Iron-making blast furnace radar stock rod stable measurement system

The utility model relates to the technical field of ironmaking blast furnace auxiliary equipment, in particular to a radar stock rod stable measuring system of an ironmaking blast furnace. Comprising a radar stock rod main machine, a wave guide tube, a first purging tube, a second purging tube, a regulating valve, a protection tube and an antenna, a purging flange is fixed to the upper end of the wave guide tube, and the lower end of the wave guide tube is connected with one end of the regulating valve through a second connecting flange; the radar stock rod main machine is connected with a purging flange at the upper end of a wave guide tube through a first connecting flange, the side portion of the purging flange is connected with a first purging tube, and a second purging tube is located below the first purging tube and connected with the lower portion of the wave guide tube; a heat insulation flange is fixed to the other end of the adjusting valve, the protection pipe is connected with the heat insulation