SU1486560A2 - Water intake structure of damless type - Google Patents

Description

The invention relates to hydraulic structures and can be used for the dam intake of lowland rivers. The purpose of the invention is the reduction of material

and improving operating conditions. Bottomless water intake structure includes a water intake channel 1 with slopes - upper and lower 2.

about

angled 120-150 to ι

2

direction of flow of the river. At the entrance to the channel 1, there is a non-flooded split threshold 4 with slots 5, teeth 6 and guiding walls

7. At threshold 4, adjacent to the lower slope 3, it is made from an uphill slope 2 opening 8 with a width not exceeding 0.23-0.27 of the threshold length 4. Threshold 4, set at the entrance to ka-® cash 1, causes local increase the water level extends to a part of the channel flow, which causes the formation of circulation currents in the river, deflecting the bottom stream streams saturated with sediment from the entrance to the channel 1. Opening 8 provides passage for the channel 1 of ships and sump suction installations, which improves the operating conditions of the water intake channel 1 Making the opening 8 wide 0.23-0.27 of the length of the threshold 4 does not reduce the nanoprotective flow-leveling qualities of the threshold 4. 3 Il.

but

The invention relates to hydraulic structures, can be used for the dam intake of ^{* 1} lowland rivers and is an improvement of the intake dam type structures by author. Saint Number 1044726.

The purpose of the invention is to reduce material consumption and improve operating conditions.

Figure 1 shows the water intake

construction in the plan; figure 2 - view

And in figure 1; on fig.Z - water intake

construction in axonometry.

A free-of-water intake structure includes a water intake channel 1 with slopes: upper 2 and lower 3, located at an angle of 120-150 ° to the direction of the river flow. On _; the entrance to the channel 1. there is a non-flooded split threshold 4 with slots 5, teeth 6 and guide walls 7. The threshold 4 in the plan is made straight and is adjacent to the lower slope 3, from the upper slope 2 to 0.23-0.27 width of the threshold 4 (width of the water intake front) made an opening 8 for the passage of ships,

00

£ D

>

TO)

3

1486560

four

suction dredgers, dredgers and other floating facilities. The threshold 4 has a constant height, the slots 5 in it are made to the level of the bottom of channel 1 and are parallel to its axis. Behind the threshold 4 there are guiding walls 7, adjacent to the teeth 6 of the threshold 4 parallel to the axis of the channel -1. The input ends of the teeth 6 are parallel to the direction of the threshold 4, and their end ends are perpendicular to the axis of the channel 1,

The width of the slots 5 in the threshold 4 with respect to the width of the threshold 4 varies within 0.60-1.75 at the angles of the outlet 120-150 °.

The width of the threshold-4 is determined by calculations in the design process for specific conditions. The distance between the guide walls 7 is within two tooth lengths 6 ..

Water intake works as follows.

Threshold 4, installed at the entrance to channel 1, being a hydraulic resistance in the path of the exhaust stream. in channel 1 towards the river.

In addition, the front edges of the teeth 6 and the direction of the slits allow you to effectively protect the channel 1 from the ingress of ice floes, sludge and floating debris.

The split threshold 4 and the guide walls 7 also serve for the regulatory action, causing the redistribution and equalization of the flow rates and specific flow rates of water across the width of channel 1, which is a condition

ensure favorable hydraulic mode of channel 1 ..

Split threshold 4 is the protection of channel 1 from wind and ship waves on the river.

The opening 8 for the passage of ships and the ground of pine installations, made from uplift slope 2 of width up to 0.2310 0.27 threshold length 4, does not reduce within these limits the protective and leveling qualities of threshold 4 and at the same

. time greatly improves the operating conditions of the structure.

15 An increase in the width of opening 8 to more than 0.23–0.27 of the length of threshold 4 leads to a sharp decrease in the overall performance of the structure due to a significant increase in the flow into channel 1

20 suspended sediments and deterioration of flow conditions beyond the threshold 4.

In this water intake structure, the conditions of operation of channel 1 beyond threshold 4 are improved, since they create

Conditions for the free passage of suction units for cleaning channel 1 from sediments are compiled. In addition, the presence of opening 8 makes channel 1 not only water intake, but also navigable

30 i.e. multifunctional, and reduces the material intensity of the building in the shop by reducing the length of the threshold 4.

Claims (1)

Claim 35 Bottomless water intake structure according to ed. St. No. 1044726, k that is kicking by the fact that, in order to reduce material consumption and improve operating conditions, in the threshold of the upper slope of the water intake channel for the passage of ships and floating facilities, an opening width not exceeding 0.23-0.27 ^: threshold. 1486560 Phie.1 Type A 7 4 \, ηππΥι five R | bn 1 p p 1 rut " I I 1 FIG. g. [F T | T | gr p | gut ” River Fig.Z