Reinforced concrete segmented concentrated rotary climbing type fishway suitable for medium-high water head

Abstract

The utility model relates to the technical field of migration fishways, in particular to a reinforced concrete segmented concentrated rotary climbing type fishway suitable for medium and high water heads. According to the scheme, the fishway comprises a fishway body, a fish inlet is formed in one end of the fishway body, a fish outlet is formed in the other end of the fishway body, a partition plate is arranged in the fishway body in the length direction and divides the fishway body into a first channel and a second channel, and the second channel is located below the first channel; a plurality of baffles are further arranged in the first channel, the height of the baffles is matched with the height of the first channel, and the length of the baffles is smaller than the width of the first channel, so that a fish passing opening is formed between the baffles and the inner wall of the first channel; and at least one notch communicated with the first channel and the second channel is formed in the partition plate corresponding to the baffle plate. Sediment carried by water flow in the first channel is guided into the second channel through the notch, and sediment deposition in the first channel is reduced.

Description

Technical Field

[0001] This utility model relates to the field of migratory fishway technology, specifically to a reinforced concrete segmented centralized rotary climbing fishway suitable for medium to high water heads. Background Technology

[0002] In migratory fishways built along the edge of dams, a low water flow velocity is required to allow fish to swim, thus increasing the probability of sediment deposition at the bottom of the fishway. For fishways with baffles to block the water flow, such as vertical slotted fishways, the probability of sediment deposition at the bottom of the fishway on the upstream side of the baffle is further increased, and it is difficult for the sediment on the upstream side to be washed downstream by the water flow, resulting in a shorter maintenance cycle for the fishway.

[0003] Therefore, in order to address the above-mentioned shortcomings, this application provides a reinforced concrete segmented centralized rotary climbing fishway suitable for medium and high water heads, which can reduce the deposition of sediment on the upstream side. Utility Model Content

[0004] The purpose of this utility model is to address the technical problem of sediment deposition on the upstream side of baffles in fishways in the prior art. This application provides a reinforced concrete segmented centralized rotary climbing fishway suitable for medium to high water heads. The fishway is configured as a double-layer structure with a first channel above a second channel. A notch is provided on the baffle corresponding to the upstream side of the first channel, allowing sediment deposited in the first channel to flow through the notch to the hollow second channel under the scouring of the water flow. The water then flows downstream through the second channel, achieving the technical effect of reducing sediment deposition in the fishway and improving the fishway's own sediment-clearing ability.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A reinforced concrete segmented centralized rotary climbing fishway suitable for medium and high water heads includes a fishway, one end of which is a fish inlet and the other end is a fish outlet. A partition is provided along the length of the fishway, which divides the fishway into a first channel and a second channel, with the second channel located below the first channel.

[0007] Several first baffles are also provided in the first channel. The height of the first baffles is adapted to the height of the first channel, and the length of the first baffles is less than the width of the first channel, so that a fish passage is formed between the first baffles and the inner wall of the first channel.

[0008] At least one notch connecting the first channel and the second channel is provided on the partition corresponding to the first baffle.

[0009] As a preferred technical solution of this application, at least one notch is provided between adjacent first baffles.

[0010] As a preferred technical solution of this application, the notch is located on the baffle plate corresponding to the flow-facing side of the first baffle.

[0011] As a preferred technical solution of this application, the notch is a long through groove that extends from one end of the partition to the other end of the partition.

[0012] As a preferred technical solution of this application, a grid plate is detachably provided on the notch.

[0013] As a preferred technical solution of this application, the first baffle is perpendicular to the partition.

[0014] As a preferred technical solution of this application, the first baffle is located on the same side of the first channel, and a second baffle is also provided on the other side of the first channel. The second baffle is separated from the first baffle, and the fish passage is formed between the second baffle and the first baffle.

[0015] As a preferred technical solution of this application, there are multiple second baffles, and there is a second baffle on the corresponding side wall of the first channel between adjacent first baffles.

[0016] As a preferred technical solution of this application, a third baffle is slidably provided on the first baffle, the third baffle can slide downward along the first baffle and extend into the second channel.

