Large-flow adjustable ratio control valve

The utility model relates to a large-flow adjustable ratio control valve, which comprises a valve body, a valve cap, a valve seat and a driving shaft; a valve seat mounting hole is formed in the valve body; the valve seat is mounted in the valve seat mounting hole; a large valve core is mounted in the valve core mounting hole; the valve cap is fixedly and hermetically mounted on the valve body; a driving shaft is spliced in the valve body and the valve cap; a retainer spring is sleeved on the driving shaft; a pressing sleeve is arranged in the valve chamber of the valve body and mounted above the valve seat; the top end of the pressing sleeve is propped against the bottom end of the valve cap; the bottom end of the pressing sleeve is propped against the upper end surface of the valve seat; the valve core pressing sleeve is connected in the inner hole of the pressing sleeve; the bottom end of the retainer spring is propped against the valve core pressing sleeve; a large valve core hole is formed in the large valve core; the bottom end of the driving shaft is connected with a small valve core; and a drive piece is fixed on the driving shaft. Both the large-flow adjustment and the small-flow adjustment can be realized on the valve body of the control valve, and two original sets of schemes of valves can be completely replaced, so as to save massive investment cost for the enterprise.