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我厂铅烟气制酸工程中使用了30多只Dg300的衬胶球形隔膜阀,在开车过程中发现该种阀门关不死,关闭时产生内漏和外漏,严重影响系统的正常开车。经我们查找原因,发现主要是由于原阀门的隔膜片的密封线结构计设不合理,内外密封线上的密封比压不同,使隔膜片的内外密封线变形不同,使之产生内漏和外漏。原阀隔膜片密封线结构如图1所示,外封线是在阀门装配时由螺栓加预紧力,使密封线
I plant lead-acid gas project using more than 30 Dg300 rubber lining spherical diaphragm valve, found in the process of driving the valve is immortal, resulting in internal leakage and leakage when the closure, seriously affecting the normal driving of the system. We find the reason and found that the main valve diaphragm is due to the irrational design of the seal line structure, seal pressure inside and outside the seal line pressure is different, so that diaphragm diaphragm seal deformation of the different internal and external leakage and external leak. The original valve diaphragm seal line structure shown in Figure 1, the seal line is installed in the valve by the bolt preload, so that the seal line