Fish collecting device

Abstract

The application discloses a fish collecting device, which comprises an outer box, an inner box assembly and an electric appliance assembly. The outer box is arranged across the tail water outlet. The inner box assembly comprises an inner box which is detachably assembled in the outer box and can be separated from the outer box under the lifting operation of a lifting device. The inner box is used for collecting fish. The electric appliance assembly is arranged on the outer box. The application has the characteristics of high fish collecting efficiency and convenient fish transferring operation.

Description

Technical Field

[0001] This application relates to the field of water conservancy engineering technology, and in particular to a fish collection device. Background Technology

[0002] While water conservancy and hydropower projects provide benefits such as flood control, power generation, and navigation, they also have a significant impact on the ecological environment. They inevitably affect the natural connectivity of river basins, especially by blocking fish migration routes and gene exchange. In other words, fish confined to the downstream cannot migrate naturally to the upstream, which to some extent affects the fish's living environment and biodiversity.

[0003] In related technologies, fish passage facilities serve as a fish protection measure to alleviate the obstruction effect of dams, playing a role in restoring fish migration channels and facilitating gene exchange between upstream and downstream fish populations. The main types of fish passage facilities include fishways, fish lifts, lifting gates, and fish collection systems. Among them, fish collection systems are widely used due to their flexible layout, ease of dam passage, saving fish energy, and reducing investment. However, current fish collection devices have relatively simple functions and low fish collection efficiency. Summary of the Invention

[0004] This application provides a fish-collecting device, which aims to solve the problems of the current fish-collecting devices having relatively simple functions and low fish-collecting efficiency.

[0005] To address the aforementioned technical problems, this application provides a fish-collecting device, comprising an outer casing, an inner casing assembly, and an electrical component; the outer casing is positioned across the tailwater outlet; the inner casing assembly includes an inner casing, which is detachably assembled to the outer casing so that it can be separated from the outer casing during lifting operations of a hoisting device, wherein the inner casing is used to collect fish; and the electrical component is mounted on the outer casing.

[0006] In some embodiments of this application, the electrical component includes a connected cable and the electrical component, the cable being disposed outside the outer casing.

[0007] In some embodiments of this application, the electrical component includes at least one of a monitoring component and a fish-attracting component.

[0008] In some embodiments of this application, a fish collecting cavity is formed inside the inner box, and a fish inlet communicating with the fish collecting cavity is provided;

[0009] The fish collecting device also includes a door assembly disposed in the inner box. The door assembly is configured to open the fish inlet when the inner box is placed into the outer box, driven by the outer box, and to close the fish inlet when the inner box is removed from the outer box.

[0010] In some embodiments of this application, the fish-collecting device further includes: A fish guide is provided on the outer box and has a fish guide channel communicating with the fish inlet. The fish guide is used to guide fish into the fish collection chamber through the fish guide channel.

[0011] In some embodiments of this application, a fish-collecting cavity is formed inside the inner box, and a valve port is provided at the bottom of the inner box; The fish collection device also includes a valve assembly located in the inner box, which is used to open or close the valve port.

[0012] In some embodiments of this application, a fish-collecting cavity is formed inside the inner box, and the fish-collecting cavity includes a fish-collecting tank located at the bottom of the inner box and capable of holding liquid.

[0013] In some embodiments of this application, the fish collection chamber further includes a net enclosure that communicates with the fish collection bin and is located above the inner box.

[0014] In some embodiments of this application, the outer casing has a first suspension portion, and the inner casing has a second suspension portion; The first suspension unit is configured to lift the inner box together with the lifting device, while the second suspension unit is configured to lift the inner box separately to separate it from the outer box under the action of the lifting device.

[0015] The beneficial effects of this application are as follows: Compared with the previous method of lifting and transporting fish using a single fish-collecting cage, this application uses an outer box and an inner box to collect fish in a coordinated manner. The outer box is positioned across the tailwater outlet, and the inner box is detachably assembled inside the outer box. In this way, the outer box can block the tailwater flow for the inner box in the direction of the tailwater flow, reducing the impact of the tailwater flow on the inner box to a certain extent. This allows the inner box to be placed stably at the tailwater outlet, thereby improving the stability and efficiency of fish collection in the inner box. Moreover, the electrical components are located on the outer box, so they are not affected by the lifting or lowering of the inner box, ensuring that the electrical components work underwater. Thus, this fish-collecting device has multi-functional fish collection capabilities, can intelligently monitor fish schools, thereby improving fish collection efficiency, enhancing the systematic management of fish school transportation, and thus improving the ecological environment of fish in the upstream and downstream areas. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the fish collection device provided in one embodiment of the present application, placed at the tailwater outlet. Figure 2 This is a schematic diagram of the structure of a fish-collecting device provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the outer casing provided in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of the inner box provided in one embodiment of this application; Figure 5 This is a side view of a fish-collecting device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an inner box assembly provided in one embodiment of this application; Figure 7 This is a side view of the inner box assembly provided in one embodiment of this application; Figure 8 This is a top view of the inner box assembly provided in one embodiment of this application.

