CN215052763U

CN215052763U - Power station fishway system

Info

Publication number: CN215052763U
Application number: CN202120720307.4U
Authority: CN
Inventors: 刘钊
Original assignee: Zhensha Hydropower Construction Management Branch Of Guoneng Dadu River Basin Hydropower Development Co ltd
Current assignee: Zhensha Hydropower Construction Management Branch Of Guoneng Dadu River Basin Hydropower Development Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-12-07
Anticipated expiration: 2031-04-08

Abstract

The utility model belongs to the technical field of fishway, and discloses a hydropower station fishway system, which comprises a first fishway, a second fishway, a first fishway inlet, a second fishway inlet, a fishway outlet and a third fishway; the first fishway inlet is arranged on one side of the downstream of the hydropower station dam and is connected with the upstream inlet of the first fishway; the first fishway is arranged on the downstream side of the hydropower station dam and arranged along the length direction of the hydropower station dam, and an upstream outlet of the first fishway is connected with an upstream inlet of the second fishway; the second fishway is arranged in a reverse-folded structure, and one side of the second fishway, which is close to the downstream, is provided with the second fishway inlet. The utility model discloses the great and comparatively difficult problem of tracing to up that leads to of the difference in height of the up-stream and down-stream that effectively solves can solve because of the water level change of the down-stream frequently leads to switching the difficult problem between the fishway import control gate, and the different regional fish of also being convenient for get into the fishway, and it is comparatively easy to trace to up.

Description

Power station fishway system

Technical Field

The utility model belongs to the technical field of the fishway, concretely relates to power station fishway system.

Background

Fishways, which are passages for fish migration, are remedied by human activities that destroy the passages for fish migration, and the habits of the fish are generally protected by building artificial water troughs on floodgates or dams. In a hydropower station hub, a fishway needs to be built depending on a hydropower station.

Most of fishway structures of the existing hydropower station fishway system are linear structures in a single direction, and because most of hydropower stations are built at positions with relatively large height difference of river topography, and an upstream section and a downstream section divided by a hydropower station dam have large height difference, the fishway in the linear structure in the single direction can make the upward tracing of fishes difficult; moreover, the inlet of the fishway is positioned at the downstream, the downstream water level changes frequently, the switching between the fishway inlet control gates is difficult, and even the situation that the water level changes before the gate switching is finished exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pair of power station fishway system, the fishway structure of solving current fishway system is unfavorable for the problem that fish traced upward.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a hydropower station fishway system comprises a first fishway, a second fishway, a first fishway inlet, a second fishway inlet, a fishway outlet and a third fishway;

the first fishway inlet is arranged on one side of the downstream of the hydropower station dam and is connected with the upstream inlet of the first fishway; the first fishway is arranged on the downstream side of the hydropower station dam and arranged along the length direction of the hydropower station dam, and an upstream outlet of the first fishway is connected with an upstream inlet of the second fishway; the second fishway is arranged in a reverse structure, one side of the second fishway, which is close to the downstream, is provided with a second fishway inlet, and the upstream outlet of the second fishway is connected with the upstream inlet of the third fishway; the third fishway extends in the upstream direction, and an outlet of the third fishway is arranged on the upstream fishway;

the third fishway is provided with a regulating pond, the regulating pond is provided with an overflow port, the inlet of the second fishway is provided with a drop fish luring and supplementing channel, and the drop fish luring and supplementing channel is connected with the overflow port through a water supplementing pipe.

In a possible implementation manner, the water drop outlet of the water drop fish luring and supplementing ditch is of a step-shaped structure.

In a possible implementation manner, the first fishway, the second fishway and the third fishway are all vertical seam fishways, and each fishway is provided with at least one rest pool.

In a possible implementation mode, the rest pool comprises a pool body, a first vertical seam component, a second vertical seam component and a rectifying plate, the pool body is sequentially provided with the first vertical seam component and the second vertical seam component along the length direction of the pool body, and the first vertical seam component and the second vertical seam component are mutually spaced and the rectifying plate is arranged between the first vertical seam component and the second vertical seam component.

In a possible implementation mode, the first perps component and the second perps component respectively comprise a partition plate and a guide plate which can form a fish perps, the rectifying plate is arranged between the partition plates of the two perps components, and the end head of the rectifying plate is arc-shaped.

In a possible implementation manner, the regulating reservoir comprises an upstream deep water section and a downstream shallow water section, and an overflow section between the deep water section and the shallow water section, and two side walls of the overflow section are provided with the overflow ports.

In a possible implementation, the first fishway is a fish collecting corridor, and the bottom gradient of the fish collecting corridor is 0%.

