| 摘要 |
PROBLEM TO BE SOLVED: To obtain the device capable of efficiently and surely cleaning the inner wall of an especially large-diameter pipe and capable of being used for the straight pipe and bent pipe. SOLUTION: At least three expansion legs 33 are radially provided around a central member 12 to form one set, another set is formed, and the two sets are connected with a flexible member. A flexible hihg-pressure hose 27 is inserted into the through-hole 26 of the central member 12, and a nozzle main body 29 is attached to the tip of the hose 27 to constitute the device for cleaning the inside of a pipe. The heights of the legs 33 are adjusted by setting the device to the inner diameter of a pipe 10 to be cleaned. The device is moved in the pipe 10, and a cleaning soln. 36 is jetted against the inner wall of the pipe 10 to wash off sludge 11. The leg 33 tends to return to the normal state at all times even if the leg 33 is inclined, the main body 29 is held almost at the central position in the pipe 10, and the device can be used for the straight pipe and bent pipe. |
