Fish passing system

Abstract

This invention discloses a fish transport system, wherein the fish collection device includes at least one fish collection channel laid in a river channel downstream of a reservoir, and the fish lifting device includes a main track, a secondary track, multiple fish collection boxes, and a cable car lifting device erected between the main track and the secondary track. The main track and the secondary track are respectively laid on the hillsides on both sides of the river channel. The cable car lifting device includes a main tower, a secondary tower, a cable, and a cable car. The main tower is slidably mounted on the main track, and the secondary tower is slidably mounted on the secondary track. The two ends of the cable are respectively connected to the corresponding main tower and secondary tower, and the cable car is slidably mounted on the cable. Multiple fish collection boxes are arranged in the fish collection channel along the extension direction of the fish collection channel. Fish collection boxes are also arranged in the breeding device. The cable car lifting device is used to lift the fish collection boxes corresponding to the fish collection channel through a detachable grip for transport between the fish collection channel and the breeding device, and to lift the fish collection boxes corresponding to the breeding device for transport between the breeding device and the water area of ​​the reservoir.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology in water conservancy and hydropower engineering, and in particular to a fish passage system. Background Technology

[0002] The construction of water conservancy and hydropower projects will lead to changes in the hydrological conditions of rivers. Among the more obvious changes, once the dam is built and a reservoir is formed in the river, the original spawning grounds, feeding grounds and overwintering grounds of fish will be submerged. It will also hinder the migration of fish upstream and downstream of the dam, thus negatively impacting the quantity and diversity of fish resources, and ultimately seriously threatening the survival and reproductive capacity of fish.

[0003] To address the adverse impacts of water conservancy and hydropower project construction on fish, environmental protection departments, water resources management departments, and other relevant departments have required the project developers to implement effective fish protection measures. One such measure is the use of traditional fish lifts to facilitate fish migration from rivers into reservoirs. Traditional fish lifts operate on a single-box collection and single-line reciprocating transport model. In other words, a traditional fish lift can only lift one box of fish at a time, returning to the river for the next transport. This method is inefficient in helping fish migrate. Especially in areas with dense fish populations, overcrowding or escape may occur. Furthermore, traditional fish lifts are large and heavy, posing higher safety risks during the lifting process. Consequently, traditional fish lifts are permanent hydraulic structures, requiring specific topographical and geological conditions, and facing numerous site selection limitations. This restricts the range of fish collection areas, ultimately impacting fish transport efficiency.

[0004] At the same time, after a dam is built to form a reservoir, the water in the reservoir exhibits a vertical temperature stratification phenomenon. Specifically, the water temperature in the upper layer of the reservoir is higher than that in the lower layer, and the water temperature at the bottom of the reservoir is the lowest. Since the water used for power generation by hydroelectric power stations or water discharge from the reservoir is first taken from the middle and lower layers of the reservoir, the temperature of the discharged water will be lower than that of the natural river channel, which will affect downstream agricultural production, fish resources and aquatic ecological environment.

[0005] In addition, traditional fish stocking measures mostly involve transporting fish by car to shore for release. Due to traffic limitations, it is difficult to select suitable waters for artificially bred fish fry to complete their life cycle, resulting in a low survival rate of the released artificially bred fish fry and ultimately affecting the effectiveness of stocking. Summary of the Invention

[0006] This invention discloses a fish transport system to solve the problem of low transport efficiency of traditional fish lifters used after damming and reservoir construction in the background art. To solve the above-mentioned technical problems, this application provides the following technical solution: A fish passage system is provided in the area of ​​a reservoir. The system includes a fish collection device, a fish lifting device, and a propagation device. The fish collection device includes at least one fish collection channel laid in a river channel downstream of the reservoir. The fish collection channel extends along the extension direction of the river channel in a gradually decreasing manner. The fish lifting device includes a main track, a secondary track, multiple fish collection boxes, and a cable car lifting device erected between the main track and the secondary track. The main track and the secondary track are respectively laid on the hillsides on both sides of the river channel. The cable car lifting device includes a main tower, a secondary tower, a cable, and a cable car. The main tower is slidably mounted on the main track, and the secondary tower is slidably mounted on the secondary track. The two ends of the cable are respectively connected to the corresponding main tower and secondary tower. The cable car is mounted on the cable and can slide along the cable. Multiple fish collection boxes are arranged in the fish collection channel along the extension direction of the fish collection channel. Each fish collection box is equipped with a detachable grip for the cable car to pick up and put down. The breeding device is located on the hillside where the main track is located. The breeding device also contains the fish collection box. The cable car lifting device is used to lift the fish collection box corresponding to the fish collection channel through the detachable grip for transmission between the fish collection channel and the breeding device, and to lift the fish collection box corresponding to the breeding device through the detachable grip for transmission between the breeding device and the water area of ​​the reservoir.

[0007] The fish passage system disclosed in this invention has the following technical effects: This invention discloses a fish collection system in which multiple fish collection boxes are arranged along the extending direction of the fish collection channel. Therefore, after one fish collection box is transported away, the fish in the fish collection channel can continue swimming upstream along the channel and be collected by the next fish collection box. Compared to the traditional fish lift system that collects and transports fish using a single-box model, this structure enables continuous fish collection, alleviating the problem of fish easily turning back and swimming away when encountering obstacles, thus reducing the likelihood of fish escaping. If a large number of fish are encountered, the multiple fish collection boxes arranged in the fish collection channel can work together to distribute the collection of potentially large numbers of fish. Because fish can be collected in different collection boxes, it avoids a large number of fish congesting in one space, thus preventing fish from getting injured.

[0008] Meanwhile, the cable car lifting device used in this structure includes a main tower, a secondary tower, cables, and cable cars. During installation, the main and secondary tracks, main towers, and secondary towers can be easily arranged using the slopes on both sides of the river to achieve suspended operation of the cables and cable cars. Because these devices are relatively dispersed, the requirements for construction conditions such as terrain and geology are not high, and there are fewer site selection restrictions. Since multiple fish collection boxes are used to distribute the fish collection load, the fish collection boxes do not need to be large in size, and it is not easy to form a large-sized and heavy structure, thus there is no significant lifting safety risk.

[0009] In addition, this structure uses cable cars to release artificially bred fish fry into the reservoir. Compared with traditional car transportation and shore release, there are fewer restrictions on the release area. Suitable waters for artificially bred fish fry to complete their life cycle can be selected for release, thereby improving the survival rate of artificially bred fish fry after release. Attached Figure Description

[0010] Figures 1 to 3 These are schematic diagrams of the fish passage system disclosed in the embodiments of the present invention from different perspectives.

[0011] Figure 4 This is a schematic diagram of the fish collection box being placed into the fixed frame according to an embodiment of the present invention; Figures 5 to 10 These are partial structural schematic diagrams of the fish passage system disclosed in the embodiments of the present invention.

[0012] Explanation of reference numerals in the attached figures: 100-Fish collecting device, 110-Fish collecting channel, 101-Fish passage pool, 102-Fish passage opening, 103-Isolation section, 1031-Isolation plate, 1032-Circular column, 200-Fish collection equipment, 210-Main track, 220-Secondary track, 230-Fish collection box, 231-Box body, 2311-Box inlet, 232-First gate, 240-Cable car lifting device, 241-Main tower, 242-Secondary tower, 243-Cable, 244-Cable car 300-Propagation device, 310-Sorting pool, 320-Broodstock pool, 330-Breeding workshop, 340-Release pool, 350-Fish guide pipe, 360-Fish release valve, 370-Clean water pool, 380-Sewage pool, 390-Heat exchange structure, 391-First heat exchange pool, 392-First heat exchange tube, 393-Second heat exchange pool, 394-Second heat exchange tube. 400-Fixed frame, 410-Positioning compartment, 411-Positioning compartment inlet, 420-Second gate, 500-bubble curtain generator 610 - Water intake pipe, 620 - Water delivery pipe, 630 - Reversible unit, 640 - Water supply pipe, 650 - Water discharge pipe 700 - Decoupling rigging. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0014] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0015] Traditional technology uses fish lifts to transport fish from downstream river channels into the reservoir, solving the problem of fish being unable to migrate to the reservoir due to dams. Traditional fish lifts are similar to elevators, each with only one fish tank (similar to an elevator car). During the fish transport process, after each transport, the fish lift's tank must return to the collection point for the next collection and transport operation. This single-tank collection method results in low transport efficiency because it cannot continuously collect fish. Furthermore, if the fish lift's tank is not at the collection point (e.g., during transport), fish encountering dams upstream are prone to swimming away and escaping, further contributing to low transport efficiency. Furthermore, the fish in the river swim towards the collection point without any pattern. If a large number of fish happen to be in the collection point when the fish lift's fish tank is at the collection point, the limited space in the fish tank can easily cause congestion, which can lead to fish being injured. Of course, some fish will inevitably escape due to the congestion (i.e., swim in the opposite direction), which will also result in low fish transportation efficiency.

