A fish expelling device and fish expelling system for a trash rack of a water intake of a hydropower station

Abstract

The utility model discloses a kind of fish expelling device and fish expelling system of water intake of hydropower station, the fish expelling device includes the waterproof shell connected with the edge side of trash rack, underwater light source, sound wave emitter and controller are arranged in waterproof shell, underwater light source, sound wave emitter and controller are sequentially arranged in waterproof shell from below to top along vertical direction, underwater light source and sound wave emitter are electrically connected with controller.The utility model is based on fish school behavior, utilize sound wave emitter to simulate the biological frequency emitted by carnivorous fish, simultaneously utilize the stimulation response of fish to different light frequency to disperse fish school, when fish school approaches water intake trash rack, be affected by the sound wave and light frequency emitted by fish expelling device, fish that first senses biological threat information will gather away, due to the existence of fish school effect, fish school will follow each other away, to reach the effect of expelling fish, to effectively protect fish in the water area near hydropower station.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydropower equipment, and in particular relates to a fish-repelling device and system for a trash rack at the intake of a hydropower station. Background Technology

[0002] During the maintenance and drainage of hydropower station units, a large number of dead fish are often found near the spiral casing drainage valve. The foul odor they emit creates poor working conditions for the power plant maintenance work. The death of fish causes direct economic losses to fishermen, and the reduction of fishery resources will further affect the economic income of local communities, especially areas that rely on fishing. Moreover, the impact of fish deaths is not limited to the fish themselves, but also affects the entire ecosystem. Fish are an important link in the food chain, and their reduction may lead to a decrease in the number of predators or a surge in the number of prey, disrupting the ecological balance. It is urgent to take appropriate measures to drive the fish in the intake area to prevent them from accidentally entering the unit's diversion section. Current mechanical fish deterrent devices are prone to trapping debris in the gaps between the rotating grid blades. They also consume a lot of energy. On the other hand, sound-based fish deterrent devices suffer from increased fish adaptability, resulting in poor long-term fish deterrence effects. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technology and provide a fish-repelling device and system for a debris screen at the intake of a hydropower station. Based on fish behavior, it uses a sound wave transmitter to simulate the biological frequencies emitted by carnivorous fish, and at the same time uses the fish's response to different light frequencies to disperse the fish. When the fish approach the debris screen at the intake, affected by the sound waves and light frequencies emitted by the fish-repelling device, the fish that first sense the biological threat will gather and move away. Due to the fish-swarming effect, the fish will follow each other away, thereby achieving the effect of repelling fish and protecting the fish in the waters near the hydropower station.

[0004] The objective of this utility model is achieved through the following technical solution: A fish-repelling device and system for a trash rack at the intake of a hydropower station includes a waterproof housing connected to the edge of the trash rack. An underwater light source, a sound wave transmitter, and a controller are installed inside the waterproof housing. The underwater light source, the sound wave transmitter, and the controller are arranged sequentially from bottom to top in the waterproof housing along the vertical direction. The underwater light source and the sound wave transmitter are both electrically connected to the controller. In this embodiment, underwater light sources and sound wave emitters arranged sequentially inside a waterproof shell emit sound waves and light frequencies to drive away fish using biological induction. Even if the fish that sense the biological threat gather and move away first, due to the fish school effect, the fish will follow each other away, thus achieving the effect of repelling fish. The controller controls the frequency of the underwater light sources and sound wave emitters according to the depth of the waterproof shell to target fish living in that depth area and prevent fish from accidentally entering the diversion section of the hydroelectric power station unit.

[0005] In one embodiment, one side of the waterproof housing is a rectangular mounting plate structure that extends vertically, and the other side is an arc-shaped plate structure.

[0006] In one embodiment, the top of the waterproof housing is further provided with a fixing base for connection to the edge side of the trash rack.

[0007] In one embodiment, the underwater light source is mounted on the mounting plate structure of the waterproof housing, and the flash of the underwater light source is directed towards the curved plate of the waterproof housing.

[0008] In one embodiment, the acoustic transmitter is mounted on the mounting plate structure of the waterproof housing, and the acoustic transmitter also has an arc-shaped emitting surface structure, which faces the arc-shaped plate of the waterproof housing. In this embodiment, the arc-shaped emitting surface structure of the sound wave emitter faces the arc-shaped plate of the waterproof shell, which can effectively increase the sound wave diffusion surface, reduce the blind zone of the fish repelling device, and improve the fish repelling effect.

[0009] In one embodiment, the underwater light source flashes at a frequency of 43 times per minute.

[0010] In one embodiment, the sound wave emitted by the sound wave transmitter has a range of 20~1000 Hz.

[0011] In one embodiment, connecting ropes are provided at both the top and bottom of the waterproof housing; This embodiment allows for the installation of multiple fish-repelling devices connected in series in the vertical direction to disperse fish at different depths, thereby improving the dispersal effect.

