Sheathed thermocouple component penetrating high-temperature high-pressure helium pressure shell

The invention discloses a sheathed thermocouple component penetrating a high-temperature high-pressure helium pressure shell, and relates to the field of reactor thermal engineering test temperature measurement. The sheathed thermocouple component comprises a penetrating part which is used forleading out and seals at least one sheathed thermocouple from the pressure shell. The penetrating part further comprises a barrel body and a sealing flange, wherein the barrel body is used for leading out at least one sheathed thermocouple from the pressure shell, the sealing flange is arranged at one end of the barrel body and is used for sealing one end of the barrel body of the penetrating part, and the sheathed thermocouple penetrates through the sealing flange. The sheathed thermocouple component is used for leading out a plurality of sheathed thermocouples from the high-temperature high-pressure helium pressure shell, is capable of basically not reducing the strength of the pressure shell and guaranteeing the air tightness, is capable of leading out an electric lead-out end from the pressure shell under the condition that a sheathed thermocouple measurement end is installed well in the pressure shell, and is convenient to detach and install. The sheathed thermocouple component penetrating the high-temperature high-pressure helium pressure shell is simple in structure, good in reliability, and high-temperature-resistant.