Ultrasonic flaw detection method of scraper circular chains

The invention provides an ultrasonic flaw detection method of scraper circular chains and relates to a mining scraper conveyor. By the method, the problem that breaking accidents of circular chains of the conventional scraper conveyor occur frequently and cannot be prevented is solved. The method particularly comprises the following steps of: 1, operating the scraper conveyor at a low speed of 0.3 to 0.5 m/s; 2, starting a flaw detector and turning on a water supply switch of a special probe to supply water for the probe; 3, using the special probe to slide through a straight section, with weld joints, of each circular chain sequentially, and observing echo of a set position; and 4, comparing with echo generated by a standard sample and calculating flaw depth, wherein a warning threshold value is determined by the standard sample, so that accident preventing warning is realized. By the method, the flaw depth can be calculated according to the echo generated by the standard sample and the echo generated by fla