UNIT FOR NONCONTACT PULSED INJECTION OF LIQUID FERTILIZER INTO SOIL AND LIQUID FERTILIZER INJECTOR Russian patent published in 1995 - IPC

FIELD: agricultural engineering. SUBSTANCE: working members of unit are mounted to form modules; each module has housing, universal joint coupling on end of drive shaft and service tank connected by low-pressure pipelines with injectors and neighboring tanks. Working member has cylindrical cam with one or two working slots, two bearing units, four injectors secured in units by means of side branch pipes which accommodate two turnable cylinders with twin pistons connected through slots in cylinder walls with axles of taper rollers located in cam slot; working member has also two stops installed on bearing units and two rings installed on rollers for rotation around the axles. Rollers are secured on axles by means of ball supports, centers of support spheres being arranged in middle planes of rings. Housing is secured over contour of bearing units and is connected with adjacent housing over end faces by means of levers. Twin piston consists of two parts. Made in shanks-sliders of piston are through slots which accommodate plain crossmember of taper roller axle. Crossmember is fitted in and hinge-mounted in slots by pins. Cams are installed on drive shaft of unit with displacement in phase relative to each other. If cam with two slots is used, fitted on cylinder is slider with slot engaging with taper roller axle. Slider is coupled either with lever or, through rotating pair, with rod installed in holes of bearing units. Fitted inside housing are cheeks to set taper roller in the middle of slot in slider before driving the roller in one of two slots of cam. Liquid fertilizer injector has body with high-pressure liquid feeding channel, nozzle close in shape to conoid form with cylindrical section, union with ball check valve, spring-loaded plunger with overflow hole and central rod, and stop between valve ball and plunger upper end face. All washed surfaces of injector body and its parts are of dimensions and shape providing forcing out of air into low-pressure liquid feeding system and ensuring against turbulization of high-pressure liquid flow in zone of nozzle inlet hole and building of rarefaction in low-pressure flow. EFFECT: enhanced reliability. 9 cl, 8 dwg