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    • 12. 发明授权
    • Zero dead volume variable restrictor
    • 零死体积变量限制器
    • US5169120A
    • 1992-12-08
    • US486055
    • 1990-02-27
    • James W. Guthrie, Jr.Steven M. Lurcott
    • James W. Guthrie, Jr.Steven M. Lurcott
    • B01L3/00G01N30/32G01N30/60
    • B01L3/565B01L3/567G01N30/6004G01N2030/324
    • A variable restrictor for controlling flow rate including a ferrule formed of a yieldable material and having an opening at one end cooperating with the carrier line delivering fluid thereto. A passageway in the ferrule communicating with the carrier line terminates at the opposite end of the ferrule which is provided with a conical-shaped end portion cooperating with a recess of a conforming taper provided in a member having a passageway communicating with the utilization device receiving the fluid. The flow rate is regulated by controlling the position of the ferrule relative to the cooperating recess which controls the amount of compression exerted upon the forward end of the ferrule and hence the amount of constriction of the passageway extending therethrough. The variable restrictor assembly is provided with first external adjustment means for regulating flow rate and internal adjustment means for controlling the force exerted by a yieldable holding collet upon the carrier line to maintain the carrier line in place even in the presence of high operating pressures, the internal and external adjustment devices being capable of adjustment totally independently of one another.
    • 一种用于控制流量的可变限制器,包括由可屈服材料形成的套圈,并且在一端具有与向其输送流体的载体线协作的开口。 与支撑线连通的套圈中的通道在套圈的相对端处终止,该套圈设置有锥形端部,其与设置在具有与利用装置相通的通道的构件的配合锥形配合的凹部配合, 流体。 通过控制套圈相对于配合凹槽的位置来调节流量,该配合凹槽控制施加在套圈前端上的压缩量,并因此控制延伸穿过其中的通道的收缩量。 可变节流器组件设置有用于调节流量的第一外部调节装置和用于控制由可承受的保持夹头施加在载体线上的力的内部调节装置,以便即使存在高操作压力也将载体线保持在适当的位置, 内部和外部调节装置能够完全独立地进行调节。