The utility model relates to the technical field of graphitization
furnace temperature monitoring, in particular to a high and low temperature measuring mechanism of a vertical graphitization furnace, which comprises a mounting mechanism, a temperature measuring unit and a limiting unit. The installation mechanism drives a screw-sliding block
assembly through a stepping motor, and drives the temperature measuring unit to move back and forth along a guide rail. The temperature measuring unit comprises a low-temperature
infrared thermometer and a high-temperature
infrared thermometer which are fixed on the two sides of the sliding block through equilateral triangle bolt adjusting structures respectively, so that high-precision alignment with the temperature measuring port is realized; the limiting unit is linked with the sensor through the trigger plate and controls the position of the sliding block so as to switch the
temperature measurement mode. When the
furnace temperature is lower than 1100 DEG C, the low-temperature
thermometer works; and when the
voltage is higher than the threshold value, the stepping motor is driven and switched to the high-temperature thermodetector, and the
response time is less than or equal to 1 second. According to the utility model, the non-contact
infrared temperature measurement technology is adopted, the problem of dynamic sealing failure of a traditional
thermocouple is solved, and the
temperature measurement efficiency, accuracy and process stability are remarkably improved by combining
automatic control and high-precision limiting design.