In a possible implementation manner, the height of each level of the return section of the second fishway decreases from the upstream direction to the downstream direction.

In a possible implementation, a viewing chamber is also provided at the entrance of the second fishway.

The utility model has the advantages that:

the utility model discloses a fishway downstreams section is through setting up to the inflection structure, the great problem of tracing to comparatively difficult that leads to of the upstream and downstream difference of height that can effectively solve to through setting up two fishway imports, one is as main import, and another is as supplementary import, can solve because of the downstream water level changes frequently and leads to switching the difficult problem between the fishway import control gate, and the different regional fish of also being convenient for get into the fishway, and it is comparatively easy to trace to.

And the water drop fish luring and supplementing channel is arranged at the first fishway inlet, the upstream overflow is used as fish luring water flow and is introduced into the water drop fish luring and supplementing channel, and the water is supplemented to the local water area where the second fishway inlet which is used as the main inlet is located, so that the fish luring and collecting effect of the peripheral area of the fishway inlet is improved.

Simultaneously, the rest pond that every fishway set up can supply the fish rest of tracing to, and the rest pond through two perps component with be located the cowling panel between two perps components, can strengthen the guide effect to the mainstream in the rest pond, the mainstream takes place to deflect to the right side under the cowling panel effect, do not have the rivers phenomenon of assaulting the left wall once more, reach the anticipated effect of flow state adjustment, and the mainstream velocity of flow is 0.4 ~ 1.2m/s, satisfy to move back fish and trace to demand and rest demand.

Drawings

Fig. 1 is a plan view of a fishway system of a hydropower station according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a plan view of a second fishway inlet of a fishway system of a hydropower station according to an embodiment of the application;

fig. 4 is a diagram of a fishway plan structure of a fishway system of a hydropower station according to an embodiment of the application;

fig. 5 is a plan view of a resting pool of a fishway system of a hydropower station according to an embodiment of the application;

fig. 6 is a diagram illustrating a result of calculating a streamline of a rest pool of a fishway system of a hydropower station according to an embodiment of the present application.

In the figure: 1-a hydroelectric dam; 2-a second fishway inlet; 3-a first fishway; 4-a first fishway inlet; 5-a second fishway; 6-third fishway; 7-fishway outlet; 8-a regulating tank; 9-retaining wall; 10-drop fish luring and water replenishing channel; 11-a viewing chamber; 12-a water replenishing pipe; 13-a rest pool; 14-a separator; 15-a guide plate; 16-rectifying plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

The embodiment of the application provides a power station fishway system, it is based on power station pivot setting for going up to tracing to of fish.

Referring to fig. 1-3, the fishway system of the hydropower station of this embodiment may include a first fishway 3, a second fishway 5, a first fishway inlet 4, a second fishway inlet 2, a fishway outlet 7, and a third fishway 6, where each fishway of the fishway system is communicated with each other, and the first fishway inlet 4, the second fishway inlet 2, and the fishway outlet 7 provide fish to enter the fishway and go out of the fishway.

In the embodiment of the application, the first fishway inlet 4 is arranged on the downstream side of the hydropower station dam 1 and is connected with the upstream inlet of the first fishway 3; the first fishway 3 is arranged on the downstream side of the hydropower station dam 1 and is arranged along the length direction of the hydropower station dam 1, and an upstream outlet of the first fishway 3 is connected with an upstream inlet of the second fishway 5; the second fishway 5 is arranged in a reverse structure, one side of the second fishway adjacent to the downstream is provided with the second fishway inlet 2, and the upstream outlet of the second fishway 5 is connected with the upstream inlet of the third fishway 6; the third fishway 6 extends in the upstream direction and is provided with the fishway outlet 7 upstream of the exit.

The fishway is provided with two inlets, namely a second fishway inlet 2 serving as a main inlet and a first fishway inlet 4 serving as an auxiliary inlet, the second fishway 5 is arranged at one end of the hydropower station dam 1 in a reverse structure, and the gradient of the fishway can be greatly reduced through the reverse structure, so that the upstream tracing of fishes is facilitated, and the problem of difficult upstream tracing caused by large height difference between the upstream and the downstream is effectively solved; the second fishway inlet 2 as a main inlet is arranged at one side of the second fishway 5 close to the downstream, and the fishes in the water area can enter the second water channel through the second fishway inlet 2 and then enter the third water channel; it sets up the middle part position that is close to low reaches one side at the power station as the first fishway import 4 of supplementary import, and it is main through the first fishway 3 intercommunication second fishway 5 that arranges along power station length direction to solve because of the frequent problem that leads to switching difficulty between the fishway import control gate of downstream water level change, also be convenient for different regional fishes get into the fishway, it is comparatively easy to trace up. In some embodiments, a retaining wall 9 is disposed on the downstream side of the second fishway 5.

