CN204185835U - Power station free pressure flow tail water discharge - Google Patents
Power station free pressure flow tail water discharge Download PDFInfo
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- CN204185835U CN204185835U CN201420521757.0U CN201420521757U CN204185835U CN 204185835 U CN204185835 U CN 204185835U CN 201420521757 U CN201420521757 U CN 201420521757U CN 204185835 U CN204185835 U CN 204185835U
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- 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
Abstract
The utility model provides a kind of power station free pressure flow tail water discharge, and being connected successively by draft tube, linkage section, free pressure flow tailrace tunnel is formed; Or be connected successively by draft tube, linkage section, downstream surge-chamber, free pressure flow tailrace tunnel.The utility model power station free pressure flow tail water discharge is that the minimum absolute pressure of a kind of draft tube admission section more easily meets code requirement and can avoid the hydropower station tail water system of the too low unit tonifying Qi difficulty caused of machine kludge elevation.
Description
Technical field
The utility model belongs to hydraulic power project technical field, is specifically related to a kind of power station free pressure flow tail water discharge.
Background technology
Along with the exploitation of Southwestern China waterpower resourses, residing for many huge, large hydropower stations planned, design and construct, section landform is steep, river valley is narrow, riverbed only can be used for arranging dash and flood releasing structure, and water delivery power generation construction thing, water conservancy diversion and part flood releasing structure must be arranged in the massif of two sides, this is comparatively typical a kind of hinge general arrangement general layout.
When hydropower station tail water system is longer, downstream surge-chamber generally need be set to meet the requirement that the minimum absolute pressure of draft tube of hydropower station admission section meets specification and design.And often due to the restriction of landform, geological conditions in engineering reality, the surge-chamber that allocation scale is larger can not be met; In addition, in order to the requirement making the minimum absolute pressure of draft tube admission section meet specification and design, the Installation Elevation of unit need be reduced, but too low Installation Elevation brings certain difficulty will to the tonifying Qi of unit.
When underground power station employing stem formula and middle part formula development scheme, for reducing the engineering quantity of tailrace outlet side slope and tailwater tunnel, avoid excavation supporting and the stable problem of artificial high gradient slope, alleviate the destroying infection to surface vegetation and environment, often need to consider " forever facing combination ", namely make full use of the temporary building of construction period, combine with permanent building, carry out unified layout and design, hydropower station tail water hole is combined with Diversion Tunnel, just may become a kind of arrangement advantageously.
Utility model content
For the deficiency that prior art exists, the utility model provides the minimum absolute pressure of a kind of draft tube admission section and more easily meets code requirement and the power station free pressure flow tail water discharge can avoiding the too low unit tonifying Qi difficulty caused of machine kludge elevation.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
The first power station free pressure flow tail water discharge, comprises draft tube, linkage section and free pressure flow tailrace tunnel, and draft tube, linkage section, free pressure flow tailrace tunnel are connected successively.
As preferably, when for multimachine one hole tail water discharge, draft tube exit arranges unit maintenance gate and unit maintenance gate shaft.If during a machine one hole tail water discharge, based on economic principle, determine whether unit maintenance gate and unit maintenance gate shaft are set in draft tube exit.
As preferably, slope, free pressure flow tailrace tunnel top is the adverse slope that the gradient is not less than 3%, and its base slope is in easy flights in the adverse slope of slope, the top gradient.
As preferably, vertical section parabolically type or the linear pattern on top, linkage section hole.
The first power station free pressure flow tail water discharge is adopted when tail water discharge length is 150m ~ 600m, wherein free pressure flow tailrace tunnel can guarantee that the minimum absolute pressure of draft tube admission section meets the requirement of specification and design, the downstream surge-chamber avoiding allocation scale huge, simplify the layout of underground hole group, reduce the scale of cavity group.
The second power station free pressure flow tail water discharge, comprises draft tube, linkage section, downstream surge-chamber and free pressure flow tailrace tunnel, and draft tube, linkage section, downstream surge-chamber, free pressure flow tailrace tunnel are connected successively.
