CN111893965A - Fishway outlet structure adapting to large water level amplitude variation and fish passing method thereof - Google Patents
Fishway outlet structure adapting to large water level amplitude variation and fish passing method thereof Download PDFInfo
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- CN111893965A CN111893965A CN202010707949.0A CN202010707949A CN111893965A CN 111893965 A CN111893965 A CN 111893965A CN 202010707949 A CN202010707949 A CN 202010707949A CN 111893965 A CN111893965 A CN 111893965A
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
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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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Abstract
The invention discloses a fishway outlet structure suitable for large water level amplitude variation. It comprises a fishway structure and a fish outlet; the whole body is in a cuboid or runway type structure; the fishway structure is arranged in the outer side wall in a centralized spiral mode; the fishway structure comprises a first fishway structure and a second fishway structure; the first fishway structure is communicated with the second fishway structure; the first fishway structure is in a certain gradient; the second fishway structure is a vertical or round-corner turning flat slope structure; the fish outlet is arranged on the water-facing side of the outer side wall; the fish outlet is communicated with the fishway structure; the fishway is communicated with the bottom end of the side surface of the outer side wall. The invention has the advantages of improving the capability of the fishway outlet to adapt to water level change and improving the operation effect of the fishway. The invention also discloses a fish passing method of the fishway outlet structure suitable for large water level amplitude variation.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering and environmental protection engineering, in particular to a fishway outlet structure suitable for large water level amplitude variation. The invention also relates to a fish passing method of the fishway outlet structure suitable for large water level amplitude variation.
Background
The water conservancy and hydropower engineering brings considerable influence on the ecological environment, particularly on the blocking influence of a fish migration channel while exerting benefits of flood control, power generation, shipping and the like, and is concerned in recent years. The fishway is used as a fish protection measure for relieving the barrier effect of the dam internationally for more than 300 years, and can play a role in recovering a fish migration channel and communicating upstream and downstream fishes.
However, for projects with large upstream water level amplitude, under the condition of water level change, the flow, the water surface line and the on-way flow rate of the fishway are affected, and the fish passing efficiency of the fishway is affected. How to improve the capability of the fishway outlet to adapt to water level change is always a technical problem facing home and abroad, and the method for improving the capability of the fishway outlet to adapt to water level change at present mainly arranges a plurality of outlets between the lowest water level and the highest water level of a fishway along the way, but the traditional method has the following defects:
1) for projects with large upstream water level amplitude, the fishway between the lowest water level outlet and the highest water level outlet is long in length, the arrangement occupies a large area, and for dams in canyon terrains, the outlet section often needs large-scale slope excavation and the arrangement difficulty is large;
2) the elevation of the side wall of the upstream section of the fishway is required to be above the highest upstream water level so as to prevent upstream water from overflowing into the fishway and influencing the operation of the fishway. Therefore, for the fishway with larger upstream water level amplitude, the height of the side wall of the low water level inlet needs to be very high, a deep groove is formed, the side wall engineering quantity is large, and the difficulty in observation and maintenance of the fishway is also large.
Therefore, the development of a fishway outlet structure which is suitable for the upstream large water level amplitude is urgently needed.
Disclosure of Invention
The invention aims to provide a fishway outlet structure suitable for large water level amplitude variation, so that the capability of the fishway outlet in adapting to water level variation is improved, and the operation effect of a fishway is improved.
The second purpose of the invention is to provide the fish passing method of the fishway outlet structure suitable for large water level amplitude variation, so that the occupied land is saved, the difficulty in arranging the outlet section is reduced, and the engineering quantity is reduced.
In order to achieve the first object of the present invention, the technical solution of the present invention is: the utility model provides a fishway exit structure that adaptation large water level becomes width of cloth, includes fishway structure and fish outlet, its characterized in that: the whole body is in a cuboid or runway type structure; the fishway structure is arranged in the outer side wall in a centralized spiral mode;
the fishway structure comprises a first fishway structure and a second fishway structure; the first fishway structure is communicated with the second fishway structure; the first fishway structure is in a certain gradient; the second fishway structure is a vertical or round-corner turning flat slope structure;
the fish outlet is arranged on the water-facing side of the outer side wall; the fish outlet is communicated with the fishway structure;
the fishway is communicated with the bottom end of the side surface of the outer side wall.
