| 摘要 |
<p>The invention relates to an improved torch which be widely used for welding, cutting and heating of nonferrous metallic, ferrous metallic and nonmetallic materials, wherein the torch uses petrol-oxygen as fuel and vaporizes petrol by self-preheating. The torch is comprised of nozzle, torch-body, oil pipe, oil storage tank etc. and its flame temperature can be as high as 2700 °C. Its advantages include high operation speed and high quality of welding and cutting, as well as the cost of the torch can be cut down more than 90 % compared with acetylene torch.</p> |
