CN106759138A - Water-gas combined balance waterpower automatic overflow weir - Google Patents
Water-gas combined balance waterpower automatic overflow weir Download PDFInfo
- Publication number
- CN106759138A CN106759138A CN201710111884.1A CN201710111884A CN106759138A CN 106759138 A CN106759138 A CN 106759138A CN 201710111884 A CN201710111884 A CN 201710111884A CN 106759138 A CN106759138 A CN 106759138A
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- Prior art keywords
- water
- overflow
- floating casing
- dam body
- pond
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
Abstract
The invention discloses the water-gas combined balance waterpower automatic overflow weir of one kind, including dam body and overflow pond, the dam body top is provided with cavity, the cavity and dam body upstream water communication, the floating casing of bottom opening is provided with the cavity, the floating casing top is provided with weir plate, and the weir plate is exposed to outside dam body through dam body top；The static housing of lower openings is provided with the overflow pond, the cross-sectional area of the static housing and floating casing is equal, the static housing and floating casing internal upper part space are gas, and be interconnected by air communicating pipe, lower space is connected with water body in cavity in floating casing, lower space is connected with overflow pond pool inner water body in the static housing, and the water body in the overflow pond is flushed with overflow pond pond face.Using water-gas combined automatic overflow and water level regulation, operation need not apply additional energy source, energy-conserving and environment-protective.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering field, and in particular to a kind of water-gas combined balance waterpower automatic overflow weir.
Technical background
Most medium and small reservoirs engineerings control elevation of weir crest using reservoir operation scheme as overflow, more than this water level elevation
Flood can be by spillway, or Overflow Section is let out safely toward downstream, it is ensured that the safety of dam engineering；And most large-scale water conservancies
Hydroelectric project, in order to improve reservoir engineering benefit, particularly increases productive head and improves power benefit, determines just in planning
Normal water storage level sets regulating gate higher than spillway, or Overflow Section elevation of weir crest in spillway, or the weir crest of downflow weir,
The flexible flood-control scheduling control of reservoir is realized, is reached while both improve project benefit, also ensure that dam engineering flood control safety, subtracted
The purpose of small construction investment.
China's medium and small-scale water and electricity engineering is numerous, the unrealized gate control flood discharge of most of reservoirs, and head and water resource do not have
It is fully utilized, causes the waste of hydraulic power potentials.If realizing gate control, again can be existing by medium and small-scale water and electricity engineering
Have a managerial skills, including supervisor of construction level, the limitation of gate automatic control level, reservoir strobe scheduling controlling without
Method is reasonably ensured that operation is unreasonable not to play project benefit not only, or even causes reservior safety and flood protec- tion accident.
The content of the invention
It is an object of the present invention to overcome the above deficiencies, there is provided a kind of water-gas combined balance waterpower automatic overflow weir,
Traditional technology limitation is breached, hydraulic power potentials could not be obtained in solving existing hydroelectric project technology in a kind of brand-new method
Make full use of, the low problem of reservoir water resource automatic operating managerial skills.
To achieve these goals, the water-gas combined balance waterpower automatic overflow weir designed by the present invention, its special character
It is：Including dam body and overflow pond, the dam body top is provided with cavity, the cavity and dam body upstream water communication, institute
The floating casing that bottom opening is provided with cavity is stated, the floating casing top is provided with weir plate, and the weir plate passes through dam body
Top is exposed to outside dam body；The static housing of lower openings, the static housing and floating casing are provided with the overflow pond
Cross-sectional area it is equal, the static housing and floating casing internal upper part space are gas, and by air communicating pipe phase
Intercommunicated, lower space is connected with water body in cavity in floating casing, lower space and overflow pond pond in the static housing
Interior water body connection, the water body in the overflow pond is flushed with overflow pond pond face.
Further, the filling pipe for overflow water replenishment is connected with the overflow basin side wall.
Further, for convenience of the supply of overflow water pool inner water body, the overflow pond is arranged on dam body downstream and is close to
At dam body, by the bleeder pipe supply of connection reservoir ecological flow, water source has been saved.
Yet further, the blowdown pipe with valve is additionally provided with the air communicating pipe, facilitates floating casing and fixation
The supply of gas in casing, it is ensured that the normal operation of overflow of the present invention., by air compressor machine tonifying Qi, air compressor machine is with pressure for blowdown pipe
Check that pressure gauge judges whether to need tonifying Qi during power table, flood.
Yet further, to prevent floating casing from toppling, influence the function of whole downflow weir, the floating casing with
Slip constraint is additionally provided between cavity sidewalls.
Yet further, the cavity sidewalls are provided with the water inlet connected with dam body upstream at dam crest.
