EP0761534B1 - Device for filling a reservoir of a device for pulverising phytosanitary products - Google Patents

Device for filling a reservoir of a device for pulverising phytosanitary products Download PDF

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Publication number
EP0761534B1
EP0761534B1 EP96401855A EP96401855A EP0761534B1 EP 0761534 B1 EP0761534 B1 EP 0761534B1 EP 96401855 A EP96401855 A EP 96401855A EP 96401855 A EP96401855 A EP 96401855A EP 0761534 B1 EP0761534 B1 EP 0761534B1
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EP
European Patent Office
Prior art keywords
reservoir
valve
pressure
piston
tank
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
EP96401855A
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German (de)
French (fr)
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EP0761534A1 (en
Inventor
Patrick Ballu
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.)
Exel Industries SA
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Exel Industries SA
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Publication date
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Publication of EP0761534A1 publication Critical patent/EP0761534A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
    • B05B7/1436—Arrangements for supplying particulate material comprising means for supplying an additional liquid to a container where the particulate material and the additional liquid are brought together
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/04—Methods of, or means for, filling the material into the containers or receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • B65B3/34—Methods or devices for controlling the quantity of the material fed or filled by timing of filling operations
    • B65B3/36—Methods or devices for controlling the quantity of the material fed or filled by timing of filling operations and arresting flow by cut-off means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/88054—Direct response normally closed valve limits direction of flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87917—Flow path with serial valves and/or closures
    • Y10T137/88062—Coaxial oppositely directed seats

