Abstract
The low pressure type gas welding or cutting torch has a character that the low pressure acetylene gas is sucked up with supplied high pressure oxygen gas at the injector.In the previous report, authors have decieded experimentaly the most suitable dimentions in injector.In this report, the experiments were investigated to the relations between mixed ratin of oxy-acetylene flame and supplied gas pressure in low and high pressure type torches.Consequently, following conclusion was obtained;In the case of the high pressure acetylene was used, the mixed ratio (O2/C2H2) of oxy-acetylene flame was remarkably incrersed according to the increase of supplied oxygen pressure, as shown in Fig. 2.In the case of the high pressure type torch was used, the change of mixed ratio of the flame caused by the supplied oxygen pressure, showed more sensitive change than that of low pressure type torch.In the case of the oxygen has extremely higher pressure than the its of acetylene, was supplied to the torch, the change of supplied oxygen pressure has little influence on the mixed ratio of the oxy-acetylene flame.
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