The advantage of the invention is that：
Design dam body cavity, overflow pond, and design the floating casing and static housing of internal gas connection.
1st, using water-gas combined automatic overflow and water level regulation, operation need not apply additional energy source, energy-conserving and environment-protective.
2nd, the productive head and hydraulic power potentials utilization rate of medium and small reservoirs can be improved, so that power benefit is improved, with general
All over the value promoted, Social benefit and economic benefit is huge.
3rd, can realize that medium and small reservoirs do not need automatic control device and manual monitoring, by the present apparatus and technology,
Automatically adjust the water level and earial drainage of reservoir, it is ensured that dam safety.
Brief description of the drawings
Fig. 1 is the water-gas combined balance waterpower automatic overflow weir structural representation of the present invention
Fig. 2 is working state structure schematic diagram of the present invention.
Fig. 3 is present invention another kind working state structure schematic diagram.
In figure：Dam body 1, cavity 1.1, weir plate 2, floating casing 3, static housing 4, overflow pond 5, water inlet 6 is slided about
Beam 7, air communicating pipe 8, blowdown pipe 9, filling pipe 10, gas 11, c top gear water levels, d relative constancy water levels, the minimum retainings of e
Position.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
Water-gas combined balance waterpower automatic overflow weir as shown, including dam body 1 and overflow pond 5, the top of dam body 1 are set
There are cavity 1.1, cavity 1.1 and the upstream water communication of dam body 1, specifically, the side wall of cavity 1.1 is provided with and dam body at dam crest
The water inlet 6 of 1 upstream connection, is provided with the floating casing 3 of bottom opening in cavity 1.1, the top of floating casing 3 is provided with weir plate
2, weir plate 2 is exposed to outside dam body 1 through the top of dam body 1；The static housing 4 of lower openings, static housing are provided with overflow pond 5
4 is equal with the cross-sectional area of floating casing 3, and static housing 4 and the internal upper part space of floating casing 3 are gas 11, and pass through
Air communicating pipe 8 is interconnected, and the water body in overflow pond 5 is flushed with the pond face of overflow pond 5.
The filling pipe 10 for overflow water replenishment is connected with the side wall of overflow pond 5.For convenience of overflow water pool inner water
The supply of body, overflow pond 5 is arranged on the downstream of dam body 1 at dam body, by the bleeder pipe supply of connection reservoir ecological flow, saves
Water source.The blowdown pipe 9 with valve is additionally provided with air communicating pipe 8, facilitates the benefit of gas in floating casing and static housing
Give, it is ensured that the normal operation of overflow of the present invention.Blowdown pipe 9 passes through air compressor machine tonifying Qi, during air compressor machine carries pressure gauge, flood
Check that pressure gauge judges whether to need tonifying Qi.To prevent floating casing from toppling, the function of whole downflow weir, floating case are influenceed
Slip constraint 7 is additionally provided between body 3 and the side wall of cavity 1.1.Wherein the side wall of cavity 1.1 is provided with and dam body 1 at dam crest
The water inlet 6 of upstream connection.
In the present invention, weir plate 2 uses rectangular thin-wall weir plate, weir plate 2 to be fixed in dam on free floating casing 3, and weir plate 2 is high
Be L, with the lifting of floating casing 3 one, floating casing 3 in the case where surrounding side wall slides constraint 7, can freely on float downward
It is dynamic.Static housing 4 is placed in Ba Xiayouchu, is fixed in overflow pond 5, the area of section of static housing 4 and the section face of floating casing 3
Product is equal, is S, and the gas in dam in floating casing 3 is connected the gas in casing 4, forms a linker.Due to cunning
The only anti-casing of the middle pulley of moving constraint 7 is toppled, so producing sliding frictional force very little, can be ignored, and floating casing 3 is received in dam
Gas uplift pressure acts on rSHA and casing deadweight G, casing upper water weight rSL and 1 couple of pressure F1 of floating 3 of dam body and puts down in case
Weighing apparatus, gas pressure intensity is equal with gas pressure intensity in floating casing 3 in dam in static housing 4 outside dam.
