SU1599660A1 - Water meter for open irrigators - Google Patents

Abstract

The invention relates to a technique for measuring and controlling the volume of water in open irrigators. To increase the reliability of the water meter, the outlet mechanism is provided with a filter, and the float is connected to the cable through a parabolic pulley coaxially with each other and a gear wheel, which is kinematically connected with a vertically mounted comb, at the bottom end of which a float is fixed. 3 il.

Description

This invention relates to the measurement and control of the volume of water in open irrigation systems.

The purpose of the invention is to increase the reliability of the device.

FIG. 1 shows the general concept of the proposed water meter; in fig. 2 - water outlet mechanism; in fig. 3 - shaft diagram.

The water meter for open sprinklers consists of a water measuring tank 1 connected by tubes 2 and 3 to a tank 4. Tubes 2 and 3 maintain a constant water level in tank 4. Tank 1 is sealed from the top by a cover 5. To control the amount of water in tank 1 installed, a piezometer 6 with a calibration scale and a protective cover 7. The water outlet mechanism is connected to the lower part of the tank 4 with an elastic hose 8

(Fig. 2), consisting of a cylinder 9 and a homogeneous filter 10. The outlet mechanism with a counterweight 1 through the cable 12, and a float through the comb 13 13 is connected to a common shaft 14, and at one end of the shaft 14 the driven spur gear 15 is rigidly fixed , comb 13,

and at the other end, a pulley 16 of a parabolic PSX (Fig. 3). On the parabolic surface of the pulley 16, spiral-shaped grooves are made in which cable 12 is located, so that any movement of the comb 13 with a float 17 by the value H corresponds to the movement of the cable 12 with a counterweight by 11 by the value. A weir with a thin wall is installed before the water meter.

Water meter works as follows.

When the float is at the zero point of the weir, the discharge mechanism is at the level of the water in the tank 4, and the outflow through the filter 10 does not occur. When the head is above the weir, the float 17 with the comb 13 rises by the value N. Under the action of the counterweight 16 and the pressure force on the float, the shaft is twisted, releasing from the other end the coiled cable 12 by the KOHN value and creating a head equal to the Flow passing through the filter equal to

q, K, K A where K is the filtration coefficient;

(L

ate

with

ABOUT)

A is the cross-sectional area of the filter;

CR is the coefficient of proportionality.

Such a movement of the water outlet mechanism at any head H over the weir ensures the constancy of the flow rate passing through the filter g and weir q:

q mb- / 2qH H - - const,

T

10 Water meter for open sprinklers, containing a water-measuring sealed tank connected to a constant-level tank, to the lower part of which is connected by means of an elastic hose to a discharge outlet, where the weir width.

The tank 1 with the tubes 2 and 3 connected to it provides a constant level after a certain time has elapsed. | G sling, connected via a cable to the anti-indication of the piezometer 6 graduated with the float, characterized in that

in units of volume, it is possible to determine it — in order to increase reliability, the water volume of water flowing through the device is provided with a filter, and floatable. The cable is connected to the cable through the injected and

Depending on the filter coefficient, the flow rate from the tank 2 qi is a pulley of parabolic shape and a gear that is flowing on the shaft coaxially with each other. Therefore, the necessary wheel, kinematically connected with the tank 1, is also insignificant, which is provided with an air-mounted comb, on the bottom of which there is a significant economic effect, the end of which is fixed to the float.

effect In addition, the proposed device provides increased reliability, since during operation of the water meter the filtration coefficient K does not change and the proportionality of the flow passing through the drainage mechanism and the open irrigator is not affected.

Claims (1)

Invention Formula Water meter for open sprinklers, containing a water-measuring sealed tank connected to a constant-level tank, to the bottom of which is connected by means of an elastic hose a water outlet mechanism connected through a cable to the counter  Tt 1 1B / / 15 / / ftsg.Z