NB-IOT ultrasonic water meter

The utility model discloses an NB-IOT ultrasonic water meter, and relates to the technical field of ultrasonic water meters. The NB-IOT ultrasonic water meter comprises a water meter water pipe, flanges are fixedly connected to the left end and the right end of the water meter water pipe correspondingly, a first water pipe and a second water pipe are connected to the surfaces of the opposite sides of the two flanges correspondingly, a water meter is arranged on the outer surface of the water meter water pipe, and a driving box is fixedly connected to the outer surface of the water meter water pipe; a rotating groove is formed in the inner wall of the water meter water pipe, a cleaning ring is rotationally connected into the rotating groove, a first blocking ring and a second blocking ring are rotationally connected to the left side surface and the right side surface of the cleaning ring correspondingly, and the rotating groove communicates with the interior of the driving box. The dirt on the inner wall of th