DROPPER (VERSIONS) Russian patent published in 2006 - IPC A01G25/02 

FIELD: farm crop irrigation equipment.

SUBSTANCE: dropper according to first embodiment has casing with inlet and outlet. Conical adjusting and spherical protecting chambers and channels are provided on internal surface of casing. Channels are formed as axially bisected Laval nozzles. Widened parts of Laval nozzles are facing spherical protective chamber and communicating through axial opening with conical adjusting chamber. Membrane with openings is placed within casing for free movement. Dropper is equipped with upper and lower threaded covers mounted on casing inlet and outlet. Dropper is equipped with additional membrane loosely placed at casing inlet between upper threaded cover and conical adjustable casing chamber. Upper threaded cover equipped with feeding opening has flare equipped with annular edge interrupted with radial slots. Similar slots are provided on annular edge facing flare of conical adjustable chamber. Lower threaded cover equipped with outlet opening has in its cavity annular chamber closed with membrane. Annular chamber is in fluid communication through radial channels formed as axially bisected Laval nozzles via widening parts with spherical protective chamber in lower cover. Annular chamber is axially aligned with outlet opening. On dropper casing internal surface, according to second embodiment, are provided spherical protective chamber and channels formed as axially bisected Laval nozzles. Dropper is equipped with additional membrane and upper and lower threaded covers. Additional membrane is loosely disposed at casing inlet, between upper threaded cover and spherical protecting casing chamber. Main and additional membranes are made equal in size and design. Depth of radial slots is smaller than height of flare in lower cover by 3-5 times. Lower threaded cover is formed ribbed.

EFFECT: increased efficiency and provision for uniform irrigation norms.

6 cl, 4 dwg