[0016] To improve fish passage capacity and efficiency, traditional fish lifts are large in size, with large and heavy fish tanks, posing significant lifting safety risks. Furthermore, because a fish lift is a large and compact machine, similar to an elevator, it has high requirements for construction conditions such as terrain and geology, and imposes many site selection restrictions. At the same time, the relatively fixed location of the fish tanks also limits the range of suitable fish collection locations.

[0017] In order to solve at least one of the many problems of the traditional fish lifter mentioned above, this invention discloses a fish transfer system. The disclosed fish transfer system is used to transport fish in the downstream river channel of a reservoir to the water area of ​​the reservoir, thereby ultimately realizing the migration of fish.

[0018] Please refer to Figures 1 to 10 The fish passage system disclosed in this embodiment of the invention is located in the area where a reservoir is situated. In this embodiment, the reservoir can be formed by a dam of a hydroelectric power station located on a section of an "S"-shaped river bend within an asymmetrical U-shaped valley. The reservoir can also be formed by impounding water on other types of river channels; this embodiment does not limit the formation method of the reservoir. The disclosed fish passage system may include a fish collection device 100, a fish lifting device 200, and a fish propagation device 300.

[0019] The fish-collecting device 100 includes at least one fish-collecting channel 110 laid in the river channel downstream of the reservoir. The fish-collecting channel 110 has a trough-shaped structure and can be constructed by concrete casting or by metal structural components; this embodiment of the invention does not impose any limitations. The fish-collecting channel 110 extends along the extension direction of the river channel in a gradually decreasing manner, thereby achieving a smooth connection with the river channel downstream of the reservoir, which is beneficial for fish in the river channel downstream of the reservoir to enter the fish-collecting channel 110. For example, the slope of the fish-collecting channel 110 is 1:20. Specifically, the fish-collecting channel 110 can be a straight channel or a curved channel; this embodiment of the invention does not limit the specific shape of the fish-collecting channel 110. The first end of the fish-collecting channel 110 is close to the dam of the reservoir, for example, connecting to the tailrace channel of a power station in the dam, and the second end of the fish-collecting channel 110 extends away from the dam (e.g., straight extension, curved extension, etc.). The height of the first end of the fish-collecting channel 110 is greater than the height of the second end of the fish-collecting channel 110.

[0020] The first end of the fish collection channel 110 can be connected to the reservoir's spillway, allowing some of the water discharged from the reservoir to flow into the fish collection channel 110 and eventually into the river channel through the second end of the fish collection channel 110. This method creates a flowing environment that encourages fish to swim upstream, allowing them to enter the fish collection channel 110 from the river channel and then swim upstream along the fish collection channel 110.

[0021] In this embodiment of the invention, the fish collecting device 100 may include one fish collecting channel 110 or multiple fish collecting channels 110. To improve fish collecting efficiency, the fish collecting device 100 disclosed in this embodiment may include multiple fish collecting channels 110, such as two fish collecting channels 110. Figure 4 As shown. Multiple fish collection channels 110 extend along the downstream river channel of the reservoir, and the multiple fish collection channels 110 can be distributed in parallel or roughly parallel manner.

[0022] The fish lifting device 200 is used to perform fish lifting operations, that is, to transport fish from a lower fish collection channel 110 to a higher position, and then to the breeding device 300 located at a higher position and the water area of ​​the reservoir. In this embodiment of the invention, the fish lifting device 200 may include a main track 210, a secondary track 220, multiple fish collection boxes 230, and a cable car lifting device 240 erected between the main track 210 and the secondary track 220. The main track 210 and the secondary track 220 are distributed at intervals, thereby providing track guidance for the movement of the cable car lifting device 240. In this embodiment of the invention, the main track 210 and the secondary track 220 may be laid on the hillsides on both sides of a river channel (e.g., an "S"-shaped river channel), and the main track 210 and the secondary track 220 are used to guide the movement of the two ends of the cable car lifting device 240. The two ends of the cable car lifting device 240 can move synchronously or asynchronously along the main track 210 and the auxiliary track 220, or one end of the cable car lifting device 240 can move along the main track 210 or the auxiliary track 220 while the other end does not move. This can change the direction in which the cable car lifting device 240 transports the fish collection box 230, and also facilitate the cable car lifting device 240 to pick up and put down the fish collection box 230 at different locations.

[0023] The cable car lifting device 240 may include a main tower 241, a secondary tower 242, a cable 243, and a cable car 244. The main tower 241 is slidably mounted on the main track 210, allowing it to move along the main track 210. The secondary tower 242 is slidably mounted on the secondary track 220, allowing it to move along the secondary track 220. The two ends of the cable 243 can be connected to the main tower 241 and the secondary tower 242 respectively. During the movement of at least one of the main tower 241 and the secondary tower 242, the cable 243 will also move or tilt in the extension direction of the main track 210 and the secondary track 220, thereby achieving overall movement of the cable 243 or adjustment of its extension direction, thus changing the transport position and direction. Specifically, the main track 210 and the secondary track 220 may be parallel, or they may be substantially parallel.

[0024] The cable 243 can be a single-rope structure or a double-rope structure; the specific structure of the cable 243 is not limited in this embodiment of the invention. There can be one or more cable cars 244. Similarly, in this embodiment of the invention, there can be one or more main towers 241, secondary towers 242, and cables 243. In embodiments with multiple main towers 241, secondary towers 242, and cables 243, multiple main towers 241 are sequentially distributed along the extension direction of the main track 210, and multiple secondary towers 242 are sequentially distributed along the extension direction of the secondary track 220. The main towers 241, secondary towers 242, and cables 243 can be matched one-to-one to form multiple sets of cable lifting devices 240. When the fish-passing system disclosed in this embodiment of the invention includes multiple sets of cable lifting devices 240, the fish-passing system's fish-transporting capacity is further improved.

[0025] In this embodiment of the invention, the main tower 241 may be configured with a main tower drive mechanism, and the secondary tower 242 may be configured with a secondary tower drive mechanism. The main tower 241 can move along the main track 210 under the drive of the main tower drive mechanism, and the secondary tower 242 can move along the secondary track 220 under the drive of the secondary tower drive mechanism.

[0026] The cable car 244 is mounted on the cable 243 and can slide along the cable 243. Specifically, the cable car 244 may be equipped with a cable car driver, which can drive the cable car 244 to slide along the corresponding cable 243, thereby realizing the movement of the cable car 244 between the main tower 241 and the secondary tower 242. The mechanism and cooperating structure of the cable car driver driving the cable car 244 to slide along the cable 243 are existing technologies and will not be described in detail here for the sake of brevity. Each fish collection box 230 is equipped with a detachable grip 700 for the cable car to pick up and put down. The cable car 244 picks up and puts down the fish collection box 230 through the detachable grip 700. It should be noted that the detachable gripper 700 has the function of automatically picking up and placing objects. The detachable gripper 700 is an existing device, but it is used in this embodiment of the application for the cable car 244 to pick up and place the fish collection box 230. That is to say, in this embodiment of the invention, the cable car 244 uses the detachable gripper to pick up and place the fish collection box 230. Since the detachable gripper 700 is a known device, its structure and automatic picking and placing principle are not the inventive design points of this application, and for the sake of brevity, they will not be described in detail here. When the detachable gripper 700 is connected to the cable car 244, the cable car 244 drives the detachable gripper 700 to move along the cable 243, which in turn drives the fish collection box 230 to move along the cable 243.

[0027] To accommodate the height of the fish collection box 230, a lifting device can be installed at the bottom of the cable car 244. This lifting device can be connected to a detachable grip 700, and its engagement height with the detachable grip 700 can be adjusted. This allows for the retrieval and placement of the fish collection box 230 at different heights. The lifting device may include, for example, a drum, a drum drive motor, and a lifting rope. The drum is rotatably mounted at the bottom of the cable car 244. The drum drive motor is located at the bottom of the cable car 244 and connected to the drum drive motor to drive the drum to rotate. The lifting rope is wound around the drum and unwound as the drum rotates. The end of the lifting rope is used for retrieval and placement with the detachable grip. The height of the lifting rope's engagement with the detachable grip 700 is adjusted by unwound and rewound, thereby allowing for the retrieval and placement of the fish collection box 230 at different heights. It should be noted that various types of lifting devices can be used, and this embodiment of the invention does not limit the specific type and structure of the lifting device.

[0028] The number of cable cars 244 can be one or more, and this embodiment of the invention does not limit the number of cable cars 244 included in the cable car lifting device 240. A single cable car 244 can be mounted on the cable 243, or multiple cable cars 244 can be arranged at intervals. This embodiment of the invention also does not limit the specific number of cable cars 244 configured on the cable 243.

