我们试制了一种螺旋喷射切割氧流的气割咀,简称“螺旋喷咀”。经过两年来的使用,证明用这种割咀切割铸钢件冒口,效果良好,切割能力比GOI—300型割炬提高30％以上,而且很少回火,排渣好,寿命长,结构简单。这种螺旋喷咀的结构,是在普通割咀的切割氧孔道中加装一只“三头螺旋进风器”(简称“进风器”),见图1。 We trial-produced a spiral jet cutting oxygen cutting Tsui, referred to as “spiral nozzle.” After two years of use, proved with this cutting Tsui cutting steel riser, the effect is good, cutting ability than the GOI-300 torch increased by 30% and less tempering, good slag, long life, structure simple. The structure of this spiral nozzle is to install a “three-headed spiral air inlet device” (abbreviated as “air inlet device”) in the cutting oxygen channel of an ordinary cutting nozzle, as shown in FIG. 1.