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    • 7. 发明专利
    • Trunnion loaded ball valve having flexible valve seat
    • 带有柔性阀座的TRUNNION负载球阀
    • JP2011033189A
    • 2011-02-17
    • JP2010173109
    • 2010-07-30
    • Valbart Srlヴァルバルト ソシエタ ア レスポンサビリタ リミタータValbart S.R.L.
    • SEVESO ALBERTOIVANESCU GABRIEL
    • F16K5/06
    • F16K5/0673
    • PROBLEM TO BE SOLVED: To provide a trunnion loaded ball valve capable of guaranteeing sealing performance for both sides of a ball even if this ball valve is in the situation being equivalent to difference in pressure being equal to the maximum rated pressure of the valve.
      SOLUTION: This trunnion loaded ball valve is constituted in such a way that at least either of head parts of valve seat rings 36, 38 has at least one annular groove 66 directed in the radial direction for a long axis A and the annular groove 66 stores a backup ring 70. The backup ring 70 is connected with an elastic preload element provided among the valve seat rings 36, 38 and the backup ring 70 to give elastic force being parallel with the long axis A. The elastic preload element acts on two opposing corner sectors of the backup ring 70. Respective corner sectors are symmetrical with respect to a diameter axis of the backup ring 70 crossing the rotary axis B orthogonally.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了提供一种能够确保球的两侧的密封性能的耳轴式球阀,即使该球阀处于等于压差的情况等于最大额定压力的情况 阀。 解决方案:该耳轴负载球阀构成为使得阀座环36,38的头部中的至少一个具有沿径向指向长轴A的至少一个环形槽66,并且环形 凹槽66存储支撑环70.支撑环70与设置在阀座环36,38和支撑环70之间的弹性预加载元件连接,以产生与长轴A平行的弹性力。弹性预加载元件作用 在支撑环70的两个相对的角部分上。相应的拐角部分相对于支承环70的直径轴线对称,该直径轴线正交于旋转轴线B。 版权所有(C)2011,JPO&INPIT