(57) Abstract:Usage: to determine the values of the potential of soil moisture, which is necessary to water the plants specific cultures, intended for use in gardens, vegetable gardens, greenhouses, etc., the inventive indicator watering contains a water-filled transparent housing 1 is hermetically connected at the bottom with a porous probe 2, and in the upper part of the tube 3. In the inner cavity of the housing 1 is located a float 7 meter limits potential moisture for plant specific crops. Indicator watering immersed in the soil (patch) to the depth of the greatest mass of the roots of this culture and leave to achieve equilibrium between the moisture in the soil and water in the indicator. Signal for irrigation is the ascent of the float 7 to sector scale 4 whose color is the symbol of this culture. Watering is done until the moment of immersion of the float 7 beyond the scale 4. 1 C.p. f-crystals, 2 Il. The invention relates to measurement devices, and more particularly to devices for measuring the capacity of moisture in dispersed and porous materials such as soils, and is intended to define the timing and dose of p is the resolution equilibrium between the moisture in the soil and water in the internal cavity of the device, i.e. the measurement time.In Fig. 1 shows a General view of the indicator of irrigation in the section, Fig. 2 given a float in the section.Indicator watering contains transparent housing 1 is hermetically connected at the bottom with a porous probe 2, and the upper part is equipped with a tube 3 and a discrete multi-color scale 4.In the inner cavity 5 of the housing 1 is fixed perforated partition 6, above which is located a float 7 meter limits potential moisture containing float 7 air film 9, and is provided in the lower part of the suspension 10, consisting of several weights 11 mounted on the flexible strands 12. The distance between the weights is equal to the intercept of discrete scales.The number of weights is determined by the number of measured values of potential moisture.Indicator of irrigation works in the following way.When immersing the porous probe 2 into the soil to a depth of location of maximum root mass of plants of a particular culture "sucking power" soil (potential moisture) tends to pull water from the internal cavity 5, creating it a reduced pressure (relative to atmospheric), which causes an increase in the volume of the float 7 meter at the expense of expanding liwayway (Archimedean) power, acting on the float 7, increases with increasing volume of float (low pressure), which leads to step up depending on the number of lifted weights 11 (total mass).The mass of the weights 11 are selected in such a way that the ascent of the float 7 occurs at pressures corresponding to the limiting values of potential moisture for specific crops, color-coded on a discrete scale 4.When watering the pressure in the cavity 5 is increased due to the receipt of water from the soil 10 in the cavity 5, which leads to a stepwise immersion of the float 7.The indicator watering only one float variable volume with suspension ensures its ascent with less than the prototype of the volume of water released to the soil from the device that at restricted speed, leak requires less time required to establish equilibrium state (measurement time) than using megapopular meter. 1. Indicator of irrigation, including water-filled transparent case, in the lower part of the tightly coupled with porous probe, and the closed top of the tube, and placed in the enclosure perforated septum, which is a POH with Vozvraschenie mass from top to bottom, the float is made with possibility of change of volume when the pressure in the housing, wherein the housing has in the upper part of the discrete multi-color scale, and weights secured to associated with the float meter flexible strands at distances from each other corresponding to the intercept of discrete scales.2. The indicator p. 1, characterized in that the number of divisions of the scale determined by the number of measured values of potential moisture.
FIELD: irrigation systems used for automatic watering of plants on restricted area plots.
SUBSTANCE: apparatus has accumulating vessel with bottom opening closed with valve, auxiliary vessel, two float valves, one of float valves being adapted for supplying of water into accumulating vessel and other float valve being adapted for cutting-off water supply. Valve floats are arranged in auxiliary vessel disposed below accumulating vessel bottom and connected by means of flexible pipes with hermetically sealed vessels provided with porous bottoms deepened into soil. When water is sucked through porous bottoms into soil, water level in auxiliary vessel is lowered and float valves are opened, with water being delivered into accumulating vessel through one of float valves. When predetermined water level is reached, valve for discharge opening is opened, water is supplied into low-pressure irrigation system and is further delivered through second float valve into auxiliary vessel. As a result, water level in auxiliary vessel is increased to cut-off water supply into accumulating vessel.
EFFECT: increased efficiency and simplified construction.