Plasma generator for powder spheroidizing or fine coating

The invention relates to a thermal plasma technology, in particular to a plasma generator for powder spheroidizing or fine coating. The generator comprises a cathode assembly, an insulating sleeve and an anode assembly; the cathode assembly comprises a red copper seat, a cathode head and a cathode cooling sleeve, and the anode assembly comprises an anode and an anode cooling sleeve which are coaxially mounted. A spherical tungsten rod serves as a cathode head and is embedded in a red copper seat, electrode ablation is relieved, the service life of an electrode is prolonged, an anode is of a 2-5 mm hollow red copper structure, and working gas is converged in a channel between the cathode head and the anode to form high-speed plasma jet flow after forming higher atmospheric pressure and passing through an anode channel. The diameter of the plasma jet beam generated by the device ranges from 2 mm to 5 mm, energy is more concentrated, the jet speed is higher, powder can better absorb heat to be melted, and the sp