| 摘要 |
PURPOSE:To certainly remove the deposit on the inner wall of a pipe by inserting nozzles injecting air in mutually reverse rotary directions from two circumferences of a main body wall part in the pipe and allowing the water supplied into the pipe to violently impinge against the inner wall of the pipe by jet air. CONSTITUTION:A plurality of jet orifices 15, 16 injecting air are provided on two circumferences of the wall part 12 of a nozzle main body 10 on the front and rear end sides thereof. The jet orifices 15 on the front end side are inclined in a clockwise direction R and the jet orifices 16 on the rear end side are inclined in the counterclockwise direction. When a deposit removing nozzle N is inserted in a pipe and compressed air is supplied to the nozzle main body 10, air in a rear direction and in mutually reverse rotary directions is injected to the inner wall surface of the pipe from the respective jet orifices 15, 16. At this time, since rotatory powers given to the nozzle N are negated mutually and the nozzle N is not rotated, jet force to the inner wall of the pipe becomes strong and the nozzle N is made self-propelling by the propelling force due to the injection of air in the rear direction. Therefore, the water supplied in the pipe is violently stirred by jet air to become a mist-like granular form and applied to the inner wall of the pipe over a relatively wide range. |
