Patent ID: 7331846
Filing Date: 2008-02-19
Classification: B24C

Abstract:
1. A blasting apparatus for an outer surface of a pipe which ejects a blast material to an outer side of a pipe and grinds the outer surface comprising: a guide member which is provided along a longitudinal direction of the outer surface of the pipe, and guides the blast head along the longitudinal direction of the outer surface of the pipe; a ring member formed of at least two connected half-split members and having an inside diameter that is larger than an outside diameter of the pipe, and which is disposed to have the pipe inserted through the ring member, holds the guide member, and guides the blast head in a circumferential direction of the outer surface of the pipe by turning in the circumferential direction on the outer surface of the pipe; and a blast heat containing a suction port which sucks in a blast material for use in grinding and dust particles, and a nozzle which ejects the blast material, wherein the blast head is mounted for movement in longitudinal and circumferential directions of the pipe.