Mechanism for rotating and reciprocating a soot blower

Claim 1

A structure for inserting a fluid lance within a furnace and delivering fluid onto the internal wall of the furnace to remove foreign matter from the wall, including, a furnace wall with an opening which provides access to the internal side of the wall from external the wall of the furnace, an elongated frame mounted by one end over the wall opening and extending normal the plane of the wall, a lance in the form of an elongated conduit mounted within the frame and provided a range of axial movement wherein it reciprocates from which range the lance extends one of its ends into the furance interior through the opening, a nozzle mounted on the first end of the lance which is inserted into the furnace interior from which cleaning fluid is injected into the interior of the furnace and onto the interior wall to remove foreign matter accumulated thereon, a feed tube extended into the second end of the lance within the frame to conduct cleaning fluid into the lance so it will exit through the nozzle on the first end of the lance, a valve in the feed tube to control the flow of cleaning fluid in the feed tube, a motive means mounted in stationary relationship to the frame, a linkage means between the motive means and the lance to rotate the lance by the motive means, a section of the frame containing spiral grooves about the lance, an extension structure mounted on the lance and extended into engagement with the spiral grooves which arrangement causes reciprocation of the connected lance over its range when the lance is rotated by the motive means, and actuating linkage connected to the fluid valve and extended to the forward end of the range of lance reciprocation in the arrangement whereby the lance contacts the linkage and actuates the valve to flow steam through the feed tube and into the lance when the nozzle of the lance is positioned within the furnace interior.

Claim 3

An apparatus for dislodging soot and slag and other particulate residue from the internal surfaces of furnaces, including; a lance for cleaning fluid under pressure, including, (a) a first conduit section with a first end to be moved into an opening of the furnace wall, (b) a second conduit section connected as an extension of the first conduit section and provided with an extension to engage structure spaced radially from the lance, and (c) a feed tube sized to telescope into the second end of the grooved conduit section for conducting high pressure cleaning fluid into the other conduit sections of the lance; a framework attached to the external side of the furnace wall adapted and arranged to support the lance in order for the first conduit section to be inserted through the opening in the furnace wall; a source of pressure fluid; a conduit connected between the source of pressure fluid and the feed tube including a valve for controlling the flow of fluid from the source of the feed tube; a motive means mounted stationary relative to the framework and near enough to be linked to the first conduit section of the lance; a spiral grooved structure mounted on the framework and spaced radially from the lance in order for its grooves to be engaged by the extension mounted on the second conduit section of the lance; and linkage between the valve and the lance positioned and arranged to be actuated when the rotating and reciprocating lance reaches its advanced position; whereby the motive means is controlled to rotate the lance and thereby reciprocate the lance with the lance actuating the valve when the lance has reached its extreme point of travel into the furnace.

Claim 4

An apparatus for dislodging soot and slag and other particulate residue from the internal surfaces of furnaces, including; a lance for cleaning fluid under pressure, including, (a) a first conduit section with a first end to be moved into an opening of the furnace wall, (b) a second conduit section connected as an extension of the first conduit section and provided with an extension to engage structure spaced radially from the lance, and (c) a feed tube sized to telescope into the second end of the grooved conduit section for conducting high pressure cleaning fluid into the other conduit sections of the lance; a framework attached to the external side of the furnace wall adapted and arranged to support the lance in order for the first conduit section to be inserted through the opening in the furnace wall; a source of pressure fluid; a conduit connected between the source of pressure fluid and the feed tube including a valve for controlling the flow of fluid from the source of the feed tube; a motive means mounted stationary relative to the framework and near enough to be linked to the first conduit section of the lance; a spiral grooved structure mounted on the framework and spaced radially from the lance in order for its grooves to be engaged by the extension mounted on the second conduit section of the lance; and linkage between the valve and the lance positioned and arranged to be actuated when the rotating and reciprocating lance reaches its advanced position; whereby the motive means is controlled to rotate the lance and thereby reciprocate the lance with the lance actuating the valve when the lance has reached its extreme point of travel into the furnace.