Fish blocking and driving system for tail water hole of hydropower station

Abstract

The utility model provides a fish blocking and driving system for a tail water hole of a hydropower station, the tail water hole is provided with a plurality of synchronously lifting second pulse electric poles, the second pulse electric poles incline towards the water flow direction, the bottom of the tail water hole is also provided with a lifting device, and the lifting device is connected with the plurality of second pulse electric poles; a plurality of first pulse electric poles are further arranged in the tailrace tunnel and arranged on a fixed beam, an access hole is formed in the upper portion of the interior of the tailrace tunnel, a gantry crane is arranged on the platform above the access hole, the fixed beam penetrates through the access hole and is connected with a gantry crane lifting appliance through a sling, and a fish finding sonar is further arranged on the inner side of the first pulse electric pole. The system has the advantages that fishes can be effectively prevented from entering the tail water hole, so that loss and danger are reduced. Due to the fact that the pulse electric pole is obliquely arranged, garbage and other waste can be effectively prevented from being accumulated at the bottom. The effect of effectively driving the fishes is achieved, and economic losses and potential safety hazards caused by the fact that the fishes enter the tail water hole by mistake are reduced.

Description

Technical Field

[0001] The utility model relates to the field of fish interception at tailwater tunnels, in particular to a fish interception and fish driving system used at tailwater tunnels of hydropower stations. Background Art

[0002] Water conservancy facilities such as dams and hydropower stations have become a key component in achieving sustainable use of water resources. However, while meeting the functions of energy production and water resource regulation, such facilities have a significant impact on the surrounding ecological environment, especially fish resources. Especially during the drainage and maintenance of the tailwater area of ​​the dam unit, a large number of migratory fish often gather and are captured in the tailwater hole. Due to the special water flow conditions in this area, fish are easily drawn into the tailwater hole, resulting in a large number of stranded deaths, which in turn leads to a significant reduction in fish resources.

[0003] In order to effectively protect fish populations and their biodiversity, researchers have conducted in-depth exploration and practice of various fish-driving technologies around the world. These technologies mainly involve a variety of means such as sound, light, electricity, bubble curtains, water flow control, pheromones, and magnetic fields, aiming to build non-physical eco-friendly barriers to guide fish to avoid dangerous areas and reduce the risk of mistakenly entering tailwater holes.

[0004] Among them, light-driven fish repelling technology uses the negative phototaxis characteristics commonly found in fish to effectively repel fish through light sources of specific light color and light intensity. The selection of light color and the regulation of light intensity are key factors in determining the repelling effect, and need to be scientifically designed based on the visual sensitivity and behavioral response of the target fish.

[0005] The sound-driven fish technology is based on the negative phonotactic response of fish to specific sound signals. It induces fish to stay away from potential threat areas by releasing sound waves of specific types and intensities. The selection of sound types should take into account the hearing characteristics of the target fish and their tendency to avoid sounds of different frequencies and patterns, while the sound intensity should ensure that it can trigger the fish's escape response without excessively interfering with their normal living habits.

[0006] The electric fish repelling technology uses the behavioral response of fish in an electric field to achieve the purpose of repelling. After sensing the electric field, fish usually show evasive behavior. The electric fish repelling equipment generates an electric field with a specific voltage intensity to prompt fish to change their swimming direction and avoid entering the tailwater hole. However, when the electric repelling technology is applied at the tailwater hole with a faster water flow, its fish blocking effect may be limited because the fast water flow may weaken the stability of the electric field and the repelling effect.

[0007] Although the above technologies have their own characteristics and applicable conditions, current research shows that electric field fish driving technology has shown the best driving efficiency in most cases. However, given its limitations in high-speed water flow environments, it is still necessary to further develop electric drive devices that adapt to complex water flow conditions or combine other technical means to improve the fish protection efficiency in special application scenarios such as tailwater tunnels.

[0008] In summary, the compatibility issue between fish protection and water conservancy engineering facilities has attracted widespread attention, and multidisciplinary research on fish-driving technology is constantly advancing, aiming to seek more accurate, efficient and less impactful solutions on the ecological environment, so as to achieve harmonious coexistence between water conservancy projects and fish ecosystems. Utility Model Content

[0009] The main purpose of the utility model is to provide a fish intercepting and driving fish system for a tailwater tunnel of a hydropower station, so as to solve the problem that the fish intercepting effect of arranging an electric field at a tailwater tunnel with a fast water flow speed is poor.

[0010] In order to solve the above technical problems, the technical solution adopted by the utility model is: a fish intercepting and driving fish system for the tailwater tunnel of a hydropower station, a plurality of synchronously lifting second pulse poles are arranged at the tailwater tunnel, the second pulse poles are inclined in the direction of water flow, and a lifting device is also arranged at the bottom of the tailwater tunnel, the lifting device is connected to the plurality of second pulse poles;

[0011] There are also multiple first pulse poles inside the tailwater tunnel, which are set on the fixed beam. There is an inspection port above the tailwater tunnel, and a gantry crane is installed on the platform above the inspection port. The fixed beam passes through the inspection port and is connected to the gantry crane through a sling.

[0012] There is also a fish-finding sonar on the inside of the first pulse pole.

[0013] In the preferred embodiment, an inclined water-guiding slope is provided in front of the tailwater tunnel entrance, the second pulse electric pole is arranged on the water-guiding slope, a control groove is provided inside the water-guiding slope, the lifting device is arranged inside the control groove, and the second pulse electric pole slides on the control groove and retracts inside the water-guiding slope;

[0014] The angle between the second pulse pole and the water-conducting slope is 50-70°.

[0015] In the preferred embodiment, a plurality of second pulse electric poles are slidably connected to the water guide slope, and the structure of the lifting device is as follows: a driving motor is provided on one side of the inner side of the water guide slope, the driving motor is connected to a gear box, the gear box is connected to a transmission rod, the transmission rod is inserted into the inner side of the control groove, a plurality of worms are provided on the transmission rod, and a plurality of inclined holes are also provided on the water guide slope, and the plurality of inclined holes are connected to the control groove;

[0016] A screw is arranged inside the inclined hole of the water guide slope, the lower end of the screw is connected with a worm gear, the worm gear is meshed with the worm, and the screw is threadedly connected with the second pulse electric pole.

[0017] In the preferred embodiment, the second pulse pole is slidably connected inside the inclined hole of the water-guiding slope, the inclined groove body of the water-guiding slope is connected to the control groove, and sliding blocks are provided on both sides of the lower end of the second pulse pole, and the sliding blocks are slidably connected to the inclined groove body of the water-guiding slope.

[0018] In the preferred embodiment, a sealing ring is provided between the second pulse electric pole and the upper end of the trough body with the inclined water guide slope.

[0019] In the preferred embodiment, the width of the fixed beam is less than or equal to the width of the inspection opening, and a plurality of first pulse poles are hinged to the fixed beam.

[0020] In the preferred embodiment, a counterweight block is provided at the lower end of multiple first pulse poles. The counterweight block has a conical structure, and a limit groove is opened at the bottom relative to the inspection port of the tailwater tunnel. After the counterweight block is lowered, it is arranged inside the limit groove.

[0021] In the preferred solution, limit blocks are provided on both sides of the fixed beam, and the limit blocks are used to limit the swing angle of the second pulse pole.

[0022] In the preferred embodiment, a pulse voltage driver is also provided, and the pulse voltage driver is electrically connected to the first pulse pole and the second pulse pole.

[0023] The utility model provides a fish intercepting and driving fish system for the tailwater tunnel of a hydropower station. Aiming at the situation where the water flow velocity inside the tailwater tunnel is relatively fast, an innovative double pulse electric pole system is designed to efficiently intercept fish and prevent garbage accumulation. The system cleverly combines two pulse electric poles with different settings to meet the needs of fish driving under different water flow conditions.

