IN-FURNACE TEMPERATURE MEASUREMENT DEVICE

摘要

The present invention relates to an in-furnace temperature measurement device (1) for a furnace where gas is generated in the interior thereof. The measurement device (1) is provided with: a support tubing (3) that communicates with a measurement hole (2A) leading to the inside of a furnace; a sensor-protecting tubing (4) that is inserted into the support tubing (3) so as to be able to move in the axial direction, with the distal end of the sensor-protecting tubing facing the furnace side; a plurality of sealing rings (6A, 6B) for hermetically sealing a gap between the support tubing (3) and the sensor-protecting tubing (4), the sealing rings being arranged at an interval so as to divide the gap in the axial direction into a plurality of space portions; a temperature sensor (5) housed in the interior of the protective tubing (4) so that a temperature-sensitive portion will correspond to the distal end part of the sensor-protecting tubing (4); and a drive mechanism (7) for driving the distal end part of the sensor-protecting tubing (4) so that the distal end part in the measurement hole (2A) can freely enter into and retract from the inside of the furnace in the axial direction, while also maintaining the sealed state effectuated by the sealing rings (6A, 6B).