Device for measuring temperature of hot-rolled strip steel

Abstract

The invention discloses a device used for measuring the temperature of a hot rolling strip steel, comprising a measuring chamber, a nozzle and a non-contact temperature measuring sensor element; air inlets of the nozzle are arranged in the tangential direction of the circumference; the nozzle is arranged at the lower part of the measuring chamber; the lug boss of the nozzle and a clapboard which is arranged on the top of the nozzle form a sliding match with the measuring chamber; an air inlet of the measuring chamber is arranged between the lug boss of the nozzle and the clapboard which is arranged on the top of the nozzle; the measuring chamber which is arranged on the upper surface of the clapboard which is arranged on the top of the nozzle is internally provided with the non-contact temperature measuring sensor element; airflow in the air inlet of the measuring chamber is rotatablely jetted from the lower part of the nozzle through the air inlets of the nozzle which are arranged in the tangential direction to the surface of the hot rolling strip steel and blows away the cooling water and mirage on the surface of the hot rolling strip steel; the nozzle is suspended on the surface of the hot rolling strip steel under the action of the self-stability fluid force and gravity; the non-contact temperature measuring sensor element measures the temperature of the surface of the hot rolling strip steel below the clapboard which is arranged on the top of the nozzle. The device used for measuring the temperature of the hot rolling strip steel has the advantages of simple structure, good manufacturability, simple operation, etc., and eliminates the interference of the cooling water and the mirage on the non-contact temperature measurement.

Description

technical field [0001] The invention relates to a temperature measuring device, in particular to a temperature measuring device for hot-rolled strip steel. Background technique [0002] Accurate measurement of the surface temperature of the hot-rolled strip is the prerequisite for precise control of the temperature of the hot-rolled strip. At present, infrared pyrometers are mainly used for non-contact measurement of the surface temperature of the strip. When the surface of the strip is disturbed by cooling water, fog, etc. , its measurement accuracy is difficult to guarantee. [0003] To eliminate the influence of cooling water and mist at the temperature measurement point, high-speed jet gas can be used to blow away the cooling water and mist covering the surface of the strip. Since the kinetic energy of the injected gas attenuates sharply with the injection distance, the distance between the gas nozzle and the strip cannot be too large, but the shape fluctuation and vibr...

AI Technical Summary

Problems solved by technology

Since the gas is ejected vertically from the bottom of the nozzle, the lower air flow is easily disturbed, and the drainage capacity of the gas is poor

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