orifice 11 provided for introducing the liquid from the source 20 into said chamber of the body 10 and a orifice 12 for evacuation from said chamber of the body 10 of the liquid it contains. In the embodiment shown, the introduction orifice 11 and the orifice 12 are located in the lower part of the body 10, which has its axis longitudinal which is vertical.

    Ce corps 10 est encore pourvu d'un orifice 13 qui est opposé audit orifice d'évacuation dudit liquide 12 et qui est prévu pour permettre l'introduction dans la chambre du corps 10 du gaz sous haute pression fourni par la pompe de compression 30. This body 10 is further provided with an orifice 13 which is opposite to said orifice discharge of said liquid 12 and which is intended to allow the introduction into the body chamber 10 of the high pressure gas supplied by the pump compression 30.

    Le corps 10 est également pourvu d'un évent 14 qui se trouve à l'opposé de l'orifice d'introduction 12.The body 10 is also provided with a vent 14 which is opposite to the introduction orifice 12.

    Le système de pompage 100 comporte encore une vanne 15 placée sur la canalisation entre la source 20 et l'orifice d'introduction 11, une vanne 16 placée sur l'orifice d'évacuation 12, une vanne 17 placée sur la canalisation entre la pompe 30 et l'orifice d'introduction 13 et une vanne 18 placée sur l'évent 14. Les vannes 15 à 18 sont commandées en synchronisme au moyen d'une unité de commande 40 qui reçoit par ailleurs les signaux, d'une part, d'un détecteur de niveau bas 42 et, d'autre part, d'un détecteur de niveau haut 41.The pumping system 100 further comprises a valve 15 placed on the channel between the source 20 and the introduction orifice 11, a valve 16 placed on the discharge orifice 12, a valve 17 placed on the pipe between the pump 30 and the introduction orifice 13 and a valve 18 placed on the vent 14. The valves 15 to 18 are synchronously controlled by means of a control unit 40 which receives the signals, on the one hand, from a low level detector 42 and, on the other hand, from a high level detector 41.

    Le fonctionnement du système de pompage 100 selon l'invention est le suivant.The operation of the pumping system 100 according to the invention is as follows.

    Dans une première phase appelée phase de remplissage, on effectue le remplissage de la chambre du corps 10 avec un volume de liquide issu de la source 20. Pour ce faire, on ouvre la vanne d'introduction 15 et la vanne de l'évent 18, la vanne d'introduction de gaz 13 et la vanne d'évacuation 16 étant elles fermées. Le liquide issu de la source 20 entre par gravité dans la chambre du corps 10, et ce via l'orifice d'introduction 11. Le remplissage se fait jusqu'à ce que le liquide atteigne le niveau du détecteur haut 41, lequel transmet un signal à l'unité de commande 40 qui déclenche la fermeture des vannes 15 et 18.In a first phase called the filling phase, the filling the chamber of the body 10 with a volume of liquid from the source 20. To do this, the introduction valve 15 and the vent valve 18 are opened, the valve gas introduction 13 and the discharge valve 16 being closed. The resulting liquid of the source 20 enters by gravity into the chamber of the body 10, and this via the orifice 11. The filling is done until the liquid reaches the level of detector 41, which transmits a signal to the control unit 40 which triggers the closing valves 15 and 18.

    On notera que l'évent 14 sert à l'évacuation de l'air qui est chassé de la chambre du corps 10 par son remplissage de liquide.It will be noted that the vent 14 serves to evacuate the air that is expelled from the chamber of the body 10 by filling it with liquid.

    Dans une seconde phase appelée phase d'évacuation, la vanne d'introduction de gaz 17 est ouverte ainsi que la vanne d'évacuation 16. Il en résulte la présence à la surface du liquide qui est opposée à l'orifice 12, d'une pression de gaz donnée par la pompe 30 qui a pour effet d'appuyer sur cette surface et de permettre l'évacuation du liquide par l'orifice 12. Le liquide est expulsé et projeté sous la forme d'un jet de forte puissance.In a second phase called the evacuation phase, the introduction valve of gas 17 is open as well as the discharge valve 16. This results in the presence at the the surface of the liquid which is opposed to the orifice 12, of a gas pressure given by the pump 30 which has the effect of pressing on this surface and to allow the evacuation of the liquid through the orifice 12. The liquid is expelled and projected in the form of a jet of strong power.