[0029] In this embodiment of the invention, a plurality of fish collection boxes 230 are arranged in the fish collection channel 110 along the extension direction of the fish collection channel 110. This structure enables the fish collection boxes 230 to perform multi-stage fish collection operations in the extension direction of the fish collection channel 110. As described above, the main tower 241 and the secondary tower 242 can slide along the main track 210 and the secondary track 220, respectively. Therefore, the movement of at least one of the main tower 241 and the secondary tower 242 can change the position and extension direction of the cable 243 connected to them, so that the cable car 244 on the cable 243 passes through the positions of the plurality of fish collection boxes 230 in the fish collection channel 110, thereby enabling the lifting or lowering of each fish collection box 230 in the fish collection channel 110. Of course, the cable car 244 on the cable 243 can also pass through the positions where the fish collection boxes 230 are located in the breeding device 300, thereby enabling the lifting or lowering of the fish collection boxes 230 in the breeding device 300. Of course, changes in the position and extension direction of the cable 243 can make the area covered by the change in the position of the cable car 244 larger, so that the cable car 244 can operate between the fish collection channel 110 and the breeding device 300 and between the breeding device 300 and the water area of ​​the reservoir, thereby meeting the requirements for fish transportation.

[0030] It should be noted that at least one of the main tower 241 and the secondary tower 242 may be equipped with a winch on which a cable 243 is wound. By winding and unwinding the winch, the length of the cable 243 can be adaptively adjusted, allowing the cable 243 to adapt to possible changes in distance between the main tower 241 and the secondary tower 242 during their movement. Of course, the variation in the length of the cable 243 also allows the cable car 244 to operate over a wider area, making it easier to operate between the fish collection channel 110 and the propagation device 300, and between the propagation device 300 and the reservoir, thereby meeting the requirements for fish transport.

[0031] In this embodiment of the invention, the propagation device 300 is used for fish propagation. The propagation device 300 is located on the hillside where the main track 210 is located. In this embodiment of the invention, the propagation device 300 is also equipped with a fish collection box 230. In other words, both the fish collection channel 110 and the propagation device 300 are equipped with fish collection boxes 230. The fish collection channel 110 is equipped with multiple fish collection boxes 230, and the propagation device 300 may be equipped with one or multiple fish collection boxes 230. The cable car lifting device 240 is used to lift the fish collection box 230 corresponding to the fish collection channel 110 for transfer between the fish collection channel 110 and the propagation device 300, and to transfer the fish collection box 230 corresponding to the propagation device 300 between the propagation device 300 and the water area of ​​the reservoir via the detachable grip.

[0032] The cable car lifting device 240, through the transfer of fish collection boxes 230 (i.e., fish collection boxes 230 placed in the fish collection channel 110) corresponding to the fish collection channel 110, transports fish-filled fish collection boxes 230 from the fish collection channel 110 to the breeding device 300 and releases the fish into the breeding device 300. Then, the empty fish collection boxes 230 are transported back to their corresponding placement positions in the fish collection channel 110, thus resetting these fish collection boxes 230. For ease of understanding, the fish collection box 230 placed in the fish collection channel 110 and collecting fish (i.e., wild fish in the river) in the fish collection channel 110 is referred to as the first fish collection box, which is also the fish collection box 230 corresponding to the fish collection channel 110 mentioned above. The first fish collection box is placed in the fish collection channel 110. The first fish collection box is lifted after being connected to the detachable grip and placed in the fish collection channel 110 after being separated from the detachable grip.

[0033] The cable car lifting device 240, by transporting the fish collection boxes 230 corresponding to the propagation device 300 (i.e., the fish collection boxes 230 placed in the propagation device 300), achieves the following: the fish collection boxes 230 containing fish (i.e., fish artificially bred at the propagation station) are transported from the propagation device 300 to the reservoir waters, and the propagated fish are released into the reservoir waters. Afterward, the empty fish collection boxes 230 are transported back to their corresponding placement positions within the propagation device 300, thus resetting these fish collection boxes 230. For ease of understanding, the fish placed in the propagation device 300 and collecting fish (i.e., fish artificially bred at the propagation station) in this text is referred to as the second fish collection box, which is also the fish collection box 230 corresponding to the propagation device 300 mentioned above. The second fish collection box is placed in the propagation device 300. The second fish collection box is lifted after being connected to the detachable grip and placed in the propagation device 300 after being separated from the detachable grip. It should be explained that the propagation station in this article is the propagation device 300.

[0034] As described above, after entering the fish collection channel 110, the fish will enter the fish collection box 230 in the fish collection channel 110. Then, they will be picked up by the detachable gripper on the cable car 244 and transported to the breeding device 300. After breeding in the breeding device 300, they will enter the fish collection box 230 of the breeding device 300, and then be picked up by the detachable gripper on the cable car 244. They will then be transported to the water area of ​​the reservoir, and finally the fish will be transferred.

[0035] In one embodiment, the artificially bred offspring fry are placed in the fish collection box 230 of the propagation device 300, then picked up by the detachment grappling hook on the cable car 244, and then transported to the waters of the reservoir suitable for the fry to complete their life cycle, thus achieving propagation and release.

[0036] It should be noted that, as mentioned above, the main tower 241 and the secondary tower 242 can slide along the main track 210 and the secondary track 220 respectively. Moreover, at least one of the main tower 241 and the secondary tower 242 can be equipped with a winch with a cable 243 wound around it to change the length of the cable 243. Therefore, the movement of at least one of the main tower 241 and the secondary tower 242 and the winch's winding and unwinding of the cable 243 enable the cable car 244 sliding on the cable 243 to traverse a relatively wide area, thereby satisfying the need for the fish collection box 230 to transport fish widely between the geographical area between the fish collection channel 110 and the breeding device 300 and between the breeding device 300 and the water area of ​​the reservoir. In one embodiment, the cable car lifting device 240 includes only one cable 243, or even just one cable 243 slidably sets up a cable car 244, which can also meet the needs of fish collection box 230 transferring fish between fish collection channel 110 and breeding device 300 and between fish collection device 300 and water area of ​​reservoir.

[0037] In other embodiments, the cable car lifting device 240 includes multiple cables 243, with multiple cable cars 244 slidably mounted on each cable 243. Each cable 243 is installed via a corresponding pair of main towers 241 and auxiliary towers 242. This facilitates the transfer of fish between the fish collection box 230 and the fish collection channel 110 and the breeding device 300, as well as between the fish collection box 230 and the water area of ​​the reservoir. It should be noted that in embodiments with multiple cables 243, the cables 243 can be arranged side-by-side to avoid potential mutual interference between the sliding cable cars 244 during operation. Of course, other layout methods are also possible, and this embodiment of the invention is not limited to any particular layout.

[0038] Under this premise, in a more specific embodiment, the cable car lifting device 240 may include two main towers 241, two auxiliary towers 242, and two cables 243. The two main towers 241, two auxiliary towers 242, and two cables 243 are distributed sequentially, thus forming two independent transport units. One of these two independent transport units can be used to transport fish from the fish collection channel 110 to the breeding device 300 by lifting the fish collection box 230, and to transport empty fish collection boxes 230 from the breeding device 300 to the fish collection channel 110. The other of these two independent transport units can be used to transport fish from the breeding device 300 to the water area of ​​the reservoir by lifting the fish collection box 230, and to transport empty fish collection boxes 230 from the water area of ​​the reservoir back to the breeding device 300. This structure enables two independent transport units to handle the transfer of the corresponding fish collection boxes 230 between the fish collection channel 110 and the breeding device 300, as well as between the breeding device 300 and the water area of ​​the reservoir. This avoids mutual interference, facilitates independent and efficient transport of the fish collection boxes 230, and ultimately improves the efficiency of fish transport.

[0039] The working process of the fish collection system disclosed in this embodiment of the invention is as follows: Fish in the downstream river channel of the reservoir swim upstream along the fish collection channel 110 and enter the fish collection box 230 placed in the fish collection channel 110. After a predetermined number of fish are collected in the fish collection box 230, it is lifted by a cable car 244 and transported to the propagation device 300. The fish collection box 230 releases the collected fish into the propagation device 300, where they serve as parent fish for propagation. After the fish collection box 230 is transported to the propagation device 300 and the fish are released, the empty fish collection box 230 is transported back to its placement position in the fish collection channel 110 for another fish collection operation. In addition, after the propagation operation is completed, the fish in the propagation device 300 will enter the fish collection box 230 in the propagation device 300, and will eventually be transported to the waters of the reservoir by the cable car 244, and the propagated fish will be released into the reservoir. This process of transporting fish from the river to the reservoir is completed. After the fish are released into the waters of the reservoir, the empty fish collection box 230 will be transported back to the propagation device 300 to prepare for the subsequent transport of propagated fish to the waters of the reservoir.