Definitions

  • the present invention relates to a device for filling a product sprayer tank phytosanitary in aqueous solution, and, more particularly, to such a device comprising means connection to a pressurized water source and a non-return valve placed in these connection means and mounted passing from the source to the tank.
  • This sprayer conventionally comprises a lance of spray powered by a pressure tank containing an aqueous solution of a phytosanitary product. A dose of this product being introduced into the tank, it is closed and connected to the distribution network of water, for example by means of a "quick" connection. Under the mains water pressure, the non-return valve opens and the tank fills until the air initially contained in the tank is compressed to the pressure which balances that of mains water.
  • This device thus allows convenient filling of the tank while compressing the air trapped there.
  • the water pressure of the distribution varies widely, commonly from 2 to 10 bars.
  • the volume of the compressed air in the tank will then be a function of network water pressure.
  • the volume of water in the tank varies with this pressure. This variation then disrupts the dosage of the product. phytosanitary initially introduced, which can be very harmful with regard to the effectiveness of the treatment of the plants concerned.
  • the network water pressure is very higher than the set pressure for the tank, there is a risk of bringing it to pressure excessive, which can be dangerous.
  • the pressure in the tank can fall back too low and the user must then operate a manual pump conventionally integrated into the sprayer to build up pressure in the tank.
  • the sprayer of the type described above excluding the presence of a safety valve opening by hissing in the range of water pressure variation of the network, the user has no means of signaling, while it activates the pump, only sufficient pressure is restored to the sprayer. He can pursue the pumping beyond what is necessary, which is tiring and useless.
  • the present invention therefore aims to achieve a tank filling device of a sprayer phytosanitary products with the water necessary for formation of such a slurry, which ensures this filling with a constant volume of dilution water allowing a precise dosage of the plant protection product contained in the porridge.
  • the present invention also aims to achieve a such a device which simultaneously pressurizes of the tank.
  • the present invention also aims to achieve such a device making it possible to establish in the tank, before use, a sufficient pressure level to spray the entire contents of the tank.
  • the present invention also aims to achieve a such a device which is safe and which avoids pollution possible by overflow of the spray mixture during filling with water.
  • the quantity of water introduced in the tank remains constant regardless of the pressure prevailing in the distribution network used to fill the tank.
  • Product dilution phytosanitary previously introduced into the tank can then be adjusted precisely.
  • the device shown comprises a body 1 designed to be removably attached to a neck 2 a of a tank 2 by any known means, clipping, pinning or screwing, for example.
  • the body 1, of revolution can be designed to be screwed onto the neck of an orifice provided for the introduction of the dose of phytosanitary product to be sprayed.
  • the reservoir 2 is conventionally equipped with a piston pump used to pressurize the reservoir and a spray lance connected to the reservoir by a flexible conduit, these various conventional members not being shown in the drawing.
  • An O-ring 3 seals the mounting of the body 1 of the device on the neck 2 a .
  • the body 1 comprises a nozzle 4 shaped to be connectable to a distribution network, by a "quick" connection for example, and a base 4 o on which is fixed coaxially a part 5 defining with this base a housing 6 for a check valve. -return 7 loaded against its seat 8 by a spring 9 bearing on the part 5.
  • a calibrated valve 10 is mounted on this part 5, between chamber 6 and the interior of the reservoir, holes 11 being drilled radially in this piece to ensure fluid communication between the chamber 6 and the interior of the tank 2 when the valve 10 is moved away from its seat, as shown in FIG. 1.
  • the seat of the valve 10 is constituted by an axial bore 5 a formed in the part 5.
  • the valve 10 has a foot 10 a anchored in a central extension 12 a of a membrane 12 made of an elastic material. This extension passes through a washer 13 attached to the membrane to pinch the foot of the valve.
  • This washer is axially movable in a cage 14 (shown in axial half-section in Figure 1) sealed and fixed on the part 5 to contain a spring 15 loading the washer to an axial position where the valve 10 which it supports is separated from its headquarters 5 a .
  • a sprayer equipped with the device according to the invention When using a sprayer equipped with the device according to the invention, one begins by introducing a dose of a phytosanitary product, liquid or solid, through an orifice of the tank of the sprayer. This can be a specialized orifice, or one which removably receives the pump piston which conventionally equips a portable sprayer of phytosanitary products.
  • the water distribution network is then connected to the reservoir via a flexible conduit provided with a female quick connector, for example, by connecting the latter to the male quick connector 4 of the device according to the invention.
  • a flexible conduit provided with a female quick connector
  • the network water arriving along the arrow F pushes the non-return valve 7 away from its seat, enters the chamber 6, passes between the valve 10 and its seat 5 a on the part 5, and enters the reservoir through the radial holes 11, according to the arrows F 1 .
  • this value predetermined corresponds to a predetermined volume of water, or useful volume, which regulates the dilution rate of the quantity phytosanitary product previously introduced into the tank, at an appropriate value.
  • the pressure acting on the membrane opposing the thrust of the spring, this increasing pressure eventually overcomes this push and causes the valve 10 to close on its seat, for a predetermined air pressure value. Mariotte's law fixes the volume of air then reached, and therefore the volume of water contained in the tank.
  • Sprayers are commonly equipped with a safety valve.
  • the setting of valve 10 will then be set at a pressure value (2 bars, for example) lower than the one that opens the valve (3 bars about).
  • the tared valve of the device according to the invention avoids any risk of overpressure of the tank during water filling, which removes any risk of explosion of the tank and makes it possible to respect national or international regulations which limit the value of the product of the volume of the tank by the maximum pressure likely to prevail there.
  • the valve prevents also any overflow of porridge out of the tank, by a safety valve for example. A cause of pollution of the environment is thus deleted.
  • the device can be provided with means making it possible to vary the amount of water admitted to the tank. he it suffices to modify the calibration of the valve. We reach this result simply using a 14 'screw stop (shown in axial half-section in Figure 1) mounted at the place the bottom of the cage 14 to vary the compression of spring 15. The stop is then graduated in volume of water admitted.
  • FIG. 2 to 4 There are schematically shown in Figures 2 to 4 various variants of the calibrated valve of the device of the present invention, mounted on bodies 1 1 , 1 2 , 1 3 respectively, themselves fixed on the neck 2 a of the tank 2 as the body 1 of the device of Figure 1.
  • a check valve 7 1 slightly different but classic, from that of Figure 1, as well as the arrows F and F 1 of this figure.
  • the calibrated valve takes the form of a cylindrical cap 16 which slides on the wall of a chamber 6 1 itself cylindrical, formed downstream of the non-return valve 7 1 , in the base 4 1 of the body 1 1 .
  • the cap 16 closes this chamber. Seals conventionally equip the interfaces of the cap and the base 4 1 .
  • a spring 15 1 normally holds the cap in a position which coincides with the holes 18, 19 drilled respectively in the wall of the chamber 6 1 and in the cap 16, so that these establish a fluid communication between the chamber 6 1 and the interior of the reservoir 2. If the pressure exerted by the air on the head 16 a of the cap 16 exceeds a predetermined set value, this pressure pushes the cap towards the spring 15 1 and the fluid communication 18, 19 is cut off.
  • the calibrated valve takes the form of a hollow piston 20 sliding inside a chamber 21 formed in the base 4 2 of the body 1 2 of the device, downstream of the non-return valve 7 1 .
  • a nozzle 22 with holes 23 1 , 23 2 is fixed on the open end of this chamber.
  • a spring 15 2 loads the piston against the end piece 22.
  • the piston 20 comprises two bearing surfaces 20 a , 20 b separated axially from one another and conventionally provided with seals. Between these two bearing surfaces, the piston is pierced with holes 20 c . The wall of the chamber 21 is pierced with a hole 21 a .
  • the holes 20 c , 21 a establish fluid communication between the downstream of the non-return valve 7 1 and the tank.
  • the piston 20 approaches the valve 7 1 and the bearing 20 b closes the fluid communication 20 c , 21 a .
  • the calibrated valve also takes the form of a piston 24 sliding inside a chamber 25 attached to the base 4 3 of the body 1 3 of the device, downstream of the valve 7 1 .
  • a nozzle 26 closes the open end of the chamber 25.
  • the piston 24 is full and includes two bearing surfaces 24 a , 24 b with seals, axially spaced from one another.
  • a passage 27 establishes fluid communication between the downstream of the non-return valve 7 1 and a part of the chamber 25 located between the two bearing surfaces.
  • a spring 15 3 loads the piston 24 against the end piece 26. In this position, the bearing surface 24 b clears a passage 28 in the wall of the chamber 25. Water entering along the arrow F into the body 1 3 can then cross the passages 27 and 28 to enter the reservoir 2.
  • the air pressure which acts on the seat 24 a of the piston 24 exceeds a predetermined set value, the spring 15 3 is crushed and the seat 24 b is closed the chamber 25 by cutting the communication between the passages 27 and 28.
  • the device according to the invention allows achieve the goals set, namely to ensure a filling of the tank with a quantity of water fixed in advance, allowing precise adjustment of the concentration of a phytosanitary product in this amount of water, while ensuring an automatic pressurization of the tank and further preventing the occurrence of overpressure in the tank during filling and therefore the consequences possible damage from such overpressure, in particular deterioration of the tank and overflow of the spray solution out of the tank.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Catching Or Destruction (AREA)
  • Safety Valves (AREA)
  • Nozzles (AREA)

Description

La présente invention est relative à un dispositif de remplissage du réservoir d'un pulvérisateur de produits phytosanitaires en solution aqueuse, et, plus particulièrement, à un tel dispositif comprenant des moyens de raccordement à une source d'eau sous pression et un clapet anti-retour placé dans ces moyens de raccordement et monté passant de la source vers le réservoir.The present invention relates to a device for filling a product sprayer tank phytosanitary in aqueous solution, and, more particularly, to such a device comprising means connection to a pressurized water source and a non-return valve placed in these connection means and mounted passing from the source to the tank.

