Pipe expansion prevention device of pipe belt type conveyor

The utility model relates to the technical field of pipe belt conveyors, and discloses a pipe expansion prevention device of a pipe belt conveyor, which comprises a mounting box, a first telescopic rod is fixedly mounted at the bottom of an inner cavity of the mounting box, a supporting plate is fixedly mounted at the top of the first telescopic rod, a first motor is fixedly mounted at the top of the supporting plate, and a second motor is fixedly mounted at the bottom of the first telescopic rod. Rotating shafts are fixedly mounted on the two sides of the first motor, transmission gears are fixedly mounted at the tops of the rotating shafts, and transmission belts are connected to the tops of the transmission gears in an engaged mode; and a tightening mechanism is arranged on the front surface of the mounting box. According to the pipe expansion prevention device of the pipe belt conveyor, the height of the supporting plate is conveniently driven and adjusted through the arrangement of the first telescopic r