Fish nest structure capable of adapting to spawning of multi-habit fishes

Abstract

The fish nest structure comprises a water surface buoyancy platform and an underwater matrix platform hoisted below the water surface buoyancy platform through a plurality of hoisting rods, a soft medium artificial fish nest is arranged on the water surface buoyancy platform, and a hard medium artificial fish nest comprising a gravel layer is arranged at the top of the underwater matrix platform. The water surface buoyancy platform is connected with a torrent simulation mechanism located at one end of the underwater substrate platform, and a photovoltaic power supply system comprising a plurality of photovoltaic panels is arranged at the top of the water surface buoyancy platform. Water flow is driven by the torrent simulation mechanism to flow through the gravel layer, so that the natural shallow water torrent gravel spawning site suitable for spawning of torrent fishes is simulated; and the plurality of photovoltaic panels are arranged above the soft medium artificial fish nest, so that the soft medium artificial fish nest is shaded and protected against natural enemies of birds.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of artificial fish nest, and particularly relates to a fish nest structure suitable for spawning of fish with multiple habits. BACKGROUND

[0002] After the formation of a reservoir area of a hydropower station, a flowing water habitat is converted into a still water habitat, and a large number of gravel shoals are submerged in deep water, which leads to a significant reduction in the natural spawning ground area of fish of the Schizothoracinae subfamily and fish of the Gymnocypris genus, and has a great influence on their natural breeding activities. Due to the gentle flow and deep water after the formation of the reservoir area, it is difficult to construct a shallow water torrent gravel spawning ground suitable for the breeding activities of the above-mentioned fish through bottom paving and other methods.

[0003] In addition, after the formation of the reservoir area of the hydropower station, aquatic plants are reduced, which damages the spawning ground of fish that lay adhesive eggs. Moreover, the function of the existing soft medium artificial fish nest is usually to set natural plants or artificial plants on a floating structure for the attachment of eggs, so that the soft medium artificial fish nest is exposed. On the one hand, long-time direct sunlight will lead to an increase in the water temperature near the soft medium artificial fish nest, and the fluctuation of the water temperature may cause unstable attachment of fish eggs. On the other hand, the exposed soft medium artificial fish nest will make the parent fish and fish eggs easy to be captured by avian predators. SUMMARY

[0004] The technical solution of the present application provides a solution significantly different from the prior art to solve the technical problem that the prior art solution is too single, and mainly provides a fish nest structure suitable for spawning of fish with multiple habits to solve the technical problems that it is difficult to construct a shallow water torrent gravel spawning ground through bottom paving and the temperature of the soft medium artificial fish nest is stable and easy to fluctuate and difficult to defend against avian predators in the background art.

[0005] The technical solution adopted by the present application to solve the above technical problems is as follows: A fish nest structure suitable for spawning of fish with multiple habits, comprising a water surface buoyancy platform and an underwater substrate platform suspended below the water surface buoyancy platform through a plurality of hoisting rods; A soft medium artificial fish nest is arranged on the water surface buoyancy platform, and a hard medium artificial fish nest comprising a gravel layer is arranged on the top of the underwater substrate platform; A torrent simulation mechanism is connected to one end of the underwater substrate platform, a photovoltaic power supply system comprising a plurality of photovoltaic panels is arranged on the top of the water surface buoyancy platform, the photovoltaic power supply system is electrically connected to the torrent simulation mechanism, and the soft medium artificial fish nest is located below the plurality of photovoltaic panels; The torrent simulation mechanism drives the water flow through the gravel layer to simulate a natural shallow water torrent gravel spawning ground and promote the flow of water near the soft medium artificial fish nest.

[0006] Further, the hard medium artificial fish nest further comprises side retaining sheets surrounding the gravel layer, and the distance between the top of the side retaining sheet and the top of the underwater substrate platform is not less than the thickness of the gravel layer.

[0007] Further, the gravel layer comprises, from top to bottom, a fish egg attachment layer, a buffer layer and a microorganism attachment layer, the fish egg attachment layer has a thickness of 3-5 cm and is paved with granite gravel, the buffer layer has a thickness of 3-4 cm and is paved with limestone gravel, and the microorganism attachment layer has a thickness of 3-4 cm and is paved with porous volcanic gravel.

[0008] Further, the bottom of the underwater substrate platform is provided with a bundle of palm fibers, and the arrangement density of the palm fiber bundle is 5 bundles per square meter.

