EP1402958A1 - Sprühvorrichtung - Google Patents

Sprühvorrichtung Download PDF

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Publication number
EP1402958A1
EP1402958A1 EP03020573A EP03020573A EP1402958A1 EP 1402958 A1 EP1402958 A1 EP 1402958A1 EP 03020573 A EP03020573 A EP 03020573A EP 03020573 A EP03020573 A EP 03020573A EP 1402958 A1 EP1402958 A1 EP 1402958A1
Authority
EP
European Patent Office
Prior art keywords
tank
product
reservoir
pressure
spraying
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Withdrawn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
EP03020573A
Other languages
English (en)
French (fr)
Inventor
Patrick Loubeyre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1402958A1 publication Critical patent/EP1402958A1/de
Withdrawn legal-status Critical Current

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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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2475—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device comprising a container carried on the back of the user
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/08—Apparatus to be carried on or by a person, e.g. of knapsack type
    • B05B9/0805—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material
    • B05B9/0833—Apparatus to be carried on or by a person, e.g. of knapsack type comprising a pressurised or compressible container for liquid or other fluent material comprising a compressed gas container, e.g. a nitrogen cartridge
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2416—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives

Definitions

  • the present invention relates to a projection device defined by the preamble of claim 1.
  • projection devices are used to apply phytosanitary treatments.
  • This type of device is still used for cleaning surfaces by applying a detergent or by mechanical abrasion.
  • Patent FR 856 572 discloses a sprayer for phytosanitary products comprising two reservoirs intended to contain two treatment products which cannot be mixed before application since they are capable of reacting with each other.
  • a diaphragm pump driven by the user with a lever is provided in each tank. These pumps make it possible to produce an air pressure above the liquids acting on them in order to expel them outside the sprayer via a chamber allowing them to be mixed.
  • This sprayer is fitted with a harness allowing it to be worn on a man's back.
  • the device is autonomous but requires, on the part of the user, the energy necessary for the compression of the propulsion air.
  • the air pressure in the tanks and, consequently, the product flow vary greatly depending on the action of the user on the pump.
  • Document FR 2 781 208 discloses a device for applying a liquid composition for cosmetic use.
  • This device uses a jet of pressurized gas to transport the composition from a reservoir to a target support.
  • This device has several reservoirs of compositions having different colors or properties.
  • the nozzle from which the fluid jet emanates is adjustable so that it can be positioned opposite the chosen reservoir and thus apply the composition therein.
  • Documents FR 1 029 807 and FR 1 394 125 are known for phytosanitary treatment devices comprising two reservoirs. A first is removable and intended to receive a propellant gas and a second to receive the product to be sprayed.
  • the propellant gas bears directly on the free surface of the product to be sprayed. On the one hand, this contact very often causes the alteration of phytosanitary products as much as this propellant gas is under pressure.
  • the flow rate of product to be sprayed can only be adjusted by modifying the pressure of the propellant gas or by changing the product ejection nozzle.
  • the object of the invention is to improve the existing devices and to overcome the aforementioned problems.
  • the invention proposes in particular to provide a simple, light, autonomous device, generating a minimum of noise pollution, allowing the projection of liquid, pulverulent or granular products with a constant flow rate without altering them and the flow rate of which can be adjusted independently of the propellant gas pressure and the diameter of the ejection nozzle.
  • the spraying device is characterized in that it comprises between the pressure gas storage tank and the lance, a venturi sucking the product contained in the tank.
  • the function of the pressurized gas is no longer as in the prior art to press on the free surface of the product, but to suck it from the tank.
  • the device may further comprise between the product reservoir and the venturi, an adjustable valve making it possible to adjust the flow rate of the product independently of the pressure of the propellant gas and of the diameter of the nozzle for ejecting the lance.
  • Figure 1 is a perspective view of the device according to the invention comprising a harness.
  • Figure 2 is a pneumatic diagram of a first embodiment of the device according to the invention.
  • FIG. 3 is a pneumatic diagram of a second embodiment of the device according to the invention.
  • the device 1 shown in Figure 1 mainly comprises two tanks 2 and 3, a pneumatic circuit streamlined by a cover and extended by a lance 4 terminated by an ejection nozzle 5 and a harness allowing it to be worn on a man's back.
