106 results about "Fish ladder" patented technology

A Taiji fishway structure includes fishway pool chamber units arranged sequentially along a water flow direction, each fishway pool chamber unit includes an curved side wall, an curved deflector, and a first longitudinal side wall, a fishway vertical partition plate, and a second longitudinal side wall provided on the same side of the fishway. A head end of the curved deflector of the i-th fishway pool chamber unit connects to a head end of the curved side wall in the (i+1)th fishway pool chamber unit, and forms a fish passage vertical slot that matches target fish body size with an end of the fishway vertical partition plate in the (i+1)th fishway pool chamber unit, and water flow of the i-th fishway pool chamber unit is ejected toward the curved side wall in the (i+1)th fishway pool chamber unit through the fish passage vertical slot.

The invention discloses a partition plate type fishway built on a floodplain, and relates to the technical field of fishways, the partition plate type fishway comprises a fishway and a movable cover plate, the fishway is a partition plate vertical seam type fishway, the movable cover plate is arranged at an opening in the upper end of the fishway, and the movable cover plate is detachably connected with the fishway. According to the partition plate type fishway built on the floodplain, fish migration can be achieved for a floodplain type river channel, and silt can be prevented from blocking the fishway when river water overflows the floodplain.

The application discloses a fishway with a movable baffle and belongs to the field of fishway construction in water conservancy and hydropower engineering. The fishway comprises a fixed wing plate, a movable baffle, a pushing rod bearing, a pushing ball head, a hydraulic pushing rod, a pushing rod shaft, a fixed wide baffle and an energy dissipation baffle. The fishway can help fishes with different swimming abilities to pass through a dam and shorten the passing time.

The invention relates to the field of hydropower stations, in particular to a hydropower station reservoir area fishway outlet structure and a fishway fish passing method, the hydropower station reservoir area fishway outlet structure adapts to the scene with the large reservoir area water level change amplitude and is more compact in structure, the hydropower station reservoir area fishway outlet structure comprises a fishway section, a fish lifting machine and a gate, and the position of the upstream of the fishway section is higher than the position of the downstream of the fishway section; the gate and the fish lifting machine are arranged on the upstream of the fishway section and comprise a flat slope section, the flat slope section is arranged between the fishway section and the fish lifting machine, the bottom face of the flat slope section is horizontally arranged, an inlet of the flat slope section is communicated with the fishway section, and a water inlet gate is arranged at an outlet of the flat slope section. The system is particularly suitable for hydropower stations with large reservoir area water level variation amplitude and limited fishway arrangement space.

The invention belongs to the technical field of fishway engineering and hydraulic simulation and calculation, and relates to a method and system for calculating hydraulic parameters of a vertical seam type fishway influenced by downstream water level change, and the method comprises the steps: S1, obtaining fishway design parameters and initial hydraulic parameters; s2, when the downstream water level changes, calculating the changed flow velocity of the first vertical seam, the changed water level of the inlet, the changed water level of the first pool chamber and the changed water depth of the first pool chamber, and taking the first pool chamber as the current pool chamber; s3, calculating the changed flow velocity of the next adjacent vertical seam and the changed water level and water depth of the next adjacent pool chamber based on the changed water level and water depth of the current pool chamber; and S4, taking the next adjacent pool chamber in the S3 as the current pool chamber, returning to the S3, continuously calculating the changed flow velocity of the next adjacent vertical seam and the changed water level and water depth of the next adjacent pool chamber until the calculation is stopped, and determining the influenced vertical seam and pool chamber and the corresponding changed hydraulic parameters. According to the method, the number of the vertical seams, the pool chambers and the hydraulic parameter change condition influenced by the downstream water level change can be determined.

The invention discloses a fishway hydraulic power and fishway structure design method and related equipment, and the method comprises the steps: obtaining swimming capability parameters of each target fish species in a target water area, the swimming capability parameters comprising an induction flow rate, a critical swimming speed and an outbreak swimming speed; selecting the target fingerling with the minimum critical swimming speed as a limited fingerling; according to the critical swimming speed corresponding to the limited fingerling, calculating a first energy consumption rate of swimming of the limited fingerling at the first hydraulic flow speed; according to the first energy consumption rate, hydraulic function partitions and space sequence layout of the fishway are determined; and determining fishway hydraulic parameters according to the induction flow velocity of each target fingerling and the critical swimming speed and the outbreak swimming speed of the limited fingerling. According to the fishway, inclusive passing of the fishway to multiple species can be achieved, the structural design of the fishway can adapt to the natural behavior rhythm of fishes, the overall energy consumption of dam passing of fish schools is remarkably reduced, then the ecological efficiency of the fishway is improved, and the fishway can be widely applied to the technical field of fishway design.

