| 摘要 |
PURPOSE:To keep away a superconductive coil from an adverse influence of welding heat by a method wherein the welded position of a spool and a cover is provided at the position apart from the superconductive coil. CONSTITUTION:A superconductive coil 3 is formed by winding a superconductive wire after guiding to the guide edge 2a of a spool 2 having a ?-shaped section. A coil 3 is inserted in the spool 2 so as to cover the coil 3 with an impregnating cover 8 provided with a welding edge 7, and a container 10 is formed by welding the end section of a guide edge 2a and the end section of the edge 7 of the cover 8. Next, the opening section 1 of the spool 2 is covered with a refrigerant flowing path cover 11 to weld to the edge 2a of the spool 2, and a refrigerant flow path 12 is formed with the cover 8. Synthetic resin 14 is injected in the gaps among the coil 13, spool 2, and cover 8 by vacuum impregnation for hardening. This reduces friction by electromagnetic force to decrease occurrence of quenching, thereby the superconductive coil is exempted from an adverse influence of welding heat. |
