Vertical gunning apparatus with television monitor

Claim 1

A remote control gunning apparatus for repairing the refractory lining of a metallurgical vessel in the vertical position at elevated temperature, said apparatus comprising in combination a rotatable vertical gunning conduit terminating at its lower extremity in a nozzle, swivel coupling means for supplying a fluidized stream of particulate refractory under pressure to said conduit, positioning means for moving said conduit horizontally and vertically to position said nozzle inside said vessel adjacent a lining area to be repaired, means for rotating said conduit to aim said refractory stream from said nozzle at said area, a television camera attached to said conduit proximate to said nozzle for televising the interior of said vessel to detect said area and to monitor the repair thereof, the axis of said camera being canted to substantially converge with the axis of said nozzle at said area, said camera being mounted in a jacket, said camera jacket being provided with a transparent heat-resistant port in the line of sight of the lens of said camera, a generally vertical elongated water inlet conduit communicating with said camera jacket and connected to a source of water for circulating water throughout the interior of said camera jacket to maintain said camera cool, an elongated water outlet conduit generally parallel to and along side of said water inlet conduit and communicating with said camera jacket for discharging heated water from said interior of said camera jacket, an electrical conduit longitudinally disposed in one of said water conduits for supplying power to said camera for transmitting a televised signal from said camera to a monitor outside said vessel, and an air conduit, a substantial portion of which is longitudinally disposed in the other of said water conduits, communicating with said port for supplying pressurized air to said port to cool and clean said port.