[0024] First, the second pulse poles are tilted to cope with fast-flowing water. This layout enables the poles to form a dynamic and efficient electric grid structure to intercept fish in the water. By increasing the voltage of the second pulse poles, the repelling effect of the electric field can be significantly enhanced, effectively preventing fish from trying to cross the electric field and enter the tailwater hole. In addition, the tilted poles not only help to form a strong fish-blocking barrier, but also use the principles of hydrodynamics to reduce the deposition of garbage and other waste at the bottom of the tailwater hole, keep the hole clean, and reduce the difficulty and maintenance cost of subsequent cleaning.

[0025] At the same time, for areas with relatively slow water flow, the system is equipped with the first pulse pole, which is set vertically. This layout can build a denser and continuous fish intercepting electric grid wall, like a solid barrier, strictly blocking fish from approaching and entering the tailwater hole. The tight electric field grid formed by the vertical poles significantly improves the interception effect on fish, especially in environments with slow flow and easy access to the hole for fish, effectively reducing the loss of biological resources and potential safety risks caused by fish mistakenly entering the tailwater hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0027] Figure 1 It is a schematic diagram of the overall layout of the tailwater tunnel of the utility model;

[0028] Figure 2 This is a schematic diagram of the top view of the pulse pole arrangement of the tailwater tunnel of the utility model;

[0029] Figure 3 This is a schematic diagram of the second pulse pole lifting mechanism of the utility model;

[0030] Figure 4 It is a schematic diagram of the overall layout of the second pulse pole of the utility model;

[0031] Figure 5 It is a schematic diagram of the overall layout of the first pulse pole of the utility model.

[0032] In the figure: dam body 1; tailwater hole 2; fish-finding sonar 201; gantry crane 3; inspection port 4; fixed beam 5; limit block 501; first pulse electric pole 6; counterweight block 7; second pulse electric pole 8; control slot 9; drive motor 10; gear box 11; transmission rod 12; worm 13; worm wheel 14; screw 15; sliding block 16; sealing ring 17; limit slot 18. DETAILED DESCRIPTION

[0033] Example 1

[0034] like Figures 1 to 5As shown, a fish intercepting and driving fish system for the tailwater tunnel of a hydropower station, the tailwater tunnel 2 is provided with a plurality of synchronously lifting second pulse poles 8, the second pulse poles 8 are inclined in the direction of water flow, and a lifting device is also provided at the bottom of the tailwater tunnel 2, and the lifting device is connected to the plurality of second pulse poles 8; the tailwater tunnel 2 is also provided with a plurality of first pulse poles 6, and the plurality of first pulse poles 6 are arranged on a fixed beam 5, an inspection port 4 is provided above the tailwater tunnel 2, a gantry crane 3 is provided on the platform above the inspection port 4, and the fixed beam 5 passes through the inspection port 4 and is connected to the gantry crane 3 through a sling, and a fish-finding sonar 201 is also provided inside the first pulse pole 6. When the water flow velocity inside the tailwater tunnel 2 is fast, the second pulse pole 8 is used to form an electric grid to intercept fish, the voltage of the second pulse pole 8 is increased, and the effect of intercepting fish is increased, and the inclined arrangement can effectively prevent garbage and other waste from accumulating at the bottom. The first pulse pole 6 is arranged vertically. When the water flow rate is relatively slow, the first pulse pole 6 can form a tighter fish blocking electric net wall to prevent fish from entering the tailwater hole 2. The advantage of this system is that it can effectively prevent fish from entering the tailwater hole, thereby reducing losses and dangers.

[0035] The system aims to adapt to different flow conditions through a multi-layer protection mechanism, effectively prevent fish from mistakenly entering the tailwater hole, prevent garbage deposition, and reduce damage to biological resources and safety hazards. The system mainly consists of the following parts:

[0036] The second pulse pole 8 is located at the entrance of the tailwater tunnel 2, and multiple second pulse poles 8 are provided that rise and fall synchronously. These poles are tilted in the direction of the water flow to adapt to the fast water flow conditions. By increasing the voltage, the second pulse pole 8 can form an electric grid fish intercepting system with a strong driving effect. The tilted setting not only enhances the driving effect of the electric field on fish, but also utilizes the principle of water flow dynamics to effectively prevent garbage and other waste from accumulating at the bottom of the tailwater tunnel, keeping the tunnel clean.

