FBG temperature monitoring device for quenching heat exchanger in pre-stressed elongation

Abstract

The invention discloses an FBG temperature monitoring device for a quenching heat exchanger in pre-stressed elongation. The device comprises a temperature optical fiber grating body and an optical fiber grating input pipe, wherein the middle of the left end surface of the temperature optical fiber grating body is provided with the optical fiber grating input pipe; the optical fiber grating input pipe is connected to the left end surface of the temperature optical fiber grating body through integral forming; an optical fiber grating input wire is arranged in the optical fiber grating input pipe; the right end of the optical fiber grating input wire is connected to the center of the left end surface of the temperature optical fiber grating body; and the right end of the optical fiber gratinginput wire penetrates from the center of the left end surface of the temperature optical fiber grating body to the interior of the temperature optical fiber grating body. Manual re-calibration is required at time intervals when a traditional electromagnetic sensor is used, an optical fiber sensor does not need to be subjected to secondary calibration after leaving the factory, the reusability isstrong, a warrior photoelectric state is isolated, and use is safer.

Description

technical field [0001] The invention belongs to the related technical field of petrochemical equipment, and in particular relates to a FBG temperature monitoring device for prestressed elongation of a quenching heat exchanger. Background technique [0002] When the quenching heat exchanger is prestressed and elongated, local heating or flame gun heating, real-time online monitoring of the temperature during the heating process can ensure the accuracy of the prestressed elongation. At present, some manufacturers realize this function by arranging traditional temperature sensors. [0003] The existing temperature monitoring device technology has the following problems: the sensing sensitivity of the current sensing technology is not high, and it cannot work normally in many special environments such as high voltage, large noise, high temperature, strong corrosion, etc., and the sensitivity is relatively low , Weak anti-electromagnetic interference ability, corrosion resistance...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a FBG temperature monitoring device with prestressed elongation of the quenching heat exchanger to solve the problem that the sensing sensitivity of the current sensing technology proposed in the above background technology is not high, and it cannot be used under high voltage and large noise. , high temperature, strong corrosiveness and many other special environments to work normally, and the sensitivity is relatively low, the ability to resist electromagnetic interference is weak, corrosion resistance, high temperature and high pressure resistance, electrical insulation is general, and the problem that it cannot be directly connected to the computer

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