Indirect plasmatron

H - Electricity – 05 – H

Patent

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Details

H05H 1/26 (2006.01) B23K 10/00 (2006.01) H05H 1/32 (2006.01) H05H 1/34 (2006.01)

Patent

CA 2225211

The indirect plasmatron comprises a neutrode assembly comprising a plurality of plate-shaped electrode members which are electrically insulated from each other. In its interior, the neutrode assembly defines an elongated plasma channel. The outlet aperture for the plasma torch is in the shape of an elongate slot and extends parallel to the central longitudinal axis of the plasma channel. Each of the two electrodes of the plasmatron is surrounded by a cavity through which an inert gas can be fed into the plasma channel. For the purpose of stabilizing the electric arc, at least one pair of permanent magnet members is provided. Their magnetic field exerts a force onto the electric arc which is directed opposite to the force exerted onto the electric arc by the flow of the plasma gas. Particular neutrodes are provided with a channel for feeding a further gas into the plasma channel.

Le plasmatron indirect comprend un dispositif à neutrode constitué de plusieurs éléments d'électrodes en forme de plaque, qui sont électriquement isolés les uns des autres. A l'intérieur, le dispositif à neutrode délimite un canal allongé pour le plasma. L'ouverture de la sortie de la torche « plasma » a la forme d'une fente allongée et elle s'étend parallèlement à l'axe central longitudinal du canal pour le plasma. Chacune des deux électrodes du plasmatron est entourée par une cavité à travers laquelle un gaz inerte peut être introduit dans le canal pour le plasma. Pour stabiliser l'arc électrique, au moins deux aimants permanents sont utilisés. Leur champ magnétique exerce une force sur l'arc électrique, qui est orientée à l'opposé de la force exercée sur l'arc électrique par l'écoulement du plasma gazeux. Des neutrodes spéciales sont munies d'un canal pour introduire un autre gaz dans le canal pour le plasma.

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