ROTATIONAL FLOW SEMI-PREMIXING GAS BURNER

The utility model relates to a rotational flow semi-premixing gas burner, aiming at the defects of large gas consumption and easy blocking of the original mixing burner nozzle to do a series of improvements to the structure of the burner nozzle. The rotational flow semi-premixing gas burner increases the diameter of a necking on the middle of a shower head, increases the included angle between a rotational flow vane and an axial line, decreases the cone angle between the contracted section and the expanding section of the necking, enlarges the distance between the shower head and the spout of the burner nozzle, and changes the arrangement of shower head premixing holes. The improved burner nozzle has good effect of energy saving and uneasy blocking, and the utility model can works in the condition of lower gas pressure.