[0017] As a preferred technical solution of this application, a sliding groove is provided on the first baffle corresponding to the third baffle, the third baffle is slidably disposed in the sliding groove, and a push rod is fixedly connected to the top of the third baffle.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The fishway provided in this application divides the fishway into an upper first channel and a lower second channel by a partition. A first baffle is installed in the first channel to prevent water flow from dissipating energy, providing a gentle migratory flow for fish. An opening is provided on the water-facing side of the first baffle, allowing sediment carried by the water flow to enter the second channel. Simultaneously, the water flow washes away sediment deposited on the partition, causing the deposited sediment to flow through the opening into the second channel and downstream with the water flow in the second channel, reducing sediment deposition in the first channel. A third baffle, extending into the second channel, is also installed on the water-facing side of the first baffle corresponding to the opening, allowing water from the second channel to flow into the first channel through the opening, further washing away sediment near the opening. The repeated washing of sediment near the opening by the water flow in the first and second channels reduces sediment deposition in the first channel and improves the maintenance cycle of the fishway.

[0020] 2. The first and second baffles work together to dissipate the energy of the water flow, reducing the water flow velocity on the upstream side of the first baffle, which is beneficial for fish to rest during their migration.

[0021] 3. When rainfall is low in the area where the fishway is located, the water flow rate in the fishway is low. Because the first and second baffles reduce the water flow velocity, the water renewal rate between adjacent first baffles decreases, resulting in a decrease in dissolved oxygen. By extending the third baffle into the second channel, the water flow in the second channel is diverted into the first channel, thus renewing the water flow in the first channel and increasing the dissolved oxygen content in the water. Attached Figure Description

[0022] Figure 1 A top view of the first passage with a first baffle and a notch;

[0023] Figure 2 for Figure 1 Schematic diagram of the AA section;

[0024] Figure 3 A top view showing the notch in the first channel being set as a long through slot;

[0025] Figure 4 A top view of the first channel where the first and second baffles cooperate;

[0026] Figure 5 for Figure 4 Schematic diagram of the BB cross section;

[0027] Figure 6 A top view showing a third baffle and a push rod provided in the first baffle;

[0028] Figure 7 for Figure 6 Schematic diagram of the CC section;

[0029] Figure 8 for Figure 6 A magnified view of a section at point E in the middle;

[0030] Figure 9 for Figure 7 Schematic diagram of the DD section;

[0031] Figure 10 for Figure 9 A magnified view of a section at point F in the middle;

[0032] Figure 11 This is a schematic diagram of the DD cross-section after the third baffle extends into the second channel.

[0033] The diagram shows: 1-First channel, 2-Second channel, 3-Baffle, 4-First baffle, 41-Second baffle, 5-Fish passage, 6-Notch, 7-Third baffle, 8-Slide groove, 9-Push rod, 10-Rotating hook, 11-Rotating shaft, 12-Protrusion, 13-Inclined surface. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0035] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely illustrates some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0036] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Example 1: For example Figures 1-11As shown in this embodiment, a segmented, centralized, rotating, and ascending fishway made of reinforced concrete, suitable for medium to high water heads, is provided. The fishway is divided into an upper first channel 1 and a lower second channel 2 by a partition 3. A first baffle 4 is installed in the first channel 1 to prevent water flow from dissipating energy, providing a gentle migratory flow for fish. A notch 6 is provided on the water-facing side of the first baffle 4, allowing sediment carried by the water flow to be directed into the second channel 2. Simultaneously, the water flow washes away sediment deposited on the partition 3, causing the deposited sediment to flow through the notch 6 into the second channel 2, and then downstream with the water flow in the second channel 2, reducing sediment deposition in the first channel 1. A third baffle 7, extending into the second channel 2, is also provided on the water-facing side of the first baffle 4 corresponding to the notch 6, allowing water from the second channel 2 to flow into the first channel 1 through the notch 6, further washing away sediment near the notch 6. Through repeated washing of sediment near the notch 6 by the water flow in the first channel 1 and the second channel 2, sediment deposition in the first channel 1 is reduced, improving the maintenance cycle of the fishway.