[0009] Further, the torrent simulation mechanism comprises a submerged flow pusher and a flow guide, the submerged flow pusher is connected with the water surface buoyancy platform, and the lower end of the flow guide extends to both sides and is connected with the hoisting rods on both sides. The inner part of the upper end of the flow guide is provided with a flow guide channel, the submerged flow pusher is vertically arranged at the top end of the flow guide, and the blades of the submerged flow pusher are located in the flow guide channel. The inner part of the lower end of the flow guide is provided with an annular channel in communication with the flow guide channel, and the front end of the flow guide close to the underwater substrate platform is provided with an annular jet hole in communication with the annular channel. Both sides of the inner part of the flow guide channel are provided with a plurality of arc-shaped flow guide plates, the flow guide plates on both sides are symmetric about the center line of the flow guide channel, and the flow guide plates are arranged to be inclined downward away from the center line of the flow guide channel. The lower end of the flow guide is provided with a flow increasing hole penetrating through the front and back of the flow guide, the annular channel and the annular jet hole are in a head-to-tail structure, and the annular channel and the annular jet hole are arranged around the flow increasing hole.

[0010] Further, the side wall of the flow guide is provided with filter holes in communication with the flow guide channel, the upper and lower parts of the blades of the submerged flow pusher are provided with filter holes, and the blades of the submerged flow pusher are located in the near-surface water area close to the water surface.

[0011] Further, the same side of the water surface buoyancy platform and the underwater substrate platform is provided with a positioning ring, and a positioning pile with a fixed lower end is rotatably inserted into the positioning ring. A plurality of rudder plate shafts are vertically arranged in the flow increasing hole, a rudder plate is rotatably arranged on the rudder plate shaft, the rudder plate is connected with a steering driving mechanism, a control module is arranged on the water surface buoyancy platform, and the steering driving mechanism is electrically connected with the photovoltaic power supply system through the control module. The control module controls the steering driving mechanism to drive the rudder plate to rotate around the rudder plate shaft according to the sunlight direction, and the water flow at the flow increasing hole impacts the rudder plate, so that the water surface buoyancy platform and the underwater substrate platform are steered around the positioning pile.

[0012] Further, the steering driving mechanism comprises a linkage rod and an underwater electric push rod electrically connected with the control module, the underwater electric push rod is arranged on the flow guide and above the flow increasing hole; One end of the rudder plate is connected with the rudder plate shaft, and the top of the other end is provided with an operating rod, a strip-shaped hole is arranged on the linkage rod along the length direction of the rudder plate, and the operating rod is inserted into the strip-shaped hole and can rotate and slide in the strip-shaped hole; Both ends of the flow guide located at the flow increasing hole are provided with a guide sleeve for sliding insertion of the linkage rod, and the linkage rod is connected with the underwater electric push rod above through a transmission rod.

[0013] Further, the water surface buoyancy platform comprises a floating frame and a rectangular frame, a plurality of floating frames are sequentially connected to form a floating frame connected in a head-to-tail mode, and the rectangular frame is arranged at the top of the floating frame. The rectangular frame has a plurality of holes, the soft medium artificial fish nest is arranged at the hole of the rectangular frame, and a plurality of photovoltaic panels are arranged on the rectangular frame through a support.

[0014] Further, one end of the rectangular frame is provided with a flow pusher frame, and the flow pusher frame is connected with a submerged flow pusher at one end extending to the outside of the floating frame. The outside of the floating frame is provided with a plurality of floating boxes for accommodating the remaining components of the photovoltaic power supply system, and the floating boxes are connected with the rectangular frame through floating box connecting rods.

[0015] Compared with the prior art, the beneficial effects of the present application are: 1. The present application sets up a torrent simulation mechanism at one end of the underwater substrate platform, and sets up a photovoltaic power supply system with a plurality of photovoltaic panels on the water surface buoyancy platform to supply power for the torrent simulation mechanism, the water flow generated by the torrent simulation mechanism flows through the gravel layer of the hard medium artificial fish nest on the underwater substrate platform, simulating the habitat of the natural shallow torrent gravel spawning ground, and providing a suitable habitat for torrent fish to survive and spawn; 2. The present application sets up a soft medium artificial fish nest on the water surface buoyancy platform to provide a spawning place for fish laying adhesive eggs, and a plurality of photovoltaic panels are arranged above the soft medium artificial fish nest, which can play a role in defending against avian enemies and shading the soft medium artificial fish nest, thereby providing a safe, shady and temperature-stable habitat for fish laying eggs in the soft medium artificial fish nest and fish eggs.

