SU1232739A1 - Spillway of hydraulic structure - Google Patents

Description

FIELD OF THE INVENTION The invention relates to hydraulic engineering, in particular to shaft spillways of high-pressure dams.

The purpose of the invention is to increase the reliability of work and simplify the design due to the possibility of making a diversion tunnel with an arbitrary cross section.

Figure 1 shows the spillway, a vertical section along the axis; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1.

The spillway includes the supply conduit 1, which passes into the spiral chamber 2, which adjoins the shaft of the shaft 3. In the lower part of the shaft 3 there is a deflector 4. Mine 3 is connected to a diversion tunnel 6 by the bend 5 on the concave surface The elbows 5 opposite the deflector 4 have longitudinal ribs 7, which are a flow twisting device. The ribs 7 can be directed at an angle to the cylindrical surface of the knee 5 in such a way as to increase the angle of meeting of the longitudinal axis of the ribs 7 and the resultant direction of the flow velocity at the beginning of the knee 5. In this case, for example, When the flow in shaft 3 rotates clockwise, the upper ends of the ribs

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7 in the plan will be located to the left of the lower ends.

Spillway works as follows.

5 Ip discharge of water through a spillway swirled in the spiral chamber 2, the stream approaches the knee 5 with a resultant velocity directed at an angle to the longitudinal ribs 7.

1 (Due to the presence of the deflector 4, the flow at the end of the shaft 3 is vaporized and from under the deflector flows in a continuous stream onto the concave surface of the elbow 5.

15 Due to the presence of the ribs 7, the swirling flow acquires a longitudinal direction along the knee 5. The inclination of the ribs 7 and the resulting horizontal projections 8 Spo2 {) contribute to a more intensive unwinding of the flow.

In the discharge tunnel 6, the flow comes out in a compact stream with the direction

speed along the tunnel. In tunnel 6, the flow flows without bias with a horizontal free surface. The aeration of flow in tunnel 6 takes place through the airspace.

melody flow and ceiling tunnel 6 or through a special duct (until 31 a).

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FIG. five

Editor P. Cossey

Compiled by A. Sergeev

Tehred V. Kadar Proofreader S. Shekmar

Order 2743/30 Circulation 641 Subscription of the USSR State Committee

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

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

Claims (1)

WATER DISCHARGE OF A HYDROTECHNICAL STRUCTURE, including an inlet water conduit, a spiral chamber, a shaft of a shaft with a deflector, an elbow and an outlet tunnel, distinguishing, in that, in order to increase the reliability of operation and simplify the design due to the possibility of an outlet tunnel with an arbitrary cross section, it equipped with a spin-up device made in the form of longitudinal ribs located on the concave surface of the knee opposite the deflector. <t