Foreign matter removing device and method

摘要

The present invention is one for providing an apparatus and a method which make it possible to remove a foreign object or matter such as scale attached on an inner surface of a pipe easily for a short period of time by means of simple equipment and manner, and constituted as follows. Specifically, a holder ( 11 ) is attached onto an end of a pipe (P), an abrasion assisting member ( 16 ) fixed to a tip end of a support arm ( 15 ) is inserted into the pipe (P) by use of the holder ( 11 ) and stopped at an area (A) where oxide scale (S) is generated in a large amount. Then abrasive is sent with pressure into the pipe (P) by a blast device ( 14 ), and thus a flow rate of the abrasive in the scale-abraded area (A) is increased to abrade and remove the oxide scale (S) securely. Moreover, if required, a spiral groove ( 17 ) is formed on an outer circumference of the abrasion assisting member ( 16 ) to increase centrifugal force of the abrasive.