SU1707390A1 - Liquid flow switch - Google Patents

Abstract

The invention relates to automation and can be used in agriculture, in particular in the technique of discrete irrigation of agricultural crops. The purpose of the invention is to increase reliability in operation. At the beginning of the filling of the conveying pipeline 14, the water moves with great speed, passes through the Venturi nozzle 13, air is sucked out and the check valve 16 opens. As a result, air from tube cavity 21 and 19 is carried into pipe 14, and thus working fluid from tank 1 begins to flow through water transfer pipe 3 to tank 2. In this case, two-way valve 23 is closed (there is no communication with the atmosphere), and 25 is open, the valve 9 closes the output path of the irrigation pipe 27 until the fluid fills the tank 2 and its weight exceeds the hydrostatic pressure of water in the cavity of the housing 7. After the tank 2 is filled with water, it lowers and the tank 1, empty with the arm 5. This movement acts on the swivel axle 6, to which is attached piston rod 8, Shar Nirni connected to the power lever 10. 3 yl. i (Л С

Description

The invention relates to automation and can be used in agriculture, especially in the technique of discrete irrigation of agricultural crops.

The purpose of the invention is to increase reliability in operation.

FIG. 1 shows a fluid flow switch, general view; in fig. 2 is a view along arrow A in FIG. 1; FIG. 3 - node I ne figure 1.

The switch contains a switching element in the form of two closed containers 1 and 2 connected between

in the upper part of the hydraulic tube (water transfer) 3 with valve 4, the tanks are fixed on the lever 5 mounted on one axis of rotation 6, which is attached to the housing 7. The lever 5 is connected to the rod 8, one end of which is provided with valve 9 and the other through the hinge is kinematically connected with the power lever 10, the tank is filled with liquid 11, which is alternately the weight for the lever 5,

The flow switch contains a device for pumping out the cavities of the tanks.

one

with

WITH

1 and 2, made in the form of a vacuum pump 12 or a Venturi nozzle 13 installed in the flow of the transporting pipeline 1 by means of a pneumatic tube 15, a check valve 16 and a valve 17. In addition, the flow switch contains a mechanism for transferring the liquid 11 from the tank 1 or 2, composed from connecting cavities of capacities 1 and 2 of pipelines 13 and 19, respectively, including flexible pipelines 20 and 21, as well as from other cranes 22, 23, 2, 25, pivotally connected to lever 10, and through cavities of containers 1 and 2 respectively with a waiver device chk 12 or 13 and the atmosphere

The conveying pipeline 1 at the points of the water outlet includes an outlet 26, connected to the housing 7, connected to the irrigation (discharge) pipes 27 and 28, between which is placed the rotary valve 9.

Switch fluid flow works as follows.

At the beginning of the filling of the conveying pipeline 1, the water moves with great speed, passes through the Venturi nozzle 13, air is sucked out and the check valve 1G opens. As a result, coarse 21 and 19 air is carried out from the cavity of the tank into the pipeline, and thus the working fluid from tank 1 begins to flow through the water transfer pipe 3 into tank 2. In this case, the two-way valve 23 is closed (there is no communication with the atmosphere), and valve 25 open, valve 9 closes the output path of the irrigation pipe 27 until the liquid fills tank 2 and its weight exceeds the hydrostatic pressure of water in the cavity of housing 7. After the tank is filled with water, it goes down and tank 1, empty, rises lever 5. This movement acts on the pivot axis 6, to which the rod 8 is attached, which is pivotally connected to the power lever 10 (route). Thus, the force is forced on the lever 10, it is controlled, for example, by a valve 22 for closing the atmosphere, and by a valve 2k for opening to communicate with the vacuum a pumping device made in the form of a Venturi nozzle 13 or a vacuum pump 12.

Then the cycle automatically repeats. If the flow rate of water in the pipeline 1 is insufficient, a vacuum pump 12 is additionally simultaneously put into operation, under the action of which the suction of atmospheric air from one of the tanks increases sharply (at this moment the return valve closes the hole in the pneumatic valve 15). close and valve

pan 16 tube 17).

five

0

five

,

d $

0

35

40

50

55

Thus, to accelerate the process of fluid flow from one container to another, or vice versa, it is sufficient to put the vacuum pump 12 into operation. At the same time, air is pumped out of one tank and atmospheric air flows into another tank, respectively, and the rate of water flow increases. The operation control from the driving pipelines (irrigation) through the valve 9 is reduced to the control of the valve on the hydraulic ROZO-overflow pipe 3 (time relay). This control is carried out both locally, manually, and remotely by means of telemechanics from the water distribution control center in the housing 7.

Thus, the force is applied to the movement of the horizontal lever 10, the valve 9 is controlled automatically. The presence of a water-transfer tube 3 with a valve 4 allows you to set the flow rate of fluid from one cavity of tank 1 to another cavity of tank 2. As a result, a pulsed irrigation of the field section is carried out at a specified time interval due to the operation of tanks 1 and 2, respectively. 9 for opening and closing the outlets of irrigation pipelines 27 and 23 "

In addition, in addition, the presence of a valve 17 on the tube 15 and its closure allows the use of, for example, a compressor that produces compressed air. To turn off any tank 1 or 2, it is enough to close valve k against the stop. The number of irrigation pipelines is determined by calculation, which allows the device to expand its capabilities. In order to prevent seizure and impact when in contact with the outlet, with tips of irrigation pipes 27 and 28 when changing their closure and to prevent fluid leakage, valve U is equipped with a sealing element, for example, from the bottom.

Claims (1)

Invention Formula A fluid flow switch comprising a housing provided with a two-discharge and symmetrically measured two discharge pipes, between which a rotary closure member is mounted, the stem of which is connected to a drive made in the form of a double-arm lever, the ends of which 0 five loaded with the weight of a fluid placed in the vessel, characterized in that, in order to increase reliability, it is equipped with a tank cavity pumping device and a fluid pumping mechanism composed of a pipeline connecting the tank cavity and two-way valves through which the tank cavities are communicated respectively with the pumping device and atmosphere, while the locking bodies of two-way valves of the hinge are connected to the lever, kinematically connected with the stem of the locking member of the switch “ 23 S 19 25 7JW Fy / // / / 4 Ю 27 8 7 28 Fi. I