Portable ultrasonic flowmeter

The utility model relates to the technical field, and discloses a portable ultrasonic flowmeter which comprises a safety helmet, a groove is formed in the top end of the safety helmet, a first sliding groove is formed in the bottom end of the groove, two fixing rods are fixedly installed at the bottom end of the groove, and the two fixing rods are oppositely arranged on the two sides of the first sliding groove; the sliding strips at the two ends of the ultrasonic flowmeter body are inserted into the first sliding groove and the second sliding groove respectively, then the clamping block is loosened, and due to the elastic effect of the tension spring, the ultrasonic flowmeter body is fixed between the clamping block and the safety helmet through the elastic force of the tension spring; then a bolt on the fixing plate is rotated to be in threaded connection with a threaded hole in one end of the ultrasonic flowmeter body, further fixing of the ultrasonic meter body is achieved, the meter is fixed in the safet