One-way measurable pipeline

The invention discloses a one-way measurable pipeline which structurally comprises a connecting pipe, a moving plate, an adjusting ring and a metering mechanism, the adjusting ring is fixedly embedded in the side face of the moving plate, the moving plate is installed on the side face of the metering mechanism, and the metering mechanism is fixedly embedded in the connecting pipe. Then the throughput is obtained through the flow area and the flow velocity, the rotating speed of the rotating mechanism and the scales on the scale belt are displayed as correct numerical values, then the transfer gear is rotated, the scale belt rotates on the outer side of the rotating shaft, and the throughput displayed on the scales on the scale belt is obtained through the rotating throughput of the liquid to the rotating mechanism; and the connecting disc is manually extruded, meanwhile, the movable block is meshed with the rotating shaft, then the connecting disc is rotated to enable the movable block to drive the rotating s