Measuring device and method for measuring thermal response performance of sheathed thermocouple

The invention relates to the technical field of thermocouple testing equipment, in particular to a measuring device and method for measuring the thermal response performance of an armored thermocouple. A movable rotating cylinder is rotationally connected to the middle of a measuring cylinder, an insertion hole for inserting the armored thermocouple is formed in a heat preservation cavity, and the movable rotating cylinder rotates to a ventilation area through one side of a notch of the movable rotating cylinder; the outer wall of the heat preservation cavity rotates along the inner wall of the movable rotary drum until the heat preservation cavity rotates to one side of the notch, the working end of the armored thermocouple penetrates out of the through hole for temperature measurement, and after temperature measurement, the heat preservation cavity rotates into the movable rotary drum until the heat preservation cavity rotates to one side of the adjacent ventilation area, and the working end retracts into t