[0016] 3. The torrent simulation mechanism of the present application is composed of a flow guide and a vertically arranged submersible flow pusher. The flow guide solves the problem that the water flow generated by the submersible flow pusher is difficult to cover a wide gravel layer. The vertically arranged submersible flow pusher is close to the water surface, thereby playing an oxygenation role, so that the submersible flow pusher can also be used as an oxygenation device in non-spawning seasons.

[0017] The present application will be explained in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the overall structure of the present application; Figure 1 is a side view of the present application; Figure 3 is a schematic diagram of the structure of the floating frame of the present application; Figure 4 is a schematic diagram of the structure of the torrent simulation mechanism of the present application; Figure 5 is a schematic diagram of the structure of the flow guide plate of the present application; Figure 6 is a schematic diagram of the structure of the steering drive mechanism of the present application; Figure 7 is a sectional view of the gravel layer of the present application.

[0019] Reference numerals in the drawings: 1, water surface buoyancy platform; 2, hoisting rod; 3, underwater matrix platform; 4, soft medium artificial fish nest; 5, hard medium artificial fish nest; 6, torrent simulation mechanism; 7, photovoltaic panel; 8, palm fiber bundle; 9, flow guide channel; 10, annular channel; 11, annular jet hole; 12, flow guide plate; 13, flow increasing hole; 14, filter hole; 15, positioning ring; 16, positioning pile; 17, rudder plate shaft; 18, rudder plate; 19, steering drive mechanism; 20, operating rod; 21, strip-shaped hole; 22, guide sleeve; 23, transmission rod; 24, hole mouth; 25, flow pusher frame; 26, floating box; 27, floating box connecting rod; 101, floating frame; 102, rectangular frame; 501, gravel layer; 502, side stop piece; 5011, fish egg attachment layer; 5012, buffer layer; 5013, microorganism attachment layer; 601, submersible flow pusher; 602, flow guide; 1901, linkage rod; 1902, underwater electric push rod. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings, wherein several embodiments of the present application are given, but the present application can be realized in different forms and is not limited to the embodiments described herein, on the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element, the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Please refer to the accompanying drawings Figures 1-6 A fish nest structure suitable for spawning of multi-habit fish, comprising a water surface buoyancy platform 1 and an underwater substrate platform 3 suspended below the water surface buoyancy platform 1 by a plurality of suspension rods 2; A soft medium artificial fish nest 4 is arranged on the water surface buoyancy platform 1, and the top of the underwater substrate platform 3 is provided with a hard medium artificial fish nest 5 comprising a gravel layer 501; The water surface buoyancy platform 1 is connected with a torrent simulation mechanism 6 located at one end of the underwater substrate platform 3, and the torrent simulation mechanism 6 is connected with the water surface buoyancy platform 1 or / and the underwater substrate platform 3; The water surface buoyancy platform 1 is provided with a photovoltaic power supply system comprising a plurality of photovoltaic panels 7 on the top, the photovoltaic power supply system is electrically connected with the torrent simulation mechanism 6, and the soft medium artificial fish nest 4 is located below the plurality of photovoltaic panels 7; The torrent simulation mechanism 6 simulates natural shallow water torrent gravel spawning ground by driving water flow through the gravel layer 501, and promotes the flow of water near the soft medium artificial fish nest 4; The plurality of photovoltaic panels 7 constitute a nest protection function part for providing shade and defense for the soft medium artificial fish nest 4.

[0023] The present application sets up the torrent simulation mechanism 6 between the water surface buoyant platform 1 and the underwater substrate platform 3, and sets up the photovoltaic power supply system with multiple photovoltaic panels 7 on the water surface buoyant platform 1 to supply power for the torrent simulation mechanism 6, on the one hand, the water flow generated by the torrent simulation mechanism 6 flows through the gravel layer 501 on the underwater substrate platform 3, simulating the natural shallow water torrent gravel spawning ground habitat, providing a suitable habitat for the torrent fish to survive and spawn. On the other hand, the soft medium artificial fish nest 4 arranged on the water surface buoyant platform 1 provides a spawning place for the fish such as crucian carp which lay adhesive eggs, and the multiple photovoltaic panels 7 are arranged above the soft medium artificial fish nest 4, which can play a role in defending the aerial enemies and shading the soft medium artificial fish nest 4, thereby providing a safe, shady and temperature stable habitat for the fish and fish eggs laying in the soft medium artificial fish nest 4.