[0018] Figure label: 100. Fish collecting device; 10. Outer box; 11. Outer frame; 111. Side frame; 112. Outer connecting frame; 113. Accommodation space; 114. Limiting protrusion; 115. Accommodation groove; 12. Support frame; 13. First suspension part; 14. First water passage; 20. Inner box assembly; 21. Inner box; 211. Fish collecting cavity; 211a. Fish collecting bin; 211b. Enclosure bin; 212. Fish inlet; 213. Second water passage; 214. Inner frame; 2141. Inner frame body; 2142. Inner connecting frame; 215. Box shell ; 2151, base plate; 2151a, valve port; 2152, side plate; 216, second suspension part; 22, door assembly; 221, compartment door assembly; 2211, escape-proof door; 222, valve assembly; 2221, valve seat; 2221a, perforation; 2222, valve stem; 2223, plug; 30, monitoring component; 40, fish-attracting component; 50, fish-guiding component; 51, fish-guiding net; 52, contact part; 53, fish-guiding channel; 60, protective shell; 61, cable trough; 200, tailwater outlet; 201, door groove; 70, cable. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0020] While water conservancy and hydropower projects provide benefits such as flood control, power generation, and navigation, they inevitably affect the natural connectivity of river basins, especially by blocking fish migration routes and gene exchange. In other words, fish confined to the downstream cannot migrate naturally to the upstream, which to some extent affects the fish's living environment and biodiversity.

[0021] To improve and regulate the ecological environment of fish in upstream and downstream areas, fish passage facilities are a fish protection measure to mitigate the obstruction effect of dams. Fish passage facilities play a role in restoring fish migration channels and facilitating gene exchange between upstream and downstream fish groups. Specifically, the main types of fish passage facilities include fish channels, fish lifts, lifting gates, and fish collection systems. Among them, fish collection systems are widely used due to their flexible layout, ease of dam passage, saving fish energy, and saving investment. However, current fish collection devices have relatively simple functions and low fish collection efficiency.

[0022] Based on this, this application provides a fish-collecting device 100, please refer to... Figures 1 to 6 The fish collection device 100 is used to collect fish at the tailwater outlet 200. As a temporary storage and transfer carrier for fish, the fish collection device 100 has suitable environmental conditions such as water flow and dissolved oxygen, which prevents fish from being damaged by sudden environmental changes after collection. At the same time, it facilitates staff to count, classify and check the health of fish, and ultimately realize the propagation and release or scientific research.

[0023] The fish collection device 100 includes an outer casing 10, an inner casing assembly 20, and electrical components. The outer casing 10 is horizontally mounted across the tailrace outlet 200. Both ends of the outer casing 10 are installed on opposite side walls of the tailrace outlet 200 along the horizontal direction, ensuring stable placement at the tailrace outlet 200 under the impact of the tailrace flow. Understandably, the tailrace outlet 200 refers to the outlet of the hydropower station's generating unit. During hydropower generation, water is introduced into the generating unit from the upstream dam, and after the turbine rotates to generate kinetic energy, it drives the generator to produce electricity. Simultaneously, excess water is discharged downstream through the tailrace outlet 200 to maintain the balance of the reservoir's water level.

[0024] In some embodiments, the outer casing 10 includes an outer frame 11 and a support frame 12. The outer frame 11 has a receiving space 113 for accommodating the inner casing assembly 20, thereby enabling the inner casing assembly 20 to be detachably assembled into the outer casing 10. The outer frame 11 also has a limiting protrusion 114 that limits and cooperates with the door groove 201 of the tailwater outlet 200. This enhances the outer casing 10's resistance to the impact of the tailwater flow, thereby improving the stability of the outer frame 11 placed at the tailwater outlet 200 and preventing damage to the outer casing 10 and failure of fish collection. Understandably, the two opposite side walls of the tailwater outlet 200 are recessed to form grooves, both of which extend in the vertical direction. Each groove constitutes the door groove 201 of the tailwater outlet 200. The limiting protrusion 114 of the outer frame 11 is located in the groove and limits and cooperates with the groove.

