EP2074392A1 - Dispositif de distribution pour liquides - Google Patents

Dispositif de distribution pour liquides

Info

Publication number
EP2074392A1
EP2074392A1 EP07818592A EP07818592A EP2074392A1 EP 2074392 A1 EP2074392 A1 EP 2074392A1 EP 07818592 A EP07818592 A EP 07818592A EP 07818592 A EP07818592 A EP 07818592A EP 2074392 A1 EP2074392 A1 EP 2074392A1
Authority
EP
European Patent Office
Prior art keywords
liquid
orifice
piston
valve
dispensed
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.)
Withdrawn
Application number
EP07818592A
Other languages
German (de)
English (en)
Inventor
Klemenz Josef Andermatt
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.)
Syngenta Participations AG
Original Assignee
Syngenta Participations AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Syngenta Participations AG filed Critical Syngenta Participations AG
Priority to EP07818592A priority Critical patent/EP2074392A1/fr
Publication of EP2074392A1 publication Critical patent/EP2074392A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/001—Means for regulating or setting the meter for a predetermined quantity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
    • G01F11/04—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the free-piston type
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F13/00—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups
    • G01F13/006—Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups measuring volume in function of time

Definitions

  • the present invention relates to a dispensing device suitable for repeatedly dispensing a predetermined amount of liquid which is supplied to the device under pressure, in which the amount of liquid dispensed by the device is determined by a timer.
  • One method for repeatedly applying a predetermined volume of liquid, such as solutions of agricultural chemicals, to a plant is to use a graduated beaker or a similar kind of container to measure the solution.
  • This method allows for precise measurement of a liquid and allows the liquid to be applied topically, for example to the base of the plant, if desired.
  • the advantage of this method is that the equipment is very inexpensive and that the volumes can readily be changed as required.
  • the drawback of this method is that it is very time-consuming and that the operation of pouring a liquid from a heavy canister, which is commonplace for agricultural chemicals, into a beaker can lead to injury of the back, the lower lumbar region, the neck and the wrist. Furthermore, there is a considerable risk of exposure to the agricultural chemicals as the pouring action can result in splashing.
  • Dispensing devices which deliver a predetermined volume of liquid, typically solutions of agricultural chemicals, are known and are described, for example, in US 4,650,099 and US 4,821,927. These patents disclose dispensing devices which deliver a liquid which is supplied to the device under pressure within a narrow range of predetermined volumes, typically from about 1 to 20 ml.
  • the principle used is that of positive displacement of the liquid which is essentially the same as the working of a simple syringe comprising of a plunger in a barrel. In a syringe the plunger is pulled back to load a liquid into the barrel. The liquid is then forced out of the barrel by actuating the plunger.
  • the invention provides a device for dispensing a predetermined amount of liquid which is supplied to the device under pressure, in which the amount of liquid dispensed by the device is determined by a timer.
  • a timer keeps the flow to the outlet valve "open", for a predetermined length of time thus determining the amount of liquid to be dispensed by the device.
  • the presence of an orifice against which the piston has to pump the liquid has the effect that the movement of the piston from one extreme position (the open position) to the other extreme position (the closed position) is hampered.
  • the liquid as soon as it has been pumped through the orifice, is directed so as to allow it to move away from the orifice, preferably creating minimal back pressure on the flow through the orifice.
  • the flow of the liquid after it has been pumped through the orifice is directed so as to allow it to be used in the spray application, preferably it is directed so as to be joined with the main volume of spray liquid metered out for dispensing. This can be contrasted with the devices described in US 5,451,030 and DE 4,323,063 where the liquid trapped in one part of the internal chamber needs to move into the other part of the internal chamber.
  • the damping mechanism is adjustable so as to vary the damping effect.
  • the amount of resistance to the movement of the piston from one extreme position (the open position) to the other extreme position (the closed position) as the liquid is displaced from the cylinder can be adjusted by restricting the flow of the liquid displaced from the cylinder. This can be achieved by various means, for example by introducing a variable orifice (a throttle valve) at the end of the cylinder so that the flow of fluid from the cylinder is restricted.
  • the size of the orifice is adjustable so as to vary the damping effect.
  • the outlet valve is situated in the outlet channel.
  • the outlet valve is a "normally closed" 2/2 valve.
  • the trigger valve and the outlet valve are switched in parallel.
