CN201933471U - Double-layer separation flood discharge structure of side spillway - Google Patents
Double-layer separation flood discharge structure of side spillway Download PDFInfo
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- CN201933471U CN201933471U CN2010206557656U CN201020655765U CN201933471U CN 201933471 U CN201933471 U CN 201933471U CN 2010206557656 U CN2010206557656 U CN 2010206557656U CN 201020655765 U CN201020655765 U CN 201020655765U CN 201933471 U CN201933471 U CN 201933471U
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- distribution plate
- flow distribution
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Abstract
The utility model provides a double-layer separation flood discharge structure of a side spillway, which comprises a spillway, a double-diffusive sill, a flow distribution plate, a vertical supporting pier and a reverse suspended sunk fence, wherein the upstream end of the flow distribution plate is connected with the spillway, and the downstream end of the flow distribution plate is arranged above the spillway; the bottom of the flow distribution pate is supported by the vertical supporting pier, and the reverse suspended sunk fence is arranged on the upper surface of the flow distribution plate and is in skew intersection with one side wall of the spillway; and the double-diffusive sill is positioned downstream the flow distribution plate. When the flood discharge is carried out by the double-layer separation flood discharge structure, one part of water flow passes through the reverse suspended sunk fence through the flow distribution plate and then reversely jets, and the other part of the water flow flows down from the flow distribution plate and flows towards the double-diffusive sill along the spillway, and then jets into a downstream riverbed. The double-layer separation flood discharge structure has the advantages that: the water-entrance discharge per unit width actually entering the downstream can be reduced by 87% to 91%, and the destructive action of high-speed jet flow on natural rivers can be obviously reduced.
Description
[technical field]
The utility model relates to a kind of dam structure with flood discharge function, a kind of specifically novel side flood spillway double layer separation flood discharge structure.
[background technology]
Ski-jump spillway is the most common trajectory bucket type energy of senior middle school's head in the water conservancy and hydropower Dam Construction.Because it can throw jet flow downstream away from base of dam, thereby saved energy dissipating erosion control engineering such as absorption basin, and helped the layout of building, therefore, under many circumstances, ski-jump spillway can be more superior than other energy dissipaters.But this energy dissipater also has its weakness, and at first flip bucket structure itself is because of being flow-guiding structure rather than diffusing flow structure, and like this, the high-velocity flow of the huge energy of carrying under one's arms is directly injected underwater bed, must cause serious scour.Secondly, running into the extreme terrain condition, as flood spillway and riverbed oblique, the riverbed is narrow, and riverbed, flood spillway opposite bank geological conditions is poor, riverbed turning etc., make the overflow place of entry be difficult to control, low discharge is chosen apart from not enough, and overflow impacts this bank, big flow overflow is chosen apart from excessive, impact the opposite bank, cause the large tracts of land channel-bank slumping, work the mischief to environment, need to drop into substantial contribution and build bank protection work, high-velocity flow is to the safety of washing away even have influence on engineering self in river sometimes.As Hou Long small stream secondary power station, Fujian, maximum height of dam 74.8m, flip trajectory bucket.During flood handling during construction, let out only 40m of discharge per unit width down
3/ s has just formed the huge hole that dashes of dark about 10m, dash the bosom, hole apart from the dam base of dam less than the 10m place, make to have a strong impact on dam safety by dam obviously " heel shakiness ".
[utility model content]
The technical problems to be solved in the utility model is to provide a kind of side flood spillway double layer separation flood discharge structure, and it can effectively be controlled the high-speed jet water-drop point and let out the distribution of kinetic energy in the riverbed down, guarantees dam and riverbank, downstream safety, significantly reduces bed scour.
The utility model is achieved in that
A kind of side flood spillway of the utility model double layer separation flood discharge structure, it comprises flood spillway, double diffusion bank, it also comprises: flow distribution plate, vertical support pier, hang parapet by the feet, described flow distribution plate upstream extremity connects flood spillway, downstream is suspended at the top of flood spillway, and the bottom of flow distribution plate is supported with the vertical support pier, describedly hangs the upper surface that parapet is arranged at described flow distribution plate by the feet, and with an abutment wall oblique of described flood spillway, described double diffusion bank is positioned at the downstream of described flow distribution plate.
