초록 ▼

An average speed spinner water drive system for a center pivot irrigation system has a first group of sprinklers spaced along the main conduit which are continuously on, and a second group of pairs of sprinklers, each pair having an associated spinner drive which is sequenced on to drive the system.

An average speed spinner water drive system for a center pivot irrigation system has a first group of sprinklers spaced along the main conduit which are continuously on, and a second group of pairs of sprinklers, each pair having an associated spinner drive which is sequenced on to drive the system. By sequencing sprinklers in combination with spinner drives, applicant\s average speed system delivers an amount of water which is directly proportional to the speed of the system through the field. Each support tower is provided with a totally mechanical and hydraulic alignment control for sensing when it is behind the next outermost section of conduit and sequencing on its spinner drive to bring it into alignment. A percentage timer is used to set the speed of the system and thus the amount of water applied to the field. The percentage timer has a hydraulic motor turning a shaft with two individually adjustable cams to operate hydraulic start and stop valves. An overwatering timer mounted on the next to outermost support tower measures the time delay between “on”intervals of the master spinner drive and stops the system if the delay exceeds a predetermined period. The overwatering timer includes a cylinder with a free floating piston and water is applied to opposite ends of the cylinder with a mechanically operated valve at one end to shut off the system when the piston is driven to that end.

대표청구항 ▼

A center pivot irrigation system comprising a main conduit, a plurality of sprinklers spaced along the conduit for applying water to a field, a plurality of support towers spaced along said conduit, a spinner drive at each support tower for powering its associated support tower and the conduit, each

A center pivot irrigation system comprising a main conduit, a plurality of sprinklers spaced along the conduit for applying water to a field, a plurality of support towers spaced along said conduit, a spinner drive at each support tower for powering its associated support tower and the conduit, each spinner drive having at least one associated sprinkler, means to control each spinner drive and its associated sprinkler so that said associated sprinkler is sequenced on whenever the spinner drive is off, each spinner drive and its associated sprinkler having a sufficient water delivery so that the portion of field irrigated by each spinner drive and sprinkler combination receives substantially the same application of water as other portions of the field being irrigated.