CN113863241B - Ecological migration fishway - Google Patents
Ecological migration fishway Download PDFInfo
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- CN113863241B CN113863241B CN202111204363.3A CN202111204363A CN113863241B CN 113863241 B CN113863241 B CN 113863241B CN 202111204363 A CN202111204363 A CN 202111204363A CN 113863241 B CN113863241 B CN 113863241B
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- fishway
- water
- flow
- inclined plate
- water flow
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/08—Fish passes or other means providing for migration of fish; Passages for rafts or boats
- E02B8/085—Devices allowing fish migration, e.g. fish traps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/60—Ecological corridors or buffer zones
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The embodiment of the invention provides an ecological migration fishway, which comprises: a fishway body; a narrow part is arranged in the fishway body close to the reservoir dam; the narrow part is formed by symmetrically arranging oval wall plates on the side walls of the fishway on two sides of the narrow part; the middle part of each oval wall plate is a smooth surface, the upstream part is provided with water inlet holes which are uniformly distributed, and the downstream part is provided with water outlet holes which are uniformly distributed; an impeller which is vertically installed is arranged in a space formed by surrounding each oval wall plate and the side wall of the fishway, and the impeller is driven to rotate by a motor, so that water flow in the space flows to the water outlet hole from the water inlet hole. According to the invention, the water flow can be accelerated under the action of the impeller through the narrow part, and the acceleration process can not cause fish injury, so that the safety of the fish in the migration fishway is ensured; meanwhile, because the impeller is vertically arranged, the water flow of the whole channel section can be accelerated instead of being locally accelerated.
Description
Technical Field
The invention relates to the technical field of concrete construction, in particular to an ecological migration fishway.
Background
Due to the construction of the reservoir, a lot of migratory fishes cannot migrate, so that the original ecological balance of the river channel is destroyed, and some fishes are extincted. An ecological fishway is built around a reservoir, so that part of fishes can enter the ecological fishway in a certain sense, and the effect of migration is achieved. However, the ecological fishway has extremely small height drop, so that the water flow is slow; meanwhile, the problem of sludge cleaning exists in the ecological fishway, regular cleaning is usually required in the whole process, and the ecological environment of the fishes can be damaged in the cleaning process.
Disclosure of Invention
In view of the above technical problems, embodiments of the present invention provide an ecological migration fishway, which solves the problems of slow water flow and difficulty in cleaning sludge.
An ecological migration fishway comprising:
the fishway body is guided to the upstream of the reservoir from the reservoir dam along the back of the mountain body, the cross section of the fishway body is U-shaped, and the fishway body comprises fishway side walls on two sides and a fishway bottom wall at the bottom;
a narrow part is arranged in the fishway body close to the reservoir dam;
the narrow part is formed by symmetrically arranging oval wall plates on the side walls of the fishway on two sides of the narrow part;
the middle part of each oval wall plate is a smooth surface, the upstream part is provided with uniformly distributed water inlet holes, the downstream part is provided with uniformly distributed water outlet holes, the width of the area where the water inlet holes are arranged is smaller than that of the area where the water outlet holes are arranged, the area where the water inlet holes are arranged is close to the side wall of the fishway connected with the upstream part (so that the water inlet flow is far away from the center of the fishway and the fishes are prevented from being sucked into the water inlet hole parts by the water flow), and the area where the water outlet holes are arranged is close to the middle part (so that the water outlet flow is close to the center of the fishway, the generated fluid adsorption effect is larger, and the flow speed are integrally amplified);
an impeller which is vertically installed is arranged in a space formed by surrounding each oval wall plate and the side wall of the fishway, and the impeller is driven to rotate by a motor, so that water flow in the space flows to the water outlet hole from the water inlet hole.
A first inclined plate is arranged at the top of the upstream part of the narrow part to guide the water flow at the upper part to flow downwards;
a concave sludge groove is formed in the bottom wall of the fishway at the downstream part of the narrow part, a second inclined plate is arranged at the upper part of the sludge groove, the inclination of the second inclined plate is greater than that of the first inclined plate, so that the water flow is blocked, and the sludge in the water flow sinks downwards after being blocked; first swash plate and second swash plate's effect is different, but the silt deposit in the rivers is accomplished in the cooperation each other, first swash plate makes its fishway flow along first swash plate below rivers guide with the rivers guide of surface of water upper portion at first, just also guide the silt of carrying downwards simultaneously, behind the rivers acceleration of narrow portion, the silt velocity of flow also increases thereupon, after meetting the effect that blocks on second inclined plane, under the kinetic energy effect of silt, make the faster downstream of the velocity of flow of silt than rivers, thereby the sedimentary effect has been realized.