[0037] A special lifting device is installed at the bottom of the tailwater tunnel 2, which is connected to multiple second pulse poles 8. This design allows operators to adjust the height of the poles according to actual needs to adapt to different water flow conditions or perform equipment maintenance, ensuring the flexibility and effectiveness of the fish interception effect.

[0038] First pulse pole 6: Inside the tailwater tunnel 2, there are multiple first pulse poles 6, which are fixedly mounted on the fixed beam 5 across the tunnel opening. These poles are arranged vertically and are suitable for areas with relatively gentle water flow. The vertically arranged first pulse poles 6 can form a dense fish-blocking electric net wall, effectively preventing fish from approaching and entering the tailwater tunnel opening, and providing a static, high-strength defense barrier.

[0039] Inspection port 4 and gantry crane 3: Inspection port 4 is provided above the tailwater tunnel 2 for easy inspection and maintenance of equipment. Gantry crane 3 is provided above the inspection port 4, which is connected to fixed beam 5 through slings, so that first pulse pole 6 can be conveniently lifted or lowered, realizing rapid deployment or removal, greatly improving the operability and maintenance efficiency of the system.

[0040] Fish Finder Sonar 201 The first pulse pole 6 also integrates a fish finder sonar 201 device. The sonar system can monitor the fish activities around and inside the tailwater hole in real time, provide real-time data support for system operation, help optimize the voltage setting and operation strategy of the pole, and even warn of potential large-scale fish approaching in advance, ensuring the accurate response of the fish interception and fish driving system.

[0041] Multi-level protection: Through the coordinated work of the second pulse pole 8 (for fast water flow) and the first pulse pole 6 (for gentle water flow), comprehensive coverage of different flow rate areas at the tailwater hole and effective fish interception are achieved.

[0042] Adaptability: The lifting device enables the second pulse pole 8 to be adjusted in height according to changes in water flow, ensuring the dynamic adaptability of the fish blocking effect.

[0043] Efficient cleaning: The tilted second pulse pole 8 helps prevent garbage accumulation and reduces the burden of subsequent cleaning.

[0044] Intelligent Monitoring: Built-in fish-finding sonar monitors fish activity in real time, providing precise guidance for system operation and improving fish interception efficiency and accuracy.

[0045] Convenient maintenance: The inspection port and gantry crane are used to simplify the maintenance and replacement of poles, ensuring long-term and stable operation of the system.

[0046] In the preferred embodiment, an inclined water-guiding slope is provided in front of the tailwater tunnel 2, a second pulse electric pole 8 is arranged on the water-guiding slope, a control groove 9 is arranged inside the water-guiding slope, a lifting device is arranged inside the control groove 9, and the second pulse electric pole 8 slides and retracts inside the water-guiding slope on the control groove 9; the angle between the second pulse electric pole 8 and the water-guiding slope is 50-70°. The second pulse electric pole 8 is arranged inclined, which can effectively prevent garbage and other waste from accumulating at the bottom. The effect of effectively driving away fish is achieved, and the economic losses and safety hazards caused by fish mistakenly entering the tailwater tunnel are reduced.

[0047] An inclined water-guiding slope is set in front of the tailwater tunnel 2, aiming to use the terrain to guide the direction of water flow and slow down the impact of water flow, which is conducive to improving the stability and efficiency of the entire fish interception and fish driving system. The design of the water-guiding slope helps to disperse the energy of water flow, reduce the direct impact on equipment such as poles, and extend the service life of equipment.

[0048] The second pulse electric pole 8 is directly set on the water-conducting slope, making full use of the slope's inclination angle to enhance the electric pole's effect of driving away fish in fast water flow. The electric pole maintains a certain angle with the water flow direction, further enhancing the electric field's repelling effect on fish and improving the success rate of fish interception.

[0049] A control groove 9 is specially designed inside the water-conducting slope to accommodate the lifting device. The second pulse pole 8 can slide and retract in the control groove 9, which means that the pole can be adjusted in height according to actual needs to adapt to different water flow conditions or perform equipment maintenance. This design greatly enhances the flexibility and practicality of the system.

