A device for collecting fish eggs of reef fish

Abstract

The application discloses a device for collecting fish eggs of reef fish, and belongs to the technical field of fish breeding. The device comprises a collector, the main body of which is in a cylindrical tube structure, one end of which is open and provided with a flow guide pipe, the outside of the flow guide pipe is connected with a filter assembly, the other end of the collector is provided with a cover plate, the outer side of the collector is provided with a propeller thruster, the inner side of the collector is provided with a baffle, the baffle is provided with a water pump, the water pump is connected with one end of a water suction pipe, the other end of the water suction pipe is connected with the outside of the collector, the collector is internally provided with a cylinder, and the water pump is separated from the cylinder through an obliquely arranged filter screen; and the device further comprises a boat-shaped float, the center of gravity of the boat-shaped float is located at the bottom, a float is fixedly connected below the boat-shaped float, and the boat-shaped float is connected with the top of the collector through an extensible pipe. The device is suitable for collecting fish eggs of reef fish, consumes less manpower and material resources, causes less damage to the fish eggs, can realize long-time continuous collection of the fish eggs, and improves the fish egg collection efficiency.

Description

Technical Field

[0001] This invention belongs to the field of fish breeding technology, specifically relating to a device for collecting fish eggs from rocky reef fish. Background Technology

[0002] Rock reef fish, valued for their delicious flesh or their beautiful shapes and vibrant colors, are highly prized for their ornamental value, making them a popular target for aquaculture and fishing. Rock reefs serve as the foundation for these fish, providing them with spawning grounds. The eggs of migratory fish are typically non-adhesive, separate, and float freely, while the eggs of resident fish are usually adhesive, either adhering to the substrate or clumping together. Non-adhesive eggs generally have a thinner egg membrane with a simpler outer structure; adhesive eggs have a thicker and more complex egg membrane, undergoing physical and chemical changes upon contact with water, allowing them to adhere to various substrates. Currently, the efficiency of collecting rock reef fish eggs using existing technologies is low, and adhesive eggs are easily damaged during collection.

[0003] Russian patent RU171294U1 describes a fish egg collection technology. The main component is a water tank divided into two compartments. One compartment houses a water pump, while the other is used for collecting fish eggs. A filter screen with mesh sizes smaller than the diameter of the fish eggs to be collected is installed between the two compartments. The water pump draws water out, creating a pressure difference that draws the fish eggs into the tank. This technology can be used to collect both adhesive and non-adhesive eggs; however, because the tank is permanently positioned after installation, its efficiency for collecting eggs attached to a substrate is relatively low. Summary of the Invention

[0004] The purpose of this invention is to provide a device for collecting fish eggs of rocky reef fish, enabling rapid collection of both non-adhesive and adhesive eggs, reducing damage to the fish eggs during the collection process, and improving the survival rate of the fish eggs.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned objective is: a device for collecting fish eggs of rocky reef fish, comprising: A collector, having an opening at one end and a guide tube, comprises a detachably connected first cylinder and a second cylinder. A second filter screen, inclined to the axis of the first cylinder, is located at the connection between the first and second cylinders. One end of the first cylinder has an opening and is fitted with the guide tube. The other end of the first cylinder has an inclined slit. The second filter screen is adapted to the slit, and a cover plate extends outward from the slit. The second cylinder can be inserted into the slit and communicate with the interior of the first cylinder to form a receiving space. A propeller is mounted on the second cylinder. A baffle is located inside the second cylinder and can be fixed to the edge of the second filter screen. A water pump is built into the second cylinder and is mounted on the side of the baffle. The water pump is connected to a suction pipe located outside the second cylinder. A cylindrical section is located inside the first cylinder, adjacent to the inner wall of the first cylinder and capable of rotating relative to the inner wall of the first cylinder.

