| 摘要 |
FIELD: agricultural amelioration. ^ SUBSTANCE: drop-forming apparatus has irrigation pipeline provided with elongated drop-forming members having through inner cavity for water passage, and discharge opening provided through irrigation pipeline wall. Elongated drop-forming member has inlet means, channel communicating with through inner cavity of this member, and inlet means provided on outer surface of drop forming member, near the place of arrangement of at least one discharge opening of irrigation pipeline. Channel formed on surface of elongated drop-forming member functions as water pressure reducing throttle. On surface of elongated drop-forming member there are at least two pairs of rigidity ribs, annular cavities between rib pairs, and filter. Channel enabling water pressure reduction in high-pressure cavity is formed as small-coil pitch thread, and channel in medium-pressure cavities is formed as large-pitch coil thread. Filters are located within high-pressure, medium-pressure and low-pressure cavities. Each filter is made from gas-expanded plastics. Elastomer bandage is positioned on outer surface within pressure cavity. Outlet means of elongated drop-forming member has flared opening with flare oriented toward filter. ^ EFFECT: enhanced reliability in operation of drop irrigation system owing to employment of drop-forming apparatus of such design. ^ 1 dwg |
