FOREIGN MATTER REMOVING DEVICE AND METHOD

Title:

FOREIGN MATTER REMOVING DEVICE AND METHOD

Document Type and Number:

WIPO Patent Application WO/2003/013790

Kind Code:

A1

Abstract:

The invention provides a foreign matter removing device and method for easily removing foreign matter such as scale adhering to the inner surface of a pipe in a short time by a simple installation or method. It is arranged that a holder (11) is mounted on the end of a pipe (P) and a grinding auxiliary member (16) fixed to the front end of a support arm (15) is inserted into the pipe (P) by using the holder (11), until it stops in a region (A) where oxide scale (S) forms in large amounts, and that abrasives are fed under pressure into the pipe (P) by a blast device (14), thereby increasing the flow rate of abrasives in the scale grinding region (A) to achieve reliable grinding and removal of the oxide scale (S). Further, as the need arises, a spiral groove (17) is formed in the outer periphery of the grinding auxiliary member (16) to produce a rotational flow, increasing the centrifugal force on the abrasives.

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Inventors:

SHIRAISHI TADASHI (JP)
YOSHIDA MASATOSHI (JP)
KUMADA KAZUNORI (JP)
NAKAGAWA KEITA (JP)
MATSUBAYASHI MAKOTO (JP)
MATSUDA MITSUHIRO (JP)

Application Number:

PCT/JP2002/008061

Publication Date:

February 20, 2003

Filing Date:

August 07, 2002

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)
SHIRAISHI TADASHI (JP)
YOSHIDA MASATOSHI (JP)
KUMADA KAZUNORI (JP)
NAKAGAWA KEITA (JP)
MATSUBAYASHI MAKOTO (JP)
MATSUDA MITSUHIRO (JP)

International Classes:

B08B9/04; B24C3/32; F28G1/16; (IPC1-7): B24C3/32

Foreign References:

JPS57187596A	1982-11-18
JPH07276232A	1995-10-24
JPH06270065A	1994-09-27

Other References: