| 摘要 |
The irrigator shown has a rotatable boom 1 at the ends of which are angled regions 2. The angled regions 2 are directed on opposite sides of the longitudinal axis of the boom 1 to cause rotation therein when effluent or water is pumped to the boom 1. The regions 2 may have rubber or the like nozzles 3 chosen so that larger pieces of effluent can be pumped therefrom. The boom 1 may be two lengths of galvanised or PVC 50mm pipe joined at the centre by a T-junction 4. The boom 1 is supported by an upper part 5 of an upstand 6. The upper part 5 can rotate relative to the wheeled frame 7 on which it is supported. The part 5 has on the periphery thereof at least one cam surface 8. In the example a single cam is shown. If varying traveling speeds are required then two cams on opposite sides of the part 5 can be included to increase the number of times the cam means operates per revolution of the boom 1 or the teeth on the ratchet wheel can be changed to adjust the speed of revolution of the boom. |
