| 摘要 |
PURPOSE:To remove contaminations by connecting a vacuum pump and a vacuum tank by a high-pressure hose and providing an auxiliary means to the high-pressure hose. CONSTITUTION:An injection nozzle 21 is inserted into a pipe 24 from one end port of the pipe and high-pressure water is supplied to a flexible hose 20 at the time of washing the inside surface of the pipe 24 with an in-pipe washing machine. The high-pressure water is supplied to the injection nozzle 21 and is injected vigorously from injection holes 23 to the inside surface of the pipe to impart impact thereto. Rust 25, contaminants, algae, etc., are exfoliated therefrom. The injection nozzle 23 is simultaneously subjected to propulsion and rotation by the reaction force of the injected water and is progressed on the inside surface of the pipe while dragging the flexible hose 20, by which the entire inside surface of the pipe is washed. The contaminations on the inside surface of the pipe are rapidly and surely removed in this way. |
