CN200946261Y - Differential type flip bucket for mixing air - Google Patents
Differential type flip bucket for mixing air Download PDFInfo
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- CN200946261Y CN200946261Y CN 200620073701 CN200620073701U CN200946261Y CN 200946261 Y CN200946261 Y CN 200946261Y CN 200620073701 CN200620073701 CN 200620073701 CN 200620073701 U CN200620073701 U CN 200620073701U CN 200946261 Y CN200946261 Y CN 200946261Y
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- bank
- choose
- short time
- choosing
- aeration
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Abstract
The utility model relates to a differential-type aerating flip bucket, which comprises a flip bucket body. A small flip bucket is arranged on the upper part of the flip bucket body. The small flip bucket and the flip bucket body have the same sloping point. The formed flowing surface alternates with concave and convex strips, which forces water flow bottom to spray at different angles after leaving the flip bucket end. The strengthened bottom eddy motion entrains more air to increase air concentration of the water flow bottom. The validity of the utility model has been tried and proved. The simple structure can effectively increase air concentration and prevent outlet structure from air eroding damage, so the utility model has good application prospect.
Description
Technical field
The utility model relates to a kind of aeration of outlet structure escape works that is mainly used in the hydraulic engineering and chooses bank, is in particular a kind of differential type aeration and chooses bank.
Technical background
In high dam was built, the investment of outlet structure escape works accounted for the 40-60% of whole engineering.When head meets or exceeds 100m, its flow velocity will meet or exceed 35m/s, and the knowledge question of water conservancy that brings thus all belongs to the high-velocity flow problem, and the safe operation of engineering is brought serious threat.Wherein, the most outstanding with the cavitation and cavitation erosion problem especially, it directly influences the safe operation of building.
Numerous tests and engineering practice are verified, by can preventing and alleviate the generation of cavitation and cavitation erosion phenomenon effectively to the current aeration, thereby protect water boundaries to exempt from the destruction of cavitation corrosion.And to make the current aeration, it is again the easiest measure of a kind of economy the most that aerator (groove) is set on the current border.So cross water buildings, particularly be widely used on the high speed outlet structure escape works in water conservancy project at present.Adopt at present aeration to choose bank, aeration groove in the engineering, fall the air entraining facilities of bank and combination form thereof, wherein aeration is chosen bank and is contained aeration and chooses the combination form of bank and be most widely used.As Fig. 1-shown in Figure 2, acquire a certain degree at current (A) flow velocity, produce cavity in the aerator downstream, air-flow (B) enters cavity from the air vent of abutment wall both sides, because the turbulent fluctuation of cavity overflow is mixed in the current.
Usually in order to increase the air entrainment of choosing bank, prolong protection length, the general employing increases the measure of penetrating distance, also promptly increases the cavity length of jet, needs to increase the high or local bank downstream base slope that strengthens of bank thus.Test confirms: under big discharge per unit width condition, too much increase bank is high and strengthen base slope under the bank, will aggravate water level fluctuation, worsens the downstream flow-shape, to long free flow tunnel, the surplus width of cloth of barrel safety is reduced and need increase barrel, the increase engineering quantity.
Summary of the invention
The purpose of this utility model is exactly to propose a kind of differential type aeration for the above-mentioned defective that solves prior art to choose bank; it can effectively strengthen the turbulent fluctuation blending effect of trajectory nappe lower edge; improve the air entrainment of choosing bank; prolong the protection length of aerator, also can and fall bank simultaneously and be used in combination with the aeration groove.
The purpose of this utility model realizes by following technical solution:
A kind of slotted flip bucket, it includes chooses the bank body, and the wherein said part of choosing on the bank body is provided with and chooses bank for a short time, chooses the bank and the original bank body of choosing for a short time and plays the slope point at same position, and chooses the bank body and constitutes the differential flow-passing surface of concavo-convex alternate current.
