Plasma torch without high-frequency ignition, with improved electrode air-cooling devices
AssigneeTrafimet S.P.A.
InventorGiuseppe Zigliotto
Life of this patent
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Abstract
This invention relates to a plasma torch with electrode air-cooling devices, comprising: a hollow electrode systems designed to introduce cooling air into the electrode near the tip, which systems consist of a tubular element smaller than the hole in the electrode so as to form a cavity between the inner wall of the electrode and the tubular element passages designed to place the top of the electrode in communication with a ring-shaped chamber inside the torch body which surrounds the electrode passages situated in the torch body which are designed to place the said ring-shaped chamber in communication with the area surrounding the hood passages designed to place the said ring-shaped chamber in communication with the plasma chamber.
Claims10
A plasma torch comprising:
- a body having an axial internal cavity for receiving cooling air and having a reference surface therein;
- a piston having a free end and being axially movable within the cavity between a lowered position and a raised working position upon selective application of air pressure;
- a hollow electrode having an proximal end secured to the free end of the piston and movable therewith, said electrode having a free end for contacting the body when the piston is in the lowered position and being movable with the piston into precise spaced relation with the body in the working position, the proximal end of the electrode having a corresponding surface for directly engaging the reference surface within the cavity when the electrode is moved to the working position for establishing the precise spacing between the free end of the electrode and the body.
Dependencies are inferred from the claim text.