| 摘要 |
<p>A soot blower of the long retracting type for cleaning the interior surfaces of a boiler, includes a traveling carriage rotatably supporting a lance tube which mounts a discharge nozzle for cleaning fluid and which is movable in an advancing and retracting direction along a horizontal path of travel, and which includes (a) horizontal drive means to advance and retract the traveling carriage along the predetermined horizontal path of travel and (b) a rotary drive means mounted on the traveling carriage for rotating the lance tube. The rotary drive means is arranged and configured so that the traveling motion of the traveling carriage during its forward and rearward movement along the path of travel imparts a driving input to the rotary drive means. Independent velocity and direction control means are associated with the rotary drive means for controlling the rotational velocity and direction of the lance tube independently of the speed and direction of travel of the traveling carriage.</p> |
