EP0465336A1 - Liquid products dosing device for agricultural vehicles - Google Patents

Liquid products dosing device for agricultural vehicles Download PDF

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Publication number
EP0465336A1
EP0465336A1 EP91401797A EP91401797A EP0465336A1 EP 0465336 A1 EP0465336 A1 EP 0465336A1 EP 91401797 A EP91401797 A EP 91401797A EP 91401797 A EP91401797 A EP 91401797A EP 0465336 A1 EP0465336 A1 EP 0465336A1
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EP
European Patent Office
Prior art keywords
treatment
flow control
product
control means
pressure
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Granted
Application number
EP91401797A
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German (de)
French (fr)
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EP0465336B1 (en
Inventor
Claude-Jean Desvigne
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/48—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids
    • B01F23/483—Mixing liquids with liquids; Emulsifying characterised by the nature of the liquids using water for diluting a liquid ingredient, obtaining a predetermined concentration or making an aqueous solution of a concentrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/49—Mixing systems, i.e. flow charts or diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71745—Feed mechanisms characterised by the means for feeding the components to the mixer using pneumatic pressure, overpressure, gas or air pressure in a closed receptacle or circuit system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/04—Mixing biocidal, pesticidal or herbicidal ingredients used in agriculture or horticulture, e.g. for spraying

Definitions

  • the present invention relates to a liquid product metering device, intended in particular for feeding agricultural spraying machines.
  • Vehicles are used, in particular in the agricultural field, for carrying out the treatment of crops, comprising spray bars which project onto the ground an appropriate treatment product, diluted with water in a predetermined proportion.
  • Some treatment machines thus include a tank filled with pure water, a container containing the product of treatment in concentrated form, and means for carrying out a controlled dilution of the treatment product in pure water.
  • These means generally consist of electric metering pumps by means of which a determined quantity of treatment product is withdrawn which is mixed with a given quantity of water, depending on the specific dilution of the product recommended by the manufacturer.
  • the type of pump that can be used for a given product depends on its chemical resistance to it, and the use of metering pumps capable of withstanding a very wide range of treatment products generally requires the use of highly technical materials. which increases the price of these pumps and the cost of treatment equipment.
  • the object of the present invention is to provide a simple metering device operating without metering pumps and which therefore is both very robust and of a particularly attractive cost price.
  • the present invention thus relates to a spraying apparatus comprising metering means of at least one concentrated liquid treatment product contained in at least one container, this product being intended to be diluted, in a predetermined proportion in a dilution liquid contained in a tank, characterized in that it comprises means for pressurizing the container so as to propel it through flow control means and to mix it with a determined quantity of said dilution liquid contained in the tank.
  • the pressurizing means consist of a pressure tank filled with a gas, which may possibly include a liquid phase, or which is optionally kept under pressure by a compressor, which ensures a regularity of the value of the pressure applied to the container containing the product to be dispensed and which therefore gives great regularity in the flow rate of the treatment product supplied.
  • the means making it possible to control the flow rate of the product to be dispensed, under the action of the pressure exerted on it by the pressure means consist of an orifice of calibrated section.
  • the container containing the treatment product to be dispensed as well as the flow control means form an interchangeable sub-assembly.
  • This arrangement makes it possible to switch particularly quickly from one treatment product to another without it being necessary to carry out any flow adjustment, since the flow control means are part of the sub-assembly interchangeable and are therefore adjusted once and for all all depending on the specific treatment product used. It is thus possible, on the same spraying vehicle, to have a series of sub-assemblies each containing a specific product to be distributed, which makes it easy to switch from one to the other.
  • Figure 1 shows, in schematic form, the distribution circuit of the metering device according to the invention.
  • FIG. 2 represents, in schematic form, a first variant of implementation of the metering device according to the invention.
  • FIG. 2a represents, in schematic form, an alternative embodiment of the embodiment of FIG. 2.
  • FIG. 3 represents, in diagrammatic form, a second alternative embodiment of the metering device according to the invention.
  • FIG. 4 represents, in diagrammatic form, a third alternative embodiment of the metering device according to the invention.
  • the metering device comprises a tank 1 containing a dilution liquid 2, constituted for example by pure water, and which is connected by a pipe 4, largely dimensioned in order to avoid pressure drops, to a suction pump 5 with interposition a non-return valve 7.
  • the upper part of the tank 6 is joined, by a pipe 12, to pressurizing means consisting for example of a tank 14 containing a gas under pressure.
  • a regulating valve 16 and pressure regulating valve is interposed between the container 6 and the pressure tank 14.
