Soot blower construction

摘要: A soot blower of the long retracting type includes a box beam within which lance tube is longitudinally movable by means carriage suspended on rollers to travel along an integrated rack/track assembly secured inner walls beam. Such assemblies have longitudinal rails their tops for and racks bottoms rails. The are engaged underlying walking pinions journaled in positioned directly beneath rollers. In modification, combined include bottom rail surfaces addition top portions, employed another supported I-beam flanges constitute tracks, single rack being underside such flange. has set accessible spur gears at its rear wall cover, including driving gear keyed slidably shaft driven stationary motor beam, connected projects into internal drive pinions, one drivingly rotate latter as moved carriage.