This invention provides a method for fish passage behavior recognition based on a multimodal large model. First, imaging sonar image sequences and underwater optical video sequences of fish passing through fish passages or facilities are simultaneously acquired, and the multimodal data are aligned through time stamp synchronization and spatial calibration. Then, fish target detection, segmentation, and feature extraction are performed on the sonar image sequences and optical video sequences respectively to obtain the fish's spatial location, body length, water depth, motion state, morphological structure, and posture features. The obtained acoustic and optical features are input into a multimodal coding and fusion model based on the Transformer architecture, and a unified fish behavior representation vector is constructed through a cross-modal attention mechanism. During the training phase, model parameters are adjusted through a multi-task learning approach using cross-entropy loss, mean squared error loss, and contrastive learning loss, ultimately achieving fish passage behavior category recognition and prediction of individual and group passage difficulty scores.

The application discloses a non-constant flow water-saving type flipper step type fishway and a fish migration method. A plurality of flippers are arranged in the fishway body along the length direction of the fishway body. Each flipper transversely divides the fishway body, thereby forming a plurality of migration pools surrounded by two adjacent flippers. The elevation of the upper end of each flipper gradually decreases along the water flow direction. All the flippers can connect or disconnect the adjacent migration pools. The first flipper, the second flipper, the third flipper and the like are opened and closed in turn according to the set rhythm until the uppermost flipper. The fish enters the upper migration pool in the opening process of the flipper and migrates step by step, thereby realizing the fish flip. The application basically has no requirement on the swimming ability of the fish. The drop water formed in the opening process of the flipper has an attracting effect on the fish, is very beneficial to the fish migration, and the water flow for realizing the migration is smaller than that of the existing fishway.

The present application provides a kind of fish collection and fish luring system of fish passage, including fish blocking electric fence and fish passage;Fish passage is set in the downstream of dam and is close to the shore side, and the one end of fish passage is provided with water inlet, and the other end of fish passage is provided with water outlet, and water inlet is towards the water outlet of dam;Fish blocking electric fence is fixedly connected in the water outlet side away from the shore and extends along the direction away from water inlet, and fish blocking electric fence is used to form electric field below water surface.Combining fish blocking electric fence electric field drive, fish counter-current upstreaming habit and near-shore swimming law, fish group is accurately guided to enter fish passage, and fish luring effect is strengthened with fish luring lamp, to solve the problem of low efficiency of traditional passive phototaxis fish luring.Collaborate water level sensing device and lifting mechanism, can automatically adjust the height of electric fence according to real-time water level, to ensure that electrode stick is always in the main upstreaming water layer of fish, and electric field fully covers effective water layer, without manual intervention.

The present application belongs to the technical field of hydraulic engineering and environmental protection engineering facilities, and particularly relates to an ecological flow releasing facility with a fishway and a construction method thereof. The present application is directed to the reconstruction and expansion of hydraulic engineering with ecological requirements. The fishway and the ecological flow releasing system adopt a short tunnel around dam scheme, which has little influence on other buildings of the hub. Rock plug is used for water retaining, and the installation of the water retaining gate is completed before the flood season, thereby avoiding the risk of flood control during the construction period due to the increase of the retaining and releasing water buildings caused by the reconstruction and expansion. The overall layout of the fishway engineering and the ecological flow releasing facility is considered, the tunnel section adopts the layout of the fishway on the top and the ecological releasing pipe on the bottom, the tunnel section type is beneficial to the stability of the surrounding rock, the construction difficulty is small, and the excavation and support amount is small. The tunnel section adopts a sunlight fiber optic introduction system for lighting, which can make the fishway tunnel section more close to the natural conditions, and the adverse effects of the fishway tunnel section engineering on fish migration are minimized.

