Flame tube structure of turbojet engine

The utility model relates to a flame tube structure of a turbojet engine. The flame tube structure comprises an inner tube, an outer tube, a tube top and an air inlet group, wherein the inner cylinder and the outer cylinder are of cylindrical structures, and the inner cylinder and the outer cylinder are provided with first ends and second ends; the inner cylinder is sleeved with the outer cylinder, the outer cylinder coincides with the central axis of the inner cylinder, a combustion area is formed between the outer cylinder and the inner cylinder, the first end of the outer cylinder is aligned with the first end of the inner cylinder, and the second end of the inner cylinder extends out of the outer cylinder; the cylinder top is of an annular structure, the periphery of the cylinder top is connected with the outer cylinder, the inner periphery is connected with the inner cylinder, and a gap between the inner cylinder and the first end of the outer cylinder is sealed through the annular structure. The air inl