Double-wall glass fiber reinforced plastic smoke exhaust cylinder

The utility model relates to a double-wall glass fiber reinforced plastic smoke exhaust cylinder, and belongs to the technical field of chimney design and construction. The smoke discharging cylinder is provided with a double-layer cylinder wall, the double-layer cylinder wall comprises an inner wall and an outer wall, and a connecting web plate is arranged between the inner wall and the outer wall; a cavity is formed among the inner wall, the outer wall and the connecting web plate; annular stiffening ribs are arranged on the periphery of the outer wall of the double-layer cylinder wall. The bending rigidity of the cylinder walls and the critical stress level of the cylinder body are increased through the double cylinder walls and the connecting web plates, the stability and the overall bearing capacity of the cylinder walls are improved, materials of the cylinder body are saved, and the heat preservation performance of the cylinder body is improved. Due to the arrangement of the rigid diaphragm stiffening r