CN110541409B - Novel stilling pool structure for automatically discharging sand and stone in guide pool by utilizing water flow effect - Google Patents
Novel stilling pool structure for automatically discharging sand and stone in guide pool by utilizing water flow effect Download PDFInfo
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- CN110541409B CN110541409B CN201910823278.1A CN201910823278A CN110541409B CN 110541409 B CN110541409 B CN 110541409B CN 201910823278 A CN201910823278 A CN 201910823278A CN 110541409 B CN110541409 B CN 110541409B
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- diversion
- water flow
- stilling pool
- pool
- drainage groove
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000000694 effects Effects 0.000 title claims description 8
- 239000004575 stone Substances 0.000 title abstract description 10
- 239000004576 sand Substances 0.000 title abstract description 6
- 238000007599 discharging Methods 0.000 title description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 20
- 239000013049 sediment Substances 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Barrages (AREA)
Abstract
The invention discloses a novel stilling pool structure for automatically draining sand in a stilling pool by utilizing the action of water flow. The invention changes the water flow condition in the tank by utilizing the diversion hole and the diversion gallery in the energy dissipation tail sill, automatically pumps and discharges sediment in the tank to the discharge groove, and the large and small stones in the tank are discharged outside the tank from the discharge groove under the action of water flow.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a novel stilling pool structure for automatically draining sand and stone in a guide pool by utilizing the action of water flow.
Background
The underflow energy dissipation is a common flood discharge energy dissipation mode of a hydropower station dam, an energy dissipation tank is arranged at the downstream of the dam, the tank head is smoothly connected with the overflow surface of the dam by adopting an arc-shaped section, an energy dissipation tail bank is arranged at the tank tail, and the length of the energy dissipation tank is determined through an empirical formula so as to ensure that a submerged water leap is formed in the tank, thereby achieving the purpose of energy dissipation and impact prevention.
Under the action of high-speed water flow, the absorption tank is worn and damaged by the abrasion of the sediment and the stone in the tank for a long time, and the bottom plate concrete of the absorption tank will be worn and damaged, so that the absorption tank is damaged even when serious, and the absorption tank is extremely unfavorable for the safety of a hydropower station flood discharge absorption system and a dam.
Patent documents of sediment in the drainage and dissipation pond are as follows: 200920198594.6, a wide-tail pier falling sill bottom flow energy dissipation structure. The gap is reserved at intervals on the energy dissipation tail pier, and although the water flow can be utilized to drain and guide sediment, due to the fact that the width of the energy dissipation tail pier is reduced more, submerged hydraulic jump can not be formed, the energy dissipation effect of the energy dissipation tail pier is greatly reduced, and the underflow energy dissipation effect is poor.
As another example 201710121313.6, a power dissipation Chi Wei ridge structure for sand removal by bottom hole is provided. According to the structure, the bottom hole is arranged on the energy dissipation tail ridge, the flap door is arranged on the bottom hole, and the purposes of energy dissipation and sediment discharge in the guide pool are achieved by opening and closing the flap door. However, the technology has a complex structure, and under the action of high-speed water flow, the auxiliary structures such as the flap gate and the spring are extremely easy to damage, which is unfavorable for the long-term operation of the stilling pool, and the maintenance cost of the flap gate is increased intangibly.
Disclosure of Invention
The invention aims to solve the problems that: by adopting the novel stilling pool structure, the sediment and the large stones in the stilling pool are automatically discharged and guided by changing the flow state of water under the condition that the stilling effect is not affected, so that the probability of abrasion damage of the concrete on the bottom plate of the stilling pool is reduced to the minimum, and the defect treatment investment of a flood discharge system is greatly reduced.
The technical scheme of the invention is as follows: the left side or the right side of the tail part of the stilling pool is provided with a drainage groove, the drainage groove adopts a diversion structure, the energy dissipation tail sill is provided with diversion holes, the diversion holes are arranged at intervals from large to small, the diversion holes are smaller when the diversion holes are closer to the drainage groove, and the water flow is communicated with the drainage groove through a diversion gallery after entering the diversion holes.
Because the width of the drainage groove is limited, the novel stilling pool structure basically does not change the stilling effect of the original stilling pool, but can automatically pump and drain sediment in the stilling pool to the drainage groove by utilizing the diversion hole and the diversion gallery in the stilling sill (the smaller the diversion hole is, the larger the flow velocity in the hole is, so that the water flow automatically flows towards the direction of the drainage groove), the stones with the size in the stilling pool are discharged outside the stilling pool from the drainage groove under the action of the water flow, after the stones in the stilling pool are reduced, the basic factors of concrete abrasion are cut off, the probability of abrasion damage of the stilling pool is greatly reduced, and meanwhile, the investment of defect treatment of a flood discharge stilling system is reduced to the minimum.
The invention has the beneficial effects that: the invention changes the water flow condition in the tank by utilizing the diversion hole and the diversion gallery in the energy dissipation tail sill, automatically pumps and discharges sediment in the tank to the discharge groove, and the large and small stones in the tank are discharged outside the tank from the discharge groove under the action of water flow.
