SU1763564A1 - Water intake of irrigation system - Google Patents

Description

one

(21) 4821959/15

(22) 03.30.90

(46) 09/23/92. Bul No. 35

(71) All-Union Scientific Research Institute of Complex Automation of Land Reclamation Systems

(72) M.I / I. Golubenke and V.V. Gridnev

(56) USSR Copyright Certificate No. 1372012, cl. Е 02 В 13/00, 1986.

(54) DRAINAGE DEVICE OF THE IRRIGATING SYSTEM

(57) The invention relates to hydraulic engineering, namely, devices for automating water intake into a closed irrigation system from open canals, as well as to protect a closed network from being clogged by sediments.

and flipper. The purpose of the invention is to increase the reliability of operation by intensifying the circulation flow along the side walls at the place of diversion of water. The goal is achieved by the fact that in a water intake device, which includes an outlet channel 6 adjacent to the transit channel and a drainage channel 6 communicating with it through a culvert window 5, the lattice in the culvert window is made in the form of vertical turning louvers, whose width decreases in the direction of flow in the transit channel. At the same time, below the vertical louvers are mounted at an angle of 55-65 ° to the wall of the heat cantilever guide plates. 3 il.

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The invention relates to hydraulic engineering, in particular, to automate water intake into a closed irrigation system from open canals, as well as to protect the closed from clogging with sediment and fin.

A water outlet with a remotely controlled siphon hydraulic automat is located in the channel and has an overlapping support in the avancamera and overflow of the transit flow through the retaining spillway wall, and the siphon itself with a device for charging and shutting down the siphon (1).

It is also known to have a water intake device for an irrigation system including a transit channel in communication with a diversion channel through a culvert having a grate (2).

The disadvantage of this device is low reliability due to the fact that a pile of sediments is formed in front of the culvert window, which causes some of the bottom sediments to enter through the slit and there are strong upward currents that worsen the water intake conditions and also create difficulties in maintaining stable water withdrawal closed irrigation system. In addition, there is no discharge of sediment and debris to the central axis of the channel from its wall. All this reduces the performance of systems as a whole.

The purpose of the invention is to increase the reliability of operation by intensifying the circulation flow along the side walls at the place of diversion of water.

The goal is achieved by the fact that in the water intake device of the irrigation system, including a transit channel, communicating with a diversion channel through a culvert opening equipped with a grate, the latter is made in the form of vertical pivoting shutters, the width of which decreases in the direction of flow in the transit channel, while below the culvert at an angle of 25 ... 30 ° to the channel wall cantilever guide plates are installed.

FIG. 1 shows a water intake device for an irrigation system, a plan; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

In the transit channel 1, a retaining structure was installed, made by an automatic water-activating gate 2, ensuring the constancy of the water level in the upstream 3 and dumping both floating debris and sediment into the downstream 4. In the wall of the transit canal 1, a water outlet 5 is made, to which a discharge channel 6. In the hole 5 are installed with the possibility of rotation in the vertical plane on the axis x 7 vertical louver plates 8 with transverse rods 9 with hinges, the upper ends of the plates 8 are rigidly connected through 10, which in turn is attached to the screw drum 11, on which the locking dog is mounted (on

0 drawing not shown), it is possible and remote control.

Louvre screen with louver plates 8 mounted parallel to each other and angled

5 to the longitudinal axis of the transit channel 1, directed and executed in plan so that the width of each of them decreases in the direction of flow through the transit channel 1. Between the vertical plates 8, below their ends, plates 12 are attached at an angle of 25 ... 30 To the culvert opening 5 and with a gap 13 above the bottom of channel 1. Plates 12 are made cantilever above the bottom of channel 1 and contribute to the development of a circulating flow, since they are oriented with free ends in the direction of flow along the transit path.

The shutter 2 includes a drain

0 wall 14, a horizontal axis 15 and connected to a counterweight balancer 16 with the possibility of adjustable movement along the beam 17. The second horizontal axis 18 is moved beyond the flange 14 and supplied5 at the ends with rollers mounted in the guides 19 placed on the walls of channel 1. Gate 2 and the shelf 14 pivotally and with the help of the support pipes 20 and 21 are set at an angle to each other, not exceeding 90 °.

0 A rod with a float 22 is fixed at the end of the flange 14 with the possibility of changing its position relative to the flange 14.

The intake works as follows

5 A stream, saturated with fin and sediment, through transit channel 1 goes to automatic valve 2, which creates a predetermined level of water in front of port 5 to take water from channel 1, while the flow

0 hitting the plate 8 wraps around the vertical part of it, and the garbage moves to the central part of the transit channel 1. However, due to the withdrawal of water from channel 1 to the discharge channel 6, debris along the length of channel 1 tends when 5 approaches hole 5 but due to the fact that the width of each plate 8 decreases in the direction of water movement in channel 1, debris does not reach the plates and is further transported further through the top of the water shelf 14 to the lower reach 4. The sediment contained in the water is deposited on the bottom of channel 1 and between the plates 12 , and accumulate in front of the shutter-auto atom 2. This causes pressure on it and the elevation of the upper pool. It creates a larger moment than the holding moment from the force of the shelf 14 and the counterweight 16, and causes the automatic shutter 2 to turn on the deposited sediment. Cleaning is efficiently carried out due to the high-speed flow and the formation of a vortex between the gap 13, vzmuchivayuschey and washing out from under the plates 8 and 12, which are washed away organized in the downstream 4. In addition, this repositioning of the louvered plate 8 by controlling The glands 10 in the aggregate securing the lower plates 12 above the bottom of the channel 1 prevent sediment deposits and carry them to the downstream 4. Hole 5 is protected from sediment and floating debris. If it is necessary to reduce the flow through the culvert 5, or to cover it, the louver plates 8 are moved by the movement of the rod 10.

The shutter 2 is in the open position until the overturning moment becomes more holding, and during this time the sediment has time to be washed into the lower pool. Application

5 I K P 21

FIG. 2 78 7

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Claims (1)

between the louvre plates and below their location, the cantilever plates in front of the culvert with the closed automatic valve, creates a zone of reduced pressure, and sediments are deposited on the bottom of the channel until the automatic valve opens. Such an optimal kinematic effect of the louvre swivel plate and the cantilever plates at the bottom of the canal can fight both sediment and fin transported by the transit water flow through the canal, preventing them from entering the closed irrigation system. Invention A water intake device for an irrigation system including a transit channel communicating with an outlet channel through a culvert opening provided with a grate, characterized in that, in order to increase the reliability of operation by intensifying the circulation flow along the side walls at the place of water drainage, the grate is made vertical swivel shutters, whose width decreases in the direction of flow in the transit channel, below the culvert at an angle to the channel wall restructuring plates installed. li