[0025] Specifically, the outer frame 11 includes two side frames 111 and an outer connecting frame 112. The two side frames 111 are spaced apart along the transverse direction. The two ends of the outer connecting frame 112 are fixedly connected to the two side frames 111 respectively, such as by welding, screwing, or other methods. Of course, the outer connecting frame 112 and the two side plates can also be an integral component. The inner sidewall of the side frame 111 is recessed to the outside to form a receiving groove 115, and a limiting protrusion 114 is formed on the outside. The middle part of the inner connecting frame 2142 and the receiving groove 115 constitute a receiving space 113.

[0026] The support frame 12 is connected to the outer frame 11. For example, the support frame 12 is welded to the inner connecting frame 2142. The support frame 12 is located within the accommodating space 113 and is used to support and limit the inner tank assembly 20. Understandably, if the inner tank assembly 20 is placed inside the outer tank 10 and directly abuts against the bottom of the tailrace outlet 200 (in other words, the bottom of the tailrace outlet 200 supports the inner tank 21), sediments such as silt, mud, stones, or gravel tend to accumulate at the tailrace outlet 200. This can cause the inner tank assembly 20 to be placed unevenly, leading to tilting under the impact of the tailrace flow, potentially causing it to get stuck inside the outer tank 10, which is detrimental to subsequent lifting operations. Therefore, the support frame 12 supports the inner tank assembly 20, providing structural support and limiting the inner tank assembly 20, ensuring its placement stability and reducing the likelihood of jamming during lifting.

[0027] The inner box assembly 20 includes an inner box 21, which is detachably assembled within the outer box 10 so that it can be separated from the outer box 10 during lifting operations of a hoisting device. The inner box 21 is used to collect fish. The inner box 21 has a fish collecting chamber 211 and at least one fish inlet 212 communicating with the fish collecting chamber 211 and allowing fish to pass through. After fish enter the fish collecting chamber 211 through the fish inlet 212, they are less likely to escape from the fish inlet 212, thereby confining the fish school within the fish collecting chamber 211 and achieving fish collection. The inner box assembly 20 also includes a door assembly 22, which is disposed within the inner box 21 and can be used to close or open the fish inlet 212. When the fish inlet 212 is opened, the fish in the fish collecting chamber 211 can be discharged for fish school transfer. Understandably, when the inner box 21 is lifted from the outer box 10, the door assembly 22 is in a closed state to gather the fish in the fish collection chamber 211. After the inner box 21 is hoisted to the destination, the door assembly 22 is opened manually to release the fish. Alternatively, the fish can be released with the help of an auxiliary structure.

[0028] The electrical components are mounted on the outer casing 10, thus unaffected by the raising or lowering of the inner casing, ensuring underwater operation. In some embodiments, the electrical components include a connected cable 70 and the electrical components themselves, with the cable 70 arranged outside the outer casing 10 and the electrical components mounted on the outer casing 10. Furthermore, the outer casing 10 is also provided with a cable channel 61 for protecting the cable 70, thus preventing wear and tear on the cable 70, extending its service life, and improving the safety and reliability of the fish-attracting device.

[0029] Specifically, a protective shell 60 is provided on the outer wall of the side frame 111, through which the cable 70 passes to protect it. The protective shell 60 has cable grooves 61, the number of which can be set according to the number of cables 70. Each cable 70 is passed through one groove, and the grooves extend vertically. Each portion of the cable 70 passes through the groove, and the protective shell 60 protects the portion of the cable 70 submerged in water. This prevents friction between the groove wall of the door groove 201 and the cable 70 when the outer casing 10 is lifted or placed, preventing cable wear and electrical leakage and ensuring the safety of fish collection while avoiding harm to the fish.

[0030] During the process of lifting or placing the outer casing 10, the length of the cable 70 needs to be adjusted in real time to avoid breaking the cable 70, or to avoid the cable 70 being too long, tangled, or twisted. Therefore, the fish collection device 100 also includes a winding assembly. The winding assembly is used to wind up the cable 70 when the lifting device lifts the outer casing 10, and to unwind the cable 70 when the lifting device lowers the outer casing 10.

[0031] Optionally, the winding assembly includes a mounting frame, winding wheels, and guide pulleys. The mounting frame can be installed on the dam and provides a mounting base for the guide pulleys and winding wheels. The winding wheels are rotatably mounted on the mounting frame. The number of winding wheels and cables 70 is the same, and each winding wheel holds one cable 70. When the outer box 10 is installed or lifted in the door slot 201, the cable 70 can be wound and unwound synchronously with the lifting and lowering of the outer box 10, ensuring that the cable 70 maintains a certain tension and does not become tangled or subjected to excessive force. Among its features are: real-time dynamic tensioning of the winding reel: automatically adjusting the tension according to the cable 70 winding and unwinding speed to prevent the cable 70 from becoming slack or overstretched, ensuring a smooth and orderly winding and unwinding process; constant tension control: equipped with a precise tension adjustment system that maintains constant tension throughout the winding and unwinding process, effectively protecting the cable 70 insulation layer and internal structure, and extending its service life; overload protection: automatically triggering a shutdown or unloading mechanism when the tension exceeds the preset safety value to prevent cable 70 breakage and equipment damage, improving operational safety; and compatibility with multiple cable 70 specifications: supporting the use of cables 70 of different diameters and materials, and meeting the needs of diverse operating scenarios by quickly adjusting tension parameters, eliminating the need for frequent parts replacement.