In the technical scheme, the fishway clapboard is arranged in the first fishway structure; the fishway baffle has a plurality ofly, and is a plurality of the fishway baffle is the interval setting.
In the above technical solution, the fish outlet includes a plurality of fish outlet structures; the plurality of fish outlet structures are arranged in an overlapping manner; the fish outlet structure is communicated with the fishway structure.
In the technical scheme, the opening and closing machine room is arranged on the water-facing side of the outer side wall and above the fish outlet; the hoist engine room has a plurality of.
In the technical scheme, the fishway gate is arranged on the fishway outlet structure; the fishway gate has a plurality ofly.
In the technical scheme, the gate storeroom is arranged on the side of the outer side wall close to the water and on the side of the fish outlet.
In the technical scheme, a plurality of rows of fish outlets are arranged; the gate storeroom is provided with a plurality of gates.
In order to achieve the second object of the present invention, the technical solution of the present invention is: the fish passing method suitable for the fishway outlet structure with large water level amplitude variation is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: adjusting the fishway gate according to the upstream water level, namely closing the fishway gate below the operating water level and opening the fishway gate above the operating water level;
step two: the water body enters the fishway outlet structure through the fish outlet with the corresponding height, spirals in the fishway structure, finally flows into the fishway and enters the downstream;
step three: after the fish enters the fishway outlet structure from the fishway, the fish spirals upward along the fishway structure, and then goes upward to the fishway outlet corresponding to the upstream water level and swims out of the fishway from the fishway outlet.
In the above technical solution, in step three, the specific way for the fish to go up and back up along the fishway structure is as follows: the fish enter the first fishway structure from the fishway and return to the first fishway structure in the opposite direction through the second fishway structure.
The invention has the following advantages:
(1) the upstream outlet sections are arranged in a centralized manner, so that the occupied area is small; the defects of high difficulty in arrangement of an upstream outlet section and large occupied area in the prior art are overcome;
(2) the distance of the water retaining section of the side wall of the fishway at the upstream outlet section is short, and the side wall engineering quantity is small; the defects of high fishway side wall and large engineering quantity of an upstream outlet section in the prior art are overcome;
(3) according to the invention, the side wall of one side of the fishway at the upstream outlet section is lower, so that the observation and maintenance are convenient; the defect that the fishway outlet section in the prior art is of a well-shaped structure and is inconvenient to observe and maintain is overcome;
(4) the fishway outlets are arranged concentratedly, and the dispatching operation is convenient.
The invention is suitable for the hydraulic and hydroelectric engineering with large upstream water level amplitude, and the fishway outlet section is arranged by utilizing the invention, so that the engineering occupation can be saved, the engineering quantity can be reduced, the operation management is convenient, and the fish passing effect of the fishway can be improved.
Drawings
Fig. 1 is a schematic view of the overall arrangement of the fishway outlet of the invention.
Fig. 2 is an enlarged view of fig. 1 at a.
Fig. 3 is an overall three-dimensional structure diagram of the fishway outlet section of the invention.
Fig. 4 is an overall plan view of the fishway outlet section of the invention.
Fig. 5 is an overall front view of the fishway exit section of the invention.
Fig. 6 is a cross-sectional view of the exit section of the fishway of the invention.
Fig. 7 is a schematic view of the arrangement of the fish outlets of the fishway outlet section of the invention.
FIG. 8 is a diagram showing the state of opening and closing the fishway gate when the present invention is operated at the highest water level.
In fig. 1, water is filled downstream 3 and upstream 4.
Fig. 4 shows that the water flows from the first fish outlet structure 7.11 into the fishway outlet structure 2, spirals around the fishway structure and finally flows into the fishway 11; the arrows in FIG. 4 indicate the water flow direction; the fish flow direction is opposite to the water flow direction.