  • the harness includes a back structure 20 on which is fixed a belt 21, 22 and two loops 23a and 23b for distributing the weight of the device on the shoulders of the user.
  • the tank 2 is intended to contain the compressed air necessary for the transport of the product to be sprayed.
  • the reservoir 2 is filled with compressed air under a pressure of the order of 400 bars and is preferably made from a composite material wound on the basis of fibers. Glass fiber, carbon fiber or an aramid fiber such as Kevlar (registered trademark) can be used for this purpose. Such a material makes it possible to obtain a reservoir resistant to very high pressure constraints and having a mass low enough for a user to be able to carry on his back a projection device comprising this reservoir.
  • the reservoir 2 is connected to the pneumatic circuit of the device 1 upstream of a regulator 8. Its fixing is carried out for example by means of a thread produced on the reservoir and cooperating with a tapping produced in the body of the regulator 8.
  • the tank has in its attachment zone to the rest of the device 1 a stop valve not shown allowing its opening and closing. This valve must be closed when the tank 2 is uncoupled from the pneumatic circuit and opened after having connected the tank 2 to the pneumatic circuit.
  • the reservoir 3 is intended to store the product to be sprayed. It is made of mechanically welded sheet metal or can also be made of composite material. It has an upper cover 14 allowing it to be filled with product to be sprayed. The base of this reservoir 3 has an opening allowing the outlet of the product to be sprayed. This opening is connected to a pipe comprising an adjustable valve 12 intended to regulate the flow of product.
  • the outlet of the distributor 9 feeds a venturi 7 via a regulator 10 with adjustable pressure, optional in the case where the regulator 8 is adjustable.
  • the pipe from the reservoir 3 is connected to the venturi 7 at its neck where the air has the maximum speed and the lowest static pressure.
  • the product is thus sucked in and entrained by the air flow towards the nozzle 5 by which it is projected towards the surface to be treated or to be stripped.
  • This nozzle may advantageously consist, when the product is intended for pickling by mechanical abrasion, in a convergent tube causing the acceleration of the air and the product before it is projected or when the product is intended for the application of a liquid, into a tube with internal fins allowing the air and the product it contains to rotate.
  • the nozzle 5 comprises mechanical or pneumatic means controlling the movement of the distributor 9 and making it possible to control the operation of the projection device. This control can also be located at the distributor 9 and be actuated by the user's free hand.
  • the user equipped with such a projection device can intervene in places that are difficult to access and lack any energy supply source. Indeed, the energy necessary for the operation of the device is stored in the form of gas pressure in the tank 2.
  • the device 1 has for this purpose quick coupling means between the tank 2 and the rest of the pneumatic circuit such as the screw connection described above.
  • Empty tanks can be used again. Indeed, these can be filled thanks to an air compressor. They are preferably filled with an air pressure of the order of 400 bars.
  • the reservoir 3 likewise preferably has quick coupling means with the rest of the pneumatic circuit.
  • the product to be sprayed is liquid, it can be poured directly into the tank 3 by its upper cover either be contained in a flexible plastic envelope having a rigid or semi-rigid base.
  • the reservoir 3 then comprises means making it possible to pierce the base of the envelope and to connect the latter in leaktight manner to the pneumatic circuit. In the latter case, the reservoir is not in contact with the product and therefore does not require washing after use.
  • the reservoir 3 containing the product to be sprayed is supplied by a pipe fitted with a non-return valve 13 and a pressure reducer 11 to adjustable pressure.
  • the upper cover 14 of the tank is then provided with means for quenching a gas pressure of the order of a few bars.
  • the two tanks are preferably removable. They have fixing means such as threads or bayonets cooperating with complementary means present on the pneumatic circuit to link them thereto.
  • Such a device makes it possible to carry out phytosanitary treatment of crops, defrosting by spraying alcohol-based products, cleaning by spraying a detergent or abrasive product or depositing a surface protection coating.
  • the regulators 8, 10, 11, the distributor 9 and the non-return valve 13 can be grouped in a single element making it possible to reduce the mass of the projection device.
  • Pressure gauges can be placed at different points in the pneumatic circuit so as to allow adjustment of the spraying speed and the product flow rate and to control the operating reserve of the device.
  • the projection device may still not have a harness but be linked to a carriage allowing its transport without fatigue of the user.