[0040] During this process, the main tower 241 and the secondary tower 242 can move along the main track 210 and the secondary track 220 respectively, and the cable car 244 can slide along the cable 243. Therefore, the cable car 244 can pick up and place fish collection boxes 230 in a large geographical area, and thus can transport multiple fish collection boxes 230 placed in the fish collection channel 110. Since multiple fish collection boxes 230 are arranged in the extension direction of the fish collection channel 110, after one fish collection box 230 is transported away, the fish in the fish collection channel 110 can continue to swim upstream along the fish collection channel 110 and be collected by the next fish collection box 230. In embodiments where there are at least three fish collection boxes 230, even if the next fish collection box 230 is transported away, the fish in the fish collection channel 110 can continue to swim upstream along the fish collection channel 110 and be collected by the next fish collection box 230 further away. Compared to traditional fish lifts that use a single-box model for fish collection and transport, this structure enables continuous fish collection. It reduces the risk of fish escaping due to obstacles like dams, preventing them from turning back. If a large number of fish are encountered, multiple collection boxes 230 deployed in the collection channel 110 can work together to distribute the collection. Because fish are collected in different boxes 230, it avoids congestion in one space, preventing fish from being injured by squeezing.

[0041] Meanwhile, the cable car lifting device 240 used in this structure includes a main tower 241, a secondary tower 242, a cable 243, and a cable car 244. During installation, the main track 210, secondary track 220, main tower 241, and secondary tower 242 can be easily arranged on the slopes on both sides of the river to achieve the suspended operation of the cable 243 and cable car 244. These devices are relatively dispersed, so the requirements for construction conditions such as terrain and geology are not high, and there are fewer restrictions on site selection. Since multiple fish collection boxes 230 are used to distribute the fish collection load, the fish collection boxes 230 do not need to be large in size, and it is not easy to form a large-sized and heavy structure, so there is no major lifting safety risk.

[0042] In this embodiment of the invention, some structures in the cable car lifting device 240 can be equipment left over from the construction period of the reservoir dam. In this embodiment of the invention, concrete placement cable machine equipment can be used, thereby reducing the construction investment of the fish passage system disclosed in this embodiment of the invention.

[0043] In this embodiment of the invention, the fish collection channel 110 has multiple fish collection boxes 230 arranged along its extension direction. The multiple fish collection boxes 230 work together, thereby reducing the fish collection load on each fish collection box 230. Therefore, each fish collection box 230 does not need to be large in size, resulting in significant optimization of its weight and wind resistance, thus reducing safety risks during lifting. Furthermore, the fish collection channel 110 extends along the river channel in a gradually decreasing manner, thus adapting to changes in river water level and enabling fish collection at different water levels, which is beneficial for improving the fish collection effect.

[0044] In this embodiment of the invention, the fish collection channel 110 may include a plurality of fish passage pools 101 arranged sequentially in its extending direction. An isolation part 103 for forming a fish passage opening 102 is provided at the junction of two adjacent fish passage pools 101. Two adjacent fish passage pools 101 are connected through the fish passage opening 102 between them. A plurality of fish collection boxes 230 located in the fish collection channel 110 are respectively arranged in a plurality of spaced fish passage pools 101. During the process of fish migrating upstream through the fish collection channel 110, they will enter a certain fish collection box 230. Fish that do not enter the fish collection box 230 will enter the next fish collection box 230 through the fish passage opening 102 where they are located. In the end, it can be ensured that fish are collected by fish collection boxes 230 during the migration process in the fish collection channel 110, avoiding the crowding and damage caused by fish swimming too concentratedly into a certain fish collection box 230. This type of fish-collecting channel 110 can form a pond, which is conducive to the fish resting during their upstream migration. It also helps to imitate the structure in natural river channels, which is beneficial to the survival of fish.

[0045] It should be noted that in this embodiment, the lateral dimension of the fish passage 102 is smaller than the lateral dimension of the fish passage 101. The lateral dimension refers to the width of the fish passage 102 or the fish passage 101 in the direction perpendicular to the extension of the fish collection channel 110, and the lateral dimension is also perpendicular to the depth of the fish passage 101. This structure increases the flow velocity of the water flowing in the fish collection channel 110 at the fish passage 102, which is beneficial to creating the characteristic of fish following the current during migration, ultimately facilitating the upstream migration of fish in the fish collection channel 110, and thus making fish collection operations easier.

[0046] In other embodiments, the fish collection channel 110 may not divide the fish pond 101 by the isolation section 103. However, in this case, the fish collection channel 110 does not have a place that is conducive to fish resting.

[0047] As mentioned above, the fish passage 102 is a structure connecting two adjacent fish passage pools 101. For efficient fish collection, in one embodiment, a fish collection box 230 can be located at the fish passage 102. During the upstream migration of fish, they will pass through the fish passage 102 to enter the next fish passage pool 101. Placing the fish collection box 230 at the fish passage 102 helps improve fish collection efficiency. It should be noted that placing the fish collection box 230 at the fish passage 102 does not block the passage; rather, it occupies a portion of the space. When some fish do not enter the fish collection box 230, they can continue their upstream migration through the space not occupied by the fish collection box 230, and these fish can be collected by subsequent fish collection boxes 230. Similarly, in other embodiments, the fish collection box 230 can also be located in the fish passage pool 101 instead of at the fish passage 102.

[0048] In other embodiments, when the fish collection box 230 is located at the fish passage 102, the fish passage 102 can also be blocked. The blocking here refers to preventing fish from migrating upstream through the fish passage 102, but it will not affect the flow of water in the fish collection channel 110. This allows fish to enter the fish collection box 230 more efficiently, and the fish collection box 230 can collect a preset amount of fish more quickly and be transported away. At the same time, the fish passage 102 where it is located is opened. After the fish collection box 230 is transported away, the fish in the fish collection channel 110 that did not enter the fish collection box 230 will continue to swim upstream through the opened fish passage 102 and then enter the next fish collection box 230.

[0049] In this embodiment of the invention, the fish collection box 230 can have various structures, and this embodiment is not limited thereto. In one embodiment, the fish collection box 230 may include a box body 231 and a first gate 232. The side wall of the box body 231 may have a box body inlet 2311, and the first gate 232 is slidably disposed on the box body 231 and can be opened and closed by sliding the box body inlet 2311. The bottom wall of the box body 231 may have a fish discharge port, and the fish discharge port is rotatably provided with a flap door to control its opening and closing. The fish collection box 230 may be provided with a flap door controller, which is connected to the flap door and used to control the flap door to rotate to open and close the fish discharge port. During the specific fish collection process, the first gate 232 can be opened, thereby opening the tank 231. Fish from the fish collection channel 110 or the breeding device 300 will enter the tank 231 through the tank inlet 2311. After the first gate 232 is closed, the fish collection tank 230 will be taken away by the cable car 244 and transported to the breeding device 300 or to the reservoir. Upon arrival at the breeding device 300 or the reservoir, the flap gate controller can open the flap gate, allowing the fish collected in the fish collection tank 230 to be released from the bottom of the fish collection tank 230, ultimately realizing the release of fish from the fish collection tank 230 into the breeding device 300 or the reservoir.

[0050] Specifically, the enclosure 231 may be equipped with a flap door drive mechanism, which is connected to a flap door drive. The flap door controller can control the start and stop of the flap door drive mechanism, which can drive the flap door to rotate, thereby opening or closing the fish discharge port.

[0051] In the fish collection box 230 disclosed in this embodiment of the invention, the area near the top of the side wall of the box body 231 can be a hollow area. When the first gate 232 is in the closed state, the side wall of the box body 231 and the first gate 232 can form a temporary storage space for fish located below the hollow area. In this embodiment of the invention, when the first gate 232 is in the open state, fish will enter the box body 231 through the box body inlet 2311. At the same time, water that can be discharged from the fish collection channel 110 will also enter the box body 231 through the box body inlet 2311. After the first gate 232 is closed, the water and fish that have entered the box body 231 are transported together. This method allows the fish to be transported while in water, which helps to reduce damage to the fish. Meanwhile, in this embodiment, by designing the area near the top of the box 231 as a hollow area, it is possible to prevent the box 231 from holding too much water. Excess water will flow out through the hollow area. This method allows the fish in the fish collection box 230 to be in the water during transportation, while also creating a space for jumping. This creates conditions that allow the fish to leap out of the water, minimizing the suppression of the fish's instincts (it should be noted that leaping out of the water is a stress response, and the fish uses "leaping out of the water" to resolve adverse effects), which helps to alleviate the damage to the fish during transportation.

