60results about How to "Improve fish passing efficiency" patented technology

The invention relates to a method and system for luring fishes with flow jetting. The system comprises a fish blocking flow jetting pipe arranged on the up stream of a fishway inlet. A plurality of fish blocking flow jetting holes are formed in a straight-line mode in the length direction of the fish blocking flow jetting pipe, and alpha fish blocking angles are formed between the outlet flow jetting lines of the fish blocking flow jetting holes and a riverway. A plurality of fish luring flow jetting pipes are arranged on the down stream of the fishway inlet along the riverway, a plurality of fish luring flow jetting holes are formed in the fish luring flow jetting pipes in a straight-line mode in the length directions of the fish luring flow jetting pipes, and gamma fish luring angles are formed between the outlet flow jetting lines of the fish luring flow jetting holes and the riverway. According to the method and system, fish blocking flow jetting and fish luring flow jetting are generated through flowing of water flow, and the fishes are prevented from going over the fishway inlet through fish blocking flow jetting, guided by fish luring flow jetting to enter a fishway and prevented from losing the direction. Compared with a traditional water replenishment fish luring mode, water consumption of fish blocking flow jetting and fish luring flow jetting is remarkably reduced, a large number of water conservancy resources are saved, and the method and system are simple in project construction, convenient to operate and suitable for various water conservancy projects.

The invention relates to a rectification pool type fishway and a flow state control method. The rectification pool type fishway comprises a plurality of continuous chambers which are raised in a ladder mode, and a rectification board provided with a plurality of flow holes arranged above and below and left and right is arranged between every two adjacent chambers. The fishway suitable for fishes having small sizes and poor swimming capability is a pool type fishway making use of the hydraulics rectification and energy dissipation principle of the rectification boards, the rectification boards can play an obvious role in energy dissipation between the chambers, the definite water flow direction can be formed while energy dissipation is carried out, and therefore the fishes can go upstream in the definite direction when swimming in the fishway and cannot get lost or be trapped in the fishway. The fishway reduces obstruction influence of hydraulic engineering construction on the fishes, fish passing efficiency of the fishway is improved, and the river ecological environment is protected or restored.

The invention discloses a trench type fish collection front room suitable for different water depth variation amplitudes of a high-head dam and belongs to the field of water conservancy facilities. The trench type fish collection front room comprises a fish collecting and luring system and a water supply system, wherein the fish collecting and luring system mainly comprises a long bottom plate anda sloped bottom plate, a fish-collecting transition section, two fish-collecting retaining walls, two energy dissipation gratings, a break joint type control gate, a fish collection tank and a fish collection inlet; the water supply system comprises a power station tail water outlet counter-slope, a water supply open channel section, a water supply closed conduit section, a water supply outlet section and a fish collection outlet. During the operation of the trench type fish collection front room disclosed by the invention, power station tail water flow serves as fish-luring water flow and water supply flow, the flow and the flow velocity of the fish collection front room are controlled by adjusting relative positions of two rows of vertically arranged cross joints of a cross joint type control gate, fishes are lured to enter the fish collection tank of the fish collection front room, the fish collecting and luring effects are obvious and high-efficiency, and the fish collection frontroom has the advantage of being adaptive to great water level variation amplitude and is suitable for popularization and application in water conservancy projects.

The invention discloses a device and method for guiding fishes to sail upstream. The device comprises a water power device and a plurality of inverted T-shaped water supply units. The inverted T-shaped water supply units are composed of main water supply pipes and branch pipes. A water pump is connected with the inverted T-shaped water supply units, each branch pipe is provided with a plurality of spouts, and each spout is provided with a nozzle. Each inverted T-shaped water supply units contains more than two nozzles, radiation rays led out through the nozzles in each unit are approximately intersected at one point, connecting lines of the point with any two nozzles form acute triangles with connection lines between the two nozzles, submerged jet streams of the nozzles of any unit are superimposed to form a superimposed jet stream, and the superimposed jet streams of the unit nozzles are superimposed end to end for form a jet stream flow channel. The problems that the fishes in favor of sailing upstream in flowing water have no attracting stream flow to guide to sail upstream in static or low velocity areas in a high dam reservoir are solved; multiple sprout jet streams of a pipe network are adopted to guide the fishes to sail upstream, so that the fishes having spawning behavior by sailing upstream are prevented from failing to pass the wide ranges of static or low velocity areas due to changes in hydrological conditions in a water conservancy project.

