PLASMA TORCH WITH A LATERAL INJECTOR
First Claim
1. A plasma torch comprising:
- a plasma generator having;
a cathode extending along an axis X,an anode, anda chamber, the cathode and the anode being placed so as to be able to generate an electric arc in the chamber when voltage is applied between the anode and the cathode; and
an injection device for injecting a plasmagen gas, the injection device comprising an injection duct opening, along an injection axis (Ii), via an injection orifice, into the chamber;
means for injecting a material to be sprayed into a plasma flux generated by said plasma generator;
wherein,a ratio R″
between;
a radial distance (yi) of said injection orifice, defined as a minimum distance between the axis X and a center of said injection orifice; and
a largest transverse dimension (DC) of the cathode in a region of the chamber downstream of an axial position pAC, pAC denoting the axial position of minimum radial distance between the anode and cathode,is smaller than 2.5, anda projection of the injection axis (Ii) in a transverse plane passing through the center of the injection orifice of said injection duct defines an angle β
smaller than 45°
with a radius lying in said transverse plane and passing through the axis X and through the center of said injection orifice.
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Accused Products
Abstract
The invention relates to a plasma torch, comprising: a plasma generator comprising a cathode extending along an axis X and an anode (24), the cathode and the anode being arranged so as to be capable of generating, in a chamber (26), an electric arc between the anode and the cathode due to an electrical voltage, the plasma generator also comprising a plasmagen gas injection device (30) comprising an injection pipe (72) leading, along an injection axis (Ii), to an injection opening (74) in the chamber; a means for injecting a material to be discharged into a plasma flow generated by said plasma generator, the plasma torch being characterized in that: the relationship R″ between: the radial distance (yi) of said injection opening, defined as the minimum distance between the axis X and the center of said injection orifice; the largest transverse size (DC) of the cathode in the region of the chamber downstream from the position PAC, wherein PAC denotes the axial position of maximum radial mutual encroachment of the anode and the cathode, is less than 2.5; and the projection of the injection axis (Ii) into a transverse plane passing through the center of the injection orifice of said injection conduit forms an angle β less than 45° with a radius extending into said transverse plane and passing through the axis X and through the center of said injection orifice.
24 Citations
20 Claims
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1. A plasma torch comprising:
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a plasma generator having; a cathode extending along an axis X, an anode, and a chamber, the cathode and the anode being placed so as to be able to generate an electric arc in the chamber when voltage is applied between the anode and the cathode; and an injection device for injecting a plasmagen gas, the injection device comprising an injection duct opening, along an injection axis (Ii), via an injection orifice, into the chamber; means for injecting a material to be sprayed into a plasma flux generated by said plasma generator; wherein, a ratio R″
between;a radial distance (yi) of said injection orifice, defined as a minimum distance between the axis X and a center of said injection orifice; and a largest transverse dimension (DC) of the cathode in a region of the chamber downstream of an axial position pAC, pAC denoting the axial position of minimum radial distance between the anode and cathode, is smaller than 2.5, and a projection of the injection axis (Ii) in a transverse plane passing through the center of the injection orifice of said injection duct defines an angle β
smaller than 45°
with a radius lying in said transverse plane and passing through the axis X and through the center of said injection orifice. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification