The invention discloses a full-size eccentric semi ball valve, comprising a valve body, rotating hemisphere, is arranged in the valve body cavity flow; flow cavity in the rotating hemisphere; the rotating hemisphere in the upper and lower ends are respectively connected with the upper and lower valve; the other end of the valve cover is connected by the sleeve and the valve; the valve cover is connected to the valve body; the lower stem connected through the sleeve and the valve stem is connected; and a transmission mechanism; the rotary body is provided with a spherical hemisphere; the water outlet end is provided with a valve seat; the valve seat is provided with a soft seal; when rotating the hemispheres and the flow chamber is closed, spherical cap and valve seat with the formation of hard seal and soft seal contact area; spherical soft sealing zone formation. The invention has the advantages of simple structure, good sealing performance, long service life; can achieve the dual soft seal, effectively improve the seal performance, seal and soft seal zone is arranged on the seat body is added to the exit direction of the floating ring, realize reverse sealing.
【技术实现步骤摘要】
一种全通径偏心半球阀
本专利技术涉及球阀领域,尤其涉及到一种全通径偏心半球阀。
技术介绍
目前球阀的缺点是:阀门体积大,不能满足复杂的工况,对于管道的要求较大,而且易发生变形,密封效果下降,寿命低,而且维修不便,成本较高,而且在工程使用中出现关闭不到位,容易泄露的现象。专利申请号为201310721894.9,名称为一种全通径偏心半球阀,技术方案为包括阀体以及安装在该阀体内的阀杆、阀座和半球形的阀芯,所述阀体的两侧面分别设置有进口端和出口端,在所述阀体的进口端安装有接管,该接管内端面与阀体进口端端面连接,所述阀体进口端的内壁上设置有一圈限位台阶,所述阀座安装在接管内端与在限位台阶之间,所述接管将阀座紧压在所述限位台阶上,在全通径偏心半球阀关闭时,所述阀芯的球面紧压在阀座内圈上。此全通径偏心半球阀的密封结构为软密封结构,软密封结构容易发生变形,密封效果差。专利申请号为201210083091.0,名称为一种无独立阀座上装式全通径偏心半球阀,其特征在于,包括:阀体、球冠、偏心曲轴、上轴、阀盖、下轴、密封圈、阀座,所述一种无独立阀座上装式全通径偏心半球阀,在阀体设有阀座,所述阀座与阀体联为一体,所述阀座焊接于阀体上,或堆焊于阀体上,或喷焊于阀体上,所述一种无独立阀座上装式全通径偏心半球阀,在偏心曲轴上设有球冠,所述球冠上设有密封圈,所述密封圈是硬密封或软密封,所述偏心曲轴的轴线偏离阀门流道的中心线并且不相交,通过上轴的旋转,带动偏心曲轴旋转,所述偏心曲轴带动球冠旋转,从而球冠或球冠上的密封圈与阀座形成密封,此技术的密封结构为软密封结构,软密封结构容易发生变形,密 ...
【技术保护点】
一种全通径偏心半球阀,其特征在于:包括阀体(5)、旋转半球体(7),所述阀体(5)内设有流腔(51);所述旋转半球体(7)位于流腔(51)内;所述旋转半球体(7)的上下两端分别连接有上阀杆(11)和下阀杆(3);所述上阀杆(11)的另一端通过上轴套(12)与阀盖(1)相连接;所述阀盖(1)连接于阀体(5)上;所述下阀杆(3)通过下轴套(6)与阀体(5)相连接;所述旋转半球体(7)相对于阀体(5)可转动;所述上阀杆(11)与传动机构相连接;所述旋转半球体(7)上设有球冠(71);所述阀体(5)的出水端设有阀座(9);所述阀座(9)上设有软密封(92);当旋转半球体(7)与流腔(51)呈关闭状态时,球冠(71)与阀座(9)相接形成硬密封区(72);球冠(71)和软密封(92)相接形成软密封区(73);所述阀座(9)与阀体(5)之间设有浮动环(2),所述浮动环(2)可在反向压力的作用推动阀座(9)向球冠(71)的密封面推进,使阀座(9)与球冠(71)的密封面保持一个密封比压,实现反向密封。
【技术特征摘要】
1.一种全通径偏心半球阀,其特征在于:包括阀体(5)、旋转半球体(7),所述阀体(5)内设有流腔(51);所述旋转半球体(7)位于流腔(51)内;所述旋转半球体(7)的上下两端分别连接有上阀杆(11)和下阀杆(3);所述上阀杆(11)的另一端通过上轴套(12)与阀盖(1)相连接;所述阀盖(1)连接于阀体(5)上;所述下阀杆(3)通过下轴套(6)与阀体(5)相连接;所述旋转半球体(7)相对于阀体(5)可转动;所述上阀杆(11)与传动机构相连接;所述旋转半球体(7)上设有球冠(71);所述阀体(5)的出水端设有阀座(9);所述阀座(9)上设有软密封(92);当旋转半球体(7)与流腔(51)呈关闭状态时,球冠(71)与阀座(9)相接形成硬密封区(72);球冠(71)和软密封(92)相接形成软密封区(7...
【专利技术属性】
技术研发人员:李胜利,许林坡,方中旺,郑敬德,洪良狮,许宗华,
申请(专利权)人:胜利阀门有限公司,
类型:发明
国别省市:福建,35
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