This invention relates to the field of data processing technology, specifically to a method for evaluating the effectiveness of fish passage in an eco-friendly fishway based on multi-factor analysis. The method involves acquiring multi-dimensional data, a multi-factor evaluation calculation model, and engineering parameters of each batch of fish swimming through a test section within each monitoring period. In each period, the theoretical environmental pressure rate is calculated using the model based on water temperature and flow velocity sequences. The total time consumed is compared with a preset baseline time to determine the energy consumption index. Effective swimming weights are determined by combining the deviation of the swimming trajectory time series and engineering parameters, reducing the weight of ineffective time consumption data in the backwater rest area. Multiple indicators from all batches of fish are integrated to determine long-term evaluation deviation indicators, and effective error periods are selected. An environmental parameter constraint space is constructed, and relevant data from each batch of fish within the effective error period are used for traversal optimization to eliminate data contamination in the rest area and improve the model's adaptability and predictive accuracy to different environments and fish states.

This invention belongs to the field of ecological restoration technology in water conservancy engineering, specifically involving a fishway inlet centralized layout and natural fish-guiding structure adapted to large-amplitude water levels. It includes a fishway inlet group centrally arranged along the bank slope of the tailrace channel of a power plant, a vertically slit-type fishway main body, and a water replenishment and control system. The inlet group comprises multiple independent inlets arranged along an elevation gradient. Elevation differences are offset by fishway sections with a reversible structure, ensuring all inlets are centrally located within a certain range in the core fish-gathering area. The water replenishment and control system's flow rate is inversely correlated with the real-time water depth and natural flow rate within the fishway. Combined with the natural flow field of the tailrace channel, a natural fish-guiding path without a cross-river electric guide is constructed. This invention solves the problems of dispersed inlets, ecological stress in fish-guiding methods, and disconnected water replenishment and control logic in traditional designs. It achieves precise matching between the inlets and the natural migration paths of fish, significantly improving fish passage efficiency.

The invention provides a fishway and dam integrated device integrating multi-depth entrances and exits and multi-direction water replenishing and fish luring and an operation method, and belongs to the technical field of fishways. The device comprises a gravity dam section, a stepped fishway integrated in the gravity dam section and a water replenishing pipeline pre-buried in a wall body of the gravity dam section; the upstream side and the downstream side of the gravity dam section are provided with multi-elevation entrances and exits and matched gates respectively, a fishway bottom plate and partition plates of the stepped fishway are distributed in a stepped mode, and the water supplementing pipeline is provided with multi-direction water supplementing sprayers around the fishway entrance. According to the operation method, through cooperative opening and closing of multi-depth inlets and outlets, multi-direction and multi-flow-speed fine regulation and control of water supplementing nozzles, stepped fishway energy dissipation and flow aiding and dam water retaining mode switching, fishway and dam structure function integration is achieved. Extra land acquisition and pouring are not needed, the engineering cost and construction difficulty are reduced, the method can adapt to dynamic changes of the water level of the reservoir, migration depth preferences of different fishes are considered, the fish luring and passing efficiency is improved, and the fish passing window period is prolonged.

The application discloses a long-distance vertical-seam type fishway structure and an operation method thereof and belongs to the technical field of water conservancy and hydropower ecological protection. The structure comprises a dam and a vertical-seam type fishway. A fish collecting box lifting conveyor is arranged in one fishway side wall of a straight line section of the vertical-seam type fishway. A fish collecting box conveying mechanism for conveying fish collecting boxes in a long partition plate of the straight line section of the vertical-seam type fishway to the fish collecting box lifting conveyor is arranged in the long partition plate and the one fishway side wall. A fish collecting box returning mechanism for returning empty fish collecting boxes falling from the fish collecting box lifting conveyor to the long partition plate is arranged in the long partition plate and the one fishway side wall. Fishes can be lifted from a downstream section of the vertical-seam type fishway to an upstream section of the vertical-seam type fishway. The fishes in a fishway pool chamber can reach a dam upstream reservoir without experiencing long-distance internal migration, and the fish passing effect and efficiency of the vertical-seam type fishway are improved.

