EP0073232B1 - Procede et dispositif de pulverisation d'un liquide ou d'une suspension - Google Patents

Procede et dispositif de pulverisation d'un liquide ou d'une suspension Download PDF

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Publication number
EP0073232B1
EP0073232B1 EP82900942A EP82900942A EP0073232B1 EP 0073232 B1 EP0073232 B1 EP 0073232B1 EP 82900942 A EP82900942 A EP 82900942A EP 82900942 A EP82900942 A EP 82900942A EP 0073232 B1 EP0073232 B1 EP 0073232B1
Authority
EP
European Patent Office
Prior art keywords
disk
liquid
spray cone
spraying
disk section
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
Application number
EP82900942A
Other languages
German (de)
English (en)
Other versions
EP0073232A1 (fr
Inventor
Georg Walter Busch
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.)
Mantis ULV Spruehgeraete GmbH
Original Assignee
Mantis ULV Spruehgeraete 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 Mantis ULV Spruehgeraete GmbH filed Critical Mantis ULV Spruehgeraete GmbH
Priority to AT82900942T priority Critical patent/ATE17194T1/de
Publication of EP0073232A1 publication Critical patent/EP0073232A1/fr
Application granted granted Critical
Publication of EP0073232B1 publication Critical patent/EP0073232B1/fr
Expired 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
    • 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
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member characterised by the rotating member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/10—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour carrying the materials or objects to be dried with it
    • F26B3/12—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour carrying the materials or objects to be dried with it in the form of a spray, i.e. sprayed or dispersed emulsions or suspensions

Definitions

  • the invention relates to a method for spraying a liquid or suspension by throwing off a spray cone of small droplets from a rotating centrifugal disc, and to a corresponding spray device with a drive shaft which can be set in rapid rotation by a drive device, at least one spray head arranged in a rotationally fixed manner with an essentially conical one Casing surface arranged throwing edge and a rotor connected to the spray head for common rotation.
  • the diameter of the spray cone produced is influenced by the diameter of the centrifugal disc and its speed.
  • a very uniform droplet size of, for example, 35 it can be achieved the hollow cone produced during spraying has a relatively large diameter of, for example, 100 to 120 cm, which is undesirable for many applications.
  • an electrostatic paint spray gun of the type mentioned in which the spray head has a non-rotatably connected hub to a motor shaft, a conical lateral surface connected to it only by three radial arms with a flinging edge and an outside charging edge the hub is fitted with an axial fan with the conveying direction towards the workpiece and the paint mist sprayed from the centrifugal edge is deflected towards the workpiece by an axial air flow passing over the spray head on the outside. Since in this device, which works with compressed air supply and electrostatic voltage, the air moved by the axial fan in the direction of the workpiece is inevitably deflected outward in front of the workpiece, this results in an undesirable widening of the spray cone.
  • a similar spray device in which a compressed air jet is permanently blown axially into the interior of a spray cone thrown from the flinging edge of a conical lateral surface through an air nozzle and a ring of bores in the direction of the workpiece.
  • the blown-in compressed air has to leave the interior of the spray cone somewhere, which in turn leads to a radially outward air flow and a consequent widening of the spray cone.
  • the object of the invention is to provide a method for spraying a liquid or suspension, a corresponding spraying device or a suitable centrifugal disc, which enables the production of a spray cone of smaller diameter in a simple manner without impairing the uniformity and the fineness of the droplet size achieved.
  • the invention further relates to a spray device of the type mentioned at the outset, which is characterized by the features of patent claim 3.
  • the invention also includes a centrifugal disc for a spray device according to the preamble of claim 3, which is equipped with the features of claim 7.
  • the method and the spray device make it possible to reduce the diameter of the spray cone produced in a simple, uncomplicated manner without impairing the fineness and the uniformity of the droplet size.
  • a centrifugal disc with an outer diameter of 5 cm can be used to produce a spray cone with a diameter of only 25 to 35 cm without impairing the fineness and uniformity of the droplet size.
  • the method according to the invention and the spray devices according to the invention are particularly suitable where areas of relatively small dimensions are to be treated without the undesirable spraying of neighboring areas. This is the case, for example, when spraying goods moving on a relatively narrow conveyor belt, the diameter of the spray cone not to exceed the width of the conveyor belt.
  • the spray device shown in Fig. 1 has a battery-powered drive motor 1, on the drive shaft 2, a centrifugal disc 3 is releasably attached.
  • the centrifugal disc 3 has a substantially radially blue color Fenden disc section 4 and an obliquely angled edge skirt 5 on its outer edge, the outer spray edge 6 is formed in a manner known per se fine sawtooth-like (tooth width about 0.5 mm), which is not shown in the drawings for reasons of clarity.
  • a propeller 10 is arranged, which is detachably connected to the centrifugal disc 3 and carries a plurality of propeller blades 11, which are shaped and aligned so that the propeller 10 when it rotates together with the The centrifugal disc 3 generates an air flow directed axially towards it and a vacuum zone 13 is formed on the vacuum side of the propeller 10 facing away from the centrifugal disc 3.
  • a feed channel 7 for the spraying liquid is arranged in a stationary manner around the drive shaft 2.
  • the liquid supplied by this is prevented by the annular apron 18 arranged on the centrifugal disk 3 from radially escaping and passes through through openings 8 arranged near the axis of the disk section 4 to the side of the disk section 4 facing the propeller 10, from where it occurs under the action of the centrifugal force the inner surface of the edge apron 5 is moved up to its sawtooth-like serrated spray edge 6 and is then thrown off by its pointed protrusions in the form of thin liquid jets that immediately disintegrate into droplets of practically the same size.
  • the liquid droplets thrown off move radially outward under the action of the centrifugal force and at the same time fall down under the action of gravity, so that a hollow spray cone 12 is formed.
  • an impeller 15 is provided on the centrifugal disc 3 instead of the propeller 10, which is arranged on the side facing away from the spray cone 12 and rotates with the centrifugal disc 3 and with its impeller blades 19 the air lying therebetween radially outwards Accelerated and thus constantly sucks air through the suction opening 14 communicating with the interior of the spray cone 12, so that a negative pressure zone 13 is formed there, which in turn causes a centripetal flow 17 directed towards this and thus a narrowing of the diameter of the spray cone 12 generated.
  • passage channels 16 are provided which are arranged at uniform intervals over the circumference.
  • gas passage openings 9 can be provided in the disc section 4 of the centrifugal disc 3 distributed over its circumference. These are expediently designed by inclined design of their walls so that the liquid to be sprayed is prevented from escaping through the gas passage openings 9. In certain cases, however, it may also be desirable to allow a portion of the liquid supplied to pass onto the outer surface of the centrifugal disc 3 by appropriately designing the gas passage openings. This applies in particular if it is provided there with a second edge apron 5 (not shown).
  • the spray device explained above with reference to preferred embodiments can be modified by the person skilled in the art in various ways depending on the requirements of the individual case, provided that the use of a rotor for generating a vacuum zone 13 lying inside the spray cone 12 and a centripetal flow 17 is maintained.
  • the diameter of the centrifugal disc 3, the design and the dimensions of the skirt 5, the propeller 10 or the impeller 15 and the arrangement and size of the passage openings 8 and any gas passage openings 9 should be based on the type and flow properties of the liquid or suspension to be sprayed Desired droplet size and the desired diameter of the spray cone 12 can be adjusted appropriately.
  • the centrifugal disc is fastened in the usual way, for example by a clamping screw or by means of a thread on the drive shaft.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)

Claims (8)