On connaít un pulvérisateur de ce type, conçu pour être utilisé par des jardiniers amateurs ou professionnels. Ce pulvérisateur comprend classiquement une lance de pulvérisation alimentée par un réservoir sous pression contenant une solution aqueuse d'un produit phytosanitaire. Une dose de ce produit étant introduite dans le réservoir, celui-ci est fermé et raccordé au réseau de distribution d'eau, par exemple au moyen d'un raccord "rapide". Sous la pression de l'eau du réseau, le clapet anti-retour s'ouvre et le réservoir se remplit jusqu'à ce que l'air initialement contenu dans le réservoir soit comprimé à la pression qui équilibre celle de l'eau du réseau.We know a sprayer of this type, designed to be used by amateur or professional gardeners. This sprayer conventionally comprises a lance of spray powered by a pressure tank containing an aqueous solution of a phytosanitary product. A dose of this product being introduced into the tank, it is closed and connected to the distribution network of water, for example by means of a "quick" connection. Under the mains water pressure, the non-return valve opens and the tank fills until the air initially contained in the tank is compressed to the pressure which balances that of mains water.

Ce dispositif autorise ainsi un remplissage commode du réservoir tout en comprimant l'air qui y est emprisonné. Malheureusement, la pression d'eau des réseaux de distribution varie largement, couramment de 2 à 10 bars. On conçoit que, conformément à la loi de Mariotte, le volume de l'air comprimé dans le réservoir va alors être fonction de la pression de l'eau du réseau. Il en résulte que le volume d'eau contenu dans le réservoir varie avec cette pression. Cette variation perturbe alors le dosage du produit phytosanitaire initialement introduit, ce qui peut être très dommageable en ce qui concerne l'efficacité du traitement des végétaux concernés.This device thus allows convenient filling of the tank while compressing the air trapped there. Unfortunately, the water pressure of the distribution varies widely, commonly from 2 to 10 bars. We understands that, in accordance with Mariotte's law, the volume of the compressed air in the tank will then be a function of network water pressure. As a result, the volume of water in the tank varies with this pressure. This variation then disrupts the dosage of the product. phytosanitary initially introduced, which can be very harmful with regard to the effectiveness of the treatment of the plants concerned.

En outre, si la pression d'eau du réseau est très supérieure à la pression de consigne prévue pour le réservoir, on risque de porter celui-ci à une pression excessive, ce qui peut être dangereux. Après un certain temps de pulvérisation, la pression dans le réservoir peut retomber à un niveau trop bas et l'utilisateur doit alors actionner une pompe manuelle classiquement intégrée au pulvérisateur pour faire remonter la pression dans le réservoir. Le pulvérisateur du type décrit ci-dessus excluant la présence d'une soupape de sécurité s'ouvrant en chuintant dans le domaine de variation de la pression d'eau du réseau, l'utilisateur ne dispose d'aucun moyen signalant, alors qu'il actionne la pompe, qu'une pression suffisante est rétablie dans le pulvérisateur. Il peut poursuivre le pompage au-delà de ce qui est nécessaire, ce qui est fatiguant et inutile.In addition, if the network water pressure is very higher than the set pressure for the tank, there is a risk of bringing it to pressure excessive, which can be dangerous. After a certain spraying time, the pressure in the tank can fall back too low and the user must then operate a manual pump conventionally integrated into the sprayer to build up pressure in the tank. The sprayer of the type described above excluding the presence of a safety valve opening by hissing in the range of water pressure variation of the network, the user has no means of signaling, while it activates the pump, only sufficient pressure is restored to the sprayer. He can pursue the pumping beyond what is necessary, which is tiring and useless.

La présente invention a donc pour but de réaliser un dispositif de remplissage du réservoir d'un pulvérisateur de produits phytosanitaires avec l'eau nécessaire à la formation d'une telle bouillie, qui assure ce remplissage avec un volume d'eau de dilution constant autorisant un dosage précis du produit phytosanitaire contenu dans la bouillie.The present invention therefore aims to achieve a tank filling device of a sprayer phytosanitary products with the water necessary for formation of such a slurry, which ensures this filling with a constant volume of dilution water allowing a precise dosage of the plant protection product contained in the porridge.

La présente invention a aussi pour but de réaliser un tel dispositif qui assure simultanément une mise en pression du réservoir.The present invention also aims to achieve a such a device which simultaneously pressurizes of the tank.

La présente invention a également pour but de réaliser un tel dispositif permettant d'établir dans le réservoir, avant une utilisation, un niveau de pression suffisant pour assurer la pulvérisation de l'intégralité du contenu du réservoir.The present invention also aims to achieve such a device making it possible to establish in the tank, before use, a sufficient pressure level to spray the entire contents of the tank.

La présente invention a encore pour but de réaliser un tel dispositif qui soit sûr et qui évite des pollutions éventuelles par débordement de la bouillie lors du remplissage en eau.The present invention also aims to achieve a such a device which is safe and which avoids pollution possible by overflow of the spray mixture during filling with water.

