CN116289815A - Overflow structure capable of automatically adjusting water depth in vertical joint type fishway - Google Patents
Overflow structure capable of automatically adjusting water depth in vertical joint type fishway Download PDFInfo
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- CN116289815A CN116289815A CN202310542393.8A CN202310542393A CN116289815A CN 116289815 A CN116289815 A CN 116289815A CN 202310542393 A CN202310542393 A CN 202310542393A CN 116289815 A CN116289815 A CN 116289815A
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- 238000005381 potential energy Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
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- 241000251468 Actinopterygii Species 0.000 abstract description 8
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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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- 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
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for 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
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Abstract
The invention discloses an overflow structure capable of automatically adjusting the depth of water in a vertical joint type fishway, which relates to the technical field of hydraulic engineering construction, and comprises a plurality of stages of overflow joints which are connected in series, wherein the overflow joint at the head part is connected with a pool chamber of an outlet section of the fishway, the overflow joint at the tail part is connected with a pool chamber of an inlet section of the fishway, and overflow gaps are formed in each stage of overflow joint; and the height difference is formed between the adjacent overflow gaps, so that the water depth of each stage of overflow joint is gradually reduced along the direction from the fishway outlet section pool chamber to the fishway inlet section pool chamber. According to the overflow structure, the work water in the fishway is adjusted by automatically overflowing redundant flow under the condition of arranging an outlet, so that the drop phenomenon caused by mismatching of upstream water level and downstream water level and water depth of an outlet section being greater than that of an inlet section is eliminated, and the requirement of fish backtracking is met.
Description
Technical Field
The invention relates to the technical field of hydraulic engineering construction, in particular to an overflow structure capable of automatically adjusting the depth of water in a vertical joint type fishway.
Background
In recent years, a vertical joint type fishway is used as an ecological compensation project of a reservoir or a power station and provides a channel for fish migration and reproduction, and has become an important component for water conservancy and hydropower engineering design and construction. When the reservoir or the power station is built and operated, the upstream water level and the downstream water level have certain amplitude, and if the vertical joint type fishway is provided with only one inlet (positioned at the downstream of the reservoir or the power station) and one outlet (positioned at the upstream of the reservoir or the power station), the phenomena of mismatching of the upstream water level and the downstream water level of the fishway and greater water depth of the outlet section than that of the inlet section can occur when the upstream water level is higher during operation.
The phenomenon can cause water flow drop phenomenon in the fishway, the water flow speed is obviously increased, if the water flow speed exceeds the designed water flow speed of the fishway, fish cannot trace up in the fishway, and the fishway cannot play the due function at the moment.
In view of the above, in the design of the vertical seam type fishway, at present, the conventional practice is to set a plurality of outlets and a plurality of inlets according to the variation range of the upstream and downstream running water levels of a reservoir or a power station, which brings the disadvantage that when the fishway is built to run, the variation of the upstream and downstream running water levels is concerned at the required time, one of the outlets and one of the inlets is opened according to the real-time upstream and downstream running water levels, so that the fishway has a plurality of combined modes of the inlet and the outlet of the fishway, and each inlet is frequently opened and closed, and the running is very complicated.
In view of this, the present application is specifically proposed.
Disclosure of Invention
The invention aims to provide an overflow structure capable of automatically adjusting the water depth in a vertical joint type fishway, which can automatically overflow redundant flow and adjust the water depth in the fishway by arranging an outlet, so that the water drop phenomenon caused by unmatched water levels at the upstream and the downstream and the water depth at the outlet section being greater than the water depth at the inlet section is eliminated, and the requirement of fish backtracking is met.
Embodiments of the present invention are implemented as follows:
the overflow structure capable of automatically adjusting the water depth in the vertical seam type fishway comprises a plurality of stages of overflow joints which are connected in series, wherein the overflow joint at the head part is connected with a fishway outlet section pool chamber, the overflow joint at the tail part is connected with a fishway inlet section pool chamber, and each stage of overflow joint is provided with an overflow notch; and the height difference is formed between the adjacent overflow gaps, so that the water depth of each stage of overflow joint is gradually reduced along the direction from the fishway outlet section pool chamber to the fishway inlet section pool chamber.
