Steel chimney conical cap and manufacturing method thereof

The invention discloses a steel chimney conical cap and a manufacturing method thereof, and belongs to the technical field of steel chimney conical cap manufacturing, the steel chimney conical cap comprises a steel plate, a plurality of fixing columns are arranged on the outer side of the steel plate, inclined positioning supports are fixedly connected to the fixing columns, a traction lifting lug is arranged on the upper surface of the steel plate, and a steel wire rope is fixedly connected to the traction lifting lug; the steel plate is in a semi-arc sector shape, the number of the fixing columns is eight, the eight fixing columns are annularly distributed at equal intervals, the two ends of the steel plate are in a semi-polymerization shape, a V-shaped notch is formed between the two ends of the steel plate, and the two ends of the steel plate are polymerized together to form a welding seam. Through data calculation, the steel plate is machined into the circular steel plate with the V-shaped notch, the cir