EP0072764A2 - Zündrohr für einen Schweissbrenner - Google Patents

Zündrohr für einen Schweissbrenner Download PDF

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Publication number
EP0072764A2
EP0072764A2 EP82401546A EP82401546A EP0072764A2 EP 0072764 A2 EP0072764 A2 EP 0072764A2 EP 82401546 A EP82401546 A EP 82401546A EP 82401546 A EP82401546 A EP 82401546A EP 0072764 A2 EP0072764 A2 EP 0072764A2
Authority
EP
European Patent Office
Prior art keywords
tube
nozzle
oxygen
ignition
torch
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Withdrawn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
EP82401546A
Other languages
English (en)
French (fr)
Other versions
EP0072764A3 (de
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 EP0072764A2 publication Critical patent/EP0072764A2/de
Publication of EP0072764A3 publication Critical patent/EP0072764A3/de
Withdrawn legal-status Critical Current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 present invention relates to an ignition nozzle intended to be mounted on a welding or cutting torch provided with an ignition mechanism.
  • the Japanese patent application published under No. 68712/71 mentions an ignition nozzle comprising a piezoelectric ignition device.
  • the nozzle is designed such that said piezoelectric ignition device, its exciter, an exciter retaining magnet, a cable supplying a spark electrode located at the anterior end of the nozzle as well as others corresponding parts are all provided inside the nozzle.
  • the exciter When opening the valves of the fuel gas mixture and preheating oxygen supply circuits, the exciter is separated from its magnet and is moved by the pressure of the flow of fuel mixture and oxygen so as to strike the piezoelectric ignition device, which produces a spark resulting from the electromotive force thus released and ensuring the automatic ignition of the gaseous fuel mixture at the outlet of the latter by the anterior end of the nozzle. Since the ignition takes place automatically by the simple operation of opening valves required by the implementation of the torch, this system represents an improvement compared to the conventional method of manual ignition by lighter or by matches and which causes an explosion delaying the setting.
  • the present invention proposes to provide a nozzle which can be incorporated into a torch with an integrated ignition device which will be of simple construction and of a low price.
  • the nozzle described here is of a type consisting of an inner tube and an outer tube whose anterior ends form a spark zone. These two tubes are made of a material that conducts electricity well and an electrical insulator separates them over almost their entire length, with the exception of the aforementioned spark zone. The rear ends of the two tubes form the negative and positive terminals for connection to a power supply.
  • the nozzle is made in such a way that the internal and external tubes are used as a unitary assembly comprising three elements, namely an ignition electrode, a power supply connection and a cable for connecting them.
  • the structure of the nozzle is simple, the electrical insulator only serving to insulate the inner tube from the outer tube.
  • the resulting simplification of manufacture makes it possible to reach a cost price corresponding to that of a consumable article, which will contribute to popularizing a torch with an integrated ignition system, reliable and easy to handle.
  • the ignition nozzle (a) consists of an inner tube (1) and an outer tube (2), of which copper is the main material and which are used as electrical conductors.
  • the inner tube (1) and the outer tube (2) are fully insulated, except at the location of the spark zone (S) at the end, by electrical insulation (3).
  • the inner tube (1) constitutes the oxygen-cutting oxygen conduit (4) and the outer tube comprises a conduit (5) for the passage of the combustible gas mixture.
  • the posterior ends of the tubes (1 and 2) have the form of terminals (6) and (7) for connection to the piezoelectric mechanism (C).
  • the outer tube (2) is constricted and a passage for combustible gas (8) is provided near the rear end of the conduit intended for the gas mixture (5) and communicates with it. latest.
  • the number of conduits (5) for gaseous fuel mixture and for preheating oxygen can be determined on request.
  • the nozzle described is a modified version of the so-called shrunk type nozzle and which has an orifice made in an outer tube (2) shrunk over its entire length around its axis, to form a conduit. intended for the passage of the combustible gas mixture, an inner tube (1) isolated on its outer circumference being introduced into this orifice.
  • this type of nozzle has the advantage, like a conventional shrunk nozzle, of not disturbing the flow of each of the gases.
  • the reference (b) designates the torch head into which the nozzle (a) is introduced from the front and fixed by a nut (9).
  • An inner tubular element (10) for housing the piezoelectric mechanism (c) is fixed to the rear face of the torch head by means of a cable gland (11).
  • a tubular element (13) outer is screwed onto the rear face of the torch head and locked by a lock nut (14), a spacer (12) being interposed between the end of the inner tubular element (10) and that of the 'outer tubular element (13).
  • the torch is provided with a connection with connections for combustible gas (15), for preheating oxygen (16) and for oxygen cutting oxygen (17) arranged in parallel and in this order from front to rear. .
  • a piezoelectric element (18) is slidably mounted in the inner tubular element (10). It is provided with a magnet (19) acting on a valve seat (20) constituted by a magnetic substance.
  • the mark (H) designates the cutting oxygen inlet port.
  • the nozzle (a) shown in Figure 2 is an improved version of the insertion type nozzle which was the subject of Japanese patent application No. 187582/80 and in which an inner tube (1 ') and a tube outer (2 ') fronts are connected, at their rear ends, to an inner tube (1 ") and an outer tube (2").
  • An insulator (3d) separates the inner tube (1 ') from the outer tube (2') and, in order, the insulators (3e) and (3f) separate the inner tube (1 ') from the outer tube (2 " ) and the latter from the inner tube (1 ").
  • the inner tube (1 ') and the inner tube (1 ") constitute the inner tube (1)
  • the outer tube (2 1 ) with the outer tube (2") together constitute the outer tube (2).
  • the passage reserved for the combustible gas mixture (5) is narrowed to the right of the anterior end as indicated in FIG. 3, which differentiates it from a conventional nozzle of the type with insertion. This results in an absence of irregularities in the distribution of the gas flow rates and in mixing difficulties as well as a great improvement in the gas flow.
  • the energy source that can be used to produce the percussion may be of mechanical origin, replacing the pressure of oxygen cutting oxygen.
  • the piezoelectric element (c) can be replaced by a source of electric current. Since these nozzles are adaptable to welding torches, the present system is also applicable to welding nozzles.
  • the inner tube (1) can be replaced by a cylinder serving as an electrode since there is no longer a cutting oxygen circuit.

