SU1260436A1 - Water-receiving head of water intake structure - Google Patents

Description

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The invention relates to hydraulic engineering and water management construction and is intended for use in water supply systems based on rivers, to protect water intakes from sediments, sludge, Nfycopa and fish fry in them.

The purpose of the invention is to increase the effectiveness of erosion of bottom sediments along lateral faces due to the creation of induced velocity shields in the work zone.

FIG. 1 is a schematic diagram of the device, a plan for

, figs. 2 is the same side view in FIG. 3, section A-A in FIG. 2

The water intake cap 1 is made with parallel side edges 2, provided on the middle part with rigidly mounted transverse shields .3 with an angle of inclination to the horizontal axis of 0-30, water intake ports 4, a bell 5 and water lines 6. Arrows 7 show the direction of movement water in the intake

FIG. 2 is marked: OS - the angle of inclination of the shield to the flow axis h - the distance from the lower edge of the shield to

i bottom, L - is the length of the water-receiving tip.

FIG. 3 marked: tj ,, - the base of the shield adjacent to the side

J cc 4

/ / /

verge of water intake cap; at the base of the shield; x is the height of the shield.

Water intake works as follows.

When the flow rushes onto the trapezoidal shields 3, a continuous flow occurs due to the fact that the shields are rigidly set at an angle to the flow in the range of 0-30. Wherein

behind the shields, so-called free vortices are formed, contributing to the formation of vortex velocities, which, summing up with the speed of the oncoming river flow, increase the bottom velocities and ensure the erosion of the bottom sediments along the edges 2 of the water intake head 1. Water flows from the water flow into the water receiving windows 4, flows into the socket 5, then collected in conduits 6 and delivered to the consumer.

As a result of experimental data, the distance from the lower edge of the shield 3 to the bottom should be 0.01-0.5 the length of its base adjacent to the side face 2 of the water receiving head 1, the parallel sides of shield 3 have a base length ratio of 0-1; the ratio of the height of the shield 3 to the base adjacent to the side face 2 of the water receiving head 1 is 0.2-0.7.

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Editor M.Dshyn

Compiled by E.Moiseeva Tehred A.Kravchuk

Order 5196/24

Circulation 641 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader L. Pilipenko

Claims (1)

WATER ACCEPTANCE HEAD OF A WATER-INTAKE STRUCTURE located at the bottom of a watercourse and made with parallel side faces, on the surface of which transverse shields are installed in the middle part at an angle opposite to the flow, characterized in that, in order to increase the efficiency of erosion of bottom sediments along the side faces by creating vortex speeds, shields are rigidly attached to the side faces of the head and are made trapezoidal? with large bases facing the side face of the head, while the lower side edge of the boards is located at a distance from the bottom of the watercourse, equal to from 0.01 to 0.5 of the length of the larger base of the shield, and the angle of inclination of the shield relative to the horizon 'is from 0 to 30 ° . SU „, 1260436 FIG. 1 I