High-precision thermocouple

Abstract

A high-precision thermocouple provided by the present invention comprises a junction box, a first thermocouple, a second thermocouple and a third thermocouple. The first thermocouple comprises a first protection tube, a first casing pipe, a first conductor, a second conductor, a first binding post and a second binding post, the second thermocouple comprises a second protection tube, a second casing pipe, a third conductor, a fourth conductor, a third binding post and a fourth binding post, the third thermocouple comprises a third protection tube, a third casing pipe, a fifth conductor, a sixth conductor, a fifth binding post and a sixth binding post, and the first, second and third protection tubes have different lengths. According to the present invention, the temperatures of different temperature measurement points in a same temperature measurement space can be measured, and the lengths of the first, second and third thermocouples all can be adjusted, so that the high-precision thermocouple is adaptive to different temperature measurement places, and is simple in structure, accurate in temperature measurement and diverse in function.

Description

technical field [0001] The invention relates to the technical field of thermocouples, in particular to a high-precision thermocouple. Background technique [0002] In important industrial production processes such as petroleum, chemical industry, metallurgy, and electric power, measuring temperature with thermocouples is the most widely used method. Its main features are wide measurement range, relatively stable performance, simple structure, good dynamic response, and long-distance Transmission of electrical signals facilitates the realization of automatic control and centralized control. Thermocouples have the advantages of bending, high pressure resistance, fast thermal response time and fastening and durability. They can be used to directly measure the temperature of liquid, steam and gas media and solid surfaces in the range of 0-1000 °C in various production processes. temperature. In the prior art, a thermocouple with an appropriate length is usually selected accord...

AI Technical Summary

Problems solved by technology

In the prior art, a thermocouple with an appropriate length is usually selected according to the condition of the temperature measurement space and the position of the temperature measurement point. When there are multiple temperature measurement points in the same temperature measurement space, it is often necessary to add multiple thermocouples for measurement. temperature or during the temperature measurement process to replace the thermocouple, the operation is inconvenient and needs to be improved

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