CN212335944U

CN212335944U - Asymmetric steering contraction differential flip bucket body type

Info

Publication number: CN212335944U
Application number: CN202020130689.0U
Authority: CN
Inventors: 郑道宽; 卢建华; 彭文祥
Original assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Current assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-01-12
Anticipated expiration: 2030-01-20

Abstract

The utility model relates to a hydraulic and hydroelectric engineering sluicing energy dissipation field discloses an asymmetric differential flip body type that turns to that contracts, including flip bucket section main part, flip bucket section main part includes flip bucket basis and is located flip bucket side wall and lean on riverbed side flip bucket side wall on the flip bucket basis, lean on the flip bucket side wall to turn to being close to flip bucket section main part rivers direction axis along the rivers direction, lean on riverbed side flip bucket side wall to turn to keeping away from flip bucket section main part rivers direction axis along the rivers direction, flip bucket basis is located the flip bucket side wall and lean on to have arranged first high bank, first low bank, second high bank and second low bank in proper order between the riverbed side flip bucket side wall, first high bank and first low bank turn to the riverbed direction shrinkage along the rivers direction. The utility model discloses asymmetric shrink differential flip bank size that turns to, the energy dissipation effect is better, and the fluidic position and the scope of falling into water of effective control can be better reaches protection bank slope and alleviates the purpose that erodees the river course.

Description

Asymmetric steering contraction differential flip bucket body type

Technical Field

The utility model relates to a hydraulic and hydroelectric engineering sluices the energy dissipation field, concretely relates to asymmetric shrink differential flip bucket size that turns to.

Background

In a hydraulic and hydroelectric engineering hub, a water discharge building must be arranged for discharging flood which cannot be contained in reservoir capacity, preventing the flood from overflowing over the top of a dam and ensuring the safety of the dam.

For an earth-rock dam, overflow or a large amount of overflow from the dam body is generally not allowed, or when the river valley is narrow and the discharge amount is large, and when all flood is difficult to discharge through the concrete dam, a shoreside spillway or a drainage tunnel needs to be built at the shoreside or the natural bealock position.

As a common drainage structure, the spillway should have sufficient drainage capacity and ensure its safety and proper connection between the drainage flow and the river flow.

With the rapid development of dam construction, the flood discharge energy dissipation technology has a lot of new progresses, wherein the trajectory energy dissipation development is rapid, and the trajectory energy dissipation technology becomes a main energy dissipation measure of medium-high water head and large single wide flow discharge buildings. In recent years, new energy dissipaters are continuously appeared, and the current shoreside type water release structure trajectory jet energy dissipater mainly comprises: continuous threshold, differential threshold, oblique flip threshold, twisted threshold, etc. Because the downward discharge water flow often has the characteristics of high water head, large flow velocity and concentrated water strands, the energy is large, if the downward discharge water flow is not properly treated, the downstream river bed and the bank slope can be seriously washed, even the bank slope collapses, and the stability and the safety of a dam, a discharge building and the like are further endangered. Therefore, the key of the drainage building adopting the trajectory energy dissipation mode is to select a proper flip bucket body type, eliminate partial energy of jet flow as much as possible in the air and effectively control the position, range and flow distribution of the jet flow falling into a downstream riverbed. In the construction of hydraulic and hydroelectric engineering, conditions such as different engineering hub arrangement, topographic and geological conditions, water release structure arrangement, hydrology and application are varied, so that the application range and the effect of the flip bucket body type have certain limitations, and ideal requirements and energy dissipation effects cannot be achieved sometimes. If limited by hub arrangement and topographic and geological conditions, due to the reasons of large single-width discharge capacity, difficult arrangement of the outlet of a bank-type water release structure, narrow downstream river channel and the like, the axis of the outlet of the water release structure can only intersect with a downstream bank slope at a small angle, but under the condition that the downstream bank slope and the riverbed have poor anti-scouring capacity, the existing trajectory energy dissipater type cannot achieve the ideal effect, so that the system cannot sufficiently dissipate energy in the air, cannot effectively control the position and range of jet flow falling into the downstream riverbed, cannot well protect the downstream bank slope close to a mountain side and reduce scouring on the riverbed.

Disclosure of Invention

The utility model discloses an aim at be exactly not enough to above-mentioned technique, provide an asymmetric shrink differential flip bucket size that turns to, the energy dissipation effect is better, can the fluidic position and the scope of falling into water of effective control, can be better reach the protection bank slope and alleviate the purpose to the river course erodees.

