CN203701055U - Variable width seam type sand conveying device - Google Patents
Variable width seam type sand conveying device Download PDFInfo
- Publication number
- CN203701055U CN203701055U CN201420091735.5U CN201420091735U CN203701055U CN 203701055 U CN203701055 U CN 203701055U CN 201420091735 U CN201420091735 U CN 201420091735U CN 203701055 U CN203701055 U CN 203701055U
- Authority
- CN
- China
- Prior art keywords
- sand
- sediment
- gallery
- sand discharge
- discharge hole
- Prior art date
- 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
Links
Abstract
The utility model relates to a variable width seam type sand conveying device and belongs to the water conservancy project field. The IPC (International Patent Classification) numbers are E02B9/00, E02B9/04 and E02B1/00. The front edge of a water inlet of a power plant is provided with a sand blocking ridge; a sand conveying gallery is arranged in front of the sand blocking ridge; the sand conveying gallery is connected with a dam foundation sand discharging hole; the top of the sand conveying gallery is provided with a horizontal seam sand discharging hole; the width of the horizontal seam sand discharging hole is gradually narrowed from the upstream; the cross section of the sand conveying gallery is gradually increased from the upstream. According to the variable width seam type sand conveying device, the sand blocking ridge is matched with the variable width seam type sand conveying gallery and accordingly the function of a sand intercepting groove is achieved, a long-strip-shaped scouring funnel can be formed in front of the sand blocking ridge, and the good sand discharging effect in front of the water inlet of the power plant is really 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 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.
Utility model content:
It is difficult to arrange for low water head river channel hinge power station water inlet desilting works, and the problem such as the sand discharge effect that is difficult to reach desirable, and utility model people is through Theoretical Design and a large amount of hydraulic model tests, has designed the one narrow slit type sediment transport device that broadens.The technical solution of the utility model is as follows:
The one narrow slit type sediment transport device that broadens, comprises sediment trapping bank, gallery for sediment transport and dam foundation sand discharge hole, and described dam foundation sand discharge hole is located at the right side of 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; Described sediment trapping bank is located at the leading edge of power station water inlet, described gallery for sediment transport is arranged on before described sediment trapping bank, 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.
Sediment transport device of the present utility model, adopt first the narrow slit type gallery for sediment transport that broadens, and be used in conjunction with sediment trapping bank, played the effect of section husky groove, 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.
Brief description of the drawings:
The layout plan of Fig. 1, sand discharge apparatus of the present utility model
The skiagraph of the narrow slit type flush gallery that broadens that Fig. 2, the utility model adopt
The A-A profile of the narrow slit type flush gallery that broadens that Fig. 3, the utility model adopt
The B-B profile of the narrow slit type flush gallery that broadens that Fig. 4, 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.
Detailed description of the invention:
Below in conjunction with embodiment and accompanying drawing 1-3, the utility model is described in further detail:
The one narrow slit type sediment transport device that broadens, comprises sediment trapping bank 2, gallery for sediment transport 3 and dam foundation sand discharge hole 5, and described dam foundation sand discharge hole 5 is located at the right side of 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; Described sediment trapping bank 2 is located at the leading edge of power station water inlet 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 sand discharge hole 5, be provided with horizontal joint sediment ejection opening 4 at described gallery for sediment transport 3 tops, 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 meters of upstreams 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.
The method of operation of sediment transport device 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, 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 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, 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 (1)
1. the narrow slit type sediment transport device that broadens, comprises sediment trapping bank, gallery for sediment transport and dam foundation sand discharge hole, it is characterized in that, described dam foundation sand discharge hole is located at the right side of 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; Described sediment trapping bank is located at the leading edge of power station water inlet, described gallery for sediment transport is arranged on before described sediment trapping bank, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420091735.5U CN203701055U (en) | 2014-02-27 | 2014-02-27 | Variable width seam type sand conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420091735.5U CN203701055U (en) | 2014-02-27 | 2014-02-27 | Variable width seam type sand conveying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203701055U true CN203701055U (en) | 2014-07-09 |
Family
ID=51051512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420091735.5U Expired - Fee Related CN203701055U (en) | 2014-02-27 | 2014-02-27 | Variable width seam type sand conveying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203701055U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355134A (en) * | 2014-10-14 | 2015-02-18 | 成都科创佳思科技有限公司 | Sand transporting device |
| 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 |
| CN106368185A (en) * | 2016-10-21 | 2017-02-01 | 长江水利委员会长江科学院 | Hydropower station water inlet gallery desilting system and method |
-
2014
- 2014-02-27 CN CN201420091735.5U patent/CN203701055U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104355134A (en) * | 2014-10-14 | 2015-02-18 | 成都科创佳思科技有限公司 | Sand transporting device |
| CN106368185A (en) * | 2016-10-21 | 2017-02-01 | 长江水利委员会长江科学院 | Hydropower station water inlet gallery desilting system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103882838B (en) | A kind of sand discharge method of low water head river channel hinge powerplant intakes | |
| CN103882839B (en) | A kind of sand flushing system of low water head river channel hinge powerplant intakes | |
| CN204112294U (en) | Dual channel formula flow velocity controlled ecological fish pass | |
| CN112281770B (en) | Flood discharge structure adopting bottom hole and surface hole combined flood discharge and energy dissipation | |
| CN103410130B (en) | Multi-purpose tunnel arrangement structure | |
| CN203701055U (en) | Variable width seam type sand conveying device | |
| CN203904946U (en) | Sediment transport device | |
| CN203904944U (en) | Desilting system at water inlets of power station | |
| CN201915369U (en) | Vehicle sheet water flow control and energy dissipation structure for high overfall dam | |
| CN203021973U (en) | Sand intercepting groove | |
| CN206706699U (en) | Ramp type sand surfing structure | |
| CN206693187U (en) | A kind of spillway structure | |
| CN106869090B (en) | Dreg-blocking board sub-assembly and diversion tunnel debris retaining Slagoff method | |
| CN201978546U (en) | Roadway through type underground water precipitation system | |
| Auel et al. | Sediment management in the Solis reservoir using a bypass tunnel | |
| CN105089021A (en) | Sediment disposal system for water inlets of power station | |
| CN105089022A (en) | Sediment disposal method for water inlets of power station | |
| CN213538900U (en) | Desilting and sand-discharging device for steel dam | |
| CN108360472B (en) | Sluice "L" trash rack mound and "zigzag" arrangement structure thereof | |
| CN104099908B (en) | Gravity type sand obstructing and guiding structure | |
| CN208151985U (en) | Sluice " L " type trash rack pier and its " zigzag " arragement construction | |
| CN105089025A (en) | Sediment transport device | |
| CN208717869U (en) | The diversion canal to sluice for big gradient, high flow rate | |
| CN206538731U (en) | A kind of flood discharge breakwater with multiple wave absorption function | |
| CN203977376U (en) | Contraction type transverse joint import flush gallery |
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: 20140709 Termination date: 20150227 |
|
| EXPY | Termination of patent right or utility model |