[0050] The angle between the second pulse electric pole 8 and the water-conducting slope is set between 50-70 degrees. This angle range not only ensures the effective fish-driving effect of the electric pole in fast water flow, but also facilitates the use of the principle of water flow dynamics to guide the bottom garbage and other waste to both sides of the slope, preventing them from accumulating at the bottom of the tailwater tunnel and keeping the tunnel clean.

[0051] The second pulse pole 8 is tilted, combined with the careful design of the water guide slope and the control groove 9, to achieve the following multiple effects:

[0052] Efficient fish driving: Through the synergistic effect of electric poles and water flow, fish can be effectively driven away from the tailwater hole, significantly reducing the economic losses and ecological risks caused by fish straying into the hole.

[0053] Anti-garbage accumulation: The inclined setting of the poles and the slope guidance effectively prevent garbage and other waste from accumulating at the bottom of the tailwater tunnel, maintain a clean environment in the tunnel, and reduce cleaning costs.

[0054] Adaptive adjustment: By controlling the lifting device in the trough 9, the height of the pole can be flexibly adjusted according to the water flow conditions to ensure a good fish blocking effect under various flow rate conditions.

[0055] Equipment protection and convenient maintenance: The combined design of the water-conducting slope and the control groove 9 not only helps to protect the poles from strong water flow impact, but also simplifies the maintenance and replacement process of the poles, ensuring the long-term stable operation of the system.

[0056] In the preferred embodiment, multiple second pulse electric poles 8 are slidably connected to the water-conducting slope, and the structure of the lifting device is as follows: a driving motor 10 is provided on one side of the inner side of the water-conducting slope, the driving motor 10 is connected to a gear box 11, the gear box 11 is connected to a transmission rod 12, the transmission rod 12 is inserted into the control groove 9, and multiple worms 13 are provided on the transmission rod 12. The water-conducting slope is also provided with multiple inclined holes, and the multiple inclined holes are connected to the control groove 9; a screw 15 is provided inside the inclined hole of the water-conducting slope, the lower end of the screw 15 is connected to a worm wheel 14, the worm wheel 14 is meshed with the worm 13, and the screw 15 is threadedly connected to the second pulse electric pole 8. The driving motor 10 synchronously drives multiple second pulse electric poles 8 to rise and fall synchronously.

[0057] A set of precise mechanical transmission system is designed for the lifting device of the second pulse pole 8 to ensure that multiple poles can be lifted and lowered synchronously and smoothly. The following is the specific structure and working principle of the lifting device:

[0058] The plurality of second pulse poles 8 are slidably connected to the water-conducting slope surface, ensuring that the poles can slide freely in the control groove 9, making it easy to perform lifting and lowering adjustments.

[0059] The driving motor 10 is located at one side of the inner surface of the water guide slope and serves as the power source of the entire lifting device. The driving motor 10 is driven by electricity and outputs stable rotational power.

[0060] The gear box 11 is directly connected to the drive motor 10, which plays the role of reducing speed and increasing torque, converting the high-speed rotation of the motor into a low-speed and high-torque output suitable for the lifting and lowering of the pole.

[0061] The transmission rod 12 is connected to the gear box 11 and passes through the control slot 9. The transmission rod 12 is responsible for evenly distributing the torque transmitted by the gear box to the lifting mechanism of each pole.

[0062] The worm 13 is arranged on the transmission rod 12 and is distributed linearly. The worm 13 converts the rotational motion into the linear motion by meshing with the worm wheel, so as to realize the lifting and lowering action of the electric pole.

[0063] The water-guiding slope is designed with a plurality of inclined holes connected with the control groove 9. These holes provide installation space for the worm gear transmission mechanism and also facilitate the lifting and moving of the electric pole in the holes.

[0064] A screw 15 is arranged inside each inclined hole, and its lower end is connected to a worm wheel 14. The worm wheel 14 is precisely meshed with the worm 13 to form a pair of transmission pairs. When the worm rotates, the screw is driven to rotate through the worm wheel.

[0065] The bottom of each second pulse electric rod 8 is connected to the corresponding screw rod 15 through a thread. When the screw rod rotates under the drive of the worm gear, the electric rod will move along the axial direction of the thread to achieve lifting.

