An open-type aquaculture tank and a method for collecting fish

Abstract

This invention aims to provide a simple, non-enclosed aquaculture chamber and fish-collecting method. The fish-collecting net is lowered from the side of the aquaculture net, and the bottom is closed during fish collection, concentrating all fish within the net and allowing for adjustment to a suitable height. This results in higher fish-collecting efficiency. The non-enclosed aquaculture chamber includes an aquaculture frame, a fish-collecting net, and a rope-retrieving assembly. The aquaculture frame is positioned at the top of an external aquaculture chamber, and the fish-collecting net is positioned inside the aquaculture frame, conforming to the shape of the inner side of the external aquaculture chamber. The rope-retrieving assembly includes a closing rope and two sets of lifting ropes. The bottom of the fish-collecting net has a closing section, with the closing rope connected to the closing section. The two sets of lifting ropes are connected to both sides of the closing rope. An external crane drives the two sets of lifting ropes upwards, closing the closing section and raising the bottom of the fish-collecting net. A fish-suction assembly at the top of the aquaculture frame transfers the live fish within the fish-collecting net. This fish-collecting method utilizes the non-enclosed aquaculture chamber. This invention applies to the technical field of aquaculture chambers.

Description

Technical Field

[0001] This invention relates to the technical field of aquaculture tanks, and particularly to a non-enclosed aquaculture tank and a method for collecting fish. Background Technology

[0002] Aquaculture tanks are divided into enclosed and non-enclosed types. Non-enclosed aquaculture tanks (such as truss cages) have their aquaculture water directly connected to the outside world, making it impossible to collect and harvest fish by draining seawater from the tank. The traditional solution is to adjust the ballast water system to raise the aquaculture equipment, thereby reducing the water volume and collecting fish. However, if there are many aquaculture tanks, this solution has a significant impact on the tanks that do not require fish harvesting, and it is also costly.

[0003] The original plan for the "Bay Area Lingding" aquaculture tank involved laying a fish-collecting net at the bottom of the tank and then lifting it upwards from all sides to collect the fish. However, because the hatch opening was much smaller than the water surface area of ​​the aquaculture tank, tests showed that after the net was lowered from the deck to the tank, it couldn't create a sufficient area for fish to be collected at the bottom. Fish escaped from the sides, resulting in a very low collection rate and efficiency. Furthermore, the fish suction pump couldn't be inserted into the tank to collect the fish. If a simple, non-enclosed aquaculture tank and fish-collecting method could be designed, with the lower end of the net lowered against the side of the aquaculture tank and the opening closed at the bottom during collection, concentrating all the fish within the net and adjustable to a suitable height, thus achieving higher collection efficiency, the above problems could be solved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a non-enclosed aquaculture tank and fish collection method with a simple structure, in which the lower end of the fish collection net is attached to the aquaculture net from the side, the opening is closed at the bottom when collecting fish, all fish are concentrated in the fish collection net and the height can be adjusted to a suitable height, and the fish collection efficiency is higher.

[0005] The technical solution adopted in this invention is as follows: This invention includes a breeding frame, a fish-collecting net, and a rope-retrieving assembly. The breeding frame is set at the upper end of the external breeding chamber, and the fish-collecting net is set inside the breeding frame and conforms to the inner side of the external breeding chamber. The rope-retrieving assembly includes a closing rope and two sets of lifting ropes. The bottom of the fish-collecting net is provided with a closing opening, and the closing rope is connected to the closing opening. The two sets of lifting ropes are respectively connected to both sides of the closing rope. An external crane drives the two sets of lifting ropes to rise, thereby closing the closing opening and raising the bottom of the fish-collecting net. The fish-suction assembly at the upper end of the breeding frame transfers the live fish in the fish-collecting net.

[0006] Furthermore, guide rollers are provided on both sides of the upper end of the breeding frame, and the two sets of lifting ropes are arranged alternately and cooperate with the closing rope through the corresponding guide rollers.

[0007] Furthermore, the upper end of the fish-collecting net is provided with several floats, and the buoyancy provided by the several floats is greater than the overall weight of the fish-collecting net.

[0008] Furthermore, a counterweight chain is provided at the lower end of the fish-collecting net.

[0009] Furthermore, the fish suction assembly includes a fish suction pump, a fish suction pipe, and a transport vessel. The fish suction pump transfers the fish in the fish collection net to the transport vessel through the fish suction pipe.

[0010] Furthermore, the upper end of the aquaculture frame is provided with several sets of auxiliary ropes, which drive the edge of the fish-collecting net to fit against the inner wall of the outer aquaculture chamber.

[0011] The fish collection method includes the following steps; S1. Folding the net: Fold the bottom edge of the fishing net upwards. After folding, the bottom edge of the fishing net should be inside the top edge. Except for the bottom and top edges, the net in the middle of the fishing net is folded into a cylindrical shape and tied with a rope to form a slipknot. Later, the slipknot needs to be quickly loosened and the net lowered. Then fold it into layers or more for easy hoisting. S2, launching the fish collection net: The folded fish collection net is lifted into the aquaculture frame by a crane. Workers ride in rubber boats, untie the buckle ropes of the fish collection net, and spread the fish collection net out on the water surface. The rubber boat is used to push the fish collection net close to the surrounding aquaculture nets to carry out the fish collection net laying work. S3. Hanging the fish collection net: Hang the fish collection net one by one along the upper edge of the ring onto the support rod hook of the breeding frame, and unfold it in sequence around the breeding cabin until it is full. Pass the bottom auxiliary rope of the fish collection net through the pulley or ring structure on the support rod and lead it to the deck surface for later use. S4. Lowering the fish-collecting net: Loosen the slipknot binding rope of the fish-collecting net, and then arrange for multiple workers on the deck to operate the lowering auxiliary rope to lower the bottom edge of the fish-collecting net to the bottom of the hold at a uniform speed and synchronously. After the four axes of the fish-collecting net are lowered, a cylinder will be formed, ensuring that no fish leak out from the four sides. If the auxiliary rope is not needed, you can test whether the net can fall freely under the weight of the chain. S5. Tighten and secure the bottom opening: The diver connects one end of the closing rope to the guide roller at the bottom of the tank via the lifting rope, and fixes the other end to the diagonal structure. The lifting rope on the pulley is tightened by the winch, and the bottom opening of the fish-collecting net will gradually close until it is completely sealed, so that no fish can leak out of the bottom. S6. Fish collection upwards: Use an additional rope to tighten the bottom edge of the fish collection net to ensure the bottom is closed and fish do not escape. Use a crane to lift the lifting rope upwards and start collecting fish through the fish suction component.

[0012] The beneficial effects of this invention are as follows: The upper end of the fish-collecting net is fixed to the steel structure of the aquaculture frame, while the lower end is lowered from the side against the aquaculture net. During fish collection, the bottom is closed, ensuring all fish are concentrated within the net. The net is then pulled up to a suitable height from the bottom, and the suction pipe can be easily inserted into the aquaculture tank from outside, utilizing a fish-suction pump to increase efficiency. This minimizes fish escape, increases the single-pass capture rate, significantly saves time at sea, avoids the enormous energy consumption of raising and lowering the vessel, and simplifies operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure in the second state of the present invention; Figure 3 This is a structural schematic diagram of the third state of the present invention; Figure 4 This is a structural schematic diagram from another perspective of the present invention; Figure 5 This is a schematic diagram of the structure of the fish-collecting net; Figure 6 This is a schematic diagram of the folded state of the fish-collecting net. Detailed Implementation

[0014] like Figures 1 to 6 As shown, in this embodiment, the present invention includes a breeding frame 1, a fish-collecting net 2, and a rope-retrieving assembly 3. The breeding frame 1 is located at the upper end of the external breeding chamber. The fish-collecting net 2 is located inside the breeding frame 1 and conforms to the inner side of the external breeding chamber. The rope-retrieving assembly 3 includes a closing rope 31 and two sets of lifting ropes 32. The bottom of the fish-collecting net 2 has a closing opening 4, and the closing rope 31 is connected to the closing opening 4. The two sets of lifting ropes 32 are respectively connected to both sides of the closing rope 31. An external crane drives the two sets of lifting ropes 32 to rise, closing the closing opening 4 and raising the bottom of the fish-collecting net 2. The fish-suction assembly 5 at the upper end of the breeding frame 1 transfers the live fish in the fish-collecting net 2. Thus, the upper end of the fish-collecting net 2 is fixed to the steel structure of the breeding frame 1, and the lower end is lowered from the side along the breeding net. The fish swim into the fish-collecting net 2 through the closing opening 4. When collecting the fish, the bottom closing opening concentrates all the fish into the fish-collecting net. Then, the fish-collecting net is pulled up from the bottom to a suitable height, and the fish suction pipe can be easily inserted into the aquaculture tank from outside, using a fish suction pump to improve efficiency. This minimizes the risk of fish escaping, increases the capture rate in a single operation, greatly saves time at sea, avoids the huge energy consumption of raising and lowering the vessel, and is relatively easy to operate.

[0015] like Figures 1 to 3As shown, in this embodiment, guide rollers 6 are provided on both sides of the upper end of the breeding frame 1, and the two sets of lifting ropes 32 are arranged alternately and cooperate with the closing rope 31 through the corresponding guide rollers 6. It can be seen that the guide rollers 6 are used to guide the lifting ropes 32.

[0016] like Figure 5 As shown, in this embodiment, the upper end of the fish-collecting net 2 is provided with several floats 7, and the buoyancy provided by the floats 7 is greater than the overall weight of the fish-collecting net 2. Therefore, the floats 7 can prevent the edges of the fish-collecting net 2 from falling into the water and causing fish to escape.

[0017] like Figure 5 As shown, in this embodiment, a counterweight chain 8 is provided at the lower end of the fish-collecting net 2. Therefore, the counterweight chain 8 allows the bottom of the fish-collecting net 2 to fall stably to the bottom of the aquaculture tank.

[0018] like Figure 1 As shown, in this embodiment, the fish suction assembly 5 includes a fish suction pump 51, a fish suction pipe 52, and a transport vessel 53. The fish suction pump 51 transfers the fish in the fish collection net 2 to the transport vessel 53 through the fish suction pipe 52. Therefore, the fish suction assembly 5 transfers the fish from the fish collection net.

[0019] like Figures 1 to 3 As shown, in this embodiment, the upper end of the aquaculture frame 1 is provided with several sets of auxiliary ropes 9, which drive the edge of the fish-collecting net 2 to adhere to the inner wall of the outer aquaculture chamber. Therefore, the auxiliary ropes 9 enable the fish-collecting net 2 to stably adhere to the inner wall of the outer aquaculture chamber as it descends.

[0020] Working principle of the invention: S1, Net folding: Fold the bottom edge of the fish-collecting net 2 upwards, ensuring the bottom edge of the net 2 is inside the top edge. Except for the bottom and top edges, the middle section of the net 2 is folded into a cylindrical shape and tied with a rope to form a slipknot. The slipknot needs to be quickly loosened later to lower the net. Fold it into 4 layers or more for easy lifting. S2, Fish-collecting net launching: Use a crane to lift the folded fish-collecting net 2 into the aquaculture frame 1. Workers ride in rubber boats, untie the snap-locking ropes of the fish-collecting net 2, and spread the fish-collecting net 2 out on the water surface. They then use the rubber boat to push the fish-collecting net closer to the surrounding aquaculture nets to begin laying the net. S3, Hanging the fish-collecting net: The upper edge of the fish-collecting net 2 is hung one by one along the ring onto the support rod hook of the aquaculture frame 1, proceeding sequentially around the perimeter of the aquaculture pod until it is fully hung. The bottom auxiliary rope of the fish-collecting net 2 is then passed through the pulley or ring structure on the support rod to guide... S4. Lowering the Fish-Gathering Net: Loosen the snap-locked rope of the fish-gathering net 2, and then arrange for multiple workers on the deck to operate the lowering auxiliary rope 9, so that the bottom edge of the fish-gathering net 2 is lowered to the bottom of the hold at a uniform speed. After the fish-gathering net 2 is lowered on all four axes, it will form a cylinder, ensuring that no fish leaks out from all sides. If the auxiliary rope 9 is not needed, you can test whether the net can fall freely under the weight of the chain; S5. Tightening and tying the bottom: The diver connects one end of the closing rope 31 to the guide roller 6 on the bottom of the hold through the lifting rope 32, and fixes the other end to the diagonal structure. Use the winch to tighten the lifting rope 32 on the pulley. The bottom closing 4 of the fish-gathering net 2 will gradually close until it is completely closed, so that no fish leaks out from the bottom; S6. Collecting fish upwards: Use an additional rope to re-tie the bottom edge of the fish-gathering net 2, so that the bottom opening is tightly closed and no fish escape. Use a crane to lift the lifting rope 32 upwards, and start collecting fish through the fish suction assembly 5.

[0021] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.