In FIG. 7, there are two rows of fish outlets, the two rows of fish outlets are respectively located at two ends of the upstream surface of the outer side wall; the fish outlet at one end comprises five fish outlet structures which are arranged in an overlapping mode, and the five fish outlet structures are a first fish outlet structure 7.11, a second fish outlet structure 7.12, a third fish outlet structure 7.13, a fourth fish outlet structure 7.14 and a fifth fish outlet structure 7.15 from top to bottom in sequence. In fig. 8, the second fish outlet structure 7.12, the third fish outlet structure 7.13, the fourth fish outlet structure 7.14 and the fifth fish outlet structure 7.15 are all provided with a fishway gate 12;
the fish outlet at the other end comprises four fish outlet structures which are arranged in an overlapping mode, and the four fish outlet structures are a first fish outlet structure 7.11, a second fish outlet structure 7.12, a third fish outlet structure 7.13 and a fourth fish outlet structure 7.14 from top to bottom in sequence. In fig. 8, the second fish outlet structure 7.12, the third fish outlet structure 7.13 and the fourth fish outlet structure 7.14 are all provided with fishway gates. The number of the rows of the fish outlets can be set to other numbers according to the requirement.
In fig. 7, there are two gate storehouses; two hoist rooms are provided; the number of the fish outlets on the two sides is determined according to the water level, and the number of the fish outlets on the two sides can be the same or different.
In the figure, 1-dam, 2-fishway outlet structure, 3-downstream, 4-upstream, 5-fishway structure, 5.1-first fishway structure, 5.2-second fishway structure, 6-fishway partition board, 7-fishway outlet, 7.1-fishway outlet structure, 7.11-first fishway outlet structure, 7.12-second fishway outlet structure, 7.13-third fishway outlet structure, 7.14-fourth fishway outlet structure, 7.15-fifth fishway outlet structure, 8-opening and closing machine room, 9-outer side wall, 10-gate door house, 11-fishway and 12-fishway gate.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily understood by the description.
With reference to the accompanying drawings: a fishway outlet structure adapting to large water level amplitude comprises a fishway structure 5 and a fish outlet 7, wherein the fishway outlet structure 2 is integrally in a cuboid or runway-shaped structure; the fishway structure 5 is arranged in the outer side wall 9 in a centralized spiral mode and is arranged in a spiral mode according to the required gradient of the fishway; the outer side wall 9 plays a role in preventing the upstream water body from overflowing into the fishway; the fishway structure adopts a centralized spiral type, namely the fishway structure adopts a spiral type structure to be centralized and arranged; the traditional fishway structure adopts a way-along linear arrangement mode, in the traditional arrangement mode, the fishway extends along the way and is in a single-line mode, outlets are arranged at intervals, and the outlets are distributed in a distributed mode;
the fishway structure 5 comprises a first fishway structure 5.1 and a second fishway structure 5.2; the first fishway structure 5.1 is communicated with the second fishway structure 5.2; the first fishway structure 5.1 is in a certain gradient;
the second fishway structure 5.2 is a vertical or round-corner turning flat slope structure;
the first fishway structure 5.1 is a fishway section, and the second fishway structure 5.2 is a turning section.
The fish outlet 7 is arranged on the water side of the outer side wall 9; the fish outlet 7 is communicated with the fishway structure 5; the rest pools are positioned at the upstream and downstream sides of the fishway outlet structure 2; the fish outlet 7 is positioned at the waterside side of the rest pool; the rest pool is a turning section, namely a second fishway structure 5.2;
the fishway 11 is communicated with the bottom end of the side wall 9 at the outer side of the fishway outlet structure 2 and is communicated with the fishway structure 5, so that the fishes in the fishway 11 can smoothly enter the fishway outlet structure 2 (as shown in fig. 1, 2, 3 and 4).
Further, a fishway baffle 6 is arranged in the first fishway structure 5.1; the fishway clapboards 6 are arranged in a plurality, and the fishway clapboards 6 are arranged at intervals; the fishway partition plate has the functions of energy dissipation, slowing down the water flow speed in the fishway to meet the requirement of the flow restriction capacity of the fishes and ensuring that the fishes can go up (as shown in figures 1, 2, 3, 4 and 6).
