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    • 6. 发明授权
    • Flow rate controller
    • 流量控制器
    • US4512187A
    • 1985-04-23
    • US322729
    • 1981-11-19
    • Peter L. Sigwardt
    • Peter L. Sigwardt
    • G01F3/16F16K37/00G01F3/14G01F11/04G01F11/08G01F3/02
    • G01F11/04G01F11/08
    • Flow control of a shear-sensitive, i.e. pressure gradient degradable, liquid from a high pressure source to a lower pressure discharge is achieved by controlling the liquid's exposure to a degradation pressure gradient. Two displacement chambers are provided and connected by a control conduit. First and second movable barriers in the first and second chambers respectively contain a separate controlling liquid. A pressure and flow control valve is included in the control conduit. Incoming pressurized controlled shear-sensitive liquid flows into the first displacement chamber to displace the first barrier which displaces controlling liquid through the flow control valve. Shear-sensitive liquid is dispensed at relatively lower pressure from the second chamber in response to movement of the second barrier driven by the controlling fluid coming from the control conduit into the second chamber. The flow of controlled liquid to and from the chambers is selectively reversed to provide for continuous pumping from the high pressure source to the low pressure discharge. Indication of total flow and rate of flow of the controlled liquid through the discharge conduit may also be indicated. The flow control valve is adjusted to establish the pressure drop imposed on the controlling liquid and thereby the pressure drop in the controlled liquid without subjecting the controlled fluid to a degradation pressure gradient.
    • 通过控制液体暴露于降解压力梯度,实现了从高压源到低压放电的剪切敏感性,即压力梯度可降解液体的流量控制。 提供两个位移室并通过控制导管连接。 第一和第二腔室中的第一和第二可移动屏障分别包含单独的控制液体。 压力和流量控制阀包括在控制管道中。 进入加压控制的剪切敏感液体流入第一位移室以移动通过流量控制阀移动控制液体的第一屏障。 响应于由来自控制管道的控制流体驱动的第二屏障的移动进入第二室,剪切敏感液体在相对较低的压力下从第二室被分配。 选择性地反向控制液体流出室的流动,以提供从高压源到低压排放的连续泵送。 也可以指示通过排放管道的受控液体的总流量和流量的指示。 流量控制阀被调节以建立施加在控制液体上的压降,从而建立受控液体中的压降,而不使受控流体受到降解压力梯度的影响。