| 摘要 |
PROBLEM TO BE SOLVED: To provide a water-cooled jacket for burner in which the cost required for replacing a worn jacket can be minimized. SOLUTION: A water-cooled jacket J is divided into a body section 1 and a head section 2 and a burner is inserted into inner tubes 11, 21. Cooling water channels PI, P2 are formed between the inner tubes 11, 21 and the outer tubes 12, 22 of double tubular structure. While keeping liquidtightness by means of an O-ring 31, a threaded part 221 formed in the inner circumferential surface of the outer tube 22 at the head section 2 is coupled with a threaded part 123 formed in the outer circumferential surface of the outer tube 12 at the body section 1. Furthermore, the outer circumferential surface of the inner tube 21 at the head part 2 can slide relatively to the inner circumferential surface of the inner tube 11 at the body section 1 while keeping liquidtightness by means of an O-ring. |
