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The principle and classification of injection pump


The principle of the injection pump:

When working, the single-chip microcomputer system sends control pulses to rotate the stepper motor, and the stepper motor drives the screw to change the rotary motion into a linear motion, and pushes the piston of the syringe for infusion, achieving high-precision, smooth and pulse-free liquid transmission. The injection speed can be set by the operator through keyboard operation. After the syringe pump is started, the CPU provides motor drive voltage by means of D / A conversion. The motor rotation detection circuit is a group of photo-coupled circuits that generate a pulse signal through the rotation of the motor. This pulse signal is fed back to the CPU. The CPU controls the motor voltage based on this feedback to obtain the set speed.

Classification of the injection pump:

According to the use, injection pump can be divided into medical and non-medical, as well as laboratory micro-injection pump and industrial injection pump. According to the number of channels, it can be divided into single channel and multiple channels (dual channel, four channel, six channel, eight channel, ten channel, etc.). According to the working mode, it can be divided into single push and push and pull and bidirectional push and pull modes. According to the structure, it can be divided into split type and combined type, etc.

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