The top of the first inclined plate is provided with a rotating shaft, so that the inclination of the first inclined plate is adjustable.
The width of the narrow part is less than half of the cross section width of the fishway body.
According to the invention, the water flow can be accelerated under the action of the impeller through the narrow part, and the acceleration process can not cause fish injury, so that the safety of the fish in the migration fishway is ensured; meanwhile, the impeller is vertically arranged, so that the water flow of the whole channel section can be accelerated instead of being locally accelerated; through the swash plate that sets up in last low reaches and the silt groove that low reaches were arranged, can make the silt in the rivers deposit fast and collect in the silt groove to reduce other position silt, reduced the ecological destruction that the desilting brought the fishway, usually as long as the fixed point clearance silt in the silt groove can, the work load is little, and swift convenient.
Drawings
The invention may be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which:
other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
Fig. 1 is a schematic plane structure diagram of an ecological migration fishway according to an embodiment of the invention.
Fig. 2 is a schematic view of an internal structure of an ecological migration fishway according to an embodiment of the invention.
Detailed Description
Example embodiments will now be described with reference to the accompanying drawings, which may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
As shown in fig. 1-2, the present invention provides an ecological migration fishway, comprising:
the fishway body is introduced to the upstream of the reservoir from the reservoir dam along the back of a mountain, is U-shaped in cross section and comprises fishway side walls 11 at two sides and a fishway bottom wall 12 at the bottom;
a narrow part is arranged in the fishway body close to the reservoir dam;
the narrow part is formed by symmetrically arranging oval wall plates 6 on the side walls of the fishway on two sides of the narrow part;
the middle part 62 of each oval wall plate 6 is a smooth surface, the upstream part 61 is provided with uniformly distributed water inlet holes, the downstream part 63 is provided with uniformly distributed water outlet holes, the width of the area where the water inlet holes are arranged is smaller than that of the area where the water outlet holes are arranged, the area where the water inlet holes are arranged is close to the side wall of the fishway connected with the upstream part (so that the water flow of the inlet water is far away from the center of the fishway and the fish are prevented from being sucked into the water inlet holes by the water flow), and the area where the water outlet holes are arranged is close to the middle part (so that the water flow of the outlet water is close to the center of the fishway, the generated fluid adsorption effect is larger, and the flow speed are integrally amplified);
an impeller 5 which is vertically installed is arranged in a space formed by surrounding each oval wall plate 6 and the fishway side wall 11, and the impeller is driven by a motor to rotate, so that water flow in the space flows to the water outlet holes from the water inlet holes.
A first inclined plate 31 is arranged at the top of the upstream part of the narrow part to guide the water flow at the upper part to flow downwards;
a concave sludge groove 4 is arranged on the bottom wall of the fishway at the downstream part of the narrow part, a second inclined plate 32 is arranged on the upper part of the sludge groove, the inclination of the second inclined plate is greater than that of the first inclined plate so as to block the water flow, and the sludge in the water flow sinks downwards after being blocked; first swash plate and second swash plate's effect is different, but the silt deposit in the rivers is accomplished in the cooperation each other, first swash plate makes its fishway flow along first swash plate below rivers guide with the rivers guide of surface of water upper portion at first, just also guide the silt of carrying downwards simultaneously, behind the rivers acceleration of narrow portion, the silt velocity of flow also increases thereupon, after meetting the effect that blocks on second inclined plane, under the kinetic energy effect of silt, make the faster downstream of the velocity of flow of silt than rivers, thereby the sedimentary effect has been realized.
The top of the first inclined plate 31 is provided with a rotating shaft, so that the inclination of the first inclined plate 31 is adjustable.
The width of the narrow part is less than half of the cross section width of the fishway body.
