Damage detection device for pressure vessel

The utility model discloses a pressure vessel damage detection device which comprises a lifting mechanism, a rotating mechanism and a telescoping mechanism, the rotating mechanism and the telescoping mechanism are placed in a pressure vessel through the lifting mechanism, and the rotating mechanism controls the telescoping mechanism through a rotating motor. The telescopic mechanism stretches out and draws back in the pressure container so that the detection equipment can be arranged in the pressure container in a three-dimensional space, the detection equipment is arranged at the position where the telescopic mechanism makes contact with the inner wall of the pressure container, and data collection is conducted on the inner wall of the pressure container through the detection equipment. And the nondestructive testing probe is moved to the weld joint for detection and analysis through the rotating mechanism and the lifter. According to the utility model, the nondestructive testing probe can be moved to any po