EP2063178A1 - Elektronische Zündvorrichtung für Sauerstoff-Gas-Schweißgeräten - Google Patents

Elektronische Zündvorrichtung für Sauerstoff-Gas-Schweißgeräten Download PDF

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Publication number
EP2063178A1
EP2063178A1 EP07301586A EP07301586A EP2063178A1 EP 2063178 A1 EP2063178 A1 EP 2063178A1 EP 07301586 A EP07301586 A EP 07301586A EP 07301586 A EP07301586 A EP 07301586A EP 2063178 A1 EP2063178 A1 EP 2063178A1
Authority
EP
European Patent Office
Prior art keywords
electrodes
gas
source
lever
switch
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Withdrawn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
EP07301586A
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English (en)
French (fr)
Inventor
Gianfabio Del Corso
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
Air Liquide Italia SpA
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Air Liquide Italia SpA
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, Air Liquide Italia SpA filed Critical Air Liquide SA
Priority to EP07301586A priority Critical patent/EP2063178A1/de
Publication of EP2063178A1 publication Critical patent/EP2063178A1/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Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to an electronic ignition device in particular for oxy-gas welding apparatus, that is to say a device adapted to and designed to initiate the combustion of welding gases expelled by the nozzle of a torch oxy-gas via a generation of electric sparks between two electrodes.
  • gas saving devices for welding device comprising a support, generally mobile, cooperating with a switch member capable of interrupting the sending of gas torch welding device, when the torch is placed on the support, and therefore to obtain a flame extinction of the torch.
  • the document EP-A-1477259 also proposes a gas-saving device for a welding device comprising a support lever for receiving the torch and interrupting the sending of the gases.
  • a gas-saving device for a welding device comprising a support lever for receiving the torch and interrupting the sending of the gases.
  • no pilot flame is necessary because the gas is ignited when the torch is removed from its support, thanks to an electric spark generation between electrodes of a piezoelectric element that allow igniting the gas leaving the torch nozzle, when the operator approaches the nozzle delivering the gas of said electrodes.
  • This device can be provided with a delay allowing to defer a few seconds the generation of sparks, when the torch is removed from its support by the operator.
  • Such a device works perfectly but has in particular the disadvantage of being made of a single housing grouping all the elements, namely the spark generator, the electrical circuit, the means for controlling the gas flow, in particular the valves ...
  • the object of the invention is therefore to propose an improved ignition device for oxy-gas welding apparatus, adapted to and designed to effectively initiate by spark generation the combustion of the welding gases expelled by the nozzle of a nozzle.
  • oxy-gas torch which can be used with any welding torch, allows for several thousand gas ignition operations and does not have the aforementioned drawbacks, in particular that can be autonomous.
  • the invention also relates to a gas pipeline on which arranged an assembly according to the invention, said pipe supplying gas torch.
  • the housing 1 of the device of the invention is therefore autonomous and contains the electronic components necessary for its operation.
  • the device of the invention is powered by an electrical source 2, such as one or batteries or batteries, also integrated in the housing 1, for example two alkaline batteries type C having a voltage of 1.5 V which can be arranged in a battery holder fixed itself to the door giving access to the interior of the housing 1.
  • the electrodes 3, 4 may be ceramic.
  • the main function of the electronic device of the invention is thus to initiate the combustion of the welding gases by means of the generation of a series of electric sparks between two electrodes 3, 4, typically having a voltage of order of 10 to 15 kV.
  • the device is preferably of the capacitor discharge type and comprises a voltage booster stage.
  • the autonomous casing 1 of the invention cooperates with a welding device 20 fulfilling the function of gas saver, which comprises a lever 21 which terminates in a hook-support 22 adapted, on which comes to rest or hang the torch 30 during the periods during which the torch is not used by the user, which corresponds to the position A of the lever 21 shown schematically in FIG. Figures 2 and 3 .
  • the weight of the torch itself allows, by gravity, the closing of the welding gas distribution valve or valves of the economizer device 20 and simultaneously the support hook 22 activates a microswitch 9 to deflection which disconnects the battery 2 from the electrical circuit 8.
  • the device 1 does not consume any current and moreover, the gases supplying the torch 30 are also cut by interrupting their circulation in the pipe or ducts 40. gas supply, as illustrated in figure 4 .
  • the lever 21 moves from the rest position A to the active position B and then actuates the active part 10 of the microswitch 9 , which electrically connects the battery 1 to the electrical circuit 6 and immediately, via the aforementioned components, the generation of a cycle of high-voltage electrical sparks at the electrodes 3, 4.
  • a timer is started, which regulates the desired duration, for example equal to 5 seconds, during which the operator, by approaching the spout or nozzle of the torch 30 electric sparks, thus also the electrodes 3, 4, can initiate the combustion of the welding gases with said sparks.
  • the timer comprises an electronic circuit and is preferably of the one shot type.
  • the operator places the torch on the lever 21 with hook-holder 22 then generating the closure of the valve (s) of the gas (s). welding of the device 20 and the interruption of the electric circuit 6 since the lever arm 21 ceases to cooperate with the switch 9, 10.
  • the circuit 6 is reset and is ready to generate a successive cycle of electric sparks when the torch 30 is again removed from its support 22 to perform a new welding operation.
  • the choice of the type of components used for the electrical circuit is made taking into account that the components of the timing circuit are necessarily located near the electrodes 3, 4 which generate the high voltage electric sparks.
  • discrete components such as transistors, resistors and capacitors which are less sensitive to electromagnetic origin genes with respect to the integrated devices.
  • the ignition electrodes 3, 4 are positioned in a housing which is hermetically separated from the electrical part of the spark generator so that the gas which is sent into contact with the electrodes 3, 4 can not come into contact with the components of the electrical circuit. .
  • the electrodes 3, 4 are protected by a metal grid 5, having a mesh size such that it can not be touched, even accidentally, by the operator, and are also connected to the circuit 6 via terminals. link 3 ', 4' adapted.
  • the step up transformer is of the type with "counter-phase" windings with central tap.
  • the two electrodes reaching the high voltage values necessary to obtain the electric sparks are always in phase opposition with respect to a common ground potential, which can be the negative pole (-) of the ( or batteries).
  • a common ground potential which can be the negative pole (-) of the ( or batteries).
  • the device of the invention makes it possible to obtain fast, reliable and safe ignition of the gas for the operator.
  • the latter is preferably hermetic. This increases the security of the device.
  • Another advantage of the casing 1 of the invention is that it can be arranged on any gas saver flame welding apparatus, since the latter comprises an activation member adapted to cooperate with the micro- switch of the box, as explained above.
  • the device of the invention can be used to control the ignition of gas supplying an oxy-acetylene or oxy-propane torch, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
EP07301586A 2007-11-26 2007-11-26 Elektronische Zündvorrichtung für Sauerstoff-Gas-Schweißgeräten Withdrawn EP2063178A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07301586A EP2063178A1 (de) 2007-11-26 2007-11-26 Elektronische Zündvorrichtung für Sauerstoff-Gas-Schweißgeräten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07301586A EP2063178A1 (de) 2007-11-26 2007-11-26 Elektronische Zündvorrichtung für Sauerstoff-Gas-Schweißgeräten

