Patent ID: 6137078
Filing Date: 2000-10-24
Classification: H05H

Abstract:
A nozzle assembly for use in a torch head of a plasma torch apparatus, comprising:a nozzle means including a nozzle body means of essentially cylindrical configuration having a central longitudinal axis;an opening running through said nozzle body means and being located coaxially with said central longitudinal axis, said opening having an inlet end and an outlet end;a plurality of cooling channels running through the interior of said nozzle body means and being arranged symmetrically around said central longitudinal axis;at least two powder supply channels located in the region of said outlet end of said opening, said at least two powder supply channels extending in essentially radial direction with respect to said central longitudinal axis and opening into said opening;each of said cooling channels extending in axial direction through said nozzle body means up to said outlet end of said opening;each of said powder supply channels running through said nozzle body means from an outside thereof and between two adjacent cooling channels to said opening;a nozzle support means having a central opening adapted for receiving said nozzle body means;said nozzle support means being provided with cooling duct means that are adapted to be hydraulically coupled to said cooling channels provided in said nozzle body means such as to constitute a nozzle cooling circulation system,said nozzle support means being provided with a collar means protruding into said opening adapted to receive said nozzle means,said collar means being provided with a recess corresponding in shape and dimension to an annular groove provided in an annular end face means of said nozzle body means, whereby said cooling duct means of said nozzle support means communicate with said recess.