Studies on the Prperties of the Low Pressure Type Gas Welding or Cutting Torch

Abstract

The factors which decicde the character of the low pressure type gas welding or cutting torch are considered as follows : (a) the external factors the supplied oxygen pressure and the supplied acetylene pressure, (b) the inner factors the combinations of the parts of the injector, and the relations between the conditions of oxygen jet stream and the combinations of injector components.
In the previous retort, authors investigated the influence of the external factors on the mixed ratio of the flame.
In this report, the experiments were made on the effect of the two injector components which were defined in the report 1.-the diameter of the oxygen nozzle and length of the injecting part. The results of the experiments are as follows : the energy of the oxygen jet stream at the entrance of the mixing part had greater influence on the P₄ pressure than the energy at the exit of the oxygen nozzl. Having the shortest injecting part or the smallest diameter of the mixing part, the injector could give the lower P₄ pressure. In the next combinations of the injector components the lowest p4 pressure was given ;
(i ) D=1.2mm^φ, l=2.8-3.8mm, to d=0.46mm^φ
(ii) D=1.2-1.4mm^φ, l=1.8mm to d=0.60mm^φ
(iii) D=1.2-1.4mm^φ, l=1.8mm to d=0.99mm^φ