RU1824474C - Spillway - Google Patents

Abstract

The invention relates to hydraulic engineering, in particular to high-pressure spillway structures. The purpose of the invention is to increase work efficiency. The outlet conduit is provided with / a transitional sex tube 4, by means of which both sections of the water conduit - the initial 3 and the end 5 - are interconnected, and the transition section 4 is made expandable towards the downstream with an extension angle on one side not exceeding the angle of contact of the shaft with a twisting device 2 in the plane of the cross-section of the twisting device 2. The execution of the end section of the outlet conduit with a cross section, for example rectangular, square or triangular, can dramatically reduce the length twater conductive conduit without reducing its blanking properties, and increase the economic benefits at the expense of a significant reduction obyma construction work. 2 ill. (L C - ± 3 00 th fc 2 l .h. Vsxs::, ts Fig

Description

FIELD OF THE INVENTION This invention relates to hydraulic structures designed to pass large volumes of water and quench its energy.

The purpose of the invention is to increase the efficiency of energy suppression and the reliability of the structure,

In FIG. 1 shows a spillway, in a section; in FIG. 2 - section 1-1, 2-2, 3-3,4-4 pa of FIG. 1.

The spillway includes a shaft 1, swirling the flow of the device 2, installed B at the junction of the shaft 1 with the initial section 3 of the outlet duct, made of a cylindrical shape, the transition section A, expanding towards the downstream, the end section 5 of the outlet oodovod, through the transition Section 1, both sections of the water conduit - the initial 3 and the end 5 are interconnected.

Spillway works as follows.

The flow of water, the passage through the swirling device 2 acquires a swirling movement, moves first along the initial section 3 of the water iodine, then enters the transition section 4 and the end section 5 of a non-circular section. The flow in such a spillway is extremely stable, and the quenching effect is achieved due to the deformation of the swirling flow and the formation of secondary vortex structures of a smaller scale in the zone between the central vortex flow and the walls of the water conduit. The execution of the end section of the outlet conduit with a cross section, excellent

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The distance from a round one, for example, rectangular, square or triangular, makes it possible to drastically reduce the length of the outlet conduit without decreasing its damping properties.

In order to prevent the occurrence of tear-off currents in the transition section 4, the angle of its expansion towards the downstream side on one side is limited by the angle of contact of the shaft with the twisting device in the plane of its cross section.

The use of the spillway of the proposed design makes it possible to very efficiently solve the problems of optimizing the layout of the main structures of hydroelectric facilities and in many cases gives a large economic effect due to a significant reduction in the volume of construction work in comparison with options with spillways of a traditional type.

Claims (1)

The claims A spillway including a movable water conduit, a shaft, a twisting device, a water discharge conduit comprising a cylindrical start and end sections, characterized in that that, in order to increase efficiency in operation, the outlet conduit is equipped with a transition section connecting its initial and end sections, while the transition section is made expanding towards the downstream with an expansion angle on one side not exceeding the angle of contact of the shaft with the twisting device in the plane of the cross section of a twisting device.