SU1434024A1 - Water spillway - Google Patents

Abstract

The invention relates to hydraulic engineering, in particular, to devices for discharging water from the upstream of a hydraulic structure to a downstream. The purpose of the invention is to simplify the design and ensure reliable operation. The spillway contains a trench narrowing in terms of supply channel 2, a visor beam 3 with a goat 4, with a connecting conduit made with bottom 6, toe-springboard 7, threshold 9, walls 10 and 11, and a round shaft 12 Output section 13 This argument has the shape of a trapezoid, which is inscribed in the circle of mine section 12 with the formation of segmental benches 14. Under the ledges 14 and the toe-ramp 7 there are air ducts 15 and 8 connected to the atmosphere. Water from trench 1 through channel 2 and the mating section is discharged into shaft 12. Sock-springboard 7 creates a water cushion in the mating section, and the water, leaving the section 13 with a compact trapezoidal jet, does not touch the walls of the shaft 12, is discharged into downstream hydraulic structure. 2 hp f-ly, 2 ill. (L

Description

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1 1434024

It refers to hydraulic structures for the upstream in the lower 10 of the seawater.

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The purpose of the invention is to simplify the design and increase reliability.

Figure 1 shows the spillway, a longitudinal vertical section; in FIG. 2, view A in FIG. 1.

The spillway contains a trench 1, a supply channel 2, a suction beam 3 with a visor 4 of elliptical or circular shape, a dividing wall 5, a connecting conduit narrowing in plan, made with a curved convex bottom 6, with a toe-springboard 7 and air ducts 8, with a threshold 9 and flat vertical side 10 and rear It walls, and a circular shaft 12. The bottom 6 to the walls 10 and 11 form a trapezoidal cross section 13 in the outlet part of the connecting conduit, the corner points of which are located on the walls of the shaft 12 dressing 14, by which the cavity 15 communicated with air ducts 8 connected in turn to the atmosphere. The visor 4 of the beam 3 faces the wall 11. Trench 1 can be made with two and three spillway walls. Bottom 6 is made along the outline of the lower part of the jet of water, and for simplicity it can be filled with broken lines.

Spillway works as follows.

The water flow enters trench 1 and through channel 2 and the connecting duct is discharged into shaft 12. At low flow rates, water at the expense of threshold 9 is evenly distributed over the width of the conduit. When calculating the costs, beam 3 is put into operation, which aligns the consumption of water along the width of the argument by flooding trench 1. The presence of beam 3 prevents the formation of craters and oblique waves at the bottom 6,

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due to the constricting walls 10 and partially conveyed from the trench 1 of the helical flow movement. The sock 7 rejects the stream of water against the wall 1 1 and creates a water cushion that eliminates the breakthrough of air into the shaft 12. Next, the stream leaves section 13 in the form of a compact stream of trapezoidal cross section without touching the walls of the shaft 12.

Claims (3)

1. A spillway, including a supply channel, connected to a vertical circular shaft with an adjoining conduit, which is narrower in length, has flat vertical side walls, a curved, convex bottom and a vertical rear wall, in order to simplify the design and improving the reliability of operation, it is equipped with air ducts, the inlets of which are connected to the atmosphere, the bottom of the connecting duct is made with a toe-springboard, and the rear wall of the connecting duct is flat and forms laterally E walls and the bottom in the outlet portion a coupling conduit trapezoidal horizontal cross-section, wherein its angular point located on the shaft walls to form a segment of ledges and outlets ducts located behind the toe segment and a springboard-ledges. 2.Water discharge according to claim 1, characterized in that a visor beam with a curved in a vertical plane visor facing the rear wall of the connecting conduit is installed in front of the mating conduit. 3.Water discharge according to pps1 and 2, which is provided by the fact that it is provided with a longitudinal dividing wall installed between the visor and the bottom. View / j f ag.2