Transfusion system check hydraulic device's closure member

The utility model provides a transfusion system check hydraulic device's closure member belongs to medical instrument technical field. This transfusion system check hydraulic device's closure member has solved present transfusion system check hydraulic device structural instability, has ended the not good problem of liquid effect. This transfusion system check hydraulic device's closure member leans on the portion to paste the grafting portion no. 2 of leaning on portion's upside and being the tube -shape with lieing in including being circular flaky subsides, pastes and leans on the portion including the closure portion that lies in two outsides in the grafting portion no. 1 and the closure portion no. 2 that lies in two bottoms in the grafting portion, have in the closure portion no. 1 to be the annular strengthening rib of circle, the strengthening rib with paste by a coaxial setting, the thickness of closure two is greater than the thickness of closure. This transfusion system check hydraulic device's closure member is the annular strengthening rib of circle because closure portion no. 1 goes up to set up, and the thickness of closure two is greater than the thickness of closure to the liquid outlet department shutoff of storing the cup with the bit that makes that the closure member can be more stable makes transfusion system check hydraulic device's structure more stable, and it is better to end the liquid effect.