[0066] The driving motor 10 realizes the synchronous lifting and lowering control of all the second pulse poles 8 through a series of transmission components such as a gear box, a transmission rod, a worm, a worm wheel, and a screw. This ensures that when the height of the poles is adjusted, all poles can maintain a consistent lifting speed and position, ensuring the stability and effectiveness of the fish intercepting power grid.

[0067] In the preferred embodiment, the second pulse pole 8 is slidably connected inside the inclined hole of the water-conducting slope, the inclined groove of the water-conducting slope is connected to the control groove 9, and sliding blocks 16 are provided on both sides of the lower end of the second pulse pole 8, and the sliding blocks 16 are slidably connected to the inclined groove of the water-conducting slope. The sliding blocks 16 prevent the second pulse pole 8 from rotating, and also play a technical effect of guiding sliding.

[0068] The inclined holes inside the water-conducting slope are interconnected with the control groove 9 to form a continuous sliding channel, providing an obstacle-free spatial path for the lifting and lowering movement of the second pulse electric pole 8.

[0069] The main body of the second pulse pole 8 is embedded in the inclined hole of the water-conducting slope and slides up and down along the hole wall. This sliding connection ensures that the pole always maintains close contact with the water-conducting slope during the lifting process, avoiding shaking or deviation caused by factors such as water flow impact.

[0070] The sliding block 16 is arranged on both sides of the lower end of the second pulse pole 8 and is slidably connected to the groove body on the inner wall of the inclined hole on the water guide slope. The main functions of the sliding block 16 are two aspects:

[0071] Prevent the pole from rotating: The matching design of the sliding block 16 and the water-conducting slope trough makes the pole constrained by the trough during the lifting process, and prevents unnecessary rotation, ensuring that the pole is always lifted along a preset straight line trajectory, keeping the structure of the fish intercepting power grid stable.

[0072] Guide sliding: The sliding connection between the sliding block 16 and the slot body provides precise guiding for the second pulse pole 8, ensuring that the pole moves smoothly and accurately along the guiding path of the slot body during the lifting process, avoiding deviation or jamming, and ensuring the smoothness and safety of the pole lifting process.

[0073] In the preferred embodiment, a sealing ring 17 is provided between the second pulse electric pole 8 and the upper end of the trough body with the inclined water guide slope. The sealing ring 17 has a technical effect of waterproofing.

[0074] In the preferred embodiment, the width of the fixed beam 5 is less than or equal to the width of the inspection port 4, and a plurality of first pulse poles 6 are hinged to the fixed beam 5. This facilitates the positioning of the fixed beam 5 at the inspection port 4 to prevent the fixed beam 5 from swinging with the water flow. The first pulse pole 6 and the fixed beam 5 are hinged. When the first pulse pole 6 is lifted, the garbage on the first pulse pole 6 will slide off the first pulse pole 6 as the first pulse pole 6 rotates. When the first pulse pole 6 is lifted and there is garbage on the first pulse pole 6, the first pulse pole 6 will tilt. After the first pulse pole 6 tilts, the garbage on the first pulse pole 6 will slide off.

[0075] In the preferred embodiment, a counterweight block 7 is provided at the lower end of each of the first pulse poles 6. The counterweight block 7 is in a conical structure. A limit groove 18 is provided at the bottom relative to the inspection port 4 of the tailwater tunnel 2. After the counterweight block 7 is lowered, it is arranged inside the limit groove 18. The counterweight block 7 facilitates the first pulse pole 6 to be hammered down.

[0076] The width of the fixed beam 5 is designed to be smaller than or equal to the width of the inspection opening 4, ensuring that the fixed beam 5 can smoothly pass through the inspection opening 4 when the equipment is inspected or replaced, avoiding operational difficulties caused by inappropriate sizes.

[0077] In order to prevent the fixed beam 5 from swinging with the water flow, the system sets a corresponding limit device or structure at the inspection port to ensure that the fixed beam 5 remains stable in the working state, thereby enhancing the structural rigidity and reliability of the entire fish intercepting power grid.

