| 摘要 |
FIELD: irrigated farming. SUBSTANCE: this system can be used for serving land plots adjacent to house and in greenhouses. Automatic moisture regulator has lever 4 and its one arm is connected to moisture content sensor, and other - to a weight. Axle of lever is located below its center of gravity. Moisture content sensor is made in the form of vessel 1 filled with soil taken from irrigated plot. Soil contained in vessel is connected with irrigated soil by means of filters 2, therefore soil contained in vessel has same moisture content as irrigated land plot. Vessel is vertically movable in chamber 3. Position of lever depends on mass of vessel: at moisture content below value preset by setter 7, lever inclines rightward, and at moisture content equal to preset value, it inclines leftwards. Lever operating through rocker 10 controls shut-off member 14: with lever inclined rightward, shut-off member is open, at leftward incline, it is closed. Shut-off member has no intermediate positions. Regulator is very simple in design and reliable. EFFECT: high efficiency. 2 cl, 2 dwg |
