PIPE LINE TREATING DEVICE

摘要

PROBLEM TO BE SOLVED: To clean a piping system rapidly, effectively and inexpensively. SOLUTION: A piping system treatment apparatus used for cleaning the outside of a piping system 812 by high pressure air containing a grinding material has an improved classifying and separating machine unit separating the coarse particles of the grinding material from relatively light broken pieces. In the classifying and separating machine unit provided in a manifold duct 856, the coarse particles of the grinding material are returned to a collecting tray-shaped part 840 for the purpose of recovery and dust suspended in air is removed through a duct 858. A series of pressure escape filters lower the air pressure in a spraying chamber to prevent broken pieces from passing through triple seals 876, 878, 880 from the spraying chamber to escape. A spraying nozzle assembly 834 is attached to a nozzle vibrating frame by a snap attaching jig not using screw connection contaminated by broken pieces.