Thermocouple for hot blast stove

The utility model discloses a thermocouple for a hot blast stove, which comprises a thermocouple wire. The thermocouple wire is arranged in a knob insulator serving as an insulation support, the knob insulator is arranged in an inner protecting pipe arranged in an outer protecting pipe, a sleeve is arranged on the back section of the outer protecting pipe, the back end of the sleeve is connected with the front end of a coupling pipe, and the front end of the coupling pipe is provided with a connecting flange matched with an installation seat of the thermocouple of the stove. The back end of the coupling pipe is provided with a pair of sealing flanges, two insulation sealing gaskets are arranged between the two sealing flanges, and an outgoing line of the thermocouple wire is led out from the middle of the two insulation sealing gaskets. The thermocouple for the hot blast stove can prevent high pressure hot blast from flowing out the stove, also can prevent air containing moisture from entering the inner porti