CN211256912U - Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel - Google Patents
Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel Download PDFInfo
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- CN211256912U CN211256912U CN201921476515.3U CN201921476515U CN211256912U CN 211256912 U CN211256912 U CN 211256912U CN 201921476515 U CN201921476515 U CN 201921476515U CN 211256912 U CN211256912 U CN 211256912U
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Abstract
The utility model discloses a bank spillway/flood discharge hole outlet broken line type flip bucket, which comprises a flat bottom section, a reverse arc section, a gap section along the water flow direction, a flip bucket oblique section along the oblique water flow direction and a flip bucket top section along the vertical water flow direction, wherein the flat bottom section is connected with a discharge chute, the reverse arc section is positioned at the downstream of the flat bottom section, the top end of an inner side wall is terminated on the flat bottom section, and the flat bottom section at the downstream of the top end of the inner side wall and a reverse arc section are added to form a gap section along the water flow direction without a side wall; the top of the deflecting flow nose ridge is provided with a vertical water flow direction deflecting flow nose ridge top section close to the outer side wall, the vertical water flow direction deflecting flow nose ridge top section is connected with the gap section along the water flow direction through an inclined water flow direction deflecting flow nose ridge inclined section, so that water flows to the riverbed from the side direction during small discharge, and the water tongue is pulled out in a longitudinal fan shape during medium and large discharge to enter water along the main riverway. Not only can fully dissipate energy, but also can shorten the length of the bucket, and reduce the damage and influence on the bank slope at the outlet of the downstream spillway or flood discharge tunnel.
Description
Technical Field
The utility model belongs to the technical field of the flood discharge energy dissipation among the hydraulic and hydroelectric engineering and specifically relates to a broken-line flip bucket of bank spillway/flood discharge hole export.
Background
The water flow discharged from the spillway or the flood discharge tunnel has huge energy, and the high-speed concentrated water flow is connected with the normal water flow of the downstream river channel by full energy dissipation, otherwise, the downstream river bed, the bank slope and the building are seriously scoured and damaged. Trajectory energy dissipation and underflow energy dissipation tanks are generally used. The trajectory energy dissipation has great influence on the safety of a downstream slope and the safety of a building due to flood discharge atomization and pit depth; the energy dissipation of the bottom flow stilling pool causes the height of an excavation slope due to the long length and the large digging depth of the stilling pool, and the construction difficulty and the engineering investment are large.
As shown in fig. 1, in the prior art drift sill at the bank spillway/spillway exit, a drift sill body 20 is constructed on an outer side wall 22 extending along the terrain near the bank/spillway exit and an inner side wall 21 close to the river channel, and the reverse arc section of the drift sill is directly connected with the spillway. The continuous flip bucket has a simple structure, the water flow smoothly falls into the downstream, but in narrow river valleys or other terrain-limited zones, the water tongue can wash the downstream bank slope, so the water jet inflow position needs to be controlled.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a broken line formula flip bucket of bank spillway/flood discharge hole export, can shorten the flip bucket length and can reduce the low reaches and dash the hole degree of depth again.
In order to solve the technical problem, the utility model discloses a technical scheme is: a fold line type flip bucket at the outlet of a bank spillway/flood discharge hole comprises a flip bucket main body arranged between an outer side wall and an inner side wall, wherein the flip bucket main body comprises a flat bottom section, a reverse arc section, a gap section along the water flow direction, a flip bucket oblique section along the oblique water flow direction and a flip bucket top section along the vertical water flow direction; the top of the deflecting flow nose ridge is provided with a vertical water flow direction deflecting flow nose ridge top section close to the outer side wall, the vertical water flow direction deflecting flow nose ridge top section is connected with the gap section along the water flow direction through an inclined water flow direction deflecting flow nose ridge inclined section, so that water flows to the riverbed from the side direction during small discharge, and the water tongue is pulled out in a longitudinal fan shape during medium and large discharge to enter water along the main riverway.
The length L1 of the notch in the water flow direction is 1/2-1/3 of the length B of the inner flip bucket.
