CN110616694A - Combined water diversion ditch - Google Patents
Combined water diversion ditch Download PDFInfo
- Publication number
- CN110616694A CN110616694A CN201910869837.2A CN201910869837A CN110616694A CN 110616694 A CN110616694 A CN 110616694A CN 201910869837 A CN201910869837 A CN 201910869837A CN 110616694 A CN110616694 A CN 110616694A
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- CN
- China
- Prior art keywords
- flow limiting
- limiting plate
- water
- channel
- diversion
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
-
- 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)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
A combined type diversion canal comprises a diversion canal body and a plurality of flow limiting plates arranged in the diversion canal body, wherein the upstream of the diversion canal body is a diversion area, the midstream is a working area, and the downstream is a drainage area; the flow limiting plates are vertically arranged in the diversion canal body and divide a water channel of the diversion canal body into a plurality of water pools, wherein the flow limiting plates are parallel to each other, and the height of the upper edge of each flow limiting plate is lower than that of the upper edge of the water channel; a concave notch is formed in the top of the flow limiting plate, so that a notch overflow weir is formed on the upper edge of the flow limiting plate; the middle part of the flow limiting plate is provided with a middle channel, wherein the gap and the middle channel are respectively arranged at two sides of the vertical central shaft of the flow limiting plate, and the flow limiting plate is divided into two types of opposite alignment or staggered alignment according to the arrangement mode of the gap. The invention has the beneficial effects that: simple structure, easy preparation, convenient maintenance, economy, small occupied area and excellent hydraulic characteristic, and can generate turbulent fluctuation areas and vortex areas required by fish migration.
Description
Technical Field
The invention relates to a combined type water diversion canal.
Background
Due to the construction of dams, the propagation of migratory fishes is hindered, even some fishes are endangered to be extinct, and in order to maintain the diversity of organisms, a fishway is usually arranged in a water conservancy project so as to achieve the purpose of harmonious development of water resource development and ecological environment. Statistics have shown that in fishways established around the world, less than half of the fishways through which fish can swim back are available. The hydraulic characteristics of the fishway pond chamber are related to the upstream habits of the fishes, different fish passing holes have different fish passing effects, and the fishes are not simply provided with holes, so that the fishes can be traced up along the holes in a gentle and smooth manner. Therefore, the consideration of ecological hydraulic characteristics of fishways is added in the design, and is another focus of the current fishway design.
Disclosure of Invention
In order to solve the problems, the invention provides a combined diversion canal capable of generating a turbulent area and a vortex area required by fish migration.
The invention relates to a combined diversion canal, which is characterized in that: the water diversion channel comprises a water diversion channel body and a plurality of flow limiting plates arranged in the water diversion channel body, wherein the upstream of the water diversion channel body is a water diversion area, the midstream is a working area, and the downstream is a water drainage area; the flow limiting plates are vertically arranged in the diversion canal body and divide a water channel of the diversion canal body into a plurality of water pools, wherein the flow limiting plates are parallel to each other, and the height of the upper edge of each flow limiting plate is lower than that of the upper edge of the water channel; a concave notch is formed in the top of the flow limiting plate, so that a notch overflow weir is formed on the upper edge of the flow limiting plate; the middle part of the flow limiting plate is provided with a middle channel, wherein the gaps and the middle channel are respectively arranged at two sides of a vertical central shaft of the flow limiting plate, the flow limiting plate is divided into two types of opposite alignment or staggered alignment according to the arrangement mode of the gaps, and the opposite alignment means that the orthographic projections of the gaps on a plane parallel to the flow limiting plate are overlapped; the staggered mode refers to that the orthographic projections of the gaps of two adjacent flow limiting plates on a plane parallel to the flow limiting plates are staggered.
The notch and the middle channel are both rectangular structures, wherein one side of the notch is superposed with the vertical central axis of the current limiting plate, and the long side of the middle channel is parallel to the vertical central axis of the current limiting plate.
The water channel bottom plate clamped between the most upstream flow limiting plate and the most downstream flow limiting plate is a stepped bottom plate, the height of the step of the stepped bottom plate is gradually reduced along the water flow direction, and a flow limiting plate is correspondingly assembled at the joint of two adjacent steps.