The invention relates to the technical field of fishways, in particular to a jungle pile abrupt slope fishway and a design method thereof. According to the method, fluid mechanics numerical simulation is carried out on the second design model, the distance between the longitudinal adjacent vortex piles capable of forming the continuous vortex street is obtained, the distance between the transverse adjacent vortex piles is determined according to the maximum swing amplitude of the target fish and the continuous vortex street, and therefore the most suitable jungle pile abrupt slope fishway can be designed according to the target fish. The continuous vortex street formed by the vortex piles not only can form boosting force for pushing the target fish to swim upwards on the two sides of the target fish, but also forms a fish passing channel with slow water flow on the lower layer of the jungle pile abrupt slope fishway under the combined action of the vortex piles and the bottom partition plate; under the dual influence, cyprinid fishes with relatively weak swimming ability can smoothly trace upwards through the jungle pile abrupt slope fishway.

The invention discloses a floating fishway outlet structure and method adaptive to reservoir area water level amplitude, the fishway outlet structure comprises a fishway outlet, an adjusting unit is arranged in the fishway outlet, a floating plate is hinged to the adjusting unit, the floating plate is arranged on the outer side of the outlet end of the fishway outlet, the adjusting unit is slidably connected with the fishway outlet, and the adjusting unit is connected with the fishway outlet. A telescopic rod is arranged at the bottom of the adjusting unit, and the bottom of the telescopic rod is connected with the fishway outlet. The first-stage variable-gradient area is arranged at the outlet section of the fishway, the gradient is gradually reduced in the downstream direction, the downstream is connected with the water level flat slope pool, the whole fishway gradient is smoothly transited to the downstream fixed design gradient from the variable-gradient area, and therefore on the premise that the fish passing hydraulic condition is met, the fish passing efficiency is improved. And the application range of a single fishway outlet to the reservoir area water level amplitude variation is expanded.

The application discloses a fish passing system and method of dynamic and static cooperation, and belongs to the technical field of ecological protection of water conservancy and hydropower. The system comprises a dam, a short fishway, a fish collecting and lifting mechanism and a water supplement assembly. The short fishway is arranged at the downstream of the dam, and the inlet of the short fishway extends into the water body of the downstream river channel of the dam. The fish collecting and lifting mechanism is arranged on a carrying mechanism and is connected with the outlet of the short fishway. One end of the water supplement assembly extends into the water body of the downstream river channel of the dam, and the other end extends to the outlet of the short fishway or into the fish collecting and lifting mechanism. The fish passing system can be used as a long-term fish passing facility during the operation period of the dam. Compared with the fish passing system in the prior art, only the short fishway needs to be constructed on site, the construction engineering quantity is small, the construction difficulty is low, and the fish passing system is basically not limited by the topography and geology of the dam.

The utility model relates to the technical field of salmon cultivation, in particular to a salmon counting and weighing device which comprises a storage pool, a fishway is fixedly connected to one side of the storage pool, the bottom of the other end of the fishway is fixedly connected with a weighing pool, and a workbench is fixedly connected to the bottom of the storage pool. A fish driving device is fixedly connected to the side, opposite to the fishway, of the storage pool, a first sensor and a second sensor are fixedly connected to the fishway in a spaced mode, a support is arranged on one side of the storage pool, a first telescopic cylinder is fixedly connected to the lower portion of the support, and a first baffle is fixedly connected to the output end of the first telescopic cylinder; a first telescopic cylinder is arranged in the weighing pool, a counter is installed on the first telescopic cylinder, a fish cage is detachably connected in the weighing pool, a second telescopic cylinder is arranged on one side of the weighing pool, a supporting plate is fixedly connected to the output end of the second telescopic cylinder, and a crane scale is fixedly connected to the lower portion of the supporting plate. The salmon counting device can reduce counting mistakes and omissions and improve the actual fitting degree of average salmon quality results.

This utility model discloses a fishway monitoring device with adaptive flow velocity adjustment, including a channel shell with an inlet and an outlet at its two ends. Cameras are installed on the top and sides of the channel shell. A transparent side plate is fixed inside the channel shell on one side. A lifting box is installed on the back of the outlet end, and an impeller is installed inside the lifting box. A blocking net is fixed at the inlet of the lifting box, and an acceleration outlet is opened on the bottom of the outlet end. A sealing plate is installed at the location of the acceleration outlet. Lifting components are installed on both sides of the channel shell. When the water flow velocity is abnormal, the lifting box quickly sinks through the lifting components, so that the high-speed water flow can only pass through the inclined acceleration outlet at the bottom. At this time, the impeller encapsulated in the lifting box can rotate forward to accelerate or reverse to decelerate as needed. When rotating forward, the impeller pushes the water flow axially towards the acceleration outlet, increasing the flow velocity and solving the problem of fish clustering. When rotating in reverse, a reverse vortex is formed to consume kinetic energy, and the flow velocity is reduced to avoid the problem of image blurring.

