WO1999065281A2 - Generateur de plasma a arc - Google Patents

Generateur de plasma a arc Download PDF

Info

Publication number
WO1999065281A2
WO1999065281A2 PCT/DE1999/001681 DE9901681W WO9965281A2 WO 1999065281 A2 WO1999065281 A2 WO 1999065281A2 DE 9901681 W DE9901681 W DE 9901681W WO 9965281 A2 WO9965281 A2 WO 9965281A2
Authority
WO
WIPO (PCT)
Prior art keywords
discharge space
plasma generator
arc plasma
plasma
thermally conductive
Prior art date
Application number
PCT/DE1999/001681
Other languages
German (de)
English (en)
Other versions
WO1999065281A3 (fr
Inventor
Friedhelm DÜRBAUM
Walter Dürbaum
Peter Puschner
Christian SCHÖNEFELD
Tejas SCHÖNEFELD
Original Assignee
Duerbaum Friedhelm
Duerbaum Walter
Peter Puschner
Schoenefeld Christian
Schoenefeld Tejas
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 Duerbaum Friedhelm, Duerbaum Walter, Peter Puschner, Schoenefeld Christian, Schoenefeld Tejas filed Critical Duerbaum Friedhelm
Priority to DE19981056T priority Critical patent/DE19981056D2/de
Priority to AU51526/99A priority patent/AU5152699A/en
Publication of WO1999065281A2 publication Critical patent/WO1999065281A2/fr
Publication of WO1999065281A3 publication Critical patent/WO1999065281A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc

Definitions

  • the invention relates to an arc plasma generator (plasmatron).
  • the invention relates to an arc plasma generator, in which a discharge space is created by means of a plasma-forming medium
  • Plasma is generated and a thermally conductive body is connected to a reservoir in which a working medium for providing the plasma-forming medium is stored.
  • the invention relates to an arc plasma generator in which a plasma is generated in a discharge space by means of a plasma-forming medium and the discharge space is at least partially surrounded by at least one insert.
  • the present invention relates to an arc plasma generator in which a fluid is supplied to a discharge space via a first anode-side fluid stream and a second cathode-side fluid stream.
  • the present invention is applicable to plasma generators in which steam, preferably water vapor, is used as the plasma-forming medium.
  • Such an arc plasma generator is known for example from WO-A2- 95/17278.
  • an anode designed as a nozzle and a rod cathode are correspondingly arranged axially on one housing.
  • the cathode is arranged in a discharge space which is surrounded by a sleeve-like insert made of heat-conductive material located in the housing.
  • a tube made of thermally conductive material is provided axially, which is supported on the sleeve-like insert by means of a flange.
  • a cathode holder for the cathode is mounted in this tube in an electrically insulated manner.
  • Channels are present in the flange, which on the one hand lead to the discharge space and on the other hand are in contact with a porous material which is arranged on the side of the flange facing away from the anode and which in turn, like the flange and tube, also has a high thermal conductivity.
  • the porous material is in contact with a water reservoir which surrounds the thermally conductive tube.
  • the sleeve-like insert in turn has channels on its outer surface and on its side facing the anode.
  • the thermal energy released with the ignition of the arc between the electrodes causes a progressive evaporation of the water stored in the porous material, the steam generated entering the discharge chamber through the channels.
  • the resulting plasma jet is discharged through the anode designed as a nozzle.
  • the overpressure necessary for the operation of the generator is also provided by the evaporation process.
  • the water vapor passed through the channels also serves to cool the anode and the cathode.
  • the invention proposes an arc plasma generator in which a discharge space is supplied with a fluid via a first anode-side fluid flow and a second cathode-side fluid flow, a third fluid flow being provided, through which fluid is likewise supplied to the discharge space.
  • the third fluid flow can be arranged between the first and the second fluid flow and can be supplied to the discharge space.
  • the fluid can comprise a plasma-forming medium, such as water vapor.
  • the fluid can comprise a medium that serves only as a coolant.
  • the fluid serves both as a coolant and as a plasma-forming medium.
  • the gas rate can advantageously be increased by providing a third fluid flow.
  • the third fluid flow is arranged between the anode-side and the cathode-side fluid flow, it is possible to increase the distance between the anode and the cathode. This makes it possible to increase the working temperature of the plasma jet and the energy input to the workpiece to be machined.
  • the increase in the gas rate according to the invention also requires a necessary, increased cooling of the electrodes.
  • discharge space does not necessarily have to be a space which is closed on all sides. Rather, the term “discharge space” denotes the spatial area in which the discharge takes place between the anode and the cathode and the plasma is thus generated.
  • the invention also proposes an arc plasma generator in which a plasma is generated in a discharge space by means of a plasma-forming medium and a thermally conductive body is connected to a reservoir in which a working medium for providing the plasma-forming medium is stored, wherein the heat-conductive body has openings on the reservoir side with at least two boundary walls that are at least regular in the opening direction.
  • the regular boundary walls of the thermally conductive body according to the invention allow a much better fluid transport. In this way, the working medium can be brought into contact with the thermally conductive body much more easily.
  • the regular boundary walls also make it possible for a plasma-forming medium, such as water vapor, to be transported away from or along the heat-conductive body much more easily. With this arrangement, this simplified transport can advantageously provide a significantly higher gas rate.
  • the regular boundary walls are characterized by their completely different geometry than the irregular structure of a porous material.
  • An opening according to the invention thus has at least two walls which project relatively uniformly into the thermally conductive body.
  • the walls can be arranged parallel to one another, but also at an angle to one another.
  • the boundary walls are advantageously arranged in such a way that the working medium is transported into the opening by capillary forces. As a result, a large amount of working medium becomes the in a particularly advantageous manner transported thermally conductive body and a correspondingly high gas rate can be generated.
  • the present invention furthermore proposes an arc plasma generator in which a plasma is generated in a discharge space by means of a plasma-forming medium and a thermally conductive body is connected to a reservoir in which a working medium for providing the plasma-forming medium is stored, wherein the thermally conductive body has at least one channel pointing towards the discharge space and open towards the reservoir.
  • a channel ensures rapid transport of the working medium or a plasma-forming medium to the discharge space.
  • the working medium can penetrate into the channel on the reservoir side and evaporate in it when it has reached a point on the thermally conductive body which has a corresponding temperature.
  • the remaining distance of the channel in the direction of the discharge space can then be transported in this channel, the evaporated medium, for example as a plasma-forming medium.
  • Such transport is also possible in particular if there is still undevaporated working medium outside the duct.
  • a channel according to the invention is distinguished from the random, tortuous and branching paths of a porous body in that it requires a relatively straight path for the medium flowing in it.
