原文：
　　1.使用不锈钢波纹管截止阀安装在船舶动力装置的管路上，在使用过程中阀门发生了阀杆处泄漏和阀杆锈死等问题，虽经修复。但问题反复出现。经过分析故障原因，采取了适宜的解决方案，消除了故障，确保了阀门的性能。

　　2.问题分析 　　不锈钢波纹管截止阀泄漏一般分为内漏和外漏两种情况，蝶阀引起泄漏的原因较多。内分泌一般是因数液体介质中含有固体杂质破坏密封面引起失效。结合现场使用情况分析，出现阀杆外漏的原因主要与阀门结构、工作环境及使用操作方式有关。 2.1结构阀杆采用波纹管及填料双重密封结构，截止阀波纹管与内衬环及外衬环焊接成波纹管组件，再与阀杆及导向体焊接，阻断介质通过阀杆向外渗漏。阀杆上下的移动距离平键Ⅰ向上运动，直至平键Ⅰ的上端面与下填料的下端面接触。由于下填料采用的是PTFE材料，材质，若过度开启阀门，将导致平键Ⅰ嵌入填料，阀门再无法开启和关闭，并撞死波纹管组件，造成介质沿阀杆处泄漏。波纹管的拉伸长度及压缩量是根据阀门的行程确定的，如果超过极限拉伸或压缩，则有可能损坏波纹管，球阀造成小编管破裂，密封失效。因此需要增加阀门开启及关闭的限位装置，使得阀门启闭过程中，波纹管一直在设计范围内伸缩。2.2工作环境波纹管截止阀的工作环境恶劣也是造成其故障的一个原因。 由于安装于船体内的波纹管截止阀长期工作于盐雾环境内，而且上部常有凝水滴落，造成上部推力球轴承腐蚀，严重时，导致与阀杆接触性腐蚀2.3操作在使用中如果过度开启或关闭波纹管截止阀，则可能导致阀门不能满足有关性能要求。过度关闭阀门时，则有可能压坏密封面，导致阀门再次使用时密封失效。过度开启阀门时，则可能操作波纹管组件，造成阀门外漏。

　　3.改进 　　经过分析阀门存在的问题，对其结构、止回阀操作及环境进行了改进。首先是增加平键Ⅰ的限位福利费，将PTFE材料的下填料询问增加一个厚3㎜的不锈钢填料垫，以防止填料变弄脏及对阀杆限位。 在阀门关闭时，如果出现阀门无法截流时，不应加大力强制关闭，而是开启阀门，用流体冲刷一段时间后再次关闭，反复再次，如仍无法关闭，应检查研磨密封面。在阀门开启时，当阀门开启到一定高度，阀杆遇到小的阻力后，闸阀尽量不要继续强制开启，以延长阀杆及其密封组件的寿命啊。阀杆上部带有推力球轴承的截止阀，在安装时，要尽量避免有凝结水直接滴落于阀门户口本导致阀杆锈蚀的位置。

 　　4.结语 　　波纹管截止阀改进后，没有再次发生波纹管拉裂、阀杆锈死及外漏等故障，使用情况良好。

“ Cut-off valve, stainless steel bellows Fault Analysis and Treatment ”是由中国截止阀网提供的阀门新闻，译文仅供参考。另外，中国截止阀网还提供相关产品搜索： 波纹管截止阀、 更多截止阀产品、 气动管路截止阀(仪表截止阀)、 更多截止阀产品、 截止阀价格。

译文：
           1. Using stainless steel bellows valve installed in the ship power plant in the pipeline, in the course of the valve stem Department leak occurred and stem rust and other issues, despite repair. But the problem recurring. After analyzing the reasons of failure to take the appropriate solution, to eliminate the problem and ensure that the valve performance. 2. Problems Stainless steel bellows valve leakage is Plug Valvesgenerally divided into leakage and leakage in both cases, the reasons causing more leakage. Endocrine factor of the liquid medium is usually solid impurities contained in the sealing surface damage caused by failure. Combination of on-site usage analysis, leakage occurs because the main stem and the valve structure, working conditions and the use mode of operation. 2.1 The structure of valve stem and the packing of double bellows seal structure, bellows and liner ring and outer ring welded bellows liner components, and then with the valve stem and guide body welding, block the media out through the valve stem leakage. Stem up and down movement from flat keys Ⅰ upward movement until the upperReducing Valves end flat key Ⅰ and lower end contacts the next filling. As the next filler material used is PTFE, the material, if the over-the valve is opened, will lead to flat keys Ⅰ embedded in fill, the valve can not be opened and closed again, and killed bellows components, causing media leakage along the stem Department. Bellows stretching length and compression volume is determined according to the trip valve, if more than ultimate tensile Safety valves or compression, you may damage the bellows, causing Xiaobian tube rupture, seal failure. Therefore need to increase the valve opening and closing of the stopper, and makes the process of opening and closing valves, bellows have been designed within the scope of expansion. 2.2 The working environment bellows globe valve of the working environment is one of the reasons causing the failure. As installed in the vessel bellows globe valve body long-term work in the salt spray environment, and the upper part of condensate water dripping often, resulting in corrosion of the upper thrust ball bearings, serious, leading to corrosion of contact with the stem of 2.3 operations in use if excessive open or close the bellows globe valve, the valveBalance Valves may result in not meeting the performance requirements. Over-close the valve, then the sealing surface may be crushed, resulting in seal failure when the valve again. Open the valve over time, it may operate bellows components, resulting in valve leakage. 3. Improved After analysis of valve problems, its structure, operation and environment was improved. The first is to increase the limit welfare benefits flat key Ⅰ, the PTFE material under the packing asked to add a 3 mm thick stainless steel filler cushion to prevent the fill material change dirty and the stem spacing. In the valve closed, if not closureAPI Cast Steel Valves of the valve, should not be added to vigorously enforce closed, but open the valve with fluid again after a period of time washed off, repeated again, if still unable to close, should check the ground sealing surface. In the valve open, when the valve opens to a certain height, the stem after the encounter little resistance, so as not to force open, to extend the life of the stem and the sealing component ah. Upper stem with thrust ball bearing valve, when installed, to try to avoid condensate dripping directly on the valve stem rust account the location of the lead. 4. Conclusion Improved bellows globe valve, bellows no recurrence of crack, such as stem rust and leakage fault, use good.

原文来源：http://www.1jiezhifa.com/

2010-08-25 07:01

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