The invention relates to a low-temperature
propellant rapid pre-cooling transmission pipeline structure. The low-temperature
propellant rapid pre-cooling transmission pipeline structure includes a ground
storage tank, a low-temperature liquid outlet of the ground
storage tank is connected with an inlet of a low-temperature transmission pipeline, an outlet of the low-temperature transmission pipeline is connected with a
propellant filling opening of an on-
rocket storage tank, and the low-temperature transmission pipeline includes an inner micro-ribbed
vacuum tube and a vacuum
straight tube; thevacuum
straight tube forms an annular cavity through an inner
straight tube and an outer tube, the annular cavity is vacuumized, and the outer side of the inner straight tube is wrapped with a plurality of heat insulation
layers; and the inner micro-ribbed
vacuum tube forms an annular cavity through a micro-ribbed inner tube and an outer tube, the annular cavity is vacuumized, the outer side of the micro-ribbed inner tube is wrapped with a plurality of heat insulation
layers, and micro-ribbed protrusions of the micro-ribbed inner tube are formed by
machining. The low-temperature propellant rapid pre-cooling transmission pipeline structure adopts the
layout form combining the inner micro-ribbed
vacuum tube and the vacuum straight tube, the
advantage of conversion from strengthened membranestate boiling to transition boiling of the inner micro-ribbed vacuum tube are used for achieving rapid pre-cooling, the
advantage of the small resistance of the vacuum straight tube is used, the flowresistance of the overall low temperature transmission pipeline is reduced, and the pre-cooling process is accelerated.