IRRIGATION TUBE FOR DROP IRRIGATION Russian patent published in 2008 - IPC A01G25/02 

FIELD: agriculture.

SUBSTANCE: irrigation tube for drop irrigation, contains channels for water delivery, executed in the form of a labyrinth of the zigzag form, the basic and secondary droppers. The droppers are hydraulically connected by means of the connecting elements established to tops of a zigzag, spaced inlet channels and water releases. Each labyrinth of the zigzag form is executed in the form of the channel with variable hydraulic section. The axial line of the channel on length of the labyrinth is described by the elementary periodic function, for example a sinusoid of the kind y=Asin (ωx+Y), where A - amplitude; ω - frequency; Y - phase, and T=2π/ω-the period; x and at - an absciss and ordinate in the system of orthogonal coordinates XOY. The minimum hydraulic sections of the channel in the form of a hollow circle are executed in points of crossings with an axis of abscisses. The maximum hydraulic sections of the channel have the form of a hollow ellipse - in points of the greatest amplitude.

EFFECT: provides uniform delivery of irrigation norms in each dropper on length of an irrigation tube.

3 dwg