As preferably, the oblique Duan Ding slope of free pressure flow tailrace tunnel is the adverse slope that the gradient is not less than 3%, and its base slope is in easy flights in the adverse slope of slope, the top gradient.
As a kind of detailed description of the invention, free pressure flow tailrace tunnel comprises non-tail leads and leads in conjunction with hole section in conjunction with hole section, free pressure flow tailrace tunnel linkage section and tail, non-tail is led to lead with tail in conjunction with the outlet of hole section and is connected by free pressure flow tailrace tunnel linkage section in conjunction with hole section entrance, downstream surge-chamber connects non-tail and leads in conjunction with hole section entrance, and tail is led and connected tailrace outlet and tailwater channel in conjunction with the outlet of hole section.
As preferably, it is adit that tail is led in conjunction with hole section.
As preferably, it is the adverse slope that the gradient is not less than 3% that non-tail is led in conjunction with hole Duan Dingpo, and its base slope is in easy flights in the adverse slope of slope, the top gradient.
As preferably, tail is led and is provided with air vent in conjunction with hole section.
The second power station free pressure flow tail water discharge is adopted when tail water discharge length is greater than 600m or when hydropower station tail water hole is combined arranges with Diversion Tunnel, namely the minimum absolute pressure of draft tube admission section meets specification and designing requirement to adopt free pressure flow tailrace tunnel to assist downstream surge-chamber to guarantee, avoid excessively reducing installation elevation of hydraulic turbine, be conducive to tonifying Qi in unit operation, and reduce the excessive risk causing the machine of lifting of reverse surge pressure, also can reduce the design internal water pressure value of upstream pressure pipeline simultaneously.
When be applied to hydropower station tail water hole to be combined with Diversion Tunnel arrange time, tail leads the functional requirement that need take into account hydropower station tail water hole and Diversion Tunnel in conjunction with hole segment structure, makes tailrace tunnel and Diversion Tunnel can play respective function and efficacy better.
The duty of free pressure flow tailrace tunnel is different from conventional having and presses tailrace tunnel and tailrace tunnel with no pressure, presents the streamflow regime of free flow, free pressure flow or flowing full when the different level of tail water in free pressure flow tailrace tunnel.The utility model power station free pressure flow tail water discharge can solve the problem that the minimum absolute pressure of draft tube of hydropower station admission section can not meet code requirement, and can avoid due to machine kludge elevation too low time cause unit tonifying Qi difficulty.
When tailrace tunnel and draft tube total length are 150m ~ 600m, the first power station free pressure flow tail water discharge can be adopted, namely adopt separately free pressure flow tailrace tunnel to solve the problem.The downstream surge-chamber avoiding allocation scale huge, reduces quantity and the scale of underground power station cavity group, is conducive to the layout of underground power station cavity group and stablizes, saving construction investment; And because head loss is little, long-term Utility of Energy can be obtained.When downstream tailwater level luffing is larger, free pressure flow tailrace tunnel advantage is more obvious compared with the surge-chamber scheme of downstream, comparatively large on the height impact of downstream surge-chamber when namely tailwater level luffing is larger, and little to the size impact of free pressure flow tailrace tunnel.
When tailrace tunnel and draft tube length are greater than 600m, the second power station free pressure flow tail water discharge can be adopted, namely adopt the combined layout pattern of downstream surge-chamber and free pressure flow tailrace tunnel, avoid the unit tonifying Qi difficulty caused because machine kludge elevation is too low.This combined layout pattern is particularly useful for hydropower station tail water hole and is combined the situation of arranging with Diversion Tunnel, the temporary building of construction period can be made full use of, combine with permanent building, carry out unified layout and design, reduce the engineering quantity of tailrace outlet side slope and tailwater tunnel, avoid excavation supporting and the stable problem of artificial high gradient slope, save construction investment, alleviate the destroying infection to surface vegetation and environment.