Furthermore, each fish outlet 7 comprises a plurality of fish outlet structures 7.1, and the fish outlet structures are arranged in an overlapping manner; the plurality of fish outlet structures 7.1 are vertically distributed in the longitudinal direction, the fishway gates 12 are arranged on the fish outlet structures 7.1, and the fishway gates 12 are arranged in layers in the longitudinal direction; the number of the fish outlets 7 and the fish outlet structures 7.1 is set according to the actual situation;
the fish outlet structure 7.1 is communicated with the fishway structure 5, so that water and fish can smoothly pass between the fish outlet structure 7.1 and the fishway structure 5 (as shown in fig. 5, 7 and 8).
Furthermore, an opening and closing machine room 8 is arranged on the side of the outer side wall 9 close to the water and above the fish outlet 7; a plurality of opening and closing machine rooms 8 are arranged; the number of the opening and closing machine rooms 8 is equal to that of the fish outlets 7; an opening and closing machine is arranged in the opening and closing machine room 8, and the opening and closing machine is connected with the fishway gate 12 and used for operating the fishway gate 12 (as shown in figures 3, 4, 5 and 7).
Further, a fishway gate 12 is arranged on the fish outlet 7; an opening and closing machine is arranged in the opening and closing machine room 8 and used for operating the fishway gate 12;
a plurality of fishway gates 12 are arranged, and the fishway gates 12 correspond to the fishway outlet structure 7.1; the number of the fishway gates 12 is the same as that of the fishway outlet structures 7.1; when it is desired to close the fish outlet 7, a fishway gate 12 is placed in a fish outlet structure 7.1 for closing the fish outlet structure 7.1 (see fig. 5, 7, 8).
Furthermore, a gate storeroom 10 is arranged on the side of the outer side wall 9 close to the water and is positioned beside the fish outlet 7.
Furthermore, the fish outlets 7 are provided with a plurality of rows which are respectively arranged at two ends of the outer side wall 9; the fish passing efficiency is improved;
the gate door storeroom 10 is provided with a plurality of gates; the number of the gate storehouses 10 is the same as that of the fish outlets 7; the gate door storeroom 10 can be provided with one or more gate door storerooms according to the actual engineering requirement.
A gate door storehouse 10 is arranged beside each fish outlet 7; when the fish outlet structure 7.1 needs to be closed, the fishway gate 12 is placed in the fish outlet structure 7.1, and when the fish outlet structure is not needed, the fishway gate 12 is placed in the gate door warehouse 10 beside the fish outlet 7 (as shown in fig. 3, 5, 7 and 8).
With reference to the accompanying drawings: the fish passing method suitable for the fishway outlet structure with large water level amplitude variation comprises the following steps:
the method comprises the following steps: adjusting a fishway gate 12 according to the upstream 4 water level, namely closing the fishway gate 12 below the operating water level and opening the fishway gate 12 above the operating water level (as shown in figures 1, 2 and 8);
step two: the water body enters the fishway outlet structure 2 through the fish outlet 7 with corresponding height, spirals in the fishway structure 5, finally flows into the fishway 11 and enters the downstream 3;
step three: after entering the fishway outlet structure 2 from the fishway 11, the fish circles and traces upwards along the fishway structure 5, traces upwards to the fish outlet 7 corresponding to the water level of the upstream 4, and swims out of the fishway from the fish outlet 7 (as shown in fig. 3, 4, 5, 6 and 7).
Further, in the third step, the specific way that the fish spirals up along the fishway structure is as follows: the fish enters the first fishway structure 5.1 from the fishway 11, then returns to the first fishway structure 5.1 section in the reverse direction through the second fishway structure 5.2 (the second fishway structure 5.2 is a flat slope), the first fishway structure 5.1 and the second fishway structure 5.2 form a loop shape, and the fish can be coiled for different times according to the water level until the fish is coiled out of the fish opening 7 (as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6).
Examples
The invention will now be described in detail by taking the fish passing through a certain hydro-junction dam as an example, and the invention also has a guiding function for the fish passing through other hydro-junction dams with large water level amplitude.
The water level amplitude of a certain hydro-junction dam is 30m, the traditional fishway outlet coastal arrangement mode is adopted, the length of an outlet section on the dam is more than 1.5km, the maximum height of a side wall of the outlet section is more than 35m, the side wall with the length of 1.5km needs to retain water, the height of the side wall is high, the length is long, the thickness is large, the engineering quantity is huge, a plurality of (about 9) opening and closing machine rooms need to be built, and the problem that the light extraction of the outlet section is poor and the overhaul is inconvenient is caused.
