CN105089025A - Sediment transport device - Google Patents
Sediment transport device Download PDFInfo
- Publication number
- CN105089025A CN105089025A CN201410215659.9A CN201410215659A CN105089025A CN 105089025 A CN105089025 A CN 105089025A CN 201410215659 A CN201410215659 A CN 201410215659A CN 105089025 A CN105089025 A CN 105089025A
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- China
- Prior art keywords
- sediment
- gallery
- sediment transport
- transport
- desilting tunnel
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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
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a sediment transport device and belongs to the field of hydraulic engineering. According to the sediment transport device, a sediment trap is arranged on the whole front edge of a water inlet of a power station. A sediment transport gallery is arranged in front of the sediment trap and connected with a dam foundation sediment discharge tunnel. A horizontal joint sediment discharge opening is arranged in the top of the sediment transport gallery. The width of the horizontal joint sediment discharge opening gradually becomes smaller from the upstream part. The cross section of the sediment transport gallery gradually becomes larger from the upstream part. The sediment trap is used in cooperation with the widening and joint-narrowing type sediment transport gallery to achieve the function of a sediment stopping groove, a long-strip-shaped erosion funnel can be formed in front of the sediment trap, and the sediment discharge effect of removing sediment in front of the water inlet of the power station is truly achieved.
Description
Technical field:
The present invention relates to a kind of intake of hydropower station and get rid of coarse sediment technology, particularly relate to the technology that the not wide narrow slit type flush gallery that broadens of a kind of employing carries out sand discharge, belong to hydraulic engineering field, IPC international Patent classificating number is E02B9/00, E02B9/04, E02B1/00.
Background technology:
On heavily silt-carrying river, sand erosion is very serious to the destruction that the hydraulic turbine causes.For high water head hinge, arranging bottom hole for sand flushing or flood and sand discharging hole is reduce the effective measures that rough sand crosses machine.Bottom hole for sand flushing is generally arranged in the bottom of powerplant intakes, utilizes flood discharge to form erosion funnel before powerplant intakes, reduces rough sand and crosses machine.For low water head river channel hinge, it is more difficult that bottom hole for sand flushing is arranged in powerplant intakes bottom, is arranged in powerplant intakes both sides, and erosion funnel scope is less, is difficult to reach desirable sand-flash effect.The type powerplant intakes leading edge is generally long in addition, and single sand discharge hole cannot realize its object at all, arranges multiple sand discharge hole be difficult to again arrange along water inlet leading edge.Gallery top on power station unit inducer base plate, eight Pan Xia power stations arranges wide gap sand discharge, and operation result shows, mouth door flow velocity is little, draws husky hole conveyance capacity little, draws husky scope little, and easily produce silting in gallery.
Summary of the invention:
It is difficult to arrange for low water head river channel hinge powerplant intakes desilting works, and is difficult to reach the problems such as desirable sand-flash effect, and inventor, through Theoretical Design and a large amount of hydraulic model tests, devises one and to broaden narrow slit type sediment transport device.Technical scheme of the present invention is as follows:
A kind of sediment transport device, comprise sediment trapping bank, gallery for sediment transport and dam foundation desilting tunnel, described dam foundation desilting tunnel is located at the right side of powerplant intakes, and described dam foundation desilting tunnel is provided with desilting tunnel access door and desilting tunnel service gate; Described sediment trapping bank is located at the leading edge of powerplant intakes, described gallery for sediment transport is arranged on before described sediment trapping bank, described gallery for sediment transport is connected with described dam foundation desilting tunnel, horizontal joint sediment ejection opening is provided with at described gallery for sediment transport top, the width of described horizontal joint sediment ejection opening narrows gradually from upstream, and the cross section of described gallery for sediment transport increases gradually from upstream.
Sediment transport device of the present invention, adopt first and to broaden narrow slit type gallery for sediment transport, and with sediment trapping bank with the use of, serve the effect cutting husky groove, the erosion funnel of a strip can be formed, the sand-flash effect of " clear in front of the door " before really reaching powerplant intakes before sediment trapping bank.
Accompanying drawing illustrates:
The layout plan of Fig. 1, sand discharge apparatus of the present invention
The skiagraph of the narrow slit type flush gallery that broadens that Fig. 2, the present invention adopt
The A-A profile of the narrow slit type flush gallery that broadens that Fig. 3, the present invention adopt
The B-B profile of the narrow slit type flush gallery that broadens that Fig. 4, the present invention adopt
In figure, 1 is powerplant intakes, and 2 is sediment trapping bank, 3 galleries for sediment transport, and 4 is horizontal joint sediment ejection opening, and 5 is dam foundation desilting tunnel, 6, desilting tunnel access door, and 7 is desilting tunnel service gate.
