| 摘要 |
PROBLEM TO BE SOLVED: To provide a jet gun for wet blast capable of suppressing opening of a hole on a gun body containing a slurry inflow chamber.SOLUTION: A jet gun 10 includes a gun body 11, an air jet member 12, and a nozzle unit 13. A slurry inflow chamber 20 is formed at the gun body 11. The air jet member 12 includes an air jet holes 53 and an air distribution part 55 which communicates with the air jet hole 53. The nozzle unit 13 includes a nozzle member 14 made from ultrahard metal. The nozzle member 14 includes a flange part 70 and a tube part 71. At the tube part 71, a jet distribution part 72 and a slurry projection opening 82 communicating with the jet distribution 72 are formed. On a first surface 70a of the flange part 70, a recess 75 having a rising wall 76 continuous in circumferential direction is formed. At the center of a bottom surface 75a of the recess, a slurry guide hole 80 is formed. The flange part 70 is fastened to the gun body 11 by a fastening mechanism 15 including clamp members 91, 92 and bolts 93, 94. |
