Clamping device for nondestructive detector

The utility model provides a clamping device for a nondestructive detector, which relates to the technical field of clamping devices and comprises a main screw. The outer part of the main screw rod is connected with a movable sleeve and a manual nut, and the movable sleeve is connected with the manual nut; one end of the main screw rod is connected with four main connecting rods in a surrounding manner; the exterior of the movable sleeve is connected with eight parallel connecting rods in a surrounding manner; the number of the movable rods is four, and the movable rods are connected with the main connecting rod and the two parallel connecting rods respectively. According to different shapes of pipelines, the four manual bolts can be rotated respectively, the movable rods are driven by the manual bolts to move along the guide sliding holes, the positions of the four rubber strips are adjusted, the spacing distance between the rubber strips and the center point is changed, the four rubber strips can make conta