Accompanying drawing explanation
Fig. 1 for be applied to tail water discharge length shorter time free pressure flow tail water discharge vertical section schematic diagram;
Fig. 2 for be applied to tail water discharge length longer time free pressure flow tail water discharge vertical section schematic diagram;
Fig. 3 for be applied to tail lead in conjunction with time free pressure flow tail water discharge vertical section schematic diagram;
Fig. 4 is the free pressure flow tail water discharge vertical section schematic diagram of later-stage utilization Diversion Tunnel as tailrace tunnel.
Wherein, 1-underground power house, 2-main transformer hole, 3-downstream surge-chamber, 4-draft tube admission section, 5-draft tube, 6-linkage section, the oblique section of 7-free pressure flow tailrace tunnel, 8-free pressure flow tailrace tunnel linkage section, the 9-free pressure flow tailrace tunnel section of putting down, 9 '-free pressure flow tailrace tunnel is along slope section, 10-tailrace outlet, 11-downstream low water stage, 12-downstream middle water level, 13-downstream high water level, 14-free pressure flow interface, 15-has pressure flowing full section, 16-free flow section with no pressure, 17-air vent, 18-unit maintenance gate shaft.
Detailed description of the invention
Technical solutions of the utility model are further illustrated below in conjunction with accompanying drawing.
(1) free pressure flow tail water discharge when tail water discharge length is 150m ~ 600m is applied to
When free pressure flow tail water discharge length is 150m ~ 600m, free pressure flow tailrace tunnel can be adopted separately to guarantee that the minimum absolute pressure of draft tube import (or vacuum) meets specification and designing requirement, and in this case, free pressure flow tailrace tunnel vertical profile meets personally Fig. 1.Tail water discharge in this situation comprises draft tube (5), linkage section (6) and free pressure flow tailrace tunnel, and draft tube (5) is communicated with free pressure flow tailrace tunnel by linkage section (6).If during multimachine one hole tail water discharge, unit maintenance gate shaft (18) need be established in draft tube (5) exit, during to meet a unit maintenance, does not affect the normal operation of other unit of same Hydraulic unit; If during a machine one hole tail water discharge, based on economic principle, determine whether unit maintenance gate and unit maintenance gate shaft are set in draft tube exit, time of runner water-pumping/draining and the water yield during to shorten unit maintenance.This is concrete implements, the oblique section of free pressure flow tailrace tunnel (7) in free pressure flow tailrace tunnel and Fig. 1.
In this situation, the operating principle of tail water discharge is: when the level of tail water is in downstream low water stage (11), the hydraulic turbine depth of the water submerging be arranged in main building is less, free pressure flow interface (14) exports closer to draft tube (5), now free flow section (16) with no pressure is longer, there is pressure flowing full section (15) shorter, the negative water hammer experiment that the turbine-generator units be arranged in main building abandons load generation is little, and the minimum absolute pressure of draft tube admission section (4) can not exceed code requirement.Along with the level of tail water raises, by downstream low water stage (11) to downstream middle water level (12) again to downstream high water level (13), in the process that water level raises gradually, although free flow section (16) length with no pressure shortens gradually, pressure flowing full section (15) length is had to increase gradually, until free pressure flow tailrace tunnel full hole section becomes pressure flowing full section, the negative water hammer experiment that unit abandons load generation is increasing, but the depth of the water submerging of the hydraulic turbine strengthens gradually, and have pressure flowing full section mean flow rate also to reduce gradually, the effect of positive and negative two aspects is cancelled out each other, the minimum absolute pressure of draft tube admission section (4) still can be controlled within the allowed band of specification, ensure unit safety operation.
(2) free pressure flow tail water discharge when tail water discharge length is greater than 600m is applied to
When tail water discharge length is greater than 600m, adopts free pressure flow tailrace tunnel to assist downstream surge-chamber (3), guarantee that draft tube admission section (4) minimum absolute pressure (or vacuum) meets specification and designing requirement.Fig. 2 is shown in by downstream surge-chamber (3) and free pressure flow tailrace tunnel combined layout schematic diagram.Tail water discharge in this situation comprises draft tube (5), linkage section (6), downstream surge-chamber (3) and free pressure flow tailrace tunnel, and draft tube (5) is communicated with downstream surge-chamber (3) by linkage section (6), and downstream surge-chamber (3) is communicated with free pressure flow tailrace tunnel.This is concrete implements, the oblique section of free pressure flow tailrace tunnel (7) in free pressure flow tailrace tunnel and Fig. 2.
