CN106958236A - A kind of power station ground power house tailrace outlet structure and its power station - Google Patents
A kind of power station ground power house tailrace outlet structure and its power station Download PDFInfo
- Publication number
- CN106958236A CN106958236A CN201710372266.2A CN201710372266A CN106958236A CN 106958236 A CN106958236 A CN 106958236A CN 201710372266 A CN201710372266 A CN 201710372266A CN 106958236 A CN106958236 A CN 106958236A
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- tail water
- pressure tank
- water pressure
- downstream
- draft tube
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention discloses a kind of power station ground power house tailrace outlet structure, including the draft tube being connected with water turbine set, the draft tube port of export is provided with tail water pressure tank, the tail water pressure tank is the pond of unlimited top, bottom and side-closed, the tail water in tail water pressure tank can be drained into the overfall in downstream by being provided with and tail water pressure tank is connected with draft tube, at the top of tail water pressure tank；The spillwag chute elevation of the overfall designs tailwater level less than the maximum flood control level in downstream higher than downstream.The technology of the present invention is feasible, simple in construction, reliable, it is adaptable to which tail water level amplitude is larger, the power station without making full use of tail water lowest water level.
Description
Technical field
The invention belongs to water conservancy and hydropower technology, and in particular to a kind of power station ground power house tailrace outlet structure and its water power
Stand.
Background technology
Draft tube of hydropower station is located at below rotary wheel of water turbine, is the important flow passage components of reaction turbine, it collects simultaneously
Guiding outlet of rotary wheel current are discharged into downstream, using the level head of outlet of rotary wheel to the level of tail water, reclaim the part of outlet of rotary wheel
Kinetic energy.Outlet of rotary wheel depends primarily on the Installation Elevation of the hydraulic turbine to the level head of the level of tail water.And Installation Elevation mainly by
Hydraulic turbine draught-height is controlled, and draught-height is smaller, and installation elevation of hydraulic turbine is lower.
Traditional ground power house tailrace outlet structural shape is that draft tube outlet is directly submerged in into downstream river design tail
Under water level, or by tailwater tunnel connect draft tube by tailrace outlet be submerged in downstream river design tailwater level under, its draft tube
Outlet water level elevation design tailwater level less than downstream, obtain less draught-height, improve outlet of rotary wheel vacuum, improve water
The cavitation erosion performance of turbine.
Using the power station of traditional tailrace outlet structural shape, the minimum tailwater level in downstream is lower, installation elevation of hydraulic turbine
It is lower.
In powerhouse of hydropower station design, installation elevation of hydraulic turbine is a controlling absolute altitude, only installation elevation of hydraulic turbine
It is determined that can just determine the elevation of corresponding generator floor elevation and assembly yard later, for applying mechanically ready-made unit, generator and
Spacing between the hydraulic turbine is given.
Power station ground type factory building under being acted on for high luffing flood level, downstream river maximum flood control level and downstream river
Range of stage is larger between flowing minimum tailwater level.If only for making full use of the minimum tailwater level of downstream river to generate electricity, using tradition
Tailrace outlet structural shape, installation elevation of hydraulic turbine typically sets relatively low, to meet draught-height requirement.Now, according to water
The maximum flood control level of assembly yard and generator floor floor elevation opposite downstream that turbine elevation is determined is relatively low, downstream draft tube deck and
The comparison that road downstream anti-flood wall of marching into the arena is accomplished by design is high, causes visual field landscape in field poor, construction investment, runtime row
Water rate is used and security risk is higher.In order to reduce anti-flood wall highly, assembly yard and generator floor high level are improved, it will cause
Factory building height increase, Industrial Plant investment increase, the extended length of hydrogenerator rotating shaft, unit operation less stable is drawn
The problems such as playing factory vibration.
Power station ground type factory building under being acted on for high luffing flood level, according to traditional tailrace outlet structural type
Formula, sets relatively low installation elevation of hydraulic turbine to utilize the minimum tailwater level of downstream river to generate electricity, can also cause the soil of ground power house
Build that engineering excavation amount is larger, when the maximum flood control level in downstream also brings along the stability against floating problem of factory building, cause fill concrete
The increase of quantities.If installation elevation of hydraulic turbine is improved, do not utilize the minimum tailwater level of downstream river to generate electricity, then not only result in
Head is wasted, and can also be reduced hydraulic turbine gas-to electricity hourage, be caused the larger water loss of energy.
The explanation of technical terms that the present invention is designed is as follows：
Design tailwater level：The hydraulic turbine wants the normal work need to ensure that draft tube has certain normal pressure, and water level, which needs to flood draft tube, to be gone out
Mouthful, this water level is just design tailwater level.Design tailwater level is higher than minimum tailwater level, and otherwise the hydraulic turbine just can not normal work
Make.That is, design tailwater level, which is minimum tailwater level, adds the corresponding water level of generating flow.