  • the trigger valve and the outlet valve are switched in parallel and assume the opposite settings.
  • the trigger valve is set to "open”, that is the liquid can flow via the inlet channel from the inlet orifice to the cylinder but not to the outlet orifice
  • the outlet valve is set to "closed”, that is the liquid cannot flow via the outlet channel from the inlet orifice to the outlet orifice, when the trigger is not engaged, and conversely, the trigger valve is set to
  • the outlet valve is set to "open”, that is the liquid can flow via the outlet channel from the inlet orifice to the outlet orifice, when the trigger is engaged.
  • the trigger is engaged and disengaged by the operator.
  • the trigger can be engaged and disengaged by other means.
  • Figure 1 is an axial section of the dispensing device for liquids in its initial position. That is the position the device assumes if it is disconnected from a source of liquid.
  • Figure 2 is an axial section of the dispensing device for liquids before discharge. This is the position the device assumes when it is connected to a source of liquid under pressure.
  • Figure 3 is an axial section of the dispensing device for liquids during discharge. This is the position the device assumes when the trigger has been actuated.
  • Block 1 is a block of material, preferably made out of metal.
  • block 1 is of a flattened cylindrical shape. Reference is made to the eilipticai aspect and the axial aspect of block 1.
  • Cylinder 2 is a cavity located centrally in block 1.
  • Inlet orifice 3 is a cavity located towards one of the elliptical aspects of block 1.
  • Outlet orifice 4 is a cavity located towards the other elliptical aspect of block 1, preferably opposite to inlet orifice 3.
  • the diameters of inlet orifice 3 and outlet orifice 4 are preferably the same.
  • the diameters of inlet orifice 3 and outlet orifice 4 are preferably smaller than the diameter of cylinder 2.
  • Piston orifice 5 is a cavity located in block 1 effectively extending beyond inlet orifice 3 so as to connect inlet orifice 3 with cylinder 2.
  • the diameter of piston orifice 5 is preferably smaller than the diameter of inlet orifice 3. Cylinder 2 and outlet orifice 4 are not connected.
  • Inlet channel 6 is a cavity connecting inlet orifice 3 and outlet orifice 4 by circumventing cylinder 2 as shown in the Figures.
  • inlet channel 6 is a U- shaped channel.
  • Outlet channel 7 is another cavity connecting piston orifice 5 and outlet orifice 4 by circumventing cylinder 2, essentially mirroring inlet channel 6 as shown in the Figures.
  • outlet channel 7 is a U-shaped channel. The diameters of inlet channel 6 and outlet channel 7 are preferably the same.
  • Cylinder 2 inlet orifice 3, outlet orifice 4, piston orifice 5, inlet channel 6 and outlet channel 7 are connected with each other and in the absence of any additional mechanical parts a liquid could move from one space to the other.
  • Piston 8 comprises four elements which are permanently attached to one another: piston head 8a, piston shaft 8b, piston spacer 8c and piston seal 8d. These are all blocks of material, preferably made out of metal.
  • the diameter of piston head 8a is marginally smaller than the diameter of cylinder 2 so as to allow piston head 8a to move within cylinder 2 and at the same time to form a seal.
  • the diameter of piston shaft 8b and piston seal 8d are marginally smaller than the diameter of piston orifice 5 so as to allow these parts to move within piston orifice 5 and at the same time to form a seal when required.
  • the diameter of piston spacer 8c is smaller than the diameter of piston shaft 8b and piston seal 8d.
  • Spring 9 is a helical element, preferably made out of metal.
  • the diameter of spring 9 is slightly smaller than the diameter of cylinder 2 so as to allow spring 9 to fit securely into cylinder 2.
  • Trigger valve 10 is a "normally open” 3/2 valve which is situated in inlet channel 6 as shown in Figure 1.
  • the part of inlet channel 6 that connects inlet orifice 3 with trigger valve 10 is referred to as front inlet channel 6a; the part of inlet channel 6 that connects trigger valve 10 with outlet orifice 4 is referred to as rear inlet channel 6b.
  • the predetermined volume is consequently the sum of the volume of liquid that is dispensed in the discharge flow and the fixed volume of liquid.
  • the volume of liquid that is dispensed in the discharge flow is determined by the time it takes for the fixed volume of liquid to be discharged from cylinder 2. The time can be conveniently adjusted by adjusting throttle valve 12. For example, if throttle valve 12 is fully opened then the fixed volume of liquid will be dispensed quickly and thus only a small volume of liquid will be dispensed in the discharge flow. In this situation almost all liquid discharged by the present device will be the fixed volume of liquid itself. If by contrast throttle valve 12 is tightly closed then the fixed volume of liquid will be dispensed slowly and thus a large volume of liquid will be dispensed in the discharge flow.
  • the mechanism of the present invention does not only cover the mechanism drawn with the ratios of the elements as shown in the Figures but extends to mechanisms where the ratios of the elements are selected differently as adapted to other liquids. Furthermore, the mechanism of the present invention does not only cover the mechanism as shown in the Figures but extends to mechanisms in which the concept of using a timer to control the volume dispensed from a pressurised source is employed.
