Fry collecting device
By installing fish fry collection devices on small boats, the problem of low fish fry collection efficiency has been solved, enabling efficient and continuous fish fry collection, improving survival rates, adapting to various environments, and reducing economic costs.
Patent Information
- Application Number
- CN202423240823.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing technologies are insufficient for efficiently collecting fish fry, especially in shallow environments such as rivers and reservoirs. The small size and limited swimming ability of the fish fry result in low collection efficiency and make continuous operation difficult. Manual netting is also ineffective.
A fish fry collection device was designed and installed on a small boat. It includes a height adjustment mechanism, a fish inlet, a net, and a fish fry collection box. The device automatically collects fish fry through the fish inlet channel, adapts to different water depths, avoids manual netting, and improves collection efficiency and survival rate.
It features a simple structure, easy installation, adaptability to various outdoor environments, and continuous operation, thereby improving the efficiency and survival rate of fish fry collection and reducing economic costs.
Smart Images
Figure CN223653044U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fishery equipment, and in particular to a fish fry collection device. Background Technology
[0002] Due to the needs of flood control, power generation, and navigation, damming projects are frequently constructed in rivers and lakes, bringing a series of negative impacts to aquatic ecosystems. These include negative effects on natural fish populations. For example, damming can block or delay fish migration, causing habitat loss or alteration, fragmentation of fish habitats, and consequently, a general decline in fishery resources, or even extinction. Therefore, corresponding fish passage facilities are usually built along with dams to help fish exchange genes upstream and downstream.
[0003] The fish passage facilities include an upstream fish passage system and a downstream fish passage system. The upstream fish passage system involves attracting target fish downstream of the dam to the fish collection channel, lifting the target fish to the sorting layer through the fish collection bucket, and then transporting the collected target fish to the designated release point upstream of the dam by fish transport vehicles. The downstream fish passage system involves collecting fish fry in the reservoir area upstream of the dam using fish collection boats, nets, and other methods, and then transporting the collected fish fry to the designated release point downstream of the dam by fish transport vehicles.
[0004] Because the fish fry are small and have limited swimming ability, and mostly inhabit shallow waters of rivers and reservoirs, large fish-collecting boats have difficulty getting close, and they can only be caught by manual netting. However, when the fish fry are startled, manual netting is usually difficult to complete continuously, resulting in low efficiency in fish fry collection. Utility Model Content
[0005] In order to overcome the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a fish fry collection device with a simple and reasonable overall structure, convenient installation, and the ability to be installed on ordinary small fishing boats. It is adaptable to various outdoor environments, completes the fish fry collection work, is easy to operate, and improves the efficiency of fish fry collection.
[0006] To achieve the above objectives, this utility model provides a fish fry collection device, installed on a boat hull, including a height adjustment mechanism installed at the front of the hull, a fish inlet connected to the height adjustment mechanism and located below the water surface, a net connected around the fish inlet, a fish inlet channel connected to the other end of the net and extending towards the rear of the hull, and a fish fry collection box connected to the other end of the fish inlet channel; the front of the fish fry collection box is a waterproof arc-shaped baffle, and water-permeable holes are evenly distributed around the fish fry collection box and at the bottom; the fish fry enter the fish fry collection box through the funnel-shaped inlet formed by the fish inlet and the net and enter the fish inlet channel.
[0007] Preferably, the height adjustment mechanism includes a base symmetrically and fixedly arranged on the hull, a first connecting rod rotatably connected to the base, a crossbar connecting the other ends of the two parallel first connecting rods, and two parallel second connecting rods connected at right angles to the crossbar; a support rod fixed to the hull is provided below the middle of the first connecting rod, the support rod being an electro-hydraulic rod, the telescopic end of which is movably connected to the middle of the first connecting rod; the other ends of the two second connecting rods are connected to both sides of the fish inlet.
[0008] Furthermore, the fish inlet channel is a connecting pipe, and the pipe body is fixed to the bottom of the hull by a pipe fixing component; the fish fry collection box, which is connected to the other end of the connecting pipe, is fixed to the side of the hull by a fish fry collection box fixing component.
