CN103882838A - Sediment releasing method for water intake of low-head river channel pivotal power station - Google Patents
Sediment releasing method for water intake of low-head river channel pivotal power station Download PDFInfo
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- CN103882838A CN103882838A CN201410076712.1A CN201410076712A CN103882838A CN 103882838 A CN103882838 A CN 103882838A CN 201410076712 A CN201410076712 A CN 201410076712A CN 103882838 A CN103882838 A CN 103882838A
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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
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Abstract
The invention relates to a sediment releasing method for a water intake of a low-head river channel pivotal power station and belongs to the field of water conservancy projects, under the IPC numbers of E02B9/00, E02B9/04 and E02B1/00. According to the method, a sediment trap is arranged along the whole front edge of the power station water intake, a gallery for sediment transport is arranged in front of the sediment trap and connected with a dam base sediment tunnel, the top of the gallery for sediment transport is provided with a horizontal joint sediment outlet, the width of the horizontal joint sediment outlet gradually increases from the upstream, the cross section of the gallery for sediment transport gradually increases from the upstream. The sediment trap is used with the variable width joint type gallery for sediment transport so as to achieve the function of an intercepting channel, an elongated scour funnel can be formed in front of the sediment trap, and the sediment releasing effect that sediment is released in front of the power station water intake 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, relate in particular 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, the destruction that sand erosion causes the hydraulic turbine is very serious.For high water head hinge, it is the effective measures that minimizing rough sand is crossed machine that bottom hole for sand flushing or flood and sand discharging hole are set.Bottom hole for sand flushing is generally arranged in the bottom of power station water inlet, utilizes flood discharge to form and wash away funnel before the water inlet of power station, 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 water inlet bottom, power station, is arranged in water inlet both sides, power station, washes away funnel scope less, is difficult to the sand discharge effect that reaches desirable.Water inlet leading edge in the type power station is generally long in addition, and its object cannot be realized in single sand discharge hole at all, along water inlet leading edge, multiple sand discharges hole is set and is difficult to again arrange.Eight Pan Xia power stations arrange wide gap sand discharge in gallery top on the unit inducer base plate of power station, and operation result shows, mouthful door flow velocity is little, draws husky hole conveyance capacity little, draws husky scope little, and easily produces silting in gallery.
Summary of the invention:
It is difficult to arrange for low water head river channel hinge power station water inlet desilting works, and be difficult to the problems such as the sand discharge effect that reaches desirable, inventor is through Theoretical Design and a large amount of hydraulic model tests, designed a kind of employing narrow slit type flush gallery that broadens and carried out the method for sand discharge.Technical scheme of the present invention is as follows:
A sand discharge method for low water head river channel hinge power station water inlet, comprises building laying and the method for operation:
(1) building is laid: on the right side of described power station water inlet, dam foundation sand discharge hole is set, described dam foundation sand discharge hole is provided with sand discharge hole access door and sand discharge hole service gate; Leading edge at described power station water inlet is laid one sediment trapping bank completely, before described sediment trapping bank, lay gallery for sediment transport, described gallery for sediment transport is connected with described dam foundation sand discharge hole, be provided with horizontal joint sediment ejection opening at described gallery for sediment transport top, the width of described horizontal joint sediment ejection opening starts to narrow gradually from upstream, and the cross section of described gallery for sediment transport starts to increase gradually from upstream;
(2) method of operation: non-flood season and power station error-free running period, described sand discharge hole service gate is in closed condition, in the time that before described sediment trapping bank, silt height approaches sediment trapping bank height, open described sand discharge hole service gate, carry out sand discharge, complete while drawing hourglass bucket when forming before described sediment trapping bank, close described sand discharge hole service gate; In flood season, when flood, described sand discharge hole service gate is held open.
Preferably, described sediment trapping bank and gallery for sediment transport, be arranged on the end of the flat slope section of power station water inlet.
Sand discharge method of the present invention, has following several inventive points:
(1) sediment trapping bank and gallery for sediment transport are used in conjunction with, and have played the effect of section husky groove, prevent that rough sand from entering power station water inlet;
(2) adopt first the narrow slit type gallery for sediment transport that broadens, the horizontal joint sediment ejection opening that is gallery for sediment transport top starts to narrow from the width gradually from upstream, and gallery for sediment transport starts from upstream to increase gradually, both work in coordination, can before sediment trapping bank, form the funnel that washes away of a strip, really reach the sand discharge effect of " clear in front of the door " before the water inlet of power station.
