Flowmeter with corrosion resistance, blocking resistance and wear resistance

The utility model discloses a flowmeter with corrosion resistance, blocking resistance and wear resistance, belonging to the field of flow measurement. The flowmeter is improved on the basis of a bar-type flowmeter, is combined with sleeves made of corrosion-resistant and wear-resistant materials and adopts a tight combination structure treated by a plastic spraying (plastic lining) technology. The flowmeter disclosed by the utility model has the advantages that enlarged standard flanges are adopted for combining the corrosion-resistant type sleeve, a plastic-spraying (plastic lining) inner core and a flow sensor together, and the connection with the flanges adopts a pressing-cushion type butting; a differential pressure transmitter is connected with a plastic valve group so as to isolate from the corrosivity; the valve group is connected with a back-blowing medium so as to prevent from blocking; a sectional type calculation formula is adopted, so that the detecting accuracy is improved, and the requirement t