Referring to fig. 4, each fishway structure is a vertical seam type fishway.

In the embodiment of the present application, please refer to fig. 1 and fig. 3, the third fishway 6 is provided with an adjusting tank 8, the adjusting tank 8 is provided with an overflow port, the second fishway inlet 2 is provided with a drop fish-luring and water-replenishing channel 10, and the drop fish-luring and water-replenishing channel 10 is connected to the overflow port through a water-replenishing pipe 12. The water drop fish luring and supplementing channel 10 supplements water from the left bank of the fishway inlet to form water drop, can form fish luring water flow with large bottom flow rate and relatively small surface flow rate on the right bank of the fishway inlet, and has certain fish luring effect for fish passing objects on the middle and bottom layers.

The water drop fish attracting and supplementing channel 10 is arranged at the first fishway inlet 4, the upstream overflow is used as fish attracting water flow and is introduced into the water drop fish attracting and supplementing channel 10, and water supplementing is carried out on the local water area where the second fishway inlet 2 which is used as a main inlet is located, so that the fish attracting and collecting effect of the peripheral area of the fishway inlet is improved.

In some embodiments of the present invention, the outlet of the drop inducing and compensating canal 10 is a step-like structure. In order to further improve the horizontal flow velocity of the surface layer, the falling lower part is set to be step-shaped, and falling water flow achieves the effect of increasing the horizontal flow velocity of the surface layer through impacting the step.

The first fishway 3, the second fishway 5 and the third fishway 6 in the embodiment of the application are all vertical seam fishways, and each fishway is provided with at least one rest pool 13. The rest pool 13 can provide water flow convenient for rest when fishes go up. In the specific implementation process, a rest pool 13 can be arranged according to the level difference of 4 m-5 m.

In some embodiments, the resting tank 13 includes a tank body, a first vertical seam member, a second vertical seam member and a current plate 16, the first vertical seam member and the second vertical seam member are sequentially arranged on the tank body along the length direction of the tank body, the first vertical seam member and the second vertical seam member are spaced from each other, and the current plate 16 is arranged between the first vertical seam member and the second vertical seam member. Wherein, first perps component and second perps component structure are the same and mutual interval sets up, and cowling panel 16 then sets up in the centre of two perps components, through the setting of this cowling panel 16, can make and to strengthen the guide effect to the main current in the rest pond 13 to form the basin that can supply fish to have a rest temporarily.

Specifically, as shown in fig. 5, each of the first and second perps includes a partition 14 and a guide 15, which can form a fish perp, the rectifying plate 16 is disposed between the partitions 14 of the two perps, and the ends of the rectifying plate 16 are arc-shaped. The arrangement of the components of the rest room can ensure that the water flow in the rest room has the functions of facilitating rest and guiding.

Referring to fig. 6, the calculation basis of the streamline calculation result graph is as follows: a rectifying plate 16 is additionally arranged at the position (apart from the partition plate 142.275m) of the pool length 1/2 downstream of the partition plate 14, the length of the rectifying plate 16 is 0.5m, the thickness of the rectifying plate is 0.25m, the pier head is circular, and the radius of the pier head is 0.125m, as shown in FIG. 5. The calculation result of fig. 6 shows that after the rectifying plate 16 is additionally arranged at the position 1/2 on the downstream side of the partition plate 14 of the rest pool 13, the guiding effect of the rectifying plate 16 on the main stream in the rest pool 13 is obviously enhanced, the main stream deflects to the right side under the effect of the rectifying plate 16, the phenomenon of water flow impacting the left side wall again does not exist, the expected effect of flow state adjustment is achieved, the flow rate of the main stream is 0.4-1.2 m/s, and the upstream tracing requirement of the migratory fishes is met.

The adjusting pool 8 of the fishway system of the hydropower station can comprise an upstream deep water section, a downstream shallow water section and an overflow section between the deep water section and the shallow water section, and two side walls of the overflow section are provided with overflow ports. The adjusting tank 8 is connected with the deep water section and the shallow water section of the fishway, and plays a role in transition adjustment between the deep water section and the shallow water section. Fishway deep water section and shallow water section, the running water depth has great difference, for guaranteeing both the smooth-going linking of surface of water, the velocity of flow is stable, does not produce rivers with higher speed, has set up the overflow mouth at overflow section both sides boundary wall.

