Pipeline system of closed-loop cooling liquid-helium-free superconducting magnet coil

The utility model discloses a pipeline system of a closed-loop cooling liquid-helium-free superconducting magnet coil, and relates to the technical field of superconducting magnets. Comprising a 300K shell, a closed cavity is formed in the 300K shell, a coil framework wound with a magnet exciting coil is arranged in the closed cavity, a cold conduction copper pipe is tightly attached to the exterior of the magnet exciting coil, two transition connecting pipelines are fixed to the top of the 300K shell in a penetrating and sealing mode, and cold insulation pipelines are arranged between the two transition connecting pipelines and the liquid inlet end and the liquid outlet end of the cold conduction copper pipe for communication; according to the utility model, the cold insulation pipeline with poor thermal conductivity is arranged between the cold conduction copper pipe and the transition connection pipeline, so that the pre-cooling temperature of the cold conduction copper pipe is kept to the greatest extent,