High frequency induction coupled plasma torch with concentric pipes having flanges thereon
AssigneeSumitomo Electric Industries, Ltd.
InventorsGotaro Tanaka, Kunio Fujiwara, Tetsuo Miyajiri
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Abstract
A high frequency induction coupled plasma torch is disclosed. The torch is comprised of a multi-pipe structure and is used for forming a plasma flame by high frequency power induction. The torch is comprised of a plurality of pipes which are coaxially arranged within each other. Each of the pipes has one or more flanged openings positioned on its surface whereby it is interconnected to the adjacent pipe. By means of the flanged openings any given pipe may be interconnected with any number of outer pipes. The torch can be economically produced and maintained.
Claims18
A high frequency induction coupled plasma torch employing a concentric pipe assembly passing plasma gas therethrough and generating a plasma flame at one end of said pipe assembly, said pipe assembly comprising,
- at least first and second cylindrical pipes;
- said first pipe comprising an elongated cylindrical portion and an outer portion extending from said elongated cylindrical poriton near a base of said first cylindrical pipe, said outer portion terminating in a flanged opening having a flange surrounding but not in contact with said first cylindrical pipe;
- said second pipe comprising an elongated cylindrical portion terminating in an outward bottom flange at the end opposite the end at which a flame is generated;
- the elongated cylindrical portion of said first pipe being inside and coaxial with the elongated cylindrical portion of said second pipe, and said flange of said first pipe mating and being fastened to said outward bottom flange of said second pipe;
- and
- clamping means for fastening together said flange of said first pipe and said outward bottom flange of said second pipe, said clamping means permitting adjustment of the relative positions of said first and second pipes.
Dependencies are inferred from the claim text.