Hyperfrequency energy plasma torch
First Claim
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1. A microwave plasma torch for creating a plasma jet, comprising:
- a waveguide for connection to a microwave generator, said waveguide having lateral walls and defining an opening in a first said wall and a lateral orifice in a second said wall adjacent said first wall;
a gas supply conduit in the waveguide, the gas supply conduit having a generally T-shape defining a stem, a first upper branch and a second upper branch;
said stem of said supply conduit constituting a downstream part of said supply conduit which extends through said opening with clearance and has an open outlet end and is connected to a discharge nozzle, said first upper branch extending on a first side of said stem, through said lateral orifice without clearance and being adapted to be connected to a source of said gas, and said second upper branch being in alignment with said first branch, on a second side of said stem opposite to said first side, and extending to an end portion adjacent a third said lateral wall of said waveguide which is opposed to said second wall; and
means closing said end portion of said second upper branch.
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Abstract
The hyperfrequency energy is conveyed through a waveguide (1) having a rectangular section. A central plasmagenic gas and an annular sheathing gas are supplied through a T-shaped transverse pipe (2). The upper branches of the T extend in a sealed manner through the small sides of the waveguide. The stem of the T extends with clearance through an opening (7) formed in a large side of the waveguide and is provided with a nozzle (22) which is surrounded by a sleeve (3) terminating in a rolled-over flange (25). Application in the treatment of surfaces and the production of chemical reactions.
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11 Claims
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1. A microwave plasma torch for creating a plasma jet, comprising:
- a waveguide for connection to a microwave generator, said waveguide having lateral walls and defining an opening in a first said wall and a lateral orifice in a second said wall adjacent said first wall;
a gas supply conduit in the waveguide, the gas supply conduit having a generally T-shape defining a stem, a first upper branch and a second upper branch;
said stem of said supply conduit constituting a downstream part of said supply conduit which extends through said opening with clearance and has an open outlet end and is connected to a discharge nozzle, said first upper branch extending on a first side of said stem, through said lateral orifice without clearance and being adapted to be connected to a source of said gas, and said second upper branch being in alignment with said first branch, on a second side of said stem opposite to said first side, and extending to an end portion adjacent a third said lateral wall of said waveguide which is opposed to said second wall; and
means closing said end portion of said second upper branch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a waveguide for connection to a microwave generator, said waveguide having lateral walls and defining an opening in a first said wall and a lateral orifice in a second said wall adjacent said first wall;
Specification