论文部分内容阅读
利用汽化石油气代替乙炔气可以切割金属。经多年的使用和改进,不仅可以切割一般钢材,而且,可以切割厚度达60毫米的钢板。切割质量基本上能达到乙炔焰的切割水平。具体改制做法如下:1.割嘴改制环形乙炔割嘴见图1。使用这种割嘴用液化石油气进行切割时,火焰不集中,切割温度低,速度慢,尤其是点火调节困难。因此,对这种割嘴进行了改制,把内外嘴端部直线射流孔改为喇叭口式射流孔,
Gas can be cut using vaporized petroleum gas instead of acetylene gas. After many years of use and improvement, not only can the general steel be cut, but also steel plates up to 60 mm thick can be cut. Cutting quality can basically reach the cutting level of acetylene flame. The specific restructuring practices are as follows: 1. Cutting nozzles to make circular acetylene cutting nozzles are shown in Figure 1. When this type of cutting nozzle is used for cutting with liquefied petroleum gas, the flame is not concentrated, the cutting temperature is low, the speed is slow, and in particular, ignition adjustment is difficult. Therefore, this cutting nozzle was restructured, and the straight jet holes at the ends of the inner and outer nozzles were changed to flared jet holes.