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EP2380667B1 - Pistolet de pulvérisation - Google Patents

Pistolet de pulvérisation Download PDF

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Publication number
EP2380667B1
EP2380667B1 EP11003279.4A EP11003279A EP2380667B1 EP 2380667 B1 EP2380667 B1 EP 2380667B1 EP 11003279 A EP11003279 A EP 11003279A EP 2380667 B1 EP2380667 B1 EP 2380667B1
Authority
EP
European Patent Office
Prior art keywords
liquid
compressed air
spray gun
valve
jacket tube
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.)
Not-in-force
Application number
EP11003279.4A
Other languages
German (de)
English (en)
Other versions
EP2380667A1 (fr
Inventor
Andreas Hutt
Friedrich Baur
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.)
Heupel Reinigungstechnik GmbH
Original Assignee
Heupel Reinigungstechnik GmbH
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 Heupel Reinigungstechnik GmbH filed Critical Heupel Reinigungstechnik GmbH
Publication of EP2380667A1 publication Critical patent/EP2380667A1/fr
Application granted granted Critical
Publication of EP2380667B1 publication Critical patent/EP2380667B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05B7/2405—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
    • B05B7/2435—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 the carried liquid and the main stream of atomising fluid being brought together by parallel conduits placed one inside the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B05B3/06—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B05B7/1218—With means for adjusting or modifying the action of the controlling means
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent
    • B05B7/1245—A gas valve being opened before a liquid valve
    • 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
    • B05B7/2467—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device a liquid being fed by a pressure generated in the container, which is not produced by a carrying fluid