    On notera que, selon un mode préféré, la seconde phase commence aussitôt après la fin de la première phase. En conséquence, les vannes 16 et 17 s'ouvrent aussitôt la fermeture des vannes 15 et 18.It will be noted that, in a preferred mode, the second phase begins immediately after the end of the first phase. As a result, valves 16 and 17 open immediately closing valves 15 and 18.

    On notera que l'ouverture de la vanne 16 peut légèrement être retardée par rapport à l'ouverture de la vanne 17.It should be noted that the opening of the valve 16 may be slightly delayed by relative to the opening of the valve 17.

    Lorsque le niveau de liquide correspond à celui du détecteur bas 42, un signal est transmis à l'unité de commande 40 qui déclenche la fermeture des vannes 16 et 17. L'unité de commande 40 peut alors déclencher de nouveau la première phase du processus.When the liquid level corresponds to that of the low detector 42, a signal is transmitted to the control unit 40 which triggers the closing of the valves 16 and 17. The control unit 40 can then re-trigger the first phase of the process.

    Avec un tel système, la puissance consommée nécessaire à son fonctionnement a été de l'ordre de 11 CV alors que, pour avoir des mêmes performances de pression et de débit du jet d'eau obtenu une puissance de 120 CV est nécessaire avec une pompe centrifuge.With such a system, the power consumed necessary for its operation has been of the order of 11 CV whereas, to have the same performance of pressure and flow rate of water jet obtained a power of 120 hp is required with a pump centrifugal.

    Dans l'exemple de réalisation de la Fig. 2, l'évent 14 est remplacé par un orifice 14 relié, via la vanne 18, à une pompe d'aspiration 50. Le fonctionnement est similaire à celui de l'exemple de réalisation représenté à la Fig. 1, à la différence que l'introduction du liquide de la source 20 ne se fait plus par gravité mais en effectuant un vide dans la chambre du corps 10 au moyen de la pompe d'aspiration 50.In the exemplary embodiment of FIG. 2, the vent 14 is replaced by an orifice 14 connected via the valve 18, to a suction pump 50. The operation is similar to that of the embodiment shown in FIG. 1, with the difference that the introduction the liquid from the source 20 is no longer by gravity but by making a vacuum in the chamber of the body 10 by means of the suction pump 50.

    On notera encore qu'on pourrait remplacer les détecteurs 41 et 42 par un pressostat qui, lorsque la pression dans le corps 10 atteint en montant une valeur limite supérieure, permet la commande de la fermeture des vannes 15 et 18 et qui, lorsque la pression dans le corps 10 atteint en descendant une valeur limite inférieure, permet la commande de la fermeture des vannes 16 et 17.It should be noted that the detectors 41 and 42 could be replaced by a pressure switch which, when the pressure in the body 10 reaches by setting a limit value higher, allows the control of the closing of the valves 15 and 18 and which, when the pressure in the body 10 reached by going down a lower limit value, allows the control of the closure of the valves 16 and 17.

    On a représenté à la Fig. 3, un corps 10 d'un système de pompage selon l'invention avec ses orifices d'introduction 11 et 13 et son orifice d'évacuation 12 et son évent (ou orifice d'aspiration) 14. Ce corps 10 présente la particularité de comprendre dans sa partie inférieure, une partie tronconique 10a se resserrant vers l'orifice d'évacuation 12. On a pu montrer que cette caractéristique était intéressante pour obtenir une pulvérisation fine en fin de jet du fait du mélange d'eau et de gaz qui a lieu en fin d'évacuation.It is shown in FIG. 3, a body 10 of a pumping system according to the invention with its introduction ports 11 and 13 and its discharge port 12 and its vent (or suction port) 14. This body 10 has the particularity of understanding in its lower part, a frustoconical portion 10a tightening towards the orifice 12. It has been shown that this characteristic was of interest for obtain a fine spray at the end of the jet due to the mixing of water and gas that takes place at the end of evacuation.

    A la Fig. 4, on a représenté une installation à n systèmes de pompage 10l à 10n identiques au premier mode de réalisation représenté à la Fig. 1. On notera cependant que lesdits systèmes pourraient être identiques au second mode de réalisation de la Fig. 2. Dans cette Fig. 4, les vannes 15 à 18 de chaque système 10l à 10n n'ont pas été représentées pour des raisons de clarté de la Fig. 4.In FIG. 4, there is shown an installation with n pumping systems 10 1 to 10 n identical to the first embodiment shown in FIG. 1. It should be noted, however, that said systems could be identical to the second embodiment of FIG. 2. In this FIG. 4, the valves 15 to 18 of each system 10l to 10n have not been shown for the sake of clarity in FIG. 4.