  • the pressure regulating valve 16 comprises, in known manner, regulating means, for example electronic, allowing to adjust, in particular by means of a potentiometer 18, the pressure at the outlet of the valve 16.
  • the bottom of the container 6 is pierced with an orifice connecting the treatment product 10 contained therein, to flow control means, constituted for example by an orifice of calibrated section, or nozzle, 22.
  • flow control means constituted for example by an orifice of calibrated section, or nozzle, 22.
  • the outlet of the nozzle 22 is connected to the pipe 4 by a pipe 20, with the interposition of a two-way "solenoid valve" 24.
  • This solenoid valve 24 functions as a product inlet valve in the circuit, and can be actuated by a control to distance, not shown in the drawing.
  • a regulating device 26, for example electronic, ensures the synchronization of operation of the pressure adjustment valve 16 and of the pump 5 by regulating on the one hand the pressure at the outlet of the valve 16 and on the other hand the flow rate of the pump 5 so as to adjust the quantity of treatment product 10 mixed with water, as a function of the speed of the machine, in order to keep a constant quantity of treatment product 10 distributed per hectare.
  • the regulation device 26 also makes it possible to stop a phase of treatment in progress, such as for example when it is necessary to carry out a directional maneuver at the end of a field, the device making it possible to delay the stopping of injection of the treatment product slightly before stopping the pump 5 which draws pure water from the tank 2, this time being such that the hydraulic circuit between the suction of the pump 5 and the nozzles of the treatment ramps will be automatically cleaned of the treatment liquid by a passage of pure water.
  • the user displays, by means of the adjustment potentiometer 18, the pressure recommended for the treatment product 10 contained in the container 6, and which depends on the conditions of use indicated by the manufacturer of the product, controls the pressurization of the pressure adjustment valve 16 and starts the pump 5.
  • the pressure adjustment valve 16 then puts the container 6 at the pressure set by the user and drives out the treatment product 10, through the calibrated orifice 22, towards the solenoid valve 24 which, if it was opened during startup, lets the treatment product 10 which thus mixes with the water sucked by the pump 5.
  • the treatment product 10 thus mixes, in a determined amount, with a corresponding quantity of the water sucked by the pump 5, and which is controlled by the regulating device 26, to constitute the treatment liquid distributed by the latter to the spray nozzles (not shown in the drawing).
  • means are provided for activating the pump 5 and the solenoid valve 24 only when the vehicle is in motion, which avoids spilling, for example at the start of treatment, the treatment liquid in quantity greater than that desired.
  • two treatment products 10, 10 ′ are used which are mixed simultaneously with the water 2 contained in the tank 1.
  • a second container 6 ′ is used. connected, like the previous one, to a pressure adjustment valve 16 ′ connected to the reservoir 14 and controlled by a potentiometer 18 ′.
  • This embodiment of the invention allows the simultaneous use of several products which mix with water at the last moment, in specific proportions, which may be different from each other.
  • This device therefore allows the use of two-component treatment products which are reacted with one another at the very last moment, which makes it possible to maintain the active character of the treatment products.
  • a series of modular elements 29a, 29b, 29c is constituted, each comprising a container 6a, 6b, 6c of treatment product 10a, 10b, 10c to which is associated a specific calibrated orifice 22a, 22b, 22c, the ends of the pipes ending in quick-fitting fittings 30.30 ′ coming to be fixed on complementary parts respectively 32.32 ′ of the circuit.
  • the user can thus have at his disposal, optionally at a fixed position on the processing machine, a series of different products 10a, 10b, 10c which he can in turn use without having to empty the tank 1, since it always contains the same dilution liquid 2.
  • the pump 5 is provided, on its outlet pipe, with flow control means, constituted by an orifice 39 of calibrated section, of section S2, in downstream of which is connected a pipe 40 connected to the flow control means 22 of the treatment product 10, which consist of an orifice of calibrated section 22 of section S1, with the interposition of a solenoid valve 24.
  • a module for adjusting and regulation pressure 44 connects the pressure adjustment valve 16 upstream of the calibrated section orifice 39.
  • An adjustment module 42 of the hydraulic or electronic type makes it possible to adjust the flow rate supplied to the injection nozzles as a function of the pressure P2 at the outlet.
  • the pressure P3 upstream of the orifice of calibrated section 22 has a value equal to the pressure P1 existing in upstream of the orifice of calibrated section 39
  • the dilution rate q / Q no longer depends only on the ratio of the sections of passage S1 and S2 of orifices of calibrated section 22 and 39.
  • the present device thus makes it possible to easily vary the quantity of the treatment product distributed per hectare by acting, for example, on the pressure P2 of the treatment liquid sent to the spray nozzles, while keeping the dilution rate q / constant.
  • Q which only depends on the calibrated section orifices, or nozzles, 22 and 39.
  • the distribution pressure P2 of the treatment liquid sent to the nozzles is kept constant, the dilution rate q / Q will be modified by varying, by means of module 44, the pressure ratio P3 / P1.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Accessories For Mixers (AREA)
  • Catching Or Destruction (AREA)

