CN203977377U - Sediment trapping training for sediment structure - Google Patents
Sediment trapping training for sediment structure Download PDFInfo
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- CN203977377U CN203977377U CN201420429130.2U CN201420429130U CN203977377U CN 203977377 U CN203977377 U CN 203977377U CN 201420429130 U CN201420429130 U CN 201420429130U CN 203977377 U CN203977377 U CN 203977377U
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Abstract
The utility model discloses a kind of Hydraulic and Hydro-Power Engineering technical field that relates to, specifically a kind of sediment trapping training for sediment structure.The utility model provides a kind of sediment trapping training for sediment structure that prevents that bed load from crossing, comprise bank body, also comprise and be arranged on cornicing and basic toe board of bank body upstream face, described in cornice and be positioned on basic toe board, described in cornice and basic toe board between form concave shaped cavity.Reservoir lower floor water impact sediment trapping training for sediment bank, and upper cornice and re-entrant cavity that basic toe board forms in produce rotary roll current, silt bed load is rolled, is jumped with rotary roll current, cornicing preventing that silt bed load from crossing sediment trapping training for sediment bank top in top, significantly reduces the chance that silt bed load enters power station channel of approach.Because the angle of sediment trapping training for sediment bank and streamflow direction is less, to the rotary roll current before sediment trapping training for sediment bank, can play stronger guide effect, thereby by silt bed load guiding scouring sluice, prevent that it from piling up before sediment trapping training for sediment bank.
Description
Technical field
The utility model relates to Hydraulic and Hydro-Power Engineering technical field, specifically a kind of sediment trapping training for sediment structure.
Background technology
The sand content of general mountain stream is higher, the chance of crossing silt causes water turbine overflowing component inordinate wear, and sand grain causes the condition of depending on easily to gas core, make hydraulic turbine generation cavitation corrosion, shorten the time between overhauls(TBO) of Component of Hydraulic Turbines, both cause power generation loss, also increased maintenance cost, be unfavorable for the normal operation in power station and the performance of economic benefit.Therefore, the control of the silt in fully-loaded stream hydroelectric development design is an important technology content.
River load mainly comprises suspended load and bed load; Wherein suspended load refers to the thinner silt that is suspended in river course flowing water, moves down with flowing water and colloid etc., in transporting medium (fluid), because turbulent flow makes it to be in water away from bed surface the clast that suspended pattern is carried, normally clay, flour sand and fine sand.Bed load refers to that riverbed near surface is with the sand grain of slip, rolling or jumping mode motion under flow action.Natural river mostly belongs to turbulent flow, wherein exist the whirlpool body that many yardsticks do not wait, have different motion speed and direction of rotation, suspended load is suspended in current with water movement, its movement locus is very irregular, movement velocity and water velocity along water (flow) direction are roughly the same, maintain the energy of silt suspended motion mainly from flow turbulence energy, suspended load cannot be tackled conventionally.Bed load is that riverbed near surface moves with slip, rolling or jumping mode under flow action.
Block power plant is established a sediment trapping bank conventionally before factory building channel of approach at present, at the major river bed position of next-door neighbour's channel of approach, establishes scouring sluice, and silt bed load be take to interception as main, prevents that it from entering channel of approach, does not emphasize the training for sediment effect of sediment trapping bank.Sediment trapping bank height is larger, and sediment trapping effect is better.But owing to need to taking into account the HYDRODYNAMIC CONDITION RELATING TO of power station water inlet current, the height of sediment trapping bank again can not be too high, otherwise may produce drop, cause larger head loss, affect output of power station.
Pivotal hydraulics model testing shows: most of block power plant is in reservoir filling generating situation, sediment trapping bank forward position flow velocity is very little, be difficult to start coarse sediment, it is little to the sedimentation reduction effect of conventional sediment trapping bank leading edge when scouring sluice is opened sand discharge, subtracting becomes silted up is limited in scope, and often causes coarse sediment to be piled up in before sediment trapping bank.