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)
EP82401546A 1981-08-18 1982-08-17 Zündrohr für einen Schweissbrenner Withdrawn EP0072764A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP122116/81U 1981-08-18
JP12211681U JPS5827619U (ja) 1981-08-18 1981-08-18 火口

Publications (2)

Publication Number Publication Date
EP0072764A2 true EP0072764A2 (de) 1983-02-23
EP0072764A3 EP0072764A3 (de) 1984-07-18

Family

ID=14828017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82401546A Withdrawn EP0072764A3 (de) 1981-08-18 1982-08-17 Zündrohr für einen Schweissbrenner

Country Status (2)

Country Link
EP (1) EP0072764A3 (de)
JP (1) JPS5827619U (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630528A1 (fr) * 1988-04-20 1989-10-27 Air Liquide Buse a allumage piezo-electrique et module d'allumage comportant une telle buse
EP0403246A3 (de) * 1989-06-14 1991-03-06 Jon Bogue Beatty Autogenschneidbrenner

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1343579A (fr) * 1962-09-04 1963-11-22 Harris Calorific Co Chalumeau à allumoir
JPS4422360Y1 (de) * 1967-07-13 1969-09-20
JPS5831222A (ja) * 1981-08-18 1983-02-23 Teisan Kk 着火機構付ト−チ

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630528A1 (fr) * 1988-04-20 1989-10-27 Air Liquide Buse a allumage piezo-electrique et module d'allumage comportant une telle buse
BE1006302A3 (fr) * 1988-04-20 1994-07-19 Air Liquide Buse, notamment a allumage piezo-electrique, et module d'allumage comportant une telle buse.
EP0403246A3 (de) * 1989-06-14 1991-03-06 Jon Bogue Beatty Autogenschneidbrenner
AU626689B2 (en) * 1989-06-14 1992-08-06 Jon Bogue Beatty Cutting torch

Also Published As

Publication number Publication date
JPS5827619U (ja) 1983-02-22
EP0072764A3 (de) 1984-07-18

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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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Effective date: 19820820

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Inventor name: KUBOTA, YOSINORI