CN217580021U - Arc-shaped force dissipation wall at outlet of flood discharge tunnel - Google Patents
Arc-shaped force dissipation wall at outlet of flood discharge tunnel Download PDFInfo
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- CN217580021U CN217580021U CN202221043490.XU CN202221043490U CN217580021U CN 217580021 U CN217580021 U CN 217580021U CN 202221043490 U CN202221043490 U CN 202221043490U CN 217580021 U CN217580021 U CN 217580021U
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- outlet
- stilling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
本实用新型公开了一种泄洪洞出口处的弧形消力墙，在泄洪洞的出口处的河床上设置弧形消力墙，弧形消力墙位于泄洪洞出口靠岸边的位置，该弧形消力墙设有弧形面，该弧形消力墙的横截面呈“直角三角形”结构，直角三角形的斜边为弧形，弧形面为引流面，从泄洪洞下泄的高速水流，通过弧形过水断面改变下泄水流方向，将高速水流的方向改向河道内部，而后与另一个泄洪洞出口下泄的高速水流进行碰撞，使水流相互对冲。本实用新型结构比较简单，通过弧形消力墙改变下泄水流方向，再通过水流互相对冲，使水流强烈紊动、剪切和掺混，达到消能的目的，具有很好的实用性。
The utility model discloses an arc-shaped stilling wall at the outlet of a flood-discharge tunnel. The arc-shaped stilling wall is arranged on the river bed at the outlet of the flood-discharging tunnel. The arc-shaped stilling wall is provided with an arc-shaped surface. The cross-section of the arc-shaped stilling wall is a "right-angled triangle" structure. The hypotenuse of the right-angled triangle is arc-shaped, and the arc-shaped surface is the drainage surface. , through the arc-shaped water-passing section to change the direction of the discharge flow, redirect the direction of the high-speed water flow to the inside of the river, and then collide with the high-speed water flow discharged from the outlet of another flood discharge tunnel, so that the water currents collide with each other. The utility model has a relatively simple structure. The arc-shaped stilling wall is used to change the direction of the downflow water flow, and then the water flows counteract each other, so that the water flows are strongly turbulent, sheared and mixed to achieve the purpose of energy dissipation and have good practicability.
Description
Technical Field
The utility model relates to a hydraulic and hydroelectric engineering field, concretely relates to arc power dissipation wall in flood discharge tunnel exit.
Background
In water conservancy and hydropower engineering, the high-speed water flow energy dissipation of the downward drainage of a drainage outlet is always a difficult problem in water conservancy engineering, and mainly comprises bottom flow energy dissipation, trajectory energy dissipation and surface flow energy dissipation, an independent energy dissipation mode and a mixed energy dissipation mode are adopted, and a corresponding energy dissipation facility and an anti-scouring facility are adopted to protect a river bed and a bank slope depending on the energy to be consumed in the downward drainage high-speed water flow. The working principle of underflow energy dissipation is that a stilling basin, a stilling ridge and the like are arranged at the downstream of a dam site to promote water flow to generate hydraulic jump within a limited range, and energy is consumed through internal friction, aeration and impact of the water flow. But the downstream scouring is more serious, the deposit is more, and the fluctuation and atomization of tail water are larger. The underflow energy dissipation makes the downward flow rapid change into slow flow, generally can eliminate 40% -70% of the kinetic energy of the downward flow, it is an effective and economic energy dissipation facility. Although the bottom flow energy dissipation is reliable, the problems of large engineering quantity and complex construction exist by combining the energy dissipation through the stilling piers in various shapes, and the construction cost is high. The trajectory jet energy dissipation can effectively control the position, range and wave distribution of jet flow falling into a downstream riverbed through the bucket, and has strong adaptability to tail water amplitude variation, simple structure, convenient construction and maintenance and low construction cost. The surface flow energy dissipation is an energy dissipation mode that a main flow of a downward-discharging rapid flow is picked to the water surface by using a drop sill or a scoop at the tail end of a water discharging structure, and the surplus energy is eliminated through surface diffusion, bottom rolling and surface rolling of the main flow. However, the water surface fluctuates greatly and extends far downstream, which has adverse effects on the stability of the bank slope, the operation of the power station and the downstream shipping conditions. In recent years, the number of large energy dissipation patents is too large, so that the energy dissipation effect of technicians is not obvious in all aspects.