Claims

1. A non-enclosed aquaculture cabin, comprising an aquaculture frame (1), a fish collection net (2), and a rope-reeling assembly (3), characterized in that: The breeding frame (1) is set at the upper end of the external breeding chamber. The fish collection net (2) is set inside the breeding frame (1) and conforms to the shape of the inner side of the external breeding chamber. The rope-reeling assembly (3) includes a drawstring rope (31) and two sets of lifting ropes (32). The bottom of the fish collection net (2) is provided with a drawstring (4). The drawstring rope (31) is connected to the drawstring (4). The two sets of lifting ropes (32) are respectively connected to both sides of the drawstring rope (31). The external crane drives the two sets of lifting ropes (32) to rise, so that the drawstring (4) closes and the bottom of the fish collection net (2) rises. The fish suction assembly (5) at the upper end of the breeding frame (1) transfers the live fish in the fish collection net (2).

2. The non-enclosed aquaculture chamber according to claim 1, characterized in that: The breeding frame (1) is provided with guide rollers (6) on both sides of the upper end. The two sets of lifting ropes (32) are arranged in an alternating manner and cooperate with the closing rope (31) through the corresponding guide rollers (6).

3. The non-enclosed aquaculture chamber according to claim 1, characterized in that: The upper end of the fish-collecting net (2) is provided with several floats (7), and the buoyancy provided by the several floats (7) is greater than the overall weight of the fish-collecting net (2).

4. The non-enclosed aquaculture chamber according to claim 1, characterized in that: The lower end of the fish-collecting net (2) is equipped with a counterweight chain (8).

5. The non-enclosed aquaculture chamber according to claim 1, characterized in that: The fish suction assembly (5) includes a fish suction pump (51), a fish suction pipe (52), and a transport vessel (53). The fish suction pump (51) transfers the fish in the fish collection net (2) to the transport vessel (53) through the fish suction pipe (52).

6. The non-enclosed aquaculture chamber according to claim 1, characterized in that: The upper end of the breeding frame (1) is provided with several sets of auxiliary ropes (9), and the several sets of auxiliary ropes (9) drive the edge of the fish collection net (2) to fit along the inner wall of the outer breeding chamber.

7. A method for collecting fish, which utilizes a non-enclosed aquaculture tank as described in any one of claims 1 to 6, characterized in that, It includes the following steps: S1. Folding the net: Fold the bottom edge of the fishing net (2) upwards. After folding, the bottom edge of the fishing net (2) should be inside the top edge. Except for the bottom edge and the top edge, the net in the middle of the fishing net (2) is folded up to form a cylinder. Tie it with a rope to form a slipknot. Later, the slipknot needs to be loosened quickly to lower the net. Then fold it into 4 layers or more for easy hoisting. S2, launching the fish collection net: The folded fish collection net (2) is lifted into the breeding frame (1) by a crane. The staff rides a rubber boat, unties the buckle of the fish collection net (2) and spreads the fish collection net (2) on the water surface. The rubber boat pushes the fish collection net to get it close to the surrounding breeding nets and carries out the fish collection net laying work. S3. Hanging the fish collection net: Hang the upper edge of the fish collection net (2) along the ring one by one onto the support rod hook of the breeding frame (1), and unfold it in sequence around the breeding cabin until it is full. Pass the bottom auxiliary rope of the fish collection net (2) through the pulley (or ring) structure on the support rod and lead it to the deck surface for use. S4. Lowering the fish-collecting net: Loosen the snap rope of the fish-collecting net (2), and then arrange for multiple workers to operate the lowering of the auxiliary rope (9) on the deck surface so that the bottom edge of the fish-collecting net (2) is lowered to the bottom of the cabin at a uniform speed. After the four-axis lowering of the fish-collecting net (2) is completed, it will form a cylinder, ensuring that no fish leaks out from all sides. If the auxiliary rope (9) is not needed, you can test whether the net can fall freely under the action of the chain gravity. S5. Tighten and tie the bottom: The diver connects one end of the closing rope (31) to the guide roller (6) at the bottom of the tank through the lifting rope (32), and fixes the other end to the diagonal structure. The lifting rope (32) on the pulley is tightened by the winch. The bottom closing (4) of the fish collection net (2) will gradually close until it is completely closed, so that no fish can be leaked from the bottom. S6. Fish gathering upwards: Use an extra rope to tighten the bottom edge of the fish gathering net (2) so that the bottom opening is closed and the fish cannot escape. Use a crane to lift the lifting rope (32) upwards and start collecting fish through the fish suction component (5).

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