ROTARY RAINER Russian patent published in 1997 - IPC

FIELD: agriculture; particularly irrigation with multi-support rotary rainers. SUBSTANCE: rainer has stationary support 1 with stationary pipe 2 and rotary elbow 3. Pressure pipeline 4 connected to elbow 3 is positioned on travelling bogies and is provided with sprinkling apparatus. The last bogie is fitted with rainer speed setting device 13 associated with rainer speed change programmer incorporating disk 5 and adjustment valve 8. Disk 5 is secured on stationary pipe 2 and is provided with guide groove 6, which is intended to follow reversed profile of the field along the front of the rainer movement. Adjustment valve 8 is mounted on rotary elbow 3 and is provided with rod 7 interacting with guide groove 6. The rainer has a hydraulic safety system with control pipe 12 connected with drive 11 of hydraulically controlled valve 10, which communicates with pressure pipeline 9 and through adjustment valve 8 with rainer speed setting device 13. This device is made in the form of hydraulically controlled valve mounted in feed pipeline 14 of hydraulic drive 15 of the last bogie and provided with adjustable drain hole 17. EFFECT: improved efficiency of irrigation operations. 3 dwg