Multi-point thermocouple based on single temperature measuring core

Abstract

The invention relates to a multi-point thermocouple based on a single temperature measuring core. The multi-point thermocouple comprises a wiring box, a protection tube, a flange and the temperature measuring core, the upper end of the protection tube is connected with the wiring box, the lower end of the protection tube is connected with the flange, the temperature measuring core is fixedly and coaxially arranged on the flange, N sets of thermocouple wires are disposed in the temperature measuring core, and N is larger than 1 and smaller than or equal to 50. The multi-point thermocouple is simple in structure, scientific and reasonable in design, large in measuring point number, convenient to install and little in workload, and saves space.

Description

technical field [0001] The invention belongs to the field of thermocouples, in particular to a multi-point thermocouple based on a single temperature measuring core. Background technique [0002] With the development of the chemical and petroleum industries, the process control of the production process is becoming more and more refined, especially the control of the temperature of the reactor used in the production process. The existing reactor temperature control needs to measure the temperature at multiple points at the same time. In the prior art, multi-point thermocouples and traditional multi-point thermocouples are often used. One is to use multiple single thermocouples, that is, one thermocouple corresponds to one temperature measurement point, and is composed of multiple thermocouples. The disadvantage of this method is that it occupies a large installation space, and at the same time increases the installation workload and the difficulty of distribution. Another ...

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Problems solved by technology

Another way is to use a thermocouple, and place multiple armored temperature measuring cores in the protective tube of the thermocouple. This method greatly saves the installation space, but because this process uses multiple armored temperature measuring cores Directly placed in the protective tube, although there is a certain improvement in space, it still cannot meet the customer's requirements. In addition, when the temperature measurement core is fixed, the traditional multiple armored temperature measurement cores protrude from the flange. Welded to the flange to ensure a tight seal

However, due to the large number of armored temperature measuring cores, small diameter, thin metal skin, high welding requirements, difficult operation, welding defects are prone to occur, resulting in safety hazards of leakage

And the components cannot be replaced, which will cause inconvenience to the installation of other parts in the equipment. In addition, the thermocouple wire in the temperature measuring core was simply drawn, and the diameter of the thermocouple wire can only reach 0.15mm, so the temperature resistance is only 400°C , which greatly restricts its use occasions, and has poor insulation and is not easy to bend

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