  • the present invention covers mechanisms which employ one or more of the following elements: the use of a piston and cylinder assembly to act as a timer; the use of a liquid as a damping mechanism (preferably the use of the liquid to be dispensed as a damping mechanism); the use of a liquid to reset the timer (preferably the use of the liquid to be dispensed to reset the timer).
  • the size of the various components and the diameters of the various channels and orifices are suitably chosen to reflect the kind of liquid to be dispensed (e.g. the viscosity of the liquid forming an important consideration), the pressure with which the liquid is supplied, the amounts of liquid required for metering and other factors such as how this device might be incorporated into a dispensing system.
  • the mechanism is suitable for any liquid with has a low viscosity and is essentially free of particles.
  • the mechanism can be used to deliver fuel additives to batches of fuel, to deliver vaccination liquids for animals and to deliver beverages or fluid nutrients into containers prior to packaging.
  • Block 1 may also include additional features such as a permanent fixture attached to inlet orifice 3 and/or to outlet orifice 4.
  • a fixture or fixtures essentially extend inlet orifice 3 and/or outlet orifice 4 and allow the dispensing device for liquids to be connected to other equipment.
  • An example for a permanent fixture is a screw fixture. This allows the other equipment to be connected and disconnected as required.
  • the spot application of agricultural chemicals for instance, the application of an agricultural liquid to the base of each plant, is useful as this can limit the amount of agricultural liquid wasted.
  • any agricultural chemical which falls onto the foliage where the uptake is limited may be wasted.
  • Spot application of agricultural chemicals is thus an environmentally friendly way of applying chemicals.
  • An example of an agricultural chemical that is particularly suitable for spot application is the insecticide thiamethoxam (ActaraTM). Thiamethoxam (ActaraTM) has been shown to have very beneficial effects when applied to the base of, for example, coffee plants.
  • the dispensing device for liquids can be used in conjunction with a knapsack sprayer.
  • Knapsack sprayers are commonly used in agriculture. They comprise a tank in which the operator fills with the agricultural liquid, typically in volumes of up to about 30 litres which can be easily carried by the operator, and a means of pressurizing the liquid. Inexpensive versions of knapsack sprayers typically rely on the pressure to be generated by the operator. The operator can generate a continuous pressure typically from about 1 to 3 bars.
  • the dispensing device for liquids can be used in conjunction with a tank. Tanks are commonly used in agriculture to carry agricultural liquids in volumes of up to about 5000 litres. The tanks can have multiple access points for individual operators to attach their equipment. For example six operators might use a single tank as a source of pressurized liquid to feed into their individual spray heads or lances. Mechanical pumps are typically used in conjunction with such tanks to exert pressures of typically from about 3 to 5 bars on the agricultural liquid.
  • the dispensing device for liquids further comprises a filter which is situated near or at inlet orifice 3.
  • the filter can be connected to block 1 permanently or can be detachable from block 1.
  • Filters are commonly used in connection with agriculture liquids to avoid blockage of spray heads and lances. In this instance, the liquid spraying device itself is also vulnerable to blockage by any particles introduced through the agricultural liquid. It is advantageous if the filter is readily detachable so as to allow the operator to exchange or clean the filter if a blockage occurs. In the case that the filter is detachable such a connection can be accomplished as mentioned previously via a permanent screw fixture attached to block 1. The filter would require a complimentary fixture, such as a nut fixture, in order for it to be connected to block 1.
  • the dispensing device for liquids further comprises a lance which is situated near or at outlet orifice 4.
  • the lance can be connected to block 1 permanently or can be detachable from block 1. In the case that the lance is detachable such a connection can be accomplished as mentioned previously via a permanent screw fixture attached to block 1.
  • the lance would require a complimentary fixture, such as a nut fixture, in order for it to be connected to block 1.
  • Lances are commonly used in agriculture to allow the operator to apply the agricultural liquid at a safe distance to himself. Lances are typically from about 80 to 120 cm in length. It is advantageous if the lance itself has a control valve at the tip of the lance (that is the end opposite to the side which is connected to block 1) to avoid run-off of the liquid. This additional feature ensures further improved operator safety and also increases the precision of the metering process.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Catching Or Destruction (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Abstract

