Central exposure support for nondestructive testing of pressure container

The utility model discloses a central exposure support for nondestructive testing of a pressure container, which relates to the technical field of nondestructive testing equipment of the pressure container and comprises the pressure container and a positioning ring arranged in the pressure container, and a detection mechanism for detecting the pressure container is arranged on the positioning ring. The detection mechanism comprises three sleeves fixedly connected to the side wall of the positioning ring, shrinkage cylinders are arranged on the side walls of the three sleeves in a penetrating mode, abutting blocks are fixedly connected to the side walls of the three shrinkage cylinders, and a fixing mechanism used for fixing detection equipment is arranged in the positioning ring. The central exposure support can adapt to detection of pressure containers with different inner diameters, the application range of the device is further enlarged, in addition, by increasing the friction forcebetween the abutting blo