(3) existing gallery for sediment transport and sediment ejection opening operated by rotary motion are at the slope section of power station water inlet, near the entrance in power station, although flow velocity is large herein, scouring force is strong, but because entering slope section flow velocity, current increase suddenly, be unfavorable for the precipitation of coarse sediment, and close to the entrance of power station, cause a large amount of coarse sediments to enter power station.Sediment trapping bank of the present invention and gallery for sediment transport, be preferably arranged on the end of the flat slope section of power station water inlet, and water inlet is about to become the position of slope section from flat slope section, is conducive to sediment, the discharge of coarse sediment.
Sand discharge method of the present invention, principle is simple, easy construction, water consumption is little, can prevent that the power station rear silt of permanent operation from entering unit runner, and sand discharge effect is remarkable.
Brief description of the drawings:
The sand discharge building layout plan that Fig. 1, sand discharge method of the present invention adopt
The skiagraph of the narrow slit type flush gallery that broadens that Fig. 2, the present invention adopt
The sectional drawing of the narrow slit type flush gallery that broadens that Fig. 3, the present invention adopt
In figure, 1 is power station water inlet, and 2 is sediment trapping bank, 3 galleries for sediment transport, and 4 is horizontal joint sediment ejection opening, 5 is dam foundation sand discharge hole, 6, sand discharge hole access door, 7 is sand discharge hole service gate, 8 is power station entrance.
Detailed description of the invention:
Below in conjunction with embodiment and accompanying drawing 1-3, the invention will be further described:
The sand discharge method of low water head river channel hinge of the present invention power station water inlet, comprises building laying and the method for operation:
(1) building is laid: on the right side of described power station water inlet 1, dam foundation sand discharge hole 5 is set, described dam foundation sand discharge hole 5 is provided with sand discharge hole access door 6 and sand discharge hole service gate 7.Leading edge at described power station water inlet 1 is laid sediment trapping bank 2 one completely, at the front laying gallery for sediment transport 3 of described sediment trapping bank 2.Described gallery for sediment transport 3 is connected with described dam foundation sand discharge hole 5, is provided with horizontal joint sediment ejection opening 4 at described gallery for sediment transport 3 tops, and the width of described horizontal joint sediment ejection opening 4 starts to narrow gradually from upstream, and the cross section of described gallery for sediment transport 3 starts to increase gradually from upstream.Sediment trapping bank 2 and gallery for sediment transport 3 should be arranged in the flat slope section of power station water inlet as far as possible, the preferably end of flat slope section, being water inlet is about to become the position of slope section from flat slope section, and, in order to ensure the stable and best hydraulics of building, sediment trapping bank 2 should be located at 0.5-2 rice, upstream of flat slope section and slope section boundary line, flow condition herein, both be conducive to the alluvial of coarse sediment, be 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 tops, banded water outlet flow forms the eddy current of structure disturbance in flush gallery, greatly strengthen the sediment carrying capacity of current, make alluvial emptying rapidly at the silt of flush gallery and perimeter zone, thereby form the funnel that washes away of a strip at water inlet forward position, power station 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 be in conjunction with power station total size, and the water in river carrys out husky condition, is determined by conventional design, calculating means.
(2) method of operation: non-flood season and power station error-free running period, described sand discharge hole service gate 7 is in closed condition, in the time that the front silt height of described sediment trapping bank 2 approaches sediment trapping bank 2 height, open described sand discharge hole service gate 7, carry out sand discharge, when the front formation of described sediment trapping bank 2 is complete while drawing hourglass bucket, close described sand discharge hole service gate 7; In flood season, when flood, described sand discharge hole 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 power station water inlet 1; The downstream of gallery for sediment transport 3 and horizontal joint sediment ejection opening 4, refers to the right side of power station water inlet 1.
The invention solves low water head river channel hinge sand discharge building difficult arrangement, be difficult to the problems such as the sand discharge effect that reaches desirable according to conventional layout, and principle is simple, water consumption is little, practical, there is higher practical value to having in river course water compared with building river channel hinge power station on the river of high concentration of sediment.