L'invention concerne un dispositif de distribution permettant de distribuer un volume prédéterminé de liquide qui est fourni au dispositif sous pression, le volume de liquide distribué par le dispositif étant déterminé par une temporisation qui comporte un piston se déplaçant dans un cylindre dont la vitesse de mouvement d'une position ouverte, dans laquelle l'écoulement jusqu'à la vanne de sortie est ouvert, à une position fermée, dans laquelle l'écoulement jusqu'à la vanne de sortie est fermé, est commandée par un mécanisme amortisseur, caractérisé en ce que le mécanisme amortisseur est un liquide qui est pompé par le piston au travers d'un orifice. Le volume devant être distribué par le dispositif peut être ajusté de manière pratique en changeant la taille dudit orifice. Dans un mode de réalisation préféré, l'invention convient bien à la distribution d'un volume prédéterminé de liquide, de préférence une solution de produits agrochimiques, pour une application localisée desdits produits chimiques.
EP07818592A 2006-10-02 2007-10-01 Dispositif de distribution pour liquides Withdrawn EP2074392A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07818592A EP2074392A1 (fr) 2006-10-02 2007-10-01 Dispositif de distribution pour liquides

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06020692A EP1909077A1 (fr) 2006-10-02 2006-10-02 Appareil de dosage pour liquides
PCT/EP2007/008512 WO2008040515A1 (fr) 2006-10-02 2007-10-01 Dispositif de distribution pour liquides
EP07818592A EP2074392A1 (fr) 2006-10-02 2007-10-01 Dispositif de distribution pour liquides

Publications (1)

Publication Number Publication Date
EP2074392A1 true EP2074392A1 (fr) 2009-07-01

Family

ID=37908335

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06020692A Ceased EP1909077A1 (fr) 2006-10-02 2006-10-02 Appareil de dosage pour liquides
EP07818592A Withdrawn EP2074392A1 (fr) 2006-10-02 2007-10-01 Dispositif de distribution pour liquides

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06020692A Ceased EP1909077A1 (fr) 2006-10-02 2006-10-02 Appareil de dosage pour liquides

Country Status (9)

Country Link
US (1) US20100108721A1 (fr)
EP (2) EP1909077A1 (fr)
JP (1) JP2010506148A (fr)
CN (1) CN101542242A (fr)
AU (1) AU2007304500A1 (fr)
BR (1) BRPI0717115A2 (fr)
CA (1) CA2664072A1 (fr)
WO (1) WO2008040515A1 (fr)
ZA (1) ZA200902282B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009038492A1 (de) * 2009-08-21 2011-02-24 Bürkert Werke GmbH Dosiereinheit
BR112013029961B1 (pt) * 2011-05-24 2020-05-12 Halliburton Energy Services, Inc. Método para aumentar o número de filtros óticos em um espectrômetro de furo descendente, e, ferramenta espectrômetro de furo descendente
US8720746B2 (en) 2012-04-04 2014-05-13 William Sydney Blake One turn actuated duration spray pump mechanism
DE102016212893A1 (de) * 2016-07-14 2018-01-18 F. Holzer Gmbh Pumpkopf sowie Dosiervorrichtung
DE102016212892C5 (de) 2016-07-14 2020-01-30 F. Holzer Gmbh Pumpkopf sowie Dosiervorrichtung
CN106234339B (zh) * 2016-08-01 2018-12-07 王承业 一种农业草地喷药装置
US10472139B2 (en) 2017-08-09 2019-11-12 Chapin Manufacturing, Inc. Dosing cap and system and method of using same
EP3679330A1 (fr) * 2017-09-06 2020-07-15 The Procter and Gamble Company Appareil et procédé de distribution d'une quantité mesurée de produit liquide
CN110899275A (zh) * 2018-09-17 2020-03-24 先正达农作物保护股份公司 洗瓶器
WO2020196285A1 (fr) * 2019-03-27 2020-10-01 住友化学株式会社 Procédé de lutte contre les mauvaises herbes
WO2020196283A1 (fr) * 2019-03-27 2020-10-01 住友化学株式会社 Procédé de lutte contre les mauvaises herbes
CA3105784A1 (fr) * 2020-03-06 2021-09-06 Global Industrial Distribution Inc. Fontaine de remplissage de bouteilles

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Also Published As

Publication number Publication date
ZA200902282B (en) 2010-04-28
CA2664072A1 (fr) 2008-04-10
AU2007304500A1 (en) 2008-04-10
CN101542242A (zh) 2009-09-23
WO2008040515A1 (fr) 2008-04-10
US20100108721A1 (en) 2010-05-06
EP1909077A1 (fr) 2008-04-09
JP2010506148A (ja) 2010-02-25
BRPI0717115A2 (pt) 2013-10-15

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