Multi-branch multi-point thermocouple with sealed cavity

Abstract

The invention relates to a multi-branch multi-point thermocouple with a sealed cavity. The multi-branch multi-point thermocouple comprises a junction box, a protective tube, a flange and a temperature measuring core, wherein the upper end of the protective tube is connected with the junction box, the lower end of the protective tube is connected with the flange, the temperature measuring core is fixedly installed on the flange, the sealed cavity is arranged in the protective tube, the sealed cavity is communicated with a pressure detection device, N sets of thermocouple wires are installed in the temperature measuring core, and the N is larger than one and no smaller than five. The multi-branch multi-point thermocouple with the sealed cavity is simple in structure, scientific and reasonable in design, large in number of measured points, convenient to install and low in workload, and saves space.

Description

technical field [0001] The invention belongs to the field of thermocouples, in particular to a multi-branch and multi-point thermocouple with a sealed cavity. 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 way is ...

AI Technical Summary

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, the diameter of the thermocouple wire can only reach 0.15mm, so the temperature resistance is only 400 ° C, which greatly limits its application occasions, and the insulation is poor. , not easy to bend

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