The purpose of this utility model also can further realize by following technology solution:
Aforesaid a kind of slotted flip bucket, the wherein said height Parallel to the flow direction of choosing bank for a short time increases progressively gradually.
Aforesaid a kind of slotted flip bucket, the wherein said differential bank height of choosing for a short time raises gradually to identical with water (flow) direction to terminal direction to choose the bank starting point for a short time, and the outer contour of choosing bank and the terminal section of choosing bank body formation for a short time is a concavo-convex alternate broken line.
Aforesaid a kind of slotted flip bucket, the wherein said bank of choosing is for a short time chosen bank for the dovetail shaped of projection, and it is preface with the Parallel to the flow direction, and is front wide and rear narrow.
Aforesaid a kind of slotted flip bucket, the wherein said bank of choosing is for a short time chosen bank for the dovetail shaped of projection, and it is preface with the Parallel to the flow direction, and is beloid.
Aforesaid a kind of slotted flip bucket, the wherein said bank of choosing is for a short time chosen bank for the strip of projection, and it is preface with the Parallel to the flow direction, and front and back are wide.
The utility model has the advantages that: the end that tradition is chosen bank is highly identical, and the promptly whole bank of choosing is identical with the angle of outlet structure escape works flow-passing surface.The utility model local again increase on the basis of traditional aerator is chosen bank for a short time and is formed differential, the differential end of choosing bank is highly different, according to end highly difference be called low bank and Gao Kan respectively, be respectively α 1 and α 2 with the angle of outlet structure escape works flow-passing surface, wherein 0＜α, 1＜α 2.Differential bank forces the current bottom to penetrate from two kinds of different angles after the bank end is chosen in disengaging, strengthens the bottom turbulent fluctuation, thereby entrainments more air, increases the aeration concentrater of current bottom.Its construction is simple; Obviously improve air entrainment, the protection length that prolongs aerator; On traditional aerator, only increase the differential of a small amount of height, less to the water surface curve influence, little to the surplus width of cloth influence of the safety of barrel.In hydraulic engineering, the investment of outlet structure escape works accounts for very big proportion, and it also is directly connected to the safe operation of engineering.The validity of this utility model is verification experimental verification, and is simple for structure, can effectively improve air entrainment, reduces construction costs, has good application prospects.
The purpose of this utility model, advantage and characteristics will illustrate by the non-limitative illustration of following preferential embodiment and explain that these embodiment only provide as an example with reference to accompanying drawing.
Description of drawings
Fig. 1 is that traditional aeration is chosen the bank schematic diagram.
Fig. 2 is that traditional aeration is chosen bank and aeration groove, fallen the aeration pattern that bank makes up.
Fig. 3 is the type structure schematic diagram that has only the differential type aeration to choose bank of the present utility model.
Fig. 4 is that differential type aeration of the present utility model is chosen bank and the type structure schematic diagram that falls the bank combination.
Fig. 5 is a kind of type structure schematic diagram that differential type aeration of the present utility model is chosen bank and the combination of aeration groove, and the high bank width that Parallel to the flow direction, differential type aeration are chosen bank increases gradually.
Fig. 6 is that differential type aeration of the present utility model is chosen bank and aeration groove, fallen a kind of type structure schematic diagram that bank makes up, and the high bank width that Parallel to the flow direction, differential type aeration are chosen bank reduces gradually.
Fig. 7 is the utility model experimental subjects engineering flood discharging tunnel longitudinal plan.
Fig. 8 is the plan view of this flood discharging tunnel among the utility model Fig. 7.
Fig. 9 is the utility model scheme No.1 corresponding upstream aeration facility shape figure.
Figure 10 is the utility model scheme No.1 corresponding downstream aeration facility shape figure.
Figure 11 is the utility model scheme No.2 corresponding upstream aeration facility shape figure.
Figure 12 is a 1-1 sectional drawing among the utility model Figure 11.
Figure 13 and Figure 14 are the utility model scheme No.2 corresponding downstream aeration facility shape figure.