Abstract

Device for metering a liquid treatment product especially for agricultural spraying vehicles, comprising at least one concentrated liquid treatment product (10,10',10a-10c) contained in at least one receptacle (6,6',6a-6c), this product being intended to be diluted in a specified proportion in a diluent liquid (2) contained in a vessel (1). This device is characterised in that it comprises means for pressurising (14) the receptacle (6,6',6a-6b) so as to propel it through means for controlling flow rate (22) and to mix it with a specified quantity of the said diluent liquid (2) contained in the vessel (1).

Description

La présente invention concerne un appareil doseur de produits liquides, destiné notamment à l'alimentation d'engins agricoles de pulvérisation.The present invention relates to a liquid product metering device, intended in particular for feeding agricultural spraying machines.

On utilise, notamment dans le domaine agricole, pour réaliser le traitement des cultures, des véhicules comportant des rampes de pulvérisation qui projettent sur le sol un produit de traitement approprié, dilué à de l'eau dans une proportion déterminée.Vehicles are used, in particular in the agricultural field, for carrying out the treatment of crops, comprising spray bars which project onto the ground an appropriate treatment product, diluted with water in a predetermined proportion.

De façon habituelle le mélange des produits de traitement avec l'eau est réalisé dans une cuve, dont l'engin est pourvu, préalablement à l'opération de traitement. De ce fait il est quasiment impossible de prévoir la quantité exacte du mélange à préparer pour une opération de traitement déterminée et, par mesure de sécurité, c'est-à-dire afin d'éviter de manquer de produit au cours de ladite opération, les utilisateurs ont pour habitude de préparer une quantité de produit supérieure à leurs besoins réels. En conséquence, il reste donc dans la cuve, après l'opération de traitement, une certaine quantité de produit dont les utilisateurs se débarrassent par une vidange, soit sur place soit au cours du trajet de retour de l'engin. Ces opérations de vidange, concernant des produits, la plupart du temps, de toxicité élevée, constituent un facteur de pollution de l'environnement.Usually mixing the treatment products with water is carried out in a tank, with which the machine is provided, prior to the treatment operation. As a result, it is almost impossible to predict the exact quantity of the mixture to be prepared for a given treatment operation and, for safety reasons, that is to say in order to avoid running out of product during said operation, users are in the habit of preparing a quantity of product greater than their real needs. Consequently, there remains in the tank, after the treatment operation, a certain quantity of product which the users get rid of by emptying, either on site or during the return journey of the machine. These emptying operations, concerning products, most of the time, of high toxicity, constitute a factor of pollution of the environment.

Afin d'éviter cette pollution on a proposé de mélanger le produit de traitement à l'eau de dilution, sur le lieu même du traitement et au fur et à mesure des besoins, ce qui évite tout excès de produit en fin de traitement. Certains engins de traitement comportent ainsi une cuve remplie d'eau pure, un récipient contenant le produit de traitement sous forme concentrée, et des moyens permettant de réaliser une dilution contrôlée du produit de traitement dans l'eau pure. Ces moyens sont généralement constitués de pompes électriques doseuses au moyen desquelles on prélève une quantité déterminée de produit de traitement que l'on mélange à une quantité d'eau donnée, fonction de la dilution spécifique du produit préconisé par le fabriquant.In order to avoid this pollution, it has been proposed to mix the treatment product with the dilution water, at the site of the treatment and as and when required, which avoids any excess of product at the end of the treatment. Some treatment machines thus include a tank filled with pure water, a container containing the product of treatment in concentrated form, and means for carrying out a controlled dilution of the treatment product in pure water. These means generally consist of electric metering pumps by means of which a determined quantity of treatment product is withdrawn which is mixed with a given quantity of water, depending on the specific dilution of the product recommended by the manufacturer.

Le type de pompe utilisable pour un produit donné dépend de sa résistance chimique à celui-ci, et la mise en oeuvre de pompes doseuses susceptibles de résister à une gamme très étendue de produits de traitement impose généralement de faire appel à des matériels de haute technicité ce qui augmente le prix de ces pompes et le prix de revient du matériel de traitement.The type of pump that can be used for a given product depends on its chemical resistance to it, and the use of metering pumps capable of withstanding a very wide range of treatment products generally requires the use of highly technical materials. which increases the price of these pumps and the cost of treatment equipment.

De plus, le débit de produit fourni par ces pompes est fonction de leur tension électrique d'alimentation, et il est ainsi nécessaire, pour maitriser leur débit, de les alimenter par des tensions parfaitement régulées et contrôlables. Ces moyens d'alimentation électriques compliquent ainsi l'installation et, de ce fait, augmentent également le prix de revient.In addition, the product flow supplied by these pumps is a function of their electrical supply voltage, and it is thus necessary, to control their flow, to supply them with perfectly regulated and controllable voltages. These electrical supply means thus complicate the installation and, as a result, also increase the cost price.

La présente invention a pour but un dispositif doseur simple fonctionnant sans pompes doseuses et qui de ce fait soit à la fois d'une grande robustesse et d'un prix de revient particulièrement intéressant.The object of the present invention is to provide a simple metering device operating without metering pumps and which therefore is both very robust and of a particularly attractive cost price.

La présente invention a ainsi pour objet un appareil de pulvérisation comprenant des moyens doseurs d'au moins un produit de traitement liquide concentré contenu dans au moins un récipient, ce produit étant destiné à être dilué, en une proportion déterminée dans un liquide de dilution contenu dans une cuve, caractérisé en ce qu'il comporte des moyens de mise sous pression du récipient de façon à le propulser au travers de moyens de contrôle de débit et à le mélanger à une quantité déterminée dudit liquide de dilution contenu dans la cuve.The present invention thus relates to a spraying apparatus comprising metering means of at least one concentrated liquid treatment product contained in at least one container, this product being intended to be diluted, in a predetermined proportion in a dilution liquid contained in a tank, characterized in that it comprises means for pressurizing the container so as to propel it through flow control means and to mix it with a determined quantity of said dilution liquid contained in the tank.

Dans une variante de l'invention, les moyens de mise sous pression sont constitués d'un réservoir sous pression rempli d'un gaz, pouvant éventuellement comporter une phase liquide, ou qui est éventuellement maintenu sous pression par un compresseur, ce qui assure une régularité de la valeur de la pression appliquée au récipient contenant le produit à distribuer et qui confère donc une grande régularité du débit du produit de traitement fourni.In a variant of the invention, the pressurizing means consist of a pressure tank filled with a gas, which may possibly include a liquid phase, or which is optionally kept under pressure by a compressor, which ensures a regularity of the value of the pressure applied to the container containing the product to be dispensed and which therefore gives great regularity in the flow rate of the treatment product supplied.

Dans une variante de l'invention les moyens permettant d'assurer le contrôle du débit du produit à distribuer, sous l'action de la pression exercée sur celui-ci par les moyens de pression, sont constitués d'un orifice de section calibrée.In a variant of the invention, the means making it possible to control the flow rate of the product to be dispensed, under the action of the pressure exerted on it by the pressure means, consist of an orifice of calibrated section.

