In-furnace temperature measurement device

摘要

The present invention relates to an in-furnace temperature measurement device 1 for a furnace in which gas is generated. The measurement device 1 includes: a support tube 3 which communicates with a measurement hole 2A which leads to an inside of the furnace; a sensor protection tube 4 inserted into the support tube 3 so as to be movable in an axial direction with a leading end, of the sensor protection tube 4, facing a furnace side; a plurality of seal rings 6A and 6B which hermetically seal a gap between the support tube 3 and the sensor protection tube 4 and which are arranged at an interval so as to divide the gap into a plurality of space portions in the axial direction; a temperature sensor 5 housed in the sensor protection tube 4 such that a temperature-sensing portion of the temperature sensor 5 corresponds to a leading-end portion of the sensor protection tube 4; and a drive mechanism 7 which drives the leading-end portion of the sensor protection tube 4 so as to be able to advance and retract in the axial direction with respect to the inside of the furnace through the measurement hole 2A, while maintaining a sealed state by the seal rings 6A and 6B.

主权项

1. An in-furnace temperature measurement device for a furnace in which gas is generated, the in-furnace temperature measurement device comprising:
a support tube which communicates with a measurement hole which leads to an inside of the furnace; a sensor protection tube inserted into the support tube so as to be movable in an axial direction with a leading end, of the sensor protection tube, facing a furnace side; a plurality of seal rings which hermetically seal a gap between the support tube and the sensor protection tube and which are arranged at an interval so as to divide the gap into a plurality of space portions in the axial direction; a temperature sensor housed in the sensor protection tube such that a temperature-sensing portion of the temperature sensor corresponds to a leading-end portion of the sensor protection tube; a drive mechanism which drives the leading-end portion of the sensor protection tube so as to be able to advance and retract in the axial direction with respect to the inside of the furnace through the measurement hole, while maintaining a sealed state by the seal rings; and a gas flowing mechanism which causes inert gas having a higher pressure than an in-furnace pressure to flow into each of the space portions which are positioned on the furnace side of the respective seal rings.