In this situation, the operating principle of tail water discharge is: when the level of tail water is in downstream low water stage (11), the depth of the water submerging of the hydraulic turbine is smaller, free pressure flow interface (14) is closer to downstream surge-chamber (3), now free flow section (16) with no pressure is longer, there is pressure flowing full section (15) shorter, the negative water hammer experiment that unit abandons load generation is little, the minimum absolute pressure of draft tube admission section (4) easily meets code requirement, now, the arrangement being connected to pressure tailrace tunnel with downstream surge-chamber is compared, installation elevation of hydraulic turbine is higher, effectively can reduce the difficulty of tonifying Qi during unit operation like this.Along with the level of tail water raises, by downstream low water stage (11) to downstream middle water level (12) again to downstream high water level (13), in the process that water level raises gradually, although free flow section (16) length with no pressure shortens gradually, pressure flowing full section (15) length is had to increase gradually, until free pressure flow tailrace tunnel full hole section becomes pressure flowing full section, the negative water hammer experiment that unit abandons load generation is increasing, but the depth of the water submerging of the hydraulic turbine strengthens gradually, the effect of positive and negative two aspects is cancelled out each other, in addition downstream surge-chamber (3) regulating action in load variations transient process, the minimum absolute pressure of draft tube admission section (4) still can be controlled within the allowed band of specification, ensure unit safety operation.
In concrete engineering design, need by the computational analysis of hydraulic transient, carry out the length that choose reasonable has pressure flowing full section and free flow section with no pressure, guarantee that regulating guarantee parameter all can meet the requirement of specification and design under various operating mode.
(3) be applied to tail lead in conjunction with time free pressure flow tail water discharge
When free pressure flow tail water discharge be applied to hydropower station tail water hole and Diversion Tunnel in conjunction with time, select flat slope pattern in conjunction with hole section in this free pressure flow tailrace tunnel, to take into account and to adapt to the functional requirement of hydropower station tail water hole and Diversion Tunnel, see Fig. 3.In this situation, free pressure flow tailrace tunnel comprises the oblique section of free pressure flow tailrace tunnel (7), free pressure flow tailrace tunnel linkage section (8) and the free pressure flow tailrace tunnel section of putting down (9), the oblique section of free pressure flow tailrace tunnel (7) outlet is connected by free pressure flow tailrace tunnel linkage section (8) with the free pressure flow tailrace tunnel section of putting down (9) entrance, downstream surge-chamber (3) connects free pressure flow tailrace tunnel oblique section (7) entrance, and the free pressure flow tailrace tunnel section of putting down (9) outlet connects tailrace outlet and tailwater channel.
If later-stage utilization Diversion Tunnel meets hydropower station expansion requirement as hydropower station tail water hole, leading in conjunction with hole section (namely free pressure flow tailrace tunnel is along slope section (9 ')) due to now tail is low-anglely go out stream along slope along hole axis direction, for avoiding in air trapping hole, to unit operation, stable and tunnel lining has a negative impact, can at free pressure flow tailrace tunnel along slope section (9 ') being set up air vent (17), see Fig. 4, gas in hole is discharged outside hole, or produces excessive negative pressure to tonifying Qi in hole to avoid local by air vent (17).
Free pressure flow tailrace tunnel sectional form and size set according to actual conditions, the service requirement of hydropower station tail water hole and Diversion Tunnel need be met, namely non-tail leads the requirement that will meet hydropower station tail water hole in conjunction with hole section (i.e. the oblique section of free pressure flow tailrace tunnel (7)), and tail leads the requirement that need take into account tailrace tunnel and Diversion Tunnel in conjunction with hole section (i.e. the free pressure flow tailrace tunnel section of putting down (9)).
