SU923471A2 - Arrangement for controlling sprinkling system - Google Patents

Description

I

The invention relates to agriculture and can be used to improve the accuracy of controlling the amount of water supplied for irrigation.

According to the main avto, ev, no. 715066, a device for controlling the irrigation system is known, including a reservoir-reservoir, a rain-measuring funnel installed above it, and a measuring device.

The disadvantage of this device is the low reliability of its operation due to the fact that sediments that do not have a moisturizing effect - for the soil are taken into account in the water balance.

The purpose of the invention is to increase the reliability of operation by eliminating from the water balance precipitation that does not have a moisturizing effect on the soil,

This goal is achieved by the fact that the device is equipped with an additional storage tank with a water sensor installed there (a sensor for the presence of water in it and a discharge pipe with a valve, communicating via a main reservoir tank with a valve at the bottom of the tank and a discharge pipe and connected to a measuring device.

The drawing shows a device for controlling the irrigation system.

The device comprises an evaporator tank 1 communicating with the main reservoir reservoir 2 through the connecting pipe 3 and the float chamber 4,

A nozzle 5 is mounted in the tank-evaporator. The float chamber contains a float 6 and is mounted under the lower part of the main storage tank 2. A rain funnel 7 is installed above the main storage tank with a calibration hole 8 in its lower part. An additional storage tank 9 with a drain siphon 10 and water availability sensors 11 is mounted under the funnel 7, and a water discharge pipe 12 with a valve 13 is connected to its lower part. Water availability sensor 11 and valve 13 are connected to a measuring device. The storage tank 2 is connected to the irrigation system through a pipeline 1 with a metering device 15 and contains electrical sensors 16 and 1 / level and a water outlet-limiter 18 level.

The device works as follows.

The water through the pipeline is supplied to the storage device 2, from where through the float chamber k enters the tank-evaporator 1 and when the top 5 of the nozzle 5 is reached, the float 6 blocks the water supply. The water horizon in the storage tank 2 is at the level of the upper sensor 16. The level sensors 16 and 17 are closed to ground through the water. The fixture is in its original position.

In the future, the device operates in two modes: in the absence of precipitation or precipitation.

In the absence of precipitation, the evaporation of water from the evaporator tank 1 leads to a decrease in the level of water in the float chamber k and entry into the evaporator tank 1 ,. thus, the water level in the evaporator tank will always be constant. The decrease in the water level in the main storage tank 2 leads first to a disconnection from the mass of the upper level sensor 16. And the opening of the lower level sensor 17 serves as a signal to start the work of the irrigation system. During irrigation, water through pipe 1 enters storage tank 2. The duration of filling the volume between sensors 16 and 17 (the actual duration of irrigation) is regulated by the dispenser 15. A short to ground on the upper sensor 16 serves as a signal to turn off the system. The duration of the inter-irrigation interval is determined by the distance between the upper 16 and lower 17 sensors. Thus, the system again came to its original position.

When precipitation water from the rain funnel 7 enters the additional reservoir tank

9. Calibration hole 8 in the lower part of the funnel 7 allows only those precipitations, the fallout rate of which is equal to or less than the soil absorbency, to be passed into the additional reservoir tank.

Small amounts of precipitation, for example less than 5 mm, that do not have a moisturizing effect on the soil, which should therefore be excluded from the water balance, will not accumulate in reservoir reservoir 2, since water from the reservoir reservoir 9 through the drain siphon 10 is possible only at the water level above the top (knee) of the drain siphon. A drain siphon 10 is established at the rate of flooding his knee when the amount of precipitation exceeds 5 mm.

Consequently, precipitations of less than 15 mm are delayed in the additional storage tank 9. After a predetermined time interval determined by the measuring device, the signal from the sensor 11 for the presence of water connected to the logic element and the measuring device receives a signal to open the valve 13, which ensures the discharge water from additional storage tank 9 through the catchment pipe 12.

In case of large amounts of precipitation of low intensity, the accumulation tank overflows with water is excluded, since the outflow limiter 18 is mounted above the upper sensor 16.

Claims (1)

Invention Formula Device for controlling the irrigation system on auth.St. No. 715066, characterized in that, in order to increase reliability by eliminating precipitation from the water balance, which do not have a moisturizing effect on the soil, it is equipped with an additional reservoir with a water presence sensor and a collection pipe with a valve connected under the rain gauge through a siphon with the main reservoir tank, while the sensor availability of water 592347 6 and the valve is installed in the lower part. The sources of information, the reservoir and the discharge pipe are taken into account during the examination and are connected to the measuring device. 1. USSR author's certificate No. 715066, cl. A 01 G 25/00, 1973.  tt Sp