CN207331645U - A kind of overfall dam chosen bank and novel transition step and combined - Google Patents
A kind of overfall dam chosen bank and novel transition step and combined Download PDFInfo
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- CN207331645U CN207331645U CN201721241661.9U CN201721241661U CN207331645U CN 207331645 U CN207331645 U CN 207331645U CN 201721241661 U CN201721241661 U CN 201721241661U CN 207331645 U CN207331645 U CN 207331645U
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- 230000007704 transition Effects 0.000 title claims abstract description 52
- 238000005273 aeration Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 10
- 230000006378 damage Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005276 aerator Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 230000002262 irrigation Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
A kind of overfall dam chosen bank and novel transition step and combined is the utility model is related to, belongs to hydraulic structure flood-discharge energy-dissipating field.Overfall dam utilizes the flaring gate pier after weir crest gate pier to form weir crest constricted jet, bank is chosen in the overflow bottom of jet stream after flaring gate pier again, is chosen from spillwag chute so that choose the ladder after bank formed large area without pool, so as to carry out aeration to the bottom of ladder, cavitation corrosion cavitation is avoided to destroy as far as possible；By flaring gate pier and choosing bank can not make the lower stream that sluices form two strands of water wings longitudinally to tower completely current flip shot, due to self gravitation and moisture mixing, there are part current to flow through the step after choosing bank, for more preferable energy dissipating and aeration, new transition steps are connected after bank is chosen, aeration and energy dissipating again is carried out to this part of current using the frictional resistance effect of step.Last current are flowing through ogee section+stiling basin, by the cooperative programs for being distributed energy dissipating.The utility model is a kind of united integrated energy dissipating pattern, and effect of energy dissipation protrudes.
Description
Technical field
A kind of overfall dam chosen bank and novel transition step and combined is the utility model is related to, belongs to hydraulic structure flood discharge and disappears
Can field.
Background technology
In recent years, with the development of grinding concrete dam technology, Stepped Spillway is at home and abroad in medium and small project
Get a lot of applications.And traditional Energy Dissipation Modes, energy dissipation rate height are limited only to 40m3(s.m) small discharge per unit width, big
In the case of discharge per unit width and high water head（Discharge per unit width q>40m3(s.m)）, due to the covering of overflow, cascaded surface ventilation
It is difficult, it is possible to create cavitation corrosion cavitation is destroyed, thus is impossible to be applied in the flood releasing structure of high water head, large discharge per unit.In order to
Increase the application range of stepped energy dissipater, flaring gate pier and step energy dissipater are combined by some scholars, make full use of wide tail
Vertical diffusion effect of the pier to current, increases by two lateral aerator of trajectory nappe and overflow enters water aeration, the overcurrent list for reducing step is wide
Flow, the effect of energy dissipation of ladder is weakened, so as to achieve the purpose that to increase discharge per unit width, improve head application range.But Zhang Ting
Find to stand in chopped-off head step in research to the integrated energy dissipater of Guizhou Suofengyin Hydropower Station X-type flaring gate pier+step+stiling basin
Face, there occurs cavitation phenomenon, illustrates that this integrated energy dissipater does not reach the air entrainment of overfull dam surface also with overfull dam surface junction
To requiring.
The content of the invention
Technical problem to be solved in the utility model, which is to provide, a kind of chooses bank and what novel transition step combined overflows
Dam is flowed, without any additional aeration equipment, the joint flood-discharge energy-dissipating structure of current itself aeration effect is fully relied on, can not only carry
High dam flood carrying capacity, but also can have the step surface after protection flaring gate pier and improve Step Energy Dissipation rate.
