CN109295938A - A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure - Google Patents
A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure Download PDFInfo
- Publication number
- CN109295938A CN109295938A CN201811259469.1A CN201811259469A CN109295938A CN 109295938 A CN109295938 A CN 109295938A CN 201811259469 A CN201811259469 A CN 201811259469A CN 109295938 A CN109295938 A CN 109295938A
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- Prior art keywords
- discharging tunnel
- flood discharging
- corrosion inhibitor
- energy dissipating
- section
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- 238000007599 discharging Methods 0.000 title claims abstract description 73
- 230000007797 corrosion Effects 0.000 title claims abstract description 52
- 238000005260 corrosion Methods 0.000 title claims abstract description 52
- 239000003112 inhibitor Substances 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005276 aerator Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 102000004726 Connectin Human genes 0.000 description 1
- 108010002947 Connectin Proteins 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- 238000009423 ventilation Methods 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a kind of flood discharging tunnel energy dissipating corrosion inhibitor structures, by being provided with laminated structure in flood discharging tunnel high flow rate section, i.e. baffle wall style makes water flow form hydraulic jump and energy dissipating before having laminated structure, apply an opposition to catadromous water flow, to make water flow that hydraulic jump occur in hole, its fluidised form is set to be converted into flowing slowly by torrent rapidly, simultaneously, former flood discharging tunnel hole is pushed up to the pressure slope for pushing and forming height and gradually decreasing at the top of end sill, and by there is pressure section outlet height to control flood discharging tunnel downstream flow velocity, to which flow velocity in hole be greatly reduced, so that water flow forms pressure flow between end sill and pressure slope, after by energy dissipating corrosion inhibitor section energy dissipation by hydraulic jump and having pressure section tune stream, flow rate of water flow into flood discharging tunnel tract will significantly reduce, reduce flow velocity in hole to realize, reduce flood discharging tunnel wall surface cavitation corrosion risk due to caused by high flow rate, structural modeling letter Single, effect of energy dissipation is prominent, has biggish application value.
Description
Technical field
The invention belongs to hydraulic engineering technical fields, and in particular to a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure.
Background technique
In hydraulic and hydroelectric engineering, non-pressure tunnel is a kind of discharge structure being commonly used.With large-scale water conservancy and hydropower pivot
The construction of knob engineering, flood discharging tunnel vent flow significantly increase, and also straight line increases flood discharge head, and high water head necessarily brings high flow rate to ask
Topic, so that discharge structure be made to face great cavitation corrosion risk.
Generally, it is typically employed in discharge structure cross-sectional flow in engineering reaches 25~30m/s flow position and add and mix
Gas facility, by being continuously passed through air to water body to form aeration properties to overcurrent wall surface.This method construction is simple,
Significant effect is widely used in engineering circles；But for the biggish feelings of the depth of water in part Small Bottom Slope flood discharging tunnel and hole
Condition, since water flow Froude number is relatively small, aerated cavity is often easily flooded by return water, is ventilated to cannot achieve to water flow
Purpose.It is conventional as shown in Figure 1 without pressure flood discharging tunnel arrangement.Under extreme case, the setting of aerator is not able to achieve not only good
Ventilation, aerator become prominent body cavitation source instead, and the structure in turn resulting in flood discharging tunnel is destroyed.
Summary of the invention
The purpose of the present invention is to provide a kind of flood discharging tunnel energy dissipating corrosion inhibitor structures, with overcome the deficiencies in the prior art.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure disappears including being set to the energy dissipating corrosion inhibitor section of flood discharging tunnel middle reaches section and having pressure section
Energy corrosion inhibitor section has been set to pressure section upstream, and the flood discharging tunnel hole heights of roofs of energy dissipating corrosion inhibitor section is higher than flood discharging tunnel upstream hole heights of roofs, has
The flood discharging tunnel bottom plate of section is pressed to be equipped with baffle wall style, baffle wall style is higher than flood discharging tunnel bottom plate heights, is having former flood discharging tunnel at the top of pressure section
Hole top, which pushes, forms the pressure slope structure that height gradually decreases.