Dans une autre variante particulièrement intéressante de l'invention, le récipient contenant le produit de traitement à distribuer ainsi que les moyens de contrôle du débit forment un sous-ensemble interchangeable. Celui-ci comporte avantageusement des moyens de connexion amont et aval, de type à mise en place rapide, permettant de le relier aux autres éléments correspondants du dispositif. Cette disposition permet de passer de façon particulièrement rapide d'un produit de traitement à un autre sans qu'il soit nécessaire d'effectuer un réglage de débit quel qu'il soit, puisque les moyens de contrôle de débit font partie du sous-ensemble interchangeable et sont donc réglés une fois pour toutes en fonction du produit de traitement spécifique utilisé. On peut ainsi, sur un même véhicule de pulvérisation disposer d'une série de sous-ensembles contenant chacun un produit spécifique à distribuer, ce qui permet aisément de passer de l'un à l'autre.In another particularly advantageous variant of the invention, the container containing the treatment product to be dispensed as well as the flow control means form an interchangeable sub-assembly. This advantageously includes upstream and downstream connection means, of the quick-setting type, making it possible to connect it to the other corresponding elements of the device. This arrangement makes it possible to switch particularly quickly from one treatment product to another without it being necessary to carry out any flow adjustment, since the flow control means are part of the sub-assembly interchangeable and are therefore adjusted once and for all all depending on the specific treatment product used. It is thus possible, on the same spraying vehicle, to have a series of sub-assemblies each containing a specific product to be distributed, which makes it easy to switch from one to the other.

On peut également mettre en oeuvre, simultanément, le mélange de plusieurs produits de traitement déterminés avec une quantité d'eau donnée. Il est ainsi possible d'utiliser des produits de traitement composés de plusieurs éléments qui, une fois mélangés, ont une période d'activité de durée réduite.It is also possible to use, simultaneously, the mixture of several determined treatment products with a given quantity of water. It is thus possible to use treatment products composed of several elements which, once mixed, have an activity period of reduced duration.

On décrira ci-après, à titre d'exemple non limitatif, plusieurs formes d'exécution de la présente invention, en référence au dessin annexé sur lequel :Several embodiments of the present invention will be described below, by way of non-limiting example, with reference to the appended drawing in which:

La figure 1 représente, sous forme schématique, le circuit de distribution de l'appareil doseur suivant l'invention.Figure 1 shows, in schematic form, the distribution circuit of the metering device according to the invention.

La figure 2 représente, sous forme schématique, une première variante de mise en oeuvre de l'appareil doseur suivant l'invention.FIG. 2 represents, in schematic form, a first variant of implementation of the metering device according to the invention.

La figure 2a représente, sous forme schématique, une variante de mise en oeuvre du mode de réalisation de la figure 2.FIG. 2a represents, in schematic form, an alternative embodiment of the embodiment of FIG. 2.

La figure 3 représente, sous forme schématique, une seconde variante de mise en oeuvre de l'appareil doseur suivant l'invention.FIG. 3 represents, in diagrammatic form, a second alternative embodiment of the metering device according to the invention.

La figure 4 représente, sous forme schématique, une troisième variante de mise en oeuvre de l'appareil doseur suivant l'invention.FIG. 4 represents, in diagrammatic form, a third alternative embodiment of the metering device according to the invention.

Sur la Figure 1 l'appareil doseur suivant l'invention comprend une cuve 1 contenant un liquide de dilution 2, constitué par exemple par de l'eau pure, et qui est reliée par une canalisation 4, largement dimensionnée afin d'éviter les pertes de charge, à une pompe d'aspiration 5 avec interposition d'un clapet anti-retour 7.In Figure 1 the metering device according to the invention comprises a tank 1 containing a dilution liquid 2, constituted for example by pure water, and which is connected by a pipe 4, largely dimensioned in order to avoid pressure drops, to a suction pump 5 with interposition a non-return valve 7.

Un réservoir 6 fermé par des moyens 8, permettant de le rendre étanche à l'atmosphère, contient un produit de traitement 10 à l'état concentré qui, mélangé au liquide de dilution 2 en des proportions déterminées constituera le liquide de traitement. La partie supérieure du réservoir 6 est réunie, par une canalisation 12, à des moyens de mise en pression constitués par exemple d'un réservoir 14 contenant un gaz sous pression. Sur la canalisation 12 une valve de réglage 16 et de régulation de pression est interposée entre le récipient 6 et le réservoir de pression 14. La valve de réglage de pression 16 comporte, de façon connue, des moyens de réglage, par exemple électroniques, permettant de régler, notamment au moyen d'un potentiomètre 18, la pression en sortie de la valve 16.A tank 6 closed by means 8, making it airtight, contains a treatment product 10 in the concentrated state which, mixed with the dilution liquid 2 in predetermined proportions will constitute the treatment liquid. The upper part of the tank 6 is joined, by a pipe 12, to pressurizing means consisting for example of a tank 14 containing a gas under pressure. On the line 12 a regulating valve 16 and pressure regulating valve is interposed between the container 6 and the pressure tank 14. The pressure regulating valve 16 comprises, in known manner, regulating means, for example electronic, allowing to adjust, in particular by means of a potentiometer 18, the pressure at the outlet of the valve 16.