[0032] Guide pulleys are mounted on the mounting bracket. Their function is to guide the electrical equipment cables 70 during the installation or lifting of the outer casing 10 into the door slot 201, ensuring the cables 70 are arranged orderly along a predetermined position or trajectory. The guide pulleys also guide the cables 70 within the door slot 201. Understandably, the winding wheel is equipped with an adapter, so that during the lifting or lowering of the outer casing 10, only the cable 70 located at the lower end of the winding wheel is wound up; the upper cable 70 connects to the control cabinet of the automatic door operator, enabling overall system control.

[0033] Furthermore, the electrical component includes at least one of a monitoring component 30 and a fish-attracting component 40. For example, the electrical component may only include the monitoring component 30; or, the electrical component may only include the fish-attracting component 40; or, the electrical component may include both the monitoring component 30 and the fish-attracting component 40. It is worth noting that in this embodiment, the electrical component includes both the monitoring component 30 and the fish-attracting component 40, and the cable 70 can stably supply power to both the monitoring component 30 and the fish-attracting component 40. The fish-attracting component 40 is located in the outer casing 10 and is used to attract fish into the fish collection chamber 211 to improve the efficiency of fish collection. The monitoring component 30 is located in the outer casing 10 and is used to monitor the fish status in the fish collection chamber 211 and / or areas other than the fish collection chamber 211. For example, under the monitoring of the monitoring component 30, the fish situation in the fish collection chamber 211 can be known. If a certain number of fish are found, the inner casing 21 can be lifted for transportation. This avoids lifting the inner casing 21 when the number of fish is small, thus saving power costs.

[0034] In some embodiments, the monitoring component 30 includes at least one of a visual sensor, an optical sensor, and an acoustic sensor. The monitoring component 30 monitors the dynamics of the fish school and provides data support for subsequent analysis. The visual sensor can be an underwater camera, which can intuitively obtain information such as the species, number, and size of the fish in the fish collection chamber 211. The optical sensor can be a photoelectric sensor, an infrared light curtain, or other similar components. The acoustic sensor can be a multibeam sonar, a split-beam sonar, a fish finder, or other similar components.

[0035] And / or, the fish-attracting component 40 includes at least one of an optical guide and an acoustic guide. The optical guide can be a metal halide lamp or an underwater LED fish-attracting lamp. The underwater LED fish-attracting lamp can be precisely programmed to control the light color (wavelength, such as blue light, green light), light intensity, and flashing frequency to target the visual sensitivities of different fish species. The acoustic guide can be an underwater speaker with programmable sound wave behavior to simulate the sound of fish fighting for food to attract fish, or play a grouping signal of a specific fish species to create the illusion of "safety" or "food availability," or play a soothing sound, a calming low-frequency tone to reduce the stress response of fish. This can attract fish schools remotely or mask mechanical noise that makes fish uneasy in noisy underwater environments, thereby facilitating the guidance of fish schools.

[0036] Since both the monitoring component 30 and the fish-attracting component 40 require electricity to operate, and both are located underwater, cables need to be laid from the dam into the water. Both the monitoring component 30 and the fish-attracting component 40 are electrically connected to an external control system (such as a computer management and control platform) via cables to power them and transmit the fish information collected by the monitoring component 30 and the fish-attracting component 40 back to the external control system for appropriate operation.

[0037] Based on the above scheme, compared to the previous method of using a single fish-collecting cage to lift and transport fish, this scheme uses an outer box 10 and an inner box 21 working together to collect fish. The outer box 10 is positioned across the tailwater outlet 200, and the inner box 21 is detachably assembled inside the outer box 10. In this way, the outer box 10 can block the tailwater flow for the inner box 21 in the direction of the tailwater flow, reducing the impact of the tailwater flow on the inner box 21 to a certain extent. This allows the inner box 21 to be stably placed at the tailwater outlet 200, thereby improving the stability of fish collection. Furthermore, the fish-attracting component 40 lures the fish into the fish-collecting chamber 211, thereby improving the efficiency of fish collection. The monitoring component 30 also monitors the fish inside the fish-collecting chamber 211. The system monitors the fish population and species, allowing for easy lifting of the inner tank 21 when the fish population reaches a certain level. This avoids wasting power by lifting the inner tank 21 when there are too few fish, facilitating subsequent fish transfer. Furthermore, the door assembly 22 ensures that the fish in the fish collection chamber 211 can be temporarily kept in the water while the inner tank 21 is being lifted, reducing the risk of fish damage. It also facilitates opening the fish collection chamber 211 after the inner tank 21 has been lifted to its destination. Thus, the fish collection device 100 is a multi-functional fish collection device that can intelligently monitor the fish population, thereby improving fish collection efficiency, enhancing the systematic management of fish transfer, and ultimately improving the upstream and downstream fish ecological environment.

