DROP IRRIGATION APPARATUS Russian patent published in 2007 - IPC A01G25/02 

FIELD: agricultural engineering, in particular, technique for drop irrigation of farm crops.

SUBSTANCE: drop irrigation apparatus has pipeline with discharge openings, means for connecting pipeline to water source under pressure, and tubular drop members with passageway for passage of water through pipeline. Each of said drop members is positioned within pipeline and equipped with at least one water exit part provided at its outer surface, in the vicinity of discharge opening. Each of tubular drop members has thickened portion provided at its wall inner side. Tubular member is equipped with cavity formed in its thickened part and adapted for defining therein of outer and inner walls united through transverse wall. Flexible membrane is disposed within cavity. Outer surface of membrane and surfaces of outer and transverse walls define water discharge adjustment cavity positioned above membrane. Drop member has inlet opening connecting passageway and cavity provided within thickened part with water discharge adjustment cavity, labyrinth channel system having inlet end connected to inlet opening, channel connected to discharge end of said system and connecting through said system inlet opening with water discharge adjustment cavity. Through channel provided within cavity inner wall serves as inlet opening, i.e., it controls movement of membrane and bypasses water flow to pipeline discharge opening. To do that, membrane is positioned so as to regulate inlet opening closing extent and may be moved to limited extent in radial direction relative to drop member. Through channel has flange provided in its portion contacting with membrane and protruding into cavity. Membrane rests upon flange. Water discharge adjustment cavity is additionally provided with space defined by flange, membrane lower surface and transverse wall. Area of water pressure upon membrane is therefore increased to membrane area value. Grid-type filter is positioned at inlet of each inlet opening for preventing drop member from plugging.

EFFECT: increased protection of apparatus from contamination and provision for prophylactic cleaning of apparatus.

6 cl, 3 dwg