The Board of Trustees of the University of Arkansas
发明人:
Christopher G. Henry,Brian Kohler,Jim Nichols
申请号：
US16471699
公开号：
US20190307083A1
申请日:
2017.12.15
申请国别(地区):
US
年份:
2019
代理人:
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.
