A fish gathering device and method suitable for deep sea net pen fish harvesting

Abstract

The application discloses a fish collecting device and method suitable for deep-sea net cage fish collecting, which comprises a breeding net cage, a fish collecting net, a plurality of floats, a plurality of sinkers, a power system, a first cable, a second cable and a third cable; the fish collecting net is arranged in the breeding net cage; the plurality of floats are connected with one end of the fish collecting net, and the plurality of sinkers are connected with the other end of the fish collecting net; the power system is connected with the floats through the first cable, and is connected with the sinkers through the second cable and the third cable which is wound around the bottom of the breeding net cage. When the fish collecting operation is performed, the power system, the third cable and the sinkers are cooperated to realize fast bottom covering; the power system, the first cable and the floats are cooperated to realize fast tightening of the upper end of the fish collecting net; and the power system, the second cable and the sinkers are cooperated to realize fast pulling up of the collected fish group. The whole fish collecting process does not need the underwater operation of divers, the safety is greatly improved, and the fish collecting efficiency can be greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of deep-sea aquaculture, and in particular to a fish collection device and method suitable for collecting fish from deep-sea cages. Background Technology

[0002] With the deterioration of nearshore habitats and the increasing demand for high-quality protein, aquaculture is gradually shifting towards deep-sea areas. Compared to nearshore aquaculture, deep-sea cage aquaculture offers advantages such as superior water quality, faster water exchange, higher oxygen levels, more active fish, firmer flesh, and overall better quality. However, the sea conditions in deep-sea areas are more challenging. The fast currents and more active fish make it difficult to directly use automated fish-collecting equipment, requiring underwater divers and posing inherent risks. This significantly hinders the development of deep-sea cage aquaculture.

[0003] Therefore, how to safely gather fish in net cages, increase the number of fish in a unit of water, and thus improve fish harvesting efficiency is of great significance to the development of deep-sea net cage aquaculture. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fish collection device suitable for deep-sea cage fish collection that can improve fish collection efficiency under safe conditions.

[0005] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0006] A fish collection device suitable for deep-sea cage fish harvesting includes an aquaculture cage, a fish collection net, multiple floats, multiple sinkers, a power system, a first cable, a second cable, and a third cable.

[0007] The fish-collecting net is placed inside the aquaculture cage;

[0008] Multiple floats are connected to one end of the fishing net, and multiple sinkers are connected to the other end of the fishing net. Without any other force acting on them, the multiple floats and multiple sinkers work together to unfold the fishing net placed in the deep sea.

[0009] The power system is connected to the float via a first cable, and to the sinker via a second cable and a third cable that wraps around the bottom of the aquaculture cage.

[0010] This technical solution utilizes a power system, a third cable, and a sinker to quickly bring the fish to the bottom during fish gathering operations. It also utilizes a power system, a first cable, and a float to quickly tighten the upper opening of the fish gathering net. Finally, it utilizes a power system, a second cable, and a sinker to quickly pull up the gathered fish. The entire fish gathering process requires no underwater work by divers, greatly improving safety and significantly increasing fish retrieval efficiency.

[0011] Furthermore, the top of the aquaculture cage is equipped with a walkway platform that extends along the edge of the top of the cage and connects end to end. The walkway platform facilitates both the operation of the power system and the handling of the fish collection net, including bottoming, tightening the top opening, and pulling it up.

[0012] Furthermore, the power system includes a hand-cranked winch and a bidirectional winch, both located on one side of the walkway platform;

[0013] The hand-cranked winch is connected to the corresponding float via a first cable;

[0014] The two winches of the bidirectional winch are respectively connected to the corresponding sinkers via a second cable and a third cable that winds around the bottom of the aquaculture cage.

[0015] Compared to traditional fish harvesting methods, using winches to pull nets can free up labor, save labor costs, and greatly improve fish harvesting efficiency.

[0016] Furthermore, the hand-cranked winches and bidirectional winches are evenly staggered along one side of the walkway platform, ensuring even force distribution during net retrieval. Additionally, the number of hand-cranked and bidirectional winches is determined based on the volume of the aquaculture cages and the size of the fish-collecting nets; the spacing between the hand-cranked and bidirectional winches is generally around 5 meters.

