EP0102907A2 - Chalumeau du type à allumage par étincelles - Google Patents

Chalumeau du type à allumage par étincelles Download PDF

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Publication number
EP0102907A2
EP0102907A2 EP83401759A EP83401759A EP0102907A2 EP 0102907 A2 EP0102907 A2 EP 0102907A2 EP 83401759 A EP83401759 A EP 83401759A EP 83401759 A EP83401759 A EP 83401759A EP 0102907 A2 EP0102907 A2 EP 0102907A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
torch
front part
piezoelectric element
electrodes
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Withdrawn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
EP83401759A
Other languages
German (de)
English (en)
French (fr)
Inventor
Yosinori Kubota
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
Publication of EP0102907A2 publication Critical patent/EP0102907A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00—Igniters using electrically-produced sparks
    • F23Q3/002—Igniters using electrically-produced sparks using piezoelectric elements
    • 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
    • F23D14/38—Torches, e.g. for brazing or heating

Definitions

  • the invention relates to a spark ignition torch nozzle.
  • the nozzle according to the present invention can be mounted essentially on an oxy-cutting torch, although it can however also be used on a heating burner (including a burner of the type used for gas welding).
  • This nozzle is adaptable to a hand torch or an automatic torch and is not limited to the level of combustible gas necessary for this.
  • the spark ignition torch nozzle generally comprises a high voltage power supply applied to the spark electrodes arranged on the front part, and consequently, an electrical source to be mounted inside the nozzle or in the torch on which the nozzle in question is adapted.
  • the invention relates to the previous type of ignition nozzles where the electrical source is mounted inside the nozzle.
  • the ignition nozzle is provided with a body generally composed of an inner tube and an outer tube; the electrical source is mounted in the inner tube.
  • This source includes a piezoelectric element in many cases.
  • the piezoelectric block is mounted in the inner tube with a percussion member.
  • the cutting oxygen flows through the inner tube and a pressure at the beginning of the passage of the gas flow quickly displaces the percussion member so that it strikes the piezoelectric element in order to thus generate high voltage electricity.
  • This high voltage supply is applied to the ignition electrodes located at the front of the torch nozzle to produce sparks.
  • the combustible gas is already flowing from the front of the nozzle and there is thus an ignition automatic gas.
  • the inner and outer tubes which constitute the torch nozzle are usually made of copper or copper alloy and, in many cases, thanks to their conductivity, they also serve as electroconductive devices to electrically connect the two electrodes of the piezoelectric element to the ignition electrodes.
  • the invention seeks to provide a solution to the problem indicated.
  • Its object is therefore to produce a spark-ignition torch nozzle comprising a front part and a rear part, which are detachably connected together, the front part being provided with spark electrodes near the front while the part rear is provided with a built-in electric source, the gas passage channels of the front part and those of the rear part being in inter-communication while the electrodes of the electric source are electrically connected to the electric electrodes by electroconductive members.
  • the front part of the nozzle can be separated from the rear part when it has been damaged by heat beyond a certain limit.
  • only the front part of the nozzle can be discarded while the rear part which contains the valuable electric source can still be used after mounting a new part on the front. It is not necessary at this time that the new front part is of the same type as the old one and it can be of another type, a different number for example.
  • the type of torch nozzle without incorporated electrical source which is not part of the scope of this invention and whose power source is mounted in the torch, requires a funnel-shaped insulator (called more far "conical ceramic piece") interposed between a conical outer periphery located at the rear of the nozzle and the inner periphery of a recess defined in a torch head, intended to receive the rear part of the nozzle.
  • This piece of conical ceramic also acts as a gas leak seal, requires very high precision in shapes and dimensions and is very expensive. This ceramic is useless on the type of nozzle containing an electric source, object of the present invention. This type of nozzle is therefore more economical in this respect than the type where the electrical source is mounted inside the torch.
  • the invention also has a notable advantage arising from a construction in which a piezoelectric element is used as a percussion source or a corresponding percussion member, which moves longitudinally relative to the nozzle. Thanks to this construction, the nozzle is no longer bulky on its rear part and the assembly produced is compact.
