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

FIELD: agricultural amelioration, in particular, drop irrigation of gardens, vineyards, vegetables in protected and open ground, early ripening potato, vine crops, flowers, berry-fields and like plantations for repletion of human wants.

SUBSTANCE: drop irrigation apparatus has irrigation pipeline with elongated drop-forming members positioned within pipeline and provided with through inner water passage cavity and discharge opening formed through irrigation pipeline. Irrigation pipeline has at least one discharge opening at its one end, said opening being closed with screw-type stopper. Other end of pipeline is equipped with means for connection to water source under pressure, such as nipple of distribution pipeline in drop irrigation system. Preliminarily purified water is fed into irrigation pipeline under pressure of at least 0.02 MPa. Drop-forming member has inlet means, channel communicated with through inner cavity of said member, outlet means formed on outer surface of said member, at site of arrangement of at least one discharge opening of pipeline. Channel is designed for reducing water pressure. At least two pairs of rigidity ribs, annular cavities between pairs of rigidity ribs, and filter are provided on surface of drop-forming member. Open zigzag-shaped pressure reducing channel is provided on cylindrical surface of drop-forming channel, between its middle rigidity ribs. Pipeline wall, inner rigidity ribs and cylindrical surface of drop-forming member define high-pressure circular cavity. End parts of said channel are placed through cuts in middle pair of rigidity ribs, on cylindrical surfaces in adjacent pairs of rigidity ribs. Ribs define average-pressure cavities on drop-forming member surfaces. Filters positioned within average-pressure and high-pressure cavities are formed as hollow cylinders of gas-expanded plastics, which embrace cylindrical surfaces of drop-forming member. Outer surface of filter set within high-pressure cavity adjoins elastomer bandage. Each average-pressure cavity is hydraulically communicated with aligned discharge opening of pipeline in low-pressure cavity. Low-pressure cavities are defined by outer pairs of rigidity ribs which are provided with air gates. Outer diameter of rigidity ribs on surface of drop-forming member exceeds inner diameter of irrigation pipeline by 1.02-1.06 times.

EFFECT: increased efficiency and enhanced reliability in operation.

4 cl, 8 dwg