[0012] In one embodiment, the fixing base is disposed at both ends of the mounting plate structure, and the fixing base has fixing holes that connect to the edge side of the trash rack.

[0013] This utility model also provides a fish-repelling system for a debris screen at the intake of a hydropower station, including multiple fish-repelling devices as described above. The multiple fish-repelling devices are connected in series in the vertical direction, and the controller in each fish-repelling device is independently connected to its own sound wave transmitter and underwater light source to generate different sound wave frequency bands and light frequencies at different depths.

[0014] The beneficial effects of this utility model are as follows: The fish-repelling device provided by this utility model can repel fish based on the biological behavior of fish schools. It uses a sound wave transmitter to simulate the biological frequencies emitted by carnivorous fish, and at the same time uses the fish's response to different light frequencies to disperse the fish school. When the fish school approaches the inlet screen, affected by the sound waves and light frequencies emitted by the fish-repelling device, the fish that first sense the biological threat will gather and move away. Due to the fish school effect, the fish will follow each other away, thereby achieving the effect of repelling fish and preventing fish from accidentally entering the diversion section of the hydropower station unit. Attached Figure Description

[0015] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings. Wherein: Figure 1 A schematic diagram of the structure of this utility model is shown; Figure 2 A schematic diagram of the acoustic wave transmitter of this utility model is shown; Figure 3 This invention presents a schematic diagram of the underwater light source structure. In the accompanying drawings, the same parts use the same reference numerals. The drawings are not to scale.

[0016] Figure label: 1-Controller, 2-Underwater light source, 3-Sound wave transmitter, 4-Fixed base, 5-Waterproof housing, 6-Connecting rope, 201-Flash light, 301-Sound wave emission port. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] During operation, hydropower station units may cause fluctuations in water level, changes in water temperature, and accumulation of sediment in nearby waters, which can easily affect the survival of fish. The high-speed rotation of the turbine may also cause the oxygen in the water to become supersaturated or too low, and the discharge of water may cause the water to become supersaturated with bubbles, which may lead to the direct death of fish. In other words, when fish in the waters near the hydropower station units accidentally enter the diversion section of the units, it can easily cause large-scale fish deaths, which not only affects the ecological environment but also causes direct economic losses to fishermen. The applicant found that although fish repelling devices have been installed, there are still problems such as high energy consumption and poor fish repelling effect. For example, the gaps between the rotating grid blades of traditional mechanical fish repelling devices are prone to trapping debris, and mechanical fish repelling devices consume a lot of energy. On the other hand, sound fish repelling devices have the problem of fish adapting to the enhanced environment, and their long-term fish repelling effect is poor. This utility model provides a fish-repelling device for a debris screen at the intake of a hydropower station, such as... Figure 1 As shown, the device includes a waterproof housing 5 connected to the edge of the trash rack. An underwater light source 2, a sound wave transmitter 3, and a controller 1 are installed inside the waterproof housing 5. The underwater light source 2, the sound wave transmitter 3, and the controller 1 are arranged sequentially from bottom to top in the waterproof housing 5 in the vertical direction. The underwater light source 2 and the sound wave transmitter 3 are both electrically connected to the controller 1. In this embodiment, the fish repelling device uses underwater light source 2 and sound wave transmitter 3 arranged sequentially inside the waterproof shell 5 to emit sound waves and light frequencies, and uses biological induction to drive away the fish. Even if the fish that first sense the biological threat gather away, due to the fish school effect, the fish will follow each other away, thereby achieving the effect of repelling fish. The controller 1 controls the frequency of underwater light source 2 and sound wave transmitter 3 according to the depth of the waterproof shell 5 to target the fish living in the depth area and prevent fish from accidentally entering the diversion part of the hydropower station unit. Specifically, one side of the waterproof casing 5 is a rectangular mounting plate structure that extends vertically, and the other side is an arc-shaped plate structure. In this embodiment, the controller 1, the acoustic wave transmitter 3 and the underwater light source 2 are sequentially installed inside the waterproof housing 5 using the mounting plate structure on one side of the waterproof housing 5, while the arc-shaped plate structure on the other side can increase the acoustic wave diffusion surface to reduce the blind zone of the fish repelling device and improve the fish repelling effect.

[0019] In one embodiment, the top of the waterproof housing 5 is also provided with a fixing base 4 for connecting to the edge side of the debris barrier, which facilitates fixing the fish-repelling device and prevents it from being lost underwater. Specifically, such as Figure 1 As shown, the fixed base 4 is set at both ends of the mounting plate structure, and the fixed base 4 has a fixing hole that connects to the edge side of the trash rack.