The technical solution adopted in the utility model is：A kind of overfall dam chosen bank and novel transition step and combined, including width
Tail pier 3, choose bank 4, novel transition ladder 5, uniform ladder 6, ogee section 7, the stiling basin 8 with baffle wall style 9, chooses 4 front end of bank company
Then 3 pier tail of flaring gate pier, by the current flip shot flowed out from 3 overflow surface bay 3-1 of flaring gate pier to downstream, allows flip shot current to mix in the air
Gas, collision, and then energy dissipating, terminate novel transition step 5,5 rear end of transition shoulder is sequentially connected uniform ladder 6, anti-arc after choosing bank 4
Section 7, the stiling basin 8 with baffle wall style 9, the novel transition step 5 include the big step of three identical sizes, three big platforms
Any one or any two or whole in rank are equipped with a small stair, in novel transition ladder 5 the salient angle vertex of big step and
The salient angle vertex of step connects into a reference line L in uniform ladder 6.
Big step high 2m, wide 1.5m, small stair high 1m, wide 1.125m in the novel transition step 5.
Using the big step facade vertex position of chopped-off head in novel transition ladder 5 as starting point, the point for increasing height h vertically upward is made
For level altitude point, weir face and the line of the tangent point of contact of stepped spillway and level altitude point are to choose bank 4, choose bank 4 and benchmark
Extended line shape upward straight line L chooses bank angle for θ at an angle.
The angle, θ is 9 °<θ<11.3°.
The height h is 0.3-1.5m.
The utility model chooses the dam structure that bank combines flood-discharge energy-dissipating using flaring gate pier and pier tail, including overflow dam 1,
Gate pier, flaring gate pier, choose bank.It is WES curved surfaces at the top of the dam body, by flaring gate pier 3 after current flow through WES curved surfaces, utilizes width
The pier face of tail pier 3 carries out aeration without pool to the bottom of the steps, substantially reduces the possibility for the destruction of cavitation corrosion cavitation occur.
The overfull dam surface, when sluicing stream flows through overfull dam surface instantly, due to rubbing action of the dam facing to current, consumption one
Part flow energy.One is set to choose bank 4 after the flaring gate pier 3, and this is chosen and is connected to novel transition ladder 5 under bank 4.It is described to choose bank 4,
Instantly sluicing flows through flaring gate pier 3 and goes out stream, and due to the effect of pre-aerator, bottom drain is more easy to by flip shot, forms stable choose
Away from and aerated cavity.The novel transition ladder 5, lower sluicing stream flows through choose bank 4 after, the shape on the stepped spillway after choosing bank 4
Into large area without pool, change the size and shape of aerated cavity area by varying 5 build of transition steps, make dam facing anhydrous
Area's aeration is more abundant, so as to reduce the destruction of cavitation corrosion cavitation；Step after cavity is precisely the front edge portion that lower sluicing tongue falls,
A large amount of gases that existing cavity aeration is brought into, and have the incomplete development hydraulic jump for falling overflow formation, it is internally formed by force in step
Strong gassiness rotary roll current, steam mixing is violent, and current produce strong turbulent fluctuation inside step, accelerates the energy consumption of aerial drainage
Dissipate, so as to improve the energy dissipation rate of step.
The course of work of the utility model：Overfall dam first opens the gate of gate pier 2 in flood discharge, and lower sluice is flowed from lock chamber
2-1 flows out, and forming cross-direction shrinkage, the overflow longitudinally to tower, then bank 4 of choosing after flaring gate pier by flaring gate pier 3 chooses from overflow
Face, forms without pool in overfull dam surface, with reference to novel transition step 5, changes the big of aerated cavity area using transition shoulder
Small and shape, produces stable aerated cavity, reduces cavitation corrosion cavitation and destroys, thus allow be subject to cavitation erosion overfull dam surface region by
To protection, the overflow bottom then provoked falls into the step 6 after cavity, and step is to its rotary roll, rubbing action, so as to form sliding
Current, to along playing water cushion, so as to accelerate lower sluicing stream energy dissipation, edge falls into ogee section 7 and the power that disappears after overflow after overflow
8 leading portion of pond, while forming hydraulic jump, also creates reflux, energy dissipating under the collective effect of the two；Further disappear by stiling basin
It can be acted on the hammed water of baffle wall style 9, energy dissipating again.
The beneficial effects of the utility model are：The entrance combined using gate pier with flaring gate pier is more than the lock chamber of outlet, can
Compressed capability using flaring gate pier increase to current, the lower stream cross-direction shrinkage that sluices vertically is stretched, flip shot to downstream, into choosing for stock
Mutual aeration, the collision in the air of jetting tongue, so as to improve the effect of energy dissipation of flaring gate pier, and sets after flaring gate pier and chooses bank, can will be from
The water body that lock chamber goes out stream is chosen from spillwag chute, so that spillwag chute afterwards is formed without pool, utilizes the build of novel transition ladder
To change the size and shape of aerated cavity area, so allow be easiest to by cavitation corrosion cavitation destroy the reasonable aeration of overfull dam surface,
Reducing destruction may.Step after cavity is precisely that overflow forward position is fallen a little, and the frictional resistance of current is acted on using step, accelerates platform
Rank is to aerial drainage dissipation of energy；Ogee section and the further energy dissipating of stiling basin are utilized afterwards, and the utility model utilizes branch's subregion
Joint flood-discharge energy-dissipating structure, had not only reduced the destruction of overfull dam surface cavitation corrosion cavitation, but also improved energy dissipation rate.
Brief description of the drawings
Fig. 1 is the front view of the utility model；
Fig. 2 is the enlarged drawing of encircled portion in Fig. 1；
Fig. 3 is the top view of the utility model；
Fig. 4 is that the utility model chooses a kind of structure chart that bank 4, novel transition ladder 5, uniform ladder 6 connect；
Fig. 5,6,7 are respectively to choose bank 4, the connection structure diagram of novel transition ladder 5 when θ is different angle in Fig. 4；
Fig. 8 is that the utility model the utility model chooses another knot that bank 4, novel transition ladder 5, uniform ladder 6 connect
Composition；
Fig. 9,10,11 are respectively to choose bank 4, the connection structure diagram of novel transition ladder 5 when θ is different angle in Fig. 8；
Figure 12 is that the utility model the utility model chooses the third kind that bank 4, novel transition ladder 5, uniform ladder 6 connect
Structure chart；
Figure 13,14,15 are respectively to choose bank 4, the connection structure diagram of novel transition ladder 5 when θ is different angle in Figure 12.
In figure respectively marked as：Bank -4 are chosen in overflow dam -1, gate pier -2, flaring gate pier -3, novel transition ladder -5, uniformly
Ladder -6, ogee section -7, stiling basin -8, baffle wall style 9, lock chamber -2-1, overflow surface bay -3-1.
Embodiment
With reference to the accompanying drawings and detailed description, it is further described for the utility model.
Embodiment 1：A kind of overfall dam chosen bank and novel transition step and combined, including flaring gate pier 3, choose bank 4, novel transition
Ladder 5, uniform ladder 6, ogee section 7, the stiling basin 8 with baffle wall style 9, choose 4 front end of bank and are connected to 3 pier tail of flaring gate pier, will be from
Downstream is arrived in the current flip shot of 3 overflow surface bay 3-1 of flaring gate pier outflows, allow flip shot current in the air aeration, collide, and then energy dissipating is chosen
Novel transition step 5 is terminated after bank 4,5 rear end of transition shoulder is sequentially connected uniform ladder 6, ogee section 7, disappearing with baffle wall style 9
Power pond 8, the novel transition step 5 include the big step of three identical sizes, any one in three big step or wantonly two
A or whole is equipped with a small stair, in novel transition ladder 5 in the salient angle vertex of big step and uniform ladder 6 step it is convex
Angular vertex connects into a reference line L.
Further, the big step high 2m in the novel transition step 5, wide 1.5m, small stair high 1m are wide
1.125m, as shown in FIG. 4,5,6, 7, the present embodiment include three big steps, are equipped with the big step of the lowermost one small
Step.
Further, using the big step facade vertex position of chopped-off head in novel transition ladder 5 as starting point, increase is high vertically upward
The point of h is spent as level altitude point, and weir face and the line of the tangent point of contact of stepped spillway and level altitude point are to choose bank 4, are chosen
Bank 4 chooses bank angle for θ at an angle with extended line shape upward reference line L.
