The invention belongs to a sealing structure, in particular to an all metal elastic sealing ring for a hard sealing butterfly valve. The utility model relates to an all metal elastic sealing ring for a hard sealing butterfly valve, which comprises a valve body, a valve rod is arranged in the internal cavity of the valve body, the valve rod is fixed in the valve body through a butterfly plate, and the elastic arc sealing ring contacts with the inner wall of the sealing surface of the valve seat of the valve body. The remarkable effect of the application is that the whole all metal sealing ring is adopted to eliminate the interlayer of flexible graphite, so as to avoid the erosion and loss of flexible graphite caused by the pipeline medium; the sealing ring extends an arc-shaped elastic lip with a thickness of 3mm \u2011 5mm, so that the sealing ring has better elasticity and is easy to form good sealing performance; the circular arc of the elastic lip is toward the large end of the sealing cone of the valve seat The direction is extended so that the medium pressure can act on the inner side of the elastic lip arc, and the medium pressure can be used to increase the sealing force and enhance the sealing effect.
【技术实现步骤摘要】
一种硬密封蝶阀用全金属弹性圆弧唇密封圈
本专利技术属于密封结构,具体涉及一种硬密封蝶阀用全金属弹性密封圈。
技术介绍
三偏心硬密封蝶阀在双偏心(见图1中的A和B)的基础上将阀座中心线与阀体中心线斜置,形成一个偏心角(见图1中的C),并在阀瓣密封面上配合一个相应的几何形状设计,使阀瓣在90°开关转动行程中,密封圈与阀座之间完全无任何磨擦,阀门关闭后,由阀杆扭矩在密封圈与阀座之间形成密封比压,从而保证阀门严密关闭。三偏心蝶阀在0°-90°开启过程中,密封圈会在开启的瞬间脱离阀座密封面,而其在90°-0°关闭过程中,只有在关闭的瞬间,密封圈才会接触并压紧阀座密封面。三偏心蝶阀启闭时蝶板密封面相对于阀座密封面是渐出脱离和渐入压紧,消除了两密封面之间的机械磨损和擦伤。阀瓣密封圈一般采用多层金属夹柔性石墨的结构方案,从而综合了硬密封(金属)和软密封(柔性石墨)的优点,既使三偏心硬密封蝶阀具备高温应用条件,又具备良好的密封性能。但其缺点也比较明显,其中的柔性石墨在运行过程中容易受介质冲刷流失,使得密封性能难以保证。 ...
【技术保护点】
1.一种硬密封蝶阀用全金属弹性密封圈,包括阀体(1),阀体(1)的内部空腔处设置阀杆(3),阀杆(3)通过蝶板(7)固定在阀体(1)内部,其特征在于:阀瓣密封圈采用圆弧形的弹性圆弧密封圈(5),该弹性圆弧密封圈(5)与阀体(1)的阀座密封面(4)内壁接触。/n
【技术特征摘要】
1.一种硬密封蝶阀用全金属弹性密封圈,包括阀体(1),阀体(1)的内部空腔处设置阀杆(3),阀杆(3)通过蝶板(7)固定在阀体(1)内部,其特征在于:阀瓣密封圈采用圆弧形的弹性圆弧密封圈(5),该弹性圆弧密封圈(5)与阀体(1)的阀座密封面(4)内壁接触。
2.如权利要求1所述的一种硬密封蝶阀用全金属弹性密封圈,其特征在于:弹性圆弧密封圈(5)的圆...
【专利技术属性】
技术研发人员:李军业,彭新英,吴辉,
申请(专利权)人:中核苏阀科技实业股份有限公司,
类型:发明
国别省市:江苏;32
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