  • the gas rate and the evaporation rate are increased in the manner according to the invention by the rapid transport of the working medium or plasma-forming medium.
  • the present invention also proposes. with an arc
  • Plasma generator in which a plasma is generated in a discharge space by means of a plasma-forming medium and a thermally conductive body is connected to a reservoir.
  • a working medium for providing the plasma-forming medium is stored to increase the gas rate in that the heat-conductive body has an end face on the discharge space side, which is provided with at least one coiled flow channel.
  • the term “on the discharge space side” does not necessarily have to refer to a side of the thermally conductive body that borders directly on the discharge space. Rather, in the present context, the term “on the discharge space side” denotes a side of the thermally conductive body which faces the discharge space. In particular, this term relates to the side of the thermally conductive body that is last in contact with the plasma-forming medium when it flows to the discharge space.
  • the flow channel is preferably connected to a channel of the thermally conductive body that is open toward the reservoir. As a result, the flow resistance, which is caused by the thermally conductive body, can be further reduced.
  • the reservoir is preferably filled with a liquid-absorbing material and is filled with the working medium before use of the generator. It is understood that, on the other hand, the reservoir can be designed as a continuously filled reservoir.
  • thermally conductive body follows if it has a lamella-like surface.
  • slats openings according to the invention with regular boundary walls can be provided in a simple manner.
  • the thermally conductive body can be cylindrical. This accommodates a rotationally symmetrical arrangement of the anode and cathode. In this case, a spiral channel can be formed on the surface of the thermally conductive body. This ensures a particularly uniform evaporation along the channel, which also benefits a high gas rate.
  • this channel can be delimited by thin walls, ie lamellar walls. This requires a particularly uniform heat input into the channel and thus also a correspondingly uniform evaporation.
  • the regular boundary walls of the lamellar structure a good fluid transport through the channel.
  • the gas rate can be increased in that the Channel of the insert is formed by a lamellar structure.
  • the lamella-like structure ensures on the one hand the largest possible channel cross-section.
  • the lamellar structure requires a high surface contact with the fluid flowing in the channels. Since the insert is heated due to its proximity to the discharge space, this advantageously ensures a high temperature of the plasma-forming medium and, on the other hand, advantageously cools the insert.
  • the present invention proposes to increase the vapor rate in an arc plasma generator in which a plasma is generated in a discharge space by means of a plasma-forming medium and the discharge space is at least partially surrounded by at least one insert which has at least one flow channel on a side facing an anode , before configuring this flow channel.
  • the vortices introduced by the spiral advantageously increase the total gas flow, as already explained above in relation to the flow channels on the thermally conductive body.
  • the flow channel is advantageously connected to at least one channel on an outer surface of the insert, so that an unobstructed gas flow is also ensured at this point.
  • the gas flow can also be increased in such a way that in an arc plasma generator in which a plasma is generated in a discharge space by means of a plasma-forming medium and the discharge space is at least partially surrounded by at least one insert, the insert has at least one bore, that leads from an outer surface of the insert to the discharge space.
  • the additional fluid channel provided in this way serves, in addition to increasing the total gas flow, also an additional entry of plasma-forming medium into the discharge space. This additional entry makes it possible to further remove the cathode and anode from one another, so that a higher variability in working temperature and energy input on the workpiece can be guaranteed.
  • the insert is designed as a sleeve-like insert and has an essentially cylindrical outer surface, this accommodates a rotationally symmetrical arrangement of the anode, cathode and discharge space.
  • the above features also individually or in individual combinations with one another provide an arc plasma generator with a high gas rate according to the invention.
  • these features ensure a correspondingly high gas flow, particularly when interacting with one another.
  • the construction described allows the generation of an improved plasma jet, in particular a constricted plasma jet, which leads to significantly increased quality characteristics on the workpiece to be processed, such as cutting thickness, cutting quality, cutting speed, permissible beard formation and the like. leads.
  • FIG. 1 shows an arc plasma generator according to the invention in section
  • Figure 2 shows the heat-conducting body of the arc plasma generator
  • FIG. 1 in a partially sectioned, schematic representation
  • FIG. 3 shows the heat-conducting body according to FIG. 2 in a front view
  • FIG. 4 shows the heat-conducting body according to FIG. 2 in rear view
  • Figure 5 shows the sleeve-like use of the arc plasma generator
  • Figure 6 shows the sleeve-like insert of Figure 5 in a front view
  • Figure 7 shows a second arc plasma generator according to the invention in a schematic section
  • Figure 8 is a schematic diagram of the electrical excitation circuit for the
  • the arc plasma generator shown in the figures comprises a housing 1, on which an anode 2 designed as a nozzle and a rod cathode 3, which is held by a cathode holder 4, are arranged axially.
  • a discharge space 16 is formed between anode 2 and cathode 3.
  • a sleeve-like insert 11 is also arranged in the housing 1 and partially surrounds the discharge space 16.
  • a heat-conducting body 5 is supported on the side of the sleeve-like insert 11 facing away from the anode 2.
  • This thermally conductive body 5 is cylindrical and surrounds the cathode holder 4, with between
  • An insulator 4 ' is provided for the cathode holder 4 and the thermally conductive body 5.
  • the thermally conductive body 5 Radially on the outside, the thermally conductive body 5 is in contact with a reservoir 6, which is filled with a liquid-sorbing material 10.
  • the thermally conductive body 5 has a chamfered end face 7 on the discharge space side.