[0006] This invention involves placing a collector underwater and using a pump and a suction pipe to draw water out of the collector, creating a negative pressure at the collector's opening. Fish eggs from reef-dwelling fish are then drawn in and pass through a filter assembly and a guide pipe into the collector. The spiral structure of the guide pipe guides the water flow, causing it to move forward in a spiral motion. The cylinder inside the collector can only rotate due to its limited position. Under the impact of the water flow, the cylinder makes a circular motion, and part of the kinetic energy of the water flow is converted into the kinetic energy of the cylinder. This allows the fish eggs to be distributed as evenly as possible on the inner wall of the collector. This avoids the fish eggs from being overly concentrated in the center of the cylinder during collection, which could cause some fish eggs to be crushed and inactivated. Furthermore, the fish eggs are dispersed on the inner wall of the cylinder, i.e., the inner wall of the collector. This helps the fish eggs to come into contact with the second filter in batches, reducing the damage to the fish eggs caused by the second filter and reducing the probability that the diameter of the eggs will change due to pressure and fail to pass through the second filter. In addition, by setting the second filter to be inclined, it can be combined with the rotating cylinder to reduce the possibility of the fish eggs being overly concentrated due to the centrifugal force generated by the rotation of the collector during the movement inside the collector. This also solves the problem of fish eggs being concentrated and causing local clogging of the second filter, thereby improving the filtering effect and filtration efficiency of the second filter.

[0007] The second filter screen, placed at an angle inside the collector, is a fine-mesh filter screen, which can prevent fish eggs from entering the water pump. The propeller on the outside of the collector can move it in the water, improving the collection efficiency.

[0008] To maintain balance, a float is connected to the outside of the collector via a telescopic tube, with buoys attached to both sides of the float. One end of the float has an open structure that is recessed inwards, and the other end of the float's opening connects to the telescopic tube. The buoys are positioned on both sides of the float near the connection point between the telescopic tube and the float. The float's center of gravity is at the bottom, allowing it to maintain balance even in large waves. To collect fish eggs at different depths in the water, the telescopic tube is used to adjust the collector's depth. Furthermore, the buoys have a plate-like structure, which works in conjunction with the float to improve the device's stability in the water. For surface waves, the float and buoys effectively absorb water, and when the buoys come into contact with surface waves, they help guide changes in the flow direction of the water on the surface and below the buoys. For example, the waves can cause the buoys to swing, influencing the horizontally flowing fluid below them and changing its direction. This helps to move fish eggs from the surface or upper water layers downwards, improving the collector's collection efficiency.

[0009] Optionally, the guide pipe has a built-in filter assembly, which includes a first filter screen. The first filter screen has a semi-circular structure, and there are at least two first filter screens arranged alternately on the inner wall of the guide pipe, with a gap between adjacent first filter screens. A ring is fixed to the inner wall of the guide pipe inlet end, and a rotatable three-bladed blade is provided inside the ring. The ring has a support rod, and the three-bladed blade is located at the center of the ring, with a rotating shaft connected to the support rod, and a rotating component is provided at the connection point. Layered filtration reduces the damage to the filter screen caused by water flow impact. To solve the problem of filter screen clogging, a cleaning assembly is provided on the outside of the first filter screen. The cleaning three-bladed blade is made of rubber. Under the action of water flow, the three-bladed blade rotates, thereby cleaning the filter screen. The rotation of the three-bladed blade helps to form an inward vortex, guiding fish eggs into the guide pipe. At the same time, the rotational movement of the three-bladed blade on the guide pipe can control the flow surface at the guide pipe opening, effectively preventing fish from entering or approaching the guide pipe.

[0010] Optionally, the inner wall of the cylinder is coated with a substrate that mimics the growth environment of rocky reef fish. The substrate on the cylinder wall can provide an attachment medium for sticky fish eggs, supply nutrients, and improve the survival rate of the fish eggs. After collection, the collector is retrieved ashore, placed vertically with the opening facing upwards, and shaken. The cover is then opened, and the sticky fish eggs adhering to the cylinder wall, the sticky fish eggs that have clumped together, and the scattered non-sticky eggs are collected to one side of the baffle and discharged from the collector.

