Orifice plate flowmeter with jacket

The utility model discloses an orifice plate flowmeter with a jacket. The orifice plate flowmeter comprises a material inlet, a top support is arranged at the top end of the material inlet, the lower portion of the material inlet is connected with the jacket, the lower end of the jacket is connected with a steam inlet while the upper end of the same is connected with a steam outlet, the bottom of the material inlet is connected with the inner wall of the jacket, an orifice plate is arranged in the middle of the inner wall of the jacket, each of the left end and the right end of the inner wall of the jacket is connected with a sight mirror, the lower end of the inner wall of the jacket is connected with a material outlet, a bottom support is arranged at the lower end of the material outlet, bolts are arranged at positions where the jacket is connected with the sight mirrors, the orifice plate is made by a nickel material N6, multiple plate orifices are formed in the orifice plate, and height of one end, close to the material outlet, of the jacket is slightly smaller than that of one end, close to the material inlet, of the jacket.