Figure 14 is a 2-2 sectional drawing among the utility model Figure 13.
Figure 15 is that the utility model different schemes 1# section distributes along depth of water aeration concentrater.
Figure 16 is that the utility model different schemes 2# section distributes along depth of water aeration concentrater.
Figure 17 is that the utility model different schemes 3# section distributes along depth of water aeration concentrater.
Figure 18 is that the utility model different schemes 4# section distributes along depth of water aeration concentrater.
Figure 19 is that the utility model different schemes 5# section distributes along depth of water aeration concentrater.
Figure 20 is that the utility model different schemes 6# section distributes along depth of water aeration concentrater.
Figure 21 is that the utility model different schemes 7# section distributes along depth of water aeration concentrater.
Figure 22 is that the utility model different schemes 8# section distributes along depth of water aeration concentrater.
Figure 23 is that the utility model different schemes 9# section distributes along depth of water aeration concentrater.
Figure 24 is that the utility model different schemes 10# section distributes along depth of water aeration concentrater.
Figure 25 is that the utility model different schemes 11# section distributes along depth of water aeration concentrater.
The specific embodiment
Shown in Fig. 3-6, the utility model slotted flip bucket, it includes chooses bank body 1, and it is provided with and chooses bank 2 for a short time choosing on the bank body part, and choosing bank 2 for a short time is concavo-convex alternate differential flow-passing surface 3 with choosing the flow-passing surface that the bank body constitutes.For a short time the height Parallel to the flow direction of choosing bank 2 increases progressively gradually.Be to choose the bank height for a short time to raise gradually specifically, and the outer contour of choosing bank and the terminal section of choosing bank body formation for a short time is a concavo-convex alternate broken line to identical to terminal direction with water (flow) direction to choose the bank starting point for a short time.For a short time choose bank and choose bank for the dovetail shaped of projection, it is preface with the Parallel to the flow direction, and is front wide and rear narrow or beloid, chooses the also protruding strip of bank for a short time and chooses bank, and it is preface with the Parallel to the flow direction, and front and back are wide.
Embodiment one
Adopt 1: 30 several different aeration pattern of scale model of certain engineering to verify validity of the present utility model.
Under identical test conditions, only change and choose the bank shape in the air entraining facilities of upstream and downstream, the former molded dimension of each scheme correspondence is shown in Fig. 7-14.
As Fig. 7, shown in Figure 8, this flood discharging tunnel leading portion is that the long level of 287.6m has the section of pressure, the outlet arc is established behind the door and is fallen bank (0+291.10m place), falling bank rear portion flood discharging tunnel base slope (i1) is 0.2063, sets up two air entraining facilitieses of choosing bank and the combination of aeration groove at pile No. 0+374.63m (upstream is chosen bank and played slope point G11) and 0+472.02m (downstream is chosen bank and played slope point G12) respectively.In the flood discharge hole outlet section, from pile No. 0+555.88m, base slope becomes circular-arc (arc radius R=70m), and the rear portion goes out stream for the distortion bucket lip.
Each feature section pile No. is I-I:0+000.00m; II-II:0+020.00m; III-III:0+045.00m; IV-IV:0+265.60m; V-V:0+291.10m; VI-VI:0+297.60m; VII-VII:0+374.63m; VIII-VIII:0+472.02m; IX-IX:0+555.88m; X-X:0+601.77m.
Flood discharging tunnel has the mouth of extrusion (V-V section) wide 10m, and after this high 9m is the free flow section, and is constant to the flood discharging tunnel width maintenance 10m of pile No. 0+566.4m, both sides vertical abutment wall height 11.5m.
As shown in Figure 9, the corresponding upstream of scheme No.1 air entraining facilities, it is chosen bank and plays sloping point (G11) elevation 532.91m, and pile No. is 0+374.63m.L11=2.91m among the figure, L12=1.5m, L13=7.42m chooses bank height Δ 11=0.6m, aeration groove depth Δ 12=1.5m, flood discharging tunnel base slope i1=0.2063 chooses bank gradient i2=0.The flat section of aeration trough inner water elevation 530.55m.