[0078] The plurality of first pulse poles 6 are connected to the fixed beam 5 in an articulated manner, so that the poles can be flexibly rotated within a certain range. This structural design is conducive to the poles adapting to the change of water flow during the lifting or lowering process, and can ensure that the poles remain vertical in a static state, forming a tight fish intercepting electric net wall.

[0079] When the first pulse pole 6 needs to be lifted, if there is garbage attached to the pole, the hinged structure allows the pole to tilt moderately during the lifting process. This tilting action allows the attached garbage to slide naturally due to gravity, without the need for additional cleaning operations, effectively keeping the pole surface clean and preventing garbage accumulation from affecting the electric field fish repelling effect.

[0080] In the preferred solution, limit blocks 501 are further provided on both sides of the fixed beam 5 , and the limit blocks 501 are used to limit the swing angle of the second pulse pole 8 .

[0081] The limit blocks 501 are installed on both sides of the fixed beam 5, and are designed to limit the swing angle of the second pulse pole 8. When the pole swings sideways under the action of the water flow, the limit blocks 501 will contact and block the pole from continuing to swing, thereby controlling its swing amplitude within the allowable range, ensuring that the pole maintains a reasonable tilt angle and continues to play an effective role in blocking fish.

[0082] By limiting the swing angle of the second pulse pole 8 by the limit block 501, it can be ensured that the pole is always in the optimal working position required by the design, avoiding problems such as uneven electric field distribution and weakened fish interception effect caused by excessive swinging. This helps to maintain the overall structural stability and fish interception efficiency of the fish interception power grid.

[0083] The presence of the limit block 501 can also prevent the second pulse pole 8 from colliding with other equipment or structures due to excessive swinging, thereby effectively protecting the pole itself and surrounding equipment from damage, extending the service life of the equipment and reducing maintenance costs.

[0084] In the preferred embodiment, a pulse voltage driver is also provided, and the pulse voltage driver is electrically connected to the first pulse electric rod 6 and the second pulse electric rod 8 .

[0085] Example 2

[0086] Further illustrate with reference to Example 1, Figure 1-5 In the structure shown, when the flow velocity of the tailwater tunnel 2 reaches 1-3 m / s, the vertical first pulse pole 6 is lifted from the inspection port 4 by the gantry crane 3, and the counterweight block 7 at the end of the first pulse pole 6 reaches the inspection port 4 and stops lifting;

[0087] The driving motor 10 drives the worm 13 to rotate, and the worm wheel 14 driven by the worm 13 rotates, and the multiple second pulse electric rods 8 driven by the worm wheel 14 begin to rise, and the second pulse electric rods 8 push to the top and then stop pushing;

[0088] The pulse voltage driver starts to supply power to the second pulse pole 8, and the second pulse pole 8 starts to discharge to form an electric wall to block fish;

[0089] When the water flow velocity in the tailwater tunnel 2 drops to 0.1-1m / s, the gantry crane 3 starts to lower the first pulse pole 6, and the counterweights 7 at the lower ends of the multiple first pulse poles 6 sink to the position of the limit groove 18. The fixed beam 5 is set at the position of the inspection port 4 to fix the multiple first pulse poles 6 at the position between the inspection port 4 and the limit groove 18;

[0090] The pulse voltage driver starts to supply power to the first pulse pole 6, and the first pulse pole 6 starts to discharge to form an electric wall to block fish;

[0091] At the same time, the driving motor 10 drives the second pulse pole 8 to start to retract, and the second pulse pole 8 retracts to the inside of the water diversion slope of the tailwater tunnel 2;

[0092] The fish-finding sonar 201 inside the tailwater hole 2 detects the number of fish swimming inside, and monitors whether the first pulse pole 6 and the second pulse pole 8 have failed. When the number of fish detected by the fish sonar 201 reaches the threshold requirement, the first pulse pole 6 or the second pulse pole 8 has failed, and the construction personnel begin to inspect the pulse voltage driver and the line, and determine whether the first pulse pole 6 or the second pulse pole 8 has failed by observing the movement of the fish through the fish-finding sonar 201.

