| 摘要 |
PURPOSE:To simplify an injection operation of coolant, to shorten an injection time, to save coolant, and to improve a superconducting magnet device in safety against the quenching of a superconducting coil by a method wherein a three way valve mechanism, which is provided inside an injection pipe main body to guide coolant by switching to either of a first and a second discharge opening as operated from outside, is provided. CONSTITUTION:An injection tube device 15 is composed of an injection tube main body, 8 which is provided with a first discharge opening 10 positioned above a superconducting coil 3 and a second discharge opening 11 positioned below the superconductive coil 3, and a three way valve mechanism 9 which guides coolant 4 by switching to either of the first and the second discharge opening, 10 and 11, as operated from outside. Therefore, the coolant 4 is discharged through the second discharge opening 11 positioned below the superconducting coil 3 to be injected at an initial injection and discharged through the first discharge opening 10 positioned above the superconductive coil 3 to be injected at injection when the coil 3 is in an excited state. By this setup, an injection operation of coolant can be simplified, an injection time can be shortened, coolant can be saved, and a superconductive magnet device can be improved in safety against the quenching of a superconducting coil. |
