Blackbody cavity sensor capable of continuously measuring temperature

Abstract

The invention relates to the field of temperature detection equipment, and discloses a blackbody cavity sensor capable of continuously measuring the temperature. The sensor comprises a sensor body, and a sensor comprises an outer pipe and an inner pipe; an air inlet pipe communicated with the inner pipe is arranged at the top end of the outer pipe; the inner pipe is sleeved with a barrel; a cyclone channel is arranged between the cylinder body and the inner pipe; the cyclone channel comprises a first channel and a second channel which spirally extend along the axial direction of the inner pipe; the first channel is communicated with the second channel; the cyclone channel is communicated with the inner pipe; a cylinder body is arranged outside an inner pipe in a sleeving manner; a cyclonechannel is arranged between the cylinder body and the inner pipe, and high-speed airflow is injected into the cyclone channel, so the pressure intensity in the cyclone channel is reduced, air in the inner pipe moves into the cyclone channel and is exhausted under the action of the pressure difference between the cyclone channel and the inner pipe, the influence of smoke on a temperature measurement light path is reduced, and the temperature measurement effect is improved.

Description

technical field [0001] The invention relates to the technical field of temperature detection equipment, in particular to a blackbody cavity sensor for continuous temperature measurement. Background technique [0002] The blackbody cavity sensor in the prior art is mainly composed of an outer tube, an inner tube, a connecting tube and a metal protective sleeve. When the sensor is inserted into molten steel, the material of the protective sleeve has certain heat capacity, thermal conductivity and other factors and temperature The inherent thermal inertia of the original itself leads to slow response speed and poor dynamic characteristics of the sensor. Under high temperature conditions, the inner tube made of corundum material will undergo high temperature creep. During the process of sensor insertion and removal, the temperature will change drastically and thermal shock will occur. These will cause the stress concentration of the corundum tube and cause the corundum tube to b...

AI Technical Summary

Problems solved by technology

[0002] The blackbody cavity sensor in the prior art is mainly composed of an outer tube, an inner tube, a connecting tube and a metal protective sleeve. When the sensor is inserted into molten steel, the material of the protective sleeve has certain heat capacity, thermal conductivity and other factors and temperature The inherent thermal inertia of the original itself leads to slow response speed and poor dynamic characteristics of the sensor

Under high temperature conditions, the inner tube made of corundum material will undergo high temperature creep. During the process of sensor insertion and removal, the temperature will change drastically and thermal shock will occur. These will cause the stress concentration of the corundum tube and cause the corundum tube to break, which will seriously affect the life of the sensor.

In order to solve the above problems, the corundum tube closed at the bottom was cut off, and the length was appropriately reduced. However, due to the opening of the corundum tube, the flue gas entered the temperature measurement optical path. It does not affect the temperature measurement, but when the temperature is 1275°C, smoke particles that affect the temperature measurement will be formed, blocking the temperature measurement optical path and affecting the stability of the temperature measurement

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