| 摘要 |
PURPOSE:To surely remove dust in a pipe by blowing air to the rear side of a body for blowing air on the inner surface of the pipe in the traveling direction, moving a dust collector behind the body along with the body and surely collecting the dust blown off by the air from the body. CONSTITUTION:The body 2 for blowing air on the inner surface of a pipe is dragged and moved in a pipe P, and the dust in the pipe P is blown off by the air from the body 2 and removed. In this case, air is blown to the rear side of the body 2 in its traveling direction, a dust collector 7 is moved behind the body 2 along with the body 2, and the dust blown off by the air from the body 2 is collected by the collector 7. A return air passage 2h for returning air from the rear to front sides is formed in the body 2, the dust-contg. air is reversed in the collector 7 and introduced into the passage 2h. Consequently, the dust blown off by the body 2 is surely collected, and the dust in the pipe is surely removed. |
