| 摘要 |
A sprinkler head includes a fixed nozzle; and a rotor plate spaced from the nozzle and mounted for rotation about an axis extending through the nozzle, and mounted for tilting movement about a horizontal axis. The rotor plate has adjacent water distribution grooves therein, selectively alignable with the nozzle, the grooves shaped and arranged to cause the rotor plate to rotate in opposite directions. A flow reaction member is secured to the rotor plate. A first flow channel having a first inlet port is arranged to intercept a stream emanating from one of the grooves aligned with the nozzle, and to thereby divert at least a portion of the stream through the flow channel and onto the reaction member to cause the rotor plate to tilt about the horizontal axis and align the other of the grooves with the nozzle, thereby reversing the rotation direction of the rotor plate. A second flow channel has a second inlet port circumferentially offset from the first inlet port is arranged to intercept a stream emanating from the other of the grooves aligned with the nozzle and to thereby divert at least a portion of the stream through the second flow channel and onto another portion of the reaction member to cause the rotor plate to tilt about the horizontal axis and align one of the grooves with the nozzle, thereby again reversing the rotation direction of the rotor plate. The first and second inlet ports are adjustable to change the arcuate coverage of the sprinkling pattern.
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