And an included angle alpha between the inclined section of the flip bucket in the inclined water flow direction and the axial line of the spillway/flood discharge tunnel is 45-75 degrees.
The length L2 of the top section of the flip bucket in the vertical water flow direction is 1/6-1/7 of the width of the flip bucket.
The utility model has the advantages that: the utility model discloses can fully dissipate energy, can shorten nose bank length again, solve the scour protection problem of the flowing water tongue of choosing down main trough and low reaches river course under this topography condition. The damage and the influence on the downstream spillway or the outlet bank slope of the flood discharge tunnel are reduced, and the construction difficulty and the engineering quantity are reduced.
Drawings
Fig. 1 is a three-dimensional structure diagram of a flip bucket at the outlet of a bank spillway/spillway tunnel in the prior art.
Fig. 2 is a three-dimensional structure diagram of the folding-line type flip bucket at the outlet of the bank spillway/flood discharge tunnel of the utility model.
Fig. 3 is a plan view of the fold-line type flip bucket at the outlet of the bank spillway/flood discharge tunnel of the present invention.
Detailed Description
The invention is explained in more detail below with reference to specific embodiments and the accompanying drawings:
as shown in fig. 2 and 3, the fold-line flip bucket for the bank spillway/flood discharge hole outlet of the present invention comprises a flip bucket main body arranged between an outer side wall 2 and an inner side wall 1, wherein the flip bucket main body comprises a flat bottom section 3, an inverse arc section 4, a gap section 6 along the water flow direction, a flip bucket inclined section 7 along the oblique water flow direction and a flip bucket top section 8 along the vertical water flow direction, the flat bottom section 3 is connected with a discharge chute 10, the inverse arc section 4 is located at the downstream of the flat bottom section 3, the top end of the inner side wall 1 is terminated on the flat bottom section 3, and the flat bottom section 3 at the downstream of the top end of the inner side wall 1 is added with the inverse arc section 4 to form a gap section 6 along the water flow direction without a side wall; close to the outer side wall 2, a section of vertical water flow direction deflecting flow bucket top section 8 is reserved at the top of the deflecting flow bucket, the vertical water flow direction deflecting flow bucket top section 8 is connected with the downstream direction gap section 6 through an inclined water flow direction deflecting flow bucket inclined section 7, so that water flows to a river bed from the side direction during small discharge, and a water tongue is longitudinally pulled out in a fan shape during medium and large discharge to enter water along a main river channel.
The length L1 of the gap section 6 along the water flow direction is 1/2-1/3 of the length B of the inner flip bucket.
The inclined section 7 of the flip bucket in the inclined water flow direction and the axis 9 of the spillway/flood discharge tunnel form an included angle alpha of 45-75 degrees.
The length L2 of the top section 8 of the flip bucket in the vertical water flow direction is 1/6-1/7 of the width of the flip bucket.
The utility model discloses an export at bank edge spillway or flood discharge hole sets up broken line formula flip bucket, can solve during little discharge rivers and can't play to choose and form the water jump in the nose bank section, carry the rubble then can lead to the fact the abrasion to the nose bank under the arm in the rivers of sluicing to fall rivers and cause the elutriation of nose bank basis easily after jumping, probably endanger the safety of spillway or flood discharge hole export. When the water is discharged in a large amount, the water tongue is longitudinally pulled open in a fan shape and smoothly enters the main river channel, so that the scouring of the downstream bank slope is reduced, the pit flushing depth is reduced, and the flood discharge atomization is reduced. The utility model discloses can fully dissipate energy, can shorten nose bank length again, solve the scour protection problem of the flowing water tongue of choosing down main trough and low reaches river course under this topography condition. The damage and the influence on the downstream spillway or the outlet slope of the flood discharge tunnel are reduced, and the construction difficulty and the engineering quantity are reduced.
