| 摘要 |
The present invention relates to the structure of a plasma torch electrode for manufacturing nanopowder comprising: a carrier gas inlet supplying bulk powder to the plasma area, an injection pipe injecting the carrier gas into the plasma torch, a confinement pipe into which the injection pipe is inserted, a plasma gas induction pipe disposed between the injection pipe and the confinement pipe to distribute the plasma gas, an injection pipe coolant entrance and an injection pipe coolant exit disposed at each of the upper and lower ends of the side surface as dual inner pipes to cool the plasma heat, a pair of plasma gas inlets supplying the plasma gas for the jet in the confinement pipe, a pair of sheath gas inlets supplying a sheath gas for the jet between the confinement pipe and the plasma gas induction pipe, an support pipe for an induction coil disposed separately at the outer circumferential surface of the confinement pipe, an induction coil wound around the outer circumferential surface of the support pipe for plasma generation in the confinement pipe, and a confinement pipe coolant entrance and a confinement pipe coolant exit lowering the temperature of the confinement pipe. According to the present invention, the structure of the plasma gas induction pipe is improved for even distribution of the plasma gas so that the plasma generation in the confinement pipe is even, and the structure of the sheath gas jet is improved so as to prevent the confinement pipe from being damaged by the plasma heat generated in the confinement pipe and to increase the cooling efficiency of the confinement pipe. |