[0024] In addition, the torrent simulation mechanism 6 also has the effect of promoting the flow of water near the soft medium artificial fish nest 4, thereby accelerating the exchange of water at the soft medium artificial fish nest 4 and the surrounding water, which is beneficial to the supply of plankton and nutrients in the water to the soft medium artificial fish nest 4, and provides a good habitat for the parent fish and fry. Moreover, when the soft medium artificial fish nest 4 uses natural plant materials, by accelerating the flow of water, it can effectively prevent the toxic substances produced by the decay of plants from remaining in the soft medium artificial fish nest 4 for a long time. The above beneficial effects are especially suitable for water environments with slow water flow or even dead water, such as when the discharge flow of a reservoir is very small or even zero.

[0025] The hard medium artificial fish nest 5 also includes a side baffle 502 surrounding the gravel layer 501, and the distance between the top of the side baffle 502 and the top of the underwater substrate platform 3 is not less than the thickness of the gravel layer 501.

[0026] The side baffle 502 prevents the gravel of the gravel layer 501 from falling off the underwater substrate platform 3, and the side baffle 502 is preferably a porous structure, such as an iron mesh or bamboo splints arranged in vertical direction, to facilitate the exchange of water at the hard medium artificial fish nest 5 and the surrounding water.

[0027] The gravel layer 501 includes a fish egg attachment layer 5011, a buffer layer 5012 and a microorganism attachment layer 5013 arranged in order from top to bottom, the fish egg attachment layer 5011 has a thickness of 3-5 cm and is paved with granite gravel, the buffer layer 5012 has a thickness of 3-4 cm and is paved with limestone gravel, and the microorganism attachment layer 5013 has a thickness of 3-4 cm and is paved with porous volcanic rock gravel.

[0028] The bottom of the underwater substrate platform 3 is suspended with a bundle of palm fibers 8, and the arrangement density of the bundle of palm fibers 8 is 5 bundles / ㎡.

[0029] The torrent simulator 6 comprises a submerged flow pusher 601 connected with the water surface buoyancy platform 1 and a flow guide 602, the lower end of which extends to both sides and is connected with the hoisting rods 2 on both sides; The inner part of the upper end of the flow guide 602 is provided with a flow guide channel 9, and the submerged flow pusher 601 is vertically arranged at the top end of the flow guide 602, and the blades of the submerged flow pusher 601 are located in the flow guide channel 9; The inner part of the lower end of the flow guide 602 is provided with an annular channel 10 in communication with the flow guide channel 9, and the front end of the flow guide 602 close to the underwater matrix platform 3 is provided with an annular jet hole 11 in communication with the annular channel 10; Both sides of the inner part of the flow guide channel 9 are provided with a plurality of arc-shaped flow guide plates 12, and the flow guide plates 12 on both sides are symmetric about the center line of the flow guide channel 9, and the flow guide plates 12 are arranged obliquely away from the center line of the flow guide channel 9 from top to bottom; The lower end of the flow guide 602 is provided with a flow increasing hole 13 penetrating through the front and back thereof, and the annular channel 10 and the annular jet hole 11 are of a head-to-tail structure, and the annular channel 10 and the annular jet hole 11 are arranged around the flow increasing hole 13.

[0030] In addition, the photovoltaic power supply system usually further comprises a storage battery and an inverter, and taking the underwater matrix platform 3 with a size of 6m×3m as an example, five single-crystal silicon photovoltaic panels 7 with a size of 2279mm×1134mm×35mm and a specification of 550w, a 3000w inverter, five 12V gel batteries with a capacity of 200AH, a 1.5KW submerged flow pusher 601 with a flow rate of 450㎡ / h, and a support for mounting and fixing the photovoltaic panels 7 are used. The arrangement of the gel batteries and the inverter on the water surface buoyancy platform 1 is prioritized to balance the weight of the two ends of the water surface buoyancy platform 1, for example, the inverter and the gel batteries are arranged at one end of the water surface buoyancy platform 1 relative to the submerged flow pusher 601 and the flow guide 602 to balance the weight of the two ends of the water surface buoyancy platform 1. The electric energy generated by the photovoltaic panels 7 is supplied to the submerged flow pusher 601, and the excess electric energy is stored in the gel batteries, so that the electric energy stored in the gel batteries is used to supply power to the submerged flow pusher 601 in the early morning, at night and on rainy days.