The method is characterized in that the upstream tracing habits and swimming capacities of different fishes during migration are considered, the fishes inhabit different water layers due to different food requirements, and the like, and compared with the fishes only suitable for middle-layer and lower-layer migration in a single orifice type fishway fish passing hole, a single weir flow type fishway fish passing hole is only suitable for the fishes preferring to migrate in the surface layer and have jumping habits, a notch weir and rectangular middle-hole combined fishway fish passing hole is designed to provide favorable conditions for upstream tracing migration of the fishes with different water-loving layers, so that a migration fish group is guided to smoothly trace to spawn in rivers and lakes or perform rope fattening on baits through the fishway, the diversity of upstream water system organisms is maintained, and the harmonious development of water resource development and ecological environment is promoted.
The invention has the beneficial effects that: the device has the advantages of simple structure, easy manufacture, convenient maintenance, economy, small occupied area, excellent hydraulic property and capability of generating turbulent fluctuation areas and vortex areas required by fish migration; compared with a single orifice type fishway fish passing hole which is only suitable for fishes tracing at the middle and lower layers, and a single weir flow type fishway fish passing hole which is only suitable for fishes loving migration and jumping habits on the surface layer, the notch weir and the orifice combined fishway fish passing hole can better exert the hydraulic characteristics of the orifice and the notch weir, and the water flow passing through the notch weir is a three-dimensional weir flow; the water flow passing through the rectangular middle hole is three-dimensional jet flow, so that the water flow in the whole water channel has three-dimensional weir flow and three-dimensional jet flow, can adapt to the upstream habits of different fishes, and has higher applicability.
Drawings
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a structural view of a restrictor plate of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
With reference to the accompanying drawings:
embodiment 1 the invention relates to a combined type diversion canal, which comprises a diversion canal body 1 and a plurality of flow limiting plates 2 arranged in the diversion canal body, wherein the upstream of the diversion canal body is a diversion area 13, the midstream is a working area 14, the downstream is a drainage area 15, the diversion area is provided with a water inlet 11 with a control valve, and the tail end of the drainage area is provided with a drainage weir 12; the flow limiting plates 2 are vertically arranged in the diversion canal body 1 to divide the water channel of the diversion canal body 1 into a plurality of water pools, wherein the flow limiting plates 2 are parallel to each other, and the height of the upper edges of the flow limiting plates 2 is lower than that of the upper edges of the water channel; a concave notch 21 is formed in the top of the flow limiting plate 2, so that a notch overflow weir is formed on the upper edge of the flow limiting plate; the middle part of the flow limiting plate 2 is provided with a middle channel 22, wherein the gap 21 and the middle channel are respectively arranged at two sides of a vertical central shaft 23 of the flow limiting plate 2, the flow limiting plate is divided into two types of opposite alignment or staggered alignment according to the arrangement mode of the gap, and the opposite alignment means that the orthographic projections of the gap on a plane parallel to the flow limiting plate are overlapped; the staggered mode refers to that the orthographic projections of the gaps of two adjacent flow limiting plates on a plane parallel to the flow limiting plates are staggered.
The gap and the middle channel are both rectangular structures and are used as fish channels, wherein one side of the gap is superposed with the vertical central axis of the current-limiting plate, and the long side of the middle channel is parallel to the vertical central axis of the current-limiting plate.
The water channel bottom plate clamped between the most upstream flow limiting plate and the most downstream flow limiting plate is a stepped bottom plate 16, the height of the step of the stepped bottom plate is gradually reduced along the water flow direction, and a flow limiting plate is correspondingly arranged at the joint of two adjacent steps.
The method is characterized in that the upstream tracing habits and swimming capacities of different fishes during migration are considered, the fishes inhabit different water layers due to different food requirements, and the like, and compared with the fishes only suitable for middle-layer and lower-layer migration in a single orifice type fishway fish passing hole, a single weir flow type fishway fish passing hole is only suitable for the fishes preferring to migrate in the surface layer and have jumping habits, a notch weir and rectangular middle-hole combined fishway fish passing hole is designed to provide favorable conditions for upstream tracing migration of the fishes with different water-loving layers, so that a migration fish group is guided to smoothly trace to spawn in rivers and lakes or perform rope fattening on baits through the fishway, the diversity of upstream water system organisms is maintained, and the harmonious development of water resource development and ecological environment is promoted.