    La source 20 est donc reliée aux n entrées d'introduction 11 des n systèmes de pompage 10l à 10n, et ce via n vannes 15 respectives (voir Fig. 1). De même, la pompe de compression 30 est reliée aux n entrées d'introduction de gaz sous pression 13 des n systèmes de pompage 10l à 10n, et ce via n vannes 17 respectives (voir Fig. 1) et les n orifices d'évacuation 12 sont reliés à une sortie S. On remarquera les évents 14 qui sont eux aussi reliés à des vannes respectives 18 (voir Fig. 1). The source 20 is therefore connected to the n input inputs 11 of the n pumping systems 10 1 to 10 n , and this via n respective valves 15 (see Fig. 1). Similarly, the compression pump 30 is connected to the n pressurized gas introduction inlets 13 of the n pumping systems 10 1 to 10 n , via n respective valves 17 (see Fig. 1) and the n exhaust ports 12 are connected to an outlet S. There will be noticed the vents 14, which are also connected to respective valves 18 (see Fig. 1).

    L'unité de commande 40 commande chaque système 10i (i pouvant varier de 1 à n) de la manière indiquée ci-dessus, c'est-à-dire selon deux phases, une phase de remplissage I et une phase d'évacuation II, phases qui sont déclenchées et interrompues après réception des signaux de niveau issus des détecteurs 41 et 42 de chaque système 10i. A la Fig. 5, on a représenté comment ces phases I et II se déroulent dans le temps pour chaque système de pompage d'une installation qui en comporte 3 (n = 3). On remarque, sur cette Fig. 5, que la durée de la phase de remplissage I est plus importante que celle de la phase d'évacuation II.The control unit 40 controls each system 10i (i which may vary from 1 to n) in the manner indicated above, that is to say in two phases, a filling phase I and an evacuation phase II. phases that are triggered and interrupted after receiving the level signals from the detectors 41 and 42 of each system 10i. In FIG. 5, it is shown how these phases I and II take place over time for each pumping system of an installation which has 3 ( n = 3). Note in this Fig. 5, that the duration of the filling phase I is greater than that of the evacuation phase II.

    Au temps t0, le système 101 commence à se remplir, le système 102 évacue et le système 103 finit de se remplir. Au temps t1, le système 101 se remplit toujours, le système 102 a fini l'évacuation et commence à se remplir et le système 103 commence l'évacuation. Au temps t2, le système 101 finit de se remplir et commence l'évacuation, le système 102 se remplit toujours et le système 103 a fini l'évacuation et commence son remplissage.At time t0, the system 101 begins to fill, the system 102 evacuates and the system 103 finishes filling. At time t1, the system 101 always fills, the system 102 has finished the evacuation and begins to fill up and the 103 system starts evacuation. At time t2, the system 101 finishes filling and begins evacuation, the system 102 is still filling and the system 103 has finished the evacuation and begins its filling.

    On constate que les phases d'évacuation II se suivent les unes après les autres, et que pendant que celle d'un système est en oeuvre, des phases de remplissage sont mises en oeuvre dans les autres systèmes. Avantageusement, on choisira un nombre n de systèmes tels que n fois la durée de la phase d'évacuation II correspondent à celle de la phase de remplissage I. En effet, dans ce cas, le débit sur la sortie S est sensiblement constant.It is found that the evacuation phases II follow one after the other, and that while that of a system is implemented, filling phases are implemented in the other systems. Advantageously, one will choose a number n of systems such that n times the duration of the evacuation phase II correspond to that of the filling phase I. Indeed, in this case, the flow rate on the output S is substantially constant.

    Claims (6)

