Plasma Cutting Torch, Nozzle And Shield Cap

摘要

A plasma torch assembly, and components thereof, is provided with optimized attributes to allow for improved torch durability add versatility. A torch nozzle is provided having a novel design, including exterior cooling channels running along a length of the nozzle. An improved inner retaining cap assembly is provided which imparts a swirl on shield gas flow. Additionally, a shield cap and outer retainer have optimized geometries to allow the torch to be made narrower to facilitate the cutting of complex 3-D shapes and bevel cuts not attainable with known mechanized plasma torches.

主权项

1. A plasma cutting nozzle; comprising:
an upstream portion having at least two o-ring grooves, a nozzle removing groove on an outer surface thereof and a first maximum outside diameter, where said first maximum outside diameter is the largest outside diameter of said nozzle; a transition portion coupled to and positioned adjacent to said upstream portion in a downstream direction relative to a flow along said nozzle, said transition portion comprising:
a cylindrical portion having a second maximum outside diameter which is smaller than said first maximum outside diameter;an angled portion, positioned downstream of said cylindrical portion, having a conical shape which reduces the outside diameter of said nozzle from said second maximum outside diameter; anda plurality of cooling channels positioned radially around an outer surface of said transition portion; a distal portion coupled to and positioned adjacent to said transition portion in a downstream direction relative to a flow along said nozzle, said distal portion comprising:
at least one o-ring groove;an inner retaining cap seat portion; anda distal cooling portion having a cylindrical shape and a flat distal end surface, wherein said retaining cap seat portion is positioned between said at least one o-ring groove and said distal cooling portion; and an inner cavity within said nozzle which comprises a swirl ring seating surface within said cavity.