| 摘要 |
FIELD: agricultural amelioration, in particular, drop irrigation equipment. ^ SUBSTANCE: drop irrigation system has reservoir with level regulator and feed pipeline with discharge openings. Throttle is mounted within cavity of feed pipeline above each discharge opening. Throttle is formed as sleeve with entrance face provided on its outer surface at its one end and with thermally sensitive petals at its other end. Equally spaced semi-circular grooves provided on outer surface of sleeve are hydraulically communicated with said grooves which are oriented along generatrices on outer surface of sleeve. Grooves have triangular section, with section of each groove reducing in the course of flow of liquid. Circular groove is joined with discharge opening at the side adjoining to entrance face. Thermally sensitive petals are joined with sleeve through semi-circular groove formed on sleeve inner surface. Cuts are formed between adjacent petals. Each of said petals is made in the form of variable-section cantilevered beam in its diametrical plane. Petals have memory of basic geometric shape. Petals are oriented in opposite direction relative to irrigation water feeding direction in feed pipeline. ^ EFFECT: improved quality of irrigation, stabilized water flow rate on changing of environmental temperature and water pressure fluctuations within water mains. ^ 2 cl, 5 dwg
|