[0040] This embodiment provides a segmented, centralized, rotating, and ascending fishway made of reinforced concrete, suitable for medium to high water heads. The fishway includes a fishway with an inlet at one end and an outlet at the other. For example... Figure 1 and Figure 2 As shown, a partition 3 is provided along the length of the fishway, and the partition 3 divides the fishway into a first channel 1 and a second channel 2, with the second channel 2 located below the first channel 1;

[0041] Several first baffles 4 are also provided in the first channel 1. The height of the first baffles 4 is adapted to the height of the first channel 1, and the length of the first baffles 4 is less than the width of the first channel 1, so that a fish passage 5 is formed between the first baffles 4 and the inner wall of the first channel 1.

[0042] At least one notch 6 connecting the first channel 1 and the second channel 2 is provided on the partition 3 corresponding to the first baffle 1.

[0043] The fishway provided in this embodiment is further equipped with removable mesh panels at the inlet and outlet of the second channel 2 to prevent fish from entering the second channel 2. These panels also block aquatic plants, branches, and other debris, reducing the risk of blockage. Fish enter through the downstream inlet, swim upstream along the first channel 1, and exit through the outlet.

[0044] In this application, the fish passage 5 is a channel for fish to swim through, so the width of the fish passage 5 is designed according to the size of the fish in the actual scenario, and will not be elaborated further in this application. The pool formed between the fish passage 5 and the baffle in the first channel 1 forms a migration area, and the upstream side of the baffle forms a resting area for the fish. The silt deposited on the partition 3 corresponding to the upstream direction of the gap 6 is partially carried by the water flow through the gap 6 to the second channel 2, and the other part is carried by the water flow in the first channel 1 to the downstream direction of the gap 6, thereby reducing the silt deposited in the first channel 1.

[0045] As a preferred embodiment, the first baffle 4 and the inner walls on both sides form the fish passage 5, thereby increasing the migration area of ​​the first channel 1 and improving the fish passage capacity; at the same time, the water flowing from both ends of the first baffle 4 near the inner wall to the upstream side can wash away the mud and sand, reducing the probability of mud and sand deposition.

[0046] As another preferred embodiment, one end of the first baffle 4 along the length direction is connected to an inner wall, and the other end of the first baffle 4 and another inner wall form the fish passage 5, so that the water flow between the first baffle 4 and the inner wall is gentler, which is conducive to fish resting.

[0047] As a preferred technical solution, at least one gap 6 is provided between adjacent first baffles 4, so that all the sediment deposited on the upstream side of the first baffles 4 can flow with the water flow to the second channel 2 through the gap 6.

[0048] Furthermore, based on the above scheme, the gap 6 is located on the baffle 3 corresponding to the flow-facing side of the first baffle 4, so that the mud and sand deposited on the baffle 3 between the first baffles 4 can flow to the second channel 2 through the gap 6, while reducing the accumulation of mud and sand on the baffle 3 corresponding to the flow-facing side.

[0049] For example Figure 3 As shown, based on the above solution, the gap 6 is further designed as a long channel, extending from one end of the partition 3 to the other end, reducing the area of ​​sediment deposition on the partition 3. Simultaneously, when manually cleaning the fishway, personnel can use tools to directly collect the sediment into the gap 6, utilizing the water flow in the second channel 2 to drain the sediment from the first channel 1 downstream, reducing the difficulty of manual sediment removal. In this application, the size of the gap 6 matches the size of fish in the actual scenario, minimizing the number of fish entering the second channel 2.

[0050] Furthermore, based on the above solution, a grid plate can be detachably installed on the gap 6 to further reduce the probability of fish entering the second channel 2.

[0051] Example 2: For example Figure 4 and Figure 5 As shown, based on Embodiment 1, this embodiment further includes a first baffle 4 that is perpendicular to the partition 3, which facilitates construction and helps to shorten the construction time of the fishway.

[0052] As a further implementation, the first baffle 4 is arranged perpendicular to the inner wall of the first channel 1 along its length, which increases the cross-sectional area of ​​the water flow blocked on the upstream side, which is beneficial to improving the energy dissipation of the water flow by the first baffle 4.

[0053] As a preferred technical solution, the first baffle 4 is located on the same side of the first channel 1, and a second baffle 41 is also provided on the other side of the first channel 1. The second baffle 41 is separated from the first baffle 4, and the fish passage 5 is formed between the second baffle 41 and the first baffle 4.