    1. Liquid pumping system comprising a chamber (10) fitted with an opening (11) for the insertion into the said chamber (10) of a liquid originating from a source (20), an opening (12) for the evacuation of the said liquid out of the said chamber (10) and an opening (13) opposite the said opening (12) for evacuating the said liquid for the insertion of gas under pressure, each opening (11, 12, 13) being fitted with a valve (15, 16, 17), the said valves (15, 16, 17) being controlled in a synchronised way in two phases, an initial phase (I) known as filling in which the valve (15) associated with the insertion opening (11) is open while the other two valves (16 and 17) are closed, thus enabling the chamber (10) to be filled, and a second phase known as expulsion in which the valve (15) associated with the insertion opening (11) is closed while the other two valves (16 and 17) are open, enabling gas to be inserted under pressure into the chamber (10) through the opening (13) opposite the said evacuation opening (12), thus expelling the liquid contained in the chamber (10) through the evacuation opening (12), characterised in that the said chamber (10) is fitted with a vent (14) opposite the opening (11) for insertion of the liquid, the said vent (14) being itself fitted with a valve (18) which opens and closes at the same time as the valve (15) associated with the opening (11) for insertion of the liquid.
    2. Liquid pumping system according to claim 1, characterised in that the valve (15) associated with the insertion opening (11) is positioned at the end of the said chamber (10) which is fitted with the evacuation opening (12), the said vent (14) being positioned at the other end.
    3. Liquid pumping system according to one of the preceding claims, characterised in that it includes means of detecting (41 and 42) levels of liquid in the said chamber (10) the signals from which are passed to a control unit (40), which is provided so as to be able to control the opening and closing of the said valves (15 to 17).
    4. Liquid pumping system according to one of the preceding claims, characterised in that the said chamber (10) presents, on its evacuation opening (12) side, a truncated section (10a) narrowing towards the said evacuation opening (12).
    5. Set of pumping systems conforming with a pumping system according to one of the preceding claims, characterised in that each system is controlled so that the evacuation phases (II) of each evacuation system follow on one after another and that, when that of one system is in operation, the filling phases (I) are put into operation in the other systems.
    6. Set according to claim 5, characterised in that the number n of evacuation systems of the said set is such that n times the duration of the evacuation phase (II) corresponds to that of filling phase I.
    EP98460059A 1997-12-31 1998-12-18 Liquid pumping system Expired - Lifetime EP0927826B1 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    FR9716884A FR2774728A1 (en) 1997-12-31 1997-12-31 Liquid pumping system
    FR9716884 1997-12-31
    FR9806130A FR2774729B1 (en) 1997-12-31 1998-05-11 LIQUID PUMPING SYSTEM
    FR9806130 1998-05-11

    Publications (2)

    Publication Number Publication Date
    EP0927826A1 EP0927826A1 (en) 1999-07-07
    EP0927826B1 true EP0927826B1 (en) 2005-03-30

    Family

    ID=26234050

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98460059A Expired - Lifetime EP0927826B1 (en) 1997-12-31 1998-12-18 Liquid pumping system

    Country Status (6)

    Country Link
    US (1) US6213348B1 (en)
    EP (1) EP0927826B1 (en)
    AT (1) ATE292245T1 (en)
    DE (1) DE69829546T2 (en)
    ES (1) ES2241109T3 (en)
    FR (1) FR2774729B1 (en)

    Families Citing this family (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US7194853B1 (en) 2001-06-12 2007-03-27 Knight Andrew F Pressurizer for a rocket engine
    US6499288B1 (en) 2001-06-12 2002-12-31 Andrew F. Knight Pressurizer for a rocket engine
    US7082750B2 (en) * 2002-08-09 2006-08-01 Knight Andrew F Pressurizer for a rocket engine
    US7007456B2 (en) * 2002-05-07 2006-03-07 Harrington Steven M Dual chamber pump and method
    US7611333B1 (en) * 2002-05-07 2009-11-03 Harrington Steven M Multiple chamber pump and method
    WO2008079202A1 (en) * 2006-12-19 2008-07-03 Lam Research Corporation Measuring fluid quantities, blending liquid constituents, and dispensing blends
    US20170016458A1 (en) * 2015-07-15 2017-01-19 Materials and Technologies, Corp. Simple Positive Displacement Pump Suitable for Pharmaceutical, Chemical, Biological, Viscous, Dense, Particulate Laden Fluids and Other Demanding Applications

    Family Cites Families (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    NL6615555A (en) * 1966-11-03 1968-05-06
    DE2910578A1 (en) * 1979-03-17 1980-09-25 Saarbergwerke Ag METHOD FOR CONVEYING SOLID-CONTAINING LIQUIDS AT INCREASED PRESSURE
    US4274552A (en) * 1979-03-26 1981-06-23 Coulter Electronics, Inc. Liquid dispenser
    DE3430934C2 (en) * 1984-08-22 1986-07-03 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Circuit arrangement for the controlled filling and refilling of containers with liquids
    FR2597850B1 (en) * 1986-04-28 1989-04-28 Tecalemit Equip LIQUID TRANSFER DEVICE
    GB9021094D0 (en) * 1990-09-27 1990-11-07 Oxford Glycosystems Ltd Liquid delivery systems
    US5480063A (en) * 1993-03-05 1996-01-02 Keyes; Denis E. Volumetric fluid dispensing apparatus
    US5680960A (en) * 1993-03-05 1997-10-28 Keyes; Denis E. Volumetric fluid dispensing apparatus
    AU1324195A (en) * 1994-01-06 1995-08-01 Ricom Engineering Limited Liquid recovery apparatus
    US5568882A (en) * 1995-02-03 1996-10-29 Abc Techcorp Precise volume fluid dispenser

