公开(公告)号：US20190307083A1

公开(公告)日：2019-10-10

申请号：US16471699

申请日：2017-12-15

申请人： The Board of Trustees of the University of Arkansas

发明人： Christopher G. Henry ,  Brian Kohler ,  Jim Nichols

IPC分类号： A01G25/02 ,  A01G25/06

摘要： A gravity irrigation system includes a distribution piping having apertures to distribute water to a field, and a valve located upstream of the distribution piping. The valve is configured to limit a pressure of the water being delivered to the distribution piping. The system also includes a sump configured to receive the water at a lowest elevation of the field, a depth sensor disposed within the sump, and a return pump disposed at least partially within the sump and configured to move the water to an elevated portion of the field. The system also includes a motor configured to drive the return pump, and a power source coupled to a variable frequency drive. The variable frequency drive is configured to power the motor and control a motor speed proportionately to an indication of the depth sensor. The system also includes a transfer piping coupled to an outlet of the return pump to bring the water from the return pump to a check valve and from there to the distribution piping at a low pressure side of the valve.

公开(公告)号：US11178828B2

公开(公告)日：2021-11-23

申请号：US16471699

申请日：2017-12-15

申请人： The Board of Trustees of the University of Arkansas

发明人： Christopher G. Henry ,  Brian Koehler ,  Jim Nichols

IPC分类号： A01G25/02 ,  A01G25/06 ,  E02B13/00 ,  H02S10/40 ,  H02S20/30 ,  F16K1/22 ,  F16K37/00

摘要： A gravity irrigation system includes a distribution piping having apertures to distribute water to a field, and a valve located upstream of the distribution piping. The valve limits a pressure of the water being delivered to the distribution piping. The system also includes a sump to receive the water at a lowest elevation of the field, a depth sensor disposed within the sump, and a return pump disposed at least partially within the sump to move the water to an elevated portion of the field. The system also includes a motor to drive the return pump, and a power source coupled to a variable frequency drive that powers the motor and controls a motor speed proportionately to an indication of the depth sensor. The system also includes a transfer piping to bring the water from the return pump to a check valve and to the distribution piping.