OUTER NOZZLE FOR THE CUTTING HEAD OF A FLAME CUTTER

摘要

A cutting head for a flame cutter feeds oxygen through a central nozzle and a mixture of oxygen and natural gas through a ring of peripheral nozzles that converge at a point on the axis of the oxygen stream at an angle of 25 DEG to 45 DEG . The peripheral nozzles are fed from an annular mixing chamber at least five times the volume of the inner nozzle, and the total cross-sectional area of the peripheral nozzles is from two to eight times the cross-sectional area of the discharge orifice of the inner nozzle.