Claims (2)
1. a sand discharge method for low water head river channel hinge power station water inlet, comprises building laying and the method for operation:
(1) building is laid: on the right side of described power station water inlet, dam foundation sand discharge hole is set, described dam foundation sand discharge hole is provided with sand discharge hole access door and sand discharge hole service gate; Leading edge at described power station water inlet is laid one sediment trapping bank completely, before described sediment trapping bank, lay gallery for sediment transport, described gallery for sediment transport is connected with described dam foundation sand discharge hole, be provided with horizontal joint sediment ejection opening at described gallery for sediment transport top, the width of described horizontal joint sediment ejection opening starts to narrow gradually from upstream, and the cross section of described gallery for sediment transport starts to increase gradually from upstream;
(2) method of operation: non-flood season and power station error-free running period, described sand discharge hole service gate is in closed condition, in the time that before described sediment trapping bank, silt height approaches sediment trapping bank height, open described sand discharge hole service gate, carry out sand discharge, complete while drawing hourglass bucket when forming before described sediment trapping bank, close described sand discharge hole service gate; In flood season, when flood, described sand discharge hole service gate is held open.
2. the sand discharge apparatus of low water head river channel hinge according to claim 1 power station water inlet, is characterized in that, described sediment trapping bank and gallery for sediment transport are arranged in the end of the flat slope section of described power station water inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410076712.1A CN103882838B (en) | 2014-02-27 | 2014-02-27 | A kind of sand discharge method of low water head river channel hinge powerplant intakes |
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| CN201410076712.1A CN103882838B (en) | 2014-02-27 | 2014-02-27 | A kind of sand discharge method of low water head river channel hinge powerplant intakes |
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| CN103882838A true CN103882838A (en) | 2014-06-25 |
| CN103882838B CN103882838B (en) | 2015-12-02 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104099908A (en) * | 2014-07-31 | 2014-10-15 | 中国电建集团成都勘测设计研究院有限公司 | Gravity type sand obstructing and guiding structure |
| CN105089021A (en) * | 2014-05-07 | 2015-11-25 | 天津虹炎科技有限公司 | Sediment disposal system for water inlets of power station |
| CN105089022A (en) * | 2014-05-07 | 2015-11-25 | 天津虹炎科技有限公司 | Sediment disposal method for water inlets of power station |
| CN106013005A (en) * | 2016-07-13 | 2016-10-12 | 长江水利委员会长江科学院 | Variable cross section desilting gallery system suitable for high-water-depth reservoir |
| CN109898474A (en) * | 2019-03-18 | 2019-06-18 | 张鑫 | A kind of more reservoir area reservoirs |
| CN109914333A (en) * | 2019-03-18 | 2019-06-21 | 张鑫 | A kind of integrated dispatch method of reservoir |
| CN110055925A (en) * | 2019-03-18 | 2019-07-26 | 黄河水利委员会黄河水利科学研究院 | A kind of heavily silt-carrying river large and middle reservoirs flood season water storage sand discharge separation system |
| CN110144861A (en) * | 2019-06-05 | 2019-08-20 | 黄河勘测规划设计研究院有限公司 | A kind of the sand discharge structure and method of heavily silt-carrying river natural flow station |
| CN110258468A (en) * | 2019-07-05 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Sand structure is blocked in hydraulic tunnel |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2057929U (en) * | 1989-09-06 | 1990-06-06 | 何泉林 | Automatic siphon scouring canal |
| JPH10159065A (en) * | 1996-11-28 | 1998-06-16 | Fujita Corp | Discharging method of sediment in dam storage reservoir |
| CN101003970A (en) * | 2006-06-29 | 2007-07-25 | 谭培根 | Conveyer way of self-discharging sand |
| JP2008050770A (en) * | 2006-08-22 | 2008-03-06 | Hazama Corp | Deposit evacuation system of dam |
| CN201151898Y (en) * | 2007-12-05 | 2008-11-19 | 中国水电顾问集团中南勘测设计研究院 | Hydraulic power plant water inlet sand-repellent facilities |
| CN201713794U (en) * | 2010-06-22 | 2011-01-19 | 中国水电顾问集团北京勘测设计研究院 | Desilting facility |
| CN102277894A (en) * | 2010-06-12 | 2011-12-14 | 中国水电顾问集团贵阳勘测设计研究院 | Method and facility for getting water through hierarchical guiding and discharging of channel deposits |
| CN102304912A (en) * | 2011-07-21 | 2012-01-04 | 中国水电顾问集团华东勘测设计研究院 | Sink-type top inflow sand flushing gallery structure |
-
2014
- 2014-02-27 CN CN201410076712.1A patent/CN103882838B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2057929U (en) * | 1989-09-06 | 1990-06-06 | 何泉林 | Automatic siphon scouring canal |
| JPH10159065A (en) * | 1996-11-28 | 1998-06-16 | Fujita Corp | Discharging method of sediment in dam storage reservoir |
| CN101003970A (en) * | 2006-06-29 | 2007-07-25 | 谭培根 | Conveyer way of self-discharging sand |
| JP2008050770A (en) * | 2006-08-22 | 2008-03-06 | Hazama Corp | Deposit evacuation system of dam |
| CN201151898Y (en) * | 2007-12-05 | 2008-11-19 | 中国水电顾问集团中南勘测设计研究院 | Hydraulic power plant water inlet sand-repellent facilities |
| CN102277894A (en) * | 2010-06-12 | 2011-12-14 | 中国水电顾问集团贵阳勘测设计研究院 | Method and facility for getting water through hierarchical guiding and discharging of channel deposits |
| CN201713794U (en) * | 2010-06-22 | 2011-01-19 | 中国水电顾问集团北京勘测设计研究院 | Desilting facility |
| CN102304912A (en) * | 2011-07-21 | 2012-01-04 | 中国水电顾问集团华东勘测设计研究院 | Sink-type top inflow sand flushing gallery structure |
Non-Patent Citations (2)
| Title |
|---|
| 杨志明: "筱溪水电站排沙廊道设计", 《湖南水利水电》 * |
| 靳若兰: "水平缝式排沙廊道进口设计探讨", 《四川大学学报(工程科学版)》 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089021A (en) * | 2014-05-07 | 2015-11-25 | 天津虹炎科技有限公司 | Sediment disposal system for water inlets of power station |
| CN105089022A (en) * | 2014-05-07 | 2015-11-25 | 天津虹炎科技有限公司 | Sediment disposal method for water inlets of power station |
| CN104099908A (en) * | 2014-07-31 | 2014-10-15 | 中国电建集团成都勘测设计研究院有限公司 | Gravity type sand obstructing and guiding structure |
| CN104099908B (en) * | 2014-07-31 | 2017-01-18 | 中国电建集团成都勘测设计研究院有限公司 | Gravity type sand obstructing and guiding structure |
| CN106013005A (en) * | 2016-07-13 | 2016-10-12 | 长江水利委员会长江科学院 | Variable cross section desilting gallery system suitable for high-water-depth reservoir |
| CN109914333A (en) * | 2019-03-18 | 2019-06-21 | 张鑫 | A kind of integrated dispatch method of reservoir |
| CN109898474A (en) * | 2019-03-18 | 2019-06-18 | 张鑫 | A kind of more reservoir area reservoirs |
| CN110055925A (en) * | 2019-03-18 | 2019-07-26 | 黄河水利委员会黄河水利科学研究院 | A kind of heavily silt-carrying river large and middle reservoirs flood season water storage sand discharge separation system |
| CN109898474B (en) * | 2019-03-18 | 2021-01-29 | 张鑫 | Multi-reservoir-area water reservoir |
| CN110055925B (en) * | 2019-03-18 | 2021-06-29 | 黄河水利委员会黄河水利科学研究院 | Water storage and sand discharge separation system for large and medium reservoir in flood season of sandy river |
| CN110144861A (en) * | 2019-06-05 | 2019-08-20 | 黄河勘测规划设计研究院有限公司 | A kind of the sand discharge structure and method of heavily silt-carrying river natural flow station |
| 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 |
| CN110258468A (en) * | 2019-07-05 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Sand structure is blocked in hydraulic tunnel |
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