In order to realize the above object, the utility model discloses an asymmetric shrink differential flip bucket size that turns to, including flip bucket section main part, flip bucket section main part's initiating terminal links up with the upper reaches let-off groove end, flip bucket section main part includes flip bucket basis and is located flip bucket is basic on lean on mountain side flip bucket side wall and lean on riverbed side flip bucket side wall, the flip bucket basis is lower mark's concrete to maintain the stability of flip energy dissipation section, lean on mountain side flip bucket side wall to be close to along the rivers direction flip bucket section main part rivers direction axis turns to, lean on riverbed side flip bucket side wall to keeping away from along the rivers direction flip bucket section main part rivers direction axis turns to, just the steering angle who leans on mountain side flip bucket side wall is greater than lean on the steering angle of riverbed side flip bucket side wall, the flip bucket basis is located first high bank side wall and lean on between the riverbed side flip bucket side wall have been arranged in proper order, First low bank, the low bank of second high bank and second, just first high bank and first low bank are located flip bucket section main part rivers direction axis lean on the mountain side, the low bank of second high bank and second is located flip bucket section main part rivers direction axis lean on the riverbed side, first high bank and first low bank are followed rivers direction and are turned to riverbed direction shrink, lean on mountain side flip bucket boundary wall, lean on riverbed side flip bucket boundary wall, first high bank, first low bank, the low bank of second high bank and second and pass through flip bucket basis supports.

Preferably, the second high bank contracts along the water flow direction, so that the jet flow of the second high bank and the jet flow of the first low bank are fully mixed in the air for collision energy dissipation, and the second low bank diffuses and turns to the river bed direction along the water flow direction, so that the reduction amplitude of the total width of the outlet bank is smaller, and the single width flow of the outlet water is not excessively increased.

Preferably, the steering angle of the first high bank on the hill side is greater than the steering angle of the first high bank on the river bed side, and the steering angle of the first low bank on the hill side is greater than the steering angle of the first low bank on the river bed side.

Preferably, the turning angles of the first high sill and the first low sill decrease in sequence along the water flow direction.

Preferably, the turning angle of the flip threshold side wall close to the hill is the same as the turning angle of the flip threshold side wall close to the hill of the first high bank, and the turning angle of the flip threshold side wall close to the riverbed side is the same as the turning angle of the flip threshold side wall close to the riverbed side of the second low bank.

Preferably, the thickness of the side wall of the flip bucket close to the mountain side is kept constant, and the thickness of the side wall of the flip bucket close to the river bed is kept constant.

Preferably, the turning angle of the flip bucket side wall close to the mountain side is smaller than 8 degrees, the reduced outflow width of the outlet end of the flip bucket section main body is not more than 10 percent, and the small increase amplitude of the single width flow is ensured.

Preferably, the side wall of the flip bucket close to the mountain side, the side wall of the flip bucket close to the riverbed side, the first high bank, the first low bank, the second high bank and the second low bank are all of reinforced concrete structures.

Preferably, the distance between the side wall of the flip bucket close to the mountain and the side wall of the flip bucket close to the river bed gradually decreases from upstream to downstream, so that the outlet width of the flip bucket is slightly smaller than the inlet width.

Preferably, the second high sill is contracted and turned towards the direction of the river bed along the water flow direction, and the second low sill is contracted and turned towards the direction of the river bed along the water flow direction.

Compared with the prior art, the utility model, have following advantage:

1. the jet flow is asymmetrically turned and contracted along the flow path, so that certain turning occurs after the jet flow is lifted away from the bucket, aeration, diffusion and mutual mixing and collision of water particles in the air are enhanced, partial energy of the jet flow can be well reduced in the air, the position and the range of the jet flow falling into a downstream riverbed can be effectively controlled, the purposes of protecting a downstream bank slope close to a mountain side and reducing the erosion of a river channel are achieved, and meanwhile, the jet flow plays a good role in stabilizing and safety of the jet flow and adjacent buildings;

2. the flip bucket body is simple, breaks through the conventional oblique flip bucket (or twisted bucket) and differential flip bucket body, integrates the advantages of the flip buckets, can better adapt to the unfavorable conditions possibly encountered when the shoreside type water outlet building adopts the trajectory energy dissipation, has better energy dissipation effect, can effectively control the water falling position and range of jet flow, can better achieve the purposes of protecting a bank slope and lightening the erosion of a river channel, correspondingly reduces the engineering quantity of protecting a downstream riverbed and the bank slope, and saves the investment;

3. the method has the characteristics of good adaptability, high efficiency, safety, economy and the like, and promotes the development of the trajectory energy dissipation technology of the water release structure to a certain extent.

Drawings

Fig. 1 is a schematic plan view of the asymmetric steering and contracting differential flip-bucket body of the present invention;

fig. 2 is a schematic structural view of the asymmetric steering and contracting differential flip-bucket body of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1 (longitudinal cross-section taken in the direction of water flow);

fig. 4 is a cross-sectional view taken along line B-B of fig. 1 (cross-section taken along the kam threshold).

