CN203904944U - Desilting system at water inlets of power station - Google Patents
Desilting system at water inlets of power station Download PDFInfo
- Publication number
- CN203904944U CN203904944U CN201420201356.7U CN201420201356U CN203904944U CN 203904944 U CN203904944 U CN 203904944U CN 201420201356 U CN201420201356 U CN 201420201356U CN 203904944 U CN203904944 U CN 203904944U
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- China
- Prior art keywords
- sediment
- sand
- power station
- gallery
- discharge hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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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Abstract
The utility model relates to a desilting system at the water inlets of a power station, and belongs to the field of water control projects; the IPC of the desilting system is E02B9/00, E02B9/04, and E02B1/00. According to the desilting system, a sand blocking bank is laid on the front edge at the water inlets of the power station in a whole line; a sand transporting corridor is paved in front of the sand blocking bank, and is connected with a dam foundation desilting tunnel; a horizontal slit desilting port is formed in the top of the sand transporting corridor; the width of the horizontal slit desilting port is gradually narrowed from the upstream; the cross section of the sand transporting corridor is gradually enlarged from the upstream. The sand blocking bank and the widened narrow slit sand transporting corridor are matched for use, so that the function of a sand trapping tank is played; a strip-shaped eroded hopper can be formed in front of the sand blocking bank; the desilting effect of 'clearness in front of door' in front of the water inlets of the power station is veritably achieved.
Description
Technical field:
The utility model relates to a kind of intake of hydropower station and gets 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 to reduce the effective measures that 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, a plurality of 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.
Utility model content:
It is difficult for low water head river channel hinge power station water inlet desilting works, to arrange, and be difficult to the problems such as sand discharge effect that reach desirable, utility model people is through Theoretical Design and a large amount of hydraulic model tests, designed the broaden sand flushing system of narrow slit type flush gallery of a kind of employing.The technical solution of the utility model is as follows:
A sand flushing system for power station water inlet, comprises sediment trapping bank, gallery for sediment transport and dam foundation sand discharge hole, and described dam foundation sand discharge hole is arranged in the right side of described power station water inlet, and described dam foundation sand discharge hole is provided with sand discharge hole access door and sand discharge hole service gate; In the leading edge of described power station water inlet, lay described sediment trapping bank completely, before described sediment trapping bank, lay described gallery for sediment transport, described gallery for sediment transport is connected with described dam foundation sand discharge hole, at described gallery for sediment transport top, be provided with horizontal joint sediment ejection opening, the width of described horizontal joint sediment ejection opening starts to narrow down gradually from upstream, and the cross section of described gallery for sediment transport starts to increase gradually from upstream.
Sand flushing system of the present utility model, has following several utility models point:
(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 from upstream by wide, to be narrowed down gradually, 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 are arranged on the slope section of power station water inlet, entrance near power station, although flow velocity is large herein, scouring force is strong, but because entering slope section flow velocity, current increase suddenly, the precipitation that is unfavorable for coarse sediment, and close to entrance, cause a large amount of coarse sediments to enter power station.Sediment trapping bank of the present utility model 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 flushing system of the present utility model, 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.
Accompanying drawing explanation:
The layout plan of Fig. 1, sand flushing system of the present utility model
The skiagraph of the narrow slit type flush gallery that broadens that Fig. 2, the utility model adopt
The sectional drawing of the narrow slit type flush gallery that broadens that Fig. 3, the utility model 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.
The specific embodiment:
Below in conjunction with embodiment and accompanying drawing 1-3, the utility model is described in further detail:
The sand flushing system of power station of the present utility model water inlet, comprise sediment trapping bank 2, gallery for sediment transport 3 and dam foundation sand discharge hole 5, described dam foundation sand discharge hole 5 is arranged in the right side of described power station water inlet 1, and described dam foundation sand discharge hole 5 is provided with sand discharge hole access door 6 and sand discharge hole service gate 7; In the leading edge of described power station water inlet 1, lay described sediment trapping bank 2 completely, at the described gallery for sediment transport 3 of the front laying of described sediment trapping bank 2, described gallery for sediment transport 3 is connected with described dam foundation sand discharge hole 5, at described gallery for sediment transport 3 tops, be provided with horizontal joint sediment ejection opening 4, the width of described horizontal joint sediment ejection opening 4 starts to narrow down 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 end of preferred flat slope section, and flow condition herein, is conducive to the alluvial of coarse sediment, is also conducive to the sand surfing of horizontal joint sediment ejection opening.Horizontal joint sediment ejection opening 4 due to gallery for sediment transport 3 tops, banded water outlet flow forms the eddy current of structure disturbance in flush gallery, greatly strengthened the sediment carrying capacity of current, make alluvial emptying rapidly at the silt of flush gallery and perimeter zone, thereby at water inlet forward position, power station sediment trapping bank, form the funnel that washes away of a strip, 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, by conventional design, calculating means, is determined.
The method of operation of sand flushing system of the present utility model: non-flood season and power station error-free running period, described sand discharge hole service gate 7 is in closed condition, when 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, during flood, described sand discharge hole service gate 7 is held open, and reduces rough sand and enters unit runner.
In the utility model, 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 utility model has solved low water head river channel hinge sand discharge building difficult arrangement, according to conventional layout, be difficult to the problems such as sand discharge effect that reach desirable, and principle is simple, water consumption is little, practical, to having in river course water compared with building river channel hinge power station on the river of high concentration of sediment, there is higher practical value.
Claims (1)
1. a sand flushing system for power station water inlet, comprises sediment trapping bank, gallery for sediment transport and dam foundation sand discharge hole, and described dam foundation sand discharge hole is arranged in the right side of described power station water inlet, and described dam foundation sand discharge hole is provided with sand discharge hole access door and sand discharge hole service gate; In the leading edge of described power station water inlet, lay described sediment trapping bank completely, before described sediment trapping bank, lay described gallery for sediment transport, described gallery for sediment transport is connected with described dam foundation sand discharge hole, at described gallery for sediment transport top, be provided with horizontal joint sediment ejection opening, the width of described horizontal joint sediment ejection opening starts to narrow down gradually from upstream, and the cross section of described gallery for sediment transport starts to increase gradually from upstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201356.7U CN203904944U (en) | 2014-04-24 | 2014-04-24 | Desilting system at water inlets of power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420201356.7U CN203904944U (en) | 2014-04-24 | 2014-04-24 | Desilting system at water inlets of power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203904944U true CN203904944U (en) | 2014-10-29 |
Family
ID=51779234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420201356.7U Expired - Fee Related CN203904944U (en) | 2014-04-24 | 2014-04-24 | Desilting system at water inlets of power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203904944U (en) |
Cited By (3)
| 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 |
| CN114197411A (en) * | 2021-12-14 | 2022-03-18 | 江苏省水利勘测设计研究院有限公司 | Water conservancy water and electricity sand washing system |
-
2014
- 2014-04-24 CN CN201420201356.7U patent/CN203904944U/en not_active Expired - Fee Related
Cited By (3)
| 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 |
| CN114197411A (en) * | 2021-12-14 | 2022-03-18 | 江苏省水利勘测设计研究院有限公司 | Water conservancy water and electricity sand washing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20150424 |
|
| EXPY | Termination of patent right or utility model |