| 摘要 |
A land irrigation system in which a continuously traveling sprinkler line is supplied with water from spaced risers mounted on a stationary water supply conduit extending in the direction of the movement of the sprinkler line to continuously supply water to the sprinkler conveyance, carrying a rotating water manifold with three rigid water carrying arms extending from the manifold at 120 DEG to each other for successive connection to water outlet valves on the risers, moves along the water supply conduit. The outlet from the manifold is connected to the inlet of the sprinkler line through a conduit having a swivel joint whereby the manifold and rigid arms can rotate through 360 DEG relative to the inlet of the sprinkler line. The inlet end of each rigid arm has a coupling device for coupling with outlet valve of a riser and for opening and closing the riser outlet valve. One rigid arm is fluidly coupled to the supply line at all times. With one coupling device connected to one riser, movement of the conveyance along supply line can be utilized to cause the manifold and rigid arms to rotate around the connected riser and also relative to the conveyance to bring another coupling device into contiguity with the next riser in the direction of conveyance travel. The manifold and sprinkler swivel connection move away from and toward the stationary supply conduit to accommodate the length of the rigid arm as it rotates around the connected riser.
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