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    • 5. 发明申请
    • FLAPPER VALVE
    • 翻盖阀
    • US20160273306A1
    • 2016-09-22
    • US14661702
    • 2015-03-18
    • John L. BernardMichael L. Hair
    • John L. BernardMichael L. Hair
    • E21B34/10
    • E21B34/06E21B2034/005
    • A flapper valve includes a valve body having a hinge member. A flapper is pivotally mounted to the valve body through the hinge member. At least one of the valve body and the flapper includes a multi-stage valve seat. The multi-stage valve seat includes a first sealing zone and a second sealing zone that is distinct from the first sealing zone. The first sealing zone is configured to provide pressure containment at the valve body when the flapper is exposed to a first pressure and the second sealing zone is configured to provide pressure containment at the valve body when the flapper is exposed to a second pressure that is greater than the first pressure.
    • 挡板阀包括具有铰链构件的阀体。 挡板通过铰链构件枢转地安装到阀体。 阀体和挡板中的至少一个包括多级阀座。 多级阀座包括与第一密封区不同的第一密封区和第二密封区。 第一密封区被配置为当挡板暴露于第一压力时在阀体处提供压力容纳,并且第二密封区被构造成当挡板暴露于更大的第二压力时在阀体处提供压力容纳 比第一个压力。