Pipeline connecting structure of heating flow meter

The utility model discloses a heating flow meter pipeline connecting structure which comprises a metering pipe, a dial plate is arranged on the upper portion of the outer side of the metering pipe, an inner flange is fixedly installed on the outer side of the metering pipe, and the outer side of the inner flange abuts against an outer flange. An input pipe is fixedly installed on the outer side of the outer flange, and the outer flange and the input pipe are connected through a connecting mechanism. The inner flange and the outer flange can be fixed through the bolt and the nut, the U-shaped frame is inserted into the groove, the inner wall of the U-shaped frame can abut against the outer side of the bolt and the outer side of the nut, and then the blocking piece is inserted into the penetrating hole. The stopping part is arranged on the outer side of the metering pipe, so that the stopping part can abut against the outer sides of the bolt, the input pipe, the nut and the metering pipe, the bolt and the nut c