Shot balls spraying device for shot cleaning, shot balls spraying methods and boiler

摘要

PROBLEM TO BE SOLVED: To provide a shot ball scattering device, which is constituted by branching a shot ball conveyance path into a plurality and arranging a channel selector valve at a branch point, and includes the channel selector valve capable of suppressing the occurrence of an operation defect due to a collision of a shot ball.;SOLUTION: A channel selector valve includes: a casing in a short columnar shape; a supply port and a plurality of discharge ports each formed on an outer peripheral surface of the casing and having tube ends extending inward compared to an inner peripheral surface of the casing; and a valve body which links a discharge port selected out of the plurality of discharge ports to the supply port while interposing a gap between the tube ends of the supply port and discharge ports, and can rotate around a longitudinal axis of rotation of the casing.;COPYRIGHT: (C)2014,JPO&INPIT