CN204097976U - A kind of absorption basin - Google Patents
A kind of absorption basin Download PDFInfo
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- CN204097976U CN204097976U CN201420514888.6U CN201420514888U CN204097976U CN 204097976 U CN204097976 U CN 204097976U CN 201420514888 U CN201420514888 U CN 201420514888U CN 204097976 U CN204097976 U CN 204097976U
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Abstract
The utility model discloses a kind of absorption basin, aim to provide a kind of effect of energy dissipation good, the absorption basin that construction costs is low.It comprises tail bank, and the middle part of described tail bank arranges breach, makes tail bank form concave shape; The length of described breach is 1/2 ~ 2/3 of tail bank length, and the height of described indentations bottom is 0 ~ 1/2 of tail bank height.The dispersion of the utility model to flow has comparatively significant effect, and can adapt to the change of flow in a big way, can save engineering quantity, be a kind of novel energy dissipater's build.
Description
Technical field
The utility model relates to Hydraulic and Hydro-Power Engineering technical field, especially relates to a kind of New Type Energy Dissipator build absorption basin of discharge construction.
Background technology
Absorption basin is the energy-dissipating installation of stream in downstream generation underflow type hydraulic jump that sluice under impelling outlet structure escape works.By hydraulic jump, the torrent released by outlet structure escape works changes unhurried current into, to eliminate the Energy Dissipation Modes of kinetic energy.Generally the kinetic energy of the lower stream that sluices can be eliminated 40% ~ 70%, and can shorten protection-apron length, be a kind of effectively energy-dissipating installation of economy.It has fluid stable, and effect of energy dissipation is better, to geological conditions and tail water luffing strong adaptability, and the advantages such as tail water fluctuation is little.But there is earthwork evacuation amount in the construction of existing absorption basin and concrete square amount is comparatively large, the deficiency that construction costs is higher.In addition, upper pond level is large to the drop of the first section that jumps, therefore this place's flow velocity is high, and when Froude number Fr is lower, the kinetic energy of dissipation is few, and complementary energy is many, and complementary energy is exactly mainly the potential energy that water depth after jump is expressed.Therefore, how the energy dissipating load transfer plan in absorption basin is reduced washing away left and right bank slope to downstream river course, to the problem solving water depth after jump that complementary energy brings larger, there is important theory value and and engineering significance while reduce native stone excavated volume, reduce construction costs.
Utility model content
The utility model overcomes shortcoming of the prior art, provides a kind of effect of energy dissipation good, the absorption basin that construction costs is low.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: a kind of absorption basin, comprises tail bank, and the middle part of described tail bank arranges breach, makes tail bank form concave shape; The length of described breach is 1/2 ~ 2/3 of tail bank length, and the height of described indentations bottom is 0 ~ 1/2 of tail bank height.
Preferably, the length of described breach is 1/2 of tail bank length, and the height of described indentations bottom is 0 ~ 1/3 of tail bank height.
Preferably, described breach is positioned at side to the right in the middle part of tail bank.
Preferably, the cross section of described indentation, there is trapezoidal.
Preferably, the wall thickness of described indentation, there is less than the wall thickness of tail bank.
Compared with prior art, the utility model tool has the following advantages:
The utility model absorption basin only arranges the absorption basin tail bank of suitably height in absorption basin afterbody arranged on left and right sides, the mid portion at absorption basin afterbody main flow place does not establish tail bank, only arranges the little bank of suitably height.Its hydraulics feature is: make the best use of the situation to going out pond current; main flow is allowed directly to go out pond; main flow is washed away in the middle part of underwater bed; what formed rushes the length that hole adds absorption basin virtually; make down to let out water energy to disappear in absorption basin and downstream river course punching hole and stop; current are chosen to surface by the tail bank of the left and right sides simultaneously, make two sides side slope obtain good protection like this.The main flow that the little bank of the mid portion setting at absorption basin afterbody main flow place makes this position go out bottom the current of pond is provoked, and reduces and determines washing away of position, boundary to dynamic, enhance the stability after absorption basin tail bank, saved construction investment.
The present invention has following beneficial effect:
1, versatility is stronger, is substantially applicable to all power stations being provided with absorption basin type that the level of tail water is high.
2, reduce concrete engineering quantity, saved construction investment, make two sides, left and right bank slope obtain good protection.
3, make the best use of the situation to going out pond current, allow main flow directly go out pond, main flow carries out lumped scour in the middle part of underwater bed, formation rush the length that hole adds absorption basin virtually, make down to let out water energy at absorption basin and punching hole, downstream inner dissipation.