When reservoir level is located at relative constancy water level d, the stress balance of floating casing 3 in dam：
F1+G+rSL=rSHA (1)
Now, HA=(F1+G+rSL)/rS, floating casing 3 is equal with the gas pressure intensity of static housing 4：
RHA=rHB (2)
As shown in Fig. 2 when reservoir increases because of rainfall water, it is assumed that water level rises h1, now the upper water weight of floating casing 3
Increase, the increase of internal gas pressure, the stress balance of floating casing 3：
F1+G+rS (L+h1)=rS (HA+h1) (3)
Floating casing 3 and the gas pressure intensity of static housing 4 are unequal：
r(HA+h1)>RhB (4)
First assume that gas is incompressible in case, in order to maintain the balance of floating casing 3 and the gas pressure intensity of static housing 4,
Gas in floating casing 3 is moved to static housing 4, and water level rises x in floating casing 3, and floating casing 3 is motionless, static housing 4
Interior water level decreasing x, gas volume is constant, in order to maintain floating casing 3 equal with the gas pressure intensity of static housing 4,
Now floating casing 3 is equal with the gas pressure intensity of static housing 4:
The now stress balance of floating casing 3：
When h1 meets h1=2F1/rS, F=0, floating casing 3 is in borderline balance state, when water level continues to rise,
Therefore floating casing 3 sinks, it is assumed that the one small quantity y of sinking of floating casing 3, now the water surface in floating casing 3
To declineLiquid level in static housing 4 declinesThe gas pressure intensity of floating casing 3 and static housing 4 remains equal：
The now force unbalance of floating casing 3：
Therefore, floating casing 3 will persistently sink down into bottom, and reservoir spillway reaches maximum, now the stress of floating casing 3
For：
Floating casing 3 is equal with the gas pressure intensity of static housing 4：
Therefore, when water level is increased beyond h1, during higher than top gear water level c, floating casing 3 sinks down into bottom.
After flood, reservoir level begins to decline, when reservoir level is down to below relative constancy water level d D, floating case
Body 3 is equal with the gas pressure intensity of static housing 4, and liquid level declines in floating casing 3Liquid level rises in static housing 4
The gas pressure intensity of floating casing 3 and static housing 4 remains equal：
Downward power suffered by floating casing 3 is G+rS (L+L-D), and suffered uplift pressure is rS
Obtained by formula (1)：HA=(F1+G+rSL)/rS,So suffered uplift pressure isWork as D<During L-h1：
As D=L-h1, the stress of floating casing 3 reaches critical balance:
Now reservoir level continues to decline, D>During L-h1, the stress of floating casing 3 is：
Now, floating casing 3 will rise, it is assumed that floating casing 3 rises a small quantity a, now the water in floating casing 3
Face will riseLiquid level in static housing 4 risesThe gas pressure intensity of floating casing 3 and static housing 4 remains equal：
Now the stress of floating casing 3 is：
Therefore, floating casing 3 will persistently rise, and floating casing 3 rises to top, retains Partial Flood tail water.
Therefore, when reservoir water level descending is to minimum water storage level e, floating casing 3 rises.
In above analyzing, it is assumed that gas is incompressible, and gas has compressibility in true top box, works as reservoir level
When rising h1-2 Δ Z, gas pressure intensity increase in case, gas compression in case, in order to maintain gas pressure intensity in two empty vans consistent, two is empty
Gas compresses Δ Z simultaneously in case.Assuming that water level decreasing in floating casing 3Floating casing 3 is motionless, static housing 4
Water level decreasingNow floating casing 3 is equal with the gas pressure intensity of static housing 4, the stress balance of floating casing 3：
It follows that when reservoir is to flow increase, floating casing 3 declines, overflow weir 2 declines therewith, and reservoir earial drainage increases
Plus, because gas has compressibility in floating casing 3, reservoir level declines therewith, and maintains the relative constancy of water level.Work as water
Storehouse is flowed during reduction, and floating casing 3 rises therewith, overflow weir 2 rises therewith, reduces reservoir earial drainage, and reservoir level is on
Rise, maintain the relative constancy of water level.
Water-gas combined balance waterpower automatic overflow weir of the invention, can by the gentle joint internal balance mechanism of water,
Automatic lifting adjusts downflow weir elevation of weir crest, realizes that the relative constancy of medium and small reservoirs water levels is automatically adjusted, and improves reservoir
Normal pool level, increases productive head, intercepts Partial Flood afterbody magnanimity, reduces the reservoir water energy wasting of resources, so as to increase work
The power benefit of journey, and the good service condition of relative constancy head is provided for power station.
Claims (6)
- It is 1. water-gas combined to balance waterpower automatic overflow weir, it is characterised in that：Including dam body（1）With overflow pond（5）, the dam body （1）Top is provided with cavity（1.1）, the cavity（1.1）With dam body（1）Upstream water communication, the cavity（1.1）Interior setting There is the floating casing of bottom opening（3）, the floating casing（3）Top is provided with weir plate（2）, the weir plate（2）Through dam body （1）Top is exposed to dam body（1）Outward；The overflow pond（5）Inside it is provided with the static housing of lower openings（4）, the fixed case Body（4）With floating casing（3）Cross-sectional area it is equal, the static housing（4）With floating casing（3）Internal upper part space is Gas（11）, and by air communicating pipe（8）It is interconnected, the overflow pond（5）Interior water body and overflow pond（5）Pond face Flush.