Further, energy dissipating corrosion inhibitor segment length is L1, it is obtained according to hydraulic jump length formula:
Q is flood discharging tunnel discharge per unit width, h in formula1For the preceding depth of water that jumps；
Energy dissipating corrosion inhibitor segment length L1=(1.1~1.3) L.
Further, it is H that the flood discharging tunnel hole heights of roofs of energy dissipating corrosion inhibitor section, which is higher than flood discharging tunnel upstream hole to rise angle value,2,
According to hydraulic jump equation:
Water depth after jump h can be acquired2,
It is H that the flood discharging tunnel hole heights of roofs of energy dissipating corrosion inhibitor section, which is higher than flood discharging tunnel upstream hole to rise angle value,2=(1.1~1.4) h2-
H1。
Further, baffle wall style is higher than flood discharging tunnel bottom plate heights value H3For 1.0~3.0m.
Further, there is pressure section outlet height H4=q/ (20~25).
Further, there is pressure segment length L2=(3~15) H4。
Compared with prior art, the invention has the following beneficial technical effects:
A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure, by being provided with laminated structure in flood discharging tunnel high flow rate section, i.e. baffle wall style makes water
Stream forms hydraulic jump and energy dissipating before having laminated structure, applies an opposition to catadromous water flow, so that water flow be made to exist
Hydraulic jump occurs in hole, its fluidised form is made to be converted into flowing slowly by torrent rapidly, meanwhile, by swaging under the top of former flood discharging tunnel hole at the top of end sill
At the pressure slope highly gradually decreased, and by there is pressure section outlet height to control flood discharging tunnel downstream flow velocity, to be greatly reduced in hole
Flow velocity by energy dissipating corrosion inhibitor section energy dissipation by hydraulic jump and has pressure section tune stream so that water flow forms pressure flow between end sill and pressure slope
Afterwards, into the flow rate of water flow of flood discharging tunnel tract will significantly reduce, thus realize reduce hole in flow velocity, reduce flood discharging tunnel wall surface by
The cavitation corrosion risk caused by high flow rate, the structural modeling is simple, and effect of energy dissipation is prominent, has biggish application value.
Detailed description of the invention
Fig. 1 is conventional without pressure flood discharging tunnel arragement construction schematic diagram.
Fig. 2 is high flow rate flood discharging tunnel energy dissipating corrosion inhibitor structural schematic diagram of the present invention.
Fig. 3 is energy dissipating corrosion inhibitor structure typical flow pattern structural schematic diagram of the present invention.
Wherein, 1- water surface curve；2- flood discharging tunnel hole top；3- flood discharging tunnel bottom plate；4- energy dissipating corrosion inhibitor section hole top；5- pressure slope；6- disappears
Power bank.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
As shown in Fig. 2, a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure, including be set to flood discharging tunnel middle reaches section energy dissipating corrosion inhibitor section and
There is pressure section, energy dissipating corrosion inhibitor section has been set to pressure section upstream, and the flood discharging tunnel hole heights of roofs of energy dissipating corrosion inhibitor section is higher than flood discharging tunnel upstream hole
Heights of roofs has the flood discharging tunnel bottom plate of pressure section to be equipped with baffle wall style, and baffle wall style is higher than flood discharging tunnel bottom plate heights, will at the top of pressure section having
Former flood discharging tunnel hole top, which pushes, forms the pressure slope structure that height gradually decreases.
As shown in figure 3, bottom plate, which is raised certain altitude, in the position 30~35m/s of conventional flood discharging tunnel cross-sectional flow forms tail
Bank applies an opposition to catadromous water flow, to make water flow that hydraulic jump occur in hole, make its fluidised form rapidly by
Torrent is converted into flowing slowly.Meanwhile former flood discharging tunnel hole being pushed up to the pressure slope for pushing and forming height and gradually decreasing at the top of end sill, so that water
Stream forms pressure flow between end sill and pressure slope.After by energy dissipating corrosion inhibitor section energy dissipation by hydraulic jump and having pressure section tune stream, into flood discharge
The flow rate of water flow of hole tract will significantly reduce, and reduce flow velocity in hole to realize, reduce the purpose of barrel wall surface cavitation corrosion risk.