Further, the angle, θ is 9 °<θ<11.3 °, as shown in Fig. 5,6,7, angle, θ is respectively 9 °, 10 °, 11 °.
Further, the height h is 0.3-1.5m, and h is 1m in the present embodiment.
The present embodiment is applied in the water conservancy project flood releasing structure of high water head, large discharge per unit, such as：It is simultaneous based on power generation
Care for the water conservancy and hydropower multi-purpose project of the comprehensive utilizations such as flood control, irrigation.The power station normal pool level 1504m, installed capacity 2000MW,
Power station normal pool level corresponds to 8.06 hundred million m of storage capacity3, adjust 2.38 hundred million m of storage capacity3, storage coefficient 0.0047, has day regulating power,
Water catching area 235381km2.Power station spillway maximum functional head 105m, the uniform ladder gradient is designed as 53 °, it is maximum
Discharge per unit width 178m3/s.m。
Experimental test shows that the combined energy dissipater for choosing bank+novel transition step in the present embodiment can protect WES curved sections
With chopped-off head step facade joining place, avoid that the destruction of cavitation corrosion cavitation occurs, energy dissipation rate is about 60%.
Embodiment 2, the present embodiment is similar with the structure of embodiment 1, and difference is：As shown in Fig. 8,9,10,11, this
Embodiment includes three big steps, and a small stair is respectively equipped with bottom and middle big step.
The present embodiment is applied equally in the water conservancy project flood releasing structure of high water head, large discharge per unit, such as：It is with power generation
It is main, take into account the water conservancy and hydropower multi-purpose project of the comprehensive utilizations such as flood control, irrigation.
Experimental test shows that the combined energy dissipater for choosing bank+novel transition step in the present embodiment can protect WES curved sections
With chopped-off head step facade joining place, avoid that the destruction of cavitation corrosion cavitation occurs, energy dissipation rate is about 60%.
Embodiment 3：The present embodiment is similar with the structure of embodiment 1, and difference is：Such as figure:12nd, 13,14,15 institute
Show, the present embodiment includes three big steps, and a small stair is respectively equipped with three big steps.
It is 53 ° that the present embodiment, which is used for the uniform ladder gradient of step, applied to low water head, the flood releasing structure of small discharge per unit width
In.The structure that transition shoulder is alternately arranged using pace with narrow step, under low water head, small discharge per unit width, by being let out under lock chamber
Current by choosing bank, a stable aerated cavity can be formed, cavitation corrosion cavitation is reduced and destroy；It is main on step after cavity
Stream rotary roll area is internally formed horizontal rotary roll current in step, its mutually shearing and momentum-exchange aggravation between dam facing mainstream, from
And improve energy dissipation rate.
The scope proposed in the utility model chooses bank angle, θ（9°<θ<11.3°）With in 3 high 2m, the big platform of wide 1.5m
On rank plus any different sizes for meeting engine request, the combination of small stair of different numbers still fall within the protection of the utility model
In the range of.
Overfall dam novel transition ladder 5 is followed by uniform ladder 6, and uniform ladder 6 is followed by ogee section 7 and with baffle wall style 9
Stiling basin 8.Overfall dam utilizes the flaring gate pier 3 after weir crest gate pier to form weir crest constricted jet, and the overflow bottom of jet stream is again through wide
Choose bank 4 after tail pier 3, chosen from spillwag chute so that choose the ladder after bank 4 formed large area without pool so as to rank
The bottom of ladder carries out aeration, avoids cavitation corrosion cavitation to destroy as far as possible；By flaring gate pier 3 and choose under bank 4 can not make current flip shot
The stream that sluices forms two strands of water wings longitudinally to tower completely, due to self gravitation and moisture mixing, has part current to flow through and chooses
Step after bank, for more preferable energy dissipating and aeration, a new transition steps 5 is connected after bank 4 is chosen, utilize rubbing for step
Resistance effect carries out aeration and energy dissipating again to this part of current.Last current are flowing through ogee section 7+ stiling basins 8, pass through distribution
The cooperative programs of energy dissipating.The utility model is a kind of united integrated energy dissipating pattern, and effect of energy dissipation protrudes.
Specific embodiment of the present utility model is explained in detail above in association with attached drawing, but the utility model is not
It is limited to the above embodiment, within the knowledge of a person skilled in the art, this practicality can also be not being departed from
Various changes can be made on the premise of new objective.
Claims (5)
- A kind of 1. overfall dam chosen bank and novel transition step and combined, it is characterised in that：Including flaring gate pier（3）, choose bank（4）, it is new Type transition steps（5）, uniform ladder（6）, ogee section（7）, with baffle wall style（9）Stiling basin（8）, choose bank（4）Front end connects Flaring gate pier（3）Pier tail, will be from flaring gate pier（3）Overflow surface bay（3-1）The current flip shot of outflow allows flip shot current in sky to downstream Middle aeration, collision, and then energy dissipating, choose bank（4）Novel transition ladder is terminated afterwards（5）, transition steps（5）Rear end is sequentially connected uniformly Ladder（6）, ogee section（7）, with baffle wall style（9）Stiling basin（8）, the novel transition ladder（5）It is identical including three The big step of size, any one or any two or whole in three big step are equipped with a small stair, novel transition ladder （5）In big step salient angle vertex and uniform ladder（6）The salient angle vertex of middle step connects into a reference line L.
- A kind of 2. overfall dam chosen bank and novel transition step and combined according to claim 1, it is characterised in that：Described Novel transition ladder（5）In big step high 2m, wide 1.5m, small stair high 1m, wide 1.125m.
- A kind of 3. overfall dam chosen bank and novel transition step and combined according to claim 1 or 2, it is characterised in that：With Novel transition ladder（5）The middle big step facade vertex position of chopped-off head is starting point, increases the point of height h vertically upward as fixed high Point is spent, weir face and the line of the tangent point of contact of stepped spillway and level altitude point are to choose bank（4）, choose bank（4）With reference line L Upward extended line shape chooses bank angle for θ at an angle.
- A kind of 4. overfall dam chosen bank and novel transition step and combined according to claim 3, it is characterised in that：Described Angle, θ is 9 °<θ<11.3°.
- A kind of 5. overfall dam chosen bank and novel transition step and combined according to claim 3, it is characterised in that：Described Height h is 0.3-1.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721241661.9U CN207331645U (en) | 2017-09-26 | 2017-09-26 | A kind of overfall dam chosen bank and novel transition step and combined |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721241661.9U CN207331645U (en) | 2017-09-26 | 2017-09-26 | A kind of overfall dam chosen bank and novel transition step and combined |
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| Publication Number | Publication Date |
|---|---|
| CN207331645U true CN207331645U (en) | 2018-05-08 |
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|---|---|---|---|
| CN201721241661.9U Expired - Fee Related CN207331645U (en) | 2017-09-26 | 2017-09-26 | A kind of overfall dam chosen bank and novel transition step and combined |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700439A (en) * | 2017-09-26 | 2018-02-16 | 昆明理工大学 | A kind of overfall dam chosen bank and novel transition step and combined |
| CN109056668A (en) * | 2018-07-25 | 2018-12-21 | 昆明理工大学 | A kind of anti-cavitation facility of Stepped Spillway flaring gate pier tail portion |
-
2017
- 2017-09-26 CN CN201721241661.9U patent/CN207331645U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107700439A (en) * | 2017-09-26 | 2018-02-16 | 昆明理工大学 | A kind of overfall dam chosen bank and novel transition step and combined |
| CN109056668A (en) * | 2018-07-25 | 2018-12-21 | 昆明理工大学 | A kind of anti-cavitation facility of Stepped Spillway flaring gate pier tail portion |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180508 Termination date: 20180926 |
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| CF01 | Termination of patent right due to non-payment of annual fee |