[0052] In this embodiment of the invention, the fish collection box 230 can be placed in a relatively flat position in the fish collection channel 110 or the breeding device 300 to prevent it from tipping over during the fish collection process. To improve the stability of the fish collection box 230, the fish transfer system disclosed in this embodiment of the invention may also include multiple fixing frames 400. Multiple fish collection boxes 230 are correspondingly matched with multiple fixing frames 400. The multiple fixing frames 400 are distributed at corresponding positions in the fish collection channel 110 and the breeding device 300. The fixing frames 400 are used to position the fish collection box 230 to prevent it from tipping over during the fish collection process after the cable car 244 separates from the fish collection box 230. The fixing frame 400 has a positioning space in which the fish collection box 230 can be positioned. The structure of the fixing frame 400 can be varied, and this embodiment of the invention does not impose any limitations.

[0053] In one embodiment, the mounting bracket 400 may include a positioning chamber 410 and a second gate 420. The positioning chamber 410 may be fixed at a predetermined position in the fish passage 101 or the breeding device 300. The side wall of the positioning chamber 410 may have a positioning chamber inlet 411, and the second gate 420 may be slidably disposed in the positioning chamber 410 and open and close the positioning chamber inlet 411 by sliding. The top of the positioning chamber 410 may have a plug-in inlet / outlet. The fish collection box 230 may enter and exit the positioning chamber 410 through the plug-in inlet / outlet. When the fish collection box 230 is positioned in the positioning chamber 410, the positioning chamber inlet 411 and the box inlet 2311 face the same direction, that is, they both face the downstream of the fish collection channel 110 to facilitate the reception of upstream migrating fish.

[0054] Since the positioning chamber inlet 411 and the box inlet 2311 face the same direction, they can be considered to be positioned opposite each other. After the first gate 232 and the second gate 420 are opened, the fish in the fish collection channel 110 or the breeding device 300 will pass through the positioning chamber inlet 411 and the box inlet 2311 in sequence and enter the box 231, thus achieving fish collection. After the fish collection box 230 has collected a preset amount of fish, both the first gate 232 and the second gate 420 are closed, and then the fish collection box 230 can be lifted by the cable car 244. The closing of the second gate 420 can prevent the fish in the fish collection channel 110 or the breeding device 300 from entering the positioning chamber 410, which would prevent the positioning chamber 410 from being unable to accommodate the next placement of the fish collection box 230.

[0055] For ease of control, in one embodiment, the mounting bracket 400 may further include a gate controller, which can be mounted on the positioning chamber 410. The gate controller is used to connect to the first gate 232 and the second gate 420 respectively. The gate controller is used to control the synchronous opening and closing of the first gate 232 and the second gate 420. Specifically, the gate controller may include a gate drive mechanism. After the fish collection box 230 is placed in the positioning chamber 410, the gate drive mechanism can be connected to the first gate 232. For example, the gate drive mechanism can be connected to the first gate 232 via a magnetic attraction structure. In this case, the gate drive mechanism will drive the second gate 420, which is originally connected to it, to move together with the first gate 232, thereby achieving synchronous opening and closing. This structure is beneficial to improving the opening and closing efficiency of the gates.

[0056] In other embodiments, the fish collection box 230 can be equipped with a first sub-gate drive mechanism in its body 231, and the positioning chamber 410 can be equipped with a second sub-gate drive mechanism. The first sub-gate drive mechanism is connected to the first gate 232 to drive the first gate 232 to open and close the box inlet 2311 through movement. The second sub-gate drive mechanism is connected to the second gate 420 to drive the second gate 420 to open and close the positioning chamber inlet 411 through movement. This method enables the independent driving of the first gate 232 and the second gate 420, thereby avoiding mutual interference.

[0057] In this embodiment of the invention, the shapes of the positioning chamber 410 and the fish collection box 230 can be matched to achieve a better positioning effect. For example, the positioning chamber 410 can be a cylindrical structure, and the fish collection box 230 can also be a cylindrical structure. To facilitate the positioning and docking of the fish collection box 230 and the fixing frame 400, both the fish collection box 230 and the fixing frame 400 can be equipped with magnetic positioning devices. The magnetic positioning device on the fish collection box 230 cooperates with the magnetic positioning device on the fixing frame 400 to achieve alignment, thereby preparing for subsequent positioning and docking.

[0058] As described above, an isolation section 103 is provided between two adjacent fish passage pools 101 to form a fish passage opening 102. The isolation section 103 causes the fish passage opening 102, which is narrower than the width of the fish passage pool 101, to be formed at the junction of the two fish passage pools 101. This increases the water flow rate in the fish collection channel 110, thereby creating an environment conducive to fish swimming upstream. In this embodiment of the invention, the isolation section 103 can be a single flat plate. In other embodiments, the isolation section 103 can include an isolation plate 1031 and a circular column 1032. The isolation plate 1031 is fixed on one side of the junction of the two adjacent fish passage pools 101. The circular column 1032 is located on the other side of the junction of the two adjacent fish passage pools 101. The fish passage opening 102 is formed between the isolation plate 1031 and the circular column 1032. The edge of the isolation plate 1031 forming the fish passage opening 102 has a beveled surface to increase the opening of the inlet side of the fish passage opening 102. This structure not only facilitates the passage of fish through the fish passage 102, but also allows the fish to smoothly contact the surface of the circular column 1032 and the oblique cut surface of the partition plate 1031 during the passage, thereby avoiding damage to the fish. The oblique cut surface can form an acute angle with the extension direction of the fish collection channel 110, for example, 45°.

[0059] This invention does not limit the number of fish passage pools 101 included in the fish collection channel 110. For example, the fish collection channel 110 may include 24 fish passage pools 101, or it may include 30 fish passage pools 101. Each fish passage pool 101 may be rectangular or cubic in shape. This invention does not limit the specific shape of the fish passage pool 101. In one embodiment, the space formed by a single fish passage pool 101 may be 3.2m long, 2.5m wide, and 2m high. When the fish collection channel 110 is made of concrete, the wall thickness of the fish passage pool 101 may be 0.5m. The size of the fish passage pool 101 can be determined based on three times the body height of the fish combined with the safety freeboard. The length of the fish passage pool 101 can be determined based on 2.5 times the body length of the fish combined with the energy dissipation distance. This invention does not limit the specific size of the fish passage pool 101. Those skilled in the art can adaptively design the specifications of the fish passage pool 101 based on the average size of fish in the river (which can be determined through daily sampling).

[0060] To facilitate fish entering the fish collection channel 110 from the river and continuing to swim upstream along the fish collection channel 110, the fish passage system disclosed in this embodiment of the invention may also include multiple bubble curtain generators 500. Bubble curtain generators 500 may be installed in the area where the fish collection box 230 is set in the fish collection channel 110 or the breeding device 300. When working, the bubble curtain generators 500 can release bubble curtains into the water of the fish collection channel 110 or the breeding device 300. The bubble curtains can drive the fish to swim, which is conducive to the fish swimming upstream more efficiently.

[0061] Traditional aquaculture facilities rely heavily on manual capture of parent fish, resulting in low harvesting efficiency, difficulty in catching bottom-dwelling fish, and potential damage to the fish during the harvesting process. Some aquaculture facilities in hydropower projects primarily breed cold-water fish, and the water temperature of the associated circulating water systems is often insufficient to meet the reproductive requirements of these fish. Traditional aquaculture facilities also generate high levels of wastewater with limited treatment capacity, leading to significant water consumption. Furthermore, some hydropower projects' aquaculture facilities are located in areas meeting Class II water quality standards, meaning that treated wastewater from these facilities must not be discharged into rivers. Due to the large volume of wastewater, end-of-pipe treatment is costly.

[0062] Therefore, this invention discloses a breeding device 300, which includes a sorting pool 310, a parent fish pool 320, a breeding workshop 330, a release pool 340, a fish guide pipe 350, and a fish release valve 360.

[0063] The sorting pool 310 can be an outdoor open pool used to temporarily store fish when they are transported to the propagation device 300, allowing operators to sort suitable broodstock for propagation. The cable car lifting device 240 is used to transport the fish collection box 230 in the fish collection channel 110 to above the sorting pool 310 and release the fish into it. The sorting pool 310 is connected to the release pool 340 via a fish guide pipe 350. Fish unsuitable for broodstock in the sorting pool 310 are directly transported to the release pool 340 via the fish guide pipe 350. In other words, fish transported from the fish collection channel 110 to the propagation device 300 are temporarily stored in the sorting pool 310. Operators sort out the broodstock in the sorting pool 310, and fish unsuitable for propagation are directly transferred from the sorting pool 310 to the release pool 340 via the fish guide pipe 350. A fish release valve 360 ​​is installed on the fish guide pipe 350 and is used to control the opening and closing of the fish guide pipe 350. The fish release valve 360 ​​can be a gate valve or other types of valve. When the fish release valve 360 ​​is open, fish in the sorting tank 310 will enter the release tank 340 through the fish guide pipe 350. When the fish release valve 360 ​​is closed, fish in the sorting tank 310 cannot pass through the fish guide pipe 350 and therefore cannot enter the release tank 340. To facilitate the entry of fish into the release tank 340 through the fish guide pipe 350 when the fish release valve 360 ​​is open, a bubble curtain generator can also be installed in the sorting tank 310. The bubble curtain generator can generate a bubble curtain to drive the fish into the guide pipe 350, thereby facilitating the efficient transfer of fish from the sorting tank 310 to the release tank 340 through the fish guide pipe 350.

