CN205077460U - A class bank is chosen to differential type - Google Patents
A class bank is chosen to differential type Download PDFInfo
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- CN205077460U CN205077460U CN201520696714.0U CN201520696714U CN205077460U CN 205077460 U CN205077460 U CN 205077460U CN 201520696714 U CN201520696714 U CN 201520696714U CN 205077460 U CN205077460 U CN 205077460U
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- bank
- stream
- chooses
- differential type
- circular arc
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Abstract
The utility model discloses a class bank is chosen to differential type for reduce the water flow scouring in dam body low reaches, it is including setting up a class bank is chosen to the arc in dam body low reaches, and sets up on class bank is chosen to the arc, be used for choosing a class tooth to a plurality of circular arc camber of the dam body left and right sides and vertical diffusion respectively with the rivers in dam body low reaches. Implement the technical scheme of the utility model, partly rivers that a plurality of circular arc camber chose in the feasible rivers of flowing through of class tooth collide mutually with the both sides rivers, have improved the efficiency rate of dam body. This a plurality of circular arc camber chooses class tooth still makes another the part rivers in the rivers flow through take place vertical diffusion in the same direction as water flow direction, has increased energy dissipation, has reduced the overflow unit area energy that entries, alleviates the local scour to the damsite low reaches.
Description
Technical field
The utility model relates to Hydraulic and Hydro-Power Engineering field, and especially a kind of differential type chooses stream bank.
Background technology
In Hydraulic and Hydro-Power Engineering gravity dam is built, the normal operation of Overflow Section of Gravity Dam energy dissipater and the dissipation and scouring in downstream are the major issues concerning dam safety.It is that one of bank build is flowed in common the choosing of Ba Gongzhong that differential type chooses stream bank, and the tooth of differential bank can make rectangle, trapezoidal or cosine-shaped.Current jet disperses up and down to when choosing stream bank, aloft after sufficient diffusion, can alleviate the local scour in downstream.The advantage that existing differential type chooses stream bank is that energy dissipating efficiency is high, effect of energy dissipation is good, but under high-velocity flow, easily there is strong cavitation phenomenon, the crest line of tooth and side are vulnerable to the cavitation erosion of high speed flow-disturbing, choose stream bank as the differential type in three-bristle cudrania small stream engineering and there occurs serious cavitation erosion problem, and there are no appropriate measures.
Utility model content
The technical problems to be solved in the utility model is, provides a kind of differential type of improvement to choose stream bank.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of differential type and choose stream bank, for reducing the current scour in dam body downstream, it comprises the arc being arranged on described dam body downstream and chooses stream bank, and is arranged on described arc and chooses on stream bank, for the current in dam body downstream are chosen stream tooth respectively to several circular arc cambers of the dam body left and right sides and vertical diffusion.
Differential type of the present utility model is chosen in stream bank, and several circular arc cambers described choose stream tooth chooses stream bank width equidistant arrangement along described arc.
Differential type of the present utility model is chosen in stream bank, and the upstream face upgrade that each described circular arc camber chooses stream tooth is continuous print.
Differential type of the present utility model choose stream bank in, each described circular arc camber choose stream tooth choose angle be greater than described arc choose stream bank choose angle.
Differential type of the present utility model is chosen in stream bank, and each described circular arc camber chooses stream tooth and described arc, and to choose the angular difference of choosing flowed between bank be 5 ° ~ 10 °.
Differential type of the present utility model is chosen in stream bank, and the angle of choosing that each described circular arc camber chooses stream tooth is 20 ° ~ 30 °.
Differential type of the present utility model is chosen in stream bank, and the base length that described arc chooses stream bank accounts for 1/6 ~ 1/3 of described dam body downstream total length.
Differential type of the present utility model is chosen in stream bank, and the shape parameter that described arc chooses stream bank is determined by physical experiments.
Differential type of the present utility model is chosen in stream bank, and the shape parameter that each described circular arc camber chooses stream tooth is determined by physical experiments.
