| 摘要 |
PURPOSE:To avoid the effect of plastic deformation of an internal cylinder, by providing the double structure of a combining part which comprises an external container and the internal cylinder having a high pressure chamber with a tapered part, providing a gap therebetween, and connecting a compressing pipe and an shooting pipe to both sides f the external container. CONSTITUTION:The combining part 3 is constituted by the external container 14 and the internal cylinder 13 having the high pressure chamber 3a with the tapered part 12. A gap is provided between the external container 14 and the internal cylinder 13. Brass supporting rings 16 and 16 are inserted between both ends of the internal cylinder 13 and the external container 14. Even though the internal cylinder 13 is subjected to the plastic deformation and the outside is swelled in a drum shape, the swell is absorbed by the gap 15. Even though the internal cylinder 13 is damaged, it is readily replaced by a new cylinder. |
