Method for detecting defects of furnace tube based on magnetostrictive ultrasonic guided wave detection technology

Abstract

The invention relates to the technical field of furnace tube defect detection, in particular to a method for detecting defects of a furnace tube based on a magnetostrictive ultrasonic guided wave detection technology. The method comprises the following steps: forming T-mode guide waves on a furnace tube to be detected by a magnetic field applying device in an MsS ultrasonic guided wave system, wherein the magnetic field applying device comprises a thin ferromagnetic ferrocobalt belt and a magnetizing device; transmitting a current pulse with a fixed frequency in the furnace tube by an adapter of the MsS ultrasonic guided wave system; collecting an echo signal returned on the furnace tube by an echo signal collecting device of the MsS ultrasonic guided wave system; receiving the echo signal by a host computer of the MsS ultrasonic guided wave system, and generating a furnace tube defect detection chart; determining the defects of the furnace tube according to the furnace tube defect detection chart, wherein the determined defects comprise crack defects and corrosion defects. The state of the whole furnace tube can be observed by utilizing the method, and quick detection and positioning for the defects of the furnace tube are realized, so that the technical problem that the defects of the furnace tube cannot be effectively defected in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of furnace tube defect detection, in particular to a method for detecting furnace tube defects based on magnetostrictive ultrasonic guided wave detection technology. Background technique [0002] Energy has a particularly important strategic position in the national economy and is the lifeblood of human economic development. The main supplier of energy is petrochemical industry, and large-scale tubular fuel heating furnace is widely used and indispensable important equipment in petrochemical enterprises. and rapid socio-economic development. [0003] Due to the long-term operation of the furnace tube in very harsh environments such as flames, flue gas, and fly ash, and the influence of factors such as medium corrosion, wear, and cracking during service, the furnace tube is extremely prone to carburization, carburization cracking, bending, creeping, etc. Failure accidents such as variable cracking, thermal ...

AI Technical Summary

Problems solved by technology

Although a lot of research has been done on the detection of furnace tubes at home and abroad in recent years, there is still no effective method to detect the defects of furnace tubes.

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