The utility model relates to an eccentric butterfly valve, in particular to a three eccentric butterfly valve with a valve shaft seal. The utility model comprises a valve body, a pressing plate, a sealing ring, a butterfly plate, a pin, a valve shaft, an upper shaft sleeve, an upper dust ring, a lower dust ring and a lower shaft sleeve; the upper shaft sleeve and the lower shaft sleeve are installed on the valve body, and the valve shaft are installed on the upper shaft sleeve and the lower shaft sleeve; the upper dust ring is located under the upper shaft sleeve, and the valve body is provided with an upper groove which is matched with the upper dust ring, and the upper dust ring is placed in the upper groove, and the upper dust ring is installed on the upper groove Between the valve shaft and the valve body, the lower dust ring is located above the lower shaft sleeve, the valve body is provided with a lower groove which is suitable for the lower dust ring, the lower dust ring is placed in the lower groove, and the lower dust ring is installed between the valve shaft and the valve body; the butterfly plate is fixed on the valve shaft through the pin, the pressing plate is pressed on the butterfly plate, and the sealing ring is arranged between the pressure plate and the butterfly plate. The valve shaft of the utility model is sealed to prevent the valve shaft from being stuck, ensure the sealing effect of the three eccentric butterfly valve, and improve the service life of the three eccentric butterfly valve.
【技术实现步骤摘要】
一种阀轴密封的三偏心蝶阀
本技术涉及偏心蝶阀,尤其涉及一种阀轴密封的三偏心蝶阀。
技术介绍
阀杆轴心同时偏离碟片中心及本体中心,且阀座回转轴线与阀体通道轴线有一定角度的,称为三偏心蝶阀。由于蝶板的回转中心(即阀轴中心)与蝶板密封截面存在一个偏心蝶板的回转中心(即阀轴中心)与阀体中心线存在一个偏心,在将阀座中心线与阀体中心线形成一个偏心角,使得蝶阀在启闭过程中,蝶板的密封面在开启瞬间立即脱离阀座密封面,而在关闭瞬间才会接触并压紧阀座密封面。当完全开启时,两密封面之间形成一个与双偏心密封蝶阀相同间隙,彻底消除了两密封面之间磨损。现有的三偏心蝶阀阀轴没有密封,经常出现阀轴卡死的情况,阀轴卡死后不能转动,严重影响了偏心蝶阀的密封效果。
技术实现思路
为了克服上述现有技术的不足,本技术提供一种阀轴密封的三偏心蝶阀,对阀轴进行密封,避免阀轴卡死,保证了三偏心蝶阀的密封效果,提高了三偏心蝶阀的使用寿命。为了达到上述目的,本技术采用以下技术方案实现:一种阀轴密封的三偏心蝶阀,包括阀体、压板、密封圈、蝶板、销、阀轴、上轴套、上防尘环、下防尘环与下轴套;所述上轴套与下轴套安装在阀体上,阀轴安装在上轴套与下轴套上;上防尘环位于上轴套下方,阀体上设有与上防尘环适配的上凹槽,上防尘环放置于上凹槽内,上防尘环安装在阀轴与阀体之间,下防尘环位于下轴套上方,阀体上设有与下防尘环适配的下凹槽,下防尘环放置于下凹槽内,下防尘环安装在阀轴与阀体之间;蝶板通过销固定在阀轴上,压板压在蝶板上,压板与蝶板之间设有密封 ...
【技术保护点】
1.一种阀轴密封的三偏心蝶阀,其特征在于:包括阀体、压板、密封圈、蝶板、销、阀轴、上轴套、上防尘环、下防尘环与下轴套;所述上轴套与下轴套安装在阀体上,阀轴安装在上轴套与下轴套上;上防尘环位于上轴套下方,阀体上设有与上防尘环适配的上凹槽,上防尘环放置于上凹槽内,上防尘环安装在阀轴与阀体之间,下防尘环位于下轴套上方,阀体上设有与下防尘环适配的下凹槽,下防尘环放置于下凹槽内,下防尘环安装在阀轴与阀体之间;蝶板通过销固定在阀轴上,压板压在蝶板上,压板与蝶板之间设有密封圈。/n
【技术特征摘要】
1.一种阀轴密封的三偏心蝶阀,其特征在于:包括阀体、压板、密封圈、蝶板、销、阀轴、上轴套、上防尘环、下防尘环与下轴套;所述上轴套与下轴套安装在阀体上,阀轴安装在上轴套与下轴套上;上防尘环位于上轴套下方,阀体上设有与上防尘环适配的上凹槽,上防尘环放置于上凹槽内,上防尘环安装在阀轴与阀体之间,下防尘环位于下轴套上方,阀体上设有与下防尘环适配的下凹槽,下防尘环放置于...
【专利技术属性】
技术研发人员:刘小光,何威,陈乃坤,
申请(专利权)人:鞍山瑞科阀门制造有限公司,
类型:新型
国别省市:辽宁;21
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