As shown in figure 10, the corresponding downstream of scheme No.1 air entraining facilities, it is chosen bank and plays sloping point (G12) elevation 512.82m, and corresponding pile No. is 0+472.02m, chooses bank height Δ 13=0.4m, the flat section of aeration trough inner water elevation 510.65m, other shape parameter is with the upstream bank.
As Figure 11 and shown in Figure 12, the corresponding upstream of scheme No.2 air entraining facilities, scheme No.2 chooses on the bank part and sets up and choose bank for a short time in the upstream of scheme No.1, for a short time choosing bank, to play slope point identical with the former bank of choosing, Parallel to the flow direction, width remains unchanged, and highly (Δ 14) is 10cm, forms concavo-convex alternate differential pattern.For a short time the bank width (B1) of choosing of both sides is 0.625m, and other width (B2) is 1.25m.
As Figure 13 and shown in Figure 14, the corresponding downstream of scheme No.2 air entraining facilities, scheme No.2 chooses on the bank part and sets up and choose bank for a short time in the downstream of scheme No.1, for a short time choosing bank, to play slope point identical with the former bank of choosing, Parallel to the flow direction, width remains unchanged, and highly (Δ 14) is 10cm, forms concavo-convex alternate differential pattern.For a short time the bank width (B1) of choosing of both sides is 0.625m, and other width (B2) is 1.25m.
Test has arranged that altogether 11 aeration concentraters measure sections, and its middle and upper reaches are chosen behind the bank 6, and the downstream is chosen behind the bank 5, and each cross section place sees Table 1.
Table 1 flood discharging tunnel aeration is measured cross section place
| Numbering | Pile No. | Numbering | Pile No. |
| 1 # | 0+395.60 | 7 # | 0+498.00 |
| 2 # | 0+404.30 | 8 # | 0+506.10 |
| 3 # | 0+416.60 | 9 # | 0+525.00 |
| 4 # | 0+433.10 | 10 # | 0+546.00 |
| 5 # | 0+452.60 | 11 # | 0+562.50 |
| 6 # | 0+472.00 |
Wherein 1
#-6
#Section is positioned at 1
#Choose bank and 2
#Choose between the bank 7
#-11
#Section is positioned at 2
#After choosing bank.
Test model all adopts organic glass to make, and aeration concentrater adopts radio isotope aeration instrument to measure.Two prescription case comparative analyses have been carried out in test, and scheme No.1 adopts the aeration of conventional version to choose bank, the high 2.0cm of model bank; Scheme No.2 model has increased the wedge of 3.33mm on scheme No.1 model based, form the differential bank of low bank height 2.0cm, high bank height 2.33cm, and the high and low bank width of Parallel to the flow direction remains unchanged.
When upper pond level was 638.36m, corresponding prototype flood discharging tunnel flow was 3044m
3/ s, the air concentration value of the different depth of waters of each section of actual measurement is shown in Figure 15-25.In Figure 15-25, abscissa C represents aeration concentrater, and ordinate H1 is the corresponding section depth of water.
From Figure 15-20 as can be seen, choose the wedge that increases high 3.33mm (corresponding prototype height 10cm) on the bank model at traditional aeration, form slotted flip bucket, each the section bottom aeration concentrater behind the bank of upstream significantly increases; Equally as can be seen from Figure 21-25, change differential bank into after, each section bottom aeration concentrater behind the bank of downstream also significantly increases.By result of the test, slotted flip bucket can effectively increase the aeration concentrater of current bottom behind the bank.In engineering, influence the aeration concentrater that has only outlet structure escape works flow-passing surface contact position of air mixing corrosion reducing effect, aeration concentrater improves the cavitation erosion that helps reducing or remitting outlet structure escape works.Simultaneously, result of the test confirms that the water surface curve of scheme No.1 and scheme No.2 does not have significant difference.Therefore, choose bank with traditional aeration and compare, the utility model can effectively increase the aeration concentrater of current bottom behind the bank, does not push up the surplus width of cloth and can significantly not reduce the hole.
