Transfer-type plasma torch

Details Transfer-type plasma torch Transfer-type plasma torch

H - Electricity

05

B

327/72

H05B 7/08 (2006.01) H05H 1/34 (2006.01) H05H 1/28 (2006.01)

Patent

CA 1311280

ABSTRACT OF THE DISCLOSURE Disclosed is a transfer-type plasma torch which may be used to heat objects, e.g., to heat molten steel at a certain stage of being supplied from a converter to a continuous casting mold After a trigger electric discharge has been produced between the cathode and the ignition anode of the plasma torch, electric discharge is effected between the cathode and an object to be treated that is set as the anode. The plasma torch includes a cylindrical cathode-holding member having therein a space allowing the flow of coolant, an ignition anode disposed within the cathode-holding member, and a ring-shaped cathode disposed on an inner periphery of the cathode- holding member and positioned below the tip of the ignition anode, with the tip portion of the cathode projecting downward from the bottom face of the cathode- holding member. This arrangement makes a conventionally- provided nozzle unnecessary, thereby enabling a reduction in diameter of the entire torch while enabling a relative increase in diameter of the cathode. Thus, the plasma torch is capable of exhibiting a large capacity for arc current.

597501

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