[0064] The broodstock pond 320 can be an outdoor open pond used to temporarily store broodstock selected from the sorting pond 310. The broodstock pond 320 can be connected to the breeding workshop 330, which in turn is connected to the release pond 340. The breeding workshop 330 can be an indoor workshop used for fish breeding. The broodstock in the broodstock pond 320 flow into the breeding workshop 330 for breeding. The broodstock in the breeding workshop 330, along with the newly bred fish, flow into the release pond 340. These fish, along with the fish that flow directly from the sorting pond 310 into the release pond 340, will eventually enter the fish collection box 230 in the release pond 340.

[0065] The release pond 340 is an outdoor open pond used for temporary storage of fish from the propagation device 300 before final release. The release pond 340 contains a fish collection box 230. A cable car lifting device 240 is used to transport (i.e., release) the fish from the release pond 340 to the reservoir via the fish collection box 230, and to release the fish from the fish collection box 230 into the reservoir. To facilitate the entry of fish from the release pond 340 into the fish collection box 230, a bubble curtain generator can also be installed in the release pond 340. The bubble curtain generator can generate a bubble curtain to drive the fish into the fish collection box 230 within the release pond 340, thereby improving fish collection efficiency.

[0066] In the specific operation, the fish collection box 230, lifted from the fish collection channel 110, is transported to the top of the sorting pool 310 for fish release. Once released into the sorting pool 310, fish in good condition are sorted and temporarily stored in the broodstock pool 320. The remaining fish in the sorting pool 310 are transported through the fish guide pipe 350 into the release pool 340, and then into the fish collection box 230 in the release pool 340 before being transported to the reservoir for release. The fish in the broodstock pool 320 are then transported by staff to the breeding workshop 330 for reproduction. The bred fish and fry in the breeding workshop 330 are then transferred to the release pool 340. After reproduction, the fish and fry are transferred to the fish collection box 230 in the release pool 340 and finally lifted by the cable car lifting device 240 into the reservoir for release. In this structure, only a small amount of manual sorting is required in the sorting pool 310. The sorting pool 310 is connected to the release pool 340 through the fish guide pipe 350, the broodstock pool 320 is connected to the breeding workshop 330, and the breeding workshop 330 is connected to the release pool. Therefore, the fish can be transported through the connecting structures between them without much manual intervention, thus reducing labor costs and fish damage caused by manual fishing.

[0067] In a further embodiment, the propagation device 300 disclosed in this invention may further include a clean water tank 370 and a wastewater tank 380. The clean water tank 370 is connected to the broodstock tank 320, the breeding workshop 330, the release tank 340, and the sorting tank 310 to transport clean water. The wastewater tank 380 is connected to the broodstock tank 320, the breeding workshop 330, the release tank 340, and the sorting tank 310 to receive wastewater. In this structure, the broodstock tank 320, the breeding workshop 330, the release tank 340, and the sorting tank 310 are connected in parallel between the clean water tank 370 and the wastewater tank 380, ultimately enabling the input of clean water and the discharge of wastewater between them, which is beneficial to the survival and temporary storage of fish in these tanks. Specifically, corresponding connecting pipelines and pumps can be configured on these pipelines to drive the input of purified water and the discharge of wastewater. This embodiment of the invention does not limit the specific connection methods between the wastewater tank 380 and the broodstock tank 320, the breeding workshop 330, the discharge tank 340, and the sorting tank 310, nor does it limit the specific connection methods between the purified water tank 370 and these other facilities. This structure enables the renewal of water within the broodstock tank 320, the breeding workshop 330, the discharge tank 340, and the sorting tank 310.

[0068] The amplification device 300 disclosed in this embodiment of the invention may further include a heat exchange structure 390, which may include a first heat exchange tank 391, a first heat exchange tube 392, a second heat exchange tank 393, and a second heat exchange tube 394. The first heat exchange tube 392 is disposed in the sewage tank 380 and communicates with the first heat exchange tank 391. The first heat exchange tube 392 drives the sewage in the sewage tank 380 to freeze and heat the heat exchange medium in the first heat exchange tank 391 by exchanging heat between the heat exchange medium in the first heat exchange tank 391 and the sewage in the sewage tank 380.

[0069] A tilting frame, a porous sieve plate, is installed inside the sewage tank 380 to tilt ice blocks in the sewage tank 380 into the clean water tank 370. The tilting frame can be connected to a tilting frame drive mechanism, which drives the tilting frame to tilt, allowing it to sink to the bottom of the sewage tank 380 and to tilt above the clean water tank 370. Specifically, when the tilting frame tilts to the bottom of the sewage tank 380, its supporting surface can face vertically upwards. When the tilting frame tilts to the top of the clean water tank 370, its supporting surface can face vertically downwards. A second heat exchange tube 394 is located in the first heat exchange tank 391 and communicates with the second heat exchange tank 393. The second heat exchange tube 394 drives the heat exchange medium in the first heat exchange tank 391 to cool down and the heat exchange medium in the second heat exchange tank 393 to heat up by transporting the heat exchange medium in the second heat exchange tank 393 to the heat exchange medium in the first heat exchange tank 391.

[0070] In this structure, both the first heat exchange tube 392 and the second heat exchange tube 394 are electro-refrigeration components. The inner walls of both heat exchange tubes are the heating side of the electro-refrigeration components, while the outer walls of both are the cooling side. In one embodiment, the first heat exchange tube 392 and the second heat exchange tube 394 can be sandwich structures, each including an inner metal layer, a semiconductor layer, and an outer metal layer, which can be copper layers. The semiconductor layer utilizes the Peltier effect to achieve cooling on one side and heating on the other. To improve heat exchange capacity, the first heat exchange tube 392 and the second heat exchange tube 394 can be serpentine tubes. The first heat exchange tube 392 and the second heat exchange tube 394 can be connected to heat exchange medium delivery pumps, enabling efficient delivery of the heat exchange medium.

[0071] In the specific working process, the first heat exchange tube 392, located in the sewage tank 380 and energized, can heat the heat exchange medium in the first heat exchange tank 391 and cool the sewage in the sewage tank 380. At the same time, the second heat exchange tube 394, located in the first heat exchange tank 391 and energized, can heat the heat exchange medium in the second heat exchange tank 393 and cool the heat exchange medium in the first heat exchange tank 391. Under these conditions, the first heat exchange tube 392 and the second heat exchange tube 394 can sequentially output heat from the sewage tank 380, eventually causing the sewage in the sewage tank 380 to begin to freeze, thereby increasing the temperature of the heat exchange medium in the first heat exchange tank 391 and simultaneously increasing the temperature of the heat exchange medium in the second heat exchange tank 393. For insoluble waste (such as fish excrement) in the sewage tank, which is heavier, it slowly sinks to the bottom of the tank, while the water in the sewage will freeze into ice and float. At the same time, for soluble waste in the sewage tank, due to the freezing and concentration effect, the waste will be excluded from the ice crystals during the freezing process, and the pure water will freeze into ice and float. This process is essentially sewage treatment. The water that freezes into ice is relatively clean because it is separated from the waste. When the ice reaches a preset volume, the tilting frame drive mechanism can be controlled to tilt the tilting frame to tilt and transport the ice to the top of the clean water tank 370, so that the ice falls into the clean water tank 370, thereby replenishing the clean water tank 370 with water.

[0072] The frozen ice melts in the purification tank 370, forming cooler purified water, which is then transported to the sorting tank 310, broodstock tank 320, breeding workshop 330, and release tank 340. This cooler water is suitable for the breeding of cold-water fish. As can be seen from the above process, this structure can extract purified water from wastewater, allowing for the reuse of most of the water (since wastewater is primarily water), thus reducing the daily water consumption of the breeding device 300. Furthermore, it eliminates the need for numerous cooling tanks as described in related technologies, reducing the footprint of the breeding device 300. Since purified water can be extracted from wastewater, it essentially achieves preliminary wastewater treatment, reducing the amount of wastewater generated. Even if wastewater needs to be discharged, only a small portion of the remaining wastewater after the purified water extraction is treated, reducing the complexity of the treatment process.

