SU959695A1 - Water-actuated time relay of sprinkling plant water feeding switch - Google Patents

Description

one

The invention relates to agriculture and can be applied in irrigated agriculture to automatically activate and deactivate sprinklers.

A device known as a “two-chamber metering device containing two rigidly connected and non-communicating storage chambers mounted on a common swing axis is known. For for increasing the accuracy of liquid metering, each chamber has one free weight placed in the damping fluid, and for emptying the chamber there are siphon drain devices 1.

The disadvantage of this design is the presence of two alternately open chambers, two mobile loads, damping liquids and siphons, which significantly complicate and reduce reliability. In the field, open cameras are clogged with plant and other debris, which leads to clogging of siphons and disrupts their operation. In addition, the frequency of overturning accumulative chambers depends on the pressure and flow rate in the supply network, and, therefore, as a switch of the sprinklers, this structure cannot be used, since the pressure along the pipeline is different, and each sprinkler should work one and the same 5 preset time.

The closest to the invention to the technical essence is a software switch water supply, including

10, two asymmetric tilting containers, mounted on a water supply stand, communicated with it and equipped with adjustable water outlets 2. The disadvantage of this device is that the filling time is asymmetric

15 tanks depends on pressure fluctuations in the pressure network, which are unavoidable when using pumping stations in irrigation with sprinkling with a large extent of the irrigation network, as well as with complex

20 terrain, t due to this program operation cycles. The switch is unstable in time, which leads to uneven irrigation of the floor area. In addition, the presence of open asymmetric containers, which are clogged in field conditions, leads to clogged drain holes and disrupts the operation of the device. The aim of the invention is to provide switching cycles stable in time and independent of pressure fluctuations in the pressure network, as well as improving the reliability of the operation of the sprinklers during operation. The goal is achieved by the fact that the tanks, the lower of which is connected to the stand through the water supply switch, are fixed to the stand by means of swing axes placed one above the other, while the tanks are mounted in a vertical plane with the possibility of docking at. overturning the upper tank through the water outlets. FIG. 1 is a schematic diagram of the water actuation, its time relay; in fig. 2 is a diagram of a water time relay for odd sprinkler installations; in fig. 3 - the same for even settings. Water actuation, its time relay includes upper tilting asymmetric tank 1, lower closed tilting asymmetric tank 2, exhaust jets 3, adjustable holes 4, water inlet-outlet, made in the form of a funnel 5, overflow valve 6 of the upper tank, bypass plug switch 7 of the lower tank even-numbered installations, bypass plug valve of the switch 8 of the lower capacity of even and odd-numbered installations, nipple 9 leading to the installation, and supporting the sprinkler. The water relay operates as follows. Water from a closed network under pressure quickly fills the upper tank 1. After filling, it overturns into the working position (in Fig. 1), shutting off the water supply with a tap 6. When the upper tank is tilted, water flows with a small flow from the upper tank through the drain hole 4 and the receiving water outlet 5 into the lower tank 2. Lower, command, the tank at this time is in the initial position, the bypass valve of the switch 8 is open. At odd installations at this time, water from the relay through pipe 9 enters and presses on the diaphragm, the stem of which holds a special valve open, and the sprinkler is working. Even-numbered installations are turned off at this time, because the supply of water to the diaphragm in them is controlled by the bypass valve of the switch 7 (Fig. 3), which is closed at the initial position of the lower container and water does not flow to the diaphragm. After a certain time adjustment, the lower container fills and moves to the working position (Figs. 2 and 3). At that, the valve of the switch 8 is closed, shutting off the water supply to the upper tank of all installations, and V odd ones - closing the water supply to the control diaphragm as well. The odd settings are turned off. In even-numbered installations, the tap of the switch 8 is also closed, but the nozzle 9, which supplies water to the diaphragm, is located on the other side and is operated by the tap of the switch 7, which, when the lower container overturns, opens into the working position, water begins to flow through nozzle 9, and even settings are included in the work. They continue to water until water runs out of the lower tank. Then the lower tank returns to its original position, and the upper tank has already occupied this position earlier, but has not been filled, since switch 8 was closed (and the cycle repeats). In order to equalize the filling time and emptying time of the lower container, the openings 4 and the water outlet-water intake 5 are made adjustable. The upper tank is filled in 1.0-1.5 minutes (depending on the pressure in the pipeline), and it is always emptied at the same initial pressure equal to the height of the water layer in the tank at atmospheric pressure. Thus, the lower command tank which is filled from the top, at any pressure in the pipeline, is filled in ONE and the same time. The time required to drain water from the lower tank with the help of adjustments of the opening 4 and the water inlet-outlet 5 is equal to the time it is filled, i.e. the emptying time of the upper tank with regard to its filling and, therefore, stabilizes the time relay operation cycles. The relay can control the operation of the sprinklers not only according to the "Even-odd" scheme, when half of the settings are turned off, and half - working. Installations can be divided into three, four and more consistently working groups. To do this, it is only necessary that the bottom capacitance be connected to the switch 7 not rigidly, as in the case described, but through a transmission mechanism that ensures that the tap of the valve turns only on the third or fourth rotation of the capacitance. The use of the proposed time relay, due to the presence of the upper tank and closed containers, ensures stable time-independent and independent of pressure fluctuations in the pressure network, switching cycles of the sprinklers, as well as increasing their reliability during operation and ultimately improving the uniformity of irrigation and reducing operational costs for watering.

Claims (2)

1. USSR author's certificate number 137278, cl. G 01 F 11/26, 1960. 2. USSR author's certificate No. 335488, cl. A 01 G 25/00, 1970 (prototype).