EP0194619A2 - Dispositif de pulvérisation électrostatique à disque rotatif - Google Patents

Dispositif de pulvérisation électrostatique à disque rotatif Download PDF

Info

Publication number
EP0194619A2
EP0194619A2 EP86103108A EP86103108A EP0194619A2 EP 0194619 A2 EP0194619 A2 EP 0194619A2 EP 86103108 A EP86103108 A EP 86103108A EP 86103108 A EP86103108 A EP 86103108A EP 0194619 A2 EP0194619 A2 EP 0194619A2
Authority
EP
European Patent Office
Prior art keywords
liquid
rotating disc
der
storage container
nozzle
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Withdrawn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
EP86103108A
Other languages
German (de)
English (en)
Other versions
EP0194619A3 (fr
Inventor
Bodo Dr. Maurer
Hans Groener
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0194619A2 publication Critical patent/EP0194619A2/fr
Publication of EP0194619A3 publication Critical patent/EP0194619A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0418—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces designed for spraying particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces

Definitions

  • the present invention relates to a device for the safe dispensing of electrically charged drops via a rotary atomizer or another suitable spraying system.
  • Plant treatment agents are generally applied by generating a droplet spectrum in the range from 100 to 600 ⁇ m and then depositing these droplets under the influence of the kinetic energy imparted to the droplets in the dividing device and gravity.
  • the droplets are preferably deposited on the surfaces directly facing the spray device.
  • the amount of liquid applied per unit area must be minimized. There are limits to reducing the amount of liquid; on the one hand by the fact that a minimum number of drops per unit area of the plant surface must be applied to maintain the effectiveness of a crop protection agent and on the other hand by reducing the diameter of the drops increases the losses due to drift and evaporation.
  • the spraying and spraying process in agriculture must take place under changing and not always optimal spraying and spraying conditions.
  • the causes are the resistance to earth of the leaves to be coated, which changes with the water content of the plants and the soil, the influence of the electrical field in the vicinity of the spraying and spraying device, which changes with the geometry of the plants, and the change in the conductivity of the sprayed device due to different active ingredients and spraying liquid.
  • the drop charging can be done in different ways. Charging is possible before the drop is generated (contact charging). charging during drop generation (influenza charging) and charging after drop generation (corona charging). Extensive practical examinations have shown that a significant improvement in droplet accumulation is preferably achieved with contact charging.
  • contact charging One of the main reasons for the difficulties in using contact charging when spraying or spraying conductive liquids is that the electrical energy stored in the spraying system and in the container can be so great, with a correspondingly high voltage and electrical capacity, that the contact with live voltage Sharing is dangerous for humans.
  • liquid drops can be electrically charged by means of the contact charging recognized as particularly suitable and can be sprayed or sprayed safely from a container via a spraying or spraying system, without any restrictions in the size of the container, without spatial or financial costs Applications for intermediate containers are required, or that the functionality is tied to certain narrowly limited conductivity ranges of the liquid to be sprayed.
  • the system is particularly simple to set up, is ready for operation in any position, has low energy consumption, does not clog and can be retrofitted to conventional spraying and spraying systems.
  • the device according to the invention can also be used for coating paper and film webs, for painting metallic objects and for painting objects whose dissipation capacity is sufficient for conventional electrostatic coating.
  • FIG. 1 shows the schematic structure of the device.
  • the liquid 2 is conveyed via a pump 3 from the earthed reservoir 1 via a valve 4 to a nozzle 5. Either by intermittent operation of the valve 4 or by a suitable choice of the nozzle 5, the liquid is in the form of individual drops or in the form of short liquid threads from the nozzle 5 over an air gap 6 of 3 to 30 cm, preferably 5 to 20 cm, on a rotating one Washer 7 sprayed or conveyed to another suitable collecting area.
  • the rotating disc 7 is driven by a motor 8 and electrically charged by a high voltage generator 9.
  • the air gap 6 serves to isolate the grounded liquid system, consisting of reservoir 1, pump 3, valve 4 and nozzle 5, from the charged dividing system, consisting of a rotating disk 7, motor 8 and high-voltage generator 9.
  • the geometry of the air gap depends on the level of high voltage applied.
  • An air gap 6 of 5 to 20 cm is suitable for the range between 50 and 100 kV recognized as particularly effective. Functionality of the system is ensured if the supplied liquid 2 does not establish a conductive connection between the nozzle 5 and the rotating disk 7 in a continuous jet.
  • the high-voltage system is enclosed by a housing 11 that can perform both spray protection and protection against contact. Due to the low electrical capacity of the charged system, special protective measures against unintentional contact with live parts are not necessary if the maximum current that can be emitted by the high-voltage generator 9 in short-circuit operation does not exceed a certain limit value.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Catching Or Destruction (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP86103108A 1985-03-15 1986-03-08 Dispositif de pulvérisation électrostatique à disque rotatif Withdrawn EP0194619A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853509387 DE3509387A1 (de) 1985-03-15 1985-03-15 Kontaktaufladung mittels rotationszerstaeuber
DE3509387 1985-03-15