Implement the technical solution of the utility model, at least there is following beneficial effect: this differential type is chosen stream bank and chosen on stream bank at arc and arrange several circular arc cambers and choose stream tooth, several circular arc cambers are chosen stream tooth and a part of current in the current flowed through and both sides current are collided mutually, improve the dumping ratio of dam body.These several circular arc cambers are chosen stream tooth and are also made another part current Parallel to the flow direction in the current flowed through that vertical diffusion occurs, and add energy dissipation, reduce overflow and enter water energy per unit area, alleviate the local scour to dam site downstream.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation that the differential type in an embodiment of the present utility model chooses stream bank;
Wherein, 1, arc chooses stream bank; 2, circular arc camber chooses stream tooth.
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe detailed description of the invention of the present utility model in detail.
A kind of differential type that Fig. 1 shows in the utility model chooses stream bank, and this differential type chooses the current scour that stream bank can reduce dam body downstream.This differential type is chosen stream bank and is applicable to common various Hydraulic and Hydro-Power Engineering gravity dams, is particularly useful for the construction of Overflow Section energy dissipater and the dissipation and scouring in downstream.
Fig. 1 is the structural representation that the differential type in an embodiment of the present utility model chooses stream bank.As shown in Figure 1, this differential type is chosen stream bank and is comprised the arc being arranged on dam body downstream and choose stream bank 1 and be arranged on this arc several circular arc cambers chosen on stream bank 1 and choose stream tooth 2.Several circular arc cambers choose stream tooth 2 can by the current in dam body downstream respectively to the dam body left and right sides and vertically spread.Consult Fig. 1, this circular arc camber each choose stream tooth 2 choose angle be greater than this arc choose stream bank 1 choose angle.Generally, this circular arc camber each is chosen stream tooth 2 and this arc to choose the angular difference of choosing flowed between bank 1 is 5 ° ~ 10 °.
It is on the basis that common arc chooses stream bank 1 that this differential type chooses stream bank, adds several circular arc cambers and chooses stream tooth 2.Certainly, generally, these several circular arc cambers choose stream tooth 2 chooses stream bank 1 width equidistant arrangement along this arc.But do not get rid of the arrangement mode that several circular arc cambers choose stream tooth 2 and have change to a certain degree; still can by the middle part current in dam body downstream respectively to the dam body left and right sides and vertically spread, then several circular arc cambers of arrangement like this choose stream tooth 2 also in protection domain of the present utility model.
The energy dissipating principle that this differential type chooses stream bank is as follows: the current of overfull dam surface flow through several circular arc cambers choosing the width equidistant arrangement of stream bank 1 along this arc when choosing stream tooth 2, flow through several circular arc cambers choose stream tooth 2 current spread respectively to the left and right sides, a part of current through diffusion after collide with both sides groove face overflow, collaborate and leave to downstream.Another part current are chosen after stream tooth 2 sideways diffusion through several circular arc cambers, to Parallel to the flow direction, vertical diffusion occur aloft, drop into downstream after current vertically spread.And dam facing both sides current and middle part current can send collision, and interflow drops to downstream.Therefore, flow through a part of current and the both sides current that several circular arc cambers choose stream tooth 2 and collide, another part current Parallel to the flow direction occurs vertically to spread simultaneously, alleviates downstream local scour, reduces the requirement of strength to dam site downstream basement rock.
To sum up, this differential type choose stream bank arc choose stream bank 1 on arrange several circular arc cambers choose stream tooth 2, several circular arc cambers choose stream tooth 2 a part of current in the current flowed through and both sides current are collided mutually, improve the dumping ratio of dam body.These several circular arc cambers are chosen stream tooth 2 and are also made another part current Parallel to the flow direction in the current flowed through that vertical diffusion occurs, and add energy dissipation, reduce overflow and enter water energy per unit area, alleviate the local scour to dam site downstream.
