SU917795A1 - System for watering on slopes - Google Patents

Description

(5) GRINDING IRRIGATION SYSTEM

one

The invention relates to agriculture and can be used for irrigation in areas with large slopes.

A well-known irrigation system, including the main, distribution and irrigation pipelines and operating in the mode of pulsed and drip irrigation.

Its disadvantage is the complexity of the design and operation.

A slope irrigation system is known that includes a main, a distribution and two groups of irrigation pipes with water outlets and a device for programmed control of water supply to groups of irrigation pipelines.,

The disadvantages of the known system are the considerable unevenness of the volumes of water poured out of each irrigation pipeline section for each cycle and the complexity of operation.

The purpose of the invention is to simplify the design and operation of the system and reduce energy consumption.

This is achieved by the fact that the software control device is made in the form of a pair of Venturi nozzles placed in one housing, and hydraulic switches made in the form of differential pistons, the large stages of which are connected to the suction part of the Venturi nozzles and the smaller ones to the main pipeline. this in. The main pipeline for alternate supply is installed for each group of pipelines

15 valves with diaphragm hydraulic actuators having return springs installed in one case in the direction of water flow from the main pipeline to the network, and in the other - at a 20 meeting.

FIG. 1 schematically depicts a slope irrigation system with a drip design; in fig. 2constructive scheme of software control; Fig, 3 scheme of the dropper; ya fig. - knotter plunger.

The system includes (Fig. 1) pump station 1, trunk pipeline 2, head valve 3, software control unit k, left 5 and right 6 branches of the distribution pipeline, irrigation groups tpy6onpoBOAOB 7 laid along a number of perennial plantings along the undun plot. Intermittent droppers 8 are mounted on each irrigation piping at regular intervals. The irrigation pipes are terminated by the locks 9.

Intermittent droppers are a valve-outlet and include a detachable body with (SUBMITTING 10 and outlet 11 channels and a branch 12 .. Between channels 10 and 11 there is a flat elastic disk 13 that performs the functions of a reverse valve for water moving along The branch 12 has a non-return valve with a flat elastic disc 14, which serves to communicate the irrigation section with the atmosphere when draining water from it.

The software control unit (FIG.) Has, respectively, on the left and right branches of the distribution pipeline: Venturi nozzles 15 and 16, hydraulic switches 17 and 18, made in the form of differential pistons, valves 19 and 20 with membrane hydraulic actuators. The valve 19 in the submembrane cavity has a return spring 21, which in the neutral position ensures the closure of the closure member. And in the valve 20, the return spring 22 is inserted into the supermembrane cavity, providing, in the absence of pressure, the position of the locking member. Open

The hydraulic actuator of the valve 19 is connected by channels with the left branch of the distribution pipeline through the check valve 23 and with the switch 18. The hydraulic actuator of the valve 20 has the same connections with the right branch through the check valve 24 and with the switch

17

The large stages of the differential pistons of the switches 17 and 18 are p-hydraulically connected respectively

With the constricted part of the nozzles 15 and 16, and; smaller with the main pipeline ..

The system works as follows.

When creating water pressure in the main pipeline (Fig „2), it begins to flow through the open valve 20, the right branch of the distribution pipeline into the irrigation pipelines of the right section of the system. Since the valve 19 before turning on the system -In operation was closed, the flow of water through the nozzle 15 is not

§ will be. Therefore, the pressures in the higher and lower stages of the differential piston of the switch 17 will be the same and equal to the pressure developed by the pump station. Due to this, due to the difference in the areas of the larger and smaller stages, the differential piston will move to the extreme upper position, together with the pressure, the cavity of the hydraulic drive

gate valves 20. The latter will be kept open.

The entire flow rate of the pumping station will flow to the right branch of the distribution pipeline. The differential piston of the switch 18, due to the higher value of pressure in the small stage as compared to the pressure in the larger stage, will occupy the lowest position. Thus, the cavity of the hydraulic drive 19 will be communicated with the drain. This valve will remain closed.