Publications (2)

Publication Number Publication Date
EP0194619A2 true EP0194619A2 (fr) 1986-09-17
EP0194619A3 EP0194619A3 (fr) 1987-08-26

Family

ID=6265350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103108A Withdrawn EP0194619A3 (fr) 1985-03-15 1986-03-08 Dispositif de pulvérisation électrostatique à disque rotatif

Country Status (3)

Country Link
EP (1) EP0194619A3 (fr)
CA (1) CA1280280C (fr)
DE (1) DE3509387A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3718154A1 (de) * 1987-05-29 1988-12-08 Gema Ransburg Ag Sprueheinheit mit einem rotationsspruehorgan

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001890A (en) * 1956-07-27 1961-09-26 Interplanetary Res & Dev Corp Electrostatic deposition
HU175744B (hu) * 1976-11-09 1980-10-28 Hajtomuevek Es Festoberendeze Ustrojstvo dlja ehlektrostaticheskogo kraskoraspylenija s uluchshennym koehfficientom poleznogo dejstvija pri raspylenii krasok, razbavljaemykh vodoj
DE2937890C2 (de) * 1979-09-19 1981-12-17 Ransburg Gmbh, 6056 Heusenstamm Vorrichtung zur Lackzuführung zu einem elektrostatischen Farbgeber
DE3069773D1 (en) * 1979-11-19 1985-01-17 Ici Plc Electrostatic spraying process and apparatus

Also Published As

Publication number Publication date
DE3509387A1 (de) 1986-09-18
CA1280280C (fr) 1991-02-19
EP0194619A3 (fr) 1987-08-26

Similar Documents

Publication Publication Date Title
DE2731712C2 (de) Tragbares Zerstäubungsgerät
DE2707218C3 (de) Elektrostatische Farbspritzvorrichtung
DE2937879C2 (fr)
DE2630555A1 (de) Vorrichtung und verfahren zum elektrostatischen spruehen
DE1825025U (de) Handspritspistole.
DE8107630U1 (de) Vorrichtung zum zufuehren eines elektrisch leitfaehigen mediums
EP0134951B1 (fr) Procédé et dispositif pour dispenser et répandre sur grandes surfaces des liquides électriquement conducteurs
EP0207357A1 (fr) Procédé pour produire un jet pulvérisé électriquement chargé à partir de liquides conductibles
DE3110757A1 (de) Vorrichtung zum elektrostatischen zerstaeuben von fluessigkeiten
EP0283936A2 (fr) Procédé de commande d'une installation de revêtement électrostatique
EP0125589B1 (fr) Projection ou pulvérisation électrostatique de liquides électro-conducteurs, par example d'agents pour traiter des plantes
DE3707547A1 (de) Verfahren und vorrichtung zum verspritzen von pflanzenschutzmittelloesungen oder -dispersionen
DE4240328C2 (de) Elektrostatische Sprühbeschichtungsvorrichtung für elektrisch leitfähige, nicht brennbare Beschichtungsflüssigkeit
EP0194619A2 (fr) Dispositif de pulvérisation électrostatique à disque rotatif
AT395505B (de) Vorrichtung zum verspruehen von spritzmitteln
DE2121986C3 (de) Elektrostatische Spritzpistole
DE3110148A1 (de) Vorrichtung zum zufuehren eines elektrisch leitfaehigen mediums
EP1222967B1 (fr) Procédé et appareil pour pulvériser un liquide de revêtement
DE1427678A1 (de) Hochspannungsvorrichtung zum elektrostatischen Farbspritzen
DD229046A1 (de) Verfahren und vorrichtung zur applikation von pflanzenschutzmitteln
DE2652059C2 (de) Vorrichtung zum elektrostatischen Auftragen elektrisch leitender, insbesondere wasserverdünnter Farbstoffe
DE4433113C2 (de) Einrichtung zum Aufladen und Abgeben elektrisch leitfähigen Sprühgutes
Sherman et al. Electrodyn sprayer pesticide application using electrostatic atomization
DE3332449A1 (de) Elektrostatisches spruehverfahren und rotationszerstaeuber
KR810001882B1 (ko) 액체의 분무방법

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RHK1 Main classification (correction)

Ipc: B05B 5/08

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19870714

17Q First examination report despatched

Effective date: 19890426

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19890715

R18W Application withdrawn (corrected)

Effective date: 19890715

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MAURER, BODO, DR.

Inventor name: GROENER, HANS