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    • 3. 发明公开
    • MIXING APPARATUS FOR MICROFLOW GRADIENT PUMPING
    • 用于微流量梯度泵送的混合装置
    • EP0757587A1
    • 1997-02-12
    • EP96908543.0
    • 1996-02-23
    • Jiann-Fu Yang, Frank
    • Jiann-Fu Yang, Frank
    • B01F13F04B9F04B23F04B49F04B53G01N30
    • G01N30/36B01F13/0827F04B9/047F04B23/06F04B49/065F04B49/20F04B53/102F04B53/1075F04B53/147F04B53/20F04B2203/0209F04B2205/05G01N30/02G01N30/34G01N2030/322G01N2030/326G01N2030/328G01N2030/342G01N2030/347Y10T137/2572Y10T137/7838Y10T137/7896Y10T137/8122Y10T137/86163B01D15/40
    • An improved mixing unit (170) and check valve (930A, 930C) for a fluid pumping system wherein gradient proportioning is performed at high pressure are described. The mixing unit has lining means disposed on the inner surface of the chamber (406) for preventing frictional contact between the steel of the chamber and the surface of the rotor (416). The lining means is formed of a polymeric material selected for frictional compatibility with the rotor, and avoids formation of undesirable particulates by friction with the rotor surface. The check valve (930A, 930C) has a poppet (932) comprising a midsection (938) dimensioned to provide forward and rearward surfaces against which fluid flow will exert force, a first arm (934) extending transversely from the midsection first side toward the valve inlet (954), a second arm (936) extending transversely from the midsection second side toward the valve outlet (950), and first and second resilient seals (944, 946) respectively annularly disposed about the first and second arms. The resilient seals are formed of a resiliently compressible material, and have an uncompressed thickness which is somewhat greater than the first arm length.
    • 描述了用于流体泵送系统的改进的混合单元(170)和止回阀(930A,930C),其中在高压下执行梯度比例分配。 混合单元具有设置在腔室(406)的内表面上的衬里装置,用于防止腔室的钢与转子(416)的表面之间的摩擦接触。 衬里装置由选择用于与转子摩擦相容的聚合物材料形成,并且通过与转子表面摩擦而避免形成不希望的微粒。 所述止回阀(930A,930C)具有提升阀(932),所述提升阀包括中间部分(938),所述中间部分的尺寸设定为提供流体流将施加力的前表面和后表面,第一臂(934)从中间部分第一侧朝向 阀入口954,从中间部分第二侧朝向阀出口950横向延伸的第二臂936以及分别环形地设置在第一臂和第二臂周围的第一和第二弹性密封件944,946。 弹性密封件由弹性可压缩材料形成,并且具有比第一臂长稍大的未压缩厚度。