EP0030679B1 - High-power plasmatron's nozzle - Google Patents

High-power plasmatron's nozzle Download PDF

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Publication number
EP0030679B1
EP0030679B1 EP80107582A EP80107582A EP0030679B1 EP 0030679 B1 EP0030679 B1 EP 0030679B1 EP 80107582 A EP80107582 A EP 80107582A EP 80107582 A EP80107582 A EP 80107582A EP 0030679 B1 EP0030679 B1 EP 0030679B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
solder
insert
cathode
cooling
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.)
Expired
Application number
EP80107582A
Other languages
German (de)
French (fr)
Other versions
EP0030679A1 (en
Inventor
Armin Grünler
Erich Pötzsch
Herbert Pietzsch
Walter Dipl. Jur. Lachner
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.)
Edelstahlwerk 8 Mai 1945 Freital VEB
Original Assignee
Edelstahlwerk 8 Mai 1945 Freital VEB
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 Edelstahlwerk 8 Mai 1945 Freital VEB filed Critical Edelstahlwerk 8 Mai 1945 Freital VEB
Priority to AT80107582T priority Critical patent/ATE6134T1/en
Publication of EP0030679A1 publication Critical patent/EP0030679A1/en
Application granted granted Critical
Publication of EP0030679B1 publication Critical patent/EP0030679B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • 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
    • H05H1/34—Details, e.g. electrodes, nozzles
    • 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
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3457—Nozzle protection devices

Definitions

  • the invention relates to a nozzle for a high-current plasmatron, the nozzle consisting of a single, interchangeable insert, designed as a wear part in its entirety, provided centrally to the cathode, and a cooling jacket being provided for the nozzle.
  • Plasma cartridges for welding, cutting and melting materials are known. They usually consist of a cathode block, the cathode and the cooling jacket with a nozzle surrounding the cathode. The plasma-forming gas flows between the cathode and the nozzle.
  • the nozzle insert is screwed into the nozzle holder.
  • the nozzles are subject to severe wear due to very high temperatures and the formation of secondary arcs. Their shelf life is only a few hours. Attempts have been made to change the geometric shape of the nozzle to improve its service life, to improve its cooling and, as described in DD-A-131 218, to manufacture the nozzle from several rings which are fitted with a sliding seal and by means of screwing or a bayonet lock be attached.
  • the aim of the invention is to reduce the cost of materials for the repair, to reduce the repair time and the repair costs while at the same time increasing the service life of the nozzle.
  • the invention is explained in more detail with reference to the drawing.
  • the nozzle insert 1, which is designed as a wearing part, is fastened centrally around the cathode 4 by means of the solder 2 in the nozzle body 3. During the burner's operating time, the nozzle is cooled so that the solder does not melt. After the nozzle insert 1 has worn, the solder 2 is melted by heating the nozzle and the nozzle insert 1 is thus separated from the nozzle body 3. The new nozzle insert 1 is then connected to the nozzle body 3, as described above.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)
  • Arc Welding In General (AREA)

Abstract

1. A heavy-current plasmatron nozzle consisting of a single interchangeable insert (1) in the general form of a wearing element disposed centrally with respect to the cathode (4), a cooling jacket being provided for the nozzle, characterized in that the insert (1) is secured directly int he nozzle body by means of a solder (2) and the nozzle cooling is so adapted that the solder does not melt while the burner is in operation.

Description

Die Erfindung betrifft eine Düse für ein Hochstromplasmatron, wobei die Düse aus einem einzigen, in seiner Gesamtheit als Verschleißteil ausgebildeten, austauschbaren, zentrisch zur Kathode vorgesehenen Einsatz besteht, und ein Kühlmantel für die Düse vorgesehen ist.The invention relates to a nozzle for a high-current plasmatron, the nozzle consisting of a single, interchangeable insert, designed as a wear part in its entirety, provided centrally to the cathode, and a cooling jacket being provided for the nozzle.

