Novel high-temperature-resistant armored thermocouple

Abstract

The invention provides a novel high-temperature-resistant armored thermocouple comprising a casing tube and thermocouple units arranged in the inner cavity of the casing tube. The thermocouple units include positive thermocouple wires, metal blocks and negative thermocouple wires; the positive thermocouple wires are connected with the negative thermocouple wires by the metal blocks. An even numberof thermocouple units are connected in series by wires; an outer insulation sleeve is arranged outside the even number of thermocouple units; a fixation rack for fixing the metal blocks is arranged inside the outer insulation sleeve; an outer insulation layer is arranged between the casing tube and the outer insulation sleeve; and a high-temperature-resistant coating is arranged outside the casing tube. On the basis of material selection and reasonable design of the casing tube, the outer insulation layer, the outer insulation sleeve, the isolation sleeve, and the coating layer outside the casing tube, high-temperature-resistant usage of the thermocouple is realized.

Description

technical field [0001] The invention relates to the field of thermal resistance, in particular to a novel high-temperature-resistant armored thermocouple. Background technique [0002] Thermal resistance (thermal resistor) is the most commonly used temperature detector in the low temperature area. Thermal resistance temperature measurement is based on the characteristic that the resistance value of metal conductors increases with the increase of temperature for temperature measurement. Its main features are high measurement accuracy and stable performance. The temperature measurement principle of thermal resistance is based on the characteristic that the resistance value of a conductor or semiconductor changes with temperature to measure temperature and temperature-related parameters. Most thermal resistances are made of pure metal materials, platinum and copper are the most widely used at present, and materials such as nickel, manganese and rhodium have been used to manuf...

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Problems solved by technology

[0004] At present, armored thermocouples have a wide range of applications in the prior art, and there are still some deficiencies in the actual use process. For example, when applied to high temperature measurement, it is necessary to improve the high temperature resistance of armored thermocouples, and the thermocouples can also be replaced. problem, saving resources

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