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    • 6. 发明授权
    • Fluid flow-controller with improved diaphragm
    • 具有改进隔膜的流体流量控制器
    • US5295662A
    • 1994-03-22
    • US35209
    • 1993-03-22
    • Michio YamajiKenji Yamamoto
    • Michio YamajiKenji Yamamoto
    • F16K7/16F16K41/12F16K31/50
    • F16K41/12F16K7/16
    • A diaphragm type fluid flow controller comprises a valve body having formed therein an inlet and an outlet passage, the passages communicating with a valve chamber formed in the valve body. The valve chamber is sealed by a flexible diaphragm. A threaded valve stem is rotated by a handle to cause pressure to be applied to the diaphragm to selectively open or close the valve. A stop ring limits movement of the valve stem in the direction of the diaphragm so that the pressure applied to the diaphragm is limited once the valve is closed. The diaphragm comprises a plurality of nested thin metal dome-shaped plates having upturned peripheral edges which are clamped between the stop ring and a rim formed on the valve body at the upper extent of the valve chamber. The plural plates insure air-tightness of the valve chamber because any rotation of the stop ring, resulting from tightening the valve after closure, is not transmitted to the lower-most diaphragm plate. The upturned edges make individual diaphragm plates easier to handle. In addition, plural nested plates may be assembled and inserted into a valve as a unit. The upturned edges of the plates make it easier to grip and remove the plates from a valve in instances where it is desirable to leave the valve in-line during the removal process.
    • 隔膜式流体流量控制器包括形成有入口和出口通道的阀体,所述通道与形成在阀体中的阀室连通。 阀室由柔性隔膜密封。 螺纹阀杆通过手柄旋转,以使压力施加到隔膜以选择性地打开或关闭阀。 止动环限制阀杆在隔膜方向上的移动,使阀门关闭后施加到隔膜上的压力受到限制。 隔膜包括多个嵌套的薄金属圆顶形板,其具有向上翻转的周边边缘,其夹紧在止动环和在阀室的上部范围处形成在阀体上的边缘之间。 多个板确保阀室的气密性,因为由闭合后的阀紧固导致的止动环的任何旋转不会传递到最下面的隔膜板。 上翘的边缘使得各个隔膜板更容易处理。 此外,可以将多个嵌套板组装并插入到作为一个单元的阀中。 板的向上翻转的边缘使得在需要在拆卸过程期间将阀离开的情况下更容易地从阀门夹紧和移除板。