The components in the figures are numbered as follows:

the flip bucket comprises a flip bucket foundation 1, a backer side flip bucket side wall 2, a riverbed side flip bucket side wall 3, a first high bucket 4, a first low bucket 5, a second high bucket 6 and a second low bucket 7.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

As shown in figures 1, 2, 3 and 4, the asymmetric turning and contracting differential flip bucket body of the invention comprises a flip bucket section main body, the starting end of the flip bucket section main body is connected with the end of an upstream chute, the flip bucket section main body comprises a flip bucket foundation 1, a side flip bucket side wall 2 close to the flip bucket section main body along the water flow direction and a side flip bucket side wall 3 close to the riverbed side flip bucket side wall 3, the side flip bucket side wall 2 close to the flip bucket section main body along the water flow direction turns to the central axis far away from the flip bucket section main body along the water flow direction, the turning angle of the side flip bucket side wall 2 close to the riverbed side flip bucket side wall 3 is larger than that of the side flip bucket side wall 3, a first high bucket 4, a first low bucket 5, a second high bucket 6 and a second low bucket 7 are arranged between the side flip bucket side wall 2 close to the riverbed side flip bucket side flip bucket side wall 3 of the flip bucket foundation 1, and the first high bucket 4 and the side flip bucket side main body close to the riverbed side flip bucket side wall 3 are arranged in sequence, the second high bank 6 and the second low bank 7 are located on the side close to the riverbed of the central axis of the flip bucket section main body in the water flow direction, and the first high bank 4 and the first low bank 5 shrink and turn to the riverbed direction along the water flow direction.

In addition, the second high sill 6 contracts along the water flow direction, the second low sill 7 diffuses and turns along the water flow direction to the riverbed direction, the turning angle of the first high sill 4 close to the side of the mountain is larger than the turning angle of the first high sill 4 close to the riverbed side, the turning angle of the first low sill 5 close to the side of the mountain is larger than the turning angle of the first low sill 5 close to the riverbed side, and the turning angles of the first high sill 4 and the first low sill 5 are sequentially reduced progressively along the water flow direction.

In this embodiment, the turning angle of the backer side flip edge wall 2 is the same as the turning angle of the first high bank 4 on the top side, the turning angle of the riverbed side flip edge wall 3 is the same as the turning angle of the second low bank 7 on the riverbed side, the thickness of the backer side flip edge wall 2 is kept constant, the thickness of the riverbed side flip edge wall 3 is kept constant, the distance between the backer side flip edge wall 2 and the riverbed side flip edge wall 3 is gradually reduced from the upstream to the downstream, the turning angle of the backer side flip edge wall 2 is smaller than 8%, and the reduced outflow width of the flip segment main body outlet end is not more than 10%.

In this embodiment, the hill-side flip bucket side wall 2, the riverbed-side flip bucket side wall 3, the first high sill 4, the first low sill 5, the second high sill 6, and the second low sill 7 are all of a reinforced concrete structure.

In other embodiments, the second high sill 6 can be contracted and turned towards the riverbed direction along the water flow direction, and the second low sill 7 is contracted and turned towards the riverbed direction along the water flow direction.

When the present embodiment is used, those skilled in the art can change, adjust and optimize the flip body shape by combining the practical engineering situation without departing from the principles and design concepts of the present invention. The clear width of the initial section of the flip bucket section, the arrangement and the number of the high bucket and the low bucket and the arrangement on the left side and the right side of the axis are determined according to the specific conditions of the engineering.

In addition, the differential flip bucket steering angle, the maximum steering angle of the side wall 2 of the flip bucket on the backer side should not exceed 8 degrees, the turning angles of the flip bucket on the backer side towards the central axis direction of the main body water flow direction of the flip bucket section should be gradually decreased, the axis towards the direction of the riverbed, whether the flip bucket is turned, contracted or diffused or not should be determined according to the actual conditions of engineering, the energy dissipation effect is ensured, and the jet flow is effectively controlled to fall into the ideal position and range of the downstream riverbed. Meanwhile, the differential flip bucket is totally contracted in a steering mode, the contraction width is not too large, the reduced outflow width is not more than 10%, and the small increase amplitude of the single width flow is ensured. When the asymmetric steering shrinkage differential flip bucket is adopted for flip flow energy dissipation of a water release structure in actual engineering, the arrangement and the body shape of the flip bucket are reasonably determined by combining a hydraulic model test, so that an ideal effect is achieved.

