The utility model relates to a new three eccentric double sealing butterfly valve. Including butterfly plate, stem, valve body and outer ring, the stem is fixed to the butterfly plate inside the valve body, the front side of the butterfly plate is equipped with a butterfly plate which is connected with the butterfly plate, and there is a seal ring between the butterfly plate press plate and the butterfly plate. The valve body has a ring convex table on the surface of the valve, and the valve body is equipped with the seat of the front end of the ring convex platform and the outer ring. There is a hoisting ring between the seat and the seat, the outer ring and the inner ring are fixed by screw, the front end of the valve seat is equipped with a step, the PTFE ring is installed on the step, the PTFE ring and the inner ring ring have a pressure plate. The inner diameter surface of the PTFE ring and the inner diameter surface of the seat of the valve seat are sealed and matched with the outer diameter surface of the seal ring to form a seal pair. The utility model has a simple structure. In the environment of bad working condition, it can realize double seal and prolong the service life of the butterfly valve. When the butterfly valve is closed, half of the outer surface of the butterfly plate is in contact with the PTFE ring, and the other half of the outer surface of the butterfly plate is in contact with the seat, thus realizing the double sealing effect.
【技术实现步骤摘要】
一种新型三偏心双密封蝶阀
本技术涉及一种蝶阀,尤其涉及一种新型三偏心双密封蝶阀。
技术介绍
蝶阀又叫翻板阀,是一种结构简单的调节阀,可用于低压管道介质的开关控制的蝶阀是指关闭件(阀瓣或蝶板)为圆盘,围绕阀轴旋转来达到开启与关闭的一种阀。阀门可用于控制空气、水、蒸汽、各种腐蚀性介质、泥浆、油品、液态金属和放射性介质等各种类型流体的流动。在管道上主要起切断和节流作用。蝶阀启闭件是一个圆盘形的蝶板,在阀体内绕其自身的轴线旋转,从而达到启闭或调节的目的。目前,在已知的蝶阀设计中,其密封副结构不外乎两种结构,一种是软密封结构,通常见于中线蝶阀,单偏心蝶阀,双偏心蝶阀。主要是通过金属与橡胶类圈接触,形成密封副;另一种是硬密封结构,通常见于全金属三偏心蝶阀,主要是通过金属对金属接触,形成密封副。但上述两种在一些恶劣工况下,密封效果差,使用寿命短。
技术实现思路
针对上述缺陷,本技术的目的在于提供一种结构简单,在恶劣工况下能够实现双重密封,密封效果好,使用寿命长的一种新型三偏心双密封蝶阀。为此本技术所采用的技术方案是:包括蝶板、阀杆、阀体和外吊环,所述阀杆与内置于阀体内的蝶板固定连接,蝶板前侧设有与其固定连接的蝶板压板,蝶板压板与蝶板之间设有密封环,阀体内表面设有环形凸台,所述阀体内设有卡设在环形凸台前端面的阀座,所述阀体内壁设有位于阀座前侧的环形凹槽,所述外吊环卡设在环形凹槽内,外吊环与阀座之间设有内吊环,所述外吊环与内吊环通过螺钉固定连接,所述阀座前端面设有台阶,所述台阶上安装有PTFE环,所述PTFE环与内吊环之间设有压板,内吊环上设有若干锁紧螺钉,锁紧螺钉下端穿过内吊环与 ...
【技术保护点】
一种新型三偏心双密封蝶阀,其特征在于,包括蝶板、阀杆、阀体和外吊环,所述阀杆与内置于阀体内的蝶板固定连接,蝶板前侧设有与其固定连接的蝶板压板,蝶板压板与蝶板之间设有密封环,阀体内表面设有环形凸台,所述阀体内设有卡设在环形凸台前端面的阀座,所述阀体内壁设有位于阀座前侧的环形凹槽,所述外吊环卡设在环形凹槽内,外吊环与阀座之间设有内吊环,所述外吊环与内吊环通过螺钉固定连接,所述阀座前端面设有台阶,所述台阶上安装有PTFE环,所述PTFE环与内吊环之间设有压板,内吊环上设有若干锁紧螺钉,锁紧螺钉下端穿过内吊环与压板接触,PTFE环内径表面及阀座内径表面与密封环的外径表面密封配合形成密封副。
【技术特征摘要】
1.一种新型三偏心双密封蝶阀,其特征在于,包括蝶板、阀杆、阀体和外吊环,所述阀杆与内置于阀体内的蝶板固定连接,蝶板前侧设有与其固定连接的蝶板压板,蝶板压板与蝶板之间设有密封环,阀体内表面设有环形凸台,所述阀体内设有卡设在环形凸台前端面的阀座,所述阀体内壁设有位于阀座前侧的环形凹槽,所述外吊环卡设在环形凹槽内,外吊环与阀座之间设有内吊环,所述外吊环与内吊环通过螺钉固定连接,所述阀座前端面设有台阶,所述台阶上安装有PTFE环,所述PTFE环与内吊环之间设有压板,内吊环上设有若干锁紧螺钉,锁紧螺钉下端穿过内吊环与压板接触,PTFE环内径表面...
【专利技术属性】
技术研发人员:董侠均,
申请(专利权)人:络科实业集团有限公司,
类型:新型
国别省市:江苏,32
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