The invention relates to a tidal river reach fishway inlet design method and a fishway inlet. The method comprises the steps of: typical tide process selection; tide level calculation; fishway inlet section hydraulic characteristic calculation; fishway inlet arrangement and water level design; and fishway inlet parameter determination. The method builds a flux and reflux model of a tidal river reach by tide current principles and tidal river reach hydraulic characteristics, calculates various types of tidal ranges and the tide level change conditions through the model, calculates and determines optimal fishway inlet positions of various tide levels to adapt to the flows, the flowing directions and the water level changes of different tide currents through the fishway inlet section hydraulic characteristics, improves the fishway fish passing efficiency, reduces the influence on fish stop by the hydraulic engineering construction, and achieves important significance on protection or repair of the river ecological environment.

Provided is a shoreside seamless fish-driving device used for a fish-guiding system. The shoreside seamless fish-driving device comprises an air pump arranged shoreside and flash lamps matching the air pump. An air outlet pipe having one enclosed end is arranged at the bottom of a riverway and located ahead of the position where a fish-guiding net is connected with the shoreside. The other end of the air outlet pipe is communicated with the air pump via an air-guiding pipe installed on a fixing rack. At least one flash lamp installed on a lamp rack is arranged into the riverway at the downstream position of the air outlet pipe. The air outlet pipe is composed of a PVC pipe having uniformly-distributed small holes on the pipe wall and a microporous sponge sleeve wrapped outside of the PVC pipe. The shoreside seamless fish-driving device used for the fish-guiding system has following beneficial effects: the problem that a physical guide fish gate cannot be closely connected to the shoreside is overcome; by matching the physical guide fish gate with fish trapping and driving technology, shoreside seamless connection of the fish-guiding system is realized and the middle of the riverway is matched with a non-physical fish-guiding system; and fish-guiding work and ship-passing operation are taken into consideration.

The invention provides a fish passing system and method free of water resource losses and free water surfaces. The fish passing system is composed of a dam, a fish outlet tunnel, a fish inlet tunnel, a fish collection chamber, a fish outlet gate, a fish inlet gate, a downstream river channel, a sound making unit, a light-emitting unit, a power supply, a material injection machine, a material injection pipe, a fish exploration radar and a master control system. Compared with an existing fish way design method, the fish passing system has the remarkable differences that because the fish passing system is provided with fish passing tunnels and the fish collection chamber which have pressure and are free of free water surfaces, fish way establishment and maintenance expenses are remarkably reduced, project construction lands are greatly saved, almost no water resources are consumed by fish passing, and the fish passing efficiency is improved. A designed fish way can be used for temporary food discharge as well.

The invention relates to the technical field of fish passing facilities of gates and dams of key water conservancy and hydropower control projects, in particular to a communicating type still water fish way. The communicating type still water fish way comprises an upstream outlet section, an upstream and downstream water body communicating section, a migration fish school waiting section and a downstream inlet section, wherein the upstream outlet section, the upstream and downstream water body communicating section, the migration fish school waiting section and the downstream inlet section are sequentially connected from the upstream side to the downstream side. An upstream outlet section bulkhead gate is arranged between the upstream outlet section and the upstream and downstream water body communicating section. A waiting section service gate is arranged between the upstream and downstream water body communicating section and the migration fish school waiting section. A downstream inlet section service gate is arranged between the migration fish school waiting section and the downstream inlet section. According to the communicating type still water fish way, the fish way is divided into multiple different functional sections, management is convenient, and the fish passing efficiency is high; the fish way is simple in design, flexible in arrangement, convenient and rapid to construct, low in manufacturing cost and good in application prospect, and especially for a built project without a fish way, the communicating type still water fish way can be conveniently arranged.

