SU584826A1 - Dropwise watering system - Google Patents

Description

DROP IRRIGATION SYSTEM

(54)

I

The invention relates to agriculture and can be used for drip orOne, plant.

A drip irrigation system is known, including a main pipeline connected to the dispensers and a water outlet. .

The disadvantage of this system is the dependence of water flow control on the ambient temperature and the complexity of the design.

Also known is a drip irrigation system including a main pipeline. connected to distributors on which water outlets are installed, each equipped with a tensiometric sensor and drainage pipe 2.

The design of the droppers of this system with holes of small size is unsatisfactory and not reliable in operation due to the constant danger of their blockage, and the drop-by release of water significantly reduces the inter-irrigation periods, which worsens aeration

soil.

The aim of the invention is to increase the reliability of the system by reducing the possibility of plugging of the drainage pipes.

g

This is achieved by the fact that each water outlet is made in the form of a spring-loaded diaphragm valve, the submembrane cavity of which is in communication with the drainage tube and distributor, and with the latter through a connecting pipe communicated by a choke with a transmembrane cavity that is connected to the sensor.

The drawing shows a drip irrigation system, a slit.

Claims (2)

The drip irrigation system includes a main pipeline (not shown) with a network of valves 1, at the intersection of which water outlets 2 are installed, made in the form of a spring-loaded valve having two cavities 3 and 4 formed by a membrane 5. Outlet 2 is connected to the distributor 1 by means of a socket 6, the outlet of which is in the cavity 3, is also connected to the drainage tube 7, which is immersed in the soil to the depth of the root zone. The nozzle 6 is connected to the cavity 4 by a channel 8, the outlet of which is blocked by a throttle 9, for example, a needle one. A spring 10 is installed in the cavity 4, which holds the valve 11 in the lower position in the drawing — the outlet nozzle 6: is closed. Through channel 12, using tube 13, cavity 4 communicates with a tensiometric sensor -14, immersed (into the soil. Water from a water supply source enters the main pipeline, distributors 1 and nozzles b. With the throttle 9 open, water from nozzle b is through a channel 8 enters cavity 4, fills it and tube 13, you are confined to the air there, through the porous tip of the sensor; 14., into the ground, after which the throttle .9 closes, and the outlet. soil, due to its capillary properties, absorbs water from the tubes and 13 a tensiometric sensor in which a partial vacuum is formed, with a decrease in the soil moisture content. When the pressure on the valve 11 from the nozzle b side with increasing discharge in the tube 13 exceeds the force of the spring 10, the valve 11 opens and the water from the nozzle 6 through the cavity 3 and the drainage tube 7 enters the root-like layer: the emitting layer forms a wetting zone A, which, increasing, reaches the immersion zone of the porous tip of the tensiometric sensor 14. Under the influence of the vacuum formed in the pipes 13 e, the tip absorbs water from the soil, the tube 13 is filled with water and the pressure in the cavity 4 povashaets. When this pressure is combined with the force of the spring 10 to exceed 1 T water pressure on the valve 11 from the cavity 3 side, the membrane 5 will move the valve 11 to its original position, causing the outlet of the pipe 6 to replenish and the water will cease to flow into the soil until. growing ice; it will not need water again, which will show an increase in discharge: pipe 13, the valve 11 will open again, giving water access to the soil. The proposed drip irrigation system provides a periodic effect of water outlets with maintaining the required moisture of the root layer of the soil depending on the needs of a particular crop, increasing the inter-irrigation periods, which improves soil aeration. The system is economical in water consumption. The absence of small holes in the water outlets prevents clogging droppers. The work of the outlets is local, so it does not depend on the pressure of water in the pipeline. Water outlets will be shut off alternately as they move away from the source of water supply. DETAILED DESCRIPTION OF THE INVENTION The drip irrigation system includes a main pipeline connected to distributors on which vdovyepuski are installed, equipped with a Xi1 each tensiometric sensor and a drainage tube immersed in the soil, so as to increase the reliability of system operation possibilities Drainage tubes are blocked; each outlet is designed as a spring-loaded diaphragm valve, the submembrane cavity of which is in communication with the drainage tube and distributor m, with the latter through a pipe connected by a choke with an overmembrane cavity that is connected to the sensor. Sources of information taken into account in the examination: 1,. Author's certificate of the USSR 412345, cl. A 01 G 25/02, 1972. 2. The patent of France 2133383, cl. A 01 e 25/00, 1972.