The invention discloses a
heparin pump. The
heparin pump comprises a casing, a
machine frame, a stepping motor, a
control circuit board, a lead screw, a lead screw nut, a guide rail and a sliding block connection block, wherein the
machine frame is fixed in the casing, the stepping motor and the
control circuit board of the stepping motor are arranged on a motor installation plate of the
machine frame, one
tail end of the lead screw is directly connected with a driving shaft of the stepping motor, the other
tail end of the lead screw is in supporting connection with a supporting sleeve, the lead screw nut is in threaded connection with the lead screw, the lead screw nut is fixed to the nut connection block, the guide rail is fixed to the side plate of the machine frame, and the sliding block connection block is arranged on the guide rail. A spring with preset pressure is compressed in an inner hole of the sliding block connection block by the nut connection block through an axial
retainer ring, and one
tail end of the sliding block connection block is fixedly connected with a push rod for directly pushing an
injector matched with the
heparin pump in use. The heparin pump is simple and reliable in structure and has the functions of blockage, empty liquid warning, fast heparin injection and slow heparin injection.