US3716189A - Method of an apparatus for atomizing liquid droplets in the sprayjet of a spraying device - Google Patents

Method of an apparatus for atomizing liquid droplets in the sprayjet of a spraying device Download PDF

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Publication number
US3716189A
US3716189A US00080399A US3716189DA US3716189A US 3716189 A US3716189 A US 3716189A US 00080399 A US00080399 A US 00080399A US 3716189D A US3716189D A US 3716189DA US 3716189 A US3716189 A US 3716189A
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US
United States
Prior art keywords
mist
jet
droplets
atomized
region
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 - Lifetime
Application number
US00080399A
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English (en)
Inventor
O Locher
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.)
HEIMO GERAETEBAU GmbH
HEIMO GERATEBAV GmbH
Original Assignee
HEIMO GERAETEBAU 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.)
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Publication date
Application filed by HEIMO GERAETEBAU GmbH filed Critical HEIMO GERAETEBAU GmbH
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material

Definitions

  • Explosions or detonations of a certain frequency will in a pipe produce gas colum oscillations upon which pressure waves are superimposed the amplitudes of which are determined to a major extent by the geometric configuration of the pipe. In the pipe there are thus created overpressure and underpressure zones which follow each other chronologically. The pressure maxima and pressure minima differ considerably from the atmospheric pressure.
  • liquid is introduced through a bore. The liquid jet is immediately torn up into finest droplets by the oscillating gas column and due to the high temperature is partially evaporated and is together with the waste gases expelled in the form of a mist.
  • the method according to the invention for atomizing non-atomized liquid droplets in the marginal regions of a mist jet is characterized primarilyin that the liquid droplets are once more conveyed to the mist forming zone.
  • the liquid droplets in the mist forming zone are conveyed to an area which has an underpressure.
  • the device according to the present invention for carrying out the new method provides that the pipe is equipped with an adapter in the form of a tube of a greater cross-section than the pipe while the outer confining wall of said tubular adapter is in the form of a double wall defining an annular chamber between the two walls. This annular chamber serves for returning the liquid droplets to the mist preparing zone.
  • the tubular adapter is fixedly connected to the pipe by a sealing wall or, is desired, is detachably connected thereto. In this connection it is important that this wall forms a proper seal between the tubular adapter and the pipe.
  • the annular chamber communicates with the inner space of the adapter through bores. These bores serve to feed the liquid droplets, which return through the annular chamber of the adapter, to the mist preparing zone for a further atomization. It is particularly advantageous to provide these bores at areas which are located in the vicinity of or approximately in the plane passing through that end of the pipe which extends into the adapter.
  • the pipe 1 forms the rear portion of the air or gas generating pipe and preferably hasthe same diameter as the remainder of the pipe. If the flow velocity seems to be too slow, pipe 1 may be designed as nozzle without a widening portion.
  • the liquid to be atomized is introduced through bore 2 into pipe 1 while the feeding of the liquid to be introduced may be effectedin a pressureless manner or under an overpressure depending on the operation of the air or gas generator.
  • the spray liquid is torn up into finest droplets by the high flow velocity in pipe 1 when it enters the pipe 1 through bore 2. In view of the high temperature in pipe 1, the droplets are partially evaporated and together with the gas column and the waste gases are ejected through the adapter 3 having a greater diameter than pipe 1.
  • the desired outer counter flow effect for carrying out the method according to the invention is realized so that the liquid droplets which float in the marginal zone of the mist jet and together with the latter leave the adapter 3 will, in view of the prevailing pressure drop in the annular chamber 6, be returned to the bores 5 and through said bores will be returned to the main flow in the plane 4 whereby the liquid droplets will pass once more into the mist preparing zone.
  • a method of atomizing a liquid spray which includes the steps of: introducing the liquid spray to be atomized into the flow of a gaseous jet thereby creating a region of mist preparation in which the liquid spray is torn into fine droplets and the majority of said droplets is atomized, ejecting the thus formed mist-gaseous mixture in the form of a jet, and returning non-atomized droplets collected from the outer marginal region of said jet of mist-gaseous mixture directly to only said region of mist preparation itself.
  • a method according to claim 1 which includes the steps of collecting excess non-atomized droplets, under-pressurizing a zone in the region of mist preparation, and returning the excess droplets directly to the zone of said under-pressurizing in the mist-gaseous mixture.
  • under-pressurizing occurs by sudden widening of crosssection of the gaseous jet, and supplying of nonatomized droplets occurs specifically from outside the gaseous stream in transition to said widening of crosssection.
US00080399A 1969-10-14 1970-10-13 Method of an apparatus for atomizing liquid droplets in the sprayjet of a spraying device Expired - Lifetime US3716189A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691951812 DE1951812A1 (de) 1969-10-14 1969-10-14 Verfahren und Vorrichtung zur feineren Zerstaeubung von in einem Nebelstrahl befindlichen Fluessigkeitstropfen und Pflanzenschutznebelgeraetes

Publications (1)

Publication Number Publication Date
US3716189A true US3716189A (en) 1973-02-13

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ID=5748179

Family Applications (1)

Application Number Title Priority Date Filing Date
US00080399A Expired - Lifetime US3716189A (en) 1969-10-14 1970-10-13 Method of an apparatus for atomizing liquid droplets in the sprayjet of a spraying device

Country Status (2)

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US (1) US3716189A (de)
DE (1) DE1951812A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4730775A (en) * 1986-01-10 1988-03-15 Afa Division Of Waynesboro Textiles, Inc. Two piece foamer nozzle assembly
DE69003182T2 (de) * 1989-06-30 1994-04-28 Taiyo Yuden Kk Zerstäuber zur Bildung einer dünnen Schicht.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035677A (en) * 1931-03-19 1936-03-31 Francis J L Dorl Spraying device
US2826399A (en) * 1955-07-07 1958-03-11 Pumpindustri Ab Foam sprinkler
US3251556A (en) * 1963-12-26 1966-05-17 Bete Fog Nozzle Inc Humidifier nozzle
US3425058A (en) * 1967-06-23 1969-01-28 Robert S Babington Fuel burner
US3533553A (en) * 1968-07-30 1970-10-13 Meridian Enterprises Inc Aerating fountain device
US3583634A (en) * 1968-12-02 1971-06-08 Fmc Corp Spray nozzle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2035677A (en) * 1931-03-19 1936-03-31 Francis J L Dorl Spraying device
US2826399A (en) * 1955-07-07 1958-03-11 Pumpindustri Ab Foam sprinkler
US3251556A (en) * 1963-12-26 1966-05-17 Bete Fog Nozzle Inc Humidifier nozzle
US3425058A (en) * 1967-06-23 1969-01-28 Robert S Babington Fuel burner
US3533553A (en) * 1968-07-30 1970-10-13 Meridian Enterprises Inc Aerating fountain device
US3583634A (en) * 1968-12-02 1971-06-08 Fmc Corp Spray nozzle

Also Published As

Publication number Publication date
DE1951812A1 (de) 1971-04-22

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