The application discloses a reconstruction method of a vertical slot fishway into a movable baffle fishway, which comprises the following steps: a) extending the fish inlet downstream; b) reconstructing the fish outlet into a transversely opening gate; and c) adding an automatically controlled energy dissipation baffle between pool rooms; when the defects of the original fishway are caused by the change of the upstream and downstream water levels, the steps of a) and b) need to be performed; when the defects of the original fishway are caused by the emergence of new low-swimming-speed fish species, the step of c) is performed; and when the original fishway has both of the above problems, the steps of a), b) and c) are simultaneously performed. The application has the advantages that the reconstruction method of the vertical slot fishway is provided; the reconstruction design method and the new body type of the fishway outlet; the reconstruction method of the fishway inlet; and the above method and body type have important effects on the improvement of the fish passing efficiency.

The invention discloses an ecological fishway design method and related equipment, and belongs to the technical field of fishway design, the method comprises the following steps: determining an ecological fishway fish passing object to obtain to-be-tested fish; testing the swimming ability of the to-be-tested fish so as to determine the swimming ability data index of the to-be-tested fish; and determining a design result of the ecological fishway based on the swimming ability data index of the to-be-tested fish. According to the method, the fish swimming physiological test and data analysis are carried out on the fish passing object, the quantitative correlation between the swimming capacity and the fishway hydraulic parameters is established through organic coupling of the theoretical model, scientific data support can be provided for fishway design, and therefore the adaptability and the fish passing effect of the ecological fishway are improved.

This invention discloses a fish passage device suitable for shallow backwater river sections, comprising a hydropower station, a fishway, and a river channel. The hydropower station includes a main section, with a downstream backwater level downstream of the station. The fishway is located on one side of the hydropower station and includes a fishway inlet, a fishway body, and a fishway outlet. The river channel is located between the fishway inlet and the downstream backwater level, and includes a first channel and a second channel. The first channel is located on the side where the main section is located, and a flow diversion guide wall is located upstream of the second channel. This fish passage device for shallow backwater river sections can seamlessly connect and transition between the hydropower station and the downstream backwater level, forming a suitable swimming zone with a flow velocity that meets the requirements of fish swimming in shallow backwater river sections. It can meet the upstream swimming needs of fish even when the hydropower station is generating power or shut down, ensuring effective fish passage and protecting the ecological environment.

The application relates to the technical field of fish protection, in particular to a biomimetic fishway multi-parameter optimization method considering fishway environment and water quality requirements, which comprises the following steps: obtaining the dissolved oxygen concentration in the fishway water body. According to the difference between the dissolved oxygen concentration and the preset reference oxygen demand, the guide water temperature for guiding fish to bypass the high flow speed area is determined. Based on a global optimization model of graph theory, the positions of multiple to-be-guided fish group clusters and the positions of multiple adjustable guide nodes are processed to determine the optimal matching relationship between the to-be-guided fish group clusters and the adjustable guide nodes. According to the optimal matching relationship, the corresponding adjustable guide node is controlled to output the guide fluid with the guide water temperature. The application provides a method for coordinating the conflict between the oxygenation operation and the fish migration.

The invention relates to the technical field of fish migration dam-passing facilities, in particular to a double-channel type ascending fishway which comprises a vertically-arranged supporting column, and a fishway body is fixedly connected to the outer side of the supporting column in a spiral surrounding mode. The top end of the fishway is connected with a buffer pool which is communicated with an upstream river channel, and the bottom end of the fishway is communicated with a downstream river channel; a partition plate is arranged on the inner side of the fishway in the length direction and divides the fishway into an inner part and an outer part, the inner side is a high-speed fishway, and the outer side is a low-speed fishway. A plurality of fish passing openings are formed in the partition plate at equal intervals, water guide plates extending into the high-speed fishway are arranged at the fish passing openings, and a plurality of water baffles are arranged in the low-speed fishway in a staggered mode; the double-channel type fishway is arranged according to the water flow velocity difference between the inner side and the outer side of the spiral fishway, the water flow velocities in the two fishways are different, and therefore the fishway can be suitable for more complex river ecology, and a more suitable upward dam passing channel is provided for various fish schools with different habits.

