CN106759138B - Water-gas combined balance waterpower automatic overflow weir - Google Patents
Water-gas combined balance waterpower automatic overflow weir Download PDFInfo
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- CN106759138B CN106759138B CN201710111884.1A CN201710111884A CN106759138B CN 106759138 B CN106759138 B CN 106759138B CN 201710111884 A CN201710111884 A CN 201710111884A CN 106759138 B CN106759138 B CN 106759138B
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- water
- overflow
- pond
- dam body
- cavity
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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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Barrages (AREA)
Abstract
The invention discloses a kind of water-gas combined balance waterpower automatic overflow weirs, including dam body and overflow pond, the dam body top is provided with cavity, the cavity and dam body upstream water communication, the floating cabinet of bottom opening is provided in the cavity, the floating top of the box is provided with weir plate, and the weir plate passes through to be exposed to outside dam body at the top of dam body；The static housing of lower openings is provided in the overflow pond, the cross-sectional area of the static housing and floating cabinet is equal, the static housing and floating cabinet inner upper space are gas, and it is interconnected by air communicating pipe, lower space is connected to water body in cavity in floating cabinet, the fixed inside the box lower space is connected to overflow pond pool inner water body, 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 does not need to apply additional energy source, energy conservation and environmental protection.
Description
Technical field
The invention belongs to hydraulic and hydroelectric engineering fields, 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, are more than this water level elevation
Flood can be let out safely by spillway or Overflow Section 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, especially increase productive head improves power benefit, determines just in planning
Normal water storage level is higher than spillway or Overflow Section elevation of weir crest, and regulating gate is arranged in the weir crest of spillway or overflow weir,
The flexible flood-control scheduling control for realizing reservoir, reaches while both improve project benefit, also ensures that dam engineering flood control safety, subtract
The purpose of small construction investment.
China's medium and small-scale water and electricity engineering is numerous, and most of reservoirs are not implemented gate and control flood discharge, and head and water resource do not have
It is fully utilized, causes the waste of hydraulic power potentials.If realizing gate control, and it is existing to will receive medium and small-scale water and electricity engineering
Have management level, the limitation of level, gate automatic control level including supervisor of construction, 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.
Summary of the invention
It is an object of the present invention to overcome the above deficiencies, provides a kind of water-gas combined balance waterpower automatic overflow weir,
Traditional technology limitation is breached, solving hydraulic power potentials in existing hydroelectric project technology in a kind of completely new method could not obtain
It makes full use of, the low problem of reservoir water resource automatic operating management level.
To achieve the goals above, the water-gas combined balance waterpower automatic overflow weir designed by the present invention, special character
Be: 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 cabinet that bottom opening is provided in cavity is stated, the floating top of the box 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 cabinet are provided in the overflow pond
Cross-sectional area it is equal, the static housing and floating cabinet inner upper space are gas, and pass through air communicating pipe phase
Intercommunicated, lower space is connected to water body in cavity in floating cabinet, the fixed inside the box lower space and overflow pond pond
Interior water body is connected to, and the water body in the overflow pond is flushed with overflow pond pond face.
Further, the water supply pipe for overflow water replenishment is connected on the overflow basin side wall.
Further, for convenience of the supply of overflow water pool inner water body, the overflow pond setting is close in dam body downstream
At dam body, by connection reservoir ecological flow bleeder pipe supply, water source has been saved.
Still further, being additionally provided with the blowdown pipe with valve on the air communicating pipe, facilitate floating cabinet and fixation
The supply of gas in cabinet, ensure that the normal operation of overflow of the present invention.Blowdown pipe is by air compressor machine tonifying Qi, and air compressor machine is with pressure
Power table checks that pressure gauge judges whether to need tonifying Qi during flood.
Still further, to prevent floating cabinet from toppling, influence the function of entire overflow weir, the floating cabinet and
Sliding constraint is additionally provided between cavity sidewalls.
Still further, the cavity sidewalls are provided with the water inlet being connected to dam body upstream at dam crest.
The present invention has the advantages that
Dam body cavity, overflow pond are designed, and designs the floating cabinet and static housing of internal gas connection.
1, using water-gas combined automatic overflow and water level regulation, operation does not need to apply additional energy source, energy conservation and environmental protection.
2, the productive head and hydraulic power potentials utilization rate of medium and small reservoirs can be improved, to improve power benefit, is had general
All over the value promoted, Social benefit and economic benefit is huge.
3, medium and small reservoirs be can be realized and do not need automatic control device and artificial monitoring, by the present apparatus and technology,
Automatically adjust the water level and aerial drainage of reservoir, it is ensured that dam safety.
Detailed description of the invention
Fig. 1 is water-gas combined balance waterpower automatic overflow of the invention weir structural schematic diagram
Fig. 2 is working state structure schematic diagram of the present invention.
Fig. 3 is another working state structure schematic diagram of the present invention.