In an alternative embodiment, the maximum operating water depth of the fishway outlet cell, the target operating water depth of the fishway inlet cell and the height difference of the adjacent overflow indentations satisfy the following relationship:
in the formula (1), H is the maximum running water depth of a pool chamber of the outlet section of the fishway; h is the target running water depth of the fishway inlet section pool chamber; d is the height difference of adjacent overflow gaps; n is a positive integer.
In an alternative embodiment, the height differences between adjacent overflow indentations are equal.
In an alternative embodiment, the height difference is 0.05-0.15m.
In an alternative embodiment, the width of the overflow notch is:
b＝q/(m×(2g) 0.5 ×d 1.5 ) (2)
in the formula (2), b is the width of the overflow notch; q is the overflow flow of each stage of overflow joint; m is a flow coefficient, wherein the flow coefficient of a wide top weir of a bottom bank with an inlet edge being a right angle can be adopted, and 0.32 is taken; g is gravity acceleration, 9.81m/s is taken 2 The method comprises the steps of carrying out a first treatment on the surface of the d is the height difference of the adjacent overflow notch.
In an alternative embodiment, the floor of the overflow joint has a slope calculated by:
i 1 ＝(l 2 ×i 2 -d)/l 1 (3)
in the formula (3), i 1 Is the gradient of the bottom plate; l (L) 2 The length of the pool chamber is the length of the fishway inlet section and the fishway outlet section; i.e 2 Is fishThe bottom plate slopes of the pool chambers of the channel inlet section and the fishway outlet section; l (L) 1 Is the length of the overflow joint; d is the height difference of the adjacent overflow notch.
In an alternative embodiment, the slope form of the floor is divided into a forward slope and a reverse slope.
In an alternative embodiment, a plugboard group is arranged in each stage of overflow joint, the plugboard group comprises a first plugboard and a second plugboard, the first plugboard and the second plugboard are respectively blocked at two side boards of the overflow joint, and a water passing gap is formed between the first plugboard and the second plugboard.
In an alternative embodiment, the side of the first plugboard and the side of the second plugboard, which are close to each other, are provided with energy dissipation parts, and the energy dissipation parts are used for counteracting energy gain generated by potential energy when water flows down.
In an alternative embodiment, the expression of energy gain is:
g＝l 2 ×i 2 (4)
in the formula (4), i 2 The bottom plate gradient of the pool chamber of the fishway inlet section and the fishway outlet section; l (L) 2 Is the length of the pool chamber of the fishway inlet section and the fishway outlet section.
The embodiment of the invention has the beneficial effects that:
according to the overflow structure capable of automatically adjusting the water depth in the vertical joint type fishway, provided by the embodiment of the invention, the overflow gaps are formed in each stage of overflow joint by arranging the multi-stage overflow joints, and the height difference is formed between the adjacent overflow gaps, so that water flows overflow step by step in the direction from the upper flow to the lower flow, and the purpose of automatically adjusting the water depth is achieved; the mode of automatically adjusting the water depth in the vertical seam type fishway simplifies the traditional arrangement mode of arranging a plurality of outlets on the vertical seam type fishway, avoids frequent switching among the outlets after the vertical seam type fishway is built, ensures that the operation mode of the vertical seam type fishway is very simple and convenient, greatly improves the operation efficiency, and provides great guarantee for the vertical seam type fishway to exert the ecological compensation function thereof;
in general, the overflow structure capable of automatically adjusting the water depth in the vertical joint type fishway provided by the embodiment of the invention can automatically overflow redundant flow and adjust the water depth in the fishway, is convenient to construct, does not need human intervention during operation, is not influenced by the downstream operation water level of a reservoir or a power station, and can automatically adapt to the requirements of different upstream operation water levels of the reservoir or the power station.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall top view of an overflow structure provided by an embodiment of the present invention;
FIG. 2 is a front view of an overflow structure according to an embodiment of the present invention;
FIG. 3 is a top view of a portion of an overflow structure according to an embodiment of the invention;
FIG. 4 is a top view of a portion of a second overflow structure according to an embodiment of the invention;
FIG. 5 is a front view of a portion of an overflow structure according to an embodiment of the invention;
fig. 6 is a second front view of a part of an overflow structure according to an embodiment of the invention.