Le fond du récipient 6 est percé d'un orifice reliant le produit de traitement 10 contenu dans celui-ci, à des moyens de contrôle du débit, constitués par exemple par un orifice de section calibrée, ou gicleur, 22. La sortie du gicleur 22 est réunie à la canalisation 4 par une canalisation 20, avec interposition d'un "électrodistributeur" à deux voies 24. Cet électrodistributeur 24, fonctionne comme un robinet d'admission de produit dans le circuit, et peut être actionné par une commande à distance, non représentée sur le dessin.The bottom of the container 6 is pierced with an orifice connecting the treatment product 10 contained therein, to flow control means, constituted for example by an orifice of calibrated section, or nozzle, 22. The outlet of the nozzle 22 is connected to the pipe 4 by a pipe 20, with the interposition of a two-way "solenoid valve" 24. This solenoid valve 24, functions as a product inlet valve in the circuit, and can be actuated by a control to distance, not shown in the drawing.

Un dispositif de régulation 26, par exemple électronique, assure la synchronisation de fonctionnement de la valve de réglage de pression 16 et de la pompe 5 en régulant d'une part la pression en sortie de la valve 16 et d'autre part le débit de la pompe 5 de façon à ajuster la quantité de produit de traitement 10 mélangée à l'eau, en fonction de la vitesse de l'engin, pour conserver constante une quantité de produit de traitement 10 distribué à l'hectare. Le dispositif de régulation 26 permet en outre de stopper une phase de traitement en cours, comme par exemple lorsqu'il est nécessaire d'effectuer une manoeuvre directionnelle en extrémité d'un champ, le dispositif permettant de temporiser l'arrêt d'injection du produit de traitement légèrement avant l'arrêt de la pompe 5 qui puise de l'eau pure dans le réservoir 2, ce temps étant tel que le circuit hydraulique entre l'aspiration de la pompe 5 et les buses des rampes de traitement se trouveront automatiquement nettoyés du liquide de traitement par un passage d'eau pure.A regulating device 26, for example electronic, ensures the synchronization of operation of the pressure adjustment valve 16 and of the pump 5 by regulating on the one hand the pressure at the outlet of the valve 16 and on the other hand the flow rate of the pump 5 so as to adjust the quantity of treatment product 10 mixed with water, as a function of the speed of the machine, in order to keep a constant quantity of treatment product 10 distributed per hectare. The regulation device 26 also makes it possible to stop a phase of treatment in progress, such as for example when it is necessary to carry out a directional maneuver at the end of a field, the device making it possible to delay the stopping of injection of the treatment product slightly before stopping the pump 5 which draws pure water from the tank 2, this time being such that the hydraulic circuit between the suction of the pump 5 and the nozzles of the treatment ramps will be automatically cleaned of the treatment liquid by a passage of pure water.

Dans ces conditions le fonctionnement du dispositif doseur suivant l'invention s'établit comme suit :Under these conditions, the operation of the metering device according to the invention is established as follows:

Avant une phase de traitement l'utilisateur affiche, au moyen du potentiomètre de réglage 18, la pression préconisée pour le produit de traitement 10 contenu dans le récipient 6, et qui dépend des conditions d'utilisation indiquées par le fabriquant du produit, commande la mise en pression de la valve de réglage de pression 16 et met en route la pompe 5. La valve de réglage de pression 16 met alors le récipient 6 à la pression réglée par l'utilisateur et chasse le produit de traitement 10, au travers de l'orifice calibré 22, vers l'électrodistributeur 24 qui, s'il a été ouvert au cours de la mise en route, laisse passer le produit de traitement 10 qui se mélange ainsi avec l'eau aspirée par la pompe 5. Le produit de traitement 10 se mélange ainsi, en quantité déterminée, avec une quantité correspondante de l'eau aspirée par la pompe 5, et qui est contrôlée par le dispositif de régulation 26, pour constituer le liquide de traitement distribué par celle-ci aux buses de pulvérisation (non représentées sur le dessin).Before a treatment phase, the user displays, by means of the adjustment potentiometer 18, the pressure recommended for the treatment product 10 contained in the container 6, and which depends on the conditions of use indicated by the manufacturer of the product, controls the pressurization of the pressure adjustment valve 16 and starts the pump 5. The pressure adjustment valve 16 then puts the container 6 at the pressure set by the user and drives out the treatment product 10, through the calibrated orifice 22, towards the solenoid valve 24 which, if it was opened during startup, lets the treatment product 10 which thus mixes with the water sucked by the pump 5. The treatment product 10 thus mixes, in a determined amount, with a corresponding quantity of the water sucked by the pump 5, and which is controlled by the regulating device 26, to constitute the treatment liquid distributed by the latter to the spray nozzles (not shown in the drawing).

Dans une variante intéressante de l'invention des moyens sont prévus pour n'activer la pompe 5 et l'électrodistributeur 24 que lorsque le véhicule se trouve en déplacement, ce qui évite de répandre, par exemple en début de traitement, le liquide de traitement en quantité supérieure à celle souhaitée.In an advantageous variant of the invention, means are provided for activating the pump 5 and the solenoid valve 24 only when the vehicle is in motion, which avoids spilling, for example at the start of treatment, the treatment liquid in quantity greater than that desired.