The invention relates to a water-supplementing fishway inlet device with an ecological gate, and belongs to the field of ecological environments for water conservancy projects. The water-supplementing fishway inlet device with the ecological gate is composed of the ecological gate, two water-supplementing port retaining walls, an energy dissipation grating, three fishway inlet sidewalls, two control gates, two fishway inlets, a force dissipation pool, a force dissipation ridge, a gate water-supplementing port, a water outlet port, two fish-collecting retaining walls, a broken line retaining wall and the like. During running of the device disclosed by the invention, a discharged water flow of the ecological gate enters a downstream position through the force dissipation pool, the gate water-supplementing port and the energy dissipation grating, and is converged with a water flow at the water outlet port to form a fish-luring water flow for luring fishes to enter a fishway; and a downstream main flow of the ecological gate is away from a fish-luring channel under the action of the broken line retaining wall, so that conditions in the fish-luring channel meet the upstream sailing of the fishes. The device disclosed by the invention has the advantage of a large adaptation range of water level changes, and moreover, water consumption is reduced, and lots of water resources are saved; and water-supplementing, fish-luring and fish-passing facilities are integrated, thus the fish-passing efficiency is greatly improved.

The invention discloses an inducing and driving integrated type dam fish passing device and a using method thereof, and belong to the field of water conservancy and hydropower engineering and ecological environmental protection engineering. The device comprises a valve a, a valve b, a valve c, a water supply pipeline, a pressure reduction annular pipe, an induction pipeline, a comprehensive pipeline, a screw, a screw support, a driving disc, an end plate and a screw driving device, one end of the comprehensive pipeline is arranged on the upstream of a dam, the other end of the comprehensive pipeline is arranged at the downstream of the dam, the water supply pipeline is arranged on the upstream of the dam, and the induction pipeline is arranged on the downstream of the dam. According to thedevice and the method, by utilizing the habit of the fish school for counter-current migration and combining the actual engineering characteristics of water retaining buildings such as the dam, the pressure water flow in the upstream of the dam is subjected to self-flowing pressure reduction and then flows into the downstream river channel of the dam through the pressure reduction annular pipe, and the fish school for counter-current migration in the downstream is induced and driven to the upstream through the screw driving device; and the remarkable advantages that the occupied area is small, the investment is saved, the effect is fast, the efficiency is high, the water utilization rate is high, installation, operation, maintenance and overhauling are convenient and the like are achieved.

The inventiondiscloses a self-adaptive sound wave fish-luring-and-herding dual-purpose underwater vehicle. The underwater vehicle comprises a front portion, a middle portion and a rear portion. A steering engine is arranged inside the front portion and connected with a water absorbing rudder, and the heading direction of the underwater vehicle is changed by changing the rudder angle of the underwater vehicle; a motor A is arranged inside the rear portion and connected with a propeller located at the tail portion of the underwater vehicle through a coupler and a sleeve, a partition plate is arranged between the front portion and the middle portion as well as between the middle portion and the rear portion, and the front portion is connected with the rear portion in a threaded mode; and a signal emitting control system, a battery, a water tank, a gear and a motor B are arranged in the middle of the underwater vehicle from top to bottom. A sound wave emitting device and the underwater vehicle are combined, a sound source travels in an automatic/remote control mode along with swimming of fish schools, the frequency can be changed at any time according to the luring and herding effect, and the optimal effect is achieved. A manual or automatic system is not needed for real-time rigor control, the operating difficulty in fish luring and herding is lowered, and a method for protecting fish ecology is achieved.