Icon: 1-overflow joint; 2-fishway outlet section Chi Shi; 3-fishway entry segment Chi Shi; 11-overflow notch; 12-a first plugboard; 13-a second board; 14-a bottom plate; 15-side plates; 16-water passing gap; 17-energy dissipation part.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "parallel," "perpendicular," and the like, do not denote that the components are required to be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel than "perpendicular" and does not mean that the structures must be perfectly parallel, but may be slightly tilted.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1-6, an overflow structure capable of automatically adjusting water depth in a vertically-slotted fishway provided by the present embodiment includes a plurality of overflow joints 1 connected in series, wherein the overflow joint 1 at the head position is connected with a fishway outlet section pool chamber 2, the overflow joint 1 at the tail position is connected with a fishway inlet section pool chamber 3, that is, the whole fishway body is composed of the fishway outlet section pool chamber 2 at the head, the overflow joint 1 in the middle and the fishway inlet section pool chamber 3 at the tail, wherein the fishway outlet section pool chamber 2 is used for backtracking fish, the fishway inlet section pool chamber 3 is used for backtracking fish, and the overflow joint 1 is used for adjusting water levels from the fishway outlet section pool chamber 2 to the fishway inlet section pool chamber 3.
Specifically, each level of overflow joint 1 is provided with an overflow notch 11 (for example, the body shape of a single overflow joint 1 is basically consistent with that of a typical pool chamber of a vertical seam type fishway, and only the top end of the middle part of a side wall at one side in the overflow joint pool chamber 1 is provided with the overflow notch 11 for step-by-step overflow), and the overflow notch 11 is used for controlling flow, so that the purpose of controlling the water level in the overflow joint 1 is achieved. The adjacent overflow gaps 11 form a height difference, namely the horizontal height of each overflow 11 is different, so that the water depth of each overflow section 1 is gradually reduced along the direction from the fishway outlet section pool chamber 2 to the fishway inlet section pool chamber 3, and the purpose of reducing the water level is finally achieved.
Through the technical scheme, when the upstream running water level is lower, the water depth of the fishway outlet section pool chamber 2 is shallower, and the overflow flow is less; when the upstream running water level is higher, the water depth of the fishway outlet section pool chamber 2 is deeper, the overflow flow is more, and the required running water depth is automatically obtained in the vertical joint type fishway pool chamber after the overflow is finished. Compared with the prior arrangement mode of configuring a plurality of outlets, the method omits frequent switching among the outlets after the vertical joint type fishway is built, so that the operation mode of the vertical joint type fishway is very simple and convenient, the operation efficiency is greatly improved, and great guarantee is provided for the vertical joint type fishway to exert the ecological compensation function.
On the basis of the scheme, if the flow rates of the fishway outlet section pool chamber 2 and the fishway inlet section pool chamber 3 are required to meet the requirement of the backtracking of the shoal (the height of the overflow notch 11 of the overflow joint 1 at the tail position is consistent with the water depth in the fishway inlet section pool chamber 3 required to be obtained after the overflow is finished), the difference between the water depth of the outlet section pool chamber 2 and the water depth of the fishway inlet section pool chamber 3 is just equal to the overflow water level depth, namely the maximum operation water depth of the fishway outlet section pool chamber 2, the target operation water depth (required operation water depth) of the fishway inlet section pool chamber 3 and the height difference of the adjacent overflow notch 11 meet the following relation:
in the formula (1), H is the maximum running water depth of a pool chamber of the outlet section of the fishway; h is the target running water depth of the fishway inlet section pool chamber; d is the height difference of adjacent overflow gaps; n is a positive integer.