  • helical flow channels 8 are formed as grooves.
  • the heat-conductive body 5 has channels 9 in its cylindrical region (shown only partially in section). These channels 9 are formed by a lamellar structure and in this case have openings 9 ′ which are delimited by two regular boundary walls 9 ′′.
  • four channels 9 are provided, which are arranged parallel to one another, spirally on the surface of the cylindrical body 5 Each of these channels 9 opens into one of the coiled flow channels 8 on the end face 7.
  • the cylindrical surface of the sleeve-like insert is similar to the surface of the thermally conductive body 5 (see FIG. 5).
  • the sleeve-like insert 11 also has channels 14 on its cylindrical surface, which open into coiled flow channels 13.
  • the coiled flow channels 13 are formed on a chamfered end face 12 which, in the assembled state, bears against the anode 2 (see FIG. 1).
  • From the cylindrical surface of the sleeve-like insert 11 furthermore bores 15 which radially point to the discharge space 16.
  • the sleeve-like insert 11 on its side facing the thermally conductive body 5 has a chamfered contact surface 17.
  • the chamfers of the chamfered contact surface 17 and chamfered end surface 7 are selected such that sleeve-like insert 11 and thermally conductive body 5 rest against one another in the assembled state (see FIG. 1).
  • the chamfered surfaces 7, 12 and 17 as well as the inside of the anode 2 are designed in such a way that the coiled flow channels 8 and 13 are formed enclosed on all sides in the assembled state.
  • the reservoir 6 is first filled with an appropriate working fluid, for example water, between the anode 2 and the cathode
  • a voltage is applied and an arc is ignited between anode 2 and cathode 3 by moving the cathode 3 towards the anode 2.
  • the heat energy released in the discharge space 16 heats the thermally conductive body 5 and vaporizes the working fluid in the channels 9.
  • a corresponding excess pressure is generated and the water vapor, as a plasma-forming medium, is led through the channels 9 and the coiled flow channel 8 of the thermally conductive body 5 and through the channels 14, the coiled flow channels 13 and the bores 15 of the sleeve-like insert 11 to the discharge space 16 .
  • the gaseous medium is set in a rotating movement. This ensures a particularly constricted plasma jet with a high working temperature and high gas rate.
  • the gaseous medium flowing over the coiled flow channels 8 and the bores 15 serves to cool the cathode 3, while the cooling of the anode 2 takes place primarily through the gaseous medium flowing through the coiled flow channels 13.
  • the cooling of the rear part of the cathode holder 4 and of the thermally conductive body 5 is due to a suitable design of the overall arrangement and the this ensures a sufficiently high gas or evaporation rate.
  • the gas flow entering is ionized by the arc, heated to a high temperature and converted into a plasma. It exits the anode 2 as a rotating and narrowly constricted plasma jet.
  • the arc plasma generator shown in FIGS. 7 and 8 essentially corresponds to that described above.
  • the thermally conductive body 5 ' is constructed as an essentially smooth tube and only has channels at its end facing the discharge space 16. These channels are only in contact with the reservoir 6 on their side facing away from the discharge space 16.
  • the channels are designed, on the one hand, as channels that run in a ring around the cathode 3 or the cathode holder 4, and on the other hand, as channels that are spirally coiled.
  • This creates particularly fine lamellar structures with a large surface area, which ensure particularly good evaporator properties.
  • capillary forces which are mainly coaxial with the cathode holder are used to convey liquid from the reservoir 6 to the evaporator 5 '.
  • the channels of the sleeve-like insert 11 can also be designed in a similar manner.
  • thermally conductive body 5 or 5 'and the sleeve-like insert 11 can also be formed in one piece, as long as there are sufficient supply channels from the heat-conductive body into the discharge space 16.
  • the reservoir 6 has a valve 6 ', which enables the reservoir 6 to be filled with pressure.
  • valve 6 can be designed, for example, as a check valve. Such an arrangement avoids spilling or overflowing of working fluid.
  • a two-component anode can be provided in order to avoid or largely reduce sticking of the arc.
  • This anode can consist of a metallic main body, for example of highly conductive material such as copper, as well as a stainless steel bushing provided in the anode opening or a coating of polocrystalline diamond. With these materials, annealing occurs in a less pronounced form.
  • the excitation current can be modulated if characteristic current and voltage values occur at the current source of the arc plasma generator for the stick to stick.
  • the cathode 3 and the cathode holder 4 are of split design. This is relatively inexpensive and provides inexpensive thermal insulation for fastening the cathode holder 4.
  • an undivided cathode in particular made of copper. Although this is more expensive, it leads to significantly improved evaporator properties on the thermally conductive body 5 or 5 '.
  • the cathode is rigidly attached to the housing contrary to the known generic arc plasma generators.
  • the plasma is ignited by a high-frequency ignition 20, which controls a choke 22 in the excitation circuit of the arc plasma generator via a high-frequency coupling winding 21.
  • the arc plasma generator is fed by a current source 23.
  • a current source 23 This includes a regulated high voltage source, which is regulated as a current source.
  • the current source 23 controls the high-frequency ignition 20 on the one hand and can be excited by a modulator 24 on the other hand.
  • This is chosen in such a way that it enables an almost freely selectable curve shape.
  • a symmetrical sinusoidal or rectangular curve is preferably used, which changes the plasma flow around its mean value.
  • This is used in particular when the arc plasma generator is used for cutting, a modulation preferably taking place in the range between 30 Hz to 100 Hz. In this way, a stable plasma emerging axially from the plasma nozzle can be ensured.
  • the modulation can also be used to prevent the arc from sticking.
  • the current source 23 according to the invention has the behavior of a voltage source in the event of brief disturbances or brief changes in characteristics, which has an advantageous effect on the overall characteristic of the arc plasma generator.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)