[0073] Therefore, a sewage pipe can be installed at the bottom of the sewage tank 380. Except for the frozen sewage, which can be periodically discharged into transport vehicles through the sewage pipe, a small amount of sewage can be transported away. This method avoids the problem of high end-of-pipe treatment costs due to large sewage volumes.

[0074] Furthermore, this method eliminates the need for costly treatment methods such as adsorption, membrane treatment, electroosmosis, and advanced oxidation, thus reducing wastewater treatment costs. It is important to emphasize that the fish passage system disclosed in this embodiment of the invention can simultaneously achieve fish passage, fish propagation, wastewater treatment of the propagation device 300, and the supply of low-temperature water, achieving a comprehensive and balanced effect.

[0075] The heat exchange medium in the first heat exchange pool 391 can be water or other fluids, as it is located close to the lower-temperature sewage pool 380. To ensure better flow of the heat exchange medium within the first heat exchange pool 391 along the first heat exchange tube 392 for heat exchange with the sewage in the sewage pool 380, in one embodiment, the heat exchange medium in the first heat exchange pool 391 is a mixture of water and ethanol, with a water-to-ethanol volume ratio of 7:3. This type of heat exchange medium is less prone to cooling, thus ensuring good fluidity during the heat exchange process. In this embodiment, the heat exchange medium in the first heat exchange pool 391 can be reused repeatedly. To avoid external interference, the first heat exchange pool 391 can be a closed pool.

[0076] Similarly, the heat exchange medium in the second heat exchange pool 393 can also be water or other fluids, such as the same heat exchange medium in the first heat exchange pool 391. However, since the second heat exchange pool 393 does not directly exchange heat with the wastewater in the lower-temperature wastewater pool 380, and the heat exchange medium in the second heat exchange pool 393 also exchanges heat with the heat exchange medium in the first heat exchange pool 391, the temperature of the heat exchange medium in the second heat exchange pool 393 is relatively high, making it less prone to solidification and thus possessing good fluidity.

[0077] In one embodiment, the heat exchange medium in the second heat exchange pool 393 can be water, and after heat exchange, the temperature of the heat exchange medium in the second heat exchange pool 393 is the highest. In this embodiment of the invention, when the heat exchange medium in the second heat exchange pool 393 is water, the water in the second heat exchange pool 393 can originate from the tailwater discharged from the hydropower station in the reservoir.

[0078] Based on this, the fish passage system disclosed in this embodiment of the invention may further include a water intake pipe 610, a water delivery pipe 620, and a reversible unit 630. The first end of the water intake pipe 610 extends into the river channel. The second end of the water intake pipe 610 is connected to the reversible unit 630, and the water intake pipe 610 connects the tailrace of the hydropower station in the reservoir to the reversible unit 630. The reversible unit 630 is located on the bank of the river channel; specifically, the reversible unit 630 may be located above the water level of the river channel. The first end of the water delivery pipe 620 is connected to the reversible unit 630, and the second end of the water delivery pipe 620 is connected to the second heat exchange pool 393. During water diversion, electricity from the plant's power system drives the reversible generator 630 to transport tailwater (part of the water discharged into the river) through the intake pipe 610 and the delivery pipe 620 to the second heat exchange pool 393. Conversely, during water replenishment, water in the second heat exchange pool 393, due to gravity, flows through the delivery pipe 620 to the replenishment pipe 640 and then to the fish collection channel 110, which in turn drives the reversible generator 630 to generate electricity. This method allows the reversible generator 630 to convert some electrical energy into gravitational potential energy in the second heat exchange pool 393, using or generating electricity as needed. This increases the stability of the plant's power system, thereby avoiding any impact on the hydropower station's generating units and ensuring stable power output from the hydropower station. Specifically, the delivery pipe 620 can extend along the riverbank slope to the second heat exchange pool 393.

[0079] As described above, during the specific operation, the heat exchange medium in the second heat exchange pool 393 will heat up; the heat exchange medium can be water. In this case, the fish passage system disclosed in this embodiment of the invention may also include a water supply pipe 640. The first end of the water supply pipe 640 is connected to the reversible unit 630, and the second end of the water supply pipe 640 is connected to the fish collection channel 110. When the second heat exchange pool 393 discharges water, the water (heat exchange medium) in the second heat exchange pool 393 will enter the reversible unit 630 through the water supply pipe 620 and drive the reversible unit 630 to do work and generate electricity by gravity, which is then connected to the plant power system. Conversely, the plant power system can be used to drive the reversible unit 630 to supply water to the second heat exchange pool 393 through the water inlet pipe 610. The water discharged from the second heat exchange pool 393 will enter the water supply pipe 640 after the reversible unit 630 does work and will eventually be discharged into the fish collection channel 110 through the water supply pipe 640. It should be explained that, in this article, the plant auxiliary power system refers to the power supply system in the reservoir area that is independent of the hydropower station's power generation system and is used to maintain the power supply for the hydropower station's own operation. In this case, the water discharged from the second heat exchange pool 393 will convert its gravitational potential energy into electrical energy through the reversible unit 630, thereby supplementing the power supply of the plant auxiliary power system and also helping to maintain the stability of the plant auxiliary power system's power supply.

[0080] It should be noted that when the water conveying structure formed by the water inlet pipe 610, the reversible unit 630, and the water delivery pipe 620 is in operation, the second heat exchange pool 393 will not release water. When the water discharge structure formed by the water delivery pipe 620, the reversible unit 630, and the makeup water pipe 640 is in operation, the water inlet pipe 610 will not draw water. In this embodiment of the invention, the reversible unit 630 may have a multi-channel structure. The reversible unit 630 can switch states to achieve the following: when the water inlet pipe 610 is connected to the water delivery pipe 620 through the reversible unit 630, the water delivery pipe 620 will not be connected to the makeup water pipe 640 through the reversible unit 630; conversely, when the reversible unit 630 switches states to achieve the following: when the water delivery pipe 620 is connected to the makeup water pipe 640 through the reversible unit 630, the water inlet pipe 610 will not be connected to the water delivery pipe 620 through the reversible unit 630. The reversible unit 630 is similar to a multi-channel valve, switching states through the movement of a valve core-like structure. It should be noted that the specific structure and working principle of the reversible unit 630 are well-known technologies, and for the sake of brevity, they will not be elaborated upon here.

[0081] As can be seen from the above working process, the water temperature in the second heat exchange pool 393 is relatively high after heat exchange. This water can be discharged into the fish collection channel 110, thereby increasing the temperature of the water flowing in the fish collection channel 110. Since fish exhibit thermotropism and flow-tropism during swimming, this water replenishment method is beneficial for fish to migrate upstream in the fish collection channel 110, ultimately facilitating fish collection. To provide a temperature regulation effect, the water replenishment pipe 640 can include multiple branch pipes, which can be connected to multiple corresponding fish passage pools 101, thereby providing multi-point water replenishment from multiple fish passage pools 101. Each branch pipe can be equipped with a flow control device, which allows the multiple branch pipes to create different flow environments at different locations in the fish collection channel 110 when providing multi-point water replenishment, thus adapting to different types of fish and fish of different lengths, ultimately facilitating the upstream migration of fish.

[0082] To improve heat exchange efficiency, in one embodiment, a stirring device can be provided in both the first heat exchange pool 391 and the second heat exchange pool 393. The stirring device achieves more efficient heat exchange by stirring the heat exchange medium in the first heat exchange pool 391 or the second heat exchange pool 393.

[0083] In a further embodiment, the fish passage system disclosed in this invention may further include a discharge pipe 650, which may be installed on the bank of a river. The first end of the discharge pipe 650 is connected to the reversible unit 630, and the second end is connected to the water supply pipe 640. That is, during the discharge of water from the second heat exchange pool 393, water from the reversible unit 630 first enters the discharge pipe 650, then flows from the discharge pipe 650 into the water supply pipe 640, and finally enters the fish collection channel 110 through the water supply pipe 640.

[0084] In one embodiment of the present invention, a drainage duct can be provided in the riverbank area where the discharge pipe 650 is located, for flood discharge. In one embodiment, one end of the discharge pipe 650 is connected to the reversible unit 630, and the other end of the discharge pipe 650 is connected to the drainage duct. The first section of the water supply pipe 640 is connected between the two ends of the discharge pipe 650. A control valve (e.g., a ball valve) can be provided at the connection between the water supply pipe 640 and the discharge pipe 650. The flow rate of the discharge pipe 650 into the drainage duct and the water supply pipe 640 is adjusted by the control valve to prevent the flow rate of the water supply pipe 640 from being too large and affecting the upstream migration of fish in the fish collection channel 110. Moreover, during periods of heavy rainfall, the water volume in the second heat exchange pool 393 surges. In this case, the discharge pipe 650 can also discharge floodwater through the drainage duct to prevent excessive water from being discharged into the fish collection channel 110.