The utility model realizes based on following measures:
(1) pattern of Hydraulic unit
Free pressure flow tailrace tunnel in tail water discharge both can adopt a machine one hole pattern, also can adopt multimachine one hole pattern, need carry out technology, the Integrated comparative of economic dispatch aspect determines according to actual conditions.
(2) free pressure flow tailrace tunnel layout in tail water discharge
Free pressure flow tailrace tunnel layout hole axis should be short as far as possible and straight, to shorten free pressure flow tailrace tunnel length, reduces negative water hammer experiment.Meanwhile, the radius of curvature of free pressure flow tailrace tunnel plane turning should be increased as far as possible, in order to avoid worsen flow-shape.
(3) vertical section being applied to tail water discharge when tail water discharge length is 150m ~ 600m is arranged
When tail water discharge length is shorter, tail water discharge is made up of draft tube (5) and free pressure flow tailrace tunnel, and the vertical section of tail water discharge is arranged and seen Fig. 1.
The design of this situation tail water discharge need meet the following conditions:
1. when the level of tail water is positioned at downstream low water stage (11), free pressure flow interface (14) is as far as possible near draft tube (5) outlet, and free flow section (16) length with no pressure is long as far as possible in free pressure flow tailrace tunnel, there is pressure flowing full section (15) length short as far as possible like this, be beneficial to regulating guarantee parameter and meet specification and designing requirement;
2. slope, free pressure flow tailrace tunnel top is preferably the adverse slope that the gradient is not less than 3%, when making tailwater level increase, the advantageous effect that the hydraulic turbine floods intensification can offset the detrimental effect of pressing flowing full section (15) to increase all the time, guarantee that draft tube (5) admission section (4) minimum absolute pressure meets code requirement, and be conducive to the discharge of unsteady flow " bubble ";
3. free pressure flow tailrace tunnel base slope is in easy flights in slope, the top gradient, otherwise has pressure flowing full section (15) mean flow rate to increase gradually, is unfavorable for that regulation assurance calculation meets code requirement;
4. according to tailrace outlet during minimum tailwater level (10) section Peak Flow Rate (being usually less than 4.0m/s), and the rock pier thickness between adjacent free pressure flow tailrace tunnel, determine tailrace outlet (10) floor elevation and width;
5. the discrepancy in elevation between free pressure flow tailrace tunnel admission section with draft tube (5) Outlet Section is connected by linkage section (6), top, linkage section (6) hole buttock line is parabola or straight line, to ensure to be always pressure flow in draft tube (5), avoid having an impact to unit operation efficiency.
6. when free pressure flow tailrace tunnel is longer, unit maintenance gate (18) can be set near draft tube (5) outlet, runner emptying time of drawing water and reduce pump-out during to shorten unit maintenance.
(4) the tail water discharge vertical section of downstream surge-chamber and free pressure flow tailrace tunnel combined layout is adopted to arrange
See Fig. 2 ~ 4, in the tail water discharge of downstream surge-chamber and free pressure flow tailrace tunnel combined layout, draft tube (5) is communicated with downstream surge-chamber (3) by linkage section (6), and downstream surge-chamber (3) is communicated with free pressure flow tailrace tunnel.The design of this situation tail water discharge need meet the following conditions:
1. according to underground power house (1), the requirement such as thickness between main transformer hole (2) and downstream surge-chamber (3) three large caverns hole, the position of downstream surge-chamber (3) relative to underground power house (1) is tentatively determined;
2. the designing requirement of free pressure flow tailrace tunnel is with the free pressure flow tailrace tunnel described in (3), but has difference: when the level of tail water is positioned at downstream low water stage (11), free pressure flow interface (14) should try one's best close downstream surge-chamber (3);
3. when tailrace tunnel to be combined with Diversion Tunnel arrange time, tail is led and is arranged in conjunction with the preferred adit of hole section, the free pressure flow tailrace tunnel section of putting down (9) namely in Fig. 3, with take into account and adapt to hydropower station tail water hole and Diversion Tunnel go out to flow requirement, the function and efficacy that normal performance is respective; The oblique section of free pressure flow tailrace tunnel (7) Outlet Section after downstream surge-chamber (3) and the difference of the free pressure flow tailrace tunnel section of putting down (9) inlet section size connect by free pressure flow tailrace tunnel linkage section (8) is suitable;
If 4. later-stage utilization Diversion Tunnel is as hydropower station tail water hole, be generally go out stream along slope along hole axis direction due to Diversion Tunnel, see that in Fig. 4, free pressure flow tailrace tunnel is along slope section (9 '), then be necessary at free pressure flow tail water along slope section (9 ') being arranged air vent (17), avoid in air trapping hole, to unit operation, stable and tunnel lining has a negative impact, and also can play tonifying Qi effect in unsteady flow process, produce excessive negative pressure to avoid local in hole.Air vent (17) can be communicated with surge-chamber or other building nearby, or establishes special hole to outside massif.