The content of the invention
Gone out to overcome in the regional power station ground power house development process in high luffing flood level river using traditional tail water
Defect and deficiency that mouth structure pattern is present, propose a kind of more advanced, practical, efficient tailrace outlet structure and its water power
Stand.
The technical scheme of the present invention that solves the problems, such as is：A kind of power station ground power house tailrace outlet structure, including with water wheels
The draft tube of unit connection, the draft tube port of export is provided with tail water pressure tank, and the tail water pressure tank is opened wide for top, bottom
With the pond of side-closed, and tail water pressure tank connects with draft tube, provided with can be by tail water pressure tank at the top of tail water pressure tank
Tail water drain into the overfall in downstream；
The spillwag chute elevation of the overfall designs tailwater level less than the maximum flood control level in downstream higher than downstream.
When unit generation, if downstream river water level is less than tail water pressure tank spillwag chute elevation, unit is quoted flow and passed through
The guiding of draft tube, from the spillwag chute of tail water pressure tank overflows and leaks into downstream river, now downstream generating water level is maintained
Tail water pressure tank spillwag chute elevation is constant.If upstream river generating constant level, unit working head is basically unchanged.
When unit generation, if downstream river water level is higher than tail water pressure tank spillwag chute elevation, tail water pressure tank can be regarded as
A part for downstream river, unit quotes guiding of the flow by draft tube, floods stream from tail water pressure tank, and now downstream is sent out
Electric water level is downstream river water level.If upstream river generating constant level, unit working head with downstream river water level change
Change and change.
By setting tail water pressure tank, downstream river generating range of stage is reduced, in upstream river generating constant level
In the case of, Hydropower Plant working head luffing can be reduced.
Further, downstream is washed away to reduce overflow water, down swims the slurry of extension to being equipped with overfall position
Stone-laying river bottom protection.
In a kind of specific scheme, the overfall is arranged to install at the downstream of tail water pressure tank, overfall and set
There is tail water overhauling gate.
In another specific scheme, the overfall is radially set around tail water pressure tank top sides edge.
Meanwhile, the present invention also provides a kind of power station, including water turbine set, the generator being connected with water turbine set, diversion
Pressure pipeline, littoral the first anti-flood wall set, draft tube deck, the second anti-flood wall for being arranged at draft tube deck downstream, first
Anti-flood wall is connected with the second anti-flood wall, and draft tube deck is provided with tail water emergency gate, also including above-mentioned power station ground power house
Tailrace outlet structure, the tail water emergency gate is located at draft tube and tail water pressure tank link position.
The present invention remarkable result be：
1. by setting tail water pressure tank, downstream electrical generation water position, reduces downstream river generating water level when raising hydroelectric station operation
Luffing, in the case of upstream river generating constant level, reduces Hydropower Plant working head luffing.Tail water pressure tank is also
Can effective Littoral Barrier, be conducive to unit operation stable.
2. due to being provided with pressure afterbay, installation elevation of hydraulic turbine is determined by tail water pressure tank spillwag chute elevation, can
It is corresponding to improve installation elevation of hydraulic turbine, and then generator elevation can be improved, erecting bed elevation is improved, can also reduce the first anti-flood wall
Height cancels the first anti-flood wall.
3. by raising installation elevation of hydraulic turbine, factory building foundation excavation line elevation can be improved, reduce the native stone of ground type factory building
Square excavated volume, reduces investment.Be conducive to improving the stability against floating of factory building, reduce the factory building foundation concrete amount of filling.
4. advantageously reducing factory building height, reduce factory building investment, reduce the length of hydrogenerator rotating shaft, improve unit factory
Room vibration problem.Tail water overhauling gate even can be cancelled, the power station for requiring setting tail water overhauling gate is advantageously reduced
The height of tail water overhauling gate.
Brief description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is power station profile of the present invention.
Fig. 2 power station floor plans of the present invention.
In figure：1. maximum flood control level, 2. spillwag chute elevations, 3. downstream river water levels, 4. design tailwater levels, 5. minimum tails
Water level, 6. tail water pressure tanks, 7. river bottom protection, 8. overfalls, 9. tail water overhauling gates, 10. second anti-flood walls, 11. tail water emergency locks
Door, 12. draft tubes, 13. water turbine set Installation Elevations, 14. generators, 15. draft tube decks, 16. generator elevations, 18. water wheels
Unit, 19. factory building foundation excavation lines, 20. diversion penstocks, 21. first anti-flood walls.
Embodiment
As shown in Fig. 1~2, a kind of power station ground power house tailrace outlet structure, including the tail being connected with water turbine set 18
Water pipe 12.