[0009] Preferably, the fish inlet channel is a hollow structure located at the bottom of the hull, and the fish fry collection box connected to the hollow structure is located at the rear end of the hull.
[0010] Furthermore, the lower half of the mesh is made of an impermeable material, while the upper half is a permeable mesh.
[0011] Furthermore, two water-blocking mesh panels are respectively installed on both sides of the inside of the fish fry collection box, and water-permeable holes are provided in the middle of the water-blocking mesh panels.
[0012] Preferably, the base, the first connecting rod, the second connecting rod, and the fish inlet are all metal components.
[0013] Furthermore, a debris-blocking net is installed at the front end of the fish inlet.
[0014] Compared with the prior art, the beneficial effects of the fish fry collection device of this utility model are as follows:
[0015] 1. It has a simple structure and is easy to install. It can be installed on ordinary fishing boats to collect fish fry, and the economic cost is low.
[0016] 2. The height of the fish inlet can be adjusted by a height adjustment mechanism consisting of a base, a first connecting rod, a support rod, a crossbar, and a second connecting rod. This allows it to adapt to different water depths, making it widely applicable and safer.
[0017] 3. It allows for continuous operation, improving the efficiency of fish fry collection;
[0018] 4. The fish fry enter the fish fry collection box through the funnel-shaped inlet composed of the fish inlet and the netting. Throughout the process, the fish fry collection box can prevent the fish fry from leaving the water, eliminating the need for manual netting and improving the survival rate of the fish fry. Attached Figure Description
[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a front view of the fish fry collection device of this utility model;
[0021] Figure 2 This is a top view of the fish fry collection device of this utility model;
[0022] Figure 3 This is a side view of the fish fry collection device of this utility model;
[0023] Figure 4 This is a schematic diagram of another embodiment of the fish fry collection device of this utility model.
[0024] In the diagram: 1-base; 2-first connecting rod; 3-net; 4-support rod; 5-connecting pipe; 6-fish fry collection box; 7-second connecting rod; 8-barrier net; 9-pipe fixing component; 10-fish inlet; 11-fish fry collection box fixing component; 12-crossbar; 13-cavity structure. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] See below. Figures 1-4 The fish fry collection device of this utility model will be described in detail.
[0027] The fish fry collection device of this utility model includes a base 1, a first connecting rod 2, a second connecting rod 7, a support rod 4, a crossbar 12, a fish inlet 10, a net 3, a connecting pipe 5, a pipe fixing component 9, a fish fry collection box 6, and a fish fry collection box fixing component 11. The base 1 is symmetrically fixed to the front plate of the hull. The two first connecting rods 2 are arranged parallel to each other on the left and right sides. The base 1 is connected to one end of each first connecting rod 2. The middle part of the first connecting rod 2 is movably connected to the top of the support rod 4, and the bottom end of the support rod 4 is fixed to the hull. A crossbar 12 is connected between the other ends of the two first connecting rods 2. The two ends of the crossbar 12 are connected at right angles to one end of each of the two second connecting rods 7. The two second connecting rods 7 are arranged parallel to each other on the left and right sides, and the other ends of the two second connecting rods 7 are connected to both sides of the fish inlet 10 located below the water surface.
[0028] The aforementioned base 1, first connecting rod 2, support rod 4, crossbar 12, and second connecting rod 7 constitute a height adjustment mechanism. The height adjustment mechanism is installed at the front of the hull and is used to adjust the height of the fish inlet 10.
[0029] Net 3 is a tapered net post that tapers from the front end to the rear end of the hull. The two ends of net 3 are connected. One end of net 3 is connected to the perimeter of fish inlet 10, and the other end of net 3 is connected to one end of fish inlet channel extending to the rear end of the hull. The other end of fish inlet channel is connected to fish fry collection box 6.
