The utility model relates to a novel inverted sealing butterfly valve. The lower valve comprises a valve body, and a butterfly plate is fixedly connected with the butterfly plate under the stem and built into the valve body, the valve body is provided with a support bracket is arranged on the upper end of the driving seat, a transmission seat is provided with a worm with each other, middle part of the bracket is provided with a hollow cavity, is arranged in the support on the valve stem through the upper and lower ends of the upper stem. Connected with the worm wheel, on the lower end of the valve rod is connected with the upper end of the valve rod, the lower end of the bracket is provided with a through hole, the filler is arranged between the upper stem and the inner wall of the through hole, the upper end is provided with a filler in the packing gland cavity through hole, the lower end of the bracket are arranged in the stepped hole, step ladder hole on the lower end is provided with a conical surface. The stem is provided with a conical table with a conical surface, a transmission seat is arranged on the bottom surface of the fan-shaped slope step, fan-shaped slope with fan-shaped slope step the lower end is provided with a worm. The utility model has the advantages of simple structure, effectively preventing the penetration of the particles in the medium, protecting the valve stem and the stuffing, and improving the service life of the valve stem and the stuffing.
【技术实现步骤摘要】
一种新型倒密封蝶阀
本技术涉及一种蝶阀,尤其涉及一种新型倒密封蝶阀。
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。在目前已知的蝶阀设计中,阀杆和阀体及填料之间的设计基本是配合设计,阀体及填料与阀杆之间的配合存在着或大或小的间隙,那么在一些介质为颗粒状的场合,尤其是当介质的最小颗粒尺寸比阀杆和阀体及填料之间的间隙小时,颗粒就容易从间隙渗透,从而颗粒在阀杆上堆积,时间长了,颗粒堆积严重,会在阀杆转动时磨损阀杆和填料,减小阀杆及填料的使用寿命。
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,有效防止介质中的颗粒渗入,保护阀杆和填料,提高阀杆和填料使用寿命的一种新型倒密封蝶阀。为此本技术所采用的技术方案是:包括阀体、下阀杆和蝶板,所述下阀杆与内置于阀体内的蝶板固定连接,所述阀体上端设有支架,所述支架上端设有传动座,所述传动座内设有相互配合的蜗轮蜗杆,所述支架中部设有空腔,所述支架内设有贯穿其上下两端的上阀杆,所述上阀杆与蜗轮连接,所述上阀杆下端与下阀杆上端连接,所述支架下端设有通孔,所述上阀杆与通孔上端内壁之间设有填料,所述填料上端设有位于空腔内的填料压盖,所述支架下端的通孔内设有阶梯孔,所述阶梯孔内的台阶处设有锥面,所述上阀杆的下端设有 ...
【技术保护点】
一种新型倒密封蝶阀,其特征在于,包括阀体、下阀杆和蝶板,所述下阀杆与内置于阀体内的蝶板固定连接,所述阀体上端设有支架,所述支架上端设有传动座,所述传动座内设有相互配合的蜗轮蜗杆,所述支架中部设有空腔,所述支架内设有贯穿其上下两端的上阀杆,所述上阀杆与蜗轮连接,所述上阀杆下端与下阀杆上端连接,所述支架下端设有通孔,所述上阀杆与通孔上端内壁之间设有填料,所述填料上端设有位于空腔内的填料压盖,所述支架下端的通孔内设有阶梯孔,所述阶梯孔内的台阶处设有锥面,所述上阀杆的下端设有与锥面相配合的锥形台,锥形台的锥面与台阶处的锥面形成锥面密封副,所述传动座的底面设有扇形坡度台阶,所述蜗轮下端面设有与扇形坡度台阶相配合的扇形斜面。
【技术特征摘要】
1.一种新型倒密封蝶阀,其特征在于,包括阀体、下阀杆和蝶板,所述下阀杆与内置于阀体内的蝶板固定连接,所述阀体上端设有支架,所述支架上端设有传动座,所述传动座内设有相互配合的蜗轮蜗杆,所述支架中部设有空腔,所述支架内设有贯穿其上下两端的上阀杆,所述上阀杆与蜗轮连接,所述上阀杆下端与下阀杆上端连接,所述支架下端设有通孔,所述上阀杆与通孔上端内壁之间设有填料,所述填料上端设有位于空腔内的填料压盖,所述支架下端的通孔内设有阶梯孔,所述阶梯孔内的台阶处设有锥面,所述上阀杆的下端设有与锥面相配合的锥形台,锥形台的锥面与台阶处的锥面形成...
【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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