On atteint ces buts de l'invention, ainsi que d'autres qui apparaítront à la lecture de la description qui va suivre, avec un dispositif du type décrit en préambule de la présente description, remarquable en ce qu'il comprend un moyen de clapet taré monté entre le clapet anti-retour et le réservoir, dans le passage de l'eau entrant dans le réservoir, ce clapet étant sensible à la pression dans le réservoir pour couper l'alimentation en eau du réservoir quand cette pression atteint une valeur prédéterminée.These objects of the invention are achieved, as well as others which will appear on reading the description which will follow, with a device of the type described in the preamble to the present description, remarkable in that it includes a calibrated valve means mounted between the non-return valve and the reservoir, in the passage of water entering the tank, this valve being sensitive to the pressure in the tank to shut off the water supply to the tank when this pressure reaches a predetermined value.

Grâce à ce clapet taré, la quantité d'eau introduite dans le réservoir reste constante, quelle que soit la pression régnant dans le réseau de distribution utilisée pour remplir le réservoir. La dilution du produit phytosanitaire préalablement introduit dans le réservoir peut alors être ajustée de manière précise.Thanks to this calibrated valve, the quantity of water introduced in the tank remains constant regardless of the pressure prevailing in the distribution network used to fill the tank. Product dilution phytosanitary previously introduced into the tank can then be adjusted precisely.

D'autres caractéristiques et avantages de la présente invention apparaítront à la lecture de la description qui va suivre et à l'examen du dessin annexé dans lequel :

  • la figure 1 est une vue en coupe axiale d'un premier mode de réalisation du dispositif suivant l'invention, et
  • les figures 2 à 4 sont des vues schématiques en coupe axiale de variantes du dispositif de la figure 1.
Other characteristics and advantages of the present invention will appear on reading the description which follows and on examining the appended drawing in which:
  • FIG. 1 is a view in axial section of a first embodiment of the device according to the invention, and
  • Figures 2 to 4 are schematic views in axial section of variants of the device of Figure 1.

On se réfère à la figure 1 du dessin annexé où il apparaít que le dispositif représenté comprend un corps 1 conçu pour se fixer amoviblement sur un col 2a d'un réservoir 2 par tout moyen connu, clippage, goupillage ou vissage, par exemple. A titre illustratif et non limitatif, le corps 1, de révolution, peut être conçu pour se visser sur le col d'un orifice prévu pour l'introduction de la dose de produit phytosanitaire à pulvériser. Le réservoir 2 est classiquement équipé d'une pompe à piston servant à mettre le réservoir sous pression et d'une lance de pulvérisation raccordée au réservoir par un conduit souple, ces divers organes classiques n'étant pas représentés au dessin.Referring to Figure 1 of the accompanying drawing where it appears that the device shown comprises a body 1 designed to be removably attached to a neck 2 a of a tank 2 by any known means, clipping, pinning or screwing, for example. By way of illustration and not limitation, the body 1, of revolution, can be designed to be screwed onto the neck of an orifice provided for the introduction of the dose of phytosanitary product to be sprayed. The reservoir 2 is conventionally equipped with a piston pump used to pressurize the reservoir and a spray lance connected to the reservoir by a flexible conduit, these various conventional members not being shown in the drawing.

Un joint torique 3 assure l'étanchéité du montage du corps 1 du dispositif sur le col 2a. Le corps 1 comporte un embout 4 conformé pour être connectable à un réseau de distribution, par un raccord "rapide" par exemple, et une base 4o sur laquelle est fixée coaxialement une pièce 5 définissant avec cette base un logement 6 pour un clapet anti-retour 7 chargé contre son siège 8 par un ressort 9 en appui sur la pièce 5.An O-ring 3 seals the mounting of the body 1 of the device on the neck 2 a . The body 1 comprises a nozzle 4 shaped to be connectable to a distribution network, by a "quick" connection for example, and a base 4 o on which is fixed coaxially a part 5 defining with this base a housing 6 for a check valve. -return 7 loaded against its seat 8 by a spring 9 bearing on the part 5.

Suivant la présente invention, un clapet taré 10 est monté sur cette pièce 5, entre la chambre 6 et l'intérieur du réservoir, des trous 11 étant percés radialement dans cette pièce pour assurer une communication de fluide entre la chambre 6 et l'intérieur du réservoir 2 quand le clapet 10 est écarté de son siège, comme représenté à la figure 1.According to the present invention, a calibrated valve 10 is mounted on this part 5, between chamber 6 and the interior of the reservoir, holes 11 being drilled radially in this piece to ensure fluid communication between the chamber 6 and the interior of the tank 2 when the valve 10 is moved away from its seat, as shown in FIG. 1.

Le siège du clapet 10 est constitué par un perçage axial 5a formé dans la pièce 5. Le clapet 10 présente un pied 10a ancré dans une extension centrale 12a d'une membrane 12 en un matériau élastique. Cette extension traverse une rondelle 13 accolée à la membrane pour pincer le pied du clapet. Cette rondelle est mobile axialement dans une cage 14 (représentée en demi-coupe axiale à la figure 1) étanche et fixée sur la pièce 5 pour contenir un ressort 15 chargeant la rondelle vers une position axiale où le clapet 10 qu'elle supporte est écarté de son siège 5a.The seat of the valve 10 is constituted by an axial bore 5 a formed in the part 5. The valve 10 has a foot 10 a anchored in a central extension 12 a of a membrane 12 made of an elastic material. This extension passes through a washer 13 attached to the membrane to pinch the foot of the valve. This washer is axially movable in a cage 14 (shown in axial half-section in Figure 1) sealed and fixed on the part 5 to contain a spring 15 loading the washer to an axial position where the valve 10 which it supports is separated from its headquarters 5 a .