[0030] When conducting fish fry collection operations in outdoor rivers or shallow waters of reservoirs, large fishing boats cannot approach the riverbank to complete the work due to limitations imposed by the water depth and complex riverbed geography. In this case, a base 1 is fixed to a clamp plate at the front of a light, ordinary boat. The base 1 is installed and fixed symmetrically on both sides. Correspondingly, one end of each of the two first connecting rods 2 is connected and fixed to the two bases 1 respectively, and the two first connecting rods 2 are parallel to each other. A crossbar 12 is set at the other end of the two first connecting rods 2, and the two ends of the crossbar 12 are fixed to the other ends of the two first connecting rods 2 respectively. One end of each of the two second connecting rods 7 is connected at right angles to the two ends of the crossbar 12, and the other ends of the two second connecting rods 7 are connected to both sides of the fish inlet 10.
[0031] The fish inlet 10 of this invention preferably adopts a rectangular structure. One end of the net 3 is connected to the perimeter of the fish inlet 10, and the other end of the net 3 is connected to one end of the fish inlet channel. The other end of the fish inlet channel is connected to the front end of the fry collection box 6. The fish inlet 10, net 3, connecting pipe 5, and fry collection box 6 are interconnected. The size of the mesh 3 is customized according to the body length of the target fry to ensure that the fry will not escape or get stuck due to excessively large mesh during the fry collection process, resulting in a higher fry survival rate. During the fry collection, the boat can approach the shore or shallow water, adjust its speed, and travel at a constant speed along the direction where the fry gather. The fish inlet 10 is submerged about 10cm-20cm below the water surface and kept stable. The fry enter the fry collection box 6 through the funnel-shaped entrance formed by the fish inlet 10 and net 3 via the fish inlet channel. The staff uses a small net to scoop up the collected fry and place them in the temporary holding equipment on the boat to ensure continuous fry collection.
[0032] Specifically, the base 1 is movably connected to one end of the first connecting rod 2, and the support rod 4 is an electro-hydraulic rod, the telescopic end of which is movably connected to the middle of the first connecting rod 2. Specifically, to adapt to different outdoor conditions, the diving depth of the fish inlet 10 needs to be adjusted at any time according to the swimming depth of the fish fry using a height adjustment mechanism. The bottom end of the electro-hydraulic rod is fixedly installed on the hull plate, and the height of the support rod 4 is adjusted by the electro-hydraulic rod, thereby adjusting the diving depth of the fish inlet 10.
[0033] In one embodiment, such as Figure 2 As shown, the fish inlet channel is a connecting pipe 5, and the body of the connecting pipe 5 is fixed to the bottom of the hull via a pipe fastener 9. The other end of the connecting pipe 5 is connected to the front end of the fish fry collection box 6. The fish fry collection box 6 is fixed to the side of the hull via a fish fry collection box fastener 11, and the upper end of the fish fry collection box 6 is open. The connecting pipe 5 and the fish fry collection box 6 are fixed to the bottom and side of the hull respectively via the pipe fastener 9 and the fish fry collection box fastener 11.
[0034] In another embodiment, such as Figure 3 As shown, the fish inlet channel is a hollow structure 13 located at the bottom of the hull, and the fish fry collection box connected to the hollow structure 13 is located at the rear end of the hull.
[0035] Based on the above embodiments, the base 1, the first connecting rod 2, the support rod 4, the second connecting rod 7, and the fish inlet 10 are metal components. The use of metal components, which are directly bolted or welded, makes the device more durable.
[0036] Based on the above embodiments, the lower half of the net 3 is made of a waterproof material, while the upper half is a permeable net. Using a waterproof and wear-resistant material for the lower half of the net 3 prevents underwater debris from obstructing or tangling the fish during navigation; the upper half is a permeable net, with the mesh size customized according to the size of the target fish fry, ensuring that the fry will not escape or get stuck due to excessively large mesh size during collection, resulting in a higher survival rate.
[0037] Based on the above embodiments, the front end of the fish fry collection box 6 is a waterproof arc-shaped baffle; the fish fry collection box 6 has evenly distributed permeable holes around its perimeter and bottom. The waterproof arc-shaped baffle at the front end of the fish fry collection box 6 reduces water flow resistance during navigation and the impact of water flow on the fish fry inside the collection box 6, ensuring the survival rate of the fish fry. The evenly distributed permeable holes around its perimeter and bottom, with the hole size customized according to the size of the target fish fry, prevent unstable component connections due to buoyancy inside the fish fry collection box 6, and also alleviate the impact of water flow and water accumulation at the outlet of the fish inlet channel.
