IRRIGATION APPARATUS Russian patent published in 1998 - IPC

FIELD: agriculture, in particular, equipment for irrigating crops by discrete supply of water to moisturizing zones. SUBSTANCE: irrigation apparatus has distributing and irrigating pipelines with water outlets, accumulating vessel 6, feeding pipe 7 with valve and working syphon 8 with liquid level pipe-sensor 13 communicated with its suction part 10 to accumulating vessel 6 and with its drain part 12 to distributing pipelines. Pipeline system is formed as unit of separate sections. Drain part of syphon 8 is provided with automatic water flow switch 9 having syphons 17 (air and water gates). Drain part ends 18 of syphons 17 are disposed in cups 19 with outlet branch pipes 20 and joined one to another with their suction parts 21 through collector 22, control chambers 23 hydraulically communicated one with another, automatic water doser 24 and hydraulic channel system 25. Doser 24 provides supplying of water to control chambers 23. Upon termination of irrigation, decreased water pressure in working section urges water to flow from communicating channel 25 and create vacuum in it. As a result, this channel works as syphon to empty control chamber 23 and prepare syphon 17 for operation during following cycle. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 cl, 6 dwg