[0085] In this embodiment of the invention, the water discharge pipe 650, water supply pipe 640, water intake pipe 610, and water delivery pipe 620 can all be made of stressed steel pipes. The water discharge pipe 650, water supply pipe 640, water intake pipe 610, water delivery pipe 620, and reversible unit 630 can be arranged on the riverbank and the hillside along the riverbank. In other embodiments, the water discharge pipe 650, water supply pipe 640, water intake pipe 610, water delivery pipe 620, and reversible unit 630 can also be laid underground within the hillside along the riverbank.

[0086] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A fish passage system, installed in the area of ​​a reservoir, characterized in that, The fish passage system includes a fish collection device (100), a fish lifting device (200), and a propagation device (300). The fish collection device (100) includes at least one fish collection channel (110) laid in the river channel downstream of the reservoir. The fish collection channel (110) extends along the river channel in a gradually decreasing manner. The fish lifting device (200) includes a main track (210), a secondary track (220), multiple fish collection boxes (230), and a cable car lifting device (240) erected between the main track (210) and the secondary track (220). The main track (210) and the secondary track (220) are respectively laid on the hillsides on both sides of the river channel. The cable car lifting device (240)... 0) Includes a main tower (241), a secondary tower (242), a cable (243), and a cable car (244); the main tower (241) is slidably mounted on the main track (210), the secondary tower (242) is slidably mounted on the secondary track (220), the two ends of the cable (243) are respectively connected to the corresponding main tower (241) and the secondary tower (242), the cable car (244) is mounted on the cable (243) and can slide along the cable (243); the fish collection channel (110) is provided with a plurality of fish collection boxes (230) distributed along the extension direction of the fish collection channel (110), and each fish collection box (230) is provided with a detachable grip for the cable car (244) to take off and put on; The breeding device (300) is located on the hillside where the main track (210) is situated. The breeding device (300) also contains the fish collection box (230). The cable car lifting device (240) is used to lift the fish collection box (230) corresponding to the fish collection channel (110) via the detachable grip, and to transfer it between the fish collection channel (110) and the breeding device (300), as well as to lift the fish collection box (230) from the breeding device (300) via the detachable grip. 0) The corresponding fish collection box (230) is used for transmission between the breeding device (300) and the water area of ​​the reservoir; the breeding device (300) also includes a water purification tank (370) and a sewage tank (380); the breeding device (300) also includes a heat exchange structure (390), the heat exchange structure (390) includes a first heat exchange tank (391), a first heat exchange tube (392), a second heat exchange tank (393), and a second heat exchange tube (394); the first heat exchange tube (391) 92) The first heat exchange tube (392) is located in the sewage tank (380) and connected to the first heat exchange tank (391). The first heat exchange tube (392) drives the sewage in the sewage tank (380) to freeze and heat the heat exchange medium in the first heat exchange tank (391) by transporting the heat exchange medium in the first heat exchange tank (391) to exchange heat with the sewage in the sewage tank (380). The sewage tank (380) is provided with a turning frame, which is used to turn the ice in the sewage tank (380) into the clean water tank (370). The second heat exchange tube (394) is located in the first heat exchange tank (391) and connected to the second heat exchange tank (393). The second heat exchange tube (394) drives the heat exchange medium in the first heat exchange tank (391) to cool down and the heat exchange medium in the second heat exchange tank (393) to heat up by transporting the heat exchange medium in the second heat exchange tank (393) to exchange heat with the heat exchange medium in the first heat exchange tank (391).

2. The fish passing system of claim 1, wherein The fish collection channel (110) includes a plurality of fish passage pools (101) arranged sequentially in its extending direction. An isolation part (103) for forming a fish passage opening (102) is provided at the junction of two adjacent fish passage pools (101). Two adjacent fish passage pools (101) are connected through the fish passage opening (102). A plurality of fish collection boxes (230) located in the fish collection channel (110) are respectively arranged in a plurality of spaced fish passage pools (101).

3. The fish passing system of claim 2, wherein, The fish collection box (230) includes a box body (231) and a first gate (232). The side wall of the box body (231) is provided with a box body inlet (2311). The first gate (232) is slidably disposed on the box body (231) and can be opened and closed by sliding. The bottom wall of the box body (231) is provided with a fish outlet. The fish outlet is rotatably provided with a flap door to control its opening and closing. The fish collection box (230) is provided with a flap door controller. The flap door controller is connected to the flap door and is used to control the flap door to rotate to open and close the fish outlet. The area near the top of the side wall of the box body (231) is a hollow area. When the first gate (232) is in the closed state, the side wall of the box body (231) and the first gate (232) form a temporary storage space for fish located below the hollow area.

4. The fish passing system of claim 3, wherein, The fish passage system also includes multiple fixed frames (400), with multiple fish collection boxes (230) corresponding to and cooperating with multiple fixed frames (400). Each fixed frame (400) includes a positioning chamber (410) and a second gate (420). The positioning chamber (410) is fixed in the fish passage pool (101) or the breeding device (300), and the side wall of the positioning chamber (410) is provided with a positioning chamber inlet (411). The second gate (420) is slidably disposed in the positioning chamber (410) and opens and closes the positioning chamber inlet (411) by sliding. The top of the positioning chamber (410) is provided with a plug-in connector. The fish collection box (230) can enter and exit the positioning chamber (410) through the plug-in inlet and outlet. When the fish collection box (230) is positioned in the positioning chamber (410), the orientation of the positioning chamber inlet (411) and the box body inlet (2311) are the same. The fixing frame (400) also includes a gate controller. The gate controller is located on the positioning chamber (410). The gate controller is connected to the first gate (232) and the second gate (420) respectively. The gate controller is used to control the first gate (232) and the second gate (420) to open and close synchronously.

5. The fish passing system of claim 2, wherein, The isolation section (103) includes an isolation plate (1031) and a circular column (1032). The isolation plate (1031) is fixed on one side of the connection between two adjacent fish passage pools (101), and the circular column (1032) is located on the other side of the connection between two adjacent fish passage pools (101). The fish passage opening (102) is formed between the isolation plate (1031) and the circular column (1032). The edge of the isolation plate (1031) forming the fish passage opening (102) has a beveled surface to expand the opening of the fish passage opening (102). The fish passage system also includes multiple bubble curtain generators (500). The bubble curtain generators (500) are provided in the area where the fish collection box (230) is located in the fish collection channel (110) or the breeding device (300).

6. The fish passing system of claim 1, wherein, The breeding device (300) includes a sorting pool (310), a parent fish pool (320), a breeding workshop (330), a release pool (340), a fish guide pipe (350), and a fish release valve (360). The sorting pool (310) is connected to the release pool (340) through the fish guide pipe (350). The fish release valve (360) is located on the fish guide pipe (350) and is used to control the opening and closing of the fish guide pipe (350). The parent fish pool (320) is connected to the breeding workshop (330), and the breeding workshop (330) is connected to the release pool (340). The release pool (340) is equipped with a fish collection box (230). The cable car lifting device (240) is used to transport the fish in the release pool (340) to the reservoir through the fish collection box (230).

7. The fish passing system of claim 6, wherein, The water purification tank (370) is connected to the parent fish tank (320), the breeding workshop (330), the discharge tank (340) and the sorting tank (310) respectively to transport purified water, and the sewage tank (380) is connected to the parent fish tank (320), the breeding workshop (330), the discharge tank (340) and the sorting tank (310) respectively to receive sewage.

8. The fish passing system of claim 1, wherein, The fish passage system also includes a water intake pipe (610), a water delivery pipe (620), and a reversible unit (630). The first end of the water intake pipe (610) extends into the river channel, and the second end of the water intake pipe (610) is connected to the reversible unit (630). The first end of the water delivery pipe (620) is connected to the reversible unit (630), and the second end of the water delivery pipe (620) is connected to the second heat exchange pool (393). When water is delivered to the second heat exchange pool (393), the power from the plant power system drives the reversible unit (630) to transport part of the water in the river channel into the water intake pipe (610) and then through the water delivery pipe (620) to the second heat exchange pool (393).

9. The fish passing system of claim 8, wherein, The fish passage system also includes a water supply pipe (640), the first end of which is connected to the reversible unit (630), and the second end of which is connected to the fish collection channel (110). When the second heat exchange pool (393) discharges water, the water discharged from the second heat exchange pool (393) is released into the fish collection channel (110) through the water supply pipe (620), the reversible unit (630) and the water supply pipe (640) in sequence, and drives the reversible unit (630) to generate electricity to connect to the plant power system. The fish passage system also includes a water discharge pipe (650), the first end of which is connected to the reversible unit (630), and the second end of which is connected to the river.

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