VALVE STRUCTURE FOR ACTUATION OF REVERSIBLE PLOUGHS Russian patent published in 2025 - IPC A01B15/00 A01B3/46 F15B1/26 F15B11/15 F15B11/20 F15B13/07 F15B15/14 F16K11/22 

FIELD: agriculture.

SUBSTANCE: valve structure (1) for actuating reversible ploughs comprises first pass (3), made with possibility of fluid communication with pump (P) in first configuration of plough and made with possibility of fluid communication with reservoir (T) in second configuration of plough in reverse mode, and second passage (4), made with possibility of fluid communication with reservoir (T) in first configuration of plough and made with possibility of fluid communication with pump (P) in second configuration of plough in reverse mode; housing, which includes first seat (5) and second seat (6); first connecting passage (7a) for connecting said valve structure (1) with first chamber (10a) of first hydraulic cylinder (10) for levelling the plough in the longitudinal direction and second connecting passage (7b) for connection to second chamber (10b) of first hydraulic cylinder (10); third connecting passage (8a) for connecting valve structure (1) to first chamber (12a) of second hydraulic cylinder (12) for reversing plough and fourth connecting passage (8b) for connecting to second chamber (12b) of second hydraulic cylinder (12); and hydraulic circuit for setting the sequence of operations. Hydraulic circuit for setting the sequence of operations includes first slide (13) installed with possibility of sliding in first seat (5), and second slide valve (14) sliding in second seat (6), wherein first slide valve (13) and second slide valve (14) are configured to control the flow of working fluid between pump (P), first seat (5), second seat (6), first hydraulic cylinder (10), second hydraulic cylinder (12) and reservoir (T), which enables to control actuation of first hydraulic cylinder (10) and second hydraulic cylinder (12) in accordance with the sequence of operations; safety valve (11), made with possibility of fluid communication with first hydraulic cylinder (10) and with second hydraulic cylinder (12), wherein safety valve (11) is configured to determine at least a portion of said sequence of operations; at least first connecting pipeline (20) and second connecting pipeline (21), connecting to each other parts of first seat (5) and second seat (6); third connecting pipe (30), configured to connect second hydraulic cylinder (12) and pump (P) in a first configuration and configured to connect second hydraulic cylinder (12) and reservoir (T) in second configuration in reverse mode; and check valve (31) installed in third connecting pipeline (30) and made with possibility of passage of working fluid medium flow from second hydraulic cylinder (12) into reservoir (3) in the second configuration of the plough in the reverse mode and blocking the flow of the working fluid medium in the first configuration of the plough. Hydraulic circuit for setting the sequence of operations is made so that in the first configuration, when the working fluid medium is supplied to first passage (3), the first slide valve (13) and second slide valve (14) is in an initial operating position such that fluid is supplied through first connecting passage (7a) to first chamber (10a) of first hydraulic cylinder (10) for extending first hydraulic cylinder; when the first hydraulic cylinder (10) is fully extended and the working fluid from its second chamber (10b) does not flow out, first slide (13) and second slide (14) are displaced relative to each other, so that the working fluid is supplied through the fourth connecting passage (8b) into second chamber (12b) of second hydraulic cylinder (12), drawing second hydraulic cylinder (12); when second hydraulic cylinder (12) reaches end of stroke and the working fluid from its first chamber (12a) does not flow out, the first slide valve (13) and the second slide valve (14) are displaced relative to each other, so that the working fluid medium from the pump (P) is supplied through the third connecting passage (8a) into first chamber (12a) of second hydraulic cylinder (12), extending second hydraulic cylinder (12); and when second hydraulic cylinder (12) reaches end of stroke and working fluid from its second chamber (12b) does not flow out, working fluid medium from pump (P) is supplied through the second connecting passage (7b) to second chamber (10b) of the first hydraulic cylinder (10), pulling the first hydraulic cylinder (10) for completion of plough levelling. Hydraulic circuit for setting the sequence of operations is made in such a way that in the second configuration in the reverse mode, when the working fluid medium is supplied to second passage (4), it enters first chamber (12a) of the second hydraulic cylinder (12), wherein at this second configuration step in reverse mode, only said second hydraulic cylinder (12) moves, and then working fluid flowing from second chamber (12b), passes through third connecting line (30) through check valve (31), after which it returns to reservoir (T), and at that, when second hydraulic cylinder (12) reaches end of stroke, safety valve (11) opens and passes the working fluid flowing from the specified second hydraulic cylinder (12) to the first hydraulic cylinder (10).

EFFECT: possibility of easy monitoring and control of plough operation and its efficient use in reverse mode is provided.

15 cl, 24 dwg