Publications (1)

Publication Number Publication Date
EP2063178A1 true EP2063178A1 (de) 2009-05-27

Family

ID=39319623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07301586A Withdrawn EP2063178A1 (de) 2007-11-26 2007-11-26 Elektronische Zündvorrichtung für Sauerstoff-Gas-Schweißgeräten

Country Status (1)

Country Link
EP (1) EP2063178A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAR20120001A1 (it) * 2012-01-13 2013-07-14 Claudio Lastrucci Dispositivo di accensione per cannelli da saldatura, particolarmente per oreficeria, argenteria, gioielleria e bigiotteria
CN109654497A (zh) * 2018-12-31 2019-04-19 佛山市泓实机械制造有限公司 自动点火熄火、节省气体的点火装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB811779A (en) * 1955-04-29 1959-04-15 Alpred William Childs A new or improved ignition device
US3801260A (en) * 1973-02-22 1974-04-02 M Irwin Igniter
US3863112A (en) * 1974-04-22 1975-01-28 Eugene P Kessock Gas and acetylene torch lighter
US4113423A (en) * 1977-01-24 1978-09-12 Steiner H Karl Torch igniter
JPS5771960U (de) * 1980-10-13 1982-05-01
US4492561A (en) * 1982-12-20 1985-01-08 Braswell Richard R Welders torch igniting device
DE8420954U1 (de) * 1984-07-13 1985-03-14 Britzwein, Volker, 6093 Flörsheim Autogenbrenner
EP1477259A1 (de) 2003-05-12 2004-11-17 L'Air Liquide Société Anonyme à Directoire et Conseil de Surveillance pour l'Etude et Exploitation des Procédés Georges Claude Gas-Economiser with automatic ignition and control for oxygen-gas burners

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB811779A (en) * 1955-04-29 1959-04-15 Alpred William Childs A new or improved ignition device
US3801260A (en) * 1973-02-22 1974-04-02 M Irwin Igniter
US3863112A (en) * 1974-04-22 1975-01-28 Eugene P Kessock Gas and acetylene torch lighter
US4113423A (en) * 1977-01-24 1978-09-12 Steiner H Karl Torch igniter
JPS5771960U (de) * 1980-10-13 1982-05-01
US4492561A (en) * 1982-12-20 1985-01-08 Braswell Richard R Welders torch igniting device
DE8420954U1 (de) * 1984-07-13 1985-03-14 Britzwein, Volker, 6093 Flörsheim Autogenbrenner
EP1477259A1 (de) 2003-05-12 2004-11-17 L'Air Liquide Société Anonyme à Directoire et Conseil de Surveillance pour l'Etude et Exploitation des Procédés Georges Claude Gas-Economiser with automatic ignition and control for oxygen-gas burners

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITAR20120001A1 (it) * 2012-01-13 2013-07-14 Claudio Lastrucci Dispositivo di accensione per cannelli da saldatura, particolarmente per oreficeria, argenteria, gioielleria e bigiotteria
CN109654497A (zh) * 2018-12-31 2019-04-19 佛山市泓实机械制造有限公司 自动点火熄火、节省气体的点火装置

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