The utility model relates to a flat gate valve with a compound sealing seat structure, which comprises a valve body, a gate, a valve cover, a valve seat sealing component and a valve stem. The valve cover is fixedly connected with the valve body, the gate is arranged in the valve body and is sealed with the valve seat sealing component; the valve seat sealing component includes a valve seat body and a sealing pressure ring, a main sealing ring and a secondary sealing ring installed on the valve seat body, and a sealing pressure ring and a main sealing ring The ring and the secondary seal ring are arranged from the medium channel outwards in turn; the main seal ring is pressed into the annular hole of the valve seat body by the sealing pressure ring, the outgoing end of the sealing pressure ring and the secondary seal ring is flush, the outgoing end of the main seal ring is higher than the sealing pressure ring, and the material of the main seal ring is rubber. The sealing of the utility model mainly relies on the main sealing ring. When the main sealing ring is damaged, the auxiliary sealing ring and the sealing pressure ring can closely follow the sealing, so that the valve can continue to work, and the sealing performance is more reliable; the rubber ring is used as the main sealing, the sealing ratio is smaller than the pressure, and the rubber material is more wear-resistant, which can improve the service life of the valve.
【技术实现步骤摘要】
复合密封阀座结构平板闸阀
本技术涉及阀门
，尤其涉及复合密封阀座结构平板闸阀。
技术介绍
如图1所示，现有平板闸阀的软密封阀座结构是通过外力，将单一的矩形工程塑料(序号11)压入阀座本体(序号41)，由该工程塑料与闸板(序号2)形成密封副，靠其自身的形变完成密封。现有技术具有以下缺点：①密封结构单一，若本密封材质损坏，则本阀门的密封直接被破坏；②与介质直接接触，容易被冲蚀；③与介质直接接触，容易被介质里的杂质划伤；④容易磨损；⑤密封比压大，不易密封；⑥密封面表面为平面，对密封副的另一表面(即闸板密封面)的质量要求高；⑦工程塑料摩擦系数较大，所以阀门开启力矩较大，导致驱动装置加大，从而使阀门的成本升高。
技术实现思路
本技术旨在提供复合密封阀座结构平板闸阀，当主密封圈损坏时，副密封圈紧跟着密封，从而形成密封双保险。为达到上述目的，本技术采用的技术方案如下：复合密封阀座结构平板闸阀，包括阀体、闸板、阀盖、阀座密封组件和阀杆，阀盖与阀体固...
【技术保护点】
1.复合密封阀座结构平板闸阀，其特征在于:包括阀体、闸板、阀盖、阀座密封组件和阀杆，阀盖与阀体固接，所述闸板设于阀体内并与阀座密封组件密封配合，所述阀杆一端与闸板连接，阀杆另一端穿出阀盖；/n阀座密封组件包括阀座本体和安装在阀座本体上的密封压圈、主密封圈和副密封圈，所述密封压圈、主密封圈和副密封圈从介质通道向外依次设置；主密封圈由密封压圈压紧于阀座本体的环状孔内，密封压圈和副密封圈的冒出端齐平，所述主密封圈的冒出端高于密封压圈，所述主密封圈材质为橡胶。/n
【技术特征摘要】 【专利技术属性】
1.复合密封阀座结构平板闸阀，其特征在于:包括阀体、闸板、阀盖、阀座密封组件和阀杆，阀盖与阀体固接，所述闸板设于阀体内并与阀座密封组件密封配合，所述阀杆一端与闸板连接，阀杆另一端穿出阀盖；
阀座密封组件包括阀座本体和安装在阀座本体上的密封压圈、主密封圈和副密封圈，所述密封压圈、主密封圈和副密封圈从介质通道向外依次设置；主密封圈由密封压圈压紧于阀座本体的环状孔内，密封压圈和副密封圈的冒出端齐平，所述主密封圈的冒出端高于密封压圈，所述主密封圈材质为橡胶。
2.根据权利要求1所述的复合密封阀座结构平板闸阀，其特征在于：所述主密封圈为三角状的橡胶圈。
3.根据权利要求1或2所述的复合密封阀座结构平板闸阀，其特征在于：所述密封压圈和副密封圈材质为工程塑料。
技术研发人员：曾品其，王剑英，童俊，曾和友，杨建超，关玉堂，王新月，
申请(专利权)人：成都乘风阀门有限责任公司，成都成高阀门有限公司，成都乘风流体科技集团有限公司，
类型：新型
国别省市：四川;51
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