Detailed description of the invention:
Below in conjunction with embodiment and accompanying drawing 1-3, the invention will be further described:
A kind of sediment transport device, comprise sediment trapping bank 2, gallery for sediment transport 3 and dam foundation desilting tunnel 5, described dam foundation desilting tunnel 5 is located at the right side of powerplant intakes 1, and described dam foundation desilting tunnel 5 is provided with desilting tunnel access door 6 and desilting tunnel service gate 7; Described sediment trapping bank 2 is located at the leading edge of powerplant intakes 1, described gallery for sediment transport 3 is arranged on before described sediment trapping bank 2, described gallery for sediment transport 3 is connected with described dam foundation desilting tunnel 5, horizontal joint sediment ejection opening 4 is provided with at described gallery for sediment transport 3 top, the width of described horizontal joint sediment ejection opening 4 narrows gradually from upstream, and the cross section of described gallery for sediment transport 3 increases gradually from upstream.
Sediment trapping bank 2 and gallery for sediment transport 3 should be arranged in the flat slope section of powerplant intakes as far as possible, the end of preferred flat slope section, and flow condition herein, is conducive to the alluvial of coarse sediment, are also conducive to the sand surfing of horizontal joint sediment ejection opening.Due to the horizontal joint sediment ejection opening 4 at gallery for sediment transport 3 top, banded water outlet flow forms the eddy current of structure disturbance in flush gallery, greatly strengthen the sediment carrying capacity of current, make alluvial at the silt rapid deflation of flush gallery and perimeter zone, thus form the erosion funnel of a strip at powerplant intakes forward position sediment trapping bank, to guarantee that silt cannot enter unit runner.Wherein, the size of gallery for sediment transport 3 and horizontal joint sediment ejection opening 4 can in conjunction with power station total size, and the incoming water and sediment in river, is determined by conventional design, calculating means.
The method of operation of sediment transport device of the present invention: non-flood period and power station error-free running period, described desilting tunnel service gate 7 is in closed condition, when silt height before described sediment trapping bank 2 is close to sediment trapping bank 2 height, open described desilting tunnel service gate 7, carry out sand discharge, when formed before described sediment trapping bank 2 complete draw hourglass bucket time, close described desilting tunnel service gate 7; When flood in flood season, described desilting tunnel service gate 7 is held open, and reduces rough sand and enters unit runner.
In the present invention, the upstream of described gallery for sediment transport 3 and horizontal joint sediment ejection opening 4, refers to the left side of powerplant intakes 1; The downstream of gallery for sediment transport 3 and horizontal joint sediment ejection opening 4, refers to the right side of powerplant intakes 1.
The invention solves low water head river channel hinge sand discharge building difficult arrangement, layout is conveniently difficult to reach the problems such as desirable sand-flash effect, and principle is simple, water consumption is little, practical, river channel hinge power station is built in the river compared with high concentration of sediment to having in river course water there is higher practical value.
Claims (1)
1. a sediment transport device, comprise sediment trapping bank, gallery for sediment transport and dam foundation desilting tunnel, it is characterized in that, described dam foundation desilting tunnel is located at the right side of powerplant intakes, and described dam foundation desilting tunnel is provided with desilting tunnel access door and desilting tunnel service gate; Described sediment trapping bank is located at the leading edge of powerplant intakes, described gallery for sediment transport is arranged on before described sediment trapping bank, described gallery for sediment transport is connected with described dam foundation desilting tunnel, horizontal joint sediment ejection opening is provided with at described gallery for sediment transport top, the width of described horizontal joint sediment ejection opening narrows gradually from upstream, and the cross section of described gallery for sediment transport increases gradually from upstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410215659.9A CN105089025A (en) | 2014-05-21 | 2014-05-21 | Sediment transport device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410215659.9A CN105089025A (en) | 2014-05-21 | 2014-05-21 | Sediment transport device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105089025A true CN105089025A (en) | 2015-11-25 |
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ID=54570285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410215659.9A Pending CN105089025A (en) | 2014-05-21 | 2014-05-21 | Sediment transport device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105089025A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258471A (en) * | 2019-06-05 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Riverbed water intaking mouth structure for the water intaking of power station forward direction |
-
2014
- 2014-05-21 CN CN201410215659.9A patent/CN105089025A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110258471A (en) * | 2019-06-05 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Riverbed water intaking mouth structure for the water intaking of power station forward direction |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151125 |
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| WD01 | Invention patent application deemed withdrawn after publication |