[0031] When the submersible flow pusher 601 is working, the blades of the submersible flow pusher 601 are rotated to drive the water above the blades to flow to the water below the blades, and to push the water below the blades to flow along the flow guide channel 9 and the annular channel 10. When the water flow passes through the plurality of flow guide plates 12, the water flow is guided to flow to the two sides, so as to facilitate the water flow to fill the annular channel 10 and to reduce the impact of the inner wall of the annular channel 10. The water in the annular channel 10 is sprayed out from the front slit-shaped annular jet hole 11 under the water pressure. The water flow sprayed out from the annular jet hole 11 forms a rectangular or elliptical water curtain with the front and rear closed. Since the water flow speed of the water curtain is large and the water pressure is low, the water bodies inside and outside the water curtain will flow with the water curtain to the gravel layer 501 in front. The function of the flow increasing hole 13 is to supplement water to the inside of the water curtain (by using Bernoulli's principle, which can be specifically referred to a bladeless fan and a bladeless hair dryer).

[0032] Compared with the way that the water flow directly driven by the submersible flow pusher 601 flows through the gravel layer 501, the water flow driven by the submersible flow pusher 601 is guided and "widened" by the flow guide 602. Not only can the generated water flow act on a wider gravel layer 501, but also the fish behind the submersible flow pusher 601 is avoided from hitting the blades of the submersible flow pusher 601 or the external protection structure under the action of the strong suction force generated by the submersible flow pusher 601. Since the submersible flow pusher 601 is vertically arranged, the submersible flow pusher 601 can be arranged at a position where the fish near the water surface is less likely to pass through, and the submersible flow pusher 601 attracts water flow from all directions, which avoids the problem that the water flow speed is fast in a single direction due to the water flow being attracted from a single direction, and the fish is not easy to escape from the water flow flowing to the submersible flow pusher 601.

[0033] Further optimization on the above embodiment is that the side wall of the flow guide 602 is provided with filter holes 14 communicating with the flow guide channel 9. The upper and lower parts of the blades of the submersible flow pusher 601 are provided with filter holes 14, and the blades of the submersible flow pusher 601 are located in the near-surface water area near the water surface.

[0034] The function of the filter hole 14 is to let the water outside the flow guide 602 flow into the flow guide channel 9 where the blades of the submersible flow pusher 601 are located, and to filter impurities in the water to prevent the impurities from entering the flow guide 602 and causing the flow guide 602 to be blocked. When the blades of the submersible flow pusher 601 are rotated, the water above the blades is driven to flow to the water below the blades. In this process, since the blades are close to the water surface, a vortex is formed at the blades, and the air above the vortex is carried into the flow guide 602 by the water flow under the action of negative pressure, thereby increasing the oxygen content of the water flow flowing to the gravel layer 501. In addition, when the water flow flows in the flow guide channel 9, a negative pressure is formed inside the flow guide channel 9, so that the flow guide channel 9 sucks more water through the filter holes 14 below the blades of the submersible flow pusher 601.

[0035] In addition, in non-spawning season, the height of the submersible flow pusher 601 can be adjusted to expose the blade part of the submersible flow pusher 601 above the water surface, increase the agitation on the water surface, and enhance the oxygenation effect of the submersible flow pusher 601.

[0036] In summary, by arranging the flow guide 602 and optimizing the arrangement of the submersible flow pusher 601, the adverse effects of the submersible flow pusher 601 on the survival of fish can be reduced. More importantly, not only does it solve the problem that the water flow generated by the submersible flow pusher 601 cannot cover a wide gravel layer 501, but it also significantly increases the oxygen content in the water near the hard medium artificial fish nest 5 and has a certain oxygenation effect on the water near the soft medium artificial fish nest 4 above, enabling the submersible flow pusher 601 to be used as an oxygenation device in non-spawning season, thereby improving the application value of the fish nest.

[0037] It is further noted that the filter hole 14 can be cleaned regularly by hand, and a filter screen can be added at the filter hole 14 to keep the filter hole 14 unobstructed by regularly replacing the filter screen. If the water quality in the water area is poor and there are many impurities in the water, impurity scraping components can also be added at the filter hole 14. For example, a sleeve with multiple radially inclined blades relative to the submersible flow pusher 601 is fitted at the filter hole 14, and the water flow enters the flow guide channel 9 through the gap between adjacent blades and the filter hole 14. In this process, the water flow drives the sleeve to rotate by pushing the blades, and the inner side of the blade cooperates with the gap between the circular outer wall at the filter hole 14, thereby being able to scrape and clean the impurities attached at the filter hole 14. Alternatively, the filter hole 14 can be prevented from being blocked by adding a scraping and cleaning component driven by a waterproof motor at the filter hole 14.

[0038] In addition, the flow guide 602 is essentially a shell structure with a flow guide channel 9, an annular channel 10, a flow increasing hole 13, and an annular jet hole 11, and the structure is not complex. It can be assembled in sections to facilitate assembly and disassembly. For example, it is assembled from an upper shell with a flow guide channel 9 and a flow guide plate 12 and a lower shell with an annular channel 10, a flow increasing hole 13, and an annular jet hole 11. The lower shell is connected to the flow guide channel 9 of the upper shell through the opening at the top of the annular channel 10.