Further, described flow distribution plate is by an antiparallelogram and the platy structure that right-angled trapezium is formed, and the base of described antiparallelogram and right-angled trapezium overlaps, and the upstream extremity width of described flow distribution plate is less than the downstream width.
Further, described vertical support pier is that the longitudinal section is leg-of-mutton wedge.
Further, the angle of the upper surface of described medial surface of hanging parapet by the feet and described flow distribution plate is an acute angle.
Further, the described parapet of hanging by the feet is arranged on the flow distribution plate, is positioned at the side away from the riverbed.
Further, described double diffusion bank is that left and right sides abutment wall all extends out, and longitudinal profile is the works of circular arc.
Advantage of the present utility model is:
The utility model is when flood discharge, a current part is by the flow distribution plate ejaculation of overturning after hanging parapet by the feet, another part is by under the flow distribution plate, after flowing to described double diffusion bank along described flood spillway, inject underwater bed because flow distribution plate, hang parapet by the feet, the double diffusion bank is not only simple flow-guiding structure, the more important thing is the effect of having played a kind of diffusing stream, current are disperseed, energy is disperseed, through after these structure controls, high-velocity flow is shot shape " evenly spill to " underwater bed basically, and actual entry discharge per unit width reduces 87%～91%, therefore the utility model can effectively be controlled the high-speed jet water-drop point and let out the distribution of kinetic energy in the riverbed down, guarantee dam and riverbank, downstream safety, significantly reduce bed scour, dam flood-discharge is reduced the adverse effect of natural environment.
[description of drawings]
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is a whole plane view of the present utility model.
Fig. 2 is a complete section face view of the present utility model.
Fig. 3 is the zoomed-in view of flow distribution plate of the present utility model, vertical support pier.
Fig. 4 is the parapet zoomed-in view of hanging by the feet of the present utility model.
[specific embodiment]
See also Fig. 1 to shown in Figure 4, embodiment of the present utility model is described in detail.
As shown in Figure 1 and Figure 2, it comprises the utility model flood spillway 1, flow distribution plate 2, vertical support pier 3, hangs parapet 4, double diffusion bank 5 by the feet, described flow distribution plate 2 upstream extremities connect flood spillway 1, downstream is suspended at the top of flood spillway 1, the bottom of flow distribution plate 2 is supported with vertical support pier 3, describedly hang the upper surface that parapet 4 is arranged at described flow distribution plate 2 by the feet, and with an abutment wall oblique of described flood spillway 1, described double diffusion bank 5 is positioned at the downstream of described flow distribution plate 2.Described flow distribution plate 2 is by an antiparallelogram and the platy structure that right-angled trapezium is formed, and the base of described antiparallelogram and right-angled trapezium overlaps, and the upstream extremity width of described flow distribution plate 2 is less than the downstream width.As Fig. 3, described vertical support pier 3 is that the longitudinal section is leg-of-mutton wedge.In conjunction with Fig. 4, the angle of the upper surface of described medial surface of hanging parapet 4 by the feet and described flow distribution plate 2 is an acute angle, and is positioned at the opposite side away from the riverbed.Described double diffusion bank 5 all extends out for left and right sides abutment wall, and longitudinal profile is the works of circular arc.
The described parapet 4 of hanging by the feet is in order to control down the direction and the diffusance of the stream that sluices, and described double diffusion bank 5 can be provoked high-velocity flow.Because flow distribution plate and flood-relief channel are at an angle, so during flood discharge, a current part is by flow distribution plate 2 ejaculation of overturning after hanging parapet 4 by the feet, another part is by flow distribution plate 2 times, then along described flood spillway 1, flow to described double diffusion bank 5 after, inject underwater bed.The described parapet 4 of hanging by the feet is positioned at a side away from the riverbed, be positioned at the right side as riverbed among the figure, hang parapet 4 by the feet and be positioned at the left side, and according to circumstances be set to corresponding angle with the angle of described flow distribution plate 2, be generally acute angle, so after current rush to flow distribution plate 2, hang parapet 4 by the feet through what be positioned at the left side, be mapped to the riverbed that is positioned at the right side after rolling, thereby separate with the current that flow down along flood-relief channel 1.
