System for opening and closing outlets of irrigation pipe comprises casing mounted on pipe with outlets in its upper surface containing spring buckle attached to piston rod which carries seal for outlets

摘要

The system for opening and closing the water outlets (4) of an irrigation pipe (1) comprises a tubular case (2) mounted on the pipe. This has outlets (5) in its upper surface and contains a spring buckle (6) attached to a piston rod (8) with piston and cylinder units (9, 10) at each end. The buckle carries a curved seal (7) for the outlets.