[0020] In one embodiment, such as Figure 2As shown, the underwater light source 2 is mounted on the mounting plate structure of the waterproof housing 5, and the flash 201 of the underwater light source 2 faces the arc plate of the waterproof housing 5. In this embodiment, the flash light 201 emits red light and has a flash frequency of 43 flashes / min. It should be noted that, based on the underwater depth of the waterproof casing 5, and the corresponding fish population at that depth in the nearby waters, the controller 1 controls the flashing frequency of the flash lamp 201 to induce biological activity, causing the fish to sense a biological threat and quickly move away.

[0021] In one embodiment, the acoustic transmitter 3 is mounted on the mounting plate structure of the waterproof housing 5, and the acoustic transmitter 3 also has an arc-shaped emitting surface structure, which faces the arc-shaped plate of the waterproof housing 5.

[0022] It should be noted that in this embodiment, the acoustic transmitter 3 is provided with an arc-shaped emitting surface structure, and multiple uniform acoustic emission holes 301 are opened on the emitting surface structure. The arc-shaped emitting surface structure of the acoustic transmitter 3 is directly opposite the arc-shaped plate of the waterproof shell 5, which can effectively increase the acoustic diffusion surface, reduce the blind zone of the fish repelling device, and further improve the fish repelling effect. In this embodiment, the sound wave emitted by the sound wave transmitter 3 has a range of 20~1000 Hz. Similarly, based on the underwater depth of the waterproof shell 5 and the fish population at that depth in the nearby waters, the controller 1 controls the frequency of the sound wave emitted by the sound wave transmitter 3 to induce biological activity, so that the fish population senses the biological threat and quickly moves away.

[0023] In one embodiment, such as Figure 1 As shown, the top and bottom of the waterproof casing 5 are equipped with connecting ropes 6, which can be used to set up multiple fish-repelling devices connected in the vertical direction to disperse various fish at different depths and improve the dispersal effect.

[0024] This utility model also provides a fish-repelling system for a debris screen at the intake of a hydropower station, including multiple fish-repelling devices connected in series in the vertical direction, and each fish-repelling device's controller 1 is independently connected to its internal acoustic transmitter 3 and underwater light source 2 to generate different acoustic frequency bands and optical frequencies at different depths. It should be noted that in the entire fish repelling system, multiple fish repelling devices are connected in series vertically for easy fixation. At the same time, the controller 1 in each fish repelling device is controlled independently to target and disperse fish living at different water depths, effectively protecting fish in the waters near the hydropower station.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., 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 utility model 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, they should not be construed as limitations on this utility model.

[0026] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A fish-repelling device for a trash rack at the intake of a hydropower station, characterized in that, The device includes a waterproof housing connected to the edge of a trash rack. An underwater light source, a sound wave transmitter, and a controller are installed inside the waterproof housing. The underwater light source, the sound wave transmitter, and the controller are arranged sequentially from bottom to top in the waterproof housing along the vertical direction. The underwater light source and the sound wave transmitter are both electrically connected to the controller.

2. The fish-repelling device for a trash rack at the intake of a hydropower station according to claim 1, characterized in that, One side of the waterproof casing is a rectangular mounting plate structure that extends vertically, and the other side is an arc-shaped plate structure.

3. A fish-repelling device for a trash rack at the intake of a hydropower station according to claim 2, characterized in that, The top of the waterproof housing is also provided with a fixed base for connecting to the edge side of the trash rack.

4. A fish-repelling device for a trash rack at the intake of a hydropower station according to claim 2, characterized in that, The underwater light source is mounted on the mounting plate structure of the waterproof housing, and the flash of the underwater light source is facing the arc-shaped plate of the waterproof housing.

5. A fish-repelling device for a trash rack at the intake of a hydropower station according to claim 2, characterized in that, The acoustic wave transmitter is mounted on the mounting plate structure of the waterproof housing, and the acoustic wave transmitter also has an arc-shaped emitting surface structure, which faces the arc-shaped plate of the waterproof housing.

6. A fish-repelling device for a trash rack at the intake of a hydropower station according to claim 1, characterized in that, The underwater light source has a flash frequency of 43 times / min.

7. A fish-repelling device for a trash rack at the intake of a hydropower station according to claim 1, characterized in that, The sound wave emitted by the sound wave transmitter has a range of 20~1000 Hz.

8. A fish-repelling device for a trash rack at the intake of a hydropower station according to claim 1, characterized in that, Connecting ropes are provided at the top and bottom of the waterproof casing.

9. A fish-repelling device for a trash rack at the intake of a hydropower station according to claim 3, characterized in that, The fixed base is located at both ends of the mounting plate structure, and the fixed base has a fixing hole that connects to the edge side of the trash rack.

10. A fish-repelling system for a debris screen at the intake of a hydropower station, comprising a plurality of fish-repelling devices for a debris screen at the intake of a hydropower station as described in any one of claims 1 to 9, characterized in that, Multiple trash rack fish-repelling devices at the intake of the hydropower station are connected in series vertically, and the controller in each trash rack fish-repelling device is independently connected to its acoustic transmitter and underwater light source to generate different acoustic and optical frequencies at different depths.

Images