In addition, because sediment trapping bank can not design too highly, the sediment trapping bank upstream face bodily form of prior art design is also unreasonable, consequently: current fling after sediment trapping bank, in river, bed load is rolled with current, thereby more easily cross highly limited sediment trapping bank and enter power station water inlet alluvial, further cause again the inordinate wear of the hydraulic turbine after entering unit runner.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of sediment trapping training for sediment structure that prevents that bed load from crossing.
The utility model solves the sediment trapping training for sediment structure that its technical problem adopts, and comprises bank body, also comprise and be arranged on cornicing and basic toe board of bank body upstream face, described in cornice and be positioned on basic toe board, described in cornice and basic toe board between form concave shaped cavity.
Further, described in, cornice and be arranged on the top of bank body.
Further, the angle of the longitudinal axis of described bank body and streamflow direction is less than 45 degree.
Further, described bank body longitudinal axis and the angle of streamflow direction and the relation of water velocity are: water velocity is lower, and the angle of bank body longitudinal axis and streamflow direction is less.
Further, the upper surface of described basic toe board is slope, and the incline direction of slope is tendency scouring sluice direction.
Further, described in the soffit that cornices towards basic toe board be skewed, the incline direction of soffit is the tendency direction that meets water.
The beneficial effects of the utility model are: reservoir lower floor water impact sediment trapping training for sediment bank, and upper cornice and re-entrant cavity that basic toe board forms in produce rotary roll current, silt bed load is rolled, is jumped with rotary roll current, cornicing preventing that silt bed load from crossing sediment trapping training for sediment bank top in top, significantly reduces the chance that silt bed load enters power station channel of approach.Because the angle of sediment trapping training for sediment bank and streamflow direction is less, to the rotary roll current before sediment trapping training for sediment bank, can play stronger guide effect, thereby by silt bed load guiding scouring sluice, prevent that it from piling up before sediment trapping training for sediment bank, and when the flow rate of water flow in sediment trapping training for sediment bank forward position is lower, the angle value of sediment trapping training for sediment bank and streamflow direction is less, to guarantee the husky effect of guide.When scouring sluice is opened, no matter whether generate electricity in power station, all can be by the silt bed load before the water inlet of power station discharged to dam downstream.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Component, position and numbering in figure: bank body 1; Cornice 2; Basis toe board 3; Inlet channel base plate flat slope section 4; Inlet channel base plate slope section 5; Structural joint 6; Sealing piece 7; Base covers line of demarcation 8; Original bed bottom surface 9.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, in figure, the direction of arrow is that river flows to, the utility model comprises bank body 1, also comprise be arranged on bank body 1 upstream face cornice 2 and basic toe board 3, cornice 2 and basic toe board 3 all along longitudinal laying of bank body 1, so that their longitudinal length is suitable with bank body 1, described in cornice and 2 be positioned on basic toe board 3, described in cornice 2 and basic toe board 3 between form concave shaped cavity.This gravity sediment trapping training for sediment bank key character is that band cornices 2 and basic toe board 3, form concave shaped concrete cavity, thereby produce rotary roll current before sediment trapping training for sediment bank, making silt bed load with rotary roll water movement, cornices and 2 will prevent that silt bed load from crossing sediment trapping training for sediment bank top and entering power station channel of approach in top.2 the cross sectional shape of cornicing can be trapezoidal, and square or circular arc all can.The shape of basis toe board 3 can be also trapezoidal, square or circular arc.Cornice 2 and basic toe board 3 can be also other shapes, to be conducive to the principle that is produced as of rotary roll current.
In Fig. 1, on river flows to, be connected with inlet channel base plate flat slope section 4 and inlet channel base plate slope section 5 in turn after the utility model.Structural joint 6 between three is provided with sealing piece 7.
As preferred embodiment, described in 2 tops that are arranged on bank body 1 of cornicing.Be positioned at cornicing of top and 2 just in time can stop that silt climbs over bank body 1, reach good sediment trapping effect.