- 2. water-gas combined balance waterpower automatic overflow weir according to claim 1, it is characterised in that：The overflow pond （5）It is connected with the wall of side for overflow pond（5）The filling pipe of moisturizing（10）.
- 3. water-gas combined balance waterpower automatic overflow weir according to claim 2, it is characterised in that：The overflow pond （5）It is arranged on dam body（1）Downstream is at dam body.
- 4. water-gas combined balance waterpower automatic overflow weir according to claim 3, it is characterised in that：The air communicating pipe （8）On be additionally provided with the blowdown pipe with valve（9）.
- 5. water-gas combined balance waterpower automatic overflow weir according to claim 4, it is characterised in that：The floating casing （3）With cavity（1.1）Slip constraint is additionally provided between the wall of side（7）.
- 6. water-gas combined balance waterpower automatic overflow weir according to claim 5, it is characterised in that：The cavity（1.1） Side wall is provided with and dam body at dam crest（1）The water inlet of upstream connection（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710111884.1A CN106759138B (en) | 2017-02-28 | 2017-02-28 | Water-gas combined balance waterpower automatic overflow weir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710111884.1A CN106759138B (en) | 2017-02-28 | 2017-02-28 | Water-gas combined balance waterpower automatic overflow weir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106759138A true CN106759138A (en) | 2017-05-31 |
| CN106759138B CN106759138B (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710111884.1A Expired - Fee Related CN106759138B (en) | 2017-02-28 | 2017-02-28 | Water-gas combined balance waterpower automatic overflow weir |
Country Status (1)
| Country | Link |
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| CN (1) | CN106759138B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162245A (en) * | 2018-08-22 | 2019-01-08 | 上海勘测设计研究院有限公司 | Floating type water level regulation dam |
| CN110700191A (en) * | 2019-11-15 | 2020-01-17 | 中国水利水电科学研究院 | Constant-flow water drain weir based on movable pulley block structure and initial state setting method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0487692A (en) * | 1990-07-27 | 1992-03-19 | Hitachi Kiden Kogyo Ltd | Method for discharging supernatant water |
| CN1434172A (en) * | 2003-01-27 | 2003-08-06 | 武汉大学 | Hydraulic automatic constant water level downflow weir |
| CN1609358A (en) * | 2003-10-21 | 2005-04-27 | 薛林川 | Limited shutoff apparatus |
| CN101444678A (en) * | 2008-12-02 | 2009-06-03 | 杭州杭氧股份有限公司 | Multi-overflow circle tower plate |
| CN201670780U (en) * | 2010-04-01 | 2010-12-15 | 北京朗林德通环保科技有限公司 | Overflow guiding device |
| CN104878832A (en) * | 2015-05-15 | 2015-09-02 | 武汉圣禹排水系统有限公司 | Reverse downstream waterpower automatic gate |
-
2017
- 2017-02-28 CN CN201710111884.1A patent/CN106759138B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0487692A (en) * | 1990-07-27 | 1992-03-19 | Hitachi Kiden Kogyo Ltd | Method for discharging supernatant water |
| CN1434172A (en) * | 2003-01-27 | 2003-08-06 | 武汉大学 | Hydraulic automatic constant water level downflow weir |
| CN1609358A (en) * | 2003-10-21 | 2005-04-27 | 薛林川 | Limited shutoff apparatus |
| CN101444678A (en) * | 2008-12-02 | 2009-06-03 | 杭州杭氧股份有限公司 | Multi-overflow circle tower plate |
| CN201670780U (en) * | 2010-04-01 | 2010-12-15 | 北京朗林德通环保科技有限公司 | Overflow guiding device |
| CN104878832A (en) * | 2015-05-15 | 2015-09-02 | 武汉圣禹排水系统有限公司 | Reverse downstream waterpower automatic gate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162245A (en) * | 2018-08-22 | 2019-01-08 | 上海勘测设计研究院有限公司 | Floating type water level regulation dam |
| CN110700191A (en) * | 2019-11-15 | 2020-01-17 | 中国水利水电科学研究院 | Constant-flow water drain weir based on movable pulley block structure and initial state setting method thereof |
| CN110700191B (en) * | 2019-11-15 | 2024-03-15 | 中国水利水电科学研究院 | Constant-current water discharge weir based on movable pulley block structure and initial state setting method thereof |
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| Publication number | Publication date |
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| CN106759138B (en) | 2019-01-29 |
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Granted publication date: 20190129 Termination date: 20200228 |