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    • 1. 发明申请
    • GATE VALVE ACTUATOR AND METHOD
    • 门阀执行器和方法
    • WO2009104072A1
    • 2009-08-27
    • PCT/IB2009/000285
    • 2009-02-18
    • VETCO GRAY SCANDINAVIA ASGRIMSETH, TomKJØNIGSEN, TomBORCHGREVINK, ChristianFLIDH, Jon
    • GRIMSETH, TomKJØNIGSEN, TomBORCHGREVINK, ChristianFLIDH, Jon
    • F16K31/04F16K31/00E21B34/06
    • F16K3/0254F16K31/56
    • A gate valve actuator is disclosed, comprising a stem (4) which is movable linearly in an actuator housing (10) connectable to the gate valve, the stem acting on the gate valve to shift the gate valve between open and closed positions, respectively, wherein the stem (4) is driven by a motor in a first direction into a steady state operation position, and in said position the stem is biased in a second opposite direction towards a shutdown position by means of a spring member (14) acting on the stem (4). According to the invention, a trigger mechanism (22; 25; 29) is arranged for holding the spring member in a compressed state, the trigger mechanism comprising an electrically controllable trigger (22) which is arranged for release of the spring member (14) in result of de-energizing the electrically controlled trigger (22). A method for shifting a gate valve between a steady state operation mode and a shutdown mode by means of the gate valve actuator is also disclosed.
    • 公开了一种闸阀致动器,其包括杆(4),其可在可连接到闸阀的致动器壳体(10)中线性运动,杆作用在闸阀上以分别在打开位置和关闭位置之间移动闸阀, 其中所述杆(4)由电动机沿第一方向驱动进入稳态操作位置,并且在所述位置中,所述杆通过作用在所述杆(4)上的弹簧构件(14)朝着关闭位置朝向关闭位置的第二相反方向 茎(4)。 根据本发明,触发机构(22; 25; 29)被布置成用于将弹簧构件保持在压缩状态,触发机构包括一个可电气控制的触发器(22),其被布置成用于释放弹簧构件(14) 结果导致电控触发器(22)断电。 还公开了一种通过闸阀致动器在稳态操作模式和关闭模式之间移动闸阀的方法。