Definitions

  • the invention relates to a spray gun for spraying a liquid by means of compressed air according to the preamble of patent claim 1.
  • Spray guns for spraying a liquid by means of compressed air are known in a variety of different embodiments.
  • One embodiment form spray guns, in which the liquid to be sprayed is sucked in, for example, from a liquid container arranged on the spray gun by the compressed air flowing past it (venturi principle) and exits the spray gun as a liquid / compressed air mixture.
  • the utility model originating from the applicant DE 20 2009 011 168 U1 shows a cleaning system for cleaning surfaces, wherein a spray gun connected to the cleaning device comprises means for metering the shipsstromvalumens and means for metering the cleaning liquid.
  • the disadvantage is that the supply of compressed air and the cleaning liquid to the spray gun via two separate dosing. To produce a compressed air / liquid mixture, the two means for metering must be operated or switched separately.
  • a non-closed metering valve in the liquid supply can lead to an uncontrolled leakage of cleaning fluid when the spray gun is out of service and is stored below the liquid level of a reservoir.
  • the invention has the object to improve the supply of compressed air and cleaning fluid for a spray gun.
  • the invention is based on a spray gun for spraying a liquid by means of compressed air, for example a cleaning liquid in a cleaning system. It comprises a housing with a funnel-shaped air outlet opening, means for generating a swirling flow in the air outlet opening, and means for metering the airflow volume and the liquid.
  • the essence of the invention is that the air flow and the liquid can be switched together by means of a two-stage metering valve.
  • the two-stage metering valve allows successive connection of the compressed air and the liquid with a common valve mechanism in one-hand operation.
  • Another advantage of the two-stage metering valve is the execution of cleaning processes with different cleaning media by a single spray gun, such as the cleaning and / or drying of a Surface only with compressed air and cleaning with a compressed air / liquid mixture.
  • an actuating means for the metering valve disposed on the housing is adapted to actuate the two-stage metering valve in a first stage with a compressed air operation and in a second stage with a compressed air / liquid operation.
  • the example designed as a trigger actuator is rotatably connected to the gun body. In the first stage, by pulling the trigger, the compressed air supply is opened by moving a body in the metering valve by releasing a compressed air channel. By further pulling the trigger then moves a dispensing needle over a stop and opens the liquid supply to the second stage.
  • compressed air operation of the spray gun a surface of coarse dirt particles can be cleaned. Dirt particles, which can not be removed from the surface by the compressed air operation, can often be released from the surface by subsequently connecting the liquid in the second stage of the metering valve.
  • the flow rate of the liquid can be limited.
  • the amount of liquid emerging from the metering valve can be limited by adjusting the stroke of the valve needle via a stop. By adjusting the position of the stop, the axial offset of the valve needle can be changed. As a result, when the metering valve is opened, the escape of excessively large quantities of fluid for cleaning moisture-sensitive surfaces, such as, for example, padding surfaces, can be avoided.
  • connection element with a pressure chamber is arranged on the gun body.
  • the compressed air supplied to the pressure chamber is sent to subsequent, air-conveying elements of the spray gun with reduced cross-sectional area forwarded. This increases the flow speed of the compressed air.
  • the liquid flows through a valve seat in a fluid hose.
  • the valve seat is arranged in a connecting element, which is connected within the pressure chamber with the gun body.
  • the connecting element is connected to a flexible fluid hose.
  • the pressure chamber is connected by means of a second adapter to a jacket hose which surrounds the fluid hose.
  • the compressed air can preferably be routed separately to the cleaning liquid up to the outlet end of the flexibly formed jacket tube, wherein the outlet end of the fluid tube is adapted to the outlet end of the jacket tube.
  • the pressure chamber has an annular supply of compressed air of the same pressure in the jacket tube.
  • the jacket tube is guided with the fluid hose running in the interior in means for generating a vortex flow.
  • the flexible fluid hose generates a circular in the operating state of the spray gun Rotational movement within a venturi due to the passing air flow in the jacket tube and the subsequent exit from the jacket tube. This rotational movement in turn generates a vortex flow which forms a negative pressure in its center in the region of a surface to be cleaned, whereby dirt particles are sucked away or led away from a surface to be cleaned.
  • an air / liquid mixture is formed at the end of the jacket tube.
  • the pending at the end of the fluid hose cleaning liquid is sucked by the exiting compressed air at the end of the jacket tube due to a high flow rate and mixes to a compressed air / liquid mixture, which is then available for cleaning purposes.
  • the two-stage metering valve forms a barrier to the liquid in the liquid supply line of the spray gun.
  • the liquid is supplied by the opening of a valve seat, such as a valve needle, wherein the pre-compressed air supply takes place for example by moving a sleeve.
  • Both media are supplied by pressing a common, two-stage metering valve in two consecutive operation steps of the spray gun and turned off in reverse order. As a result, a separate shut-off, such as a stopcock in the liquid supply is not required.
  • the FIG. 1 shows a spray gun 1, which includes a gun body 2, which is shown for clarity in a front gun body 2a and a rear gun body 2b divided.
  • the spray gun 1 is connected to a separate supply line for liquid 4 and 5 for compressed air.
  • a metering valve 6 is integrated with a dispensing needle 6 a, which is actuated by a trigger 3 rotatably mounted on the gun body 2.
  • the compressed air supply is activated by pulling the trigger 3 in the direction of the rear gun body 2b, wherein the position of the dispensing needle 6a remains unchanged (a detailed explanation of the compressed air supply takes place in the following description of FIG. 6 ).
  • the dispensing needle 6a performs a movement in the direction of the rear gun body 2b in a second operating stage, whereby a liquid supply in the metering valve 6 is released to the already activated compressed air supply.
  • an end cap 7 In the axial extension of the dispensing needle 6a is on the rear gun body 2b an end cap 7 by means of a thread arranged, which has a stop 29 in its interior.
  • the end cap 7 covers the rear end portion of the dispensing needle 6a, which projects beyond the outer surface of the rear gun body 2b.
  • One or more compression springs 8 arranged in the end cap 7 are guided over the end area of the metering needle 6a and form the required restoring force for the moving components.