The utility model discloses asymmetric steering shrink differential flip bank size, along the asymmetric steering shrink of flow path, make the efflux choose take place certain steering after the bucket, aerify in the air, the diffusion, the mutual mingling collision of water particle is strengthened, the partial energy of efflux can be better can subduct in the air, and can effectively control the position, the scope that the efflux falls into low reaches riverbed, reached and protected the low reaches lean on the mountain side bank slope and alleviateed the purpose of washing away the river course, can play better effect to its own and the stability and the safety homoenergetic of adjacent building simultaneously; in addition, the flip bucket body is simple, breaks through the conventional inclined flip bucket (or twisted bucket) and differential flip bucket body, integrates the advantages of the flip buckets, can better adapt to the unfavorable conditions possibly encountered when the shoreside type water outlet building adopts the trajectory energy dissipation, has better energy dissipation effect, can effectively control the water falling position and range of jet flow, can better achieve the purposes of protecting the bank slope and lightening the erosion of the river channel, correspondingly reduces the engineering amount of protecting the downstream riverbed and the bank slope, and saves the investment; the utility model has the characteristics of adaptability is good, high-efficient, safety, economy etc, promoted the development of the water release structure trajectory energy dissipation technique to a certain extent.

Claims

1. The utility model provides an asymmetric differential flip bucket size that turns to of shrink, includes flip bucket section main part, the initiating terminal and the upper reaches of flip bucket section main part let out the groove end and link up its characterized in that: the flip bucket section main body comprises a flip bucket foundation (1), and a flip bucket side wall (2) and a flip bucket side wall (3) which are positioned on the flip bucket foundation (1), the flip bucket side wall (2) is close to the central axis of the flip bucket section main body water flow direction along the water flow direction, the flip bucket side wall (3) is far away from the central axis of the flip bucket section main body water flow direction along the water flow direction, the steering angle of the flip bucket side wall (2) is larger than that of the flip bucket side wall (3), the flip bucket foundation (1) is positioned between the flip bucket side wall (2) and the flip bucket side wall (3) and is sequentially provided with a first high bucket (4), a first low bucket (5), a second high bucket (6) and a second low bucket (7), and the first high bucket (4) and the first low bucket (5) are positioned on the flip bucket side of the flip bucket side wall, the flip bucket side wall (3) is positioned on the flip bucket side of the flip bucket side, and is positioned on the flip bucket side of, the second high sill (6) and the second low sill (7) are located on the side, close to the riverbed, of the central axis of the main body of the flip bucket in the water flow direction, and the first high sill (4) and the first low sill (5) shrink and turn in the direction of the riverbed along the water flow direction.

2. The asymmetric steering, retracting and differential flip-flop of claim 1, wherein: the second high threshold (6) shrinks along the water flow direction, and the second low threshold (7) diffuses and turns to the riverbed direction along the water flow direction.

3. The asymmetric steering, retracting and differential flip-flop of claim 2, wherein: the steering angle of the first high sill (4) close to the mountain side is larger than that of the first high sill (4) close to the river bed side, and the steering angle of the first low sill (5) close to the mountain side is larger than that of the first low sill (5) close to the river bed side.

4. The asymmetric steering, retracting and differential flip-flop of claim 3, wherein: the steering angles of the first high threshold (4) and the first low threshold (5) are sequentially decreased progressively along the water flow direction.

5. The asymmetric steering, retracting and differential flip-flop of claim 4, wherein: the turning angle of the flip bucket side wall (2) close to the mountain is the same as that of the first high bank (4) close to the mountain, and the turning angle of the flip bucket side wall (3) close to the riverbed is the same as that of the second low bank (7) close to the riverbed.

6. The asymmetric steering, retracting and differential flip-flop of claim 5, wherein: the thickness of the flip bucket side wall (2) close to the mountain side is kept unchanged, and the thickness of the flip bucket side wall (3) close to the riverbed side is kept unchanged.

7. The asymmetric steering, retracting and differential flip-flop of claim 6, wherein: the turning angle of the side wall (2) of the flip bucket close to the mountain side is smaller than 8 degrees, and the reduced outflow width of the outlet end of the main body of the flip bucket section is not more than 10 percent.

8. The asymmetric steering, retracting and differential flip-flop of claim 7, wherein: the side wall (2) of the flip bucket close to the mountain side, the side wall (3) of the flip bucket close to the riverbed side, the first high bank (4), the first low bank (5), the second high bank (6) and the second low bank (7) are all of reinforced concrete structures.

9. The asymmetric steering, retracting and differential flip-flop of claim 8, wherein: the distance between the side flip bucket side wall (2) close to the mountain and the side flip bucket side wall (3) close to the river bed is gradually reduced from the upstream to the downstream.

10. The asymmetric steering, retracting and differential flip-flop of claim 1, wherein: the second high sill (6) shrinks and turns to the direction of the riverbed along the water flow direction, and the second low sill (7) shrinks and turns to the direction of the riverbed along the water flow direction.