1. Procédé pour pulvériser un liquide ou une suspension, dans lequel on chasse ces matières par la force centrifuge d'un disque rotatif (3), sous la forme d'un cône centrifuge d'un disque rotatif (3), sous la forme d'un cône de pulvérisation (12) de fines gouttelettes, procédé caractérisé en ce que, pendant la pulvérisation, on produit, dans l'espace intérieur du cône de pulvérisation (12), un courant de gaz dirigé axialement par rapport au disque (3) dévié vers l'extérieur de celui-ci et un courant de gaz centripète, restreignant le cône de pulvérisation (12).
2. Procédé suivant la revendication 1, caractérisé en ce que, au cours de la pulvérisation, on évacue vers l'extérieur, constamment, du gaz de l'espace intérieur du cône de pulvérisation (12), à travers le disque centrifuge (3).
3. Installation de pulvérisation destinée à pulvériser un liquide ou une suspension, comportant un arbre moteur (2) pouvant être mis en rotation rapide par un moteur d'entraînement (1), une tête de pulvérisation (3), montée solidaire en rotation sur l'arbre, possédant une arête de pulvérisation centrifuge (6) disposée sur une surface enveloppante essentiellement conique, ainsi qu'un rotor relié pour une rotation commune avec la tête de pulvérisation (3), caractérisé en ce que :
a) la tête de pulvérisation est réalisée sous la forme d'un disque centrifuge (3) présentant une section (4) essentiellement plane, et un tablier marginal (5) annulaire, replié sur son bord extérieur, obliquement vers l'extérieur du côté du cône de pulvérisation (12) qui doit être formé,
b) le rotor est réalisé sous la forme d'une hélice (10) entourée par le tablier annulaire (5), ou d'une roue de ventilateur (15) disposée sur la face du disque centrifuge (3) qui est à l'opposé du tablier, avec au moins un orifice de sortie (14) traversant, au voisinage de l'axe la section (4) du disque, et,
c) les ailettes (11 ou 19) de l'hélice (10), ou de la roue (15) du ventilateur, sont réalisées de façon telle qu'au cours de leur rotation, elles produisent, dans l'intérieur du cône de pulvérisation (12), un courant de gaz dirigé axialement vers la section (4) du disque, dévié vers l'extérieur de celui-ci, et un courant de gaz centripète, restreignant le cône de pulvérisation (12).
4. Installation de pulvérisation suivant la revendication 3, comportant un canal d'alimentation fixe pour le liquide à pulvériser, caractérisée en ce que la section (4) du disque centrifuge (3) présente, sur la face située à l'opposé du tablier annulaire (5), une paroi annulaire (18) entourant, sans contact, le canal d'alimentation (7), et dans sa zone entourée par cette paroi, des orifices de passage (8) pour le liquide à pulvériser.
5. Installation de pulvérisation suivant l'une des revendications 3 ou 4, caractérisée en ce que le disque centrifuge (3) est pourvu d'orifices (9) de passage de gaz, dans une zone extérieure de sa section (4), pour le passage du gaz fourni par l'hélice (10).
6. Installation de pulvérisation suivant l'une des revendications 3 ou 4, caractérisée en ce que le disque centrifuge (3) est relié, d'une seule pièce, avec la roue de ventilateur (15) centrifuge, par l'intermédiaire des ailettés (19) de cette roue s'étendant sensiblement radialement, et il est prévu des canaux de passage (16), traversant la section (4) du disque et la roue de ventilateur (15) pour faire passer le liquide à pulvériser d'un canal d'alimentation (7) à la face, tournée vers l'intérieur du cône de pulvérisation (12), de la section (4) du disque.
7. Disque centrifuge pour une installation de pulvérisation suivant le préambule de la revendication 3, caractérisé en ce qu'il comporte une section (4) essentiellement plane, avec un tablier annulaire (5) replié obliquement vers l'extérieur sur son bord extérieur, ainsi qu'une hélice (10) entourée par le tablier annulaire (5) montée, solidaire en rotation, coaxialement à la section (4) du disque, avec des ailettes (11), pour produire un courant gazeux, dirigé axialement par rapport à la section (4) du disque, dévié vers l'extérieur sur celle-ci.
EP82900942A 1981-03-05 1982-02-27 Procede et dispositif de pulverisation d'un liquide ou d'une suspension Expired EP0073232B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82900942T ATE17194T1 (de) 1981-03-05 1982-02-27 Verfahren und vorrichtung zum verspruehen einer fluessigkeit oder suspension.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3108292 1981-03-05
DE3108292A DE3108292C2 (de) 1981-03-05 1981-03-05 Verfahren und Vorrichtung zum Versprühen einer Flüssigkeit oder Suspension