If barrel is longer, the flow rate of water flow after energy dissipating corrosion inhibitor will likely increase to higher level again, at this time can be in high flow rate position
It sets and adds multistage energy dissipating corrosion inhibitor structure.
Energy dissipating corrosion inhibitor segment length L is determined first1, which obtains according to hydraulic jump length formulaQ is flood discharging tunnel discharge per unit width, h in formula1For jump before the depth of water,
To guarantee that water flow has part area of slack water after the completion of hydraulic jump, generally takes L1=(1.1~1.3) L；
Flow velocity reduces after hydraulic jump occurs due to energy dissipating corrosion inhibitor section, and the water surface will be increased significantly, needs letting out in energy dissipating corrosion inhibitor section
Hongdong Dong Ding increases, and so that the flood discharging tunnel hole heights of roofs of energy dissipating corrosion inhibitor section is higher than flood discharging tunnel upstream hole heights of roofs, according to hydraulic jump equation
Water depth after jump h can be acquired2, can use energy dissipating corrosion inhibitor section at this time relative to flood discharging tunnel upstream hole heights of roofs H1Increase part
Height H2=(1.1~1.4) h2-H1；
The high H of baffle wall style bank31.0~3.0m is taken, to guarantee that hydraulic jump can smoothly occur for energy dissipating corrosion inhibitor section；
Having pressure section is downstream flow velocity control section, will usually have pressure section exit velocity to be reduced to 20~25m/s, then there is pressure section
Outlet height H4=q/ (20~25).
To guarantee energy dissipating corrosion inhibitor section and having pressure section Current connectin smooth, unfavorable part is not generated around flow phenomenon, there will be pressure
Section import upper limb and lower edge carry out rounding processing.There is pressure segment length L2Mainly play rectified action, length L2=(3~15) H4。
For the present invention by being provided with laminated structure in flood discharging tunnel high flow rate section, i.e. baffle wall style forms water flow before having laminated structure
Hydraulic jump and energy dissipating, applying an opposition to catadromous water flow makes its stream to make water flow that hydraulic jump occur in hole
State is converted into flowing slowly by torrent rapidly, meanwhile, former flood discharging tunnel hole is pushed up to the pressure for pushing and forming height and gradually decreasing at the top of end sill
Slope, and by there is pressure section outlet height to control flood discharging tunnel downstream flow velocity, so that flow velocity in hole is greatly reduced, so that water flow is in end sill
Pressure flow is formed between pressure slope, after by energy dissipating corrosion inhibitor section energy dissipation by hydraulic jump and having pressure section tune stream, into flood discharging tunnel tract
Flow rate of water flow will significantly reduce, thus realize reduce hole in flow velocity, reduce flood discharging tunnel wall surface cavitation corrosion due to caused by high flow rate
Risk, the structural modeling is simple, and effect of energy dissipation is prominent, has biggish application value.
Claims (6)
1. a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure, which is characterized in that including be set to flood discharging tunnel middle reaches section energy dissipating corrosion inhibitor section and
There is pressure section, energy dissipating corrosion inhibitor section has been set to pressure section upstream, and the flood discharging tunnel hole heights of roofs of energy dissipating corrosion inhibitor section is higher than flood discharging tunnel upstream hole
Heights of roofs has the flood discharging tunnel bottom plate of pressure section to be equipped with baffle wall style, and baffle wall style is higher than flood discharging tunnel bottom plate heights, will at the top of pressure section having
Former flood discharging tunnel hole top, which pushes, forms the pressure slope structure that height gradually decreases.
2. a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure according to claim 1, which is characterized in that energy dissipating corrosion inhibitor segment length is L1,
It is obtained according to hydraulic jump length formula:
Q is flood discharging tunnel discharge per unit width, h in formula1For the preceding depth of water that jumps；
Energy dissipating corrosion inhibitor segment length L1=(1.1~1.3) L.
3. a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure according to claim 1, which is characterized in that the flood discharging tunnel of energy dissipating corrosion inhibitor section
It is H that hole heights of roofs, which is higher than flood discharging tunnel upstream hole to rise angle value,2, according to hydraulic jump equation:
Water depth after jump h can be acquired2,
It is H that the flood discharging tunnel hole heights of roofs of energy dissipating corrosion inhibitor section, which is higher than flood discharging tunnel upstream hole to rise angle value,2=(1.1~1.4) h2-H1。
4. a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure according to claim 1, which is characterized in that baffle wall style is higher than flood discharging tunnel bottom
Plate height value H3For 1.0~3.0m.
5. a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure according to claim 2, which is characterized in that there is pressure section outlet height H4=
Q/ (20~25).
6. a kind of flood discharging tunnel energy dissipating corrosion inhibitor structure according to claim 5, which is characterized in that there is pressure segment length L2=(3~
15)H4。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811259469.1A CN109295938A (en) | 2018-10-26 | 2018-10-26 | A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811259469.1A CN109295938A (en) | 2018-10-26 | 2018-10-26 | A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure |
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|---|---|
| CN109295938A true CN109295938A (en) | 2019-02-01 |
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| CN201811259469.1A Pending CN109295938A (en) | 2018-10-26 | 2018-10-26 | A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336067A (en) * | 2020-03-04 | 2020-06-26 | 陈金清 | Anti-corrosion offshore wind power and wind energy power generation equipment |
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|---|---|---|---|---|
| CN1873107A (en) * | 2006-06-20 | 2006-12-06 | 四川大学 | Dissipater of hole stopper |
| WO2013134886A1 (en) * | 2012-03-14 | 2013-09-19 | Jouni Jokela | Hydraulic structure for water flow control |
| CN105350502A (en) * | 2015-12-10 | 2016-02-24 | 中水东北勘测设计研究有限责任公司 | Method for improving flow regime of high velocity flow of sharp bend section in free-flow tunnel |
| CN106120678A (en) * | 2016-06-30 | 2016-11-16 | 中国电建集团昆明勘测设计研究院有限公司 | Non-pressure tunnel plane turns to Current connectin building |
| CN107503330A (en) * | 2017-07-10 | 2017-12-22 | 四川大学 | It is weak in hole to there is pressure is prominent to fall expansion type jet stiling basin energy-dissipating system |
| CN209066396U (en) * | 2018-10-26 | 2019-07-05 | 杨凌职业技术学院 | One kind is drained off floodwaters structure for flood discharging tunnel energy dissipating corrosion inhibitor |
-
2018
- 2018-10-26 CN CN201811259469.1A patent/CN109295938A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1873107A (en) * | 2006-06-20 | 2006-12-06 | 四川大学 | Dissipater of hole stopper |
| WO2013134886A1 (en) * | 2012-03-14 | 2013-09-19 | Jouni Jokela | Hydraulic structure for water flow control |
| CN105350502A (en) * | 2015-12-10 | 2016-02-24 | 中水东北勘测设计研究有限责任公司 | Method for improving flow regime of high velocity flow of sharp bend section in free-flow tunnel |
| CN106120678A (en) * | 2016-06-30 | 2016-11-16 | 中国电建集团昆明勘测设计研究院有限公司 | Non-pressure tunnel plane turns to Current connectin building |
| CN107503330A (en) * | 2017-07-10 | 2017-12-22 | 四川大学 | It is weak in hole to there is pressure is prominent to fall expansion type jet stiling basin energy-dissipating system |
| CN209066396U (en) * | 2018-10-26 | 2019-07-05 | 杨凌职业技术学院 | One kind is drained off floodwaters structure for flood discharging tunnel energy dissipating corrosion inhibitor |
Non-Patent Citations (1)
| Title |
|---|
| 吴持恭: "水力学上册", 高等教育出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336067A (en) * | 2020-03-04 | 2020-06-26 | 陈金清 | Anti-corrosion offshore wind power and wind energy power generation equipment |
| CN111336067B (en) * | 2020-03-04 | 2022-01-25 | 上海姬效企业咨询有限公司 | Anti-corrosion offshore wind power and wind energy power generation equipment |
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Application publication date: 20190201 |
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