PFF65-140型硬密封圆弧平板闸阀结构改进  

Structure Improvement of the PFF65-140 in the Hard Sealed Circular Gate Valve

作　　者：郑泳[1] 张川[1] 宋振华[1] 杜文波[1] 饶冬[1] 张津[2] 

机构地区：[1]宝鸡石油机械有限责任公司广汉钻采设备厂,四川广汉618399 [2]宝鸡石油机械有限责任公司成都装备制造分公司,成都610051

出　　处：《石油矿场机械》2014年第4期78-81,共4页Oil Field Equipment

摘　　要：PFF65-140型平板闸阀在140MPa超高压力作用下,阀板和阀座表面的硬质合金层经常发生爆裂失效。通过受力分析,原密封结构的比压大于标准值,阀板存在应力集中区,阀座基体的变形大,这些因素是导致其硬质合金层失效的原因。改进了阀板和阀座的结构,使其受力合理;并控制阀座、阀体阀座孔的装配间隙小于0.2mm。经过改进后,该阀的加工工艺简单、制造成本低、强度高、密封可靠,能够满足140MPa井口装置的使用要求。When PFF65-140 gate valve is at 140 MPa ultra-high pressure,its valve plate and seat carbide layer surface frequently burst failure.Through stress analysis,larger specific pressure of previous seal structure than the standard one,the presence of the valve plate stress concentration area,and large deformation seat matrix are the factors that cause its failure carbide layer.The structure of the valve plate and seat is improved,it is made reasonable force.The assembly clear-ance of control valve and its valve seat hole is less than 0 .2 mm.After improvement,the valve is a simple process,low manufacturing cost,high strength,reliable sealing,and meet the requirements of the140 MPa wellhead equipment.

关 键 词：平板闸阀 密封 结构 受力分析 

分 类 号：TE931.102[石油与天然气工程—石油机械设备]