The utility model relates to a long-life liquefied natural gas metering valve, which comprises a solenoid circuit assembly, a valve assembly, a flow adjustment assembly, etc. the valve assembly comprises a valve core, a valve plug and a valve seat, wherein the valve plug is provided with a valve core mounting hole and a center hole, the valve core mounting hole is connected with the bottom end of the valve core, the bottom end face of the valve plug is matched with the sealing plane at the top of the valve seat; the valve plug has a The end face of the bottom end is also provided with a counterbore, which forms a stepped installation hole with the central hole, and a sealing rubber sleeve with the shape consistent with the stepped installation hole is installed in the stepped installation hole. The sealing plane at the top of the valve seat is successively provided with coaxial sealing rings I and II from the outside to the inside; the valve seat is also provided with an overflow chamber at the position corresponding to the central hole of the valve plug, and a plurality of gas flow metering holes are arranged between the sealing rings I and II. The utility model can extend the service life of the product and improve the sealing performance by reducing the sealing structure formed by the valve body back pressure double ring valve seat and the sealing rubber sleeve on the valve plug. The utility model has a wide application range and is easy to popularize and use.
【技术实现步骤摘要】
长寿命液化天然气计量阀
本技术涉及一种计量阀,特别是一种长寿命液化天然气计量阀。
技术介绍
液化天然气是一种优质清洁的化石能源,在国民经济中具有十分显著的应用价值。现有用于计量的喷射式计量阀,其阀塞与阀座之间是通过金属平面密封。但由于液化天然气(LNG)燃料没有自润滑特性,金属平面密封面存在巨大的摩擦,以至于这种计量阀的寿命比较短,而且还存在气体容易泄漏的不足之处。
技术实现思路
本技术要解决的技术问题是:提供一种长寿命液化天然气计量阀,以解决现有技术存在的寿命短、容易泄漏的不足之处。解决上述技术问题的技术方案是:一种长寿命液化天然气计量阀,包括电磁回路组件、阀门组件、流量调整组件和壳体,所述的阀门组件包括阀芯、阀塞、阀座,所述的阀塞内设有同轴的阀芯安装孔和中心孔,阀芯安装孔与阀芯的底端端部连接,阀塞的底端端面与阀座顶端的密封平面相配合;其特征在于:所述阀塞的底端端面还设有沉孔,该沉孔与中心孔形成台阶状安装孔,台阶状安装孔内安装有形状与台阶状安装孔相吻合的密封橡胶套。本技术的进一步技术方案是:所述阀座顶端的密封平面由外向内依次设有同轴的密封环Ⅰ、密封环Ⅱ,该密封环Ⅰ、密封环Ⅱ均为圆环状凸起;阀座在对应阀塞中心孔的位置还设有减少背压的过流腔,在密封环Ⅰ、密封环Ⅱ之间均设有多个气体流量计量孔。本技术的再进一步技术方案是:所述的气体流量计量孔为弧形孔。由于采用上述结构,本技术之长寿命液化天然气计量阀与现有技术相比,具有以下有益效果:1.寿命长由于本技术包括 ...
【技术保护点】
1.一种长寿命液化天然气计量阀,包括电磁回路组件(1)、阀门组件(2)、流量调整组件(3)和壳体(4),所述的阀门组件(2)包括阀芯(21)、阀塞(22)、阀座(23),所述的阀塞(22)内设有同轴的阀芯安装孔(221)和中心孔(222),阀芯安装孔(221)与阀芯(21)的底端端部连接,阀塞(22)的底端端面与阀座(23)顶端的密封平面相配合;其特征在于:所述阀塞(22)的底端端面还设有沉孔(223),该沉孔(223)与中心孔(222)形成台阶状安装孔,台阶状安装孔内安装有形状与台阶状安装孔相吻合的密封橡胶套(224)。/n
【技术特征摘要】
1.一种长寿命液化天然气计量阀,包括电磁回路组件(1)、阀门组件(2)、流量调整组件(3)和壳体(4),所述的阀门组件(2)包括阀芯(21)、阀塞(22)、阀座(23),所述的阀塞(22)内设有同轴的阀芯安装孔(221)和中心孔(222),阀芯安装孔(221)与阀芯(21)的底端端部连接,阀塞(22)的底端端面与阀座(23)顶端的密封平面相配合;其特征在于:所述阀塞(22)的底端端面还设有沉孔(223),该沉孔(223)与中心孔(222)形成台阶状安装孔,台阶状安装孔内安装有形状与台阶状安装孔相吻合的密封橡胶套...
【专利技术属性】
技术研发人员:唐凤君,黎艺文,
申请(专利权)人:柳州源创电喷技术有限公司,
类型:新型
国别省市:广西;45
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