| 摘要 |
<p>Fluid distribution systems such as underground sprinkling systems using orifices as flow regulators limit the system to a relatively small range of fluid pressure variation and tend to become blocked by foreign particles. Here a fluid flow regulating valve is inserted in line with a fluid conducting medium to regulate the flow therethrough over a widely varying range of pressure differentials across the valve. The valve is constructed of a body portion (48) having a fluid passageway therethrough terminating at one end in a land (56) having an empirically derived, compound curved section. A compliant reed (58) is affixed to the body portion adjacent the land and operates to press against and conform with the land in response to increasing fluid pressure differential across the reed whereby the rate of fluid flow through the valve remains substantially constant. In an alternative embodiment of the invention, a second similarly shaped land is provided adjacent the reed and opposite the other land to provide bidirectional flow control. The lands are integral portions of the body portion of the valve which is constructed of molded plastic or the like. The reed comprises thin metal shimstock or the like which has been heat staked to the body portion. </p> |