It should be noted that, the energy dissipating principle of stream bank is chosen according to above-mentioned differential type, arc is chosen stream bank 1 and several circular arc cambers and is chosen stream tooth 2 and all carried out good Dam Configuration Design, generally, the shape parameter that this arc chooses stream bank 1 is determined by physical experiments, and the shape parameter that this circular arc camber chooses stream pier is determined by physical experiments.
In addition, in certain embodiments, this circular arc camber each is chosen the upstream face upgrade flowing tooth 2 and be can be continuous print.The angle of choosing that this circular arc camber each chooses stream tooth 2 can be 20 ° ~ 30 °.The base length that this arc chooses stream bank 1 can account for 1/6 ~ 1/3 of this dam body downstream total length.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various change, combination and change.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present utility model.
Claims (9)
1. a differential type chooses stream bank, for reducing the current scour in dam body downstream, it is characterized in that, comprise the arc being arranged on described dam body downstream and choose stream bank (1), and be arranged on described arc choose stream bank (1) upper, for the current in dam body downstream are chosen stream tooth (2) respectively to several circular arc cambers of the dam body left and right sides and vertical diffusion.
2. differential type according to claim 1 chooses stream bank, it is characterized in that, several circular arc cambers described choose stream tooth (2) chooses stream bank (1) width equidistant arrangement along described arc.
3. differential type according to claim 1 chooses stream bank, it is characterized in that, the upstream face upgrade that each described circular arc camber chooses stream tooth (2) is continuous print.
4. differential type according to claim 1 chooses stream bank, it is characterized in that, each described circular arc camber choose stream tooth (2) choose angle be greater than described arc choose stream bank (1) choose angle.
5. differential type according to claim 4 chooses stream bank, it is characterized in that, each described circular arc camber chooses stream tooth (2) and described arc, and to choose the angular difference of choosing flowed between bank (1) be 5 ° ~ 10 °.
6. differential type according to claim 4 chooses stream bank, it is characterized in that, the angle of choosing that each described circular arc camber chooses stream tooth (2) is 20 ° ~ 30 °.
7. differential type according to claim 1 chooses stream bank, it is characterized in that, the base length that described arc chooses stream bank (1) accounts for 1/6 ~ 1/3 of described dam body downstream total length.
8. the differential type according to any one of claim 1 to 7 chooses stream bank, it is characterized in that, the shape parameter that described arc chooses stream bank (1) is determined by physical experiments.
9. the differential type according to any one of claim 1 to 7 chooses stream bank, it is characterized in that, the shape parameter that each described circular arc camber chooses stream tooth (2) is determined by physical experiments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520696714.0U CN205077460U (en) | 2015-09-09 | 2015-09-09 | A class bank is chosen to differential type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520696714.0U CN205077460U (en) | 2015-09-09 | 2015-09-09 | A class bank is chosen to differential type |
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| Publication Number | Publication Date |
|---|---|
| CN205077460U true CN205077460U (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520696714.0U Expired - Fee Related CN205077460U (en) | 2015-09-09 | 2015-09-09 | A class bank is chosen to differential type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120675A (en) * | 2016-08-08 | 2016-11-16 | 浙江水利水电学院 | A kind of efficiently energy dissipating flood discharge overfull dam surface structure |
| CN108360473A (en) * | 2018-02-09 | 2018-08-03 | 杨凌职业技术学院 | The construction method of bank is chosen in a kind of three-dimensional scatter energy dissipating |
-
2015
- 2015-09-09 CN CN201520696714.0U patent/CN205077460U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106120675A (en) * | 2016-08-08 | 2016-11-16 | 浙江水利水电学院 | A kind of efficiently energy dissipating flood discharge overfull dam surface structure |
| CN106120675B (en) * | 2016-08-08 | 2018-07-06 | 浙江水利水电学院 | A kind of efficient energy dissipating flood discharge overfull dam surface structure |
| CN108360473A (en) * | 2018-02-09 | 2018-08-03 | 杨凌职业技术学院 | The construction method of bank is chosen in a kind of three-dimensional scatter energy dissipating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160309 Termination date: 20160909 |
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| CF01 | Termination of patent right due to non-payment of annual fee |