[0011] This invention is applicable to the collection of fish eggs from rocky reef fish. It requires less manpower and resources, causes less damage to the fish eggs, and enables continuous collection of fish eggs over a long period of time, thereby improving the efficiency of fish egg collection. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This application illustrates an apparatus for collecting eggs of reef-dwelling fish according to an embodiment of the present application; Figure 2 A cross-sectional view of the data collector proposed in an embodiment of this application is shown; Figure 3 This is a front view of the apparatus for collecting fish eggs of rocky reef fish according to an embodiment of this application; Figure 4 A schematic diagram of the filtering component proposed in an embodiment of this application is shown; Figure 5 The propeller of the device for collecting fish eggs of rocky reef fish proposed in the embodiments of this application is shown. Figure 6 This is a top view of the apparatus for collecting fish eggs of rocky reef fish according to an embodiment of this application; Figure 7 This diagram illustrates the equilibrium state of the device for collecting fish eggs from rocky reef fish according to an embodiment of this application. Figure 8 This diagram illustrates a form of imbalance in the device for collecting eggs of reef fish proposed in an embodiment of this application. Figure 9 This diagram illustrates a second type of imbalance in the device for collecting eggs of reef fish proposed in this application.

[0013] Explanation of reference numerals in the attached diagram: 1-Collector; 2-Filter assembly; 3-Guide pipe; 4-Cylinder; 5-Second filter screen; 6-Pumping pipe; 7-Water pump; 8-Propeller; 9-Extendable pipe; 10-Buoy; 11-Float; 12-Baffle; 13-Cover plate; 201-First filter screen; 202-Three-blade blade; 203-Ring. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0015] Example 1: See Figures 1-6 A device for collecting eggs of reef-dwelling fish, comprising: Collector 1, one end of which has an opening and is provided with a guide pipe 3, the collector 1 includes a first cylinder and a second cylinder that are detachably connected, and a second filter screen 5 that is inclined to the axis of the first cylinder is provided at the connection between the first cylinder and the second cylinder. The first cylinder has an opening at one end and is fitted with a guide pipe 3. The other end of the first cylinder has an inclined cut. The second filter 5 is adapted to the cut. The cut extends outward with a cover plate 13. The second cylinder can be inserted into the cut and communicate with the inside of the first cylinder to form a receiving space. The second cylinder is equipped with a propeller 8. The inside of the second cylinder is equipped with a baffle 12. The baffle 12 can be connected and fixed to the edge of the second filter 5.

[0016] The second cylinder houses a water pump 7, which is mounted on the side of the baffle 12. The water pump 7 is connected to a suction pipe 6, which is located outside the second cylinder. The first cylinder contains a cylindrical tube 4, which is adjacent to the inner wall of the first cylinder and can rotate relative to the inner wall of the first cylinder. A float 11 is connected to the outside of the collector 1 via a telescopic tube 9. Buoys 10 are connected to both sides of the float 11. One end of the float 11 has an open structure that is recessed inward, and the other end of the opening is connected to the telescopic tube 9. The buoys 10 are located on both sides of the float 11 near the connection between the telescopic tube 9 and the float 11.

