HYDROAUTOMATIC VALVE FOR THE CONTROL OF BRANCHES OF DISTRIBUTION PIPES, OF A SPRINKLER IRRIGATION SYSTEM, IN HEAVY LAND

摘要

A hydro-automatic valve with a cylindrical housing mounted vertically and having rigid upper and bottom ring shaped rests between which, within the cylindrical housing, interconnected upper and bottom face closure members are freely disposed. The upper face closure member is shaped as a disc with a hole in the central axis and has small legs arranged around its periphery extending vertically downwards with small teeth turned inwards towards the central axis. The small teeth are disposed freely in a shallow ring shaped groove in the surrounding surface of the bottom face closure member, which is shaped with a conical peak in the axis. At the bottom end of the bottom face closure member there is a deep ring shaped groove. This deep ring shaped groove is connected via parallel channels with the space between the upper and bottom face closure member. The cylindrical housing is connected to a centrally disposed lateral inlet hole and an outlet elbow above the upper ring shaped rest, to the basic distribution piping of the sprinkling irrigation system, and via a chamber with a lateral outlet hole, disposed underneath the bottom ring shaped rest, to the branch piping. In the bottom of the chamber, coaxial to the cylindrical housing, there is mounted a cylinder with a piston pin. The space of this cylinder underneath the piston is connected via a hole to additional control piping of the irrigation system.