SU1760000A1 - Water intake structure - Google Patents

Abstract

Use: for water intake from rivers. Summary of the invention: a tray with a lid 3 is installed across the river with a hollow in its bottom, on which are spreading valves 4. made in the form of hollow semi-cones without bases, oriented with their tips towards the front wall of the tray. The front wall of the tray is located above the rear wall. In the lid under the tops of the half-cones, the water intake holes 6 are made. 4 flowed out are placed on the lid 3 in a checkerboard pattern. The tray is connected to the shore well 2, in which the pump inlet is lowered. The front wall of the tray forms the backwater in the river, and above the lid 3 a flow decline curve is formed, which ensures the entrainment of young fish and sediment for the construction downstream. The water enters under the cutters 4 and through the openings 6 enters the tray, and then into the well 2, from where it is collected by a pump, 2C. f-ly, 5 ill. ate with

Description

The invention relates to hydraulic engineering, in particular to devices that prevent the ingress of fish into water intake structures.

The aim of the invention is to increase the efficiency of work by improving the conditions for the removal of juvenile fish and sediment.

FIG. 1 shows a water intake device, a longitudinal section; figure 2 shows a fragment of the structure, a plan; on fig.Z shows the section aa in figure 2; Figure 4 shows the structure of a semi-cone; Fig, 5 is a fragment of the plan of the device with a staggered arrangement spreading.

The water intake structure includes a tray 1, recessed into the bottom of the river and located across its bed, the tray 1 is connected

with a shore well 2 and provided with a lid 3 with sliders 4, made in the form of half cones, having openings 5 a of their bases. In the inner space of the half-cones 4, under their top, in the cover 3 there are made water intake holes b. The inlet 5 of the half-cones 4 in its lower part can be provided with partitions 7.

The spreaders 4 can be installed in a checkerboard pattern.

Water intake works as follows

The river flow, the passage of the tray 1, runs onto the front wall of tray 1, due to which a partial water level forms above the structure and the corresponding | Oh oh

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The decay curve with elevated flow rates above sloping creek 3 potok 1. A river stream with young fish and drawn sediments (the latter are drawn in the bottom layer of the watercourse) runs over spreading 4 and forms descending currents on their surface transporting the young fish and sediments into the space between the spreader A, which are located coaxially one after another.

Water for under-consumption is taken through holes 6 in the lid 3 of tray 1, from where the water enters the coastal well 2 and is then supplied to the consumer. Water is taken in through the holes 5 at the base of the spreaders 4 at a speed of 0.15-0.20 m / s, which leads to the formation of 4 zones of water exchange between the stream behind the spreaders, flowing around them at significant speeds both between the rows and the and from above, and the zone in which water moves in the direction of holes 5. By creating a water exchange mode, the fry fry 4 will protect the young from getting into the water intake, as the fry will be transported in transit and flow downstream. At the same time, sediments can be deposited behind the spreaders 4 in the shaded area, some of which even over a speed of 0.15-0.20 m / s can be drawn into the water intake. To avoid this, there is a partition 7 at the base of the openings of the slitter 4, which reduces the ingress of transported sediment into the water intake.

If the dividers 4 are placed over the surface of the lid 3 in a checkerboard pattern, the device operates as described above, but it increases

ripple flow rate, which increases its transport ability

In addition, the invention allows the selection of water flow from the water exchange zone formed behind the spreading bases, and also contributes to improving the flow nasal transport capacity.

Claims (3)

1. Water intake structure, including a tray with a lid and water inlets, located across the river and buried in its bottom, a water intake well connected to the tray, spreading valves made of the type of floor: semi-bodies without grounds, an iaie is placed on the lid, the front wall of the tray is located above the rear wall, characterized in that, in order to increase work efficiency by improving the conditions for removing juvenile fish and sediments, the hollow semi-cones are oriented to the front wall of the tray and the water inlets are in the lid under the tops of the semi-cones. 2, the structure of claim 1, wherein the cover is made with thresholds located under the coluconus in the planes of their bases. 3. The construction of PP.1 m2, characterized by the fact that spreading valves are placed on the lid in a checkerboard pattern J A srigg czrx Ll 1i .S