Abstract

L'objectif de la présente invention est de garantir un flux gazeux élevé dans un générateur de plasma à arc. L'invention concerne donc un générateur de plasma à arc comportant une anode (2) et une cathode (3), dans lequel un fluide est amené à une chambre de décharge (16) sous la forme d'un premier courant de fluide, côté anode, et d'un second courant de fluide, côté cathode, le fluide arrivant également dans la chambre de décharge (16) sous la forme d'un troisième courant de fluide. Le générateur présenté comporte en outre un corps conducteur de chaleur qui possède au moins un canal avec des parois de délimitation régulières et au moins un canal d'écoulement hélicoïdal sur une face se trouvant côté chambre de décharge. De plus, ledit générateur peut également comprendre une pièce rapportée (11) en forme de douille qui est pourvue d'un canal se trouvant sur sa surface extérieure, d'un canal d'écoulement hélicoïdal se trouvant côté anode et d'alésages.
PCT/DE1999/001681 1998-06-08 1999-06-08 Generateur de plasma a arc WO1999065281A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19981056T DE19981056D2 (de) 1998-06-08 1999-06-08 Lichtbogen-Plasmagenerator
AU51526/99A AU5152699A (en) 1998-06-08 1999-06-08 Arc plasma generator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998125555 DE19825555A1 (de) 1998-06-08 1998-06-08 Lichtbogen-Plasmagenerator
DE19825555.1 1998-06-08

Publications (2)

Publication Number Publication Date
WO1999065281A2 true WO1999065281A2 (fr) 1999-12-16
WO1999065281A3 WO1999065281A3 (fr) 2000-04-06

Family

ID=7870283

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/001681 WO1999065281A2 (fr) 1998-06-08 1999-06-08 Generateur de plasma a arc

Country Status (3)

Country Link
AU (1) AU5152699A (fr)
DE (2) DE19825555A1 (fr)
WO (1) WO1999065281A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10061828B4 (de) * 2000-12-12 2011-03-31 Plasmatreat Gmbh Verfahren zum Einbringen von Material in einen Plasmastrahl und Plasmadüse zur Durchführung des Verfahrens
DE10310623B8 (de) * 2003-03-10 2005-12-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zum Erzeugen eines Plasmas durch elektrische Entladung in einem Entladungsraum
AT502448B1 (de) 2005-09-09 2007-06-15 Fronius Int Gmbh Wasserdampfplasmabrenner
DE102019126640A1 (de) * 2019-10-02 2021-04-08 Gebr. Heller Maschinenfabrik Gmbh Lichtbogen-Drahtspritzeinrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341672A1 (fr) * 1988-05-11 1989-11-15 The Perkin-Elmer Corporation Pistolet-pulvérisateur à chaud à haute vitesse et méthode
EP0735805A1 (fr) * 1993-12-17 1996-10-02 Adamas At Ag Pistolet plasma a arc electrique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2525939A1 (de) * 1975-06-11 1976-12-23 Messer Griesheim Gmbh Plasmalichtbogenbrenner
US4506136A (en) * 1982-10-12 1985-03-19 Metco, Inc. Plasma spray gun having a gas vortex producing nozzle
DE3426410A1 (de) * 1984-07-18 1986-01-23 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Schweissbrenner zum plasma-mig-schweissen
SE447461B (sv) * 1985-04-25 1986-11-17 Npk Za Kontrolno Zavaratschni Sammansatt munstycke for plasmatron
EP0474899A1 (fr) * 1990-09-11 1992-03-18 Tadahiro Shimadzu Méthode et dispositif pour générer un jet de flammes de plasma