[0017] Furthermore, the bottom of the aquaculture cage is equipped with a fixed pulley located below the bidirectional winch. One end of the third cable is connected to a winch in the corresponding bidirectional winch, and the other end is connected to the corresponding sinker after passing through the fixed pulley. The cooperation between the fixed pulley and the third cable ensures smooth sliding of the third cable during the bottom-catching operation of the fish-collecting net, thus improving the service life of the third cable.

[0018] Furthermore, the aquaculture cage is provided with aquaculture netting around its perimeter and at its bottom to restrict the movement of the fish.

[0019] Furthermore, the walkway platform is equipped with railings at its edges to ensure the safety of aquaculture operations.

[0020] Furthermore, the width of the fish-collecting net is not less than 0.5 times the perimeter of the cross-section of the aquaculture cage, and the length of the fish-collecting net is not less than twice the depth of the aquaculture cage, so as to ensure the effectiveness of fish collection through the fish-collecting net.

[0021] To achieve the above objectives, the present invention further provides a fish collection method suitable for deep-sea cage fish harvesting, which employs the aforementioned fish collection device suitable for deep-sea cage fish harvesting, comprising:

[0022] The first cable, the second cable, and the third cable are slack.

[0023] The fish-collecting net is placed on the side of the aquaculture cage away from the power system and is deployed under the action of multiple floats and multiple sinkers;

[0024] The power system pulls the third cable, causing the corresponding sinker and the lower end of the fish collection net to move to the other side of the aquaculture cage until the bottom-catching operation is completed, and then the third cable is tightened and fixed.

[0025] The power system pulls the first cable, which drives the corresponding float and the upper end of the fish collection net to move to the other side of the aquaculture cage, continuously tightening the upper net opening until the fish in the aquaculture cage are driven to one side of the aquaculture cage, and then the first cable is tightened and fixed.

[0026] The power system pulls the second cable and simultaneously releases the third cable, thereby pulling up the corresponding sinker and the lower end of the fish-gathering net. Once the lower ends of the sinker and the fish-gathering net are both pulled out of the water, the entire fish-gathering operation is successfully completed.

[0027] Furthermore, the power system includes a hand-cranked winch and a bidirectional winch, both located on one side of the walkway platform;

[0028] The first cable is pulled and released by a hand-cranked winch;

[0029] The second and third cables are pulled and released by a bidirectional winch.

[0030] Compared with existing technologies, the principles and advantages of this solution are as follows:

[0031] Multiple floats are connected to one end of the fish-gathering net, and multiple sinkers are connected to the other end. Without any other force, the floats and sinkers work together to deploy the net in the deep sea. The power system is connected to the floats via a first cable, and to the sinkers via a second cable and a third cable that wraps around the bottom of the aquaculture cage. During fish gathering, the power system, the third cable, and the sinkers work together to quickly scoop the fish to the bottom; the power system, the first cable, and the floats work together to quickly tighten the top opening of the net; and the power system, the second cable, and the sinkers work together to quickly pull up the gathered fish. The entire fish gathering process requires no underwater work by divers, greatly improving safety and significantly increasing fish retrieval efficiency. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the services required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description 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.

[0033] Figure 1This is a schematic diagram of a fish collection device for deep-sea cage fish collection, as described in this invention, installed on a support base;

[0034] Figure 2 This is a top view schematic diagram of a fish collection device suitable for collecting fish from deep-sea cages according to the present invention;

[0035] Figure 3 This is a schematic diagram of a fish collection device for deep-sea cage fish collection in the non-working state.

[0036] Figure 4 A schematic diagram illustrating the bottom-catching process achieved by a fish-collecting device suitable for deep-sea cage fish collection according to the present invention;

[0037] Figure 5 A schematic diagram illustrating the tightening of the upper opening of the fish collection net using a fish collection device suitable for deep-sea cage fish collection according to the present invention;

[0038] Figure 6 This is a schematic diagram of a fish-collecting device for deep-sea cage fish collection, which is applicable to the present invention, for raising a fish-collecting net.

[0039] Figure label:

[0040] 1-Aquaculture cage; 2-Fish collection net; 3-Float; 4-Sinker; 5-First cable; 6-Second cable; 7-Third cable; 8-Walkway platform; 9-Hand-cranked winch; 10-Double winch; 11-Fixed pulley; 12-Aquaculture netting. Detailed Implementation

[0041] The present invention will be further described below with reference to specific embodiments:

[0042] like Figures 1 to 2 As shown in the figure, the fish collection device for deep-sea cage fish collection described in this embodiment includes an aquaculture cage 1, a fish collection net 2, multiple floats 3, multiple sinkers 4, a power system, a fixed pulley 11, a first cable 5, a second cable 6, and a third cable 7.