  • a connecting element 10 is connected by means of a union nut 9 with a connecting thread 30 arranged on the front gun body 2 in the direction of flow of the fluids.
  • the union nut 9 engages for attachment to a collar 10 integrally formed collar collar 31st
  • the connecting element 10 has in the interior a pressure chamber 15 for receiving the compressed air. Furthermore, a connecting element 11 is connected by a thread with the front gun body 2 within the pressure chamber 15. The connecting element 11 has a valve seat 12 in the interior and together with the dispensing needle 6a, the essential elements of the metering valve 6 for the supply of liquid.
  • the connecting element 11 is connected to a first adapter 13, which serves for fastening a fluid hose 14.
  • the liquid is introduced via the open valve seat 12 and continued therein.
  • the connecting element 10 is connected in the flow direction of the compressed air with a second adapter 16 to which a jacket tube 17 is attached.
  • the jacket tube 17 is in communication with the pressure chamber 15 and is fed by this with compressed air.
  • the attached to the first adapter 13 fluid hose 14 passes through the second adapter 16 and is encompassed by the subsequent jacket tube 17.
  • the Compressed air in the jacket tube 17 is thereby guided separately from the liquid in the fluid tube 14.
  • the jacket tube 17 forms a circular compressed air supply due to the guided inside the fluid hose 14. At the same time, the speed of the compressed air is increased during the introduction into the jacket tube 17 due to the reduction of the free cross section.
  • a venturi 19 is arranged on the connection element 10 via a threaded connection, in which the fluid tube 14 and the jacket tube 17 enclosing the fluid tube 14 are guided into the region of the outlet opening of the venturi 19.
  • the fluid tube 14 and the jacket tube 17 perform in the operating state of the spray gun 1 from a circular rotational movement within the air hopper 19 due to the present high-pressure air flow. This rotational movement creates a kind of vortex flow, which causes a negative pressure in its center in the region of a surface to be cleaned, whereby dirt particles are released from a surface to be cleaned and sucked or carried away.
  • the jacket tube 17 has on its mantle surface a plurality of spaced-apart sleeves 18 in different lengths, which form the circular motion in the operating state of the spray gun 1 evenly or attenuate due to their weight and their elasticity.
  • FIG. 2 is a perspective view of the connection element 10 is shown, which is encompassed by the nut 9.
  • the adapter 10 is connected by means of the union nut 9 with the arranged on the front gun body 2a connecting thread 30.
  • a threaded pin 20 with an inner and outer thread is formed in the flow direction of the compressed air on the connection element 10.
  • In the internal thread of the threaded pin 20 of the adapter 16 is screwed for the jacket tube 17.
  • On the external thread of the threaded pin 20 of the air vent 19 is screwed.
  • the connection element 10 engages in its fastened arrangement on the front gun body 2a, the connecting element 11 with the internally formed valve seat 12 and the first adapter 13 for securing the fluid hose 14.
  • the venturi 19 is sealed by a seal 32 against the connecting element 10 to unwanted suction of foreign air in to avoid the venturi 19 during operation of the spray gun 1.
  • FIG. 3 the connecting element 11 is shown in a perspective view, wherein the connecting element 11 is connected in the flow direction via a connecting thread 33 with the first adapter 13.
  • the first adapter 13 is used for fastening the fluid hose 14 to the connecting element 11.
  • a connecting thread 21 for fastening the connecting element 11 to the front gun body 2 a is arranged on the end face of the connecting element 11 opposite the adapter 13.
  • the connecting element 11 has inside the valve seat 12 for the needle metering valve.
  • FIG. 4 the first adapter 13 for fastening the fluid hose 14 is shown, wherein the rear end of the first adapter 13 is screwed into the connecting thread 33 of the connecting element 11.
  • the fluid hose 14 later passes through the jacket hose 17 attached to the second adapter 16 to its end, preferably up to the outlet opening of the air funnel 19.
  • the second adapter 16 is shown for fastening the jacket tube 17, wherein the provided external thread is screwed into the internal thread of the threaded pin 20 on the connection element 10.
  • the jacket tube 17 has on its mantle surface a plurality of spaced apart sleeves 18 of different lengths, which during flow through the Damping compressed air and the cleaning liquid resulting circular motion and form uniformly.
  • the circular motion creates within the venturi 19 a vortex flow, which generates a negative pressure in its center, similar to a tornado flow, in the area of a surface to be cleaned. As a result, dirt particles can be released from the surface to be cleaned and removed.
  • FIG. 6 a detail view of a spray gun 1 is shown, in which a two-stage metering valve 6 is integrated.
  • the metering valve 6 comprises a metering needle 6a, which in the longitudinal direction at its front end in the conically shaped sealing surface of the valve seat 12 (see FIG. 1 ) seals.
  • the valve needle 6a is surrounded by a valve sleeve 22 movable thereon, which is guided in a channel 34 arranged in the pistol grip 2.
  • valve sleeve 22 rests with its pointing in the flow direction of the compressed air end on the back of the trigger 3.
  • the valve sleeve 22 is displaced on the valve needle 6a, which is held in position by a return spring.
  • a permanently connected to the valve sleeve 22 sealing collar 23 is moved together with the arranged thereon O-ring seal 27 behind a arranged in the direction of the gun body 2b supply line for compressed air 5 and gives the compressed air supply in the first operating stage of the metering valve 6 in an inner Compressed air channel free.
  • valve sleeve 22 The restoring force of the valve sleeve 22 via a compression spring 8, which is supported between a screwed-in channel 34 sleeve 29 and the sealing collar 23.
  • a compression spring 8 By further pulling the trigger 3 in the direction of the gun body 2b, the rear end of the sleeve 22 is pressed against a fixedly arranged on the valve needle pressure plate 25 and switches the liquid supply of the second operating stage of the metering valve 6, so the liquid supply to the compressed air free by the valve needle 6a is withdrawn.
  • valve needle 6a Upon discharge of the trigger 3, the valve needle 6a together with the valve sleeve 22 via the restoring force of the compression spring 8 and a further compression spring 35 for Valve needle 6a moved forward, first the liquid supply of the second operating stage of the metering valve 6 and subsequently the compressed air supply of the first operating stage via the valve sleeve 22 is turned off.
  • a cleaning of a surface with different media compressed air and compressed air-liquid mixture is possible, and it is a dripping of the cleaning liquid avoided when the compressed air is switched off.