In addition, in order to ensure the stability of each overflow joint 1 when the flow overflows, the height differences between the adjacent overflow gaps 11 are equal, namely, the height differences between the overflow gaps 11 are arranged according to the equal difference, so that the smoothness and stability of the overflow are ensured. On the basis, the height difference is in the range of 0.05-0.15m (the height difference between adjacent overflow gaps 11), for example, 0.1m (the water depth in each overflow joint is configured to be gradually reduced by 0.1m, namely, each overflow joint 1 overflows by 0.1 m), so that the overflow flow in a single overflow joint 1 is prevented from being excessive, and the flow state of water flow in the pool is prevented from being disturbed.
According to the technical scheme, in the embodiment, 1 overflow sections are adopted for the overflow structure, the number of the overflow sections is equal to the maximum operation water depth H (the difference between the highest operation water level at the upstream and the height of the bottom plate of the fishway outlet section pool chamber) of the fishway outlet section pool chamber, the target operation water depth H of the fishway inlet section pool chamber required to be obtained after the overflow is finished is subtracted, and then the difference is divided by the height difference (the step-by-step overflow water depth is 0.1 m). Based on this, the width b of the overflow gap 11 of each stage of overflow joint 1 can be calculated according to the flow coefficient of the bottom ridge wide top weir with the inlet edge being a right angle of 0.32 and the overflow flow of a single (overflow joint 1) pool chamber, for example, the width of the overflow gap is 0.15m in the embodiment, for example, calculated according to the following formula:
b＝q/(m×(2g) 0.5 ×d 1.5 ) (2)
(2)) B is the width of the overflow notch; q is the overflow flow of the overflow joint of each stage; m is a flow coefficient, wherein the flow coefficient of a wide top weir of a bottom bank with an inlet edge being a right angle can be adopted, and 0.32 is taken; g is gravity acceleration, 9.81m/s is taken 2 The method comprises the steps of carrying out a first treatment on the surface of the d is the height difference of the adjacent overflow notch.
In some embodiments, each stage of overflow joint 1 and the typical pool chamber of the vertical seam type fishway (namely the pool chamber of the fishway outlet section 2 and the pool chamber of the fishway inlet section 3) are basically the same in section, and each of the stages of overflow joint 1 and the typical pool chamber of the fishway inlet section is provided with a plugboard group, wherein the plugboard group comprises a first plugboard 12 and a second plugboard 13, the first plugboard 12 and the second plugboard 13 are respectively blocked at two side boards 15 of the overflow joint 1, and a water passing gap 16 is formed between the first plugboard 12 and the second plugboard 13. According to the technical scheme, as the bottom slope of the vertical joint type fishway is steeper, local head loss is generated by continuous plugboard combinations (a long plugboard and a short plugboard are adopted, for example, the first plugboard 12 is a long plugboard, and the second plugboard 13 is a short plugboard), so that energy gain generated by potential energy when water leaks is completely eliminated, and the indoor water depths of all tanks are ensured to be basically equal, and the along-distance flow velocity is basically unchanged. More specifically, the sides of the first plugboard 12 and the second plugboard 13, which are close to each other, are provided with energy dissipation parts 17, and the energy dissipation parts 17 are used for counteracting the energy gain generated by the potential energy when the water flows down. In different embodiments, the energy dissipation part 17 may be a column, a block or a plate with polygonal cross section, so as to ensure that the flow velocity of the water in the tank chamber of the overflow joint 1 is stable and the difference between the water level and the depth is basically constant.
Wherein, the expression of the energy gain is:
g＝l 2 ×i 2 (3)
in the formula (3), i 2 Is the bottom plate gradient of a typical pool chamber (the bottom plate gradient of a pool chamber 2 of a fishway outlet section and a pool chamber 3 of a fishway inlet section); l (L) 2 Is typically the length of the pond chambers (the pond chamber 2 of the fishway outlet section and the pond chamber 3 of the fishway inlet section).
In the present embodiment, the local head loss generated by the combination of the first and second insertion plates 12 and 13 in a single (overflow joint 1) pool chamber will be equal to l 2 ×i 2 . However, the overflow structure overflows the flow step by step, and the water level drop of two adjacent (overflow joint 1) pool chambers is 0.1m, which shows thatThe potential energy generated by the water flow discharged from the pool of the single overflow joint 1 is increased to 0.1m.
On the basis of the above-described solution, if the local head loss l at the first and second insertion plates 12 and 13 is 2 ×i 2 Less than 0.1m, which means that the potential energy of the pool chamber of the overflow joint 1 cannot be completely consumed, the residual potential energy can lead to the increase of the flow velocity, and the fish can not successfully trace. To address this problem, i.e. to fully dissipate the increased potential energy by the local head loss, the slope of the floor 14 of the overflow joint is adjusted, which has a slope calculated by:
i 1 ＝(l 2 ×i 2 -d)/l 1 (4)
in the formula (4), i 1 Is the gradient of the bottom plate; l (L) 2 The length of the pool chamber is the length of the fishway inlet section and the fishway outlet section; i.e 2 The bottom plate gradient of the pool chamber of the fishway inlet section and the fishway outlet section; l (L) 1 Is the length of the overflow joint; d is the height difference of the adjacent overflow notch.
Through the above technical scheme, the gradient of the bottom plate 14 of the overflow joint can be calculated according to the formula (4), and if the calculation result is negative, the bottom plate 14 of the overflow joint 1 is counter-slope, that is, the gradient form of the bottom plate 14 is divided into positive slope and counter-slope.
In summary, the overflow structure capable of automatically adjusting the water depth in the vertical seam type fishway can automatically overflow redundant flow after passing through the dam, and the structure capable of adjusting the water depth in the fishway is basically consistent with the typical pool chamber body of the vertical seam type fishway in the overflow joint 1, is convenient to construct, does not need human intervention during operation, is not influenced by the downstream operation water level of a reservoir or a power station, and can automatically adapt to the requirements of different upstream operation water levels of the reservoir or the power station. The overflow structure eliminates the water drop phenomenon that the water level of the upstream and downstream of the fishway is not matched and the water depth of the outlet section is greater than that of the inlet section in the operation period after the vertical joint type fishway is provided with one outlet, so that the water flow speed always meets the requirement of the fish to trace up, meanwhile, the overflow structure for automatically adjusting the water depth in the vertical joint type fishway simplifies the traditional arrangement mode of arranging a plurality of outlets in the vertical joint type fishway, omits frequent switching between the outlets after the vertical joint type fishway is built, ensures that the operation mode of the vertical joint type fishway is very simple and convenient, greatly improves the operation efficiency, and provides great guarantee for the vertical joint type fishway to exert the ecological compensation function thereof.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and that descriptions of well-known components and processing techniques and procedures are omitted so as not to unnecessarily limit the present invention.
Claims (10)
1. The overflow structure capable of automatically adjusting the water depth in the vertical seam type fishway is characterized by comprising a plurality of stages of overflow joints which are connected in series, wherein the overflow joint at the head part is connected with a fishway outlet section pool chamber, the overflow joint at the tail part is connected with a fishway inlet section pool chamber, and overflow gaps are formed in each stage of overflow joint;
and the adjacent overflow gaps form a height difference, so that the water depth of each overflow joint is gradually reduced along the direction from the fishway outlet section pool chamber to the fishway inlet section pool chamber.
2. The overflow structure capable of automatically adjusting water depth in a vertically slotted fishway according to claim 1, wherein the maximum operating water depth of the fishway outlet section pool chamber, the target operating water depth of the fishway inlet section pool chamber and the height difference between adjacent overflow gaps satisfy the following relationship:
in the formula (1), H is the maximum running water depth of a pool chamber of the outlet section of the fishway; h is the target running water depth of the fishway inlet section pool chamber; d is the height difference of adjacent overflow gaps; n is a positive integer.
3. The overflow structure capable of automatically adjusting the depth of water in a vertically slotted fishway of claim 1, wherein the height differences between adjacent overflow indentations are equal.
4. The overflow structure capable of automatically adjusting the depth of water in a vertically slotted fishway of claim 3, wherein the height difference is 0.05-0.15m.
