| 摘要 |
A torch (100) is provided with a torch body (103), a tip orifice (107) structure, and a tube (101). The torch body (103) has an upstream cavity (110), a mixture cavity (113) with a plurality of conical bores (104) through its sidewall to permit a flow of air into it, and a tube connection portion (102). The tip orifice (107) structure is inserted into upstream cavity (110) and has a bore through its centre. The bore has a first diameter and directs a fuel to the mixture cavity (113). The tube connection portion (102) transports the fuel/air mixture from the mixture cavity (113) to the tube (101) to build a flame at the tube's exit. The ratio of the first diameter of bore and the inner diameter (iD) of the tube (101) is in the range of 5 to 7% for acetylene as fuel, or in the range of 2 to 3% for either propane or propylene as fuel. |
