EP 0538293 B1 19950906 - PLASMA BURNER FOR TRANSFERRED ARC.
Title (en)
PLASMA BURNER FOR TRANSFERRED ARC.
Title (de)
PLASMABRENNER FÜR ÜBERTRAGENEN LICHTBOGEN.
Title (fr)
CHALUMEAU A PLASMA A ARC ELECTRIQUE TRANSMIS.
Publication
Application
Priority
- DE 9100551 W 19910701
- DE 4022112 A 19900711
Abstract (en)
[origin: WO9201360A1] Parasitic arcs occurring in the operation of plasma burners adversely affect economic running and endanger important parts of the burner. Known couter-measures are successful only to a limited extent. Fitting the annular channel between the electrodes and the surrounding nozzle conveying the plasma gas on the inside with an electrically insulating cladding provides only partial protection. Insulating the section of the inner wall of a water-cooled nozzle adjacent the front wall from the outer section is very expensive in construction and insulation. It is therefore proposed to arrange transfer channels (43, 44) uniformly distributed around the periphery between the annular channel (17) for the plasma gas and that (33) between the nozzle end (3) and the burner casing (16) through which part of the plasma gas is diverted and used to cool the end of the nozzle and to force electrically conductive deposits of dusts and the like and back-striking plasma arcs. A sliding flange (29) on this annular channel (33) also counteracts electrical bridge formation from soiling by temperature-caused relative movements.
IPC 1-7
IPC 8 full level
B23K 10/00 (2006.01); H05H 1/26 (2006.01); H05H 1/34 (2006.01)
IPC 8 main group level
H05H (2006.01)
CPC (source: EP KR US)
H05H 1/34 (2013.01 - EP KR US); H05H 1/341 (2013.01 - EP US); H05H 1/3457 (2021.05 - EP); H05H 1/3457 (2021.05 - US)
Designated contracting state (EPC)
AT BE DE ES FR GB IT LU NL SE
DOCDB simple family (publication)
WO 9201360 A1 19920123; AT E127652 T1 19950915; AU 8074491 A 19920204; CA 2086821 A1 19920112; CN 1058126 A 19920122; DE 4022112 A1 19920123; DE 4022112 C2 19960314; DE 59106433 D1 19951012; EP 0538293 A1 19930428; EP 0538293 B1 19950906; ES 2076536 T3 19951101; FI 921559 A0 19920408; FI 921559 A 19920408; JP 3017802 B2 20000313; JP H06501127 A 19940127; KR 920702598 A 19920904; NO 175340 B 19940620; NO 175340 C 19940928; NO 920831 D0 19920303; NO 920831 L 19920303; US 5340961 A 19940823; ZA 915337 B 19930331
DOCDB simple family (application)
DE 9100551 W 19910701; AT 91912032 T 19910701; AU 8074491 A 19910701; CA 2086821 A 19910701; CN 91104486 A 19910702; DE 4022112 A 19900711; DE 59106433 T 19910701; EP 91912032 A 19910701; ES 91912032 T 19910701; FI 921559 A 19920408; JP 51104391 A 19910701; KR 920700510 A 19920306; NO 920831 A 19920303; US 2774193 A 19930108; ZA 915337 A 19910709