The fishway water supplementing and fish luring device comprises a fishway body, a main channel is arranged in the middle of the fishway body, staggered baffles are arranged in the main channel, water flow energy can be reduced, a plurality of fish collecting lamps are further installed on the inner side of the main channel, and fishes can be induced to pass through the fishway through the fish collecting lamps. The side edge of the main channel is communicated with a plurality of branch channels, a water return bend is formed between an inlet and an outlet of each branch channel, a sliding groove is formed below the inlet of each branch channel, each branch channel is slidably connected with a transverse plate through the corresponding sliding groove, and a blocking plate is fixed to the top of each transverse plate. When the water flow of the river channel becomes small, the transverse plate and the barrier plate rise through the lifting mechanism to close the branch channel; the technical problem that the water flow velocity of an existing fishway can only follow the water flow velocity of a river channel and cannot be adaptively adjusted is solved.

The invention provides a daily regulation reservoir large-water-level variable-amplitude fishway single-outlet arrangement structure which comprises a vertical seam type fishway and a rest regulation pool, the vertical seam type fishway is provided with a fishway outlet section connected with an upstream reservoir, the fishway outlet section is provided with a single outlet, and the outlet is provided with a water quantity regulation overflow device. The water quantity adjusting overflow device comprises an overflow opening which is formed in the top of the fishway outlet section and is adjustable in opening degree so as to control the outflow flow of downstream fishway pond chambers under different reservoir water levels, and the rest adjusting pond is embedded in the vertical seam type fishway and is directly connected to the downstream of the fishway outlet section. When the top of the fishway outlet section forms a large flow speed due to the high water level of the reservoir, a rest space is provided for migratory fishes. The outlet structure is simplified fundamentally, the complex project that a plurality of fixed-elevation outlets are arranged due to great change of the water level of the reservoir is avoided, and the project amount and construction cost of the fishway outlet section and accessory structures of the fishway outlet section are reduced.

The application discloses a fishway fish observation method based on mixed reality and image recognition, carries out fish species and quantity identification training on fish images based on a YOLOv3 algorithm, and constructs a fish species and quantity identification model; a three-dimensional modeling software is used to construct a fishway three-dimensional model, and a conversion relationship between the fishway three-dimensional model coordinates and fishway coordinates is established; the fishway three-dimensional model is imported into three-dimensional engine software to write a mixed reality application, and is imported into a mixed reality device; underwater cameras are installed at certain intervals in the fishway to collect fishway images; fish species, quantity, migration direction in the fishway images are identified through the fish species and quantity identification model, and the positions of fishes between adjacent underwater cameras are estimated; the positions are sent to the mixed reality device; and the fishway fish situation is presented in real time through the mixed reality device, so that fishway fish observation research is achieved.

This invention provides a flow diversion system adaptable to variations in the inlet water level of a fishway, comprising a fishway, a water level and velocity monitoring device, a diversion inlet device, branch diversion pipes and valves, a main diversion pipe and a main valve. The diversion inlet device is located at the bottom of the pool chamber or resting area downstream of the fishway and is connected to the branch diversion pipes. Each branch diversion pipe has its flow rate controlled by a valve at its end. All branch diversion pipes converge into a main diversion pipe extending along the sidewall of the fishway, with a main valve at its end. The water level and velocity monitoring device is arranged in the pool chamber to control the opening and closing of the valves to regulate the diversion flow rate. The fishway includes a fishway outlet, a fishway inlet, a pool chamber, and a resting area. The pool chamber is formed by staggered wide and narrow partitions, with vertical slits between the wide and narrow partitions serving as an upstream flow channel for fish. This invention, through flow diversion along the fishway, reduces the water level difference in the inlet section of the pool chamber and the flow velocity in the vertical slits, thereby improving the adaptability of the fishway inlet water level to variations.