CN220746826U - Combined spillway energy dissipation facility - Google Patents
Combined spillway energy dissipation facility Download PDFInfo
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- CN220746826U CN220746826U CN202322503180.2U CN202322503180U CN220746826U CN 220746826 U CN220746826 U CN 220746826U CN 202322503180 U CN202322503180 U CN 202322503180U CN 220746826 U CN220746826 U CN 220746826U
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- 230000021715 photosynthesis, light harvesting Effects 0.000 title claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000010521 absorption reaction Methods 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 abstract description 10
- 238000005096 rolling process Methods 0.000 abstract description 5
- 238000005273 aeration Methods 0.000 abstract description 4
- 239000000725 suspension Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000006424 Flood reaction Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The utility model relates to the field of water conservancy and hydropower engineering, in particular to a combined spillway energy dissipation facility. The device comprises a drainage section, a stilling pool and stilling sills, wherein the drainage section is obliquely arranged, staggered steps are arranged on the inclined surface, the bottom of the inclined surface is connected with the water inlet end of the stilling pool, and the water outlet end of the stilling pool is connected with the stilling sills; the water inlet end of the stilling pool is provided with at least one row of stilling blocks, and the middle part of the stilling pool is provided with a plurality of suspended grids which are orderly arranged along the water flow direction. When the upstream of the utility model passes through the staggered steps, the water flow generates transverse diversion, the transverse diversion and the inclined plane water flow generate violent collision and rolling, the tail end of each step generates the jet water flow, the aeration concentration is increased, the effect of energy dissipation along the journey is achieved, after the energy dissipation block enters the absorption basin, the energy dissipation block is combined with the arrangement of the suspended grid, the flow state of the water flow in the absorption basin is stabilized, the water jump is fully generated at the front end of the absorption basin while the height of the water jump is restrained, and finally the state that the water flow enters the downstream is improved through the absorption ridge.
Description
Technical Field
The utility model relates to the field of water conservancy and hydropower engineering, in particular to a combined spillway energy dissipation facility.
Background
In a water conservancy junction, a spillway is a common spillway building, and is used for releasing flood which cannot be contained in a planned storage capacity, preventing flood from overflowing over a dam crest and ensuring safety of the dam. Spillways can be classified into normal spillways and very spillways according to flood discharge standards and operating conditions. Normal spillways are used to flood design floods, very spillways are used to flood very floods, and both normal spillways and very spillways are typically provided with energy dissipaters. Flood spillways are usually large in single-width flow, high in flow velocity and concentrated in energy. If the energy dissipation measures are not properly considered, the high-flow-rate water flow cannot be properly connected with the water flow of the downstream river, the downstream river bed and the bank slope can be washed away, and the safety of the dam is even endangered. The energy dissipater converts a part of kinetic energy in water flow into heat energy through a local hydraulic phenomenon, and dissipates the heat energy along with the water flow. The ways to achieve this energy conversion are: turbulence, blending, shearing and swirling in the water flow; diffusion of the water strands and collision between the water strands; intense friction and impingement of the water flow with the solid boundary; friction and blending of the water stream with the surrounding gas, etc.
However, the existing stilling pool still has the problems that turbulence and friction collision energy dissipation of the main flow in the water jump area are insufficient, so that downstream river channel water outlet is disturbed, and water surface fluctuation is large. In the prior art, the energy dissipation effect is achieved mainly through a single method, but the energy dissipation efficiency is limited, and no systematic consideration is given to the combination of the drainage section and the stilling pool section to stabilize the water flow state in the stilling pool.
Disclosure of Invention
In order to solve the problems, the utility model provides a combined spillway energy dissipation facility.
The technical scheme of the utility model is as follows: the combined spillway energy dissipation facility comprises a drainage section, a stilling pool and stilling silts, wherein the drainage section is obliquely arranged, staggered steps are arranged on the inclined surface, the bottom of the inclined surface is connected with the water inlet end of the stilling pool, and the water outlet end of the stilling pool is connected with the stilling silts; the water inlet end of the stilling pool is provided with at least one row of stilling blocks, and the middle part of the stilling pool is provided with a plurality of suspended grids which are orderly arranged along the water flow direction.
Each row of staggered stairs is formed by orderly staggered arrangement of stair convex parts and stair concave parts, and every two adjacent rows of stairs are also staggered.
The ladder bulge is cuboid, the ladder depressed part is right angle wedge.
And a first row of energy dissipation blocks and a second row of energy dissipation blocks are sequentially arranged along the water inlet end of the absorption tank, and the suspension grids in the middle of the absorption tank are uniformly and alternately distributed above the second row of energy dissipation blocks.
The energy dissipation block is a hollow square body, the four corners of the top surface are provided with convex parts, and the center of each surface is a hollowed-out part.
The cross section of the convex part is square, the water facing surface of the hollow square body and the bottom of one surface opposite to the water facing surface are transverse semi-cylinders, and the rest surfaces are square.
The suspended grid is of a cross structure, the cross section of the suspended grid is rectangular, and two ends of the suspended grid are connected with the side walls of the stilling pool.
