Special type WRe temperature sensor

Abstract

A special WRe temperature sensor apply to temperature measuring region, composed by junction box, gripping tube, plumbago outer protecting tube, corundum inner tube, corundum insulating tube, antioxidant, hydride function stuff, stuffing, and tungsten- rhenium thermocouple. The structure: outer layer is special plumbago protecting tube; inner layer is alundum tube multiunit tube type oxidation protection WRe thermocouple. The invention can take temperature measurement under below 1600 degree, alcali molten erode and reducing atmosphere. fill antioxidant, hydride function stuff, stuffing into around of tungsten- rhenium thermocouple wire in corundum insulating tube inside of alundum tube inside; adopt stuffing at high temperatures release hydrogen gas on tungsten- rhenium thermocouple wiresurface and powder particle interstice, and adopt organic- inorganic binder pressurize exactly, isolate contact between environment and tube insides, thereby to make thermometric condition for tungsten- rhenium thermocouple working.

Description

Technical field: [0001] The invention belongs to a special WRe temperature sensor used for process industry control detection. Background technique: [0002] At present, temperature measurement technology in the field of measurement and testing at home and abroad is becoming more and more important, because temperature is one of the important parameters of industrial process control, and the accuracy of temperature measurement directly affects product quality, energy consumption and equipment life. WRe in the WRe temperature sensor is the English abbreviation of metal tungsten and rhenium. Most of the high-temperature industrial furnaces in my country use S, R, B and other precious metal thermocouples for temperature measurement above 1300 ℃. my country is a country with extremely scarce platinum group resources, and almost all platinum used for temperature measurement depends on imports. At the same time, my country is a big country of W storage, mining and smelting, and the pr...

AI Technical Summary

Problems solved by technology

[0003] WRe thermocouples cannot be used in an oxidizing atmosphere, and are only suitable for use in a reducing atmosphere or an inert atmosphere. However, most industrial furnaces are in an oxidizing atmosphere. Even in a reducing atmosphere or an inert atmosphere, the thermocouple protects the air in the tube. Oxygen in the medium will also oxidize the WRe thermocouple, but it is very rare to measure the temperature with bare WRe wire in a reducing atmosphere or an inert atmosphere.

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