[0039] The same side of the water surface buoyancy platform 1 and the underwater matrix platform 3 is provided with a positioning ring 15, and a positioning pile 16 with a fixed lower end is rotatably inserted into the positioning ring 15; A plurality of rudder plate shafts 17 are vertically arranged in the flow increasing hole 13, a rudder plate 18 is rotatably arranged on the rudder plate shaft 17, the rudder plate 18 is connected with a steering driving mechanism 19, and a control module is arranged on the water surface buoyancy platform 1, and the steering driving mechanism 19 is electrically connected with the photovoltaic power supply system through the control module; The control module controls the steering driving mechanism 19 to drive the rudder plate 18 to rotate around the rudder plate shaft 17 according to the sunlight direction, and the water flow at the flow increasing hole 13 impacts the rudder plate 18 to make the water surface buoyancy platform 1 and the underwater substrate platform 3 rotate around the positioning pile 16.

[0040] By driving the water surface buoyancy platform 1 and the sunlight direction to rotate, not only the photovoltaic panel 7 can be directed to the sunlight direction to improve the power generation efficiency of the photovoltaic panel 7, but also the photovoltaic panel 7 can fully play the role of blocking the sunlight from directly irradiating the soft medium artificial fish nest 4 when the photovoltaic panel 7 is directed to the sunlight direction.

[0041] By arranging the rudder plate 18 in the flow increasing hole 13 of the flow guide 602, the integration degree is high, the on-site arrangement is convenient, and the rudder plate 18 is located in the flow increasing hole 13, so the rudder plate 18 is only impacted by the water flow passing through the flow increasing hole 13 and is not easily disturbed by the surrounding water flow, which is beneficial to control the steering. In addition, the rudder plate 18 can be arranged in multiple, but the spacing between adjacent rudder plates 18 should not be too small, especially to meet the needs of the fish passing through the hard medium artificial fish nest 5. And the positioning pile 16 is fixed by inserting the lower end into the riverbed or using the lower end weight such as a concrete weight block.

[0042] In addition, the water surface buoyancy platform 1 and the underwater substrate platform 3 are limited by the positioning ring 15 arranged on the positioning pile 16, which can prevent the water surface buoyancy platform 1 and the underwater substrate platform 3 from swinging and tilting, thereby preventing gravel and fish eggs from separating from the hard medium artificial fish nest 5.

[0043] The control module preferably uses an illumination intensity sensor to detect the illumination intensity of each direction, and adjusts and corrects the angle of the water surface buoyancy platform 1 and the underwater substrate platform 3 according to the illumination intensity detection data. In addition, since the change of the sunlight direction has regularity, the control module can also adjust the angle of the water surface buoyancy platform 1 and the underwater substrate platform 3 based on this regularity. Although this way has low hardware cost and does not need to maintain and clean the sensor, but since there is also water flow and air flow causing the water surface buoyancy platform 1 and the underwater substrate platform 3 to rotate, it is difficult for this way to keep the water surface buoyancy platform 1 and the underwater substrate platform 3 at the set angle.

[0044] The steering driving mechanism 19 includes a linkage rod 1901 and an underwater electric push rod 1902 electrically connected with the control module, and the underwater electric push rod 1902 is arranged on the flow guide 602 and located above the flow increasing hole 13; One end of the rudder plate 18 is connected with the rudder plate shaft 17, and the top of the other end is provided with an operating rod 20, a strip-shaped hole 21 is arranged on the linkage rod 1901 along the length direction of the rudder plate 18, and the operating rod 20 is inserted into the strip-shaped hole 21 and can rotate and slide in the strip-shaped hole 21; The guide flow device 602 is provided with a guide sleeve 22 at both ends of the flow increasing hole 13 for sliding insertion of a linkage rod 1901, and the linkage rod 1901 is connected with an underwater electric push rod 1902 above through a transmission rod 23.

[0045] The underwater electric push rod 1902 is electrically connected with a control module and a photovoltaic power supply system on the water surface buoyant platform 1 through an insulating wire, and is arranged transversely. The underwater electric push rod 1902 drives the linkage rod 1901 to move left and right through a push-pull transmission rod 23, so that the linkage rod 1901 drives a plurality of rudder plates 18 to swing around the corresponding rudder plate shaft 17, and the angle of the rudder plate 18 is adjusted to control the water surface buoyant platform 1 and the underwater substrate platform 3 to turn. The strip-shaped hole 21 and the operating rod 20 act on the linkage rod 1901 and the rudder plate 18, and adapt to the change of the connection position of the linkage rod 1901 and the rudder plate 18 in the length direction of the rudder plate 18 when the rudder plate 18 swings.