[0054] As a preferred technical solution, there are multiple second baffles 41, with one second baffle 41 on each side wall of the first channel 1 between adjacent first baffles 4.

[0055] As a further implementation method, for example Figure 4 As shown, parallel inclined surfaces 51 are provided at opposite ends of the backwater side of the first baffle 4 and the frontwater side of the second baffle 41, and the fish passage 5 is formed between the inclined surfaces 51.

[0056] The second baffle 41 is used to assist in energy dissipation, forming a multi-stage energy dissipation unit by alternating with the first baffle 4. After the water flow is blocked by the second baffle 41, it flows out of the previous stage pool along the fish passage 5, causing the water flow blocked by the second baffle 41 to change direction and reduce resistance to fish migration. The multi-stage fish passage 5 forms a straight migration zone along the length of the fishway, thus reducing the migration distance of the fish.

[0057] Example 3: For example Figures 6-11 As shown, based on Embodiment 1, this embodiment further includes a third baffle 7 slidably disposed on the first baffle 4. The third baffle 7 can slide downward along the first baffle 4 and extend into the second channel 2.

[0058] Specifically, after the third baffle 7 extends into the second channel 2, the water flow in the second channel 2 is blocked by the third baffle 7 and flows into the first channel 1 through the gap 6, washing away the silt on the partition 3 near the gap 6. Simultaneously, during periods of low rainfall, the water flow in the fishway is less and the flow velocity is lower, resulting in a reduced water turnover rate and dissolved oxygen levels in the pool between the first baffle 4 and the second baffle 41. The third baffle 7 allows the water flow from the second channel 2 into the first channel 1, renewing the water flow and simultaneously lifting the water flow from the bottom of the first channel 1. This allows the water with lower dissolved oxygen levels at the bottom to flow upwards and exchange with the water with higher dissolved oxygen levels at the top, increasing the dissolved oxygen level in the pool, which is beneficial for fish survival and improves the success rate of migration.

[0059] As a preferred technical solution, a groove 8 is provided on the first baffle 4 corresponding to the third baffle 7, the third baffle 7 is slidably disposed in the groove 8, and a push rod 9 is fixedly connected to the top of the third baffle 7. The groove 8 is perpendicular to the partition 3.

[0060] Furthermore, a rotating hook 10 connected to the push rod 9 is provided at the top of the first baffle 4. The rotating hook 10 rotates around a rotating shaft 11 fixedly mounted at the top of the first baffle 4. When the fishway manager observes that the water flow velocity in the first channel 1 slows down and / or fish swim to the surface to breathe and / or sediment begins to accumulate around the gap 6, the push rod 9 is lifted to separate the push rod 9 from the rotating hook 10. By kicking or another person operating the system, the rotating hook 10 is made parallel to the width direction of the first baffle 4. The fishway manager then lowers the push rod 9, causing the third baffle 7 to slide towards the second channel 2. When the third baffle 7 slides upward from the second channel 2, the push rod 9 is pulled up. By kicking or another person operating the system, the rotating hook 10 is made perpendicular to the first baffle 4. The push rod 9 is placed on the rotating hook 10, making it difficult for the third baffle 7 to slide downward.

[0061] As one of the preferred embodiments, for example Figure 7 As shown, the third baffle 7 is a T-shaped baffle. The width of the groove 8 located on the first baffle 4 is adapted to the width of the horizontal part of the T-shaped baffle; the width of the groove 8 located on the partition 3 is adapted to the width of the vertical part of the T-shaped baffle, so that after the horizontal part is blocked, the third baffle is difficult to continue to slide down, and the vertical part of the T-shaped baffle extends into the second channel.

[0062] As one of the preferred embodiments, the widths of the third baffle 7 and the notch 6 are matched so that the cross-sectional area of ​​the third baffle 7 blocking the water flow is maximized, and as much water flow from the second channel 2 as possible is directed to the first channel 1.