SUMMERY OF THE UTILITY MODEL
The utility model provides an arc wall that disappears in flood discharge hole exit, the utility model discloses an export at the flood discharge hole and set up arc wall structure that disappears to it is not obvious to solve the effect of disappearing, and the engineering construction volume is big, the many problem of engineering cost.
The technical scheme of the utility model as follows: the river bed at the outlet of the flood discharge hole is provided with an arc-shaped dissipating wall, the arc-shaped dissipating wall is positioned at the position close to the bank side of the outlet of the flood discharge hole, the arc-shaped dissipating wall is provided with an arc-shaped surface, the upper part of the arc-shaped surface is narrow and the lower part of the arc-shaped surface is wide, one end close to the outlet of the flood discharge hole is narrow, the lower end of the arc-shaped dissipating wall is wide, the cross section of the arc-shaped dissipating wall is in a right-angled triangle structure, the bevel edge of the right-angled triangle is arc-shaped, the direction of high-speed water flow discharged from the flood discharge hole is opposite to the arc-shaped surface of the arc-shaped dissipating wall, the arc-shaped surface is a drainage surface, the high-speed water flow discharged from the flood discharge hole changes the direction of the discharged water flow through the arc-shaped water passing section, the direction of the high-speed water flow is changed to the inside of a river channel, and then collides with the high-speed water flow discharged from the outlet of another flood discharge hole, so that the water flows are opposite to each other, and further dissipate energy.
An included angle is formed between the arc-shaped surface of the arc-shaped stilling wall and the bank slope, and the included angle is 30 to 60 degrees.
The downstream end of the arc-shaped force dissipation wall is vertical to the bank slope.
When flood discharge tunnels are arranged on the left and right sides of the river channel, arc-shaped force dissipation walls are arranged on the two sides of the river channel.
The width of the arc-shaped force dissipating wall is equal to the farthest distance between the flood discharging tunnels arranged on the left and the right of the river channel.
The height of the arc-shaped force dissipating wall is consistent with that of the flood discharge tunnel.
The arc-shaped surface of the arc-shaped force dissipation wall is vertical to the horizontal plane.
The arc-shaped surface of the arc-shaped stilling wall forms an included angle with the horizontal plane, and the angle is more than or equal to 30 degrees. The smaller the included angle between the cambered surface and the horizontal plane is, the larger the engineering quantity is, so the angle is more than or equal to 30 degrees.
The utility model has the advantages that:
(1) The utility model discloses simple structure, construction convenience, energy dissipation are efficient, make and let out high-speed rivers collision of offset each other down, make rivers in strong turbulence, shearing and mixing, reach the purpose of energy dissipation.
(2) The utility model discloses have the effect that shortens stilling pool length, reduces the engineering volume, reduces the engineering cost, have fine practicality.