The fishway does not need gate control during operation, only the maintenance gate needs to be reserved for fishway maintenance, the operating water depth of the fishway section at the upstream of the regulating pool 8 is synchronously changed along with the change of the upstream water level, and the water flow velocity of each vertical seam section is always kept unchanged; and 8 downstream fishway sections of equalizing basin are spilled over from the overflow weir because of unnecessary water to can keep fixed depth of water and velocity of flow all the time, like this, under the prerequisite that the operating depth of water and velocity of flow all satisfied the design requirement in guaranteeing fishway upper reaches section (including 7 sections of fishway export, equalizing basin 8 and the fairly long distance fishway sections in low reaches), adapted to the upper reaches reservoir area water level and become width of cloth, realized the non-brake control, improved operating efficiency. In addition, the water flow overflowing from the regulating pool 8 can be used for attracting fish and replenishing water at the inlet section of the downstream fishway after connection and transition.

In some embodiments of the present application, the first fishway 3 is a fish-collecting corridor, and the bottom gradient of the fish-collecting corridor is 0%. The fish collecting corridor with the gradient can better attract fishes to go up, and the fishes can easily enter the corridor.

In some embodiments of the present invention, as shown in fig. 2, the height of each of the folded sections of the second fishway 5 decreases from the upstream to the downstream direction. The height setting mode can make the inflection structure effectively reduce the difficulty of the fish tracing upwards, so that the fish tracing upwards is easier.

In some embodiments of the present embodiment, as shown in fig. 3, a viewing chamber 11 is further disposed at the second fishway inlet 2. The observation chamber 11 can facilitate observation of the situation that the upstream fishes enter the water channel.

In some specific implementation manners of the embodiments of the present application, the water replenishing pipe is a DN300 steel pipe.

Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power station fishway system which is characterized in that: comprises a first fishway (3), a second fishway (5), a first fishway inlet (4), a second fishway inlet (2), a fishway outlet (7) and a third fishway (6);

the first fishway inlet (4) is arranged on one side of the downstream of the hydropower station dam (1) and is connected with the upstream inlet of the first fishway (3); the first fishway (3) is arranged on the downstream side of the hydropower station dam (1) and is arranged along the length direction of the hydropower station dam (1), and an upstream outlet of the first fishway (3) is connected with an upstream inlet of the second fishway (5); the second fishway (5) is arranged in a reverse structure, one side of the second fishway, which is close to the downstream, is provided with the second fishway inlet (2), and the upstream outlet of the second fishway (5) is connected with the upstream inlet of the third fishway (6); the third fishway (6) extends in the upstream direction, and the fishway outlet (7) is arranged on the upstream fishway;

wherein, third fishway (6) are equipped with equalizing basin (8), equalizing basin (8) are equipped with the overflow mouth, second fishway import (2) department is equipped with drop lures fish to mend ditch (10), drop lures fish to mend ditch (10) through moisturizing pipe (12) with the overflow mouth is connected.

2. A fish way system for a hydroelectric power station according to claim 1, wherein: the water dropping outlet of the water dropping fish luring and supplementing channel (10) is of a step-shaped structure.

3. A fish way system for a hydroelectric power station according to claim 1, wherein: the first fishway (3), the second fishway (5) and the third fishway (6) are all vertical seam fishways, and each fishway is at least provided with a rest pool (13).

4. A fish way system for a hydroelectric power station according to claim 3, wherein: rest pond (13) include cell body, first perps component, second perps component and cowling panel (16), the cell body sets gradually along its length direction first perps component and second perps component, first perps component and second perps component are spaced each other and set up between the two cowling panel (16).

5. The fish way system of a hydropower station according to claim 4, wherein: first perps component and second perps component all include baffle (14) and baffle (15) that can constitute the fish perps, set up between baffle (14) of two perps components cowling panel (16), the end of cowling panel (16) is the arc.

6. A hydroelectric fishway system according to any of claims 1 to 5, comprising: the adjusting tank (8) comprises an upstream deep water section, a downstream shallow water section and an overflow section between the deep water section and the shallow water section, and the overflow ports are formed in the side walls of two sides of the overflow section.

7. A fish way system for a hydroelectric power station according to claim 1, wherein: the first fishway (3) is a fish collecting corridor, and the bottom gradient of the fish collecting corridor is 0%.

8. A fish way system for a hydroelectric power station according to claim 1, wherein: the height of each level of the reverse sections of the second fishway (5) is gradually reduced from the upstream direction to the downstream direction.

9. A fish way system for a hydroelectric power station according to claim 1, wherein: an observation room (11) is arranged at the second fishway inlet (2)

10. A fish way system for a hydroelectric power station according to claim 1, wherein: the water supplementing pipe is a DN300 steel pipe.