[0063] As a preferred embodiment, for example Figure 7 and Figure 11 As shown, one end of the bottom of the third baffle 7 is inclined with an inclined surface 13 facing the notch 6. The inclined surface 13 extends into the second channel 2, increasing the probability that water from the second channel 2 flows into the first channel 1. The angle of the inclined surface 13 is less than 10 degrees and can be designed according to the size of the notch 6 in the actual scenario, which will not be elaborated in this application. Furthermore, the height of one end of the bottom of the chute 8 from the bottom of the third baffle 7 is adapted to the height of the inclined surface 13 in the vertical direction, reducing the probability that the sliding of the third baffle 7 is affected by the inclined surface 13.

[0064] Example 4: Building upon the previous examples, this example further includes a single-line segment and a turning segment in the fishway, connected by an arc-shaped section. The single-line segment is positioned in sloping areas with minimal gradient changes, mimicking the characteristics of natural waterways with fewer bends and gentler flow, which helps fish adapt to the fishway. The turning segment is positioned in sloping areas with steeper angles, where the high water head creates significant energy, making it difficult for fish to overcome the resistance through swimming alone. Therefore, the turning segment is arranged in a stepped fashion along the slope, guiding continuous water flow and constructing a migration channel for fish in areas with significant head differences. Furthermore, the turning design of the fishway facilitates centralized fishway management and allows for simultaneous observation of the migration patterns of multiple fishways, improving the efficiency of fish management.

[0065] As a preferred technical solution, a protrusion 12 is provided on the water-facing side of the first baffle 4 and at the end near the fish passage 5. The protrusion direction of the protrusion 12 is opposite to the water flow direction, so that the groove formed by the protrusion 12, the first baffle 4 and the inner wall of the fish passage is blocked when the water flows into the groove, forming a backflow. This not only dissipates the energy of the water flowing towards the first baffle 4, but also provides a resting place for the fish.

[0066] Furthermore, the angle formed between the protrusion 12 and the first baffle 4 is adjusted according to the actual flow rate of the fishway during the migration period. Increasing the angle increases the cross-sectional area of ​​the protrusion 12 in the water flow direction, thereby increasing the energy dissipation of the protrusion 12 on the water flow; decreasing the angle decreases the cross-sectional area of ​​the protrusion 12 in the water flow direction, thereby reducing the energy dissipation of the protrusion 12 on the water flow. Therefore, adjusting the angle according to the actual flow rate during fishway construction helps improve the fishway's ability to adapt to water flow.

[0067] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A reinforced concrete segmented centralized rotary climbing fishway suitable for medium to high water heads, characterized in that, The system includes a fish passage, one end of which is a fish inlet and the other end is a fish outlet. A partition is provided along the length of the fish passage, which divides the fish passage into a first channel and a second channel. The second channel is located below the first channel. Several first baffles are also provided in the first channel. The height of the first baffles is adapted to the height of the first channel, and the length of the first baffles is less than the width of the first channel, so that a fish passage is formed between the first baffles and the inner wall of the first channel. At least one notch connecting the first channel and the second channel is provided on the partition corresponding to the first baffle.

2. The fishway of claim 1, wherein At least one notch is provided between each adjacent first baffle.

3. The fishway of claim 1, wherein The notch is located on the baffle plate corresponding to the flow-facing side of the first baffle.

4. The fishway of claim 1, wherein The notch is a long through groove that extends from one end of the partition to the other end of the partition.

5. The fishway of claim 1, wherein A grid plate is detachably provided on the notch.

6. The fishway as described in any one of claims 1-5, characterized in that, The first baffle is perpendicular to the partition.

7. The fishway according to any one of claims 1 to 5, wherein The first baffle is located on the same side of the first channel, and a second baffle is provided on the other side of the first channel. The second baffle is separated from the first baffle, and the fish passage is formed between the second baffle and the first baffle.

8. The fishway of claim 7, wherein There are multiple second baffles, with one second baffle on each side wall of the first channel between adjacent first baffles.

9. The fishway according to any one of claims 1 to 5, wherein A third baffle is slidably disposed on the first baffle, the third baffle being able to slide downward along the first baffle and extend into the second channel.

10. The fishway of claim 9, wherein A sliding groove is provided on the first baffle corresponding to the third baffle, and the third baffle is slidably disposed in the sliding groove. A push rod is also fixedly connected to the top of the third baffle.

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