[0038] Furthermore, the way the outer box 10 and inner box 21 work together allows for the lifting of only the inner box 21 during fish transfer, while the outer box 10 remains at the tailwater outlet 200. This makes lifting the weight lighter and more flexible compared to lifting the entire fish collection device 100, making the fish transfer process more convenient and improving the ease of operation. Understandably, the outer box 10 can also be lifted separately using the lifting device. For example, during flood discharge when the floodwater flow is large, the outer box 10 can be lifted to avoid damage to the fish collection device 100. This provides high flexibility and ease of installation.

[0039] Furthermore, to ensure that fish can easily enter but not easily escape, a funnel-shaped channel is formed at the fish inlet 212. For example, the fish inlet 212 can be set as a funnel-shaped fish inlet 212, or a trumpet-shaped fish inlet tube can be installed at the fish inlet 212. The inlet of the fish inlet tube is set to be larger than the outlet, and a flexible sleeve, such as a plastic sleeve or silicone sleeve, is set at the outlet to prevent escape and is transparent. After the fish pass through the flexible sleeve, they enter the fish collecting chamber 211. The flexible sleeve swings or closes the outlet under the action of the tail water flow, thus ensuring that the fish can swim into the fish collecting chamber 211 but are not easy to escape from the fish collecting chamber 211.

[0040] Please continue to refer to Figures 1 to 8To better attract fish, the tendency of fish to follow water flow can be utilized. In some embodiments, the outer box 10 has a first water passage 14 for the tailwater to flow through. Specifically, the first water passage 14 is defined by the two side frames 111. The inner box 21 has a second water passage 213 that communicates with the first water passage 14. The tailwater is allowed to flow naturally through the first water passage 14 and the second water passage 213, while reducing water resistance and the impact of the water flow on the outer box 10 and the inner box 21. Moreover, the first water passage 14 and the second water passage 213 make it easy to form a water flow at the tailwater outlet 200. By utilizing the tendency of fish to follow water flow, the fish migrate and concentrate at the tailwater outlet 200, which greatly increases the probability of attracting fish.

[0041] The first water passage 14 and the second water passage 213 are located in the middle of the outer box 10 along the transverse direction. With this arrangement, the tailwater flow is formed in the middle of the outer box 10, which can attract fish on both sides of the tailwater flow, widening the fish-attracting area and more effectively increasing the probability of fish attraction.

[0042] Please continue to refer to Figures 1 to 6 In some embodiments, the fish collection chamber 211 includes a fish collection container 211a located at the bottom of the inner box 21 and capable of holding liquid. Understandably, the fish collection container 211a can temporarily store fish and water, and since the fish collection container 211a is located at the bottom, water loss during lifting can be avoided, ensuring that fish can be temporarily stored and reducing damage to the fish. The inner box 21 includes an inner frame 214 and a box shell 215 disposed on the inner frame 214. The box shell 215 encloses and forms the fish collection container 211a. The box shell 215 is provided with a fish inlet 212 communicating with the fish collection container 211a. The fish inlet 212 is located on the downstream side of the inner box 21 along the direction of the tailwater flow, which facilitates the fish swimming into the fish collection chamber 211 when migrating.

[0043] In some embodiments, the inner frame 214 includes two inner frame bodies 2141 and an inner connecting frame 2142. The two inner frame bodies 2141 are spaced apart along the transverse direction and define a second water passage 213. One end of the inner connecting frame 2142 is fixedly connected to one of the two inner frame bodies 2141, and the other end is fixedly connected to the other of the two inner frame bodies 2141. The connection between the inner connecting frame 2142 and the two inner frame bodies 2141 can be by welding, screwing, or other methods. Of course, the inner connecting frame 2142 and the two inner frame bodies 2141 can also be an integral component. The inner frame body 2141 is partially located in the receiving groove 115, which communicates with the receiving space 113. In this way, under the impact of the tailwater flow, the outer box 10 forms a barrier against the inner box 21, reducing the impact of the tailwater flow on the inner box 21, reducing the possibility of bending and damage to the inner frame body 2141, and ensuring that the inner box 21 can be placed stably in the outer box 10.