Dans une variante de l'invention, représentée sur la figure 2 on utilise deux produits de traitement 10,10′ qui se mélangent simultanément avec l'eau 2 contenue dans la cuve 1. Pour ce faire on met en oeuvre un second récipient 6′ relié, comme le précédent, à une valve de réglage de pression 16′ connectée au réservoir 14 et commandée par un potentiomètre 18′. Les liquides 10 et 10′, en sortie des réservoirs 6 et 6′, traversent des orifices calibrés respectivement 22 et 22′ pour parvenir, par des canalisations 20 et 20′, à des électrodistributeurs 24 et 24′. Ce mode de mise en oeuvre de l'invention permet d'utiliser simultanément plusieurs produits qui se mélangent avec l'eau au dernier moment, en des proportions spécifiques, pouvant être différentes les unes des autres. Ce dispositif permet en conséquence d'utiliser des produits de traitement à deux composants que l'on fait réagir l'un sur l'autre, au tout dernier moment, ce qui permet de maintenir au maximum le caractère actif des produits de traitement.In a variant of the invention, shown in FIG. 2, two treatment products 10, 10 ′ are used which are mixed simultaneously with the water 2 contained in the tank 1. To do this, a second container 6 ′ is used. connected, like the previous one, to a pressure adjustment valve 16 ′ connected to the reservoir 14 and controlled by a potentiometer 18 ′. The liquids 10 and 10 ′, at the outlet from the tanks 6 and 6 ′, pass through calibrated orifices 22 and 22 ′ respectively to reach, by pipes 20 and 20 ′, solenoid valves 24 and 24 ′. This embodiment of the invention allows the simultaneous use of several products which mix with water at the last moment, in specific proportions, which may be different from each other. This device therefore allows the use of two-component treatment products which are reacted with one another at the very last moment, which makes it possible to maintain the active character of the treatment products.

On peut bien entendu, comme montré sur la figure 2a, alimenter les deux récipients 6,6′ contenant les produits de traitements 10,10′ avec une seule valve de réglage de pression 16. Dans ce cas les rapports de dilution relatifs des différents produits seront alors ajustés par les seuls valeurs des sections des orifices de section calibrée 22,22′.It is obviously possible, as shown in FIG. 2a, to supply the two containers 6,6 ′ containing the treatment products 10,10 ′ with a single pressure adjustment valve 16. In this case the relative dilution ratios of the different products will then be adjusted by the only values of the sections of the orifices of calibrated section 22,22 ′.

Dans une autre variante de mise en oeuvre intéressante de l'invention, représentée sur la figure 3, on constitue une série d'éléments modulaires 29a,29b,29c comprenant, chacun, un récipient 6a,6b,6c de produit de traitement 10a,10b,10c auquel est associé un orifice calibré spécifique 22a,22b,22c, les extrémités des canalisations se terminant par des raccords à emmanchement rapide 30,30′ venant se fixer sur des parties complémentaires respectivement 32,32′ du circuit. L'utilisateur peut ainsi avoir à sa disposition, éventuellement à poste fixe sur l'engin de traitement, une série de produits différents 10a,10b,10c qu'il pourra tour à tour utiliser sans avoir à réaliser une vidange de la cuve 1, puisque celle-ci contient dans tous les cas le même liquide de dilution 2.In another interesting implementation variant of the invention, represented in FIG. 3, a series of modular elements 29a, 29b, 29c is constituted, each comprising a container 6a, 6b, 6c of treatment product 10a, 10b, 10c to which is associated a specific calibrated orifice 22a, 22b, 22c, the ends of the pipes ending in quick-fitting fittings 30.30 ′ coming to be fixed on complementary parts respectively 32.32 ′ of the circuit. The user can thus have at his disposal, optionally at a fixed position on the processing machine, a series of different products 10a, 10b, 10c which he can in turn use without having to empty the tank 1, since it always contains the same dilution liquid 2.

Dans une variante particulièrement intéressante de l'invention, représentée sur la figure 4, la pompe 5 est pourvue, sur sa canalisation de sortie, de moyens de contrôle de débit, constitués d'un orifice 39 de section calibrée, de section S2, en aval duquel est connectée une canalisation 40 reliée aux moyens de contrôle de débit 22 du produit de traitement 10, qui sont constitués d'un orifice de section calibrée 22 de section S1, avec interposition d'un électrodistributeur 24. Un module de réglage et de régulation de pression 44 relie la valve de réglage de pression 16 à l'amont de l'orifice de section calibrée 39.In a particularly advantageous variant of the invention, shown in FIG. 4, the pump 5 is provided, on its outlet pipe, with flow control means, constituted by an orifice 39 of calibrated section, of section S2, in downstream of which is connected a pipe 40 connected to the flow control means 22 of the treatment product 10, which consist of an orifice of calibrated section 22 of section S1, with the interposition of a solenoid valve 24. A module for adjusting and regulation pressure 44 connects the pressure adjustment valve 16 upstream of the calibrated section orifice 39.

Un module de réglage 42 de type par exemple hydraulique ou électronique permet d'ajuster le débit fourni aux buses d'injection en fonction de la pression P2 en sortie.An adjustment module 42 of the hydraulic or electronic type, for example, makes it possible to adjust the flow rate supplied to the injection nozzles as a function of the pressure P2 at the outlet.

Si l'on considère que dans un tel dispositif les pressions en amont et en aval des orifices de section calibrée 22 et 39 sont respectivement P₃ et P₂ d'une part, et P₁ et P₂ d'autre part, les débits fournis respectivement par les orifices de section calibrée 22 et 39 sont ainsi, de façon connue :

Figure imgb0001
If we consider that in such a device the pressures upstream and downstream of the orifices of calibrated section 22 and 39 are respectively P₃ and P₂ on the one hand, and P₁ and P₂ on the other hand, the flow rates supplied respectively by the orifices of calibrated section 22 and 39 are thus, in known manner:
Figure imgb0001

Dans le cas particulier où l'on règle et où l'on maintient, au moyen du module de réglage et de régulation 44, la pression P3 en amont de l'orifice de section calibrée 22 a une valeur égale à la pression P₁ existant en amont de l'orifice de section calibrée 39, le rapport de dilution, c'est-à-dire le rapport q/Q du débit q du produit de traitement 10 sur le débit Q de l'eau de dilution 2 est égal à : q/Q = k˝.S₁/S₂