The utility model is because current are divided into three parts during dam flood-discharge, a part is let out for 1 time along flood spillway by described flow distribution plate 2 left sides, another part is let out for 1 time along flood spillway by described flow distribution plate 2 right sides, the third part current pass through described flow distribution plate 2, and inject underwater bed through the parapet 4 of hanging by the feet that is arranged on flow distribution plate 2.Current from described flow distribution plate 2 left and right sides outflow, shunted 1/3 to 1/2 of flood spillway 1 total discharge, the current discharge per unit width that enters described flow distribution plate 2 is significantly descended, these two parts current are before entering described double diffusion bank 5, bump mutually takes place, and kinetic energy has obtained subduing, because the diffusion of described double diffusion bank 5 self, make this part kinetic energy obtain the current of subduing, after effective adjusting of described double diffusion bank 5, inject underwater bed again.The third part current then release along described flow distribution plate 2, by described hang the climbing of parapet 4 by the feet after, on turn over, kinetic energy is also subdued, and injects underwater bed then.Owing to described flow distribution plate 2, hang parapet 4 by the feet, double diffusion bank 5 is not only simple flow-guiding structure, the more important thing is the effect of having played a kind of diffusing stream, current are disperseed, energy is disperseed, through after these structure controls, high-velocity flow is shot shape " evenly spill to " underwater bed basically, and actual entry discharge per unit width reduces 87%～91%.So the utility model can reach the purpose of drafting.
The above, it only is the utility model preferred embodiment, so can not limit the scope that the utility model is implemented according to this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (6)
1. side flood spillway double layer separation flood discharge structure, it comprises flood spillway, double diffusion bank, it is characterized in that: it also comprises: flow distribution plate, vertical support pier, hang parapet by the feet, described flow distribution plate upstream extremity is connected in flood spillway, downstream is suspended at the top of flood spillway, and the bottom of flow distribution plate is supported with the vertical support pier, describedly hangs the upper surface that parapet is arranged at described flow distribution plate by the feet, and with an abutment wall oblique of described flood spillway, described double diffusion bank is positioned at the downstream of described flow distribution plate.
2. a kind of side flood spillway double layer separation flood discharge structure according to claim 1, it is characterized in that: described flow distribution plate is by an antiparallelogram and the platy structure that right-angled trapezium is formed, the base of described antiparallelogram and right-angled trapezium overlaps, and the upstream extremity width of described flow distribution plate is less than the downstream width.
3. a kind of side flood spillway double layer separation flood discharge structure according to claim 1 is characterized in that: described vertical support pier is that the longitudinal section is leg-of-mutton wedge.
4. a kind of side flood spillway double layer separation flood discharge structure according to claim 1 is characterized in that: the angle of the upper surface of described medial surface of hanging parapet by the feet and described flow distribution plate is an acute angle.
5. a kind of side flood spillway double layer separation flood discharge structure according to claim 4, it is characterized in that: the described parapet of hanging by the feet is arranged on the flow distribution plate, is positioned at the side away from the riverbed.
6. a kind of side flood spillway double layer separation flood discharge structure according to claim 1, it is characterized in that: described double diffusion bank is that left and right sides abutment wall all extends out, and longitudinal profile is the works of circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206557656U CN201933471U (en) | 2010-12-13 | 2010-12-13 | Double-layer separation flood discharge structure of side spillway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206557656U CN201933471U (en) | 2010-12-13 | 2010-12-13 | Double-layer separation flood discharge structure of side spillway |
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| Publication Number | Publication Date |
|---|---|
| CN201933471U true CN201933471U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206557656U Expired - Lifetime CN201933471U (en) | 2010-12-13 | 2010-12-13 | Double-layer separation flood discharge structure of side spillway |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652380A (en) * | 2015-01-22 | 2015-05-27 | 河海大学 | Novel matched variable slope spillway-based flood discharging system |
| RU2647895C1 (en) * | 2017-08-08 | 2018-03-21 | Михаил Иванович Голубенко | Water flow energy dampener |
-
2010
- 2010-12-13 CN CN2010206557656U patent/CN201933471U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652380A (en) * | 2015-01-22 | 2015-05-27 | 河海大学 | Novel matched variable slope spillway-based flood discharging system |
| RU2647895C1 (en) * | 2017-08-08 | 2018-03-21 | Михаил Иванович Голубенко | Water flow energy dampener |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110817 |
|
| CX01 | Expiry of patent term |