5. The overflow structure capable of automatically adjusting the water depth in a vertically slotted fishway according to claim 1, wherein the width of the overflow notch is as follows:
b＝q/(m×(2g) 0.5 ×d 1.5 ) (2)
in the formula (2), b is the width of the overflow notch; q is the overflow flow of the overflow joint of each stage; m is a flow coefficient, wherein the flow coefficient of a wide top weir of a bottom bank with an inlet edge being a right angle can be adopted, and 0.32 is taken; g is gravity acceleration, 9.81m/s is taken 2 The method comprises the steps of carrying out a first treatment on the surface of the d is the height difference of the adjacent overflow notch.
6. The automatically adjustable vertical joint fishway overflow structure of any of claims 1-5, wherein the bottom plate of the overflow joint has a slope calculated as:
i 1 ＝(l 2 ×i 2 -d)/l 1 (3)
in the formula (3), i 1 Is the gradient of the bottom plate; l (L) 2 The length of the pool chamber is the length of the fishway inlet section and the fishway outlet section; i.e 2 The bottom plate gradient of the pool chamber of the fishway inlet section and the fishway outlet section; l (L) 1 Is the length of the overflow joint; d is the height difference of the adjacent overflow notch.
7. The overflow structure capable of automatically adjusting the water depth in the vertical joint type fishway according to claim 6,
the method is characterized in that the gradient form of the bottom plate is divided into a positive gradient and a negative gradient.
8. The overflow structure capable of automatically adjusting the water depth in a vertically-slotted fishway according to claim 1, wherein a plugboard group is arranged in each stage of overflow joint, the plugboard group comprises a first plugboard and a second plugboard, the first plugboard and the second plugboard are respectively blocked at two side boards of the overflow joint, and a water passing gap is formed between the first plugboard and the second plugboard.
9. The overflow structure capable of automatically adjusting water depth in a vertically slotted fishway of claim 8, wherein the sides of the first plugboard and the second plugboard, which are close to each other, are provided with energy dissipation parts, and the energy dissipation parts are used for counteracting energy gain generated by potential energy when water flows down.
10. The overflow structure capable of automatically adjusting water depth in a vertically slotted fishway of claim 9, wherein the energy gain is expressed as:
g＝l 2 ×i 2 (4)
in the formula (4), i 2 The bottom plate gradient of the pool chamber of the fishway inlet section and the fishway outlet section; l (L) 2 Is the length of the pool chamber of the fishway inlet section and the fishway outlet section.
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|---|---|---|---|---|
| JP2006009241A (en) * | 2004-06-21 | 2006-01-12 | Meihou Engineering:Kk | Fishway exit equipment |
| JP3903391B1 (en) * | 2006-07-25 | 2007-04-11 | 福井県土地改良事業団体連合会 | Fishway bulkhead and fishway block and fishway structure |
| CN102747716A (en) * | 2012-07-25 | 2012-10-24 | 中国水电顾问集团成都勘测设计研究院 | Vertical seam type fishway structure |
| CN106049378A (en) * | 2016-07-26 | 2016-10-26 | 中国水利水电科学研究院 | Fishway outlet adapting to water level change and design method |
| CN107044113A (en) * | 2017-04-26 | 2017-08-15 | 中国电建集团西北勘测设计研究院有限公司 | A kind of computational methods of iris type cobblestone fish pass and fish pass |
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2023
- 2023-05-15 CN CN202310542393.8A patent/CN116289815A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006009241A (en) * | 2004-06-21 | 2006-01-12 | Meihou Engineering:Kk | Fishway exit equipment |
| JP3903391B1 (en) * | 2006-07-25 | 2007-04-11 | 福井県土地改良事業団体連合会 | Fishway bulkhead and fishway block and fishway structure |
| CN102747716A (en) * | 2012-07-25 | 2012-10-24 | 中国水电顾问集团成都勘测设计研究院 | Vertical seam type fishway structure |
| CN106049378A (en) * | 2016-07-26 | 2016-10-26 | 中国水利水电科学研究院 | Fishway outlet adapting to water level change and design method |
| CN107044113A (en) * | 2017-04-26 | 2017-08-15 | 中国电建集团西北勘测设计研究院有限公司 | A kind of computational methods of iris type cobblestone fish pass and fish pass |
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