[0038] Based on the above embodiments, two water-blocking mesh panels are respectively installed on both sides of the inside of the fish fry collection box 6, and water-permeable holes are provided in the middle of the water-blocking mesh panels. When the boat is moving, the fish will enter the fish fry collection box 6 through the fish inlet channel, and at the same time, the water flow brought out by the fish outlet of the fish inlet channel will impact the fish fry collection box 6. By installing water-blocking mesh panels on both sides of the inside of the fish fry collection box 6, and the water-permeable holes in the middle area of the water-blocking mesh panels, and sealing the surrounding area, two independent slow-flow areas can be formed on both sides of the fish fry collection box 6, which can facilitate the fish fry to rest and improve the survival rate of the fish fry.
[0039] Based on the above embodiments, a debris barrier 8 is installed at the front end of the fish inlet 10. The debris barrier 8 has a conical mesh structure and the gaps in the debris barrier 8 are appropriately sized, which can block debris without affecting the entry of fish fry. During the boat's journey, the debris barrier 8 can effectively block underwater debris in front, so that the fish inlet 10 is not blocked by debris and thus does not affect the fish fry collection work.
[0040] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any transformations or substitutions that can be understood by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of this utility model.
Claims
1. A fish fry collection device, installed on the hull of a ship, characterized in that: It includes a height adjustment mechanism installed at the front of the hull, a fish inlet (10) connected to the height adjustment mechanism and located below the water surface, a net (3) connected around the fish inlet (10), a fish inlet channel connected to the other end of the net (3) and extending to the rear of the hull, and a fish fry collection box (6) connected to the other end of the fish inlet channel. The front end of the fish fry collection box (6) is a waterproof arc-shaped baffle, and water-permeable holes are evenly distributed around the fish fry collection box (6) and at the bottom. The fish fry enter the fish fry collection box (6) through the fish inlet (10) and the net (3) forming a funnel-shaped inlet.
2. The fish fry collection device according to claim 1, characterized in that, The height adjustment mechanism includes a base (1) fixedly arranged on the hull with left and right sides symmetrically arranged, a first connecting rod (2) rotatably connected to the base (1), a crossbar (12) connected between the other ends of the two parallel first connecting rods (2), and two parallel second connecting rods (7) connected at right angles to the crossbar (12). The first connecting rod (2) has a support rod (4) fixed to the hull at the lower middle part. The support rod (4) is an electric hydraulic rod, and its telescopic end is movably connected to the middle part of the first connecting rod (2). The other ends of the two second connecting rods (7) are connected to both sides of the fish inlet (10).
3. The fish fry collection device according to claim 1, characterized in that, The fish inlet channel is a connecting pipe (5), and the pipe body of the connecting pipe (5) is fixed to the bottom of the hull by a pipe fastener (9); The fish fry collection box (6), which is connected to the other end of the connecting pipe (5), is fixed to the side of the hull by the fish fry collection box fixing piece (11).
4. The fish fry collection device according to claim 1, characterized in that, The fish inlet channel is a hollow structure (13) located at the bottom of the hull, and the fish fry collection box (6) connected to the hollow structure (13) is located at the rear end of the hull.
5. The fish fry collection device according to claim 1, characterized in that, The lower half of the mesh (3) is made of an impermeable material, while the upper half is a permeable mesh.
6. The fish fry collection device according to claim 1, characterized in that, The fish fry collection box (6) has two water-blocking nets on its inner sides, and the water-blocking nets have water-permeable holes in the middle.
7. The fish fry collection device according to claim 2, characterized in that, The base (1), the first connecting rod (2), the second connecting rod (7), and the fish inlet (10) are all metal components.
8. The fish fry collection device according to claim 1, characterized in that, A debris screen (8) is installed at the front end of the fish inlet (10).