| 摘要 |
PROBLEM TO BE SOLVED: To perform efficient work facilitating long term continuous execution, mass execution by attaching a cylindrical pipe having a larger diameter than that of a fluidized material discharge port to the tip of a nozzle to decrease the rebound of the fluidized material in the spray nozzle, in which compressed air and the fluidized material each forcibly sent from a separated passage are joined to each other. SOLUTION: The spray nozzle is a tubular body and is constituted of a fluidized material forcibly sending pipe 1, a compressed air forcibly sending pipe 2 and the cylindrical pipe 3. The fluidized material jetted by the compressed air from a discharge port composed of the fluidized material forcibly sending pipe 1 of an outside pipe and the compress air forcibly sending pipe 2 of an inside pipe is sprayed through the cylindrical pipe 3. The diameter C of the cylindrical pipe 3 is fixed by the diameter (b) of the fluidized material discharge port, the discharged quantity of the fluidized material or the like and is preferably 1.5-2.5 times of the diameter (b) of the fluidized material discharge port and an angleθbetween a line for connecting from the outer periphery of the fluidized material discharge port to the outer periphery of the tip of the cylindrical pipe 3 and the center axis of the discharge port is preferably about 20-45 deg..
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