Bank body 1 longitudinal axis of sediment trapping training for sediment bank and the angle of streamflow direction should be less than 45 degree, to playing stronger guide effect containing the rotary roll current of silt bed load, thereby by silt bed load guiding scouring sluice, prevent that it from piling up before sediment trapping training for sediment bank.When the flow rate of water flow in sediment trapping training for sediment bank forward position is lower, the angle value of sediment trapping training for sediment bank and streamflow direction is less.
For better training for sediment, the upper surface of described basic toe board 3 is slope, and the incline direction of slope is tendency scouring sluice direction.Slope can make on basic toe board 3 silt of the accumulation scouring sluice that more easily leads.This sediment trapping training for sediment structure is combined the scouring sluice of use, can be also flushing sluice.
Concrete, described in 2 soffits towards basic toe board 3 that cornice be skewed, the incline direction of soffit is the tendency direction that meets water.2 generations that are conducive to rotary roll current of cornicing of tilting, and structure is more reasonable.
Single with regard to sediment trapping effect, the cornicing of the utility model sediment trapping training for sediment bank top can prevent that silt bed load from crossing sediment trapping training for sediment bank top and entering power station channel of approach, and its sediment trapping successful exceeds level common sediment trapping bank.Simultaneously, the utility model is not limited to simply silt bed load is tackled, but silt bed load is tackled and guide simultaneously, in the situation that sediment trapping training for sediment bank is height-limited, both guaranteed power station get upper strata clear water for generating, reduced head loss, again can be by the guide of silt bed load to scouring sluice, prevent that it from piling up before sediment trapping training for sediment bank, its sand prevention effect of sedimentation reduction significantly exceeds prior art scheme.Simple in structure, the advantage such as engineering quantity is little, easy construction that the utility model sediment trapping sand discharge bank has, has good application prospect.
Claims (6)
1. sediment trapping training for sediment structure, comprise bank body (1), it is characterized in that: also comprise and be arranged on cornicing (2) and basic toe board (3) of bank body (1) upstream face, described cornicing (2) is positioned on basic toe board (3), described in cornice (2) and basic toe board (3) between form concave shaped cavity.
2. sediment trapping training for sediment structure as claimed in claim 1, is characterized in that: described in cornice (2) be arranged on the top of bank body (1).
3. sediment trapping training for sediment structure as claimed in claim 1, is characterized in that: the longitudinal axis of described bank body (1) and the angle of streamflow direction are less than 45 degree.
4. sediment trapping training for sediment structure as claimed in claim 3, it is characterized in that: described bank body (1) longitudinal axis and the angle of streamflow direction and the relation of water velocity are: water velocity is lower, and the angle of bank body (1) longitudinal axis and streamflow direction is less.
5. sediment trapping training for sediment structure as claimed in claim 1, is characterized in that: the upper surface of described basic toe board (3) is slope, and the incline direction of slope is tendency scouring sluice direction.
6. the sediment trapping training for sediment structure as described in claim as arbitrary in claim 1 to 5, is characterized in that: described in cornice (2) towards the soffit of basic toe board (3), be skewed, the incline direction of soffit is the tendency direction that meets water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429130.2U CN203977377U (en) | 2014-07-31 | 2014-07-31 | Sediment trapping training for sediment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420429130.2U CN203977377U (en) | 2014-07-31 | 2014-07-31 | Sediment trapping training for sediment structure |
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| Publication Number | Publication Date |
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| CN203977377U true CN203977377U (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420429130.2U Active CN203977377U (en) | 2014-07-31 | 2014-07-31 | Sediment trapping training for sediment structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869090A (en) * | 2017-03-24 | 2017-06-20 | 武汉大学 | Dreg-blocking board sub-assembly and diversion tunnel debris retaining Slagoff method |
| 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 |
-
2014
- 2014-07-31 CN CN201420429130.2U patent/CN203977377U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869090A (en) * | 2017-03-24 | 2017-06-20 | 武汉大学 | Dreg-blocking board sub-assembly and diversion tunnel debris retaining Slagoff method |
| CN106869090B (en) * | 2017-03-24 | 2019-01-18 | 武汉大学 | Dreg-blocking board sub-assembly and diversion tunnel debris retaining Slagoff method |
| 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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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |