Anti-blocking ultrasonic heat meter

The anti-blocking ultrasonic heat meter comprises a heat meter body and further comprises an anti-blocking mechanism installed on a measuring tube of the heat meter body, the anti-blocking mechanism comprises a filtering assembly and a cleaning assembly, the filtering assembly comprises a filtering box, a filtering plate and a sealing cover, the filtering box is installed on the measuring tube, the filtering plate is detachably installed on the inner wall of the filtering box, and the cleaning assembly is installed on the sealing cover. The cleaning assembly comprises an annular cleaning ring, a cleaning rod is arranged on the inner wall of the cleaning ring in the diameter direction, a cleaning brush making contact with the filter screen is arranged on the side, close to the filter screen, of the cleaning rod, and the cleaning ring is rotationally connected between the filter box and the measuring tube in a sealed mode. A water outlet is formed in the bottom of the end, close to the cleaning ring, of the mea