| 摘要 |
PURPOSE:To easily wash the inside of small-diameter pipings and intricate pipings by loosely fitting a cylindrical turning body capable of forming a water film to serve as a fluid bearing into the bearing part of a nozzle bearing body which is mounted with a hose on its rear end side and has a main flow passage in an axial central direction. CONSTITUTION:This piping washing device X has the nozzle bearing body 1 to be supplied with washing water of a prescribed pressure via a hose 7 and is made to travel by itself by a jet (a) formed by injection of washing water from a first self-traveling injection hole 13 and a jet (b) which is injected from a second injection hole 19 for self-traveling through a liquid pool 18 formed to the turning body 15 loosely fitted into the bearing part 10 of the nozzle supporting body 1. The washing water in the main flow passage 2 flows also into the spacing between the bearing part 10 and the turning body 15 and forms the water film 17 having the bearing function. A guide part 20 is pushed to the inside wall of the piping by the reaction force of the jet (c) injected from the injection hole 16 for unbalance force; in addition, the device X is turned at a high speed along the inner peripheral wall of the piping, by which the deposits on the inside all of the piping are removed. |
