Automatic sand blasting device for special-shaped inner surface of deep-inner-cavity circular shell

The invention discloses an automatic sand blasting device for a special-shaped inner surface of a deep-inner-cavity circular shell. The automatic sand blasting device comprises a sand blasting trolley system and a grass gun system, automatic sand blasting is achieved on the surface of the inner cavity of the shell through the sand blasting trolley and the hierot gun system, the sand blasting trolley serves as a support for parts and automatically rotates during shell sand blasting, and the hierot gun system serves as a spray gun and automatically stretches out, draws back and rotates through a transmission device. A plurality of supporting wheel structures are designed on the sand blasting trolley according to the sizes of different parts, and the structures can adapt to sand blasting of shells with the diameter phi ranging from 10 mm to 600 mm. In order to adapt to sand blasting of parts with different lengths, the distance between the movable support and the fixed support is adjusted through a movable suppo