[0043] The aquaculture cage 1 is installed on a support base A and fixed in the deep sea by the support base A. The aquaculture cage 1 is provided with aquaculture netting 12 around its perimeter and bottom to restrict the movement range of the fish.

[0044] The top of the aquaculture cage 1 is equipped with a walkway platform 8, which extends along the edge of the top of the aquaculture cage 1 and connects end to end. In addition, the edge of the walkway platform is equipped with railings to ensure the safety of aquaculture operations.

[0045] The power system includes a hand-cranked winch 9 and a bidirectional winch 10, both located on one side of the walkway platform 8. The hand-cranked winch 9 and the bidirectional winch 10 are evenly staggered along that side of the walkway platform 8, with a spacing of 5 meters between them. The fixed pulley 11 is located at the bottom of the aquaculture cage 1 and below the bidirectional winch 10.

[0046] Fish collection net 2 is placed inside aquaculture cage 1; the width of fish collection net 2 is equal to 0.5 times the perimeter of the cross-section of aquaculture cage 1, and the length of fish collection net 2 is equal to twice the depth of aquaculture cage 1.

[0047] Multiple floats 3 are connected to one end of the fish-collecting net 2, and multiple sinkers 4 are connected to the other end of the fish-collecting net 2. Without the action of other forces, the multiple floats 3 and multiple sinkers 4 work together to unfold the fish-collecting net 2 placed in the deep sea.

[0048] The hand-cranked winch 9 is connected to the corresponding float 3 via the first cable 5; the two winches of the bidirectional winch 10 are respectively connected to the corresponding sinkers 4 via the second cable 6 and the third cable 7 that winds around the bottom fixed pulley 11 of the aquaculture net cage 1.

[0049] The working principle of this embodiment is as follows:

[0050] S1. The first cable 5, the second cable 6 and the third cable 7 are slack by operating the power system.

[0051] S2. The fish-collecting net 2 is placed on the side of the aquaculture cage 1 away from the power system, and unfolded under the action of multiple floats 3 and multiple sinkers 4, such as Figure 3 As shown;

[0052] S3. By pulling the third cable 7 using the bidirectional winch 10, the corresponding sinker 4 and the lower end of the fish-collecting net 2 are moved to the other side of the aquaculture cage 1 (the side equipped with the power system) until the bottom-catching operation is completed. Then, tighten and secure the third cable 7. Figure 4 As shown;

[0053] S4. By pulling the first cable 5 with the hand-cranked winch 9, the corresponding float 3 and the upper end of the fish-collecting net 2 are moved to the other side of the aquaculture cage 1, continuously tightening the upper net opening until the fish in the aquaculture cage 1 are driven to one side of the aquaculture cage 1. Then, tighten and fix the first cable 5. Figure 5 As shown;

[0054] S5. By pulling the second cable 6 with the bidirectional winch 10 and simultaneously releasing the third cable 7, the lower ends of the corresponding sinker 4 and the fish-collecting net 2 are pulled upwards, as shown. Figure 6 As shown, the entire fish-gathering operation is successfully completed when the lower ends of sinker 4 and fish-collecting net 2 are both pulled out of the water.

[0055] Once the entire fish collection process is completed, the fish can be collected using an automatic fish suction device, or they can be directly hoisted onto the boat using a crane on the fishing vessel.

[0056] In this embodiment, multiple floats 3 are connected to one end of the fish-collecting net 2, and multiple sinkers 4 are connected to the other end of the fish-collecting net 2. Without any other force, the multiple floats 3 and multiple sinkers 4 work together to unfold the fish-collecting net 2, which is placed in the deep sea. The power system is connected to the floats 3 via a first cable 5, and to the sinkers 4 via a second cable 6 and a third cable 7 that wraps around the bottom of the aquaculture cage 1. During fish collection, the power system, the third cable 7, and the sinkers 4 work together to quickly scoop the fish to the bottom; the power system, the first cable 5, and the floats 3 work together to quickly tighten the upper opening of the fish-collecting net 2; and the power system, the second cable 6, and the sinkers 4 work together to quickly pull up the collected fish. The entire fish collection process does not require underwater work by divers, greatly improving safety, and the efficiency of fish collection is also significantly improved.

