Dispersing flip bucket structure for channel

Abstract

A channel dispersing flip bucket structure comprises an upper-layer flip bucket, a lower-layer flip bucket and a lower-layer channel. The upper-layer flip bucket comprises an upper-layer channel, and an upper drainage wall is arranged on the edge of the upper-layer channel; the lower-layer flip bucket is provided with a descending ramp, one end of the descending ramp is connected with an outlet of the drainage channel, and the other end of the descending ramp is connected with the lower-layer channel; and a lower drainage wall is arranged on the edge of the lower-layer channel. The upper channel and the descending ramp are the same in width. The height of the lower drainage wall is the same as the descending height of the descending ramp. The upper-layer channel is longer than the descending ramp. The gradient of the descending ramp is larger than that of the drainage channel outlet channel. The gradient of the lower-layer channel is the same as that of the drainage channel outlet channel. The original flip bucket with a single drop point is divided into an upper flip bucket and a lower flip bucket, so that one water tongue is spatially divided into a plurality of water tongues, and the water tongues flip at different positions, so that the single drop point is changed into a plurality of drop points, and the scouring effect of a downstream riverbed is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of flood discharge and energy dissipation in water conservancy and hydropower engineering, and specifically relates to a channel dispersed diversion sill structure. Background Art

[0002] In water conservancy and hydropower projects, diverting flow energy dissipation is the most widely used form of energy dissipation. Especially with the accelerated pace of high dam construction in China, the application of diverting flow energy dissipation is becoming more and more common.

[0003] For general spillways or spillways, a certain size of diversion bank is often set at the end of the channel to disperse the water into the downstream river as much as possible, thereby reducing the scouring effect of the riverbed. In particular, with the improvement of dam construction technology in recent years, various diversion banks such as dovetail bank and bevel bank have emerged, which can effectively disperse the water flow point.

[0004] However, all the diversion dams in the current engineering community have a common feature, that is, the upstream flow is uniformly diverted from the end of the channel, and the water tongue landing point is relatively concentrated. The idea of ​​adjusting the diversion dam body is only to disperse the water tongue landing point as much as possible within a limited space. How to find a new way to find a diversion dam that can efficiently disperse the water flow is a question worth thinking about.

[0005] Therefore, how to develop a modular dual-parallel leg structure with simple structure, easy control, strong carrying capacity, strong terrain adaptability and flexible movement becomes a problem that needs to be solved. Utility Model Content

[0006] To this end, the utility model provides a channel dispersed diversion sill structure, so that the diversion sill originally at a single landing point is divided into an upper and lower form, so that a stream of water is divided into multiple streams in space and is ejected at different positions, thereby turning a single landing point into multiple landing points, effectively reducing the scouring effect of the downstream riverbed.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a channel dispersed flow diversion sill structure, comprising an upper flow diversion sill, a lower flow diversion sill and a lower channel;

[0008] The upper diversion sill includes an upper channel, and an upper diversion wall is arranged on the side of the upper channel;

[0009] The lower diversion sill is provided with a descending ramp, one end of the descending ramp is connected to the outlet of the drainage channel, and the other end of the descending ramp is connected to the lower channel; a lower drainage wall is provided on the side of the lower channel.

[0010] As a preferred solution for a channel-dispersed diversion ramp structure, the width of the upper channel is the same as that of the descending ramp.

[0011] As a preferred solution for the channel dispersion diversion sill structure, the height of the lower diversion wall is the same as the descending height of the descending ramp.

[0012] As a preferred solution for a channel-dispersed diversion ramp structure, the length of the upper channel is greater than the length of the descending ramp.

[0013] As a preferred solution for a channel dispersed diversion ramp structure, the slope of the descending ramp is greater than the slope of the outlet channel of the spillway.

[0014] As a preferred solution for a channel dispersed diversion sill structure, the slope of the lower channel is the same as the slope of the outlet channel of the spillway.

[0015] As a preferred solution for a channel dispersed diversion bank structure, the ends of the upper diversion wall and the lower diversion wall are both arc-shaped, the upper diversion wall is used to change the water flow direction of the upper diversion bank; the lower diversion wall is used to change the water flow direction of the lower channel.

[0016] The utility model has the following advantages: it comprises an upper diverting sill, a lower diverting sill and a lower channel; the upper diverting sill comprises an upper channel, and an upper drainage wall is arranged on the side of the upper channel; the lower diverting sill is provided with a descending ramp, one end of the descending ramp is connected to the outlet of the drainage channel, and the other end of the descending ramp is connected to the lower channel; a lower drainage wall is arranged on the side of the lower channel. The width of the upper channel is the same as that of the descending ramp. The height of the lower drainage wall is the same as the descending height of the descending ramp. The length of the upper channel is greater than the length of the descending ramp. The slope of the descending ramp is greater than the slope of the outlet channel of the drainage channel. The slope of the lower channel is the same as the slope of the outlet channel of the drainage channel. The ends of the upper drainage wall and the lower drainage wall are both arc-shaped, and the upper drainage wall is used to change the water flow direction of the upper diverting sill; the lower drainage wall is used to change the water flow direction of the lower channel. The utility model divides the diversion sill with a single landing point into upper and lower parts, so that a water tongue is divided into multiple parts in space and is ejected at different positions, thereby turning the single landing point into multiple landing points, effectively reducing the scouring effect of the downstream riverbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1A schematic diagram of a channel dispersion diversion sill structure provided in an embodiment of the utility model;

[0019] Figure 2 A structural top view of a channel dispersion diversion sill structure provided in an embodiment of the utility model;

[0020] Figure 3 A structural side view of a channel dispersion diversion sill structure provided in an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of a traditional diverter sill and a water tongue landing point in a channel dispersed diverter sill structure provided in an embodiment of the utility model;

[0022] Figure 5 A schematic diagram of a water tongue landing point in a channel dispersed diversion sill structure provided in an embodiment of the utility model;

[0023] Figure 6 It is a schematic diagram of the structure of a multi-layer dispersed flow diversion sill in a possible embodiment provided in the embodiment of the utility model.

[0024] In the figure, 1. upper diversion bank; 2. lower diversion bank; 3. upper channel; 4. upper drainage wall; 5. descending ramp; 6. lower channel; 7. lower drainage wall. DETAILED DESCRIPTION

[0025] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1 , Figure 2 and Figure 3 The embodiment of the utility model provides a channel dispersed flow diversion sill structure, including an upper flow diversion sill 1, a lower flow diversion sill 2 and a lower channel 6;

[0027] The upper diversion sill 1 includes an upper channel 3, and an upper diversion wall 4 is provided on the side of the upper channel 3;

[0028] The lower diversion sill 2 is provided with a descending ramp 5, one end of the descending ramp 5 is connected to the outlet of the drainage channel, and the other end of the descending ramp 5 is connected to the lower channel 6; a lower drainage wall 7 is provided on the side of the lower channel 6.

[0029] Specifically, the water flow is divided into two in the middle at the outlet of the spillway, one part of the channel still maintains the original slope, and the other part of the water flows into the lower channel 6 under the action of the descending ramp 5, so that the original water flow is divided into two, or three or more; at the same time, the lower channel 6 is further extended downstream, so that the two water flows will not cross each other, thereby comparing with the single water tongue of the traditional diversion ridge, such as Figure 4 As shown in Figure 2, the landing points of the multi-layer dispersed diversion embankment become two or more, such as Figure 5 shown.

[0030] In this embodiment, the width of the upper channel 3 is the same as that of the descending ramp 5 .

[0031] For details, see Figure 2 , by setting the upper channel 3 and the descending ramp 5 to the same width, that is, B 2 =B 1 . Ensure that the water flow in the two channels is consistent, and the impact force of the water house formed is also the same, ensuring the scouring effect. If a three-layer or more layer design is adopted, the width of the three or more channels is still the same.

[0032] In this embodiment, the height of the lower drainage wall 7 is the same as the descending height of the descending ramp 5 .

[0033] The descending ramp 5 and the lower drainage wall 7 are designed to have the same height, which can ensure that the water flow will not overflow from the side of the lower drainage wall 7.

[0034] At the same time, in order to prevent the upper water flow from falling into the lower layer under the action of the upper drainage wall 4, see Figure 2 , Figure 3 , the height H of the lower drainage wall 7 should meet the following requirements:

[0035] H>B 2 2 / (4h)

[0036] Where, H is the height of the lower drainage wall 7; B 2 is the width of the descending ramp 5; h is the depth of water flow in the channel.

[0037] In this embodiment, the length of the upper channel 3 is greater than the length of the descending ramp 5 .