Publications (2)

Publication Number Publication Date
EP0073232A1 EP0073232A1 (fr) 1983-03-09
EP0073232B1 true EP0073232B1 (fr) 1986-01-02

Family

ID=6126385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82900942A Expired EP0073232B1 (fr) 1981-03-05 1982-02-27 Procede et dispositif de pulverisation d'un liquide ou d'une suspension

Country Status (4)

Country Link
US (1) US4562958A (fr)
EP (1) EP0073232B1 (fr)
DE (2) DE3108292C2 (fr)
WO (1) WO1982003026A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538795B1 (fr) * 1982-12-30 1987-01-02 Raffinage Cie Francaise Perfectionnements aux dispositifs de remplissage d'une enceinte avec un solide sous forme particulaire
US5400608A (en) * 1993-02-05 1995-03-28 Ryan Instruments, L.P. Humidity control system
DE4326714A1 (de) * 1993-08-03 1995-02-09 Mantis Ulv Spruehgeraete Segmentrotationsdüse
DE10329813B4 (de) 2003-07-01 2006-01-26 Glatt Systemtechnik Gmbh Vorrichtung zur Ausbildung von Umhüllungen auf Oberflächen fester Körper in einer Beschichtungskammer
USD596905S1 (en) 2008-01-16 2009-07-28 Sherrard James M Cup with mist dispensing opening
DE102009045797A1 (de) * 2009-10-19 2011-04-21 Robert Bosch Gmbh Elektrische Maschine, Hydraulikeinheit
IL247361A0 (en) * 2016-08-18 2016-12-29 Safepack Products Ltd Spray head with uniform coverage
BR112022015337A2 (pt) * 2020-02-05 2022-09-27 Bayer Ag Unidade de pulverização
CN117732627B (zh) * 2024-02-21 2024-05-14 特丝丽化工有限公司 一种洗衣粉的喷射装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL298385A (fr) *
FR551954A (fr) * 1922-05-23 1923-04-18 & Commerciale Du Midi Soc Ind Procédé et appareil pour la désinfection et la destruction d'animaux nuisibles aumoyen d'anhydride sulfureux
GB288904A (en) * 1926-08-31 1928-04-19 Hundertfeuer Ges Fuer Moderne Improvements in liquid spraying devices
US1973051A (en) * 1931-07-09 1934-09-11 Arthur K Doolittle Atomizing disk
DE692808C (de) * 1937-12-15 1940-06-27 Kohlenscheidungs Ges M B H Einrichtung zum Trocknen von Gut durch Zerstaeubung
GB665655A (en) * 1949-04-06 1952-01-30 Pest Control Ltd Device for distributing liquid
GB751609A (en) * 1954-01-15 1956-07-04 Alfons Mauser Improvements in spraying and atomising nozzles, particularly for plantprotecting media
NL283731A (fr) * 1961-09-27
BE642144A (fr) * 1963-01-28 1964-05-04
DE1933147A1 (de) * 1969-06-30 1971-01-21 Mueller Ernst Kg Farbspritzpistole fuer das elektrostatische Farbspritzen
DE2237021A1 (de) * 1972-07-12 1974-01-31 Grolitsch Erhard Dipl Agr Vorrichtung zum zerstaeuben von fluessigkeiten

Also Published As

Publication number Publication date
WO1982003026A1 (fr) 1982-09-16
DE3268212D1 (en) 1986-02-13
DE3108292A1 (de) 1982-09-30
US4562958A (en) 1986-01-07
DE3108292C2 (de) 1986-05-07
EP0073232A1 (fr) 1983-03-09

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