Plasmatrone zum Schweißen, Schneiden und Schmelzen von Werkstoffen sind bekannt. Sie bestehen zumeist aus einem Kathodenblock, der Kathode und dem Kühlmantel mit einer die Kathode umgebenden Düse. Das plasmabildende Gas strömt zwischen Kathode und Düse.Plasma cartridges for welding, cutting and melting materials are known. They usually consist of a cathode block, the cathode and the cooling jacket with a nozzle surrounding the cathode. The plasma-forming gas flows between the cathode and the nozzle.

Bei einer bekannten Düse mit den Merkmalen nach dem Oberbegriff des Anspruches 1 (GB-A-1 376 527) ist der Düseneinsatz in den Düsenhalter eingeschraubt.In a known nozzle with the features according to the preamble of claim 1 (GB-A-1 376 527), the nozzle insert is screwed into the nozzle holder.

Bei Plasmatronen mit Stromstärken von mehre-- ren kA sind die Düsen durch sehr hohe Temperaturen und Nebenbogenbildung einem starken Verschleiß unterworfen. Ihre Haltbarkeit beträgt nur einige Stunden. Es wurde versucht, zur Erhöhung der Lebensdauer die geometrische Form der Düse zu verändern, ihre Kühlung zu verbessern und wie in der DD-A-131 218 beschrieben, die Düse aus mehreren Ringen zu fertigen, die mit einer Gleitdichtung aufgesetzt und durch Verschraubung oder Bajonettverschluß befestigt werden.In the case of plasma cartridges with currents of several kA, the nozzles are subject to severe wear due to very high temperatures and the formation of secondary arcs. Their shelf life is only a few hours. Attempts have been made to change the geometric shape of the nozzle to improve its service life, to improve its cooling and, as described in DD-A-131 218, to manufacture the nozzle from several rings which are fitted with a sliding seal and by means of screwing or a bayonet lock be attached.

Das Ziel der Erfindung besteht in der Senkung des Materialaufwandes für die Reparatur, der Verringerung der Reparaturzeit und der Reparaturkosten bei gleichzeitiger Erhöhung der Lebensdauer der Düse.The aim of the invention is to reduce the cost of materials for the repair, to reduce the repair time and the repair costs while at the same time increasing the service life of the nozzle.

Erfindungsgemäß wird die Aufgabe durch die im Anspruch aufgeführten Merkmale gelöst.According to the invention the object is achieved by the features listed in the claim.

Die Erfindung wird anhand der Zeichnung näher erläutert. Der als Verschleißteil ausgebildete Düseneinsatz 1 ist mittels des Lotes 2 im Düsenkörper 3 zentrisch um die Kathode 4 befestigt. Während der Betriebszeit des Brenners wird die Düse so gekühlt, daß ein Aufschmelzen des Lotes nicht erfolgt. Nach eingetretenem Verschleiß des Düseneinsatzes 1 wird durch Erwärmen der Düse das Lot 2 aufgeschmolzen und damit der Düseneinsatz 1 vom Düsenkörper 3 getrennt. Nachfolgend wird der neue Düseneinsatz 1 mit dem Düsenkörper 3, wie oben beschrieben, verbunden.The invention is explained in more detail with reference to the drawing. The nozzle insert 1, which is designed as a wearing part, is fastened centrally around the cathode 4 by means of the solder 2 in the nozzle body 3. During the burner's operating time, the nozzle is cooled so that the solder does not melt. After the nozzle insert 1 has worn, the solder 2 is melted by heating the nozzle and the nozzle insert 1 is thus separated from the nozzle body 3. The new nozzle insert 1 is then connected to the nozzle body 3, as described above.

