Flow control actuator with an adjustable frequency
    4.
    发明公开
    Flow control actuator with an adjustable frequency 审中-公开
    带可调频率的流量控制执行器

    公开(公告)号:EP2722274A3

    公开(公告)日:2017-11-22

    申请号:EP13184675.0

    申请日:2013-09-17

    发明人: Raghu, Surya

    摘要: A method and apparatus comprising a structure (204) and a chamber (210) within the structure (204). The structure (204) has an input port (206) and an output port (208). The chamber (204) is configured to channel a fluid (212) from the input port (206) to the output port (208) of the structure (204). A volume (214) of the chamber (210) is configured to change such that a frequency (216) at which the fluid 212) flows out of the output port (208) changes at the output port (208).

    摘要翻译: 一种方法和装置,包括结构(204)内的结构(204)和腔室(210)。 结构(204)具有输入端口(206)和输出端口(208)。 腔室(204)构造成将流体(212)从输入端口(206)引导至结构(204)的输出端口(208)。 腔室(210)的容积(214)被配置成改变,使得流体212)流出输出端口(208)的频率(216)在输出端口(208)处改变。

    VENT ASSEMBLY AND METHOD FOR A DIGITAL VALVE POSITIONER
    8.
    发明公开
    VENT ASSEMBLY AND METHOD FOR A DIGITAL VALVE POSITIONER 审中-公开
    欧洲数字电视系统

    公开(公告)号:EP3137796A1

    公开(公告)日:2017-03-08

    申请号:EP15724839.4

    申请日:2015-05-01

    IPC分类号: F16K15/14 F16K47/08 F15B21/00

    摘要: A digital valve positioner for use with an actuator. The digital valve positioner includes a housing, at least one exhaust port opening formed in the housing, and a vent assembly operatively coupled to the at least one exhaust port opening. The vent assembly includes a body having a bore, a valve seat surrounding the bore, and a check valve disposed within the bore. The check valve is arranged to shift from a closed position seated against the valve seat to an open position disposed away from the valve seat. A plurality of barriers is disposed around and positioned to enclose the check valve. The plurality of barriers is arranged to prevent an external medium from entering the check valve and to provide a tortuous flow path for the exhaust medium reducing sound through the vent assembly.

    摘要翻译: 一种与执行器一起使用的数字阀定位器。 数字阀定位器包括壳体,形成在壳体中的至少一个排气口开口和可操作地联接到至少一个排气口开口的排气组件。 排气组件包括具有孔的主体,围绕孔的阀座和设置在孔内的止回阀。 止回阀布置成从安置在阀座上的关闭位置移动到远离阀座设置的打开位置。 多个屏障设置在周围并被定位成包围止回阀。 多个屏障布置成防止外部介质进入止回阀并且为排气介质提供曲折的流动路径,从而通过排气组件减少声音。