Drawings
FIG. 1 is a plan view of the arc-shaped stilling wall arranged on the left and right sides of the utility model;
FIG. 2 is a plan view of the arc-shaped stilling wall with single side arrangement of the present invention;
FIG. 3 is a perspective view of the arc-shaped stilling wall with the arc surface perpendicular to the horizontal plane;
FIG. 4 is a perspective view of the arc-shaped stilling wall of the present invention, in which the arc surface has an angle with the horizontal plane;
the reference numbers in the figures: 1-arc-shaped stilling wall, 2-flood discharge tunnel, 3-riverbed and 4-bank slope.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
1. Example 1: as shown in fig. 1 and 3, the arc-shaped dissipating wall at the outlet of the flood discharging tunnel is characterized in that an arc-shaped dissipating wall 1 is arranged on a riverbed 3 at the outlet of a flood discharging tunnel 2, the arc-shaped dissipating wall 1 is positioned close to the bank side of the outlet of the flood discharging tunnel, the arc-shaped dissipating wall 1 is provided with an arc-shaped surface, the arc-shaped surface is narrow at the top and wide at the bottom, one end close to the outlet of the flood discharging tunnel is narrow at the bottom, the downstream end is wide at the bottom, the arc-shaped surface of the arc-shaped dissipating wall 1 forms an included angle with a bank slope 4, the included angle is 30 degrees, the downstream end of the arc-shaped dissipating wall 1 is perpendicular to the bank slope 4, the width of the arc-shaped dissipating wall 1 is equal to the farthest distance from the flood discharging tunnel 2 arranged at the left and right of the river channel, the height of the arc-shaped dissipating wall 1 is consistent with the height of the flood discharging tunnel 2, the arc-shaped surface of the arc-shaped dissipating wall 1 is perpendicular to the horizontal plane, the oblique side of the right-angled triangle, the arc-angled triangle is formed by the arc-shaped surface, the arc-shaped dissipating wall 1, the high-shaped flow direction of the high-speed water discharged from the flood discharging tunnel 2 faces the arc-shaped water flow, the arc-shaped dissipating wall is changed to the inner direction of the river channel, and then the flood discharging tunnel, the high-speed water flow is guided to flow, and the high-speed water flow, and the inner direction of the flood discharging tunnel, and the river channel, and the flood discharging tunnel, and the high-speed water flow is changed to flow.
The working process of the embodiment is as follows: the high-speed water flow discharged from one flood discharge hole 2 passes through the arc-shaped stilling wall 1, the discharge direction of the water flow is changed, the high-speed water flow which is discharged from the other flood discharge hole and does not change the direction collides with the high-speed water flow which is discharged from the other flood discharge hole, the water flows collide with each other and are oppositely flushed, the oppositely flushed water flows are strongly disordered and sheared, and the purpose of energy dissipation is achieved.
Example 2: the structure of the embodiment is the same as that of embodiment 1, except that, as shown in fig. 2, flood discharging tunnels 2 are arranged on the left and right sides of the river channel, so that arc-shaped stilling walls 1 are arranged on both sides of the river channel, as shown in fig. 4, an included angle is formed between an arc-shaped surface of each arc-shaped stilling wall 1 and a bank slope 4 and is 60 degrees, and an included angle is formed between an arc-shaped surface of each arc-shaped stilling wall 1 and a horizontal plane and is 50 degrees.
The working process of the embodiment is as follows: the high-speed water flow discharged from the left flood discharging hole 2 passes through the arc-shaped stilling wall 1, the discharge direction of the water flow is changed, the high-speed water flow which is discharged from the outlet of the other flood discharging hole 2 and does not change direction collides with the high-speed water flow which is discharged from the outlet of the other flood discharging hole 2 and is not changed in direction, the water flows collide and impact with each other, and after energy dissipation is simultaneously carried out on the right side, the discharged water flows on the left side and the right side are in the middle of a river channel and collide again to generate disorder and shearing, so that the purpose of secondary energy dissipation is achieved.
The present invention is not limited to the above embodiments, and modifications, substitutions and variations can be made without departing from the spirit and principles of the present invention within the knowledge of those skilled in the art.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221043490.XU CN217580021U (en) | 2022-05-05 | 2022-05-05 | Arc-shaped force dissipation wall at outlet of flood discharge tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221043490.XU CN217580021U (en) | 2022-05-05 | 2022-05-05 | Arc-shaped force dissipation wall at outlet of flood discharge tunnel |
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| Publication Number | Publication Date |
|---|---|
| CN217580021U true CN217580021U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221043490.XU Expired - Fee Related CN217580021U (en) | 2022-05-05 | 2022-05-05 | Arc-shaped force dissipation wall at outlet of flood discharge tunnel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116657564A (en) * | 2023-06-12 | 2023-08-29 | 扬州大学 | A water outlet pool stilling device and method for smoothing water flow thereof |
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2022
- 2022-05-05 CN CN202221043490.XU patent/CN217580021U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116657564A (en) * | 2023-06-12 | 2023-08-29 | 扬州大学 | A water outlet pool stilling device and method for smoothing water flow thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20221014 |