Figure imgb0002
In the particular case where one adjusts and where one maintains, by means of the adjustment and regulation module 44, the pressure P3 upstream of the orifice of calibrated section 22 has a value equal to the pressure P₁ existing in upstream of the orifice of calibrated section 39, the dilution ratio, that is to say the ratio q / Q of the flow q of the treatment product 10 over the flow Q of the dilution water 2 is equal to: q / Q = k˝.S₁ / S₂
Figure imgb0002

Dans ces conditions on constate que le taux de dilution q/Q ne dépend plus que du rapport des sections de passage S₁ et S₂ des orifices de section calibrée 22 et 39.Under these conditions, it can be seen that the dilution rate q / Q no longer depends only on the ratio of the sections of passage S₁ and S₂ of orifices of calibrated section 22 and 39.

Le présent dispositif permet ainsi de faire varier facilement la quantité du produit de traitement distribuée à l'hectare en jouant, par exemple, sur la pression P2 du liquide de traitement envoyé aux buses de pulvérisation, tout en maintenant constant le taux de dilution q/Q qui ne dépend que des orifices de section calibrée, ou gicleurs, 22 et 39.The present device thus makes it possible to easily vary the quantity of the treatment product distributed per hectare by acting, for example, on the pressure P2 of the treatment liquid sent to the spray nozzles, while keeping the dilution rate q / constant. Q which only depends on the calibrated section orifices, or nozzles, 22 and 39.

A l'inverse, si l'on maintient constante la pression de distribution P₂ du liquide de traitement envoyé aux buses, on modifiera le taux de dilution q/Q en faisant varier, au moyen du module 44 le rapport des pressions P3/P1.Conversely, if the distribution pressure P₂ of the treatment liquid sent to the nozzles is kept constant, the dilution rate q / Q will be modified by varying, by means of module 44, the pressure ratio P3 / P1.

Claims (13)

1.- Appareil doseur de produit de traitement liquide notamment pour engins agricoles de pulvérisation, comprenant au moins un produit (10,10′,10a-10c) de traitement liquide concentré contenu dans au moins un récipient (6,6′,6a-6c), ce produit étant destiné à être dilué, en une proportion déterminée, dans un liquide de dilution (2) contenu dans une cuve (1), caractérisé en ce qu'il comporte des moyens de mise sous pression (14) du produit de traitement (10,10′,10a-10c) contenu dans le récipient (6,6′,6a-6b) de façon à le propulser au travers de moyens de contrôle de débit (22) et à le mélanger à une quantité déterminée du liquide de dilution (2) contenu dans la cuve (1). 1.- Metering device for liquid treatment product, in particular for agricultural spraying machines, comprising at least one product (10,10 ′, 10a-10c) for concentrated liquid treatment contained in at least one container (6,6 ′, 6a- 6c), this product being intended to be diluted, in a determined proportion, in a dilution liquid (2) contained in a tank (1), characterized in that it comprises means for pressurizing (14) the product treatment (10,10 ′, 10a-10c) contained in the container (6,6 ′, 6a-6b) so as to propel it through flow control means (22) and to mix it with a determined quantity dilution liquid (2) contained in the tank (1). 2.- Appareil suivant la revendication 1 caractérisé en ce que les moyens de contrôle de débit sont constitués d'un orifice de section calibrée ( 22 ). 2.- Apparatus according to claim 1 characterized in that the flow control means consist of an orifice of calibrated section (22). 3.- Appareil suivant l'une des revendications précédentes caractérisé en ce que le récipient (6,6′,6a-6c) contenant le produit de traitement (10,10′,10a-10c) est relié à un réservoir (14) de gaz sous pression. 3.- Apparatus according to one of the preceding claims characterized in that the container (6,6 ′, 6a-6c) containing the treatment product (10,10 ′, 10a-10c) is connected to a reservoir (14) gas under pressure. 4.- Appareil suivant la revendication 3 caractérisé en ce qu'un dispositif de réglage et de régulation de pression (16,16′) est interposé entre le récipient (6,6′,6a-6c) et le réservoir de gaz sous pression (14). 4.- Apparatus according to claim 3 characterized in that a pressure adjustment and regulation device (16,16 ′) is interposed between the container (6,6 ′, 6a-6c) and the pressurized gas tank (14). 5.- Appareil suivant l'une quelconque des revendications précédentes caractérisé en ce que le récipient (6,6′,6a-6c) contenant le produit de traitement (10,10′,10a-10c) et les moyens de contrôle de débit (22) qui lui sont respectivement associés, forment un sous-ensemble comportant des moyens de connexion amont (30′) et aval (30) destinés à coopérer avec des moyens de connexion complémentaires de l'appareil. 5.- Apparatus according to any one of the preceding claims characterized in that the container (6,6 ′, 6a-6c) containing the treatment product (10,10 ′, 10a-10c) and the flow control means (22) which are respectively associated with it, form a sub-assembly comprising upstream (30 ′) and downstream (30) connection means intended for cooperate with complementary connection means of the device. 6.- Appareil suivant l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte des moyens d'aspiration (5) du liquide produit de dilution (2) reliés à la cuve (1), et des moyens de propulsion (5) assurant le mélange du liquide de dilution avec le produit de traitement en sortie des moyens de contrôle de débit (22). 6.- Apparatus according to any one of the preceding claims characterized in that it comprises suction means (5) of the dilution liquid (2) connected to the tank (1), and propulsion means (5 ) ensuring the mixing of the dilution liquid with the treatment product at the outlet of the flow control means (22). 7.- Appareil suivant la revendication 6 caractérisé en ce que les moyens d'aspiration et de propulsion sont constitués d'une pompe (5). 7.- Apparatus according to claim 6 characterized in that the suction and propulsion means consist of a pump (5). 8.- Appareil suivant la revendication 6 caractérisé en ce que le produit de traitement (10,10′,10a-10c), en sortie des moyens de contrôle de débit (22), est délivré en amont des moyens d'aspiration (5). 8.- Apparatus according to claim 6 characterized in that the treatment product (10,10 ′, 10a-10c), at the outlet of the flow control means (22), is delivered upstream of the suction means (5 ). 9.- Appareil suivant la revendication 6 caractérisé en ce que le produit de traitement (10,10′,10a-10c) en sortie des moyens de contrôle de débit (22) est délivré en aval des moyens de propulsion (5). 9.- Apparatus according to claim 6 characterized in that the treatment product (10,10 ′, 10a-10c) at the outlet of the flow control means (22) is delivered downstream of the propulsion means (5). 10.- Appareil suivant la revendication 9 caractérisé en ce qu'il comporte des moyens de réglage et de régulation pour régler la pression (P3), en amont des moyens de contrôle de débit (22) du produit de traitement (10,10′,10a-10c), dans un rapport donné de la pression (P1) existant en amont des moyens de contrôle du débit (39) du liquide de dilution (2). 10.- Apparatus according to claim 9 characterized in that it comprises adjustment and regulation means for adjusting the pressure (P3), upstream of the flow control means (22) of the treatment product (10,10 ′ , 10a-10c), in a given pressure ratio (P1) existing upstream of the flow control means (39) of the dilution liquid (2). 11.- Appareil suivant la revendication 10 caractérisé en ce que le rapport (P₃/P₁) de la pression (P3) existant en amont des moyens de contrôle de débit (22) du produit de traitement sur la pression (P1) existant en amont des moyens de contrôle de débit (39) du liquide de dilution (2) est égal à un. 11.- Apparatus according to claim 10 characterized in that the ratio (P₃ / P₁) of the pressure (P3) existing upstream of the flow control means (22) of the treatment product on the pressure (P1) existing upstream flow control means (39) of the dilution liquid (2) is equal has a. 12.- Appareil suivant la revendication 10 caractérisé en ce que des moyens de réglage et de régulation (42) sont prévus pour régler la pression (P₂) du liquide de traitement en sortie de l'appareil. 12.- Apparatus according to claim 10 characterized in that adjusting and regulating means (42) are provided for adjusting the pressure (P₂) of the treatment liquid leaving the apparatus. 13.- Appareil suivant la revendication 6 caractérisé en ce que des moyens de temporisation coupent l'arrivée du produit de traitement (10,10′,10a-10c) avant l'arrêt des moyens d'aspiration et de propulsion (5). 13.- Apparatus according to claim 6 characterized in that timing means cut off the arrival of the treatment product (10,10 ′, 10a-10c) before stopping the suction and propulsion means (5).
EP91401797A 1990-07-03 1991-07-01 Liquid products dosing device for agricultural vehicles Expired - Lifetime EP0465336B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9008411 1990-07-03
FR9008411A FR2664179B1 (en) 1990-07-03 1990-07-03 APPARATUS FOR METERING LIQUID PRODUCTS FOR AGRICULTURAL MACHINERY.