In a small reservoir hub project, a dam is a homogeneous earth dam, and the maximum dam height is 39 m. The open type single-hole spillway is adopted for flood discharge, the weir water head is 3.4m, the check flood discharge rate is 201m3/s, and the design flood discharge rate is 91m 3/s. Influenced by topography, the length of the arrangement of the energy dissipation section at the outlet is limited, the slope is high and steep, if underflow energy dissipation is adopted, a downstream riverbed is protected, a longer stilling basin needs to be arranged, and the earth and stone excavation amount and the concrete volume are larger. The jet flow energy dissipation is adopted, the position, the range and the flow distribution of the jet flow falling into a downstream riverbed are effectively controlled, the structure is simple, the construction and the maintenance are convenient, the work amount is small, but the downstream erosion is serious, and the atomization is large.
Therefore, adopt the utility model discloses a broken line formula bucket of choosing to flow, adopt along with rivers direction, oblique water flow direction, perpendicular rivers direction will choose the bucket of flowing in the same direction as the cutting of the bucket, rivers flow to the riverbed from the side direction when making little discharge, and the tongue of swimming vertically pulls open during middle and big discharge, goes into water along with main river course. The main river channel is reduced in the depth of the pit, and the bank slope is prevented from being washed by water flow in a large flow.
The above-mentioned embodiments are only used for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, the scope of the present invention should not be limited by the embodiment, that is, all equivalent changes or modifications made by the spirit of the present invention should still fall within the scope of the present invention.
Claims (4)
1. A fold line type flip bucket of a bank spillway/flood discharge hole outlet is characterized in that a flip bucket main body arranged between an outer side wall (2) and an inner side wall (1) comprises a flat bottom section (3), a reverse arc section (4), a gap section (6) along the water flow direction, a flip bucket inclined section (7) along the oblique water flow direction and a flip bucket top section (8) along the vertical water flow direction, the flat bottom section (3) is connected with a discharge groove (10), the reverse arc section (4) is positioned at the downstream of the flat bottom section (3), the top end of the inner side wall (1) is terminated on the flat bottom section (3), and the flat bottom section (3) at the downstream of the top end of the inner side wall (1) is added with the reverse arc section (4) to form a gap section (6) without a side wall along the water flow direction; close to outside boundary wall (2), leave one section perpendicular rivers direction at the top of the flip bucket and flip the bucket top segment (8), the perpendicular rivers direction flip bucket top segment (8) with along the connection of oblique rivers direction flip bucket oblique section (7) between rivers direction breach section (6), rivers flow to the riverbed from the side direction during messenger's little discharge, the vertical fan-shaped pulling open of water tongue during medium, big discharge is gone into water along main river course.
2. The fold-line flip bucket for the bank spillway/spillway exit according to claim 1, wherein the length L1 of the cut-out section (6) along the water flow direction is 1/2-1/3 of the length B of the inner flip bucket.
3. The bank spillway/spillway tunnel outlet fold-line flip bucket according to claim 1, wherein an angle α between an inclined section (7) of the flip bucket with the inclined water flow direction and an axis (9) of the spillway/spillway tunnel is 45-75 °.
4. The fold-line flip bucket for the bank spillway/spillway exit according to claim 1, wherein the length L2 of the top section (8) of the flip bucket in the vertical water flow direction is 1/6-1/7 of the width of the flip bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921476515.3U CN211256912U (en) | 2019-09-05 | 2019-09-05 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921476515.3U CN211256912U (en) | 2019-09-05 | 2019-09-05 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
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| CN211256912U true CN211256912U (en) | 2020-08-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593221A (en) * | 2019-09-05 | 2019-12-20 | 中国电建集团北京勘测设计研究院有限公司 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
| CN111945682A (en) * | 2020-09-14 | 2020-11-17 | 大连理工大学 | Energy dissipation pool with inverted triangular wedge tail pier |
-
2019
- 2019-09-05 CN CN201921476515.3U patent/CN211256912U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110593221A (en) * | 2019-09-05 | 2019-12-20 | 中国电建集团北京勘测设计研究院有限公司 | Fold-line type flip bucket at outlet of bank spillway/flood discharge tunnel |
| CN111945682A (en) * | 2020-09-14 | 2020-11-17 | 大连理工大学 | Energy dissipation pool with inverted triangular wedge tail pier |
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