[0044] The shell 215 includes a bottom plate 2151 and multiple side plates 2152. The bottom plate 2151 is connected to the bottom of the inner frame body 2141. The multiple side plates 2152 are connected to the multiple sides of the inner frame body 2141 one by one. The bottom plate 2151 and the multiple side plates 2152 enclose a fish collection chamber 211a. The bottom plate 2151 and the multiple side plates are fixedly connected to the inner frame body 2141 by welding. This avoids leakage points in the fish collection chamber 211a and ensures that water will not leak out of the fish collection chamber 211a during the lifting process, so as to temporarily store the fish. Understandably, the fish inlet 212 is formed on one of the multiple side plates 2152 located downstream of the inner tank 21 along the tailwater flow. Alternatively, both a side plate 2152 located downstream of the inner tank 21 along the tailwater flow and a side plate 2152 opposite to the other side may be provided with fish inlets 212. The number of fish inlets 212 is set to be multiple and connected to the fish collection chamber 211a, which can improve the probability and efficiency of fish collection.

[0045] In some embodiments, the fish collecting chamber 211 further includes a net enclosure 211b communicating with the fish collecting compartment 211a. The net enclosure 211b is located above the fish collecting compartment 211a. The inner box 21 also includes a net enclosure disposed on the inner frame 214, and the net enclosure is located above the box shell, forming the net enclosure 211b. The net enclosure is provided with a fish inlet 212. Specifically, the net enclosure is disposed on the outer peripheral wall of the inner frame body 2141 and on the top of the inner frame body 2141 to construct the net enclosure 211b. The net enclosure can be fixed to the inner frame body 2141 by welding or by binding the inner frame body 2141 with wire. The net enclosure is made of stainless steel. The net enclosure can be selected with large or small mesh sizes according to actual needs, and no specific limitation is made here. By setting up the net enclosure 211b, the fish collecting area can be increased, further improving the probability and efficiency of fish collection. The enclosure net has multiple fish inlets 212 on one side of the inner box 21 along the downstream side of the tailwater flow. The multiple fish inlets 212 are spaced apart in the vertical direction, which can improve the probability and efficiency of fish collection.

[0046] A net enclosure 211b is installed above the fish collection chamber 211a, which increases the space for fish collection. During lifting, the water in the net enclosure 211b flows away, and all the fish are temporarily stored in the water-filled fish collection chamber 211a. This reduces the lifting weight and facilitates centralized management of the temporarily stored fish, making subsequent unified transfer and discharge easier. Understandably, both inner frame bodies 2141 have fish collection chambers 211a and net enclosures 211b, enabling fish collection on both sides of the tailwater flow, greatly improving the probability and efficiency of fish collection.

[0047] In some embodiments, the fish-collecting device 100 includes a fish guide 50, which is disposed in the outer casing 10. For example, the fish guide 50 is welded to the outer frame 11 or fixed to the outer frame 11 by screws. The fish guide 50 is located on the downstream side of the outer casing 10 along the direction of the tailwater flow. The fish guide 50 has a fish-guiding channel 53 communicating with the fish inlet 212. The fish-guiding channel 53 is funnel-shaped, and the fish guide 50 guides fish into the fish-collecting chamber 211 through the fish-guiding channel 53. This arrangement allows for the guided flow of fish into the fish-collecting chamber 211, improving the efficiency of fish collection. Furthermore, when the fish gather on the downstream side of the inner casing 21 under the action of the fish-attracting component 40, the fish guide 50 can more effectively and quickly guide the fish into the fish-collecting chamber 211 through the fish-guiding channel 53, further improving the efficiency of fish collection.

[0048] Understandably, the fish guide 50 can be a funnel-shaped fish guide net 51, which is fixedly installed on the outer connecting frame 112. The number of fish guides 50 can be set according to the number of fish inlets 212. That is, a fish guide net 51 is set at each fish inlet 212, which can greatly improve the fish collection probability and efficiency of the entire fish collecting device 100.

[0049] Please continue to refer to Figures 1 to 8 To ensure that the fish inlet 212 is open when the inner box 21 is placed inside the outer box 10, and closed when the inner box 21 is removed from the outer box 10, in some embodiments, the door assembly 22 includes a compartment door assembly 221. The compartment door assembly 221 is configured to open the fish inlet 212 when the inner box 21 is placed inside the outer box 10, driven by the outer box 10, and to close the fish inlet 212 when the inner box 21 is removed from the outer box 10. The compartment door assembly 221 can be located at each fish inlet 212, or only at the fish inlets 212 communicating with the fish collection compartment 211a. In this embodiment, the compartment door assembly 221 is located at the fish inlets 212 communicating with the fish collection compartment 211a.