Drawings
FIG. 1 is a three-dimensional isometric view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
fig. 4 is a C-C cross-sectional view of fig. 1.
Reference numerals illustrate: 1-a bottom plate of a stilling pool, 2-an energy dissipation tail ridge, 3-a diversion hole, 4-a drainage groove, 5-a side wall, 6-a dam overflow surface and 7-a diversion gallery.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The novel stilling pool structure adopting water flow to automatically discharge sand and stone in the guide pool is shown in the following figures 1-4, the stilling pool is arranged at the downstream of a dam, the pool head adopts an arc-shaped section to smoothly connect with the overflow surface 6 of the dam, and the main design key points are as follows: the left side or the right side of the tail part of the stilling pool bottom plate 1 is close to the side wall 5, the stilling pool bottom plate 1 is provided with the drainage groove 4, the drainage groove 4 adopts a diversion structure, the stilling pool bottom plate 2 is provided with the diversion holes 3, the diversion holes are arranged at intervals from large to small, the diversion holes are smaller when the stilling pool bottom plate is close to the drainage groove, and the water flow is communicated with the drainage groove 4 through the diversion gallery 7 after entering the diversion holes.
The width of the drainage groove 4 of the structure can be determined according to the total width of the stilling pool, 1/10-1/15 of the total width of the stilling pool can be generally taken, the size of the diversion gallery 7 is selected according to the size of the stilling sill 2, 2m multiplied by 2.5m (width multiplied by height, urban gate opening type) can be generally taken, the maximum size of the diversion hole 3 is matched with the diversion gallery 7, and the minimum size is not less than 0.5m, so that the automatic drainage effect of water flow is ensured.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (1)
1. The utility model provides a novel stilling pool structure of grit in guiding pond is arranged by oneself to rivers effect, includes stilling pool, and the pond head adopts reverse arc section and dam overflow surface (6) smooth-going to link up, its characterized in that: arranging a drainage groove (4) on the left side or the right side of the tail part of the stilling pool, wherein the drainage groove (4) adopts a diversion structure, the energy dissipation tail sill (2) is provided with diversion holes (3), the diversion holes (3) are arranged at intervals from large to small, the diversion holes (3) which are closer to the drainage groove (4) are smaller, and the energy dissipation tail sill (2) is provided with a diversion gallery (7), and water flow enters the diversion hole (3) and is communicated with the drainage groove (4) through the diversion gallery (7); the drainage groove (4) is 1/10-1/15 of the total width of the stilling pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910823278.1A CN110541409B (en) | 2019-09-02 | 2019-09-02 | Novel stilling pool structure for automatically discharging sand and stone in guide pool by utilizing water flow effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910823278.1A CN110541409B (en) | 2019-09-02 | 2019-09-02 | Novel stilling pool structure for automatically discharging sand and stone in guide pool by utilizing water flow effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110541409A CN110541409A (en) | 2019-12-06 |
| CN110541409B true CN110541409B (en) | 2024-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910823278.1A Active CN110541409B (en) | 2019-09-02 | 2019-09-02 | Novel stilling pool structure for automatically discharging sand and stone in guide pool by utilizing water flow effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110541409B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759163A (en) * | 2017-03-02 | 2017-05-31 | 中国电建集团贵阳勘测设计研究院有限公司 | Stilling pool tail sill structure adopting bottom hole for sand discharge |
| CN206570778U (en) * | 2017-03-02 | 2017-10-20 | 中国电建集团贵阳勘测设计研究院有限公司 | Stilling pool tail sill structure adopting bottom hole for sand discharge |
| CN109778800A (en) * | 2019-02-01 | 2019-05-21 | 四川大学 | Bank type stilling pond is fallen in gradual change |
| CN210621643U (en) * | 2019-09-02 | 2020-05-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Utilize rivers effect to arrange by oneself and lead novel pond structure that disappears of grit in pond |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926544B (en) * | 2016-06-24 | 2018-02-02 | 中国电建集团华东勘测设计研究院有限公司 | A kind of economical mud-rock flow blocking dam structure and its construction method |
-
2019
- 2019-09-02 CN CN201910823278.1A patent/CN110541409B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759163A (en) * | 2017-03-02 | 2017-05-31 | 中国电建集团贵阳勘测设计研究院有限公司 | Stilling pool tail sill structure adopting bottom hole for sand discharge |
| CN206570778U (en) * | 2017-03-02 | 2017-10-20 | 中国电建集团贵阳勘测设计研究院有限公司 | Stilling pool tail sill structure adopting bottom hole for sand discharge |
| CN109778800A (en) * | 2019-02-01 | 2019-05-21 | 四川大学 | Bank type stilling pond is fallen in gradual change |
| CN210621643U (en) * | 2019-09-02 | 2020-05-26 | 中国电建集团贵阳勘测设计研究院有限公司 | Utilize rivers effect to arrange by oneself and lead novel pond structure that disappears of grit in pond |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110541409A (en) | 2019-12-06 |
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