Industrial valve body stress measuring device and method

Abstract

The invention discloses an industrial valve body stress measuring device and method; the device comprises a computer, a fiber Bragg grating demodulator, a calibration system and a measuring system; the calibration system comprises a fixed pulley, a tray, a weight and a calibration fiber Bragg grating sensor; the measuring system comprises a valve body and an application optical fiber Bragg gratingsensor, and a measuring sensor module is fixed to the outer wall of the valve body and used for converting the strain of the valve body into a wavelength signal. According to the invention, the strain of different positions of the valve body can be accurately measured; through the device and a measuring method provided by the invention, accurate and reliable stress of each position of the valve body can be obtained; therefore, the stress-strain state of the valve body is monitored on line in real time for a long time, the problems that an existing resistance strain measurement method is inaccurate in measurement and cannot measure a complex structure are solved, the defects in the field of valve body stress measurement in China are overcome, and the device and method have important significance in long-term reliable operation and industrial safety production of industrial valves.

Description

technical field [0001] The invention belongs to the field of industrial valve design, and in particular relates to an industrial valve body stress measuring device and a method thereof. Background technique [0002] As an important part of major high-end technical equipment, industrial valves play a key role in petrochemical, electric power, machinery, metallurgy, light industry, chemical and other industrial fields. Especially for key valves used in major engineering fields, such as high-temperature and high-pressure valves such as thermal power supercritical and ultra-supercritical parameters, low-temperature valves such as valves for LNG receiving stations, and wear-resistant and corrosion-resistant valves such as valves for coal chemical industry. Once the valve has accidents such as valve body cracking, it will cause heavy property losses and casualties. Carrying out online safety monitoring is to evaluate the safety and reliability of the structure by measuring the st...

AI Technical Summary

Problems solved by technology

Through the stress-strain relationship formula of the present invention, accurate and reliable stress at each position of the valve body can be obtained, thereby realizing long-term, real-time, online monitoring of the stress-strain state of the valve body, which not only solves the inaccurate and impossible measurement of the current resistance strain measurement method It can solve the problem of complex structure, and make up for the shortcomings in the field of valve body stress measurement in my country. It is of great significance for the long-term reliable operation of industrial valves and industrial safety production.

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