Anti-locking shell for impeller

The utility model discloses an anti-locking shell for an impeller. The device comprises a fixed shell and a movable shell, a fixing frame is installed in the middle of the lower end of the fixing shell. The interior of the fixed frame is connected with a movable ring through a rotating groove; meanwhile, a shaft column penetrates through the interior of the movable ring; limiting blocks are fixedat the upper and lower ends of the shaft column; an impeller body is fixed in the middle of the shaft column; the lower end of the movable shell is connected with the fixed shell through a clamping sleeve and a clamping ring. The interior of the clamping ring is connected with a connecting shaft through a preformed groove; and meanwhile, the lower end of the connecting shaft is connected with a reserved groove through a supporting spring, a fixed block is arranged at the outer end of the fixed shell, a control column is rotatably connected into the fixed block, the upper end of the control column is connected with the