The utility model discloses a blast-furnace
tuyere small sleeve leakage detection device, which comprises a plurality of water return grooves fixedly arranged on a blast-furnace
tuyere platform; a first joint of the tee joint is connected with a small sleeve water outlet pipeline, a second joint is connected with a small sleeve water return
ball valve, and the small sleeve water return
ball valve is connected with a furnace bottom medium-pressure water return main
pipe; one end of the water tank is provided with a water inlet
pipe, the other end of the water tank is provided with a water outlet
pipe, the water inlet pipe is used for connecting a third connector of the tee joint, and the water outlet pipe is used for connecting a
recovery tank; and the detection device is used for detecting whether gas discharged from the gas detection port contains
carbon monoxide. The water inlet pipe is connected with the third connector of the tee joint, the water outlet pipe is connected with the water inlet in the water return groove, the water return
ball valve is closed, the
carbon monoxide detector is connected into the gas detection opening, then the small sleeve water inlet ball valve is slowly controlled, and therefore leakage detection can be rapidly conducted on the
tuyere small sleeve on line, and whether the tuyere small sleeve is damaged or not can be accurately judged.