Ultrasonic flowmeter with noise reduction and rectification structure

The invention relates to the field of ultrasonic flow meters, in particular to an ultrasonic flow meter with a noise reduction and rectification structure, which comprises a pipeline, a mounting box is fixedly connected to the outer side wall of the pipeline, a detection controller is mounted on the mounting box, and two probes are mounted in the pipeline. Through the arrangement of the shielding piece on the bottom plate, the passing hole diameter of the adjusting hole can be adjusted through the shielding piece during use, it is guaranteed that when normal fluid is conveyed through the adjusting hole, conveying can be conducted through the small hole diameter of the small hole, and therefore it is guaranteed that the fluid can be fully and finely adjusted through the small hole diameter; and on the contrary, when fluid with high viscosity is conveyed, the fluid is conveyed through the adjusting holes with the large hole diameters, the rectification effect is guaranteed to the maximum degree, and meanwhile t