The whole height of the stilling ridge is higher than the bottom of the stilling pool, and the top of the stilling ridge is provided with an arc surface at the upstream surface.
The beneficial effects of the utility model are as follows:
(1) The utility model is provided with the staggered steps on the inclined surface of the drainage section, water flow in the staggered steps generates transverse diversion, the transverse diversion and the water flow on the inclined surface generate severe collision and rolling, and the tail end of each step generates the jet water flow, so that the aeration concentration is increased, and the effect of along-path energy dissipation is achieved.
(2) The energy dissipation block is arranged at the front part of the energy dissipation pool, the energy dissipation block is provided with four convex parts, and is of a hollow structure, so that the transverse water flow and water passing capacity are increased, and the energy dissipation grooves are formed in the convex parts, so that the water flow in the grooves collides and rolls, and the kinetic energy of the water flow is consumed.
(3) The utility model is provided with a plurality of suspension grids in the middle of the stilling pool, so that the height of the hydraulic jump and the rolling distance are greatly reduced, the position of the hydraulic jump in the stilling pool is effectively controlled, and the effect of increasing the stability of the side wall is achieved. The stilling ridge effectively helps the tail end of the stilling pool to improve the flow state of water flowing into the downstream.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic perspective view of a drain section in an embodiment;
FIG. 3 is a schematic diagram of the overall top view of the embodiment;
FIG. 4 is a schematic diagram of the energy dissipating block structure in an embodiment;
FIG. 5 is a schematic diagram of a cross-type suspended gate structure in an embodiment;
FIG. 6 is a schematic view of a structure of a energy dissipation bank according to an embodiment;
the reference numerals in the drawings: 1-a drainage section; 1-1 a stepped boss; 1-2 step depressions; 2-energy dissipation blocks; 2-1 raised portions; 2-2 hollow parts; 3-hanging grid; 4-resolution Chi Bianqiang; 5-a stilling pool; 6-stilling ridge.
Detailed Description
The technical solutions of the embodiments of the present utility model will be further described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments.
Example 1: in the present utility model, for convenience of description, description of the relative positional relationship of each member in the members of the present utility model, the suspended gate connector is described according to the layout manner of fig. 1, for example: the upper, lower, left, right, front, rear, etc. positional relationship is determined in accordance with the layout direction of fig. 1.
As shown in fig. 1, the combined spillway energy dissipation facility provided by the utility model comprises a drainage section 1, a stilling pool 5 and stilling silts 6, wherein the drainage section 1 is obliquely arranged, staggered steps are arranged on the inclined surface, the bottom of the inclined surface is connected with the water inlet end of the stilling pool 5, and the water outlet end of the stilling pool 5 is connected with the stilling silts 6; the water inlet end of the absorption tank 5 is provided with at least one row of energy dissipation blocks 2, and the middle part of the absorption tank 5 is provided with a plurality of suspended grids 3 which are orderly arranged along the water flow direction.
In use, the combined spillway energy dissipation facility flows through the drainage section 1, the stilling pool 5 and the stilling ridge 6 in sequence and then flows into the downstream. Specifically, when the upstream passes through the staggered steps, the water flow generates transverse diversion, the transverse diversion and the inclined plane water flow generate violent collision and roll, the tail end of each step generates the jet water flow, the aeration concentration is increased, the effect of energy dissipation along the journey is achieved, when the water flow reaches the bottom of the drainage section 1, the water flow enters the stilling pool 5 from multiple flow states, and the state that the water flow enters the downstream is improved through the stilling ridge 6.
As shown in fig. 2, each row of staggered steps is formed by sequentially staggered arrangement of step raised parts 1-1 and step recessed parts 1-2, and two adjacent rows of steps are also staggered. The step bulge part 1-1 is a cuboid, and the step recess part 1-2 is a right-angle wedge body to form an inclined plane. The water flow in the staggered steps generates transverse diversion, the transverse diversion and the inclined plane water flow generate violent collision and rolling, the tail end of each step generates jet water flow, the aeration concentration is increased, and the effect of along-path energy dissipation is achieved.
As shown in fig. 3, a first row of energy dissipation blocks and a second row of energy dissipation blocks are sequentially arranged along the water inlet end of the absorption tank 5, and the suspension grids 3 in the middle of the absorption tank 5 are uniformly distributed above the second row of energy dissipation blocks at intervals. In this embodiment, the two rows of energy dissipation blocks are also staggered, and the number is not limited, and as shown in the figure, the first row is provided with two energy dissipation blocks 2, and the second row is provided with three energy dissipation blocks 2.
Specifically, as shown in fig. 4, the energy dissipation block 2 is a hollow square body, four corners of the top surface are provided with convex parts 2-1, and the center of each surface is a hollow part 2-2. The cross section of the convex part 2-1 is square, the water facing surface of the hollow square body and the bottom of the surface opposite to the water facing surface are transverse semi-cylinders, and the rest surfaces are square. The raised part 2-1 at the top of the energy dissipation block 2 forms an energy dissipation groove, and the hollow structure of the energy dissipation block 2 has large groove area, so that the collision space of water flow in the groove is increased, the water flow in the groove fully collides and rolls, the transverse water flow is increased to a certain extent, and the kinetic energy of the water flow is consumed.
