IL33736A - Trickle irrigation systems - Google Patents

Description

IN OKLE IRRIGATION SYSTEMS There are well known irrigation systems of the trickle where the required quantity of water is permitted to trickle from water conduits onto the be it garden part of an orchard or a as is In such arrangements the outlet openings are of various It is known to provide plastic tubes into which small holes have been bored or otherwise It is also known to insert nozzles into the walls of metal or plastic tubes and finally it is known to provide holes within the wall of the water either plastic or and to set therein or otherwise shaped bodies which are provided with slits through which the water can trickle into the All these arrangements suffer from a common the holes or the outlet openings of the models or as the case may be have to be of very small since otherwise too large quantities of water would pass into the open and the whole advantage of the trickle namely the economy in irrigation water would be Wow with these small holes the disadvantage is always present that they become clogged easily after a relatively short period of The water used for irrigation carries impurities and furthermore mineral matter is dissolved therein which settles as a sediment at the edges of the outlet that is to say the abovemen ioned small holes or with the effect that this passage very quickly becomes This not only necessitates a considerable amount of work in cleaning the but also the full closure occurs frequently during a period of irrigation when no attendant is present so that during considerable which might amount to a full day or even no or insufficient irrigation is since no or almost no water can pass through the clogged outlet I have now devised an irrigation system of the trickle type kind which permits the outlet ports of whatever starting from the simple hole in the wall of a plastic and ending with the most sophisticated nozzle may be made large enough so as to prevent a clogging by bodies carried in the water or by According to the present invention the water is permitted to leave the respective conduit not that is to say in a continuous but in a The supply of water and its bein forced to exit through the outlet ports of an irrigation system in a manner can be attained by conventional that is to by supplying it through a pump which feeds the water in pulse spurts into the so that it exits in small or droplets at predetermined intervals of one In that way the quantity of water to be supplied to the given area of orchard or field may b controll d and at the same time the outlet orts obvious advantage in the new system would be clear to all those who are familiar with the problems of trickle irrigation and it will be clear to those people that it is possible to permit the flow of water to the area to be irrigated through larger outlets than had been the case till if the is not a continuous but the egress of water is in a the intervals being or The fact that the water leaves in pulsating each of which is independent of the next one has also a further advantage with the arrival of a spurt at the outlet impurities which might have deposited at the edge of the outlet aperture are away carried by the water escaping the outlet Teets conducted and comparing the operation of irrigation systems with continuous trickle with such accordin to the present with equal have shown that in pulsating trickle systems the time during which water is may be about one tenth of the time during which water trickles from tinuous trickle the ratio of radii of the nozzles bein relating to a nozzle for the conventional trickle while relates to a system according the Thus the radius of an exit nozzle used in a system according to the present invention may be times as large as the one used in a conventional trickle because the nozzles became clogged after a few hours of in the Beisan Valley No such occurance was experienced with the use of the system proposedi insufficientOCRQuality

Claims (1)

WHAT IS CLAIMED ISt

1. Method of irrigating soil characterized thereby that the irrigation water is made to leave the conduits feeding the water to the respective area of ground -in a pulsating trickle, 2, A system for irrigation of a given area of ground comprising the conventional conduits with outlets of any kind and a device of known construction feeding water in a pulse-like manner into the said conduits. COHEN ZEDBK AND SPISBACH P.O. Box 1169 Tel Aviv Attorneys for Applicants.