[0093] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A fish intercepting and driving fish system for a tailwater tunnel of a hydropower station, characterized by: A plurality of synchronously rising and falling second pulse poles (8) are provided at the tailwater tunnel (2) entrance, the second pulse poles (8) being inclined in the direction of the water flow, and a lifting device is also provided at the bottom of the tailwater tunnel (2), the lifting device being connected to the plurality of second pulse poles (8); A plurality of first pulse electric poles (6) are also provided inside the tailwater tunnel (2), and the plurality of first pulse electric poles (6) are arranged on the fixed beam (5). An inspection port (4) is provided above the inside of the tailwater tunnel (2), and a gantry crane (3) is provided on the platform above the inspection port (4). The fixed beam (5) passes through the inspection port (4) and is connected to the gantry crane (3) via a sling. A fish-finding sonar (201) is also provided inside the first pulse electric pole (6).

2. A fish intercepting and driving fish system for a tailwater tunnel of a hydropower station according to claim 1, characterized in that: An inclined water-guiding slope is provided in front of the tailwater tunnel (2) opening, a second pulse electric pole (8) is arranged on the water-guiding slope, a control groove (9) is provided inside the water-guiding slope, a lifting device is arranged inside the control groove (9), and the second pulse electric pole (8) slides on the control groove (9) and retracts inside the water-guiding slope; The angle between the second pulse electric pole (8) and the water-conducting slope is 50-70°.

3. A fish intercepting and driving fish system for a tailwater tunnel of a hydropower station according to claim 2, characterized in that: A plurality of second pulse electric poles (8) are slidably connected to the water guide slope, and the structure of the lifting device is as follows: a driving motor (10) is provided on one side of the water guide slope, the driving motor (10) is connected to a gear box (11), the gear box (11) is connected to a transmission rod (12), the transmission rod (12) is inserted into the control groove (9), a plurality of worm gears (13) are provided on the transmission rod (12), and a plurality of inclined holes are also provided on the water guide slope, and the plurality of inclined holes are connected to the control groove (9); A screw rod (15) is provided inside the inclined hole of the water guide slope, the lower end of the screw rod (15) is connected to the worm wheel (14), the worm wheel (14) is meshed with the worm rod (13), and the screw rod (15) is threadedly connected to the second pulse electric rod (8).

4. A fish intercepting and driving fish system for a tailwater tunnel of a hydropower station according to claim 3, characterized in that: The second pulse electric pole (8) is slidably connected inside the inclined hole of the water guide slope, the inclined groove body of the water guide slope is connected to the control groove (9), and sliding blocks (16) are provided on both sides of the lower end of the second pulse electric pole (8), and the sliding blocks (16) are slidably connected to the inclined groove body of the water guide slope.

5. A fish intercepting and driving fish system for a tailwater tunnel of a hydropower station according to claim 4, characterized in that: A sealing ring (17) is provided between the second pulse electric pole (8) and the upper end of the trough body with an inclined water guide slope.

6. The fish intercepting and driving fish system for the tailwater tunnel of a hydropower station according to claim 1, characterized in that: The width of the fixed beam (5) is less than or equal to the width of the inspection opening (4), and a plurality of first pulse poles (6) are hinged to the fixed beam (5).

7. A fish intercepting and driving fish system for a tailwater tunnel of a hydropower station according to claim 6, characterized in that: A counterweight (7) is provided at the lower end of each of the plurality of first pulse poles (6). The counterweight (7) has a conical structure. A limit groove (18) is provided at the bottom relative to the inspection opening (4) of the tailwater tunnel (2). The counterweight (7) is arranged inside the limit groove (18) after it is lowered.

8. The fish intercepting and driving fish system for the tailwater tunnel of a hydropower station according to claim 6, characterized in that: Limit blocks (501) are also provided on both sides of the fixed beam (5), and the limit blocks (501) are used to limit the swing angle of the second pulse pole (8).

9. The fish intercepting and driving fish system for the tailwater tunnel of a hydropower station according to claim 1, characterized in that: A pulse voltage driver is also provided, and the pulse voltage driver is electrically connected to the first pulse electric pole (6) and the second pulse electric pole (8).

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