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  • Nozzles (AREA)
EP03020573A 2002-09-25 2003-09-18 Sprühvorrichtung Withdrawn EP1402958A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0211857A FR2844728A1 (fr) 2002-09-25 2002-09-25 Dispositif de projection de produit liquide, pulverulent ou sous forme de granules
FR0211857 2002-09-25

Publications (1)

Publication Number Publication Date
EP1402958A1 true EP1402958A1 (de) 2004-03-31

Family

ID=31970983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03020573A Withdrawn EP1402958A1 (de) 2002-09-25 2003-09-18 Sprühvorrichtung

Country Status (2)

Country Link
EP (1) EP1402958A1 (de)
FR (1) FR2844728A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR564233A (fr) * 1923-03-22 1923-12-24 Dispositif spécialement destiné à la pulvérisation et à l'épandage d'encaustique liquide
FR856572A (fr) 1937-12-17 1940-06-18 Perfectionnements aux appareils de pulvérisation pour l'agriculture
FR1029807A (fr) 1949-12-24 1953-06-08 Perfectionnements apportés aux dispositifs pulvérisateurs de liquides, notamment pour répandre des liquides antiparasites et anticryptogamiques
FR1394125A (fr) 1964-02-13 1965-04-02 Dispositif d'arrosage, en particulier pulvérisateur, sous pression et automatique
US4434939A (en) * 1980-08-01 1984-03-06 Stankowitz James L Applicator gun
FR2781208A1 (fr) 1998-07-20 2000-01-21 Oreal Dispositif pour la pulverisation sur un support d'une composition choisie parmi une pluralite de compositions
DE19921348A1 (de) * 1999-05-10 2000-11-16 Ralph Eisenschmid Verfahren und Vorrichtung zur Zerstäubung von Flüssigkeiten und deren Anwendung
US6254015B1 (en) * 1998-02-26 2001-07-03 Robert Henry Abplanalp Sprayer for liquids and nozzle insert

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR564233A (fr) * 1923-03-22 1923-12-24 Dispositif spécialement destiné à la pulvérisation et à l'épandage d'encaustique liquide
FR856572A (fr) 1937-12-17 1940-06-18 Perfectionnements aux appareils de pulvérisation pour l'agriculture
FR1029807A (fr) 1949-12-24 1953-06-08 Perfectionnements apportés aux dispositifs pulvérisateurs de liquides, notamment pour répandre des liquides antiparasites et anticryptogamiques
FR1394125A (fr) 1964-02-13 1965-04-02 Dispositif d'arrosage, en particulier pulvérisateur, sous pression et automatique
US4434939A (en) * 1980-08-01 1984-03-06 Stankowitz James L Applicator gun
US6254015B1 (en) * 1998-02-26 2001-07-03 Robert Henry Abplanalp Sprayer for liquids and nozzle insert
FR2781208A1 (fr) 1998-07-20 2000-01-21 Oreal Dispositif pour la pulverisation sur un support d'une composition choisie parmi une pluralite de compositions
DE19921348A1 (de) * 1999-05-10 2000-11-16 Ralph Eisenschmid Verfahren und Vorrichtung zur Zerstäubung von Flüssigkeiten und deren Anwendung

Also Published As

Publication number Publication date
FR2844728A1 (fr) 2004-03-26

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