Device for measuring outer diameter of plastic pipe fitting

The utility model discloses a device for measuring the outer diameter of a plastic pipe fitting, which comprises a detection disc, a conveying through hole convenient for the plastic pipe fitting to pass through is arranged on the detection disc, a sliding disc is arranged in the detection disc, and a detection through hole which is coaxial with the conveying through hole and is consistent with the conveying through hole in size is arranged in the center of the sliding disc. More than one laser detection head is uniformly distributed on the circumferential surface of the detection through hole in the sliding disc, the detection end of each laser detection head is aligned to the side wall of the plastic pipe fitting passing through the detection through hole, more than one adjusting hand wheel is annularly distributed on the side edge of the detection disc, the adjusting hand wheels are in threaded connection with the detection disc, and the adjusting hand wheels are in threaded connection with the detection d