Above-mentioned design scheme is an embodiment in the utility model, adopts the high and low constant pattern of bank width of choosing of Parallel to the flow direction, and according to the difference of engineering actual conditions, the utility model can also adopt the high and low pattern of choosing the change of bank width of Parallel to the flow direction.
Above-mentioned design scheme adopts the differential type aeration to choose the pattern of bank and the combination of aeration groove, according to actual demands of engineering, the utility model can also adopt the differential type aeration to choose bank separately, perhaps the differential type aeration is chosen bank and is fallen the pattern that bank makes up, and perhaps the differential type aeration is chosen bank and aeration groove, fallen the pattern that bank makes up.Except that above-mentioned example, the utility model can also have other embodiment.The technical scheme of equal replacement of all employings or equivalent transformation all drops in the protection domain of the utility model requirement.
Claims (6)
1. a differential type aeration is chosen bank, and it includes chooses the bank body, it is characterized in that: be provided with and choose bank for a short time choosing on the bank body part, to play the slope point identical with choosing the bank body to choose bank for a short time, and the flow-passing surface of formation is concavo-convex alternate flow-passing surface.
2. choose bank according to claim 1 and 2 described a kind of differential type aerations, it is characterized in that: the height Parallel to the flow direction of choosing bank for a short time increases progressively gradually.
3. differential type aeration according to claim 1 is chosen bank, it is characterized in that: choose the bank height for a short time and raise gradually, and the outer contour of choosing bank and the terminal section of choosing bank body formation for a short time is a concavo-convex alternate broken line to identical to terminal direction with water (flow) direction to choose the bank starting point for a short time.
4. a kind of differential type aeration according to claim 3 is chosen bank, it is characterized in that: choose bank for a short time and choose bank for the dovetail shaped of projection, it is preface with the Parallel to the flow direction, and is front wide and rear narrow.
5. a kind of differential type aeration according to claim 3 is chosen bank, it is characterized in that: choose bank for a short time and choose bank for the dovetail shaped of projection, it is preface with the Parallel to the flow direction, and is beloid.
6. a kind of differential type aeration according to claim 3 is chosen bank, it is characterized in that: choose bank for a short time and choose bank for the strip of projection, it is preface with the Parallel to the flow direction, and front and back are wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620073701 CN200946261Y (en) | 2006-06-12 | 2006-06-12 | Differential type flip bucket for mixing air |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620073701 CN200946261Y (en) | 2006-06-12 | 2006-06-12 | Differential type flip bucket for mixing air |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200946261Y true CN200946261Y (en) | 2007-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620073701 Expired - Lifetime CN200946261Y (en) | 2006-06-12 | 2006-06-12 | Differential type flip bucket for mixing air |
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| CN (1) | CN200946261Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538840B (en) * | 2009-03-20 | 2011-02-09 | 四川大学 | Trajectory jet type energy dissipater in absorption basin |
| CN109356119A (en) * | 2018-11-23 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Let out slot aerator structure |
| CN111470710A (en) * | 2020-04-09 | 2020-07-31 | 河海大学 | Self-aeration oxygen-enriched ecological restoration device |
-
2006
- 2006-06-12 CN CN 200620073701 patent/CN200946261Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538840B (en) * | 2009-03-20 | 2011-02-09 | 四川大学 | Trajectory jet type energy dissipater in absorption basin |
| CN109356119A (en) * | 2018-11-23 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Let out slot aerator structure |
| CN111470710A (en) * | 2020-04-09 | 2020-07-31 | 河海大学 | Self-aeration oxygen-enriched ecological restoration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090617 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |