| 摘要 |
PURPOSE: An injection nozzle structure of a plasma torch is provided to uniformly spray bulk powder to the inside of a plasma region by the formation of a bulk powder outlet passing through a cool water transfer pipe. CONSTITUTION: A bulk powder inlet(21) is formed on the top of an injection nozzle positioned on a closing pipe of a plasma torch electrode. A bulk powder outlet(22) is formed on the bottom of the injection nozzle positioned on the closing pipe of the plasma torch electrode The end of the bulk powder outlet is formed of an incline(23) having diameter which gradually increases outward. The bulk powder is widely sprayed on a plasma region in a spaying process. The cooling water transfer pipe of triple structure is formed on the outside of the injection nozzle. A cool water inlet(26) is formed for the inflow of the cool water. A cooling water outlet(27) discharges the cooling water.
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