4, give underwater bed by the energy dissipating load sharing originally wanting absorption basin to bear, make absorption basin, the safety of dam obtains further guarantee.By contrast, be middle bank absorption basin, fall the energy dissipater such as ridge underflow stilling basin or flaring gate pier build and all do not reach this effect of energy dissipation.
5, the main flow that the little bank that the mid portion at absorption basin afterbody main flow place arranges breach formation makes this position go out bottom the main flow of pond is provoked, and reduces and determines washing away of position, boundary to dynamic, strengthens the stability after absorption basin tail bank.
6, the dispersion of absorption basin to flow that tail bank offers breach has comparatively significant effect, and can adapt to the change of flow in a big way, can save engineering quantity, be a kind of novel energy dissipater's build.Itself and flaring gate pier have different energy dissipatings to conceive, and the latter improves the dose rate that disappears in absorption basin, and the former is transfer and dispersion absorption basin energy dissipating load, and it is to reducing costs tool significance.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is top view of the present utility model.
Fig. 2 is stereogram of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not paying the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Absorption basin shown in Fig. 1 and Fig. 2, comprises tail bank 1, and the middle part of described tail bank 1 arranges breach 2, makes tail bank 1 form concave shape; The length of described breach 2 is 1/2 ~ 2/3 of tail bank 1 length, and the height bottom described breach 2 is 0 ~ 1/2 of tail bank 1 height, and as preferably, the length of described breach 2 is 1/2 of tail bank 1 length, and the height bottom described breach 2 is 1/3 of tail bank 1 height.
Wherein, described breach 2 is preferably positioned at side to the right in the middle part of tail bank, so that the main flow used bottom pond protects slope, left bank while provoking.The cross section at described breach 2 place is trapezoidal, and the wall thickness at described breach 2 place is less than the wall thickness of tail bank 1.
Absorption basin on certain test power station arranges the tail bank of this structure: this power station force reduction pool bottom is 61m to the dam crest discrepancy in elevation, the dark 8m of absorption basin, the long 80m in pond, and force reduction pool bottom and outlet protection-apron elevation are 292m.Arrange the absorption basin tail bank of high 8m on the left and right both sides of absorption basin afterbody, the mid portion at absorption basin afterbody main flow place forms breach, notch length b=36.5m, indentations bottom height 2m.
Model testing shows that gap type absorption basin tail bank substantially reduces absorption basin load, and water depth after jump (punching hole) obviously reduces, dynamic determine position, boundary wash away obvious reduction, produce a desired effect.Originally the energy dissipating load sharing wanting absorption basin to bear is given underwater bed by the utility model, makes absorption basin, the safety of dam obtains further guarantee.It can effectively reduce concrete engineering quantity, saves construction investment, makes two sides, left and right bank slope obtain good protection.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. an absorption basin, comprises tail bank (1), it is characterized in that: the middle part of described tail bank (1) arranges breach (2), makes tail bank (1) form concave shape; The length of described breach (2) is 1/2 ~ 2/3 of tail bank (1) length, and the height of described breach (2) bottom is 0 ~ 1/2 of tail bank (1) height.
2. absorption basin according to claim 1, is characterized in that: the length of described breach (2) is 1/2 of tail bank (1) length, and the height of described breach (2) bottom is 0 ~ 1/3 of tail bank (1) height.
3. absorption basin according to claim 1, is characterized in that: described breach (2) is positioned at side to the right in the middle part of tail bank.
4. absorption basin according to claim 1, is characterized in that: the cross section at described breach (2) place is trapezoidal.
5. absorption basin according to claim 1, is characterized in that: the wall thickness at described breach (2) place is less than the wall thickness of tail bank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420514888.6U CN204097976U (en) | 2014-09-10 | 2014-09-10 | A kind of absorption basin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420514888.6U CN204097976U (en) | 2014-09-10 | 2014-09-10 | A kind of absorption basin |
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| Publication Number | Publication Date |
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| CN204097976U true CN204097976U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420514888.6U Active CN204097976U (en) | 2014-09-10 | 2014-09-10 | A kind of absorption basin |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179158A (en) * | 2014-09-10 | 2014-12-03 | 中国电建集团昆明勘测设计研究院有限公司 | Stilling pool |
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2014
- 2014-09-10 CN CN201420514888.6U patent/CN204097976U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179158A (en) * | 2014-09-10 | 2014-12-03 | 中国电建集团昆明勘测设计研究院有限公司 | Stilling pool |
| CN104179158B (en) * | 2014-09-10 | 2016-08-24 | 中国电建集团昆明勘测设计研究院有限公司 | A kind of stiling basin |
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| GR01 | Patent grant |