| 摘要 |
<p>A liquid flow regulator (10) has a housing (11, 12) including an axial bore (13), an inlet (14), an outlet (15) and a plurality of axial grooves (17) opening endwise of the inlet (14) and laterally of the housing (11, 12) into the bore (13). The grooves (17), which have different axial lengths, taper axially so that the cross-sectional area of each groove (17) gradually decreases from the inlet (14) to nothing at a point where the groove (17) merges with the bore (13). An elastomeric sock (19) fits within the bore (13). A plunger (21, 22) for expanding the sock (19) radially outward into sealing engagement with the housing (11, 12) adjacent the bore (13) is axially movable within the bore (13). Flow through the grooves (17) and the bore (13) is regulated by the axial position of the plunger (21, 22) and the minimum cross-sectional area of the tapered, axial grooves (17) at the axial location where the sock (19) seals the bore (13). Axial adjustment of the plunger (21, 22) sequentially opens and closes passage from the grooves (17) through the bore (13) to the bore outlet (15). The upper end of the plunger (21, 22) is provided with threads (49 for engagement with internal threading (50) in a passageway so that rotation of the plunger (21, 22) adjusts its axial position for control of the flow. The connection between the plunger and passageway threads is flexible so that the threads can be flexed out of engagement with each other when it is desired to axially and non-rotatively move the plunger to quickly place the regulator in a fully open or fully closed condition. </p> |
