SU1671762A1 - Spillway dam - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to a hydropower plant and can be used in the spillways of high-pressure hydropower plants. The purpose of the invention is to increase the efficiency and reliability of work. The dam consists of located opposite each of the trays 3 trough-shaped screens 6, forming a quenching chamber 7 with a threshold 2 of the dam. The trough-shaped screen 6 includes a rear wall with shelves facing the dam of the upper 8 and lower 9. The bottom shelf has a slope in the direction of the dam and on it, with its uniform pitch, the walls are fixed with the walls, the shelves of which have the shape of trays installed with the same slope as the bottom shelf. In the upper part of the threshold there is an air supply channel 12 with a grill 13. A flow path is made under the screen, at the exit of which in an area with increased height there is a flow-divider 15 divider 15 with an upward slope. On the upper plane of the plate-divider placed checkers redistributors 16 flow height. 3 il.

Description

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Phie.1

The invention relates to hydropower construction and can be used in the spillways of high-pressure hydropower plants.

The purpose of the invention is to increase the efficiency and reliability of work.

Figure 1 shows the spillway dam, section; Fig. 2 is a view A of Fig. 1; Fig. 3 is a section BB in Fig. 1.

The spillway dam has body 1 and is made with a threshold 2 from the downstream. On the lower side of the dam are spillway trays 3, each of which is made with sides 4 and closures 5. A trough-shaped screen 6 is installed opposite each of the trays 3, forming a quenching chamber 7 with a threshold 2. The screen 6 is made with the top 8 and bottom 9 shelves, and the bottom shelf is made with a slope towards the dam and on it with equal pitch fixed with its walls 10 brands, the shelves of which are made in the form of trays 11. In the upper part of the threshold 2 the air supply channel 12 grid 13. Under the screen 6 there is a flow path 14, at the exit of which, in an area with increased height, a plate-divider 15 of the flow with checker redistributors 16 of flow is placed with an upward slope.

Spillway dam works as follows.

The shutter is opened in a particular dam tray and the water rushes down with increasing speed, is thrown from the dam towards the screen 6 and is deflected by a vertical wall downward due to meeting at an angle of less than 90 °. When falling, the stream is initially split by trays 11 of the Taurians, as a result of which one part of the flow of the upper light is turned and thrown toward the dam, and the other part of the stream slips the Taurus, collides with the bottom shelf 9 of the screen and spreads over the entire length of this shelf, deviates into the side of the dam and then strikes it a second time, but now with the threshold of the dam. In this case, the upper and lower Rus flows at different altitudes interact with the threshold 2 of the dam, thereby ensuring the impact of these

flows in the threshold zone with increased efficiency of extinguishing their energies. Further, the flow that has lost most of the energy with an uneven velocity in the flow

a path 14 under the screen runs onto a plate-divider 15 of the flow, the upper of which is additionally split by a checker redistributor 16 of the flow, also redistributing the divided flow along

height. This ensures alignment of the flow rates behind the extinguishers, thereby further reducing the length of the river bed attachment behind them and reducing costs and costs.

By supplying air to the quench zone, the water is saturated with atmospheric oxygen, which increases the self-cleaning ability of the river at the most intense moment of flushing from the entire territory.

organic pollution into it.

Claims (1)

An inventive spillway dam containing spillway trays located on the lower edge with sides and a shutter in each tray, characterized in that, in order to increase the economy and reliability of operation, the dam is made with a downstream threshold and is provided with a trough a screen forming a quenching chamber with the dam threshold and consisting of a rear vertical wall with the upper and lower shelves, and a regulating plate-divider with flow redistributors in height, with the lower shelf of the screen being inclined towards the dam and fixed on it with uniform pitch With their walls, brands whose shelves have the shape of trays installed with the same slope as the bottom shelf, an air supply channel with a grille is made in the upper part of the threshold, and a flow path is formed under the screen; plate-flow divider, on the upper plane of which the redistributors are discretely placed flow. $ W $$$ W $ & Fig 2 Figz ten P