EP0177423A1 - Innenmischende Schneidbrennerdüse - Google Patents

Innenmischende Schneidbrennerdüse Download PDF

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Publication number
EP0177423A1
EP0177423A1 EP85401917A EP85401917A EP0177423A1 EP 0177423 A1 EP0177423 A1 EP 0177423A1 EP 85401917 A EP85401917 A EP 85401917A EP 85401917 A EP85401917 A EP 85401917A EP 0177423 A1 EP0177423 A1 EP 0177423A1
Authority
EP
European Patent Office
Prior art keywords
section
core
torch nozzle
zone
cone
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.)
Granted
Application number
EP85401917A
Other languages
English (en)
French (fr)
Other versions
EP0177423B1 (de
Inventor
Denis Bolot
Francis Cuny
Didier Lasnier
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to AT85401917T priority Critical patent/ATE37225T1/de
Publication of EP0177423A1 publication Critical patent/EP0177423A1/de
Application granted granted Critical
Publication of EP0177423B1 publication Critical patent/EP0177423B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/52—Nozzles for torches; for blow-pipes

Definitions

  • the present invention relates to a torch nozzle with internal mixture, of the type comprising an outer annular casing and a core disposed in this casing, the casing and the core defining a series of channels each of which successively comprises, starting from the upstream, an injection zone adapted to be supplied with combustible gas and oxidizing gas, a mixing zone of small cross-section then a homogenization zone of clearly larger cross-section, the outer casing extending beyond the end of the core and forming at its downstream end a single outlet pipe for the mixture.
  • the main advantage of the second family torches lies in a very high safety of use: in case of reentry of flame, this generally only concerns one channel, and like the distance between the flame front and the injector is small, the volume of detonating mixture concerned is considerably lower than with a pre-mixing torch. In any case, even in the event of a general reentry of flame (which is improbable), the operator's hand, away from the nozzle by several tens of cm, risks absolutely nothing.
  • the object of the invention is to provide a monodard nozzle which, for a moderate total length, ensures the ejection under excellent conditions of a well homogeneous mixture, for flow rates up to several m 3 / h .
  • the invention relates to a torch nozzle of the aforementioned type, characterized in that the channels open into an annular space delimited between the outer casing and the core and having a section approximately constant and equal to the total section of the channels, this annular space in turn opening into a single passage with decreasing section delimited by the outer envelope and the downstream end of which forms said single outlet pipe for the mixture.
  • the casing 1 has in its upstream part a thread 5 for connection to a torch head (not shown), then a hexagon 6 for tightening, then it has a convergent shape up to its downstream end.
  • the core 2 From a point located outside the envelope to the abscissa x 4 , the core 2 comprises a series of longitudinal grooves 12 regularly distributed over its periphery. It also comprises, from its upstream end face, a blind axial bore 13 and, from this, a series of conduits 14 each of which opens into a groove 12 at a certain distance x 1 from the plane of upstream end of envelope 1.
  • the grooves 12 then gradually disappear in the area 9, which constitutes a transition zone where the channels open into an annular space 16 delimited between the core and the envelope from x 3 to x 5 .
  • the parabolic profile of the core 2 is chosen so that the section of the annular space 16 remains substantially constant and equal to the value S defined above.
  • the wall part 3 of the envelope 1 alone delimits a single passage 17 with decreasing circular section; from x 6 to x 7 , the wall part 4 delimits a single duct 18 with a constant circular section which is connected to the passage 17.
  • the mixture crosses the passage 17, where it undergoes an acceleration until reaching, at the entry of the conduit 18, a speed sufficient to balance, at the exit of the nozzle, the speed of deflagration of the mixture.
  • the nose 10 of the core is modified so as to facilitate its realization: instead of having a rigorously parabolic profile, this nose consists of a trunk of upstream cone 19 followed by a downstream cone 20 more strongly convergent, which ends with the same rounded point 11 as above.
  • connection circle of the truncated cone 19 and the cone 20 is located on the abscissa x 8 , intermediate between x4 and x 5 , for which the gas passage section would be maximum if the nose 10 was a single cone 21 s' extending from x 4 to x 5 , as shown in phantom in Figure 3.
  • the Applicant has successfully tested an oxy-acetylene nozzle with internal mixture in accordance with the variant of FIG. 3, for acetylene flow rates up to 3 m 3 / h. For oxygen / acetylene consumption ratios close to stoichiometry, no sensitivity to "injector intake" was found.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Plasma Technology (AREA)
  • Nozzles (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Shovels (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
EP85401917A 1984-10-03 1985-10-02 Innenmischende Schneidbrennerdüse Expired EP0177423B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401917T ATE37225T1 (de) 1984-10-03 1985-10-02 Innenmischende schneidbrennerduese.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8415154A FR2571124B1 (fr) 1984-10-03 1984-10-03 Buse de chalumeau a melange interne
FR8415154 1985-10-03

Publications (2)

Publication Number Publication Date
EP0177423A1 true EP0177423A1 (de) 1986-04-09
EP0177423B1 EP0177423B1 (de) 1988-09-14

Family

ID=9308296

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401917A Expired EP0177423B1 (de) 1984-10-03 1985-10-02 Innenmischende Schneidbrennerdüse

Country Status (10)

Country Link
US (1) US4653692A (de)
EP (1) EP0177423B1 (de)
JP (1) JPH0617736B2 (de)
AT (1) ATE37225T1 (de)
AU (1) AU568229B2 (de)
CA (1) CA1261732A (de)
DE (1) DE3565003D1 (de)
ES (1) ES296015Y (de)
FR (1) FR2571124B1 (de)
ZA (1) ZA857582B (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3005934B2 (ja) * 1994-10-24 2000-02-07 豊田合成株式会社 ステアリングホイール用ホーンスイッチ
CN1103427C (zh) * 1998-11-12 2003-03-19 李天珠 自吸式焊炬
US6783662B2 (en) 1999-03-18 2004-08-31 Exxonmobil Research And Engineering Company Cavitation enhanced liquid atomization
US6199768B1 (en) * 1999-03-18 2001-03-13 Exxon Research And Engineering Company Process and apparatus for atomizing FCC feed oil
AU6795200A (en) 1999-08-26 2001-03-19 Exxonmobil Research And Engineering Company Superheating atomizing steam with hot fcc feed oil
US6579085B1 (en) 2000-05-05 2003-06-17 The Boc Group, Inc. Burner and combustion method for the production of flame jet sheets in industrial furnaces
TW201116358A (en) * 2009-11-11 2011-05-16 Cheng-Fu Wu Welding device of electric welding machine
CN113994206A (zh) * 2019-01-14 2022-01-28 安捷伦科技有限公司 用于gc检测器的通用无管喷嘴

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR491070A (fr) * 1918-07-29 1919-05-20 Alexander Frederick Jenkins Perfectionnements aux chalumeaux permettant le découpage et le soudage combinés
US1526923A (en) * 1920-03-18 1925-02-17 American Gasaccumulator Co Tip for welding blowpipes
US1940343A (en) * 1928-10-29 1933-12-19 Nat Welders Mfg And Supply Com Interchangeable torch
US2348839A (en) * 1941-01-28 1944-05-16 Union Carbide & Carbon Corp Blowpipe
FR1541971A (fr) * 1967-10-26 1968-10-11 British Oxygen Co Ltd Ajutage pour brûleur à combustible et oxygène
DE2211110A1 (de) * 1972-03-08 1973-09-20 Kjellberg Eberle Gmbh Mehrteilige schneidduese fuer gasgefeuerte brenner an brennschneidmaschinen und verfahren zur herstellung einer solchen schneidduese

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2231199A (en) * 1937-12-20 1941-02-11 Smith Welding Equipment Corp Torch
US2468824A (en) * 1944-11-23 1949-05-03 Air Reduction Multipiece cutting tip
JPS58137240U (ja) * 1982-03-13 1983-09-14 テイサン株式会社 自動着火式ガス切断用火口
JPS5942459U (ja) * 1982-09-07 1984-03-19 テイサン株式会社 スパ−ク着火式火口

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR491070A (fr) * 1918-07-29 1919-05-20 Alexander Frederick Jenkins Perfectionnements aux chalumeaux permettant le découpage et le soudage combinés
US1526923A (en) * 1920-03-18 1925-02-17 American Gasaccumulator Co Tip for welding blowpipes
US1940343A (en) * 1928-10-29 1933-12-19 Nat Welders Mfg And Supply Com Interchangeable torch
US2348839A (en) * 1941-01-28 1944-05-16 Union Carbide & Carbon Corp Blowpipe
FR1541971A (fr) * 1967-10-26 1968-10-11 British Oxygen Co Ltd Ajutage pour brûleur à combustible et oxygène
DE2211110A1 (de) * 1972-03-08 1973-09-20 Kjellberg Eberle Gmbh Mehrteilige schneidduese fuer gasgefeuerte brenner an brennschneidmaschinen und verfahren zur herstellung einer solchen schneidduese

Also Published As

Publication number Publication date
AU4816885A (en) 1986-04-10
FR2571124B1 (fr) 1989-03-31
ATE37225T1 (de) 1988-09-15
FR2571124A1 (fr) 1986-04-04
EP0177423B1 (de) 1988-09-14
CA1261732A (fr) 1989-09-26
ES296015Y (es) 1988-01-16
JPH0617736B2 (ja) 1994-03-09
AU568229B2 (en) 1987-12-17
JPS6191413A (ja) 1986-05-09
ES296015U (es) 1987-07-16
DE3565003D1 (en) 1988-10-20
US4653692A (en) 1987-03-31
ZA857582B (en) 1986-05-28

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