SU1328676A1 - Water meter for open sprinklers - Google Patents

Abstract

The invention relates to the measurement and control of water flow in irrigation systems and allows for improved measurement accuracy. A water trigger mechanism is connected to the lower part of the fixed tank 2 of a constant level, which is associated with poplikom 3. With a head above the weir in the water trigger mechanism by moving the piston; a response opens in the side wall, through which a certain amount flows, in the liquid. The natural volume of water flowing through the weir is determined using a piezometer 6 connected to a sealed water measuring tank 1. A constant level corresponding to the maximum water level of the reservoir is maintained through pipes 9 and 10 in tank 2. 2 Il. SS V Yu

Description

The invention relates to the measurement and control of water flow in irrigation systems.

The aim of the invention is to improve the accuracy of flow measurement.

FIG. 1 shows a general concept of the proposed water meter; in FIG. 2, node I in FIG. one.

The water meter consists of a water measuring tank 1 connected by tubes 9 and 10 with a tank 2, in which a constant level is maintained, corresponding to the maximum water level in the irrigator. The tank 1 is closed on top by a rubber stopper 8, which ensures its tightness. To control the amount of water in tank 1, a piezometer 6 is provided with a calibration scale and a protective cover 7.

A water trigger mechanism (Fig. 2) is connected to the lower part of the tank 2 by a polyethylene elastic hose 4, consisting of a cylinder 14 with a side opening 16, a spring 15 and a piston 17 with a piston 17 moving depending on pressure, and a cable with an anti-weight 13 rollers 12 are connected with float 3. A weir 5 with a thin wall is installed in front of the water meter.

The water meter works as follows;

When the float is at the zero point of the spillway, the water trigger mechanism is at the level of water in tank 2 and no outflow through hole 16 occurs. With the pressure above the weir, the float-3 rises, and the water-trigger mechanism drops by N.

Under the pgH pressure, the piston 17 is moved by an amount, and an opening area of O) b | KN, through which the flow follows,,. equal

q, pKb

where K and (U are constant coefficients. Such a displacement of the piston at any head H ensures the constancy of the ratio of costs passing through the hole q and the weir q mb42 gH.

Tank 1 with pipes 9 and K connected to it) ensures constant water level in tank 2.

After a certain time has elapsed, the volume of water that has flowed through the spillway can be counted naturally on the gauge tank calibrated in units of flow.

25 Form

but

the invention

A water meter for open sprinklers containing a water meter tank, a float chamber with a float, and a water trigger mechanism, which is designed so that, in order to improve measurement accuracy, the water trigger mechanism is equipped with a cylinder with a side drain hole and spring-loaded the piston, with the cylinder of the mechanism being connected with the flexible head, the float chamber is made in the form of a sub-baseless tank of a constant level, and the water meter tank is made airtight.

FIG. 2

Compiled by Y. Repy Editor O. Yurkovetska Tehred L. Serdyukova Proofreader G. Reshetnik

Order 3475/44 Circulation 693 Subscription

VNIIPI USSR State Committee

on inventions and discoveries 1 13035, Moscow, L {-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

Claim A water meter for open irrigators, comprising a water tank, a float chamber with a float and a water drainage mechanism, which is necessary in order to increase the measurement accuracy, the water discharge mechanism is equipped with a cylinder with a lateral drain hole and a spring-loaded piston, the cylinder is mechanically connected to the float by a flexible connection, the float chamber is made in the form of a fixed tank of a constant level, and the water meter tank is sealed. FIG. 2