[0046] The water surface buoyant platform 1 comprises a floating frame 101 and a rectangular frame 102. The floating frame 101 can be connected by a plurality of floating barrels through ropes or other connecting members in sequence to form a floating structure with the head connected to the tail, or can be a directly integrated floating structure. The rectangular frame 102 is arranged at the top of the floating frame 101. The rectangular frame 102 is fixed on the plurality of floating frames 101 by means of rope binding, fastener fixing, etc. The specific fixing mode is determined according to the actual situation.

[0047] The rectangular frame 102 has a plurality of holes 24, and the soft medium artificial fish nest 4 is arranged at the hole 24 of the rectangular frame 102, so that the parent fish can lay eggs on the soft medium artificial fish nest 4. A plurality of photovoltaic panels 7 are arranged on the rectangular frame 102 through a support.

[0048] One end of the rectangular frame 102 is provided with a flow inducer frame 25, which extends to one end outside the floating frame 101 and is connected with the diving flow inducer 601, so as to facilitate disassembly and adjustment of the diving flow inducer 601. The structure form of the flow inducer frame 25 and the connection mode with the diving flow inducer 601 are not limited here, and can be flexibly selected according to the actual situation. Preferably, the flow inducer frame 25 is detachably arranged on the rectangular frame 102 through fasteners such as bolts, so as to facilitate disassembly and adjustment of the diving flow inducer 601.

[0049] In addition, the outside of the floating frame 101 is provided with a plurality of floating boxes 26 for accommodating the remaining components of the photovoltaic power supply system, such as colloidal batteries and inverters. The floating boxes 26 are connected with the rectangular frame 102 through floating box connecting rods 27, and the floating box connecting rods 27 are detachably arranged on the rectangular frame 102, so as to adjust the positions of the plurality of floating boxes 26 according to the balance needs.

[0050] The underwater substrate platform 3 can meet the need of supporting the gravel layer 501 and is non-toxic, for example, can be a platform bundled by multiple bamboo or pipes side by side, or can be directly formed by splicing plates, and the specific selection can be made according to actual needs. Similarly, the hoisting rod 2 can meet the need of hoisting the underwater substrate platform 3 and is non-toxic, and the top end of the hoisting rod 2 can be connected with the floating frame 101 or the rectangular frame 102, and the specific selection can be made according to the size of the water surface buoyancy platform 1 and the underwater substrate platform 3, the connection mode of the hoisting rod 2 with the water surface buoyancy platform 1 and the underwater substrate platform 3, and the like.

[0051] The application is described above by way of example with reference to the accompanying drawings, and it is obvious that the specific implementation of the application is not limited by the above manner, and any non-essential improvement or direct application of the concept and technical scheme of the application to other occasions is within the protection scope of the application.

Claims

1. A fish nest structure adaptable to the spawning of fish with diverse habits, characterized in that: It includes a surface buoyancy platform (1) and an underwater matrix platform (3) suspended below the surface buoyancy platform (1) by multiple lifting rods (2); The surface buoyancy platform (1) is provided with a soft medium artificial fish nest (4), and the top of the underwater matrix platform (3) is provided with a hard medium artificial fish nest (5) including a gravel layer (501). The surface buoyancy platform (1) is connected to a turbulence simulation mechanism (6) located at one end of the underwater matrix platform (3). The top of the surface buoyancy platform (1) is equipped with a photovoltaic power supply system including multiple photovoltaic panels (7). The photovoltaic power supply system is electrically connected to the turbulence simulation mechanism (6), and the soft medium artificial fish nest (4) is located below the multiple photovoltaic panels (7). The rapid flow simulation mechanism (6) simulates a natural shallow rapid gravel spawning ground by driving water flow through the gravel layer (501) and promotes the flow of water near the soft medium artificial fish nest (4).

2. The fish nest structure adaptable to the spawning of fish with diverse habits according to claim 1, characterized in that: The hard-medium artificial fish nest (5) also includes side panels (502) surrounding the gravel layer (501), and the distance between the top of the side panels (502) and the top of the underwater matrix platform (3) is not less than the thickness of the gravel layer (501).

3. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 1, is characterized in that: The gravel layer (501) includes, from top to bottom, a fish egg attachment layer (5011), a buffer layer (5012), and a microbial attachment layer (5013). The fish egg attachment layer (5011) is 3-5 cm thick and is made of granite gravel. The buffer layer (5012) is 3-4 cm thick and is made of limestone gravel. The microbial attachment layer (5013) is 3-4 cm thick and is made of porous volcanic rock gravel.

4. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 1, characterized in that: The bottom of the underwater matrix platform (3) is suspended with palm fiber bundles (8), and the arrangement density of the palm fiber bundles (8) is 5 bundles / ㎡.

5. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 1, characterized in that: The turbulence simulation mechanism (6) includes a submersible thruster (601) and a guide (602). The submersible thruster (601) is connected to the surface buoyancy platform (1), and the lower end of the guide (602) extends to both sides and is connected to the hoisting rods (2) on both sides. The upper end of the flow guide (602) is provided with a flow guide channel (9), and the submersible thruster (601) is vertically installed at the top of the flow guide (602), with the blades of the submersible thruster (601) located inside the flow guide channel (9). The lower end of the flow guide (602) is provided with an annular channel (10) communicating with the flow guide channel (9), and the front end of the flow guide (602) near the underwater matrix platform (3) is provided with an annular jet hole (11) communicating with the annular channel (10). Multiple guide plates (12) are provided on both sides inside the flow channel (9), and the two guide plates (12) are symmetrical about the center line of the flow channel (9). The guide plates (12) are inclined from top to bottom to the side away from the center line of the flow channel (9). The lower end of the flow guide (602) is provided with a flow-increasing hole (13) that runs through it from front to back. The annular channel (10) and the annular jet hole (11) are both connected end to end, and the annular channel (10) and the annular jet hole (11) are both arranged around the flow-increasing hole (13).

6. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 5, characterized in that: The guide (602) has a filter hole (14) on its side wall that connects to the guide channel (9). The submersible thruster (601) has filter holes (14) above and below its blades, and the blades of the submersible thruster (601) are located in the near-surface water area close to the water surface.

7. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 5, characterized in that: Both the surface buoyancy platform (1) and the underwater matrix platform (3) are provided with positioning rings (15) on the same side, and positioning piles (16) with fixed lower ends are rotatably inserted into the positioning rings (15). Multiple rudder shafts (17) are vertically arranged inside the flow-increasing hole (13). Rudders (18) are rotatably arranged on the rudder shafts (17). The rudders (18) are connected to a steering drive mechanism (19). A control module is provided on the water surface buoyancy platform (1). The steering drive mechanism (19) is electrically connected to the photovoltaic power supply system through the control module. The control module controls the steering drive mechanism (19) to drive the rudder plate (18) to rotate around the rudder plate axis (17) according to the direction of sunlight. The water flow at the flow booster hole (13) impacts the rudder plate (18) so that the surface buoyancy platform (1) and the underwater matrix platform (3) turn around the positioning pile (16).

8. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 7, characterized in that: The steering drive mechanism (19) includes a linkage rod (1901) and an underwater electric actuator (1902) electrically connected to the control module. The underwater electric actuator (1902) is disposed on the flow guide (602) and located above the flow booster (13). One end of the rudder plate (18) is connected to the rudder plate shaft (17), and the top of the other end is provided with an operating rod (20). The linkage rod (1901) is provided with a strip hole (21) along the length direction of the rudder plate (18). The operating rod (20) is inserted into the strip hole (21) and can rotate and slide in the strip hole (21). The flow guide (602) is provided with guide sleeves (22) at both ends of the flow boosting hole (13) for sliding insertion of the linkage rod (1901). The linkage rod (1901) is connected to the underwater electric push rod (1902) above through the transmission rod (23).

9. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 1, characterized in that: The water surface buoyancy platform (1) includes a floating frame (101) and a rectangular frame (102), with the edge of the rectangular frame (102) set on the top of the floating frame (101); The rectangular frame (102) has multiple openings (24), the soft medium artificial fish nest (4) is set at the openings (24) of the rectangular frame (102), and the photovoltaic panel (7) is set on the rectangular frame (102) by a bracket.

10. A fish nest structure adaptable to the spawning of fish with diverse habits, as described in claim 9, characterized in that: One end of the rectangular frame (102) is provided with a thruster frame (25), and the thruster frame (25) extends to one end outside the floating frame (101) and is connected to the submersible thruster (601). The outer side of the floating frame (101) is provided with several floating boxes (26) for housing the remaining components of the photovoltaic power supply system. The floating boxes (26) are connected to the rectangular frame (102) through floating box connecting rods (27).

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