    Also Published As

    Publication number Publication date
    ATE292245T1 (en) 2005-04-15
    ES2241109T3 (en) 2005-10-16
    EP0927826A1 (en) 1999-07-07
    FR2774729A1 (en) 1999-08-13
    DE69829546T2 (en) 2006-05-11
    US6213348B1 (en) 2001-04-10
    DE69829546D1 (en) 2005-05-04
    FR2774729B1 (en) 2000-03-17

    Similar Documents

    Publication Publication Date Title
    EP2542727B1 (en) Leak detection on flush valve
    EP0927826B1 (en) Liquid pumping system
    FR2719789A1 (en) Device for dispensing a product mixed with a fluid, dispensing assembly comprising such a device.
    EP0581947B1 (en) Fluid dispensing container
    FR2546634A1 (en) APPARATUS FOR PROJECTING LIQUID CAPS WITH PNEUMATIC OPERATION AND APPLICATION IN PARTICULAR TO SEISMIC SUBSEA PROSPECTION
    BE898425A (en) Vortex device for separating and eliminating a gas from a liquid, and installation comprising the application.
    FR2481382A1 (en) APPARATUS FOR PROJECTING LIQUID PLUGS
    FR2735004A1 (en) DEVICE FOR DELIVERING LIQUID SOAP TO A FOAM GENERATOR
    EP1899021A1 (en) Liquid mist fire extinguisher and use thereof
    EP1817243B1 (en) Non-vented pump for dispensing liquid product and associated dispenser
    EP2425714A2 (en) Device and method for distributing a liquid product to be sprayed onto a surface
    EP1914003A1 (en) Device for producing foam
    WO2004060790A1 (en) Method and installation used to regulate the filling of a container with a liquid
    WO2012168637A1 (en) System for refilling a reuseable container with a liquid contained in this container and which can be expelled by means of a propellant gas
    EP0058610B1 (en) Method and installation for producing a high vacuum using a single-stage liquid-ring pump
    EP0961894B1 (en) Monostable valve
    FR2604691A1 (en) APPARATUS FOR DISPENSING A PASTY PRODUCT
    EP1604166B1 (en) Discharge device for light materials, such as confetti or similar, and/or emulsions, such as foam, snow or similar
    FR2654817A1 (en) THERMAL TREATMENT DEVICE, PARTICULARLY FOR THE CHEMICAL AND FOOD INDUSTRIES.
    EP3511476B1 (en) Flushing valve for toilet bowls comprising a double actuation mechanism for releasing a large or a small volume of flushwater
    EP3378801B1 (en) Air gun system
    EP0648523B1 (en) Device and process for degasing a hydraulic circuit
    FR2646497A3 (en) Purge device for a gas supply line to a burner
    EP0255789A1 (en) Breathing apparatus for divers
    FR3078063A1 (en) DEGASSING DEVICE FOR A FUEL PUMP ASSEMBLY

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE DE ES GB IT NL SE

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    17P Request for examination filed

    Effective date: 19991116

    AKX Designation fees paid

    Free format text: AT BE DE ES GB IT NL SE

    17Q First examination report despatched

    Effective date: 20031015

    GRAP Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOSNIGR1

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): AT BE DE ES GB IT NL SE

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: NL

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050330

    Ref country code: AT

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050330

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    Free format text: NOT ENGLISH

    REF Corresponds to:

    Ref document number: 69829546

    Country of ref document: DE

    Date of ref document: 20050504

    Kind code of ref document: P

    GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

    Effective date: 20050725

    NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FG2A

    Ref document number: 2241109

    Country of ref document: ES

    Kind code of ref document: T3

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: BE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20051231

    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20060102

    BERE Be: lapsed

    Owner name: LE GROUYELLEC, ANDRE

    Effective date: 20051231

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20050630

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: ES

    Payment date: 20081217

    Year of fee payment: 11

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20081219

    Year of fee payment: 11

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20081216

    Year of fee payment: 11

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: IT

    Payment date: 20081227

    Year of fee payment: 11

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20091218

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20100701

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20091218

    REG Reference to a national code

    Ref country code: ES

    Ref legal event code: FD2A

    Effective date: 20110330

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20091218

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20110317

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: ES

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20091219