The method for passing fish in the fishway outlet structure of a certain hydro-junction dam comprises the following steps,
the method comprises the following steps: adjusting a fishway gate 12 according to the upstream 4 water level, namely closing the fishway gate 12 below the operating water level and opening the fishway gate 12 above the operating water level (as shown in figures 1, 2 and 8);
step two: the water body enters the fishway outlet structure through the fish outlet 7 with corresponding height, spirals in the fishway structure 5, finally flows into the fishway 11 and enters the downstream 3; wherein, the fish outlet 7 is provided with two rows which are respectively arranged at two ends of the outer side wall 9;
step three: after entering the fishway outlet structure from the fishway 11, the fish circularly trace upwards along the fishway structure 5 to the fish outlet 7 corresponding to the water level of the upstream 4, and swim out of the fishway from the fish outlet 7;
the fish circling upward along the fishway structure is that the fish enters the first fishway structure 5.1 from the fishway 11, then enters the reverse first fishway structure 5.1 section through the second fishway structure 5.2 and then returns back, and the fish circling times are different according to the water level until the fish circling out of the fish outlet 7 (as shown in fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7).
And (4) conclusion: in the embodiment, by adopting the centralized spiral arrangement scheme, the outlet section only blocks water at the outermost side, the water blocking length is about 1/8 of the traditional arrangement scheme, the height and the thickness of the fishway side wall are both greatly reduced, the number of the opening and closing machine rooms is also reduced to 2, the engineering quantity is greatly saved, meanwhile, the light of the outlet section is good, the fish is more adaptable, and the maintenance and observation of the outlet section are also facilitated (as shown in figure 8).
In order to more clearly illustrate the advantages of the fishway outlet structure suitable for large water level amplitude variation and the fish passing method thereof in comparison with the prior art, the two technical schemes are compared by workers, and the comparison results are as follows:
as can be seen from the above table, compared with the prior art, the fishway outlet structure suitable for large water level amplitude variation and the fish passing method thereof have the advantages of small occupied width space, good water retaining structure stability, short length of the high side wall, small engineering quantity, adoption of centralized spiral arrangement of the fishway structure, shallow fishway, good lighting and small difficulty in overhauling, maintenance and observation.
Other parts not described belong to the prior art.
Claims (9)
1. The utility model provides a fishway exit structure that adaptation large water level becomes width of cloth, includes fishway structure (5) and goes out fish mouth (7), its characterized in that: the whole body is in a cuboid or runway type structure; the fishway structure (5) is arranged in the outer side wall (9) in a centralized spiral manner;
the fishway structure (5) comprises a first fishway structure (5.1) and a second fishway structure (5.2); the first fishway structure (5.1) is communicated with the second fishway structure (5.2); the first fishway structure (5.1) is in a certain gradient; the second fishway structure (5.2) is a vertical or round corner turning flat slope structure;
the fish outlet (7) is arranged on the water side of the outer side wall (9); the fish outlet (7) is communicated with the fishway structure (5);
the fishway (11) is communicated with the bottom end of the side surface of the outer side wall (9).
2. The fishway exit structure adapting to large water level amplitude as recited in claim 1, wherein: a fishway baffle (6) is arranged in the first fishway structure (5.1); fishway baffle (6) have a plurality ofly, it is a plurality of fishway baffle (6) are the interval setting.
3. The fishway exit structure adapting to large water level variation as claimed in claim 1 or 2, wherein: the fish outlet (7) comprises a plurality of fish outlet structures (7.1); the fish outlet structures (7.1) are arranged in an overlapping manner; the fish outlet structure (7.1) is communicated with the fishway structure (5).
4. The fishway exit structure adapting to large water level amplitude as recited in claim 3, wherein: an opening and closing machine room (8) is arranged on the water side of the outer side wall (9) and is positioned above the fish outlet (7); the opening and closing machine room (8) is provided with a plurality of opening and closing machine rooms.
5. The fishway exit structure adapting to large water level amplitude as recited in claim 4, wherein: a fishway gate (12) is arranged on the fish outlet structure (7.1); the fishway gate (12) is provided with a plurality of gates.