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341672A1 (fr) * 1988-05-11 1989-11-15 The Perkin-Elmer Corporation Pistolet-pulvérisateur à chaud à haute vitesse et méthode
EP0735805A1 (fr) * 1993-12-17 1996-10-02 Adamas At Ag Pistolet plasma a arc electrique

Also Published As

Publication number Publication date
AU5152699A (en) 1999-12-30
DE19825555A1 (de) 1999-12-09
WO1999065281A3 (fr) 2000-04-06
DE19981056D2 (de) 2001-07-26

Similar Documents

Publication Publication Date Title
DE2025368C3 (de) Elektrischer Lichtbogenbrenner
DE102009016932B4 (de) Kühlrohre und Elektrodenaufnahme für einen Lichtbogenplasmabrenner sowie Anordnungen aus denselben und Lichtbogenplasmabrenner mit denselben
DE102008018530B4 (de) Düse für einen flüssigkeitsgekühlten Plasmabrenner, Anordnung aus derselben und einer Düsenkappe sowie flüssigkeitsgekühlter Plasmabrenner mit einer derartigen Anordnung
EP2804450B1 (fr) Pièce isolante en plusieurs parties pour une torche à arc plasma, torche et agencements associés dotés de celle-ci et procédé associé
DE102009006132A1 (de) Düse für einen flüssigkeitsgekühlten Plasmabrenner, Düsenkappe für einen flüssigkeitsgekühlten Plasmabrenner sowie Plasmabrennerkopf mit derselben/denselben
DE2306022C3 (de) Plasmabrenner mit Achsialzufuhr des stabilisierenden Gases
EP2849542B1 (fr) Structure d'électrodes pour torches de coupage au plasma
DE7148539U (de) Plasmastrahlgenerator
DE202009018173U1 (de) Düsenschutzkappe und Düsenschutzkappenhalter sowie Lichtbogenplasmabrenner mit derselben und/oder demselben
EP0017201B1 (fr) Chalumeau à plasma à courant continu
EP2855071B1 (fr) Chalumeau pour le soudage au tungstène et au gaz inerte
EP2667689B1 (fr) Électrode pour chalumeau de coupe au plasma ainsi que son utilisation
EP1922909B1 (fr) Chalumeau a plasma a vapeur d'eau
WO1999065281A2 (fr) Generateur de plasma a arc
DE102016006626A1 (de) Mehrfachkomponentenelektrode für einen plasmaschneidbrenner sowie brenner, der diese enthält
DE102009031857B4 (de) Düse für einen flüssigkeitsgekühlten Plasmabrenner sowie Plasmabrennerkopf mit derselben
EP1532848B1 (fr) Lampe a decharge gazeuse
DE102008028166B4 (de) Vorrichtung zur Erzeugung eines Plasma-Jets
DE102009060849A1 (de) Düse für einen flüssigkeitsgekühlten Plasmabrenner sowie Plasmabrennerkopf mit derselben
DE102011089090B4 (de) Gasentladungslampe mit Kühleinrichtung
AT256268B (de) Anordnung zur düsenlosen Herstellung eines Plasmastrahles
AT216480B (de) Lichtbogenbrenner
DD292582A5 (de) Plasmatron zur erzeugung von bogen- und strahlplasmen
DE1095404B (de) Anordnung zur Erzeugung von Mikrowellenimpulsen mit einer Magnetronroehre
DD282563A5 (de) Plasmatronkatode hoher standzeit

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REF Corresponds to

Ref document number: 19981056

Country of ref document: DE

Date of ref document: 20010726

WWE Wipo information: entry into national phase

Ref document number: 19981056

Country of ref document: DE

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA