Pipeline detection device

The utility model discloses a pipeline detection device which comprises a base, a rotation driving piece and a lead screw, threaded sleeves are arranged outside the two ends of the lead screw, a movable plate is arranged at the top ends of the threaded sleeves, limiting sliding blocks are arranged on the two sides of the bottom end of the movable plate, and a U-shaped groove is formed in the center of the top end of the movable plate. A first protection pad is arranged on the inner side of the U-shaped groove, four first telescopic assemblies are arranged on one side, close to the outer side of the U-shaped groove, of the movable plate, telescopic rods are arranged at the output ends of the first telescopic assemblies, and sealing plates are arranged at one ends of the telescopic rods. According to the utility model, the first telescopic assembly is arranged on one side of the moving plate, so that the first telescopic assembly drives the sealing plate to move transversely through the telescopic rod, and then