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    • 65. 发明公开
    • BALL VALVE
    • KUGELVENTIL
    • EP3143314A1
    • 2017-03-22
    • EP15722540.0
    • 2015-05-15
    • Fjell Subsea Products AS
    • STRAND, AsbjørnKARLSEN, Kristian
    • F16K5/20F16J3/04F16K5/06
    • F16K5/06B23P15/001F16J3/047F16K5/0689F16K5/0694F16K5/201F16K5/207Y10T29/49426
    • Disclosed herein is a bellow (102,103) for use in a ball valve (101), the bellow comprising: a metallic seat at an end of the bellow for providing a contact surface with a ball (104) of a ball valve; and a metallic body integral with the seat; wherein the metallic body has a longitudinally elastic property such that, when the bellow is in use in a ball valve and the bellow is arranged within the housing (108) of the ball valve so that it is always under longitudinal compression, substantially only the compression in the bellow causes the seat to apply a sealing force against the ball (104) of the ball valve that maintains a mechanical seal between the seat and the ball valve. Advantageously, embodiments allow a new design of ball valve that maintains a high standard of performance in subsea environments over long time periods.
    • 本文公开了一种用于球阀的波纹管,波纹管包括:在波纹管的端部处的金属座,用于提供与球阀的球的接触表面; 以及与座椅成一体的金属体; 其中金属体具有纵向弹性,使得当波纹管在球阀中使用时,波纹管布置在球阀的壳体内,使得其总是处于纵向压缩状态,基本上仅在波纹管中的压缩 使得座椅对球阀的球施加密封力,其在座椅和球阀之间保持机械密封。 有利地,实施例允许在长时间段内在海底环境中保持高标准性能的球阀的新设计。