In figure: dam body 1, cavity 1.1, weir plate 2, floating cabinet 3, static housing 4, overflow pond 5, water inlet 6, sliding is about
Beam 7, air communicating pipe 8, blowdown pipe 9, water supply pipe 10, gas 11, c top gear water level, the relative constant water level of d, the minimum water storage of e
Position.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments:
Water-gas combined balance waterpower automatic overflow weir as shown, including dam body 1 and overflow pond 5, the setting of 1 top of dam body
There are cavity 1.1, cavity 1.1 and 1 upstream water communication of dam body, specifically, 1.1 side wall of cavity is provided at dam crest and dam body
The water inlet 6 of 1 upstream connection is provided with the floating cabinet 3 of bottom opening in cavity 1.1, is provided with weir plate at the top of floating cabinet 3
2, weir plate 2 passes through to be exposed to outside dam body 1 at the top of dam body 1；The static housing 4 of lower openings, static housing are provided in overflow pond 5
4 is equal with the cross-sectional area of floating cabinet 3, and static housing 4 and 3 inner upper space of floating cabinet are gas 11, and are passed through
Air communicating pipe 8 is interconnected, and the water body in overflow pond 5 is flushed with 5 pond face of overflow pond.
The water supply pipe 10 for overflow water replenishment is connected on 5 side wall of overflow pond.For convenience of overflow water pool inner water
The supply of body, overflow pond 5 are arranged in 1 downstream of dam body at dam body, by connection reservoir ecological flow bleeder pipe supply, save
Water source.It is additionally provided with the blowdown pipe 9 with valve on air communicating pipe 8, facilitates the benefit of floating cabinet and fixed inside the box gas
It gives, ensure that the normal operation of overflow of the present invention.For blowdown pipe 9 by air compressor machine tonifying Qi, air compressor machine has a pressure gauge, during flood
Check that pressure gauge judges whether to need tonifying Qi.To prevent floating cabinet from toppling, the function of entire overflow weir, floating case are influenced
Sliding constraint 7 is additionally provided between 1.1 side wall of body 3 and cavity.Its 1.1 side wall of hollow cavity 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, and weir plate 2 is fixed in dam on free floating cabinet 3, and weir plate 2 is high
For L, with 3 one lifting of floating cabinet, floating cabinet 3 in the case where surrounding side wall sliding constraint 7, can freely on float downward
It is dynamic.Static housing 4 is placed in Ba Xiayouchu, is fixed in overflow pond 5,4 area of section of static housing and 3 section face of floating cabinet
Product is equal, is S, the gas in dam in floating cabinet 3 is connected and fixed the gas in cabinet 4, forms a linker.Due to cunning
Only anti-cabinet topples 7 middle pulley of moving constraint, thus generate sliding frictional force very little, can be ignored, in dam floating cabinet 3 by
Gas uplift pressure acts on the pressure F1 of rSHA and cabinet self weight G, cabinet upper water weight rSL and 1 pair of dam body floating 3 and puts down in case
Weighing apparatus, outside dam in static housing 4 gas pressure intensity with gas pressure intensity is equal in floating cabinet 3 in dam.
When reservoir level is located at relative constant water level d, the stress balance of floating cabinet 3 in dam:
F1+G+rSL=rSHA (1)
At this point, HA=(F1+G+rSL)/rS, floating cabinet 3 are 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, at this time 3 upper water weight of floating cabinet
Increase, internal gas pressure increases, 3 stress balance of floating cabinet:
F1+G+rS (L+h1)=rS (HA+h1) (3)
Floating cabinet 3 and 4 gas pressure intensity of static housing are unequal:
r(HA+h1)>RhB (4)
First assume that gas is incompressible in case, in order to maintain the balance of floating cabinet 3 with the gas pressure intensity of static housing 4,
Gas in floating cabinet 3 is mobile to static housing 4, and water level rises x in floating cabinet 3, and floating cabinet 3 is motionless, static housing 4
Interior water level decreasing x, gas volume is constant, in order to maintain floating cabinet 3 equal with the gas pressure intensity of static housing 4,
Floating cabinet 3 is equal with the gas pressure intensity of static housing 4 at this time:
The stress balance of floating cabinet 3 at this time:
When h1 meets h1=2F1/rS, F=0, floating cabinet 3 is in borderline balance state, when water level continues to rise,
Therefore floating cabinet 3 sinks, it is assumed that floating cabinet 3 sinks a small quantity y, the water surface in floating cabinet 3 at this time
It will declineLiquid level decline in static housing 4The gas pressure intensity of floating cabinet 3 and static housing 4 remains equal:
The force unbalance of floating cabinet 3 at this time:
Therefore, floating cabinet 3 will persistently sink down into bottom, and reservoir spillway reaches maximum, at this time the stress of floating cabinet 3
Are as follows:
Floating cabinet 3 is equal with the gas pressure intensity of static housing 4:
Therefore, when water level is increased beyond h1, when being higher than top gear water level c, floating cabinet 3 sinks down into bottom.