[0038] See also Figure 2 , the length of the upper channel 3 is L 1 Greater than the length L of the descending ramp 5 2 , the specific calculation formula is:

[0039] L 2 =(0.6~0.9)L 1

[0040] The length L of the lower channel 6 3 The calculation formula is:

[0041] L 3 =(0.8~1.2)L 1

[0042] In this embodiment, the slope of the descending ramp 5 is greater than the slope of the outlet channel of the drainage channel.

[0043] For details, see Figure 3 , the slope i of the descending ramp 5 2 Greater than the slope i of the outlet channel of the spillway 1 , the calculation formula is:

[0044] i 2 =(1.1~1.6)i 1 .

[0045] In this embodiment, the slope of the lower channel 6 is the same as the slope of the outlet channel of the drainage channel.

[0046] In this embodiment, the ends of the upper drainage wall 4 and the lower drainage wall 7 are both arc-shaped. The upper drainage wall 4 is used to change the water flow direction of the upper diversion bank 1; the lower drainage wall 7 is used to change the water flow direction of the lower channel 6.

[0047] In a possible embodiment, a multi-layer dispersed flow diversion ridge design is also provided, such as Figure 6 As shown, the upper embankment is longer than the lower embankment, which can also form multiple water tongues to fall to the ground, thus increasing the scouring effect.

[0048] In summary, the utility model comprises an upper diverting sill 1, a lower diverting sill 2 and a lower channel 6; the upper diverting sill 1 comprises an upper channel 3, and an upper drainage wall 4 is arranged on the side of the upper channel 3; the lower diverting sill 2 is provided with a descending ramp 5, one end of the descending ramp 5 is connected to the outlet of the drainage channel, and the other end of the descending ramp 5 is connected to the lower channel 6; a lower drainage wall 7 is arranged on the side of the lower channel 6. The width of the upper channel 3 is the same as that of the descending ramp 5. The height of the lower drainage wall 7 is the same as the descending height of the descending ramp 5. The length of the upper channel 3 is greater than the length of the descending ramp 5. The slope of the descending ramp 5 is greater than the slope of the drainage channel outlet channel. The slope of the lower channel 6 is the same as the slope of the drainage channel outlet channel. The ends of the upper diversion wall 4 and the lower diversion wall 7 are both arc-shaped, and the upper diversion wall 4 is used to change the water flow direction of the upper diversion wall 1; the lower diversion wall 7 is used to change the water flow direction of the lower channel 6. The utility model divides the diversion wall with a single landing point into upper and lower separated forms, so that a stream of water is divided into multiple streams in space and is ejected at different positions, thereby turning a single landing point into multiple landing points, effectively reducing the scouring effect of the downstream riverbed.

[0049] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A channel dispersed diversion sill structure, characterized in that: It includes an upper diversion sill (1), a lower diversion sill (2) and a lower channel (6); The upper diversion sill (1) comprises an upper channel (3), and an upper drainage wall (4) is arranged on the side of the upper channel (3); The lower diversion sill (2) is provided with a descending ramp (5), one end of the descending ramp (5) is connected to the outlet of the drainage channel, and the other end of the descending ramp (5) is connected to the lower channel (6); a lower drainage wall (7) is provided on the side of the lower channel (6).

2. A channel dispersion diversion sill structure according to claim 1, characterized in that: The width of the upper channel (3) is the same as that of the descending ramp (5).

3. A channel dispersion diversion sill structure according to claim 2, characterized in that: The height of the lower drainage wall (7) is the same as the descending height of the descending ramp (5).

4. A channel dispersed flow diversion sill structure according to claim 3, characterized in that: The length of the upper channel (3) is greater than the length of the descending ramp (5).

5. A channel dispersion diversion sill structure according to claim 4, characterized in that: The slope of the descending ramp (5) is greater than the slope of the outlet channel of the drainage channel.

6. A channel dispersion diversion sill structure according to claim 5, characterized in that: The slope of the lower channel (6) is the same as the slope of the outlet channel of the drainage channel.

7. A channel dispersed flow diversion sill structure according to claim 6, characterized in that: The ends of the upper drainage wall (4) and the lower drainage wall (7) are both arc-shaped; the upper drainage wall (4) is used to change the direction of water flow in the upper diversion bank (1); and the lower drainage wall (7) is used to change the direction of water flow in the lower channel (6).

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