Lors de l'utilisation d'un pulvérisateur équipé du dispositif suivant l'invention, on commence par introduire une dose d'un produit phytosanitaire, liquide ou solide, par un orifice du réservoir du pulvérisateur. Celui-ci peut être un orifice spécialisé, ou celui qui reçoit amoviblement le piston de la pompe qui équipe classiquement un pulvérisateur portable de produits phytosanitaires. On raccorde ensuite le réseau de distribution d'eau au réservoir par l'intermédiaire d'un conduit souple muni d'un raccord rapide femelle, par exemple, en branchant ce dernier sur le raccord rapide mâle 4 du dispositif suivant l'invention. Bien entendu, les positions de ces raccords rapides, femelle et mâle, pourraient être inversées. L'eau du réseau arrivant suivant la flèche F pousse le clapet anti-retour 7 à l'écart de son siège, pénètre dans la chambre 6, passe entre le clapet 10 et son siège 5a sur la pièce 5, et rentre dans le réservoir par les trous radiaux 11, suivant les flèches F1.When using a sprayer equipped with the device according to the invention, one begins by introducing a dose of a phytosanitary product, liquid or solid, through an orifice of the tank of the sprayer. This can be a specialized orifice, or one which removably receives the pump piston which conventionally equips a portable sprayer of phytosanitary products. The water distribution network is then connected to the reservoir via a flexible conduit provided with a female quick connector, for example, by connecting the latter to the male quick connector 4 of the device according to the invention. Of course, the positions of these quick couplings, female and male, could be reversed. The network water arriving along the arrow F pushes the non-return valve 7 away from its seat, enters the chamber 6, passes between the valve 10 and its seat 5 a on the part 5, and enters the reservoir through the radial holes 11, according to the arrows F 1 .

La quantité d'eau reçue par le réservoir croissant, la pression de l'eau et de l'air enfermé au-dessus de la surface libre de l'eau croít. Cette pression est transmise, à travers les trous 11, à la face de la membrane 12 opposée à celle qui reçoit la poussée du ressort 15. Cette poussée est réglée ou tarée pour maintenir le clapet 10 ouvert aussi longtemps que la pression dans le réservoir n'atteint pas une valeur prédéterminée. Suivant l'invention, cette valeur prédéterminée correspond à un volume d'eau prédéterminé, ou volume utile, qui règle le taux de dilution de la quantité du produit phytosanitaire préalablement introduit dans le réservoir, à une valeur appropriée. La pression agissant sur la membrane s'opposant à la poussée du ressort, cette pression croissante finit par surmonter cette poussée et provoque la fermeture du clapet 10 sur son siège, pour une valeur de pression d'air prédéterminée. La loi de Mariotte fixe le volume d'air alors atteint, et donc le volume d'eau contenu dans le réservoir.The amount of water received by the increasing reservoir, the water pressure and trapped air above the free surface of the water increases. This pressure is transmitted, through the holes 11, at the opposite face of the membrane 12 to that which receives the thrust of the spring 15. This thrust is set or tared to keep the valve 10 open too as long as the pressure in the tank does not reach a predetermined value. According to the invention, this value predetermined corresponds to a predetermined volume of water, or useful volume, which regulates the dilution rate of the quantity phytosanitary product previously introduced into the tank, at an appropriate value. The pressure acting on the membrane opposing the thrust of the spring, this increasing pressure eventually overcomes this push and causes the valve 10 to close on its seat, for a predetermined air pressure value. Mariotte's law fixes the volume of air then reached, and therefore the volume of water contained in the tank.

Les pulvérisateurs sont couramment équipés d'une soupape de sécurité. Le tarage du clapet 10 sera alors réglé à une valeur de pression (2 bars, par exemple) inférieure à celle qui provoque l'ouverture de la soupape (soit 3 bars environ).Sprayers are commonly equipped with a safety valve. The setting of valve 10 will then be set at a pressure value (2 bars, for example) lower than the one that opens the valve (3 bars about).

Le remplissage du réservoir avec un volume d'eau fixé étant ainsi assuré, on débranche l'alimentation d'eau et on peut éventuellement accroítre la pression d'air dans le réservoir à l'aide de la pompe manuelle qui équipe classiquement le pulvérisateur. Le nombre de coups de piston à fournir est évidemment réduit par la mise en pression initiale établie par l'eau du réseau, ce qui soulage d'autant l'utilisateur. La soupape de sécurité prévient l'utilisateur, par son chuintement, de ce que la pression de consigne est atteinte. Celle-ci peut être réglée à une valeur permettant de vider complètement le réservoir au cours de la pulvérisation ultérieure, sans avoir à actionner de nouveau la pompe manuelle. C'est là un avantage marquant sur le dispositif de la technique antérieure décrit en préambule de la présente description, qui ne permet pas de fixer à des valeurs prédéterminées la pression atteinte en fin de remplissage, ou après un actionnement manuel de la pompe.Filling the tank with a fixed volume of water thus being assured, the water supply is disconnected and can possibly increase the air pressure in the tank using the manual pump fitted conventionally the sprayer. The number of piston strokes to supply is obviously reduced by pressurization initial established by the mains water, which relieves all the more the user. Safety valve warns the user, by his hissing, that the pressure of setpoint is reached. This can be set to a value allowing the tank to be completely emptied at during subsequent spraying, without having to operate the hand pump again. This is a significant advantage on the device of the prior art described in preamble to this description, which does not allow fix the pressure reached at predetermined values end of filling, or after manual activation of the pump.

En cours de pulvérisation, la pression dans le réservoir chute, ce qui entraíne une décompression du ressort 15 et, à la longue, une remontée du clapet 10 qui s'écarte de son siège. Cependant, le réseau étant débranché, la pression du réservoir qui est alors transmise par les trous 11 et le clapet 10 dans la chambre 6 maintient, en coopération avec le ressort 9, le clapet anti-retour 7 fermé. La bouillie et l'air enfermés dans le réservoir ne peuvent alors s'échapper au dehors par le clapet anti-retour 7.During spraying, the pressure in the tank drops, causing decompression of the spring 15 and, in the long run, a rise in valve 10 which departs from his seat. However, the network being disconnected, the tank pressure which is then transmitted by the holes 11 and the valve 10 in the chamber 6 maintains, in cooperation with spring 9, non-return valve 7 closed. Porridge and air trapped in the tank does not can then escape outside through the non-return valve 7.

On remarquera en outre que le clapet taré du dispositif suivant l'invention évite tout risque de mise en surpression du réservoir pendant le remplissage en eau, ce qui supprime tout risque d'explosion du réservoir et permet de respecter les réglementations nationales ou internationales qui limitent la valeur du produit du volume du réservoir par la pression maximale susceptible d'y régner. Le clapet empêche aussi tout débordement de bouillie hors du réservoir, par une soupape de sécurité par exemple. Une cause de pollution de l'environnement est ainsi supprimée.It will also be noted that the tared valve of the device according to the invention avoids any risk of overpressure of the tank during water filling, which removes any risk of explosion of the tank and makes it possible to respect national or international regulations which limit the value of the product of the volume of the tank by the maximum pressure likely to prevail there. The valve prevents also any overflow of porridge out of the tank, by a safety valve for example. A cause of pollution of the environment is thus deleted.

Le dispositif peut être muni de moyens permettant de faire varier la quantité d'eau admise dans le réservoir. Il suffit pour cela de modifier le tarage du clapet. On atteint ce résultat simplement à l'aide d'une butée vissante 14' (représentée en demi-coupe axiale à la figure 1) montée à la place du fond de la cage 14 pour faire varier la compression du ressort 15. La butée est alors graduée en volume d'eau admis.The device can be provided with means making it possible to vary the amount of water admitted to the tank. he it suffices to modify the calibration of the valve. We reach this result simply using a 14 'screw stop (shown in axial half-section in Figure 1) mounted at the place the bottom of the cage 14 to vary the compression of spring 15. The stop is then graduated in volume of water admitted.

On a représenté schématiquement aux figures 2 à 4 diverses variantes du clapet taré du dispositif de la présente invention, montées sur des corps 11, 12, 13 respectivement, eux-mêmes fixés sur le col 2a du réservoir 2 comme le corps 1 du dispositif de la figure 1. On retrouve sur les figures 2 à 4 un clapet anti-retour 71, légèrement différent mais classique, de celui de la figure 1, ainsi que les flèches F et F1 de cette figure.There are schematically shown in Figures 2 to 4 various variants of the calibrated valve of the device of the present invention, mounted on bodies 1 1 , 1 2 , 1 3 respectively, themselves fixed on the neck 2 a of the tank 2 as the body 1 of the device of Figure 1. Found in Figures 2 to 4 a check valve 7 1 , slightly different but classic, from that of Figure 1, as well as the arrows F and F 1 of this figure.

A la figure 2, le clapet taré prend la forme d'un capuchon cylindrique 16 qui coulisse sur la paroi d'une chambre 61 elle-même cylindrique, formée en aval du clapet anti-retour 71, dans la base 41 du corps 11. Le capuchon 16 ferme cette chambre. Des joints d'étanchéité équipent classiquement les interfaces du capuchon et de la base 41. Un ressort 151 tient normalement le capuchon dans une position qui fait coïncider des trous 18, 19 percés respectivement dans la paroi de la chambre 61 et dans le capuchon 16, de manière que ceux-ci établissent une communication de fluide entre la chambre 61 et l'intérieur du réservoir 2. Si la pression exercée par l'air sur la tête 16a du capuchon 16 dépasse une valeur prédéterminée de consigne, cette pression repousse le capuchon vers le ressort 151 et la communication de fluide 18, 19 se trouve coupée.In FIG. 2, the calibrated valve takes the form of a cylindrical cap 16 which slides on the wall of a chamber 6 1 itself cylindrical, formed downstream of the non-return valve 7 1 , in the base 4 1 of the body 1 1 . The cap 16 closes this chamber. Seals conventionally equip the interfaces of the cap and the base 4 1 . A spring 15 1 normally holds the cap in a position which coincides with the holes 18, 19 drilled respectively in the wall of the chamber 6 1 and in the cap 16, so that these establish a fluid communication between the chamber 6 1 and the interior of the reservoir 2. If the pressure exerted by the air on the head 16 a of the cap 16 exceeds a predetermined set value, this pressure pushes the cap towards the spring 15 1 and the fluid communication 18, 19 is cut off.