The invention relates to a spoiler pipeline type fish way and a design method. The spoiler pipeline type fish way comprises a tubular body connected with the upstream and downstream of hydraulic engineering, wherein spoilers are uniformly arranged along the interior of the tubular body. The fish way tubular body is a tube which can be buried in the ground or fixed in the air. The tubes can be even vertically arranged, and the characteristic cannot be realized by other types of fish ways. The tubes can be formed by prefabrication before installation. The prefabrication cost is low, and field installation is very simple, so that the construction cost of the fish way is much lower than that of common fish ways. The fish way reduces the blocking effect on fishes by hydraulic engineering, reduces the construction cost, improves the fish pass efficiency, and has significance on protection and restoration of river ecological environment.

The invention discloses a zoological-imitated fishway with a natural cobble partition plate. The zoological-imitated fishway comprises fishway partition plates and a fishway aqueduct body, wherein vertical side walls are arranged on the left sides of the fishway partition plates; inclined side walls are arranged on the right sides of the fishway partition plates; the fishway partition plates comprise cobble partition walls, long partition plates, short partition plates and longitudinal pore plates; the cobble partition walls are connected with one side of the inclined side wall; S-shaped fishthrough holes are formed in different areas at different heights of the cobble partition walls; the long partition plates are connected with the other ends of the cobble partition plates; the longitudinal pore plates are connected with one sides of the long partition plates; the long partition plates and the short partition plates are distributed in a staggered manner to form fish through verticalseams. By adopting the zoological-imitated fishway, harmonies of through fishes and fishway water flows are improved, the fish through efficiency is improved, and a nature-imitated effect is achieved; in addition, due to adoption of the 'S'-shaped fish through holes, a flow field structure similar to a through fish target swimming track line is constructed, biological characteristics of target fishes are met, and furthermore, the purpose that the flow speed of a chamber is reduced and upstream sailing of fish targets is met are achieved.

The invention relates to the technical field of fish way engineering in the water and electricity industry, and particularly relates to a natural vertical seam type fish way structure with the adjustable flow speed. The natural vertical seam type fish way structure comprises a fish way bottom plate, wherein fish way side walls are vertically arranged on the two sides of the top of the fish way bottom plate, the fish way bottom plate and the fish way side walls are of an integrally-formed structure, and a plurality of speed adjusting units are arranged between the two fish way side walls at equal intervals. According to the natural vertical seam type fish way structure, a large number of natural building materials such as sandy gravel are used, the flow speed of the fish way water flow is adjusted, the characteristics of a natural river channel are simulated to the maximum extent, a good fish passing environment and the most suitable water flow condition are created for fish passing objects, the advantages of being high in fish passing efficiency and environmentally friendly are achieved, and the defects in the prior art can be well overcome.

The invention discloses an intelligent rotary fish expelling device for a fish way and a method for expelling fish by using the device. The fish expelling device comprises a walking mechanism, a fishblocking electric fence and a fish blocking fence rotating mechanism, wherein the walking mechanism comprises a walking trolley and walking tracks symmetrically distributed on the top surfaces of twoside walls of the fish way; the starting ends of the walking tracks are arranged at positions close to an overhauling folding gate, and the tail ends of the walking tracks extend to a fish collectingcompartment lifting well along the fish way; and the fish blocking electric fence is vertically hung in the fish way through the fish blocking fence rotating mechanism. Before fish expelling, the fishblocking electric fence is parallel to the water flow direction, and downstream fish enters the fish way; and when the fish in the fish way reaches the transportation volume of the fish collecting compartment lifting well, the fish blocking electric fence rotates by 90 degrees to block the inlet of the fish way, and the walking trolley drives the fish blocking electric fence to move and expel thefish in the fish way into a fish collecting compartment. According to the device and the method, the fish is automatically expelled, the fish passing efficiency of the fish way is greatly improved, manual intervention and influence on ecological environmental protection are reduced, and the safety is high.