The port of export of draft tube 12 is provided with tail water pressure tank 6, and the tail water pressure tank 6 is unlimited top, bottom and side
The pond of face closure.And tail water pressure tank 6 is connected with draft tube 12.
The top of tail water pressure tank 6, which is provided with, can drain into the tail water in tail water pressure tank 6 overfall 8 in downstream.The overflow
Mouth 8, which is arranged to install at the downstream of tail water pressure tank 6, overfall 8, is provided with tail water overhauling gate 9.At the position of overfall 8
The stone masonry river bottom protection 7 of extension is down swum to being equipped with.
The spillwag chute elevation 2 of the overfall 8 designs tailwater level 4 less than the maximum flood control level 1 in downstream higher than downstream.
Also provide a kind of power station, including water turbine set 18, the generator 14 being connected with water turbine set 18, diversion pressure simultaneously
Hydraulic piping 20, littoral the first anti-flood wall 21 set, draft tube deck 15, the second anti-flood wall for being arranged at the downstream of draft tube deck 15
10, the first anti-flood wall 21 is connected with the second anti-flood wall 10, and draft tube deck 15 is provided with tail water emergency gate 11.
Also include above-mentioned power station ground power house tailrace outlet structure, the tail water emergency gate 11 be located at draft tube 12 with
At the link position of tail water pressure tank 6.
When building power station, the height of the elevation of draft tube deck 15 and the second anti-flood wall 10 is determined by maximum flood control level 1.Water
Power station ground type factory building assembly yard elevation should be with road factory building section elevation of marching into the arena with high, to facilitate vehicle directly to open into assembly yard.
The first anti-flood wall 21, the first anti-flood wall 21 and the second flood control on draft tube deck 15 are built in roadside downstream of marching into the arena
Wall 10 connects, it is ensured that flood period, external traffic was unobstructed.
Downstream river designs tailwater level 4 according to the corresponding downstream river of hydraulic turbine inflow-rate of water turbine in the case of power station installation number of units
Flowing water position is determined, higher than the minimum tailwater level 5 of downstream river.
If being not provided with tail water pressure tank 6, water turbine set Installation Elevation 13 designs tailwater level 4 by downstream river and determined, tail
Water pipe 12, which is exported, be directly submerged in downstream river design tailwater level below 4, meets draught-height requirement.
If setting pressure afterbay 6, installation elevation of hydraulic turbine 13 is determined by tail water pressure tank spillwag chute elevation 2, can phase
Installation elevation of hydraulic turbine 13 should be improved, and then generator elevation 16 can be improved, erecting bed elevation is improved, reduces the first anti-flood wall 10
Height cancels the first anti-flood wall 10.The elevation of factory building foundation excavation line 19 can be improved by raising installation elevation of hydraulic turbine 13, is subtracted
Small ground type factory building earthwork evacuation amount, reduces investment.Be conducive to improving the stability against floating of factory building, reduce factory building foundation concrete
The amount of filling.
Tail water emergency gate 11 is to ensure that tail water emergency gate can be in dynamic underwater cutting current.
Tail water pressure tank 6 should ensure that flow-shape is uniform, it is to avoid occur larger whirlpool when unit generation is run and anti-
To flow velocity.
Tail water pressure tank 6 can effective Littoral Barrier, electrical generation water position in downstream when raising hydroelectric station operation reduces unit working water
Head luffing, is conducive to unit operation stable.
When downstream river level 3 is less than tail water pressure tank spillwag chute elevation 2, the size of unit working head loss is
Both differences, proportion is smaller compared with unit working head, and tail water pressure tank spillwag chute elevation 2 can pass through economic technology
Compare determination.
When unit generation, if downstream river water level 3 is less than tail water pressure tank spillwag chute elevation 2, unit is quoted flow and led to
The guiding of draft tube 12 is crossed, from the spillwag chute of tail water pressure tank 6 overflows and leaks into downstream river, now downstream generating water level dimension
Hold constant in tail water pressure tank spillwag chute elevation 2.If upstream river generating constant level, unit working head is basically unchanged.
When unit generation, if downstream river water level is higher than tail water pressure tank spillwag chute elevation 2, tail water pressure tank 6 can be seen
Make a part for downstream river, unit quotes guiding of the flow by draft tube 12, floods stream from tail water pressure tank 6, now
Downstream generating water level is downstream river water level 3.If upstream river generating constant level, unit working head is with downstream river water
Position 3 change and change.