According to the invention, the water flow can be accelerated under the action of the impeller through the narrow part, and the acceleration process can not cause fish injury, so that the safety of the fish in the migration fishway is ensured; meanwhile, the impeller is vertically arranged, so that the water flow of the whole channel section can be accelerated instead of being locally accelerated; through the swash plate that sets up in last low reaches and the silt groove that low reaches were arranged, can make the silt in the rivers deposit fast and collect in the silt groove to reduce other position silt, reduced the ecological destruction that the desilting brought the fishway, usually as long as the fixed point clearance silt in the silt groove can, the work load is little, and swift convenient.
Claims (1)
1. An ecological migration fishway comprising:
the fishway body is guided to the upstream of the reservoir from the reservoir dam along the back of the mountain body, the cross section of the fishway body is U-shaped, and the fishway body comprises fishway side walls on two sides and a fishway bottom wall at the bottom;
a narrow part is arranged in the fishway body close to the reservoir dam;
the narrow part is formed by symmetrically arranging oval wall plates on the side walls of the fishway on two sides of the narrow part;
the middle part of each oval wall plate is a smooth surface, the upstream part is provided with uniformly distributed water inlet holes, the downstream part is provided with uniformly distributed water outlet holes, the width of the area where the water inlet holes are arranged is smaller than that of the area where the water outlet holes are arranged, the area where the water inlet holes are arranged is close to the side wall of the fishway connected with the upstream part, so that the water inlet flow is far away from the center of the fishway, the fishes are prevented from being sucked into the water inlet holes by the water flow, the area where the water outlet holes are arranged is close to the middle part, the water outlet flow is close to the center of the fishway, the generated fluid adsorption effect is larger, and the flow rate are integrally amplified;
a vertically-installed impeller is arranged in a space formed by surrounding each oval wall plate and the side wall of the fishway, and the impeller is driven by a motor to rotate, so that water flow in the space flows to the water outlet holes from the water inlet holes;
a first inclined plate is arranged at the top of the upstream part of the narrow part to guide the water flow at the upper part to flow downwards;
a concave sludge groove is formed in the bottom wall of the fishway at the downstream part of the narrow part, a second inclined plate is arranged at the upper part of the sludge groove, the inclination of the second inclined plate is greater than that of the first inclined plate, so that the water flow is blocked, and the sludge in the water flow sinks downwards after being blocked; the first inclined plate guides the water flow at the upper part of the water surface to flow along a fishway below the first inclined plate, and simultaneously guides carried silt downwards, the flow velocity of the silt is increased after the water flow passing through the narrow part is accelerated, and the silt moves downwards faster than the flow velocity of the water flow under the action of kinetic energy of the silt after meeting the blocking action of the second inclined plate;
the top of the first inclined plate is provided with a rotating shaft, so that the inclination of the first inclined plate is adjustable;
the width of the narrow part is less than half of the cross section width of the fishway body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204363.3A CN113863241B (en) | 2021-10-15 | 2021-10-15 | Ecological migration fishway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204363.3A CN113863241B (en) | 2021-10-15 | 2021-10-15 | Ecological migration fishway |
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| Publication Number | Publication Date |
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| CN113863241A CN113863241A (en) | 2021-12-31 |
| CN113863241B true CN113863241B (en) | 2022-09-02 |
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| CN202111204363.3A Active CN113863241B (en) | 2021-10-15 | 2021-10-15 | Ecological migration fishway |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114508082B (en) * | 2022-01-06 | 2024-06-11 | 上海市园林设计研究总院有限公司 | Unpowered power-assisted migration device |
| CN115419028B (en) * | 2022-09-26 | 2023-08-11 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Tidal estuary fishway with sinking rest pool and design method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204112294U (en) * | 2014-07-30 | 2015-01-21 | 陈嘉玉 | Dual channel formula flow velocity controlled ecological fish pass |
| CN207567737U (en) * | 2017-12-04 | 2018-07-03 | 兰州理工大学 | Fish pass |
| CN208151988U (en) * | 2017-12-31 | 2018-11-27 | 华北水利水电大学 | Step cabinet ecological fishway system |
| CN108277784B (en) * | 2018-02-05 | 2019-11-29 | 安徽理工大学 | It is adapted to the imitative nature fish pass of different Burden-Swimming Ability of KM fish |
| CN109056670A (en) * | 2018-09-20 | 2018-12-21 | 长江水利委员会长江科学院 | A kind of imitative nature fish pass based on bionic plant |
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