The application relates to an injection tube
assembly, a high-
pressure injection device, a high-
pressure injection system and a control method thereof. The
syringe of the injection tube
assembly is installed on an injection installation position of the high-
pressure injection device, the
liquid injection tube group is installed on a
liquid injection installation position, the liquid
discharge tube group is installed on a liquid
discharge installation position, and the exhaust bag is installed in the installation groove. The boost driving mechanism drives the
piston to move backward in the injection cylinder, and the liquid
medicine is sucked into the injection cylinder through the first pipeline of the
liquid injection tube group. The boost driving mechanism drives the
piston to move forward in the injection cylinder, and the liquid
medicine in the injection cylinder is pushed into the exhaust bag through the second pipeline. After the liquid
medicine enters the exhaust bag, the liquid medicine sinks due to gravity and boost pressure and is discharged through the liquid
discharge tube, and the bubbles float to the space above the liquid medicine. Even during the liquid medicine injection process, the bubbles can be prevented from being pushed into the
human body in the exhaust bag, the continuity of the injection process is guaranteed, the requirement for the structure
air tightness and stability is reduced, and the reliability during use is ensured.