| 摘要 |
PURPOSE:To contrive an improvement in durability of a burner top, by so constituting the titled device that supply of a cooling fluid to a spouting part of the tip is suspended automatically by differential pressure under a supply state of fuel gas and the cooling fluid is supplied automatically to the spouting part of the tip under a suspended state of the fuel gas. CONSTITUTION:A fuel gas supply passage 3 is constituted with an annular flow path 3a formed of a third component 1c and a hollow first cylinder body 7, a first branch path 3b ramified in three circumferential directions provided in connection with the annular flow path 3a, an annular first header 3c formed between a second component 1b and the third component 1c, a second branch flow path 3d formed on the second component 1b, an annular second header 3e formed between a first component 1a and the second component 1b, and a third branch flow path 3f formed on the first component 1a in an externally expanded state, and the respective tips of the third branch flow path 3b are made into spouting parts 4. A cooling fluid supply passage 9 supplying air as a cooling fluid is constituted with an annular flow path 9a, a branch flow path 9b, a header 9c and a communication passage 9d. |