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  • Nozzles (AREA)

Claims (7)

  1. Pistolet de pulvérisation (1) permettant de pulvériser un liquide par air comprimé, tel qu'un liquide de nettoyage d'une installation de nettoyage, comportant un carter avec une ouverture de sortie d'air de forme conique, des moyens pour générer un flux tourbillonnaire dans l'ouverture de sortie d'air, et des moyens pour le dosage du volume de flux d'air et du liquide, le flux d'air et le liquide pouvant être commandés conjointement au moyen d'une valve de dosage (6) à deux niveaux,
    caractérisé en ce que
    sur le carter (2) du pistolet est disposé un élément de raccordement (10) à une chambre de pression (15), le liquide étant introduit dans un tuyau flexible pour fluide (14),
    la chambre de pression (15) étant reliée par un deuxième adaptateur (16) à un tuyau flexible d'enveloppe (17) qui entoure le tuyau flexible pour fluide (14),
    et le tuyau flexible d'enveloppe (17), conjointement avec le tuyau flexible pour fluide (14) disposé à l'intérieur, est disposé dans une ouverture de sortie d'air de forme conique.
  2. Pistolet de pulvérisation (1) selon la revendication 1, caractérisé en ce qu'un moyen d'actionnement disposé sur le carter (2) est adapté à actionner la valve de dosage (6) à deux niveaux, à savoir un premier niveau les opérations à air comprimé et un deuxième niveau pour les opérations à air comprimé et liquide.
  3. Pistolet de pulvérisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que le débit du liquide peut être réglé.
  4. Pistolet de pulvérisation (1) selon la revendication 3, caractérisé en ce que le liquide entre dans le tuyau flexible pour fluide (14) via un siège de vanne (12).
  5. Pistolet de pulvérisation (1) selon la revendication 1, caractérisé en ce que la chambre de pression (15) forme une admission circulaire de l'air comprimé de même pression dans le tuyau flexible d'enveloppe (17).
  6. Pistolet de pulvérisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un mélange d'air et de liquide est formé à l'extrémité du tuyau flexible d'enveloppe (17).
  7. Pistolet de pulvérisation (1) selon l'une quelconque des revendications précédentes, caractérisé en ce que la valve de dosage (6) à deux niveaux forme un barrage du liquide dans la conduite d'admission du liquide (4) vers le pistolet de pulvérisation (1).
EP11003279.4A 2010-04-20 2011-04-19 Pistolet de pulvérisation Not-in-force EP2380667B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010017823A DE102010017823A1 (de) 2010-04-20 2010-04-20 Sprühpistole

Publications (2)

Publication Number Publication Date
EP2380667A1 EP2380667A1 (fr) 2011-10-26
EP2380667B1 true EP2380667B1 (fr) 2015-09-02

Family

ID=44280960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11003279.4A Not-in-force EP2380667B1 (fr) 2010-04-20 2011-04-19 Pistolet de pulvérisation

Country Status (2)

Country Link
EP (1) EP2380667B1 (fr)
DE (1) DE102010017823A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012103095U1 (de) 2012-08-16 2012-08-31 Lindauer Dornier Gesellschaft Mit Beschränkter Haftung Vorrichtung zur Oberflächenreinigung
DE202015009521U1 (de) 2015-05-13 2018-02-15 Robert Nesen Hochdruckreinigungsmaschine
CN108128283B (zh) * 2017-12-28 2024-04-02 珠海格力智能装备有限公司 喷枪及具有其的洗车机
DE102020002468A1 (de) 2020-04-15 2021-10-21 Engelbert Homann Leicht transportierbare universell einsetzbare Reinigungsvorrichtung und zuverlässig arbeitendes leicht handhabbares Reinigungsgerät zur Reinigung von Oberflächen jedweder Art sowie die Verwendung desselben

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB414478A (en) * 1933-05-04 1934-08-09 George Alfred Stevenson Improvements relating to spraying devices
CH288820A (de) * 1949-09-01 1953-02-15 Kopperschmidt Wilhelm Spritzverfahren für ein Medium, das zur Verspritzung zu erwärmen ist, und Vorrichtung zur Ausführung des Verfahrens.
FR1408758A (fr) * 1964-06-23 1965-08-20 Sames Mach Electrostat Perfectionnements aux procédés de recouvrement d'objets, et moyens pour leur mise en oeuvre
US3685743A (en) * 1970-05-07 1972-08-22 Martin Sebastiani Spray guns
US5595346A (en) * 1992-04-20 1997-01-21 Spraying Systems Co. Air assisted atomizing spray nozzle
US20080251610A1 (en) * 2007-04-13 2008-10-16 Unifix Usa Llc. Spray handle with detachable front wand adaptor
DE202009011168U1 (de) 2009-08-18 2010-02-11 Heupel Reinigungstechnik Gmbh Reinigungsanlage zur Reinigung von Oberflächen

Also Published As

Publication number Publication date
DE102010017823A1 (de) 2011-10-20
EP2380667A1 (fr) 2011-10-26

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