Embodiment 2 in the combined type diversion canal of the invention, the diversion canal body 1 is a large glass water tank, the width B of the test glass water tank is 600mm, and the length of the test water tank is 1800 mm. The vertical central shaft of the restrictor plate is taken as a reference line, a rectangular notch 21 is arranged on one side of the vertical central shaft, and a middle channel 22 is arranged on the other side of the vertical central shaft of the clapboard.
And the delta H is the slope of the weir head.
The size of the notch 21 is set to be 200mm multiplied by 150mm, the center of the notch 21 is 100mm away from the vertical center line of the baffle plate, the size of the middle channel 22 is set to be 160mm multiplied by 240mm, the center of the middle channel 22 is 100mm away from the vertical center axis of the restrictor plate, and the bottom edge of the middle channel 22 is 130mm away from the lower edge of the restrictor plate. In the arrangement mode, the water tanks are arranged according to different sides and/or the same side of adjacent flow limiting plates on the upstream and the downstream of the water tank. The same flow passes through the special diversion canal structure, and different turbulence areas and vortex areas required by fish migration are generated in different arrangement modes, so that different ecological hydraulic conditions are provided for the fishes.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (3)
1. A combined diversion canal is characterized in that: the water diversion channel comprises a water diversion channel body and a plurality of flow limiting plates arranged in the water diversion channel body, wherein the upstream of the water diversion channel body is a water diversion area, the midstream is a working area, and the downstream is a water drainage area; the flow limiting plates are vertically arranged in the diversion canal body and divide a water channel of the diversion canal body into a plurality of water pools, wherein the flow limiting plates are parallel to each other, and the height of the upper edge of each flow limiting plate is lower than that of the upper edge of the water channel; a concave notch is formed in the top of the flow limiting plate, so that a notch overflow weir is formed on the upper edge of the flow limiting plate; the middle part of the flow limiting plate is provided with a middle channel, wherein the gaps and the middle channel are respectively arranged at two sides of a vertical central shaft of the flow limiting plate, the flow limiting plate is divided into two types of opposite alignment or staggered alignment according to the arrangement mode of the gaps, and the opposite alignment means that the orthographic projections of the gaps on a plane parallel to the flow limiting plate are overlapped; the staggered mode refers to that the orthographic projections of the gaps of two adjacent flow limiting plates on a plane parallel to the flow limiting plates are staggered.
2. A combined penstock as claimed in claim 1, wherein: the notch and the middle channel are both rectangular structures, wherein one side of the notch is superposed with the vertical central axis of the current limiting plate, and the long side of the middle channel is parallel to the vertical central axis of the current limiting plate.
3. A combined penstock as claimed in claim 1, wherein: the water channel bottom plate clamped between the most upstream flow limiting plate and the most downstream flow limiting plate is a stepped bottom plate, the height of the step of the stepped bottom plate is gradually reduced along the water flow direction, and a flow limiting plate is correspondingly assembled at the joint of two adjacent steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869837.2A CN110616694A (en) | 2019-09-16 | 2019-09-16 | Combined water diversion ditch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869837.2A CN110616694A (en) | 2019-09-16 | 2019-09-16 | Combined water diversion ditch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110616694A true CN110616694A (en) | 2019-12-27 |
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ID=68922958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910869837.2A Pending CN110616694A (en) | 2019-09-16 | 2019-09-16 | Combined water diversion ditch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110616694A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370036A (en) * | 2022-02-16 | 2022-04-19 | 重庆交通大学 | Novel fishway structure of key weir combination orifice formula |
-
2019
- 2019-09-16 CN CN201910869837.2A patent/CN110616694A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114370036A (en) * | 2022-02-16 | 2022-04-19 | 重庆交通大学 | Novel fishway structure of key weir combination orifice formula |
| CN114370036B (en) * | 2022-02-16 | 2024-04-12 | 重庆交通大学 | Novel fishway structure of key weir combination drill way formula |
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