After flood, reservoir level is begun to decline, when reservoir level is down to relative constant water level d or less D, floating case
Body 3 is equal with the gas pressure intensity of static housing 4, and liquid level declines in floating cabinet 3Liquid level rises in static housing 4
The gas pressure intensity of floating cabinet 3 and static housing 4 remains equal:
Downward power suffered by floating cabinet 3 is G+rS (L+L-D), and suffered uplift pressure is rS
It is obtained by formula (1): HA=(F1+G+rSL)/rS,So suffered uplift pressure isAs D < L-h1:
As D=L-h1,3 stress of floating cabinet reaches critical balance:
Reservoir level continues to decline at this time, when D > L-h1,3 stress of floating cabinet are as follows:
At this point, floating cabinet 3 will rise, it is assumed that floating cabinet 3 rises a small quantity a, at this time the water in floating cabinet 3
Face will riseLiquid level in static housing 4 risesThe gas pressure intensity of floating cabinet 3 and static housing 4 remains equal:
3 stress of floating cabinet at this time are as follows:
Therefore, floating cabinet 3 will persistently rise, and floating cabinet 3 rises to top, retain Partial Flood tail water.
Therefore, when reservoir water level descending is to minimum water storage level e, floating cabinet 3 rises.
In front in analysis, 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 increases in case, gas compression in case, and 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 cabinet 3Floating cabinet 3 is motionless, static housing 4
Water level decreasingFloating cabinet 3 is equal with the gas pressure intensity of static housing 4 at this time, 3 stress balance of floating cabinet:
It follows that floating cabinet 3 declines when reservoir incoming flow increases, overflow weir 2 declines therewith, and reservoir aerial drainage increases
Add, since gas has compressibility in floating cabinet 3, reservoir level declines therewith, and maintains the relative constant of water level.Work as water
When library incoming flow reduces, floating cabinet 3 is risen with it, and overflow weir 2 rises with it, and reduces reservoir aerial drainage, reservoir level is on
It rises, maintains the relative constant of water level.
Water-gas combined balance waterpower automatic overflow weir of the invention, joint internal balance mechanism that can be gentle by water,
Automatic lifting adjusts overflow weir elevation of weir crest, realizes the relative constant automatic adjustment of medium and small reservoirs water level, improves reservoir
Normal pool level increases productive head, intercepts Partial Flood tail portion magnanimity, reduces the wasting of resources of reservoir water energy, to increase work
The power benefit of journey, and the good service condition of relative constant head is provided for power station.
Claims (6)
1. water-gas combined balance waterpower automatic overflow weir, it is characterised in that: including dam body (1) and overflow pond (5), the dam body
(1) top is provided with cavity (1.1), the cavity (1.1) and dam body (1) upstream water communication, setting in the cavity (1.1)
There is the floating cabinet (3) of bottom opening, be provided with weir plate (2) at the top of the floating cabinet (3), the weir plate (2) passes through dam body
(1) top is exposed to dam body (1) outside；Overflow pond (5) setting is provided in dam body (1) downstream, the overflow pond (5)
The cross-sectional area of the static housing (4) of lower openings, the static housing (4) and floating cabinet (3) is equal, the fixed case
Body (4) and floating cabinet (3) inner upper space are gas (11), and are interconnected by air communicating pipe (8), the overflow
Water body in pond (5) is flushed with overflow pond (5) pond face.
2. water-gas combined balance waterpower automatic overflow weir according to claim 1, it is characterised in that: the overflow pond
(5) water supply pipe (10) for overflow pond (5) moisturizing is connected on side wall.
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 in dam body (1) downstream 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) blowdown pipe (9) with valve is additionally provided on.
5. water-gas combined balance waterpower automatic overflow weir according to claim 4, it is characterised in that: the floating cabinet
(3) sliding constraint (7) is additionally provided between cavity (1.1) side wall.
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 the water inlet (6) being connected to dam body (1) upstream at dam crest.
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 |
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| Publication Number | Publication Date |
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| CN106759138A CN106759138A (en) | 2017-05-31 |
| CN106759138B true CN106759138B (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710111884.1A Expired - Fee Related CN106759138B (en) | 2017-02-28 | 2017-02-28 | Water-gas combined balance waterpower automatic overflow weir |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162245B (en) * | 2018-08-22 | 2024-07-02 | 上海勘测设计研究院有限公司 | Floating water level regulating dam |
| 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 |
Family Cites Families (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 |
| CN1174301C (en) * | 2003-01-27 | 2004-11-03 | 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 |
| CN101444678B (en) * | 2008-12-02 | 2011-06-29 | 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 |
| CN104878832B (en) * | 2015-05-15 | 2017-08-29 | 武汉圣禹排水***有限公司 | Reverse downstream Hydro-automatic gate |
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2017
- 2017-02-28 CN CN201710111884.1A patent/CN106759138B/en not_active Expired - Fee Related
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| CN106759138A (en) | 2017-05-31 |
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