[0017] This invention places the collector 1 underwater, and uses a water pump 7 and a water pipe 6 to pump water out of the collector 1, thereby creating a negative pressure at the opening of the collector 1. Fish eggs of reef-dwelling fish are drawn in and enter the collector 1 through the filter assembly 2 and the guide pipe 3. The spiral structure of the guide pipe 3 guides the water flow, causing it to move forward in a spiral. The cylinder 4 inside the collector 1 can only rotate due to its limited position. Under the impact of the water flow, the cylinder 4 undergoes circular motion, and part of the kinetic energy of the water flow is converted into the kinetic energy of the cylinder 4. This promotes the even distribution of fish eggs on the inner wall of the collector 1, thus preventing the fish eggs from being overly concentrated in the center of the cylinder during collection, which could cause some fish eggs to be crushed and inactivated. Further dispersing the fish eggs along the inner wall of the cylinder 4 (i.e., the inner wall of the collector 1) helps the fish eggs to come into contact with the second filter 5 in batches, reducing the damage to the fish eggs caused by the second filter 5 and decreasing the probability of the egg diameter changing due to pressure and failing to pass through the second filter 5. Furthermore, by setting the second filter 5 to an inclined position, in conjunction with the rotating cylinder, the possibility of excessive concentration of fish eggs caused by the centrifugal force generated during the movement of the collector 1 is reduced. This also solves the problem of localized clogging of the second filter 5 due to concentrated fish eggs, thereby improving the filtration effect and efficiency of the second filter 5. The fish eggs are evenly distributed inside the collector 1. The second filter 5, placed at an angle inside the collector 1, is a fine-mesh filter. This filter prevents fish eggs from entering the water pump 7. The propeller 8 on the outside of the collector 1 allows it to move in the water, improving collection efficiency. To maintain balance, the outside of the collector 1 is connected to a boat-shaped float 11, which is placed on the water surface. The center of gravity of the float 11 is at the bottom, allowing it to maintain balance even in large waves. To collect fish eggs at different depths in the water, a telescopic tube 9 is used to adjust the depth of the collector 1 in the water. Furthermore, the buoy 10 has a plate structure, which, together with the float 11, improves the stability of the device in water. For surface waves, the float 11 and buoy 10 can effectively absorb water, and when the buoy 10 is in contact with surface waves, it helps to guide the change in the flow direction of the water on the surface and below the buoy 10. For example, the waves can be used to cause the buoy 10 to swing, thereby influencing the fluid flowing horizontally below it, changing its flow direction to a more directional one. This helps to move fish eggs from the surface or upper water layer downwards, improving the collection efficiency of the collector 1. This invention is suitable for collecting fish eggs from rocky reef fish, requiring less manpower and resources, causing less damage to the fish eggs, and enabling long-term continuous collection of fish eggs, thus improving the efficiency of fish egg collection.

[0018] Example 2: Further optimization of the fish egg collection device for rocky reef fish based on Example 1: Optionally, the guide pipe 3 has a built-in filter assembly 2, which includes a first filter screen 201. The first filter screen 201 has a semi-circular structure, and there are at least two first filter screens 201 arranged alternately on the inner wall of the guide pipe 3, with a gap between adjacent first filter screens 201. The inner wall of the inlet end of the guide pipe 3 is provided with a ring 203 fixed to its inner wall. The inner side of the ring 203 is provided with a rotatable three-blade blade 202. The ring 203 has a support rod, and the three-blade blade 202 has a rotating shaft connected to the support rod, with a rotating component at the connection. The three-blade blade 202 is located at the center of the ring 203.

[0019] Layered filtration reduces the damage to the filter screen caused by water flow. To solve the problem of filter screen clogging, a cleaning component is provided on the outside of the first filter screen 201. The cleaning three-blade 202 is made of rubber. Under the action of water flow, the three-blade 202 rotates, thereby cleaning the filter screen. The rotation of the three-blade 202 helps the water flow to form an inward vortex, guiding the fish eggs into the guide tube 3. At the same time, the three-blade rotates on the guide tube 3, which can control the flow surface of the guide tube opening and prevent fish from entering or approaching the guide tube.

[0020] Optionally, the inner wall of cylinder 4 is coated with a substrate that mimics the growth environment of rocky reef fish. The substrate on the cylinder wall can provide an attachment medium for sticky fish eggs, supply nutrients, and improve the survival rate of the fish eggs.

[0021] After collection, the collector 1 is retrieved ashore, placed vertically with the opening facing upwards and shaken. The cover plate 13 is then opened, and the sticky fish eggs, the sticky fish eggs that are stuck together, and the scattered non-sticky eggs that are attached to the cylinder wall are collected to one side of the baffle plate 12 and discharged from the collector 1.

[0022] Example 3: See Figure 7-9 As shown, the principle of the control device's balance: A boat-shaped float is installed above the collector 1. Its balance is controlled by the relative positions of its center of gravity and center of buoyancy. In a balanced state, the center of gravity and center of buoyancy are on the same straight line, such as... Figure 7 When collector 1 becomes unbalanced, such as Figure 8 or Figure 9 Because the center of gravity and the center of buoyancy are not on the same straight line, a deflection torque is generated, which can restore the device to its original position. Figure 7 The equilibrium state shown.

[0023] The above examples are merely illustrative of the technical concept and features of the present invention and should not be construed as limiting the scope of protection of the present invention. All equivalent transformations or modifications made in accordance with the essence of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for collecting fish eggs from rocky reef fish, comprising: Collector (1), one end of the collector (1) has an opening and is provided with a guide pipe (3), characterized in that: the collector (1) includes a first cylinder and a second cylinder that are detachably connected, and a second filter screen (5) is provided at the connection between the first cylinder and the second cylinder and is inclined to the axis of the first cylinder. The first cylinder has an opening at one end and is fitted with a guide pipe (3). The other end of the first cylinder has an inclined cut. The second filter (5) is adapted to the cut. The cut extends outward with a cover plate (13). The second cylinder can be inserted into the cut and communicate with the inside of the first cylinder to form a receiving space. The guide tube (3) has a spiral structure. The first cylinder is provided with a cylinder (4) inside. The cylinder (4) is adjacent to the inner wall of the first cylinder and can rotate relative to the inner wall of the first cylinder. Under the impact of water flow, the cylinder (4) makes a circular motion so that the fish eggs are evenly distributed on the inner wall of the collector (1). The collector (1) is connected to a float (11) via a telescopic tube (9) on the outside. The float (11) is connected to two buoys (10) on both sides. The buoys (10) are plate structures.

2. The apparatus for collecting fish eggs from rocky reef fish according to claim 1, characterized in that: The second cylinder is equipped with a propeller (8).

3. The apparatus for collecting fish eggs from rocky reef fish according to claim 1, characterized in that: The second cylinder is provided with a baffle (12) inside, which can be connected and fixed to the edge of the second filter screen (5).

4. The apparatus for collecting fish eggs of rocky reef fish according to claim 3, characterized in that: The second cylinder has a built-in water pump (7), which is mounted on the side of the baffle (12). The water pump (7) is connected to a water pumping pipe (6), which is located outside the second cylinder.

5. The apparatus for collecting fish eggs from rocky reef fish according to claim 1, characterized in that: The float (11) has an open structure at one end and is recessed inward. The other end of the float (11) relative to the open structure is connected to the telescopic tube (9). The buoy (10) is located on both sides of the float (11) near the connection between the telescopic tube (9) and the float (11).

6. The apparatus for collecting fish eggs of rocky reef fish according to claim 1, characterized in that: The guide tube (3) has a built-in filter assembly (2), which includes a first filter screen (201). The first filter screen (201) has a semi-circular structure. There are at least two first filter screens (201) arranged alternately on the inner wall of the guide tube (3), and there is a gap between adjacent first filter screens (201).

7. The apparatus for collecting fish eggs of rocky reef fish according to claim 6, characterized in that: The inner wall of the inlet end of the guide pipe (3) is provided with a ring (203) fixed to its inner wall. The inner side of the ring (203) is provided with a rotatable three-blade blade (202). The ring (203) has a support rod. The three-blade blade (202) has a rotating shaft connected to the support rod, and a rotating part is provided at the connection. The three-blade blade (202) is located at the center of the ring (203).

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