| 摘要 |
FIELD: agricultural amelioration, in particular, drop irrigation equipment. ^ SUBSTANCE: drop-type water outlet has casing with upper and lower communicating chambers equipped with float-type valves. Casing is provided with inlet and outlet apertures. Float-type valve of upper chamber is made in the form of cylinders having different diameters and joined with one another. Upper thin cylinder is manufactured from material having initial shape memory, for example from fluoroplastic sheet. Lower thick cylinder is manufactured from elastic gas-expanded plastic such as polyurethane. Float-type valve of lower chamber functioning as thermal compensator is made in the form of closed elastic cavity wherein flexible member made in the form of compression spring is positioned between oppositely arranged rings. Spring is manufactured from heat-sensitive steel. Float-type valves of both chambers are joined to one another and are positioned for axial displacement within casing cavity. ^ EFFECT: increased efficiency by providing uniform delivery of irrigation water norms during the entire irrigation season. ^ 3 cl, 2 dwg |