5. the floor elevation of the free pressure flow tailrace tunnel section of putting down (9)
When the level of tail water is positioned at downstream low water stage (11), in free flow state in the free pressure flow tailrace tunnel section of putting down (9) hole, by (requiring Froude number Fr<1 to the calculating of flow velocity in hole and Froude number and differentiation, for unhurried current), and through Calculations of Hydraulic Transient computational analysis, obtain the rational free pressure flow tailrace tunnel section of putting down (9) floor elevation, avoid the phenomenon occurring water flow shutoff in hole, and when being connected with downstream tail water, there is the current phenomenon of the instability such as hydraulic jump or water fall, jeopardize the stable operation of unit.
6. the gradient of the oblique section of free pressure flow tailrace tunnel (7)
The oblique section of free pressure flow tailrace tunnel (7) is not less than the adverse slope of 3% for the gradient, when making tailwater level increase, the advantageous effect that the hydraulic turbine floods intensification can offset the detrimental effect that flowing full section increases all the time, and the effect of downstream surge-chamber in addition, guarantees that the minimum absolute pressure of draft tube admission section meets code requirement.
(5) free pressure flow tailrace tunnel cross section
Free pressure flow tailrace tunnel cross section adopts gateway opening type usually, also can adopt circular cross section or u-shaped cross-section according to geological conditions.Its sectional form and size need meet the service requirement of hydropower station tail water hole and Diversion Tunnel, and namely non-binding hole section meets the requirement in hydropower station tail water hole, and tail leads the requirement that need to take into account both in conjunction with hole section.
(6) free pressure flow tail water discharge the Hydraulic Design
Comprise in the water-carriage system of downstream surge-chamber and free pressure flow tailrace tunnel, because free pressure flow tailrace tunnel unsteady flow hydraulic characteristic(s) presents different fluidised forms with tailwater level change, comprise unsteady flow in open, bright full mixed flow and pressure conduit unsteady flow, make the fluidised form in Calculations of Hydraulic Transient and fluctuation superposition very complicated, Transient Process of Hydropower Station computational analysis need through in whole design process, need constantly adjust and optimize layout and the Dam Configuration Design of water-carriage system according to transient process calculation achievement, to meet the requirement of power station regulating guarantee design, need if desired to be verified by model testing and optimize.The Hydraulic Design of free pressure flow tail water discharge is generally included in Water Hammer design process, can carry out computational analysis and research, do not repeat at this according to actual engineering design situation.
Claims (10)
1. power station free pressure flow tail water discharge, is characterized in that, comprising:
Draft tube, linkage section and free pressure flow tailrace tunnel, draft tube, linkage section, free pressure flow tailrace tunnel are communicated with successively.
2. power station as claimed in claim 1 free pressure flow tail water discharge, is characterized in that:
Described draft tube exit is provided with Emergency Gate well.
3. power station as claimed in claim 1 free pressure flow tail water discharge, is characterized in that:
Described slope, free pressure flow tailrace tunnel top is the adverse slope that the gradient is not less than 3%, and its base slope is in easy flights in the adverse slope of slope, the top gradient.
