SU1430941A1 - Arrangement for regulating water level in irrigation systems - Google Patents

Abstract

The invention relates to agriculture and can be used to regulate the level of water in irrigation canals of hydraulic structures. The aim of the invention is to improve the speed of the device. The goal is achieved by the fact that in the device comprising a chamber 1 of an elastic shell with a first wall 3, communicated with the headstream tube 9, there is a shutter in the form of a flexible sleeve 11 with a second wall

Description

The invention relates to agriculture and can be used to regulate water levels in irrigation canals equipped with regulating hydraulic structures.

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

The drawing schematically shows the device.

The device includes a chamber 1 of elastic sheath with a rigid plate 2 in the end part, attached -. to the fixed first wall 3 and forming a closed cavity with it 4. Wall 3 is fixed by means of brackets 5 in the downstream to the piers or to the water pipe 6. Pipe 9 with flexible tee 8 is connected to wall 3 having an opening 7 a section for communication with the upper reach, on which the float valve 10 is installed. The valve of the device is made of a flexible hose 11 connected along the perimeter to the second wall 12. The wall 12 is fixed by means of brackets 13 in the lower tail of the outlet pipe 6. To the flexible hose 11 hand water outlet the thrust pipe 6 is attached to a rigid pipe 14, installed coaxially with the outlet pipe of the water outlet pipe 6 with a sealing gasket 15. In the wall 12 there is a guide 16 through which a rigid connection 17 is passed, which on one side is attached to a rigid plate 2 of an elastic shell and on the other hand, to the rigid plate 18. The plate 18, in turn, is rigidly attached to the rigid nozzle 14 with the help of the needles 19.

The device works as follows.

In the initial state, when the water level in the downstream is equal to the set point, the float valve 10 is closed and under the pressure of the water level in the upstream of the outlet pipe 6 through pipe 9 through the tee 8 and the hole 7 in the first wall 3 into the chamber 1; , and the elastic shell of the chamber 1, filling, moves towards the waterway pipe 6. In this case, the movement of the elastic shell through the rigid plate 2 is transferred to the rigid link 17, which, moving along the guide 16 of the second wall 12, moves the rigid nozzle 14 to moment to press plotni- tion pads 15 to the end of water discharge pipe 6. At the rigid pipe 14 and flexible hose moves I1 and zakrshaet path ingress of water into the downstream pipe 6 vodovtusknoy.

When the water level in the downstream side of the outlet pipe 6 decreases, the float valve 10 opens. At the same time, under the pressure of water in the outlet pipe 6, as well as the effect of the kinetic energy of the flow on the plate 18, the flexible sleeve 11 with the rigid nozzle begins to move, opening the way for water to reach the lower reach. The force from the plate 18 is transmitted through the rigid connection 17 to the 0 rigid plate 2 of the chamber 1, under the influence of which water is displaced from the chamber 1 through the tee 8 and the float valve 10 into the lower reach. The flexible hose 1I with the rigid nozzle 14 is moved until the cavity of the chamber 1 is completely emptied, and the inflow of water to the lower pool increases. The position occupied by the shutter and the camera 1 is shown.

Q in the drawing by the dotted line.

When the water level in the downstream reaches a predetermined level, the float valve 10 closes and the device closes back to its original position.

five

Structurally, the parameters of the device are selected from the following expression

ySvZ (S - 83) -Z + Fe.n +2: Frp,

"(one)

where J is the specific weight of water;

S ,. - cross-sectional area of the wall 3; GZ - the cross-sectional area of the wall 12;

Zl - flexible arm cross-section 1I;

Z is the head of water in the pools of the discharge pipe 6,

Fgj, - the force of the kinetic energy of the flow on the plate 19 j

2 ff. p - the total force required to move the elastic sheath 1 and the flexible sleeve 11 of the shutter.

Usually, the values of Fg and r are relative to the other two terms of the expression (O, therefore, expression (I) can be rewritten approximately as:

 } (S4 - Sj)

S, - S3

(2)

In turn, the cross-sectional area S, the wall 12 is 0.8-0.9 of the cross-sectional area 84 of the flexible sleeve 11 of the supervisor, and the value of the cross-sectional area S, the wall 3 is 0.8-0.9 of the area 10. elastic shell chamber 1.

In view of the above, expression (2) can be rewritten as: 15

or

(0.8-0.9) S - (0.2-0.1) S S 7 (0.25-0.11) 84. (3)

From the expression (3) it follows that to ensure the normal functioning of the device, it is necessary that 25 the cross-sectional area of the elastic shell of chamber 1 be greater than 0.25 the cross-sectional area of the flexible valve sleeve 11 (or the cross-sectional area of the outlet pipe 6) .3Q

0

five

0

5 Q

F (-1 p l l of invention

one . YcTpoiiCTBo for regulating the level of water in irrigation systems, containing a valve in the form of a chamber of elastic sheath, attached along the perimeter to the fixed first wall, the chamber cavity is communicated with the upper pool by the tube on which the float valve is installed, in order to increase the speed of the device, it contains a shutter, made in the form of a flexible hose connected perimeter with the second wall, and a rigid nozzle installed coaxially with the outlet nozzle of an irrigation discharge pipe Stem and bonded with a flexible sleeve, wherein the shell elaspgchna connected to a rigid pipe 1M rigid bond.

 2. The device according to p. I, about tl and the fact that the elastic shell is connected to a rigid pipe through a rigid plate mounted on a rigid connection placed coaxially with a water outlet pipe and connected with a rigid pipe by means of knitting needles.

Claims (2)

Claim 1. A device for regulating the water level in irrigation systems, containing a shutter in the form of a chamber made of an elastic shell attached around the perimeter to a fixed first wall, the chamber cavity is in communication with the upper pool by a pipe on which a float valve is installed 1Q, τη and that , in order to improve the speed of the device, it contains a shutter made in the form of a flexible sleeve connected along the perimeter with the second wall, and a rigid pipe mounted coaxially with the outlet pipe of the water outlet pipe irrigation oh system and associated flexible ru2Q kavom, wherein the elastic shell is connected with a hard rigid pipe coupling. 2. The device according to p. I, o t l and the fact that elastic 25, the sheath is connected to the rigid nozzle via a rigid plate fixed to spokes placed coaxially with the water outlet — pipe and connected to the rigid nozzle.