Plug-in type special-shaped uniform-speed tube flowmeter

The utility model discloses a plug-in type special-shaped uniform-speed pipe flowmeter, which comprises a pipeline, a measuring rod, a connecting flange, a companion flange, a fixed base, a pressure guide pipe and an external thread stop valve, the measuring rod horizontally penetrates through the inner wall layer of the pipeline, the end part of the measuring rod is fixed on the fixed base, the fixed base is arranged on the inner wall of the pipeline, and the connecting flange is connected with the companion flange. The companion flange is fixed on the pipe wall of the pipeline, the connecting flange is fixedly connected with the companion flange, two communicating through holes are formed in the measuring rod, the communicating through holes are parallel to the horizontal center line of the measuring rod, and a negative pressure tapping hole and a plurality of positive pressure tapping holes are formed in the part, located in the pipeline, of the measuring rod. Preliminary fixing is carried out through the