4. power station as claimed in claim 3 free pressure flow tail water discharge, is characterized in that:
The buttock line on described top, linkage section hole is parabola or straight line.
5. power station free pressure flow tail water discharge, is characterized in that, comprising:
Comprise draft tube, linkage section, downstream surge-chamber and free pressure flow tailrace tunnel, draft tube, linkage section, downstream surge-chamber, free pressure flow tailrace tunnel are communicated with successively.
6. power station as claimed in claim 5 free pressure flow tail water discharge, is characterized in that:
The oblique Duan Ding slope of described free pressure flow tailrace tunnel is the adverse slope that the gradient is not less than 3%, and its base slope is in easy flights in the adverse slope of slope, the top gradient.
7. power station as claimed in claim 5 free pressure flow tail water discharge, is characterized in that:
Described free pressure flow tailrace tunnel comprises non-tail leads and leads in conjunction with hole section in conjunction with hole section, free pressure flow tailrace tunnel linkage section and tail, non-tail is led to lead with tail in conjunction with the outlet of hole section and is connected by free pressure flow tailrace tunnel linkage section in conjunction with hole section entrance, downstream surge-chamber connects non-tail and leads in conjunction with hole section entrance, and tail is led and connected tailrace outlet and tailwater channel in conjunction with the outlet of hole section.
8. power station as claimed in claim 7 free pressure flow tail water discharge, is characterized in that:
It is adit that described tail is led in conjunction with hole section.
9. power station as claimed in claim 7 free pressure flow tail water discharge, is characterized in that:
It is the adverse slope that the gradient is not less than 3% that described non-tail is led in conjunction with hole Duan Dingpo, and its base slope is in easy flights in the adverse slope of slope, the top gradient.
10. power station as claimed in claim 7 free pressure flow tail water discharge, is characterized in that:
Described tail is led and is provided with air vent in conjunction with hole section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420521757.0U CN204185835U (en) | 2014-09-11 | 2014-09-11 | Power station free pressure flow tail water discharge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420521757.0U CN204185835U (en) | 2014-09-11 | 2014-09-11 | Power station free pressure flow tail water discharge |
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| CN204185835U true CN204185835U (en) | 2015-03-04 |
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| CN201420521757.0U Expired - Fee Related CN204185835U (en) | 2014-09-11 | 2014-09-11 | Power station free pressure flow tail water discharge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179159A (en) * | 2014-09-11 | 2014-12-03 | 武汉大学 | Hydropower station free-surface-pressurized flow tail water system |
| CN106958236A (en) * | 2017-05-24 | 2017-07-18 | 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 |
| CN109385988A (en) * | 2018-11-22 | 2019-02-26 | 中国电建集团成都勘测设计研究院有限公司 | For high water head, big flow, short diversion and power workshop tailrace tunnel discharge structure |
| CN114635398A (en) * | 2022-04-01 | 2022-06-17 | 长江勘测规划设计研究有限责任公司 | Section-in-section control rear-section pressure reduction system of ultra-long pressure tunnel and water filling and draining control method |
-
2014
- 2014-09-11 CN CN201420521757.0U patent/CN204185835U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179159A (en) * | 2014-09-11 | 2014-12-03 | 武汉大学 | Hydropower station free-surface-pressurized flow tail water system |
| CN106958236A (en) * | 2017-05-24 | 2017-07-18 | 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 |
| CN109385988A (en) * | 2018-11-22 | 2019-02-26 | 中国电建集团成都勘测设计研究院有限公司 | For high water head, big flow, short diversion and power workshop tailrace tunnel discharge structure |
| CN114635398A (en) * | 2022-04-01 | 2022-06-17 | 长江勘测规划设计研究有限责任公司 | Section-in-section control rear-section pressure reduction system of ultra-long pressure tunnel and water filling and draining control method |
| CN114635398B (en) * | 2022-04-01 | 2023-05-26 | 长江勘测规划设计研究有限责任公司 | Pressure reducing system for controlling rear section in section of ultra-long pressure tunnel and water filling and draining control method |
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