| 摘要 |
<p>The disclosure is directed to a soot blower of the long retracting type. In accordance with the invention, a novel cable drive system is provided to impart a traverse motion to the lance tube of the soot blower. The cable drive system comprises a rotatable, cable-supporting drum, a first cable including one end fastened to the drum and extending from the drum to an operative connection with the traveling carriage supporting the soot blower lance tube and a second cable including an end fastened to the drum and extending from the drum to an operative connection with the traveling carriage on a side thereof opposite to the side which is connected to the first cable. The drum is selectively rotatable in a clockwise or counterclockwise direction and rotation of the drum is operative to move the traveling carriage in an advancing or retracting direction along a predetermined path of travel. Pursuant to a significant feature of the invention, the rotatable drum is positioned at a location midway between the forwardmost and rearwardmost ends of the predetermined path of travel. The soot blower of the invention also includes an automatic cable guide system to guide the drive cables onto and off of the drum, a revolving roller assembly to support and guide the lance tube during its working motion along the predetermined path of travel and a novel valve and valve actuator operable to provide a cleaning fluid flow to the lance tube at appropriate times during its working motion.</p> |
