Complex thin-walled structure with inner and outer flanges

The utility model discloses a complex thin-walled structure with an inner flange and an outer flange, which belongs to the technical field of complex thin-walled parts and comprises an outer thin-walled part and an inner thin-walled part, the inner thin-walled part is sleeved in the outer thin-walled part, and the tops and bottoms of the outer thin-walled part and the inner thin-walled part are respectively clamped with an upper outer flange and a lower outer flange. An upper inner flange is fixedly welded to the end, close to the upper outer flange, of the gap between the outer thin-wall part and the inner thin-wall part, a lower inner flange is fixedly welded to the end, close to the lower outer flange, of the gap between the outer thin-wall part and the inner thin-wall part, and a packaging mechanism is installed between the lower inner flange and the lower outer flange. The cavity between the outer thin-wall part and the inner thin-wall part is welded and reinforced through the upper inner flange and the