原文：
           连杆蝶阀是蝶阀的一种结构形式，主要应用于冶金高炉热风炉系统的管道中，它具有体积小，重量轻，动作灵活，拆装方便等优点。因此，视镜连杆蝶阀在热风炉系统的空气、煤气、烟气等介质管道中得到了广泛应用。

 　　连杆蝶阀的结构特点　　连杆蝶阀的结构如图1所示，它主要由驱动装置、法兰阀板、阀体、主轴、杆系等零部件组成。阀门的启闭是靠驱动装置驱动主轴带动杆系机构运动，从而实现阀板的打开和关闭。通过图1可以看出，无论阀门在开启还是关闭的时候，阀板及其连动部件始终是在介质的包围之中。当阀门关闭时，阀板要承受介质的所有压力，这样就会引起阀板的塑性变形，进而使其连动件引起变形；当阀门开启时，阀板又会受到介质的冲刷，管接头以及介质流动所引起的阀板本身的振动，这样同样会加快连动部件的损坏，尤其是铰接处固体自润滑轴承的损坏。因此，连杆蝶阀阀板的寿命也就是连杆蝶阀的寿命。

 　　连杆蝶阀阀板的结构分析　　根据连杆蝶阀阀板的结构特点，加工制造时一般不采用铸造结构，传统阀板主要采用焊接的形式，如图2所示，阀板上两立板采用钢板直接下料，大圆钢板下料后需要热压成形，压出一定弧度，然后与立板焊接，最后进行机加工。

　　从工艺角度对此种结构的阀板进行分析，从图2中可以看出，过滤器阀板由三部分组成：立板、垫板、大圆钢板。如果采用此种结构的阀板，垫板和立板可以直接下料成形，而大圆钢板则需要工艺人员首先算出下料尺寸，然后再按要求的弧度做出压形胎具，用胎具将大圆钢板压制成形，最后与其他两件组对焊接。而主要问题就出在制造压形胎具这一步，通过图2可以看出，阀板中心部分为弧形，边缘是一平面，安全阀这就需要每做一个规格的阀门，就要做一种胎具，否则不能压出所需要的形状。这无形之中就增加了企业的制造成本。

　用有限元技术对这种结构进行分析，如图3所示是在dn1700连杆蝶阀传统结构阀板上加0.4mpa压力时的分析结果，可以看出整个阀板最大变形处在两立板上，此时发生的最大变形为1.69mm，这样会使与阀板相连的销轴和轴套受到很大的损坏。如图4所示是热风炉冷风管道的dn1700冷风阀的损坏情况(冷风管道压力为0.47mpa，温度为350℃)，该阀门损坏原因是与阀板相连的销轴变弯，销轴处自润滑轴承被完全挤碎。

“Link Optimization Butterfly Valve Plate ”是由中国蝶阀网提供的阀门新闻，译文仅供参考。另外，中国蝶阀网还提供相关产品搜索： 衬胶蝶阀 、 金属密封（硬密封）蝶阀、 通风蝶阀 、 陶瓷蝶阀 、 更多蝶阀产品、 蝶阀价格 等。

译文：
           Butterfly valve butterfly valve is a rod structure, mainly used in metallurgy blast furnace stove system, pipeline, it has a small, light weight, flexible, and easy disassembly. Therefore, the linkageCast Gate, Globe, Check Valves system, the air valve in the stove, gas, smoke and other media channels have been widely applied. Link structural characteristics of butterfly valves Linkage butterfly structure shown in Figure 1, which mainly drives the valve plate, valve body, spindle, bar system composed of such components. Open and close the valve spindle is driven by drive rod drive mechanism motion system to achieve the valve plate to open and close.Ball Valves Can be seen by Figure 1, both valves open or closed when the valve plate and even the moving parts is always surrounded by the media. When the valve is closed, the valve plate to bear all the pressure medium, which could lead to valve plate of plastic deformation, and thus to cause deformation of linked documents; when the valve opens, the valve plate will be under the media's erosion, and medium flow caused by the vibration of the Forged Gate, Globe, Check Valvesvalve plate itself, it will speed up the linked parts of the same damage, in particular solid self-lubricating bearing hinge Office of damage. Therefore, the connecting rod butterfly valve rod is lifespan butterfly life. Linkage analysis of butterfly valve plate structure Butterfly valve plate according to link structural characteristics of manufacturing is generally not used when casting structure, the traditional valve plate mainly in the form of welding, as shown in Figure 2, valve plate steel directly by the two boards under legislation expected, the large circular plate under After the need for hot forming material, press a certain arc, and then with the stand plate welding, the final machined. From the technology point of view the structure of the valve plate of such analysis can be seen from Figure 2, valve Resilient Seated Gate Valvesplate consists of three parts: vertical plate, plate, large circular plate. If the valve plate with such a structure, plate and stand directly under the plate forming, and large circular plate technology staff will need to first figure out the sizes of materials, and then required to make pressure arc-shaped mold, with a tire tool to large circular plate compaction, and finally with the other two groups on the welding. The main problem lies in the manufacture of pressure-shaped mold this step can be seen by Figure 2, the valve plate central part of the arc, the edge of a plane, which needs to be a specification of each valve, they do a kind of tire tool, can not press out the required Automatic Control Valvesshape. This is invisible on the increase among the enterprises manufacturing costs. Using finite element analysis of this structure, shown in Figure 3 is a conventional structure in dn1700 link butterfly valve plate when the pressure increases 0.4mpa results of the analysis, we can see that the maximum deformation of the valve plate in the two legislative panels on the maximum deformation occurs at this time for the 1.69mm, it may lead to valve plate connected with the pin and sleeve are very much damaged. Figure 4 shows the cold stove pipe valve damage dn1700 cold (cold air pipe pressure 0.47mpa, temperature is 350 ℃), because the valve damage associated with the valve plate bent pin, Pin Department self-lubricating bearings are completely burst.

原文来源：http://www.1diefa.com/

2010-08-25 06:53

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