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EP0465336A1 true EP0465336A1 (en) 1992-01-08
EP0465336B1 EP0465336B1 (en) 1995-09-20

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WO2001096005A1 (en) * 2000-06-12 2001-12-20 Supaturf Products Limited Mixing liquids under pressure

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DE19909145B4 (en) * 1999-03-03 2009-08-20 Daimler Ag Process for pressurizing a reactant of a gas generating system
DE102008010801B4 (en) * 2008-02-23 2011-03-03 Pierburg Gmbh Dosing device for solid pellets of an ammonia-releasing substance
DE102008053411A1 (en) * 2008-10-27 2010-05-06 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Dosing device for dosing a medium comprises a media container with an outlet for a medium being metered and a gas inlet, a pressure source for applying a gas pressure to the gas inlet, a flow sensor and an evaluation unit

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EP0143294A2 (en) * 1983-10-29 1985-06-05 Weber Apparatebau GmbH Apparatus for dosing a component to a solvent or diluent
GB2152394A (en) * 1984-01-14 1985-08-07 Robert Alec Lewis Balanced-pressure liquid additive induction system
EP0219800A2 (en) * 1985-10-17 1987-04-29 Klaus Weber Mixing device for liquids

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US4391390A (en) * 1981-01-21 1983-07-05 Howard Arthur G Chemical-mixing and dispensing apparatus
EP0143294A2 (en) * 1983-10-29 1985-06-05 Weber Apparatebau GmbH Apparatus for dosing a component to a solvent or diluent
GB2152394A (en) * 1984-01-14 1985-08-07 Robert Alec Lewis Balanced-pressure liquid additive induction system
EP0219800A2 (en) * 1985-10-17 1987-04-29 Klaus Weber Mixing device for liquids

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001096005A1 (en) * 2000-06-12 2001-12-20 Supaturf Products Limited Mixing liquids under pressure
GB2379174A (en) * 2000-06-12 2003-03-05 Supaturf Products Ltd Mixing liquids under pressure

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DE69113142T2 (en) 1996-05-30
DE69113142D1 (en) 1995-10-26
FR2664179B1 (en) 1994-01-28
EP0465336B1 (en) 1995-09-20
FR2664179A1 (en) 1992-01-10

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