Device for rectifying ultrasonic gas meter

The invention relates to a device for rectifying an ultrasonic gas meter, which belongs to the technical field of metering instruments and comprises a flow channel shell, a rectifying piece, a spacer, a flow guide fin and a transducer. And an inner cavity of the flow channel shell is a multi-curve flow channel. A plurality of curved rectiblocks are arranged in the metering cavity of the flow channel shell and are overlapped in parallel at intervals, and a plurality of flow guide fins which are arranged at intervals are arranged between the buffer cavity and the metering cavity. Transducers are assembled at two ends of the metering cavity. The rectiblocks are perpendicular to the flow guide fins. A buffering cavity is formed in an air inlet of the flow channel shell, a non-return turning plate and separated rectiblocks are arranged in the buffering cavity, the airflow flowing direction can be regularly changed or finely adjusted through an arc-shaped curved channel, the airflow direction is forcibly rectified,