[0057] The hand-cranked winch 9 and the bidirectional winch 10 are evenly staggered along one side of the walkway platform 8, which ensures that the force is evenly distributed when the net is retrieved. In addition, the number of hand-cranked winches 9 and bidirectional winches 10 is determined according to the volume of the aquaculture cage 1 and the size of the fish collection net 2.

[0058] By using the fixed pulley 11 in conjunction with the third cable 7, the third cable 7 can be smoothly slid during the bottom-catching operation of the fish-collecting net 2, thus improving the service life of the third cable 7.

[0059] The width of the fish-collecting net 2 is not less than 0.5 times the perimeter of the cross-section of the aquaculture cage 1, and the length of the fish-collecting net 2 is not less than twice the depth of the aquaculture cage 1, so that the effect of collecting fish through the fish-collecting net 2 is guaranteed.

[0060] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, any changes made in accordance with the shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for collecting fish from deep-sea cages, characterized in that, This method employs a fish-gathering device suitable for deep-sea cage fish harvesting. The device includes a culture cage, a fish-gathering net, multiple floats, multiple sinkers, a power system, fixed pulleys, a first cable, a second cable, and a third cable. The top of the culture cage is equipped with a walkway platform. The power system includes multiple hand-cranked winches and multiple bidirectional winches, all located on one side of the walkway platform, evenly staggered along the walkway platform. The fixed pulleys are located at the bottom of the culture cage and below the bidirectional winches. The fish-gathering net is placed inside the culture cage, and multiple floats are connected to one end of the net. One sinker is connected to the other end of the fish-collecting net. Without any other force, multiple floats and sinkers work together to deploy the fish-collecting net in the sea. The hand-cranked winch is connected to the corresponding float via the first cable. The two winches of the bidirectional winch are respectively connected to the corresponding sinkers via a second cable and a third cable wound around the fixed pulley. The hand-cranked winch is used to pull and release the first cable; the bidirectional winch is used to pull and release the second and third cables. The width of the fish-collecting net is not less than 0.5 times the perimeter of the cross-section of the aquaculture cage, and the length of the fish-collecting net is not less than twice the depth of the aquaculture cage. The method includes the following steps: S1. By operating the power system, the first cable, the second cable, and the third cable are brought to a slack state. S2. Arrange the fish-collecting net on the side of the aquaculture cage away from the power system, and make the fish-collecting net unfold under the action of the multiple floats and the multiple sinkers; S3. By pulling the third cable through the bidirectional winch, the corresponding sinker and the lower end of the fish collection net are moved to the other side of the aquaculture cage until the bottom-catching operation is completed. Then, the third cable is tightened and fixed. The other side of the aquaculture cage is the side equipped with the power system. S4. Pull the first cable by the hand-cranked winch, which will move the corresponding float and the upper end of the fish collection net to the other side of the aquaculture cage, and continuously tighten the upper net opening until the fish in the aquaculture cage are driven to one side of the aquaculture cage. Then tighten and fix the first cable. S5. The second cable is pulled by the bidirectional winch and the third cable is released simultaneously, thereby pulling up the corresponding sinker and the lower end of the fish-collecting net. When the sinker and the lower end of the fish-collecting net are both pulled out of the water, the entire fish-collecting operation is completed. During the fish gathering operation, the power system, the third cable, and the sinker work together to quickly scoop the fish to the bottom; the power system, the first cable, and the float work together to quickly tighten the upper opening of the fish gathering net; and the power system, the second cable, and the sinker work together to quickly pull up the gathered fish.

2. The fish collection method applicable to deep-sea cage fish harvesting according to claim 1, characterized in that, The walkway platform extends along the edge of the top of the aquaculture cages and connects end to end.

3. The fish collection method applicable to deep-sea cage fish harvesting according to claim 1, characterized in that, The aquaculture cages are equipped with aquaculture netting around their sides and bottom to restrict the movement of the fish.

4. A fish collection method suitable for deep-sea cage fish harvesting according to claim 2, characterized in that, The walkway platform is equipped with railings along its edges.

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