As shown in fig. 5, the suspension grid 3 has a cross structure, is in a transverse elongated X shape, has a rectangular cross section, and two ends of the suspension grid 3 are connected with the side wall 4 of the stilling pool. The water flow collides and rubs between the suspended grids 3, so that the length of the water jump along the water flow direction is shortened, the height of the water jump and the rolling distance are greatly reduced, the position of the water jump in front of the absorption basin 5 is effectively controlled, downstream river channels are not influenced, and the effect of increasing the stability of the side wall 4 of the absorption basin is achieved.
As shown in fig. 6, the whole stilling ridge 6 is higher than the bottom of the stilling pool 5, the top of the stilling ridge 6 is provided with an arc surface at the upstream surface to form a quarter round top, the stilling ridge 6 and the water flow direction form an inclined plane to adjust the water outlet flow state, and the tail end of the stilling pool is effectively assisted to improve the flow state of the water entering the downstream. .
In summary, compared with the existing spillway energy dissipater, the utility model has the following advantages: (1) and the comprehensive energy dissipation facilities are changed from single energy dissipation to diversified energy dissipation. The energy dissipation device has a better energy dissipation effect, the staggered step energy dissipater is additionally arranged in the drainage section 1, the absorption block 2 and the suspended grid 3 are additionally arranged in the absorption tank 5, the along-path energy dissipation effect is achieved, the sufficient impact friction and turbulence of water flow in the absorption tank 5 are enhanced, the better energy dissipation effect is achieved, the distance and the height of the water jump in the tank along the water flow direction are shortened, and the water jump occurrence area is effectively controlled. (2) More stable water flow state: under the action of the suspended grid 3 in the stilling pool 5, the water flow does not generate huge fluctuation and the improved flow state of the quarter round stilling ridge 6 when reaching the outlet, so that the flow state is regulated to a great extent, and the influence of the water flow on the downstream is reduced; (3) the engineering quantity is reduced, and meanwhile, the stability of the side wall is guaranteed: the hydraulic jump occurrence area is controlled within the effective distance and the effective height through the combination of the energy dissipation block 2 and the suspension grid 3, the design length of the stilling pool 5 and the height of the stilling pool side wall 4 can be reduced, the investment is reduced to a certain extent, the cross-type suspension grid 3 structure not only ensures the stability of the self-body, but also increases the stability of the stilling pool side wall 4 to a certain extent.
Claims (8)
1. The combined spillway energy dissipation facility comprises a drainage section, a stilling pool and stilling silts, and is characterized in that the drainage section is obliquely arranged, staggered steps are arranged on the inclined surface, the bottom of the inclined surface is connected with the water inlet end of the stilling pool, and the water outlet end of the stilling pool is connected with the stilling silts; the water inlet end of the stilling pool is provided with at least one row of stilling blocks, and the middle part of the stilling pool is provided with a plurality of suspended grids which are orderly arranged along the water flow direction.
2. The combined spillway energy dissipation facility of claim 1, wherein each row of staggered steps is formed by sequentially staggered arrangement of step raised parts and step recessed parts, and the adjacent two rows of steps are also staggered.
3. The combined spillway energy dissipation device of claim 2, wherein the stepped protrusion is a cuboid and the stepped depression is a right angle wedge.
4. The combined spillway energy dissipation facility of claim 1, wherein a first row of energy dissipation blocks and a second row of energy dissipation blocks are sequentially arranged along the water inlet end of the absorption basin, and the suspended grids in the middle of the absorption basin are uniformly and alternately distributed above the second row of energy dissipation blocks.
5. The combined spillway energy dissipation facility of claim 1 or 4, wherein the energy dissipation block is a hollow square body, raised portions are arranged on four corners of the top surface, and the center of each surface is a hollowed-out portion.
6. The combined spillway energy dissipation device of claim 5, wherein the cross section of the convex portion is square, the upstream surface of the hollow square body and the bottom of the surface opposite to the upstream surface are transverse semi-cylinders, and the rest surfaces are square.
7. The combined spillway energy dissipation facility of claim 1 or 4, wherein the suspended grid is of a cross-shaped structure, the cross section of the suspended grid is rectangular, and two ends of the suspended grid are connected with side walls of the stilling pool.
8. The combined spillway energy dissipation facility of claim 1, wherein the energy dissipation ridge is integrally higher than the bottom of the energy dissipation tank, and the top of the energy dissipation ridge is provided with an arc surface at the upstream surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322503180.2U CN220746826U (en) | 2023-09-14 | 2023-09-14 | Combined spillway energy dissipation facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322503180.2U CN220746826U (en) | 2023-09-14 | 2023-09-14 | Combined spillway energy dissipation facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220746826U true CN220746826U (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322503180.2U Active CN220746826U (en) | 2023-09-14 | 2023-09-14 | Combined spillway energy dissipation facility |
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| Country | Link |
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| CN (1) | CN220746826U (en) |
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2023
- 2023-09-14 CN CN202322503180.2U patent/CN220746826U/en active Active
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