The water entering under the pressure in the irrigation pipelines of the right section, of the system, sequentially fills all sections of the pipelines. At the same time, the air from them is forced out through the dungs (fig.}). In each dropper the disk 13 opens access of water to the next section and closes the channel 11, the disk 14 separates the branch 12 from the atmosphere. When each irrigation pipeline is filled with water, the plunger closes, the flow through the nozzle 16 becomes zero. Therefore, the pressure at the higher and lower stages of the hydraulic switch 18 is equalized and the differential piston of this switch moves to the extreme upper position, together with the valve cavity head pressure. This valve will open and all pumping station flow will now flow into the left branch of the distribution pipeline. The pressure in the constricted portion of the nozzle 15, and therefore in the larger step, of the switch 17 decreases as compared with the pressure in the smaller step. The differential piston will move it to the lowest position, connecting the hydraulic valve of the valve 20 and the right branch of the distribution pipeline with a drain. This valve will close under the action of pressure on the area of the valve stem. In the right branch of the distribution pipeline, a command impulse is formed to trigger the droppers. Under the action of the geodesic head of water in the pipeline sections, the disk 13 (Fig. 1) moves down, opening channel 11 and closing channel 10. Water from the pipeline section overlying the valve-water outlet is poured into the humidification center. In this case, the disk T communicates the upper points of the section with the atmosphere for filling the pipeline with air, which occupies its cavity instead of water. The parameters of the pumping station and the piping network of the system are calculated so that the time it takes for the outlet valves to empty the irrigation piping sections is less than the time required to fill these pipelines. After the sections on the right-hand section of the system are emptied and the fully leriy section is filled, the valve 20 will open and the valve 19 will close. Then the system works automatically. The use of the proposed slope irrigation system increases the utilization rate of pumping power equipment of a pulse-drip irrigation system, due to the successive operation of two groups of irrigation pipelines and the elimination of overproductive discharge of water from the pipeline network during the formation of command pressure pulses in it. In addition, in conditions of increased slopes of the irrigated area, water is uniformly distributed by droppers due to the hermetic separation of the irrigation pipe sections from each other by flat elastic disks. The reliability of the trigger droplets is also increased by clearly forming a command signal at each dropper by connecting the end of each section of the irrigation pipeline to the atmosphere through a non-return valve installed on the branch supply of the channel, and it is possible to irrigate perennial plantations on mountain slopes that have large slopes, where known irrigation mechanization tools are not technically applicable. invention of the slope irrigation system, which includes a main, distribution and two groups of irrigation pipelines with water outlets and a program for controlling the water supply in a certain sequence into groups of irrigation pipelines, which, in order to simplify the design and operation of the system and reduce energy costs, the device control is made in the form of a pair of Venturi nozzles placed in one body and hydraulic switches made in the form of differential pores large steps which are connected to the constricted part of the Venturi nozzles and smaller ones to the main pipeline, while in the main pipeline for alternate supply, for each group of pipelines, valves with membrane hydraulic actuators having return springs installed in one case in the direction of water flow the main pipeline to the network, and in another - towards. Sources of information taken into account during the examination 1. USSR authorial sweep No. 718058, cl. A 01 G 25/02, 1978.. 2. USSR author's certificate №, cl. A 01 G 25/02, 1977.

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FIG. 2

Claims (1)

Claim A slope irrigation system, including a main, distribution and two groups of irrigation pipelines with water outlets and a program25 multi-control device for supplying water in a certain sequence to groups of irrigation pipelines, characterized in that, in order to simplify the design and operation of the system and reduce energy costs, a program control device made in the form of a pair of Venturi nozzles placed in one housing and hydraulic switches made in the form of differential pistons, large steps They are connected to the narrowed part of the Venturi nozzles, and the smaller ones to the main pipeline, while in the 40 main pipeline, valves for each group of pipelines are installed with diaphragm hydraulic actuators having return springs installed in one case 45 in the direction of the water flow from the main pipeline to the network, and in the other - towards.