A la figure 3, le clapet taré prend la forme d'un piston creux 20 coulissant à l'intérieur d'une chambre 21 formée dans la base 42 du corps 12 du dispositif, en aval du clapet anti-retour 71. Un embout 22 traversé de trous 231, 232 est fixé sur l'extrémité ouverte de cette chambre. Un ressort 152 charge le piston contre l'embout 22. Le piston 20 comprend deux portées 20a, 20b écartées axialement l'une de l'autre et munies classiquement de joints d'étanchéité. Entre ces deux portées, le piston est percé de trous 20c. La paroi de la chambre 21 est percée d'un trou 21a. Quand la pression d'air dans le réservoir est inférieure à une valeur prédéterminée, les trous 20c, 21a établissent une communication de fluide entre l'aval du clapet anti-retour 71 et le réservoir. Quand la pression d'air passe au-dessus de cette valeur, le piston 20 se rapproche du clapet 71 et la portée 20b ferme la communication de fluide 20c, 21a.In FIG. 3, the calibrated valve takes the form of a hollow piston 20 sliding inside a chamber 21 formed in the base 4 2 of the body 1 2 of the device, downstream of the non-return valve 7 1 . A nozzle 22 with holes 23 1 , 23 2 is fixed on the open end of this chamber. A spring 15 2 loads the piston against the end piece 22. The piston 20 comprises two bearing surfaces 20 a , 20 b separated axially from one another and conventionally provided with seals. Between these two bearing surfaces, the piston is pierced with holes 20 c . The wall of the chamber 21 is pierced with a hole 21 a . When the air pressure in the tank is less than a predetermined value, the holes 20 c , 21 a establish fluid communication between the downstream of the non-return valve 7 1 and the tank. When the air pressure passes above this value, the piston 20 approaches the valve 7 1 and the bearing 20 b closes the fluid communication 20 c , 21 a .

A la figure 4, le clapet taré prend aussi la forme d'un piston 24 coulissant à l'intérieur d'une chambre 25 rapportée dans la base 43 du corps 13 du dispositif, en aval du clapet 71. Un embout 26 ferme l'extrémité ouverte de la chambre 25. Le piston 24 est plein et comprend deux portées 24a, 24b à joints d'étanchéité, écartées axialement l'une de l'autre. Un passage 27 établit une communication de fluide entre l'aval du clapet anti-retour 71 et une partie de la chambre 25 située entre les deux portées. Un ressort 153 charge le piston 24 contre l'embout 26. Dans cette position, la portée 24b dégage un passage 28 dans la paroi de la chambre 25. De l'eau entrant selon la flèche F dans le corps 13 peut alors traverser les passages 27 et 28 pour entrer dans le réservoir 2. Quand la pression d'air qui agit sur la portée 24a du piston 24 dépasse une valeur prédéterminée de consigne, le ressort 153 s'écrase et la portée 24b vient obturer la chambre 25 en coupant la communication entre les passages 27 et 28.In FIG. 4, the calibrated valve also takes the form of a piston 24 sliding inside a chamber 25 attached to the base 4 3 of the body 1 3 of the device, downstream of the valve 7 1 . A nozzle 26 closes the open end of the chamber 25. The piston 24 is full and includes two bearing surfaces 24 a , 24 b with seals, axially spaced from one another. A passage 27 establishes fluid communication between the downstream of the non-return valve 7 1 and a part of the chamber 25 located between the two bearing surfaces. A spring 15 3 loads the piston 24 against the end piece 26. In this position, the bearing surface 24 b clears a passage 28 in the wall of the chamber 25. Water entering along the arrow F into the body 1 3 can then cross the passages 27 and 28 to enter the reservoir 2. When the air pressure which acts on the seat 24 a of the piston 24 exceeds a predetermined set value, the spring 15 3 is crushed and the seat 24 b is closed the chamber 25 by cutting the communication between the passages 27 and 28.

Tous les modes de réalisation décrits de l'invention peuvent être fabriqués de manière à former un tout qui peut être monté amoviblement sur le réservoir du pulvérisateur ou, au contraire, faire partie intégrante de ce réservoir.All the described embodiments of the invention can be made to form a whole that can be removably mounted on the spray tank or, on the contrary, be an integral part of this reservoir.

Il apparaít maintenant que, tant dans le mode de réalisation de la figure 1 que dans les variantes des figures 2 à 4, le dispositif suivant l'invention permet bien d'atteindre les buts fixés, à savoir assurer un remplissage du réservoir avec une quantité d'eau fixée à l'avance, autorisant un réglage précis de la concentration d'un produit phytosanitaire dans cette quantité d'eau, tout en assurant une mise en pression automatique du réservoir et en empêchant en outre l'apparition d'une surpression dans le réservoir pendant le remplissage et donc les conséquences dommageables éventuelles d'une telle surpression, notamment détérioration du réservoir et débordement de la bouillie hors du réservoir.It now appears that both in the mode of embodiment of FIG. 1 only in the variants of Figures 2 to 4, the device according to the invention allows achieve the goals set, namely to ensure a filling of the tank with a quantity of water fixed in advance, allowing precise adjustment of the concentration of a phytosanitary product in this amount of water, while ensuring an automatic pressurization of the tank and further preventing the occurrence of overpressure in the tank during filling and therefore the consequences possible damage from such overpressure, in particular deterioration of the tank and overflow of the spray solution out of the tank.