Claims (1)

  1. A heavy-current plasmatron nozzle consisting of a single interchangeable insert (1) in the general form of a wearing element disposed centrally with respect to the cathode (4), a cooling jacket being provided for the nozzle, characterised in that the insert (1) is secured directly in the nozzle body by means of a solder (2) and the nozzle cooling is so adapted that the solder does not melt while the burner is in operation.
EP80107582A 1979-12-18 1980-12-04 High-power plasmatron's nozzle Expired EP0030679B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80107582T ATE6134T1 (en) 1979-12-18 1980-12-04 NOZZLE FOR A HIGH CURRENT PLASMATRON.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD217773 1979-12-18
DD79217773A DD151249A1 (en) 1979-12-18 1979-12-18 DUESE FOR A HIGH-POWER PLASMATRON

Publications (2)

Publication Number Publication Date
EP0030679A1 EP0030679A1 (en) 1981-06-24
EP0030679B1 true EP0030679B1 (en) 1984-02-08

Family

ID=5521715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107582A Expired EP0030679B1 (en) 1979-12-18 1980-12-04 High-power plasmatron's nozzle

Country Status (7)

Country Link
EP (1) EP0030679B1 (en)
JP (1) JPS56143700A (en)
AT (1) ATE6134T1 (en)
DD (1) DD151249A1 (en)
DE (1) DE3066523D1 (en)
ES (1) ES267927Y (en)
YU (1) YU311280A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241476A1 (en) * 1982-11-10 1984-05-10 Fried. Krupp Gmbh, 4300 Essen METHOD FOR INTRODUCING IONIZABLE GAS INTO A PLASMA OF AN ARC BURNER, AND PLASMA TORCHER FOR CARRYING OUT THE METHOD
EP0202352A1 (en) * 1985-05-22 1986-11-26 C. CONRADTY NÜRNBERG GmbH & Co. KG Plasma torch
WO1991010342A1 (en) * 1990-01-04 1991-07-11 Nkk Corporation Moving plasma torch
NL1040070C2 (en) * 2013-02-27 2014-08-28 Hho Heating Systems B V PLASMATRON AND HEATING DEVICES INCLUDING A PLASMATRON.
DE102016119984A1 (en) * 2016-10-20 2018-04-26 Röder Maschinenbau GmbH Method and use for the reprocessing of wear parts of blast cutters and component for receiving an insert

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260053B (en) * 1966-02-08 1968-02-01 Peene Werft Wolgast Veb Plasma torch for underwater cutting
GB1281166A (en) * 1968-12-12 1972-07-12 Ass Eng Ltd Improvements in plasma guns
DE2046983A1 (en) * 1970-09-24 1972-03-30 Messer Griesheim Gmbh, 6000 Frankfurt Torches, in particular for plasma torches
DE2116968A1 (en) * 1971-04-07 1972-10-19 Messer Griesheim Gmbh Centering system for plasma torches with pin electrode
DE2142331A1 (en) * 1971-08-24 1973-03-08 Messer Griesheim Gmbh NOZZLE BODY FOR PLASMA CUTTING AND / OR WELDING TORCHES
DE2143176C3 (en) * 1971-08-28 1978-05-03 Messer Griesheim Gmbh, 6000 Frankfurt Plasma welding and / or cutting torches
US3825718A (en) * 1971-12-08 1974-07-23 O Mosiashvili Plasmatron
AT318768B (en) * 1972-09-08 1974-11-11 Boehler & Co Ag Geb Method and device for igniting a high-frequency plasma torch
US3849584A (en) * 1973-10-24 1974-11-19 B Paton Plasma arc torch
DE2803580C2 (en) * 1978-01-27 1981-09-17 Messer Griesheim Gmbh, 6000 Frankfurt Device for plasma welding and / or cutting

Also Published As

Publication number Publication date
DE3066523D1 (en) 1984-03-15
YU311280A (en) 1983-09-30
EP0030679A1 (en) 1981-06-24
JPS56143700A (en) 1981-11-09
ATE6134T1 (en) 1984-02-15
DD151249A1 (en) 1981-10-08
ES267927Y (en) 1984-05-01
ES267927U (en) 1983-11-01

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