  • the front part 3 of the torch nozzle comprising spark electrodes 1 and 2 near the front end comprises an inner tube 4 and a tube exterior 5, both made of electroconductive material (such as copper or a copper alloy) with mutual coaxial mounting.
  • Tubular insulators 6 and 7, for example made of ceramic, are interposed between the inner tube 4 and the outer tube 5, respectively near the front and rear ends.
  • the insulator 7 of the rear part is adjusted with the inner tube 4 and fits around the outer tube 5.
  • Reference 9 designates a gas-tight seal and reference 10 a plurality of passage grooves defined peripherally on the front end of the inner tube 4.
  • Reference 11 designates a plurality of passage bores defined peripherally in the insulator 7 of the rear end and the mark 12 indicates a channel for the passage of cutting oxygen passing through the inner tube 4.
  • the mark 13 designates a tubular passage channel defined between the inner tube 4 and the outer tube 5. This passage 13, of same as the bore 11 and the grooves 10, forms a fuel gas mixture supply duct 14.
  • the rear part 15 of the nozzle is made of a material (such as copper or a copper alloy) and comprises respectively a cutting oxygen passage channel 16 defined axially inside, a plurality of passage channels mixture of fuel gas 17 defined peripherally and of the preheating oxygen 18 and fuel gas passage channels 19 in communication with the gas passage channels 17.
  • the plurality of fuel gas passage channels 17 is in communication with a passage annular 17 'defined in the proximal part of the rear part 15.
  • the shutter 28 of the movable housing 21- of the piezoelectric element comprises a flush metal part 30 provided with a plurality of passage bores 29 and an insulator 31 which supports the metal part 30, fixed in position by a retaining ring 32.
  • a helical compression spring 33 is mounted between the shutter 28 and the housing 21 of the piezoelectric element in order to move the housing 21 towards the valve seat 27.
  • the metal part 30 supports an electroconductive helical spring 34.
  • An electrically conductive coupling ring 35 is provided for connecting the front part 3 to the rear part 15 of the nozzle. This ring 35 is adapted so as to extend from the front part 3 to the rear part 15. Of the ignition nozzle by tightening the outer surfaces of the two parts 3 and 15.
  • a thread 41 defined on the rear half of the outer periphery of the coupling ring 35 engages on a thread 42 defined in the front inner periphery of a torch head 40
  • the ring 35 is then tightened in order to compress a notch 38 defined in the internal wall of the ring 35 against the collar 8 of the front part 3 of the nozzle and, at the same time, the rear face of the front part 3 of the nozzle against the front face of the rear part 5 of the nozzle.
  • sparks 39 consisting of the front part 3 and the rear part 15 on the torch head 40.
  • the rear face of the front part 3 and the front face of the rear part 15 are thus compressed against each other when the nozzle is fitted to the torch head 40, the plurality of passage bores 11 in the front part 3 is placed in communication with the annular passage 17 ′ in the rear part 15.
  • the oxygen passage channel 12 of the front part 3 is put in gas-tight communication with the oxygen passage duct 16 of the rear part 15 and the helical spring 34 of the rear part 15 is compressed elastically against the rear end of the inner tube 4 of the front part 3 so as to establish an electrical connection.
  • One of the electrodes of the piezoelectric element 23 is connected to the electrode 1 by the flush metal part 24, the metal part 30, the helical spring 34 and the inner tube 4.
  • the other electrode of the piezoelectric element 23 is connected to the electrode 2 by the housing 21, the rear part of the nozzle, the coupling ring 35 and the outer tube 5.
  • Reference 43 designates a cutting oxygen passage conduit, reference 44 a preheating oxygen passage conduit and reference 45 a fuel gas passage conduit.
  • the inner tube 4 comprises a member 46 in the form of a disc at the rear, flush with the rear part 15 of the nozzle.
  • An insulator 47 is mounted between the disc 46 and the collar 8 of the outer tube 5.
  • the rear part 15 of the nozzle is provided with an insulator 51 fixed at its proximal end.
  • This insulator 51 has a plurality of passage bores 52 at its periphery, in communication with the annular passage 17.
  • the coupling ring 35 in this form of real sation, has a smooth inner wall surface 53 in position with the disc 46 and in contact with the latter.
  • the third embodiment of Figure 5 comprises a fixed piezoelectric element housing 54 and a movable percussion member 56 supporting a permanent magnet 55.
  • the marks 57 and 58 denote the flush metal parts.
  • the electrical contacts between the two electrodes of the piezoelectric element and the inner and outer tubes are ensured at all times since the housing 54 of the piezoelectric element is fixed.
  • the other characteristic points of the construction are the same as those of the first embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP83401759A 1982-09-07 1983-09-07 Chalumeau du type à allumage par étincelles Withdrawn EP0102907A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1982136227U JPS5942459U (ja) 1982-09-07 1982-09-07 スパ−ク着火式火口
JP136227/82U 1982-09-07

Publications (1)

Publication Number Publication Date
EP0102907A2 true EP0102907A2 (fr) 1984-03-14

Family

ID=15170256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401759A Withdrawn EP0102907A2 (fr) 1982-09-07 1983-09-07 Chalumeau du type à allumage par étincelles

Country Status (5)

Country Link
EP (1) EP0102907A2 (en, 2012)
JP (1) JPS5942459U (en, 2012)
AU (1) AU1878283A (en, 2012)
FR (1) FR2532718A1 (en, 2012)
ZA (1) ZA836655B (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599166A1 (de) * 1992-11-27 1994-06-01 Franz Künzli Ag Injektor-Mundstück für Brennaggregate
WO2003025462A1 (de) * 2001-09-07 2003-03-27 Messer Cutting & Welding Gmbh Schneidbrenner mit multifunktionalem brennerkopf
CN106879154A (zh) * 2017-03-25 2017-06-20 郭敏青 一种等离子体热解装置
WO2019174451A1 (zh) * 2018-03-16 2019-09-19 徐慕庆 一种割嘴

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571124B1 (fr) * 1984-10-03 1989-03-31 Air Liquide Buse de chalumeau a melange interne
FR2588358B1 (fr) * 1985-10-08 1989-10-20 Air Liquide Module d'allumage piezo-electrique et bruleur utilisant un tel module

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6049812B2 (ja) * 1980-04-10 1985-11-05 清二 加川 火口
JPS6049813B2 (ja) * 1980-08-21 1985-11-05 清二 加川 火口

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599166A1 (de) * 1992-11-27 1994-06-01 Franz Künzli Ag Injektor-Mundstück für Brennaggregate
US5535953A (en) * 1992-11-27 1996-07-16 Huehne; Erwin Injector tip for burning aggregates
WO2003025462A1 (de) * 2001-09-07 2003-03-27 Messer Cutting & Welding Gmbh Schneidbrenner mit multifunktionalem brennerkopf
CN106879154A (zh) * 2017-03-25 2017-06-20 郭敏青 一种等离子体热解装置
WO2019174451A1 (zh) * 2018-03-16 2019-09-19 徐慕庆 一种割嘴

Also Published As

Publication number Publication date
JPS6319731Y2 (en, 2012) 1988-06-01
JPS5942459U (ja) 1984-03-19
AU1878283A (en) 1984-03-15
FR2532718B3 (en, 2012) 1985-02-22
ZA836655B (en) 1984-04-25
FR2532718A1 (fr) 1984-03-09

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

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17P Request for examination filed

Effective date: 19830910

AK Designated contracting states

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

18W Application withdrawn

Withdrawal date: 19850130

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

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R18W Application withdrawn (corrected)

Effective date: 19850404

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KUBOTA, YOSINORI