Durable high precision thermocouple

Abstract

The invention provides a durable high precision thermocouple. The durable high precision thermocouple comprises a wiring box, a first protection pipe, a second protection pipe, a third protection pipe, a fourth protection pipe, a fifth protection pipe, a fixed flange, a first electrode and a second electrode, the second protection pipe and the third protection pipe are arranged in a first protection cavity and a second protection cavity of the first protection pipe, and the fifth protection pipe is arranged in the fourth protection pipe. Double-pipe protection is adopted, when the thermocouple works in fluid, the first protection pipe and the fourth protection pipe are firstly abraded and corroded, the service cycles of the second protection pipe, the third protection pipe and the fifth protection pipe are effectively prolonged, the impact of the fluid to the first protection pipe can be effectively buffered, the gap between two first pipe bodies of the fourth protection pipe forms a channel, when the first pipe bodies work in the fluid, the fluid slowly flows through the gap of the two first pipe bodies, the fluid is prevented from being in perpendicular contact with the first pipe bodies and second pipe bodies, and the problem of corrosion or fracture which occurs under the action of the impact for a long time is avoided.

Description

technical field [0001] The invention relates to the technical field of thermocouples, in particular to a durable high-precision thermocouple. Background technique [0002] The protective tube in the traditional thermocouple will wear and corrode after long-term use, and because the fluid flow is fixed and unidirectional, the protective tube is always worn and corroded severely, causing corrosion, perforation, and corrosion of the metal protective tube. Even breakage, resulting in shortened service life of the protection tube, urgently needs to be improved. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a durable high-precision thermocouple. [0004] A durable high-precision thermocouple proposed by the present invention includes a junction box, a first protection tube, a second protection tube, a third protection tube, a fourth protection tube, a fifth protection tube, a fixing flang...

AI Technical Summary

Problems solved by technology

[0002] The protective tube in the traditional thermocouple will wear and corrode after long-term use, and because the fluid flow is fixed and unidirectional, the protective tube is always worn and corroded severely, causing corrosion, perforation, and corrosion of the metal protective tube. Even broken, resulting in a shortened service life of the protective tube, which needs to be improved urgently

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