6. The fishway exit structure adapting to large water level amplitude as recited in claim 5, wherein: a gate storeroom (10) is arranged on the side of the outer side wall (9) close to the water and is positioned beside the fish outlet (7).
7. The fishway exit structure adapting to large water level amplitude variation of claim 6, wherein: the fish outlet (7) is provided with a plurality of rows; the gate storeroom (10) is provided with a plurality of gates.
8. The fish passing method of the fishway outlet structure adapting to the large water level amplitude as recited in any one of claims 1-7, characterized in that: the method comprises the following steps:
the method comprises the following steps: adjusting a fishway gate (12) according to the upstream (4) water level, namely closing the fishway gate (12) below the operating water level and opening the fishway gate (12) above the operating water level;
step two: the water body enters the fishway outlet structure (2) through the fish outlet (7) with corresponding height, spirals in the fishway structure (5), finally flows into the fishway (11) and then enters the downstream (3);
step three: the fish backtrack, after entering fishway outlet structure (2) from fishway (11), the fish backtrack along fishway structure (5) circling, backtrack to go up to go out fishway (7) that upstream (4) water level corresponds, swim out fishway from going out fishway (7).
9. The fish passing method adapting to the fishway outlet structure with large water level amplitude as claimed in claim 8, characterized in that: in the third step, the specific way that the fish spirals up along the fishway structure is as follows: the fish enter the first fishway structure (5.1) from the fishway (11), pass through the second fishway structure (5.2) and then return to the first fishway structure (5.1) in the opposite direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010707949.0A CN111893965A (en) | 2020-07-21 | 2020-07-21 | Fishway outlet structure adapting to large water level amplitude variation and fish passing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010707949.0A CN111893965A (en) | 2020-07-21 | 2020-07-21 | Fishway outlet structure adapting to large water level amplitude variation and fish passing method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11200350A (en) * | 1998-01-06 | 1999-07-27 | Hokoku Kogyo Co Ltd | Automatic fish way gate |
| KR100918452B1 (en) * | 2008-12-26 | 2009-09-24 | 보은군 | Fish road attached to the floodgate |
| CN107700441A (en) * | 2017-11-21 | 2018-02-16 | 中国电建集团成都勘测设计研究院有限公司 | Compound fish channel structure on Narrow Valleys landform dam |
| CN107700442A (en) * | 2017-11-21 | 2018-02-16 | 中国电建集团成都勘测设计研究院有限公司 | Export structure for fish pass system |
| CN107975016A (en) * | 2017-11-21 | 2018-05-01 | 中国电建集团成都勘测设计研究院有限公司 | Compound fish pass system on Narrow Valleys landform dam |
| CN110468805A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of fish pass becomes the tower more imports of radial spi or multiple exit structure |
| CN110468807A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of more imports of fish pass or multiple exit concentration are arranged in juxtaposition structure |
| CN110468806A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of fish pass import or export structure being layered fish |
-
2020
- 2020-07-21 CN CN202010707949.0A patent/CN111893965A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11200350A (en) * | 1998-01-06 | 1999-07-27 | Hokoku Kogyo Co Ltd | Automatic fish way gate |
| KR100918452B1 (en) * | 2008-12-26 | 2009-09-24 | 보은군 | Fish road attached to the floodgate |
| CN107700441A (en) * | 2017-11-21 | 2018-02-16 | 中国电建集团成都勘测设计研究院有限公司 | Compound fish channel structure on Narrow Valleys landform dam |
| CN107700442A (en) * | 2017-11-21 | 2018-02-16 | 中国电建集团成都勘测设计研究院有限公司 | Export structure for fish pass system |
| CN107975016A (en) * | 2017-11-21 | 2018-05-01 | 中国电建集团成都勘测设计研究院有限公司 | Compound fish pass system on Narrow Valleys landform dam |
| CN110468805A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of fish pass becomes the tower more imports of radial spi or multiple exit structure |
| CN110468807A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of more imports of fish pass or multiple exit concentration are arranged in juxtaposition structure |
| CN110468806A (en) * | 2019-07-09 | 2019-11-19 | 中国电建集团华东勘测设计研究院有限公司 | A kind of fish pass import or export structure being layered fish |
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Application publication date: 20201106 |