US3848809A - Atomizers - Google Patents

Atomizers Download PDF

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Publication number
US3848809A
US3848809A US00351355A US35135573A US3848809A US 3848809 A US3848809 A US 3848809A US 00351355 A US00351355 A US 00351355A US 35135573 A US35135573 A US 35135573A US 3848809 A US3848809 A US 3848809A
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US
United States
Prior art keywords
gas
liquid
passage
body member
closure
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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
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US00351355A
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English (en)
Inventor
A Hennequin
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.)
Est Aciers Fins
SOC DES ACIERS FINS de l EST FR
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Est Aciers Fins
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Publication of US3848809A publication Critical patent/US3848809A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/16—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour in which an emulsion of water and fuel is sprayed
    • 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
    • B05B7/1254—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated
    • B05B7/1263—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated
    • B05B7/1272—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means being fluid actuated pneumatically actuated actuated by gas involved in spraying, i.e. exiting the nozzle, e.g. as a spraying or jet shaping gas
    • B05B7/1281—Serial arrangement, i.e. a single gas stream acting on the controlling means first and flowing downstream thereof to the nozzle

Definitions

  • ABSTRACT An atomizer for liquid fuel burners and the spraying of protective liquids or lubricating liquids onto the surfaces of forging, foundry, or stamping/embossing equipment and like articles
  • a cylindrical body member providing respective generally axially directed liquid and gas conduits, the liquid conduit terminating at one end of the body in a restricted liquid discharge passage formed concentrically in a centered axially extending boss and the gas conduit opening at the one end of the body in the radially directed body end wall outwardly of the centered boss;
  • a closure casing slidingly supported on the peripheral wall of the body member and including an end wall structure providing a radial wall opposing the radially directed body end wall to define a gas chamber and having a conical recess coaxially related to the centered boss and defining at its minor diameter end a through bore dimension
  • Provision for shifting the closure casing in the opposite direction comprises convergent angularly spaced restricted passages in the centered boss radially outwardly of the restricted liquid passage to provide permanently open by-pass gas flow passages connecting the gas chamber to the atmosphere to alternately effect a gradual build up of pressure to overcome the biasing force when pressurized gas is supplied and a gradual reduction of pressure in the gas chamber when the pressurized gas supply is interrupted.
  • the preliminary flow of gas and the terminal flow of gas through the by-pass passages as the pressure in the gas chamber rises and falls clears the liquid from the discharge end of the restricted liquid discharge passage and the needle valve to eliminate the need of a liquid return line and to minimize clogging formations on the needle valve and in the end of the restricted liquid discharge passage.
  • the present invention relates to atomizers intended to produce an emulsion of a liquid in a gas, notably to serve either as liquid fuel burners, the gas being generally air or possibly oxygen, or for the projection of protection liquids or lubricating liquids such as poteyages onto the surfaces of forging, founding or stamping/embossing equipment.
  • a liquid-gas emulsion atomizer comprising two feeds under pressure, for gas and liquid to be emulsified respectively, formed in a central body member having a reduced diameter discharge tip at one end defining a centered liquid discharge passage and convergent gas discharge passages the inlet ends of which open through the peripheral tip sidewall and control means in the form of an external closure casing, having a centered needle valve opposingly related to the liquid discharge passage and enlarged, axially directed, sector shaped discharge passages opposite the gas discharge passages.
  • the closure casing is slidingly mounted on the central member and biased axially by resilient means in the direction to effect the closure of the liquid discharge passage by means of the needle valve.
  • the closure casing is also counterbored to closely slidingly receive the discharge tip and define with the end wall of the body member an annular gas chamber, operative when pressurized gas is supplied thereto, to overcome the resilient means and effect sliding movement of the closure casing in the opposite direction and, as a result, the opening of the liquid discharge passage.
  • FIG. 1 is an axial section along line II of FIG. 3;
  • FIG. 2 is an end view according to arrow II of FIG. 1;
  • FIG. 3 is an end view according to arrow III of FIG. 1.
  • the atomizer of the present invention comprises a central body member 1 defined externally by a cylindrical surface 2 separated by a shoulder 3 from another cylindrical surface 4 which has a slightly greater diameter. It is extended at the center of end face 5 by a cylindrical boss or discharge tip 6.
  • the stepped bore of closure casing 7 includes a radial wall 8 conically recessed at 9 to form a forwardly converging wall portion defining a concentric bore in the fonn of a narrow cylindrical surface 10 fitted in a quasi-tight manner onto the periphery of boss 6.
  • Chamber 11 which is defined between faces 5 and 8, is supplied with gas by a pipe or conduit 12 bored in member 1 and communicating with a threaded hole 13 in which there is fitted a gas supply conduit system which is not shown.
  • a passage 14 is provided in the center of boss 6 for the liquid which communicates via another conduit 15 bored in member 1 with another threaded hole 16 into which is fitted a liquid supply pipe system which is also not shown.
  • the assembly formed by casing 7 and nut 21, which are integrally joined with each other, may slide axially while being guided on the cylindrical surfaces 2 and 4 and, being biased towards the left-hand side of FIG. 1, seats needle 17 to completely block the central aperture 14 for the liquid whereas bore 10 blocks the communication between gas chamber 11 and the atmosphere.
  • casing 7 is fixed against rotation relative to member 1 by means of, for example, a lug or key 25 which is integral with casing 7 and slides in a groove 26 which extends along a generatrix of the cylindrical part 4.
  • a liquid inlet pipe for example for combustible liquid or a poteyage mixture, which is constantly under pressure, is fixed in threaded hole 16, while a gas inlet pipe, the gas generally being compressed air, is fixed in threaded hole 13.
  • the air arriving via its pipe serves at the same time to control atomizing and to supply the atomizing fluid.
  • This air pipe is connected for example to a valve or two-positions, three-aperture pneumatic distributor in such a way that in the inoperative position it is passed to the exhaust. In the operating position, the air pipe delivers the pressurized air which is necessary for atomization and for keeping the atomizer or atomizers in the opened position.
  • the method of operation is very simple.
  • the pressure supplied by the spring 20 is sufficient to tightly seat needle 17 to close central aperture 14.
  • pressure is gradually established in chamber 1 1 by virtue of the fact that the rate of flow through the three holes 24 is slower than that of the feed.
  • the pressure in this chamber reaches a value sufficient to overcome the force of spring 20, the assembly of casing 7 and nut 21 begins to be displaced to the right and progressively opens the liquid inlet, while the air is already discharging through aperture 24, thus creating a pre-atomization.
  • valve needle 17 opens aperture 14 completely while the bore escapes from the extremity of the boss 6 and allows the direct distribution of compressed atomization air, this latter being canalized and orientated by the chamfer 9.
  • the maximum rate of flow of the liquid is controlled by the calibration of the diameter of the central passage 14, while the corresponding rate of flow of the air is limited by the course/thread of the nut 21 when spring has contiguous turns, control being achieved by screwing or unscrewing the nut on the casing.
  • the pressure drops gradually in chamber 11 progressively decreasing the air and liquid distribution until the moment that liquid passage 14 is completely closed when a certain quantity of air continues to pass through the three apertures 24 to ensure post-atomization.
  • the control of the quantity of atomized product is achieved either by means of a timing mechanism controlling the atomization time or by limiting, by means of a stop (not shown), the course/thread of the mobile external assembly.
  • valve needle situated entirely outside the liquid under pressure means that the device according to the invention requires no joint made of degradable material. This allows the valve needle to function perfectly even in zones where the temperature is increased, for example as a burner or a poteyage pipe in forging or casting operations, and also avoids all joint wear. Also, when operating or in the inoperative position, there is no danger of any escape of fuel and, therefore, there is no need for any return line to the supply container and no risk of liquid returning into the small air tube.
  • valve needle is self cleaning constantly and the central liquid output hole empties each time atomization is interrupted.
  • the conception of the invention apparatus makes it possible to have large outlet passages without any bifurcation, and thus avoids obstructions and makes for very good atomization.
  • the device according to the invention avoids losses of liquid at the beginning and end of the atomization process due to the preand postatomization.
  • a liquid-gas emulsion atomizer comprising a body member having respective feed conduits for conducting pressurized gas and pressurized liquid to one end of said body member to be emulsified, said liquid feed conduit terminating at said one end of said body member in an axial passage; an external closure casing slidingly supported on said body member having an end wall structure including a needle valve disposed to enter said axial passage and ensure closure of said axial passage, means cooperating with said one end of said body member to define a gas chamber communicating with said gas feed conduit and a gas passage leading from said gas chamber, and also having a series of annularly spaced outlet passages; resilient means interposed between said body member and said closure casing normally biasing said closure casing axially in a direction to ensure the closure of said axial passage against the pressurized liquid and closure of said gas passage; restricted passage means interconnecting said gas chamber through said annularly spaced outlet passages to the atmosphere, said passage means being operative upon delivery of pressurized gas to said gas feed conduits to establish a progressively
  • a liquid-gas emulsion atomizer as claimed in claim 1 wherein said closure casing is composed of two elements screw connected to each other and slidingly supported by said body member, said body member and one of said two elements are respectively provided with radially directed opposing annular shoulders, and said resilient means comprises a compression spring disposed in end bearing engagement with said opposing shoulders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
US00351355A 1972-05-08 1973-04-16 Atomizers Expired - Lifetime US3848809A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7216413A FR2184151A5 (de) 1972-05-08 1972-05-08

Publications (1)

Publication Number Publication Date
US3848809A true US3848809A (en) 1974-11-19

Family

ID=9098173

Family Applications (1)

Application Number Title Priority Date Filing Date
US00351355A Expired - Lifetime US3848809A (en) 1972-05-08 1973-04-16 Atomizers

Country Status (7)

Country Link
US (1) US3848809A (de)
JP (1) JPS5256486Y2 (de)
BE (1) BE817802Q (de)
DE (1) DE2322425C3 (de)
FR (1) FR2184151A5 (de)
GB (1) GB1385615A (de)
IT (1) IT983560B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060075986A1 (en) * 2004-10-07 2006-04-13 Airbus Deutschland Gmbh Timing element for a lubricant dosing unit, lubricant dosing unit, and method for dosing a lubricant
CN110537744A (zh) * 2019-10-17 2019-12-06 东莞市合中川电子科技有限公司 一种气动开关保护罩、主机及电子烟

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5244492U (de) * 1975-09-26 1977-03-29
FR2547215B1 (fr) * 1983-06-08 1987-11-27 Rousselot Claude Pulverisateur transversal de liquide au moyen d'air comprime
JP2691786B2 (ja) * 1988-03-17 1997-12-17 ベステンベルガー，ワルター 定量噴射銃
DE102004048950B4 (de) * 2004-10-07 2006-11-09 Airbus Deutschland Gmbh Zeitglied für eine Minimalmengen-Schmiermitteldosiereinheit, Minimalmengen-Schmiermitteldosiereinheit und Verfahren zum Dosieren eines Schmiermittels

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1939607A (en) * 1929-08-08 1933-12-12 Krautzberger Albert Means for coating by spraying
US2237842A (en) * 1938-12-16 1941-04-08 Harry M Reynolds Spraying device
US2384679A (en) * 1944-11-20 1945-09-11 Parks Cramer Co Atomizer for liquid under pressure
US3353257A (en) * 1964-09-24 1967-11-21 Ronson Corp Gas burning apparatus
US3520480A (en) * 1968-04-24 1970-07-14 Ex Cell O Corp Fuel spray nozzle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1939607A (en) * 1929-08-08 1933-12-12 Krautzberger Albert Means for coating by spraying
US2237842A (en) * 1938-12-16 1941-04-08 Harry M Reynolds Spraying device
US2384679A (en) * 1944-11-20 1945-09-11 Parks Cramer Co Atomizer for liquid under pressure
US3353257A (en) * 1964-09-24 1967-11-21 Ronson Corp Gas burning apparatus
US3520480A (en) * 1968-04-24 1970-07-14 Ex Cell O Corp Fuel spray nozzle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060075986A1 (en) * 2004-10-07 2006-04-13 Airbus Deutschland Gmbh Timing element for a lubricant dosing unit, lubricant dosing unit, and method for dosing a lubricant
US7621702B2 (en) 2004-10-07 2009-11-24 Airbus Deutschland Gmbh Timing element for a lubricant dosing unit, lubricant dosing unit, and method for dosing a lubricant
CN110537744A (zh) * 2019-10-17 2019-12-06 东莞市合中川电子科技有限公司 一种气动开关保护罩、主机及电子烟
CN110537744B (zh) * 2019-10-17 2024-03-29 深圳市优维尔科技有限公司 一种气动开关保护罩、主机及电子烟

Also Published As

Publication number Publication date
DE2322425B2 (de) 1978-06-01
JPS504319U (de) 1975-01-17
DE2322425A1 (de) 1973-11-15
GB1385615A (en) 1975-02-26
DE2322425C3 (de) 1979-02-01
JPS5256486Y2 (de) 1977-12-21
BE817802Q (fr) 1974-11-18
FR2184151A5 (de) 1973-12-21
IT983560B (it) 1974-11-11

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