Claims (5)
1. a kind of power station ground power house tailrace outlet structure, including with water turbine set（18）The draft tube of connection（12）, it is special
Levy and be：The draft tube（12）The port of export is provided with tail water pressure tank（6）, the tail water pressure tank（6）For top open wide, bottom
With the pond of side-closed, and tail water pressure tank（6）With draft tube（12）Connection, tail water pressure tank（6）Top is provided with can be by tail
Water pressure pond（6）In tail water drain into the overfall in downstream（8）；
The overfall（8）Spillwag chute elevation（2）Less than the maximum flood control level in downstream（1）, tailwater level is designed higher than downstream
（4）.
2. ground power house tailrace outlet structure in power station according to claim 1, it is characterised in that：In overfall（8）Position
The stone masonry river bottom protection of extension is down swum to being equipped with the place of putting（7）.
3. ground power house tailrace outlet structure in power station according to claim 1, it is characterised in that：The overfall（8）
It is arranged at tail water pressure tank（6）Downstream, overfall（8）Place, which is installed, is provided with tail water overhauling gate（9）.
4. ground power house tailrace outlet structure in power station according to claim 1, it is characterised in that：The overfall（8）
Around tail water pressure tank（6）Top sides edge is radially set.
5. a kind of power station, including water turbine set（18）With water turbine set（18）The generator of connection（14）, diversion penstock
（20）, littoral the first anti-flood wall set（21）, draft tube deck（15）, be arranged at draft tube deck（15）Second flood control in downstream
Wall（10）, the first anti-flood wall（21）With the second anti-flood wall（10）It is connected, draft tube deck（15）It is provided with tail water emergency gate
（11）, it is characterised in that：Also include the power station ground power house tailrace outlet structure described in any one of the claims 1~4,
The tail water emergency gate（11）Positioned at draft tube（12）With tail water pressure tank（6）At link position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372266.2A CN106958236A (en) | 2017-05-24 | 2017-05-24 | A kind of power station ground power house tailrace outlet structure and its power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710372266.2A CN106958236A (en) | 2017-05-24 | 2017-05-24 | A kind of power station ground power house tailrace outlet structure and its power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106958236A true CN106958236A (en) | 2017-07-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710372266.2A Pending CN106958236A (en) | 2017-05-24 | 2017-05-24 | A kind of power station ground power house tailrace outlet structure and its power station |
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| Country | Link |
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| CN (1) | CN106958236A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403287A (en) * | 2018-11-22 | 2019-03-01 | 中国电建集团成都勘测设计研究院有限公司 | For the biggish workshop tail water arragement construction of level of tail water luffing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201843122U (en) * | 2010-06-08 | 2011-05-25 | 同济大学 | Tail water complementary energy processing device of hydroelectric power station |
| CN202323895U (en) * | 2011-11-18 | 2012-07-11 | 中国水电顾问集团成都勘测设计研究院 | Tail water channel structure for stepped hydro-junction |
| CN203546687U (en) * | 2013-11-14 | 2014-04-16 | 武汉大学 | Hydropower station tail water surge chamber capable of automatically adapting to changes in tail water level |
| CN204185835U (en) * | 2014-09-11 | 2015-03-04 | 武汉大学 | Power station free pressure flow tail water discharge |
| CN105155488A (en) * | 2015-07-03 | 2015-12-16 | 中国电建集团贵阳勘测设计研究院有限公司 | Arrangement mode and structure of small ecological flow unit of hydropower station underground powerhouse |
| CN206752427U (en) * | 2017-05-24 | 2017-12-15 | 中国电建集团中南勘测设计研究院有限公司 | A kind of power station ground power house tailrace outlet structure and its power station |
-
2017
- 2017-05-24 CN CN201710372266.2A patent/CN106958236A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201843122U (en) * | 2010-06-08 | 2011-05-25 | 同济大学 | Tail water complementary energy processing device of hydroelectric power station |
| CN202323895U (en) * | 2011-11-18 | 2012-07-11 | 中国水电顾问集团成都勘测设计研究院 | Tail water channel structure for stepped hydro-junction |
| CN203546687U (en) * | 2013-11-14 | 2014-04-16 | 武汉大学 | Hydropower station tail water surge chamber capable of automatically adapting to changes in tail water level |
| CN204185835U (en) * | 2014-09-11 | 2015-03-04 | 武汉大学 | Power station free pressure flow tail water discharge |
| CN105155488A (en) * | 2015-07-03 | 2015-12-16 | 中国电建集团贵阳勘测设计研究院有限公司 | Arrangement mode and structure of small ecological flow unit of hydropower station underground powerhouse |
| CN206752427U (en) * | 2017-05-24 | 2017-12-15 | 中国电建集团中南勘测设计研究院有限公司 | A kind of power station ground power house tailrace outlet structure and its power station |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403287A (en) * | 2018-11-22 | 2019-03-01 | 中国电建集团成都勘测设计研究院有限公司 | For the biggish workshop tail water arragement construction of level of tail water luffing |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20170718 |