High-precision miniature high-pressure infusion pump system

Abstract

The invention discloses a high-precision miniature high-pressure infusion pump system. The high-precision miniature high-pressure infusion pump system comprises an infusion pump body; a speed regulating mechanism is arranged in the infusion pump body; an infusion mechanism and an alarm mechanism are arranged on one side of the infusion pump body; an air pressure cavity is formed between the infusion mechanism and the infusion pump body; a motor is fixedly connected to the inner wall of the bottom of the infusion pump body; a rotating shaft is in power connection with an output shaft of the motor; and the outer wall of the top end of the rotating shaft is fixedly connected with a half gear. Through an arranged infusion mechanism, the motor works to drive the half gear and an inner gear to rotate in a meshed mode, when the half gear and the inner wall of one side of the inner gear rotate in a meshed mode, the inner gear moves backwards (forwards) so that a piston moves backwards (forwards), a diaphragm shrinks inwards, a liquid inlet ball valve is opened, a liquid outlet ball valve is closed, and one-time pumping is completed; and when the half gear continues to rotate and is meshed with the inner wall of the other side of the inner gear, liquid in an infusion cavity is pumped out, pumping-in and pumping-out can be completed without positive and negative rotation switching in the process, and the working efficiency of the high-pressure infusion pump is improved.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a high-precision miniature high-pressure infusion pump system. Background technique [0002] Intravenous infusion is a commonly used method of administration in clinical treatment. According to the different properties of the drug and the constitution of the patient, the speed of intravenous infusion is also different. Too fast or too slow infusion can hardly achieve the expected therapeutic effect, and even affect the safety of nursing. The infusion pump is an instrument that can accurately control the number of infusion drops or the flow rate of the infusion, so as to ensure that the drug can enter the patient's body with a uniform speed, an accurate dose, and a safe effect. [0003] At present, most common infusion pumps widely used clinically use cams to drive the movement of the plunger rod. The movement precision of the plunger rod is low, and the movement law dep...

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Problems solved by technology

[0003] At present, most common infusion pumps widely used clinically use cams to drive the movement of the plunger rod. The movement precision of the plunger rod is low, and the movement law depends on the cam curve. However, there are many changing parameters of the infusion pump, such as: pump flow setting value, Real-time pressure, liquid compressibility, etc. Therefore, the cam pump cannot achieve constant flow infusion under various working conditions. In addition, ordinary infusion sets lack functions such as blockage alarm and liquid infusion alarm. Therefore, a high-precision Miniature high-pressure infusion pump system to solve such problems

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