SU1445599A1 - Arrangement for application of liquid fertilizers with irrigation water - Google Patents

Abstract

The invention relates to agriculture and can be applied to irrigation and sprinkling machines for spreading liquid fertilizers and chemical irrigation water. The purpose of the invention is to ensure the continuity of the dosing of liquid fertilizers and simplify the design. The device contains a tank 1 for liquid fertilizers, a diaphragm metering pump with working cavities A and B and a hydraulic motor communicated via distributor 10 with a pressure pipe 11. A venturi 12 is installed on the pressure pipe, the minimum flow section of which is connected with the working cavities of the pump The metering device and with the drain line of the distributor 10. Due to the pressure difference in the minimum flow area of the Venturi tube 12 and in the pressure pipe 11, the hydraulic motor is operated together with the metering pump. 1 il.

Description

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The invention relates to agriculture, and can be applied to irrigation and sprinkling machines for applying liquid fertilizers and chemicals with irrigation water.

The purpose of the invention is to ensure the continuity of the dosing of liquid fertilizers and simplify the design.

The drawing shows a device for applying liquid fertilizer with irrigation water.

The device contains a tank 1 for liquid fertilizers, a membrane metering pump consisting of a hollow body 2 divided by a membrane 3 into working cavities A and B. The membrane 3 is made with a rigid center 4.

A double-acting hydraulic motor consists of a hollow body 5, divided by membrane 6 into cavities B and G. Membrane 6 is made with a rigid center 7. The rigid centers of membranes 3 and 6 are interconnected by a stem 8, the free end 9 of which is kinematically connected to a four-way distributor 10. The latter informs the cavities B and D alternately with the pressure pipe 11 and with the minimum flow area of the Venturi tube 12 installed on the pressure pipe 11.

The working cavities A and B are connected through the suction pipe 13 and check valves 14 and 15 with a capacity of 1 and through the discharge pipe 16 and check valves 17 and 18 with a minimum passage through the cross section of the Venturi tube 12.

The valve is 10 g in pressure line 19 with a pressure pipe 11, and a drain line 20 through an adjustable choke 21 and valve 22 with a minimum flow section of the Venturi tube 12.

The tank 1 is connected to a pressure pipe 23, on which a valve 24 is installed.

Soluble fertilizer is loaded into the tank 1, the valve 24 is opened and the tank 1 is filled with water to the required level, after which the valve 24 is closed. From the tank 1, the fertilizer solution is fed by the dosing pump into the irrigation water. To drive the metering pump, the valve 22 is opened. Water under pressure through the pressure line 19 through the distributor 10 enters the cavity B of the hydraulic motor, the hard center 7 with the brush 8 and the hard center 4 are moved to the right, while through the suction pipe 13 and the return

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valve 14 filling the working cavity A with fertilizer solution.

At the same time, during the stroke of the rod 8 to the right, the fertilizer solution is displaced from the working cavity B through a check valve

18 and the discharge pipe 16 and the minimum flow area of the Venturi tube 12. Simultaneously, the waste water is displaced from the hydraulic motor cavity G through the distributor 10 and the drain line 20 to the minimum flow section of the Venturi tube 12.

When the stem 8 is extended to the extreme right position, the free end 9 switches the distributor 10. Under pressure, the water enters the cavity G of the hydraulic motor and the stem 8 with rigid centers 7 and 4 makes a turn to the left, while filling the suction pipe 13 and the check valve 15. the working cavity B with fertilizer solution, and from the working cavity A through the check valve 17 and the discharge pipe 16, the fertilizer solution is displaced into the minimum flow area of the Venturi tube 12.

In this way, the dosing of liquid fertilizers into the irrigation water flow is consistently and continuously, thus ensuring uniform distribution of fertilizer fertilizers with irrigation water over the irrigated area. Fertilizer dosing is controlled by the choke 21.

The efficiency of the hydraulic motor and the device as a whole is ensured by the pressure difference in the pressure line

19 and the discharge line 20, since in the minimum flow area of the venturi 12 it is smaller than in the pressure pipe 11.

Claims (1)

Invention Formula A device for applying liquid fertilizer with irrigation water, containing a container for liquid fertilizer, having a working cavity diaphragm dosing pump, kinematically connected with a hydraulic motor, communicated through a discharge pipe with a discharge line, with the aim of ensuring continuity of dosing of liquid fertilizers and simplified construction; a venturi tube is installed on the discharge pipe; the minimum flow area of this tube is hydraulically connected to the working cavities of the dosing pump Ora and with drain line dispenser.