Claims (12)

  1. A device for filling a reservoir (2) of a spray for plant-protection products in aqueous solution, comprising means (4) for connecting the reservoir to a source of water under pressure and a nonreturn valve (7 ;71) placed in these connecting means (4) and mounted to allow passage from the source toward the reservoir (2), characterized in that it comprises a calibrated valve means (10; 16; 20; 24) mounted between the nonreturn valve (7 ; 71) and the reservoir (2) in the passage of the water entering the reservoir (2), this valve (10; 16; 20; 24) being sensitive to the pressure in the reservoir (2) so as to cut off the water supply to the reservoir (2) when this pressure reaches a predetermined value.
  2. The device as claimed in claim 1, characterized in that the calibrated valve means comprises a valve (10) mounted on a membrane (12), one of the faces of the membrane being in communication with the inside of the reservoir (2) while the other face is isolated from this reservoir by a leakproof cage (14) containing a spring (15) urging the other face of the membrane (12) so as to hold the valve (10) away from its seat when the air pressure in the reservoir (2) is below said predetermined value.
  3. The device as claimed in claim 2, characterized in that said spring (15) presses against a washer (13) closely attached to the membrane (12), the calibrated valve (10) having a stem (10a) anchored in a central extension (12a) of the membrane (12) which passes through the washer.
  4. The device as claimed in claim 1, characterized in that the calibrated valve means assumes the form of a cylindrical cap (16) sliding on the wall of a chamber (61) of the device formed downstream of the nonreturn valve (71) and closed by the cap, the cap (16) being urged elastically by a spring (151) into a position which establishes a fluid communication (18, 19) between said chamber (6,) and the inside of the reservoir (2) when the pressure therein is below said predetermined value, said communication being closed off when the pressure is above said value.
  5. The device as claimed in claim 1, characterized in that the calibrated valve means assumes the form of a sliding piston (20; 24) inside a chamber (21; 25) arranged downstream of the nonreturn valve (71), the piston (20; 24) defining a passage for the water between the nonreturn valve (71) and the reservoir (2), the piston (20; 24) being loaded by a spring (152; 153) into a position in which the water flows from this passage into the reservoir (2) through holes (20c, 21a; 27, 28) pierced in the piston (20; 24) and/or in the wall of the chamber, this piston (20; 24) moving away from this position when the pressure in the reservoir (2) exceeds said predetermined value in order to cut off the fluid communication established by these holes (20c, 21a; 27, 28).
  6. Device as claimed in claim 5, characterized in that the piston (20) is hollow and constitutes part of the fluid communication established between the nonreturn valve (71) and the inside of the reservoir (2).
  7. Device as claimed in claim 5, characterized in that the piston (24) is solid and has two lands (24a; 24b) separated axially from one another, the space lying between the lands being placed in fluid communication with the downstream of the nonreturn valve (71), one (24b) of the lands cutting off any communication between this space and the inside of the reservoir (2) when the pressure prevailing therein exceeds said predetermined value.
  8. Device as claimed in anyone of claims 1 to 7, characterized in that the calibrated valve means is fitted with means (14') for adjusting the calibration.
  9. Device as claimed in anyone of the preceding claims, characterized in that it forms a whole designed to be mounted removably on the reservoir of a spray.
  10. Device as claimed in claim 9, characterized in that it is equipped with means for mounting on an orifice of the reservoir intended for the introduction of the plant-protection product.
  11. Device as claimed in anyone of claims 1 to 9, characterized in that it is incorporated into a spray.
  12. Device as claimed in claim 11, characterized in that the calibrated valve means (10; 16; 20; 24) is mounted in the base (41) of a body (1; 11) integral with the reservoir (2).
EP96401855A 1995-09-01 1996-08-29 Device for filling a reservoir of a device for pulverising phytosanitary products Expired - Lifetime EP0761534B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9510309 1995-09-01
FR9510309A FR2738215B1 (en) 1995-09-01 1995-09-01 DEVICE FOR FILLING THE TANK OF A PHYTOSANITARY PRODUCT SPRAYER

Publications (2)

Publication Number Publication Date
EP0761534A1 EP0761534A1 (en) 1997-03-12
EP0761534B1 true EP0761534B1 (en) 1999-06-30

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EP96401855A Expired - Lifetime EP0761534B1 (en) 1995-09-01 1996-08-29 Device for filling a reservoir of a device for pulverising phytosanitary products

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US (1) US5727605A (en)
EP (1) EP0761534B1 (en)
DE (1) DE69603054T2 (en)
ES (1) ES2135191T3 (en)
FR (1) FR2738215B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358085C5 (en) * 2003-12-10 2012-06-28 Danfoss A/S Refrigerant valve assembly
IL169872A (en) * 2005-07-25 2010-11-30 Zvi Einav Fluid pressure regulator with no-drain valve and a method used therein

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2053931A (en) * 1934-11-03 1936-09-08 Patent Dev Company Ltd Pressure control valve
US2608373A (en) * 1946-08-06 1952-08-26 Bridgeport Brass Co Filling apparatus for containers
US4630642A (en) * 1984-12-03 1986-12-23 Tom Mcguane Industries, Inc. Check valve and water injection systems and fuel systems utilizing the same
US4953593A (en) * 1989-05-31 1990-09-04 Edwards William A Fluid mixing apparatus for producing variably carbonated water

Also Published As

Publication number Publication date
US5727605A (en) 1998-03-17
FR2738215B1 (en) 1997-11-14
ES2135191T3 (en) 1999-10-16
EP0761534A1 (en) 1997-03-12
DE69603054D1 (en) 1999-08-05
FR2738215A1 (en) 1997-03-07
DE69603054T2 (en) 1999-10-21

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