[0050] In one embodiment, the door assembly 221 includes an escape-proof door 2211 and a torsion spring. The escape-proof door 2211 is rotatably connected to the shell 215 via a pin. The torsion spring is sleeved on the pin, with one end abutting against the shell 215 and the other end abutting against the escape-proof door 2211. Under the action of the torsion spring, the escape-proof door 2211 is in a closed fish inlet 212 state when not subjected to external force. However, under the action of external force, the escape-proof door 2211 can be pushed open to flip the escape-proof door 2211 until the fish inlet 212 is fully opened. The fish guide 50 has a contact part 52. When the inner box 21 is placed inside the outer box 10, the escape-proof door 2211 contacts and engages with the contact part 52. As the inner box 21 continues to move downward, the contact part 52 remains stationary, and the escape-proof door 2211 is gradually flipped until the fish inlet 212 is fully opened to communicate with the fish guide channel 53, thereby collecting fish.

[0051] In another embodiment, the door assembly 221 includes an escape-proof door 2211 that can move vertically and a counterweight protrusion. The escape-proof door 2211 is movably connected to the shell 215. The counterweight protrusion is located on the outside of the escape-proof door 2211. Under the gravity of the counterweight protrusion, the escape-proof door 2211 can move downward and automatically close the fish inlet 212. The fish guide 50 has a contact part 52. When the inner box 21 is placed inside the outer box 10, the counterweight protrusion and the contact part 52 stop and cooperate, while the inner box 21 continues to move downward and the contact part 52 remains stationary. The escape-proof door 2211 is gradually lifted until the fish inlet 212 is fully opened to communicate with the fish guide channel 53, thereby collecting fish.

[0052] It is worth noting that regardless of how the fish inlet 212 is opened or closed, the escape-proof door 2211 is equipped with a first sealing ring on the side facing the tank shell 215, and a second sealing ring is also provided on the edge of the fish inlet 212. When the escape-proof door 2211 closes the fish inlet 212, the sealing effect between the first and second sealing rings prevents water loss from the fish collection chamber 211a, thus allowing the fish to be temporarily stored in the fish collection chamber 211a. The escape-proof door 2211 is also equipped with a sealing protrusion, which can block the fish inlet 212 to prevent water loss from the fish collection chamber 211a.

[0053] Understandably, in the above embodiment, the fish inlet 212 can be located near the bottom of the box shell 215. In this way, the fish inlet 212 can not only collect fish, but also open the escape prevention door 2211 to release fish after the inner box 21 is lifted and transported, thereby realizing the transfer of fish.

[0054] In some embodiments, the bottom of the inner box 21 is provided with a valve port 2151a, that is, the bottom of the fish collection chamber 211a is provided with a valve port 2151a. The door assembly 22 includes a valve assembly 222 disposed in the inner box 21. The valve assembly 222 is used to open or close the valve port 2151a. That is, the valve assembly 222 is configured to close the valve port 2151a when the inner box 21 is removed from the outer box 10. It should be noted that when the inner box 21 is placed into the outer box 10, the valve assembly 222 opens the valve port 2151a. Optionally, the valve assembly 222 includes a valve seat 2221, a valve stem 2222, and a plug 2223. The valve seat 2221 is located outside the inner frame body 2141 and at the bottom of the inner frame body 2141, and is spaced apart from the base plate 2151. The valve seat 2221 is fixedly connected to the base plate 2151 via a connecting rod, and a through hole 2221a is passed through the middle of the valve seat 2221. The plug 2223 is located inside the fish collection chamber 211a. The valve stem 2222 has a connecting end and a contact end. The connecting end is fixedly connected to the plug 2223. The valve stem 2222 passes through the valve port 2151a to extend outside the fish collection chamber 211a, and the contact end also passes through the through hole 2221a and slides and is limited in fit with the valve seat 2221.

[0055] Without external force, the plug 2223 blocks the valve port 2151a under gravity, thus closing the valve port 2151a. When the inner box 21 is placed inside the outer box 10, the contact end of the valve stem 2222 is lifted by the bottom of the tailwater outlet 200 or by the bottom of the outer frame 11, causing the valve stem 2222 to move the plug 2223 upward, thereby opening the valve port 2151a. In some fish transport trucks or transfer fishing boats, the fish transport trucks or transfer fishing boats are equipped with a jacking device (such as a hydraulic jack). When the inner box 21 is lifted and transferred to the fish transport truck or transfer fishing boat, the jacking device pushes the valve stem 2222 upward, thereby moving the plug 2223 upward, thus opening the valve port 2151a. The fish and water in the fish tank 211a are then collected and transported to the fish transport truck or transfer fishing boat for timely transport upstream, thereby achieving fish ecosystem management.

[0056] Understandably, in the outer casing 10 assembly, there may be only one of the door assembly 221 and the valve assembly 222, or both of them may be provided. In this embodiment, there is only one of the door assembly 221 and the valve assembly 222.

[0057] Please continue to refer to Figures 1 to 8In some embodiments, the lifting and lowering of the outer casing 10 and the inner casing 21 are both achieved by a lifting device. The lifting device provides power and is connected to the inner casing 21 and / or the outer casing 10 via a lifting device. The lifting device is used at least to lift or lower the inner casing assembly 20. Understandably, the lifting device lifts the outer casing 10 via a lifting device to simultaneously lift the outer casing 10 and the inner casing assembly 20. The lifting device can be a wire rope, and the lifting device can be a gantry crane or other crane, without specific limitations.

[0058] In some embodiments, the outer casing 10 has a first suspension portion 13 for attaching lifting devices, and the inner casing 21 has a second suspension portion 216 for attaching lifting devices. This arrangement facilitates the attachment of the lifting device's hook via the first suspension portion 13 and the second suspension portion 216, improving lifting or installation efficiency. Optionally, both the first suspension portion 13 and the second suspension portion 216 can be lugs or holes, or other attachment structures; no specific limitation is made here.

[0059] Understandably, the outer wall of the side frame 111 is provided with a guide structure, such as a guide slider, so that when the outer box 10 is lifted or placed, it can cooperate with the groove wall of the door slot 201 to improve the smoothness of lifting or placing the outer box 10. The outer wall of the inner frame body 2141 is provided with a guide structure, such as a guide slider, so that when the inner box 21 is lifted or placed, it can cooperate with the groove wall of the receiving slot 115 to improve the smoothness of lifting or placing the inner box 21.

[0060] It is worth noting that there are two ways to install and upgrade the fish-collecting device 100: 1. The outer box 10 and the inner box 21 can be installed together in the door slot 201. During operation, the inner box 21 can be lifted separately. During non-operation periods, the outer box 10 and the inner box 21 can be lifted together to raise the entire fish collection device 100.

[0061] 2. During installation, first install the outer box 10 into the door slot 201, then install the inner box 21. During operation, only lift the inner box 21. During non-operational periods, lift the inner box 21 and then lift the outer box 10 to complete the removal of the fish collection device 100.

[0062] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0063] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fish-collecting device for collecting fish at the tailwater outlet, characterized in that, include: The outer casing is used to span across the tailrace outlet; An inner box assembly includes an inner box detachably assembled to the outer box so as to be separated from the outer box during a lifting operation of a hoisting device, wherein the inner box is used to collect fish; as well as Electrical components are mounted on the outer casing.

2. The fish-collecting device as described in claim 1, characterized in that, The electrical components include connected cables and electrical components, with the cables arranged outside the outer casing.

3. The fish-collecting device as described in claim 2, characterized in that, The electrical components include at least one of a monitoring component and a fish-attracting component.

4. The fish-collecting device as described in claim 1, characterized in that, The inner box has a fish collecting cavity and a fish inlet communicating with the fish collecting cavity; It also includes a door assembly disposed in the inner box, the door assembly being configured to open the fish inlet when the inner box is placed into the outer box, driven by the outer box, and to close the fish inlet when the inner box is removed from the outer box.

5. The fish-collecting device as described in claim 4, characterized in that, Also includes: A fish guide is provided on the outer box and has a fish guide channel communicating with the fish inlet. The fish guide is used to guide fish into the fish collection chamber through the fish guide channel.

6. The fish-collecting device as described in claim 1, characterized in that, The inner box has a fish-collecting chamber, and a valve port is provided at the bottom of the inner box; It also includes a valve assembly located in the inner box, the valve assembly being used to open or close the valve port.

7. The fish-collecting device as described in claim 1, characterized in that, The inner box contains a fish collection chamber, which includes a fish collection container located at the bottom of the inner box and capable of holding liquid.

8. The fish-collecting device as described in claim 7, characterized in that, The fish collection chamber also includes a perimeter netting compartment that communicates with the fish collection chamber and is located on the upper part of the inner box.

9. The fish-collecting device as described in claim 1, characterized in that, The outer casing has a first suspension part, and the inner casing has a second suspension part; The first suspension unit is configured to lift the inner box together with the lifting device, while the second suspension unit is configured to lift the inner box separately to separate it from the outer box under the action of the lifting device.

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