Mariculture net cage

Abstract

A mariculture net cage comprises a floating body, a culture body and a driving mechanism. The breeding body comprises a breeding box frame and a protection frame which are sleeved and matched inside and outside, a breeding net is arranged on the breeding box frame, a breeding space is defined by the breeding net, and a protection net is arranged on the protection frame; the floating body is annularly arranged on the periphery of the upper portion of the breeding body. The two horizontal transverse ends of the breeding body are rotationally connected with the floating body. The driving mechanism comprises a plurality of power plates extending transversely, and the power plates are circumferentially and uniformly distributed on the culture body at intervals by taking the rotating axis of the culture body as the center; the floating body is further provided with at least one limiting pin used for limiting rotation of the breeding body. And the protection frame is arranged, so that direct impact of external large fishes on the internal culture box frame can be prevented, and a good protection effect can be achieved. The power plate is arranged, under the impact of ocean current, the part soaked in seawater can be automatically rotated to be exposed to the sea surface, the purposes of regularly drying the net and cleaning can be achieved in cooperation with the limiting pin, and fish can be conveniently collected.

Description

Technical Field

[0001] The utility model relates to the technical field of deep - sea aquaculture, in particular to an offshore aquaculture cage. Background Art

[0002] The seawater aquaculture industry is one of the most important marine pillar industries in China, and plays an important role in aspects such as national protein supply, food security guarantee, and driving the economic and social development of the coastal areas.

[0003] The continuous development of the marine aquaculture industry puts forward higher requirements for the functions and structures of aquaculture cages, or cage nets. In the marine environment, a large number of marine organisms will grow on the netting of the cage net when it is immersed in seawater for a long time. The long - term attachment of these marine organisms will cause fouling of the netting, affecting the seawater circulation. In the prior art, it is necessary to manually dry the net regularly to clean the attached marine organisms on the netting, with high cost and low efficiency.

[0004] Thus, there is a sea - fish aquaculture cage that can be lifted and rotated and its use method disclosed in Chinese Patent Application Publication No. CN111616090A; the aquaculture cage body in this solution can be rotated for drying the net under the action of the cage rotation winch to clean the attached marine organisms; however, since the cage rotation steel wires are wound around the rotation winches, the steel wires are needed to pull the aquaculture cage to rotate. Once the steel wire breaks, serious accidents will occur, which is relatively dangerous.

[0005] Moreover, a hanging bracket is provided on the structural floating body in this solution, and a lifting mechanism is installed on the hanging bracket, which can realize the vertical lifting of the aquaculture cage; to facilitate lifting the aquaculture cage to the shallow water area for fishing; however, the lifting hanging bracket erected on the structural floating body also has defects. The high - strength hanging bracket not only increases the manufacturing cost, but also is limited by the manufacturing height. Under the attack of strong typhoons, it may become the culprit for destroying the aquaculture cage.

[0006] And, the aquaculture cage body in this solution only has a fishing net on the surface, and there are no effective countermeasures for preventing fish from escaping due to a broken net and the impact of large external fish on the cage. Once the net breaks, the fish will escape, easily causing relatively large economic losses. Content of the Utility Model

[0007] The purpose of the utility model is to provide an offshore aquaculture cage, which has the functions of automatic rotation for drying the net, preventing fish from escaping due to a broken net, realizing easy fish harvesting, relatively low manufacturing cost, and being safe and reliable in use, and can avoid relatively large economic losses.

[0008] To achieve the above - mentioned purpose, the solution of the utility model is:

[0009] An offshore aquaculture cage includes a floating body, an aquaculture body, and a driving mechanism;

[0010] The breeding body includes a breeding box frame and a protection frame which are sleeved and matched inside and outside. A breeding net is arranged on the breeding box frame, and the breeding net encloses a breeding space. A protection net is arranged on the protection frame, and a protection space is formed between the protection net and the breeding net;

[0011] The floating body is arranged around the upper periphery of the breeding body, and the centers of the two horizontal ends of the breeding body are respectively rotationally connected to the floating body through suspension rods;

[0012] The driving mechanism includes a number of laterally extending power plates. Each power plate is circumferentially and evenly spaced around the rotation axis of the breeding body and is distributed on the main support rod of the breeding body. The power plate is used to drive the breeding body to rotate under the drive of the ocean current;

[0013] At least one limit pin for limiting the rotation of the breeding body is further arranged on the floating body.

[0014] Further, both the breeding box frame and the protection frame of the breeding body are cylindrical, prismatic or waist-drum-shaped; there are at least eight power plates, and they are arranged in the protection space.

[0015] Further, both the breeding box frame and the protection frame include a number of support frames and main support rods. Each support frame is horizontally and spaced apart, and each main support rod is circumferentially spaced around the center of the support frame and extends horizontally to connect the support frames into one body; the adjacent support frames inside and outside the protection frame and the breeding box frame are connected into one body through a number of frame support rods; end face frame structures are arranged on the outermost support frames at both horizontal ends of the breeding box frame, and a rotating shaft is arranged at the center of the end face frame structure. The rotating shaft is rotationally connected to the floating body through the suspension rod.

[0016] Further, the power plate is in the shape of a long strip; the length direction of the power plate is equal to the length of the main support rod, and the width direction extends along the radial direction of the breeding body.

[0017] Further, the floating body is arranged around the upper periphery of the breeding body. The floating body is in a frame shape and includes two longitudinal floating bodies respectively located on both lateral sides of the breeding body and two transverse floating bodies respectively located on both longitudinal sides of the breeding body; the longitudinal floating bodies are provided with the suspension rods extending downward; rotating shafts are respectively arranged in the middle of the two horizontal ends of the breeding body, and the rotating shafts are rotatably installed on the rotating seats, and the rotating seats are detachably connected to the lower ends of the suspension rods.

[0018] Further, a diving channel penetrating up and down is arranged at the central position of the longitudinal floating body; the suspension rod movably penetrates through the diving channel. The upper end of the suspension rod has a limit plate limited outside the upper opening of the diving channel. A hanging hook is arranged in the middle of the limit plate, and through holes are arranged on both sides of the limit plate. The through holes are used to be locked and fixed with the lock holes arranged on the floating body through fasteners.

[0019] Furthermore, limiting devices are respectively arranged at both ends of the longitudinal floating body, and the limiting pins that move horizontally are arranged on the limiting devices; a plurality of limiting holes are circumferentially spaced on the end face of the culture body, and the limiting pins are movably inserted through the limiting holes.

[0020] Furthermore, a plurality of working doors are respectively arranged at both ends of the culture body horizontally and circumferentially spaced, and the working doors communicate with the culture space; the radial distance between the working door and the axis of the culture body is not less than the radial distance between the top surface of the floating body and the axis of the culture body; the culture net and the protection net on the circumferential surface of the culture body are both detachable structures.

[0021] Furthermore, a fish collecting net is arranged in the culture space; the fish collecting net is in a sheet shape, and the four peripheral edges and the interior of the fish collecting net are respectively detachably connected to the inner wall of the culture space and are tightly attached to the inner wall of the culture space; the four peripheral edges of the fish collecting net are connected to different positions of the inner wall of the culture space, and when the interior of the fish collecting net is not connected to the inner wall of the culture space, the culture space is divided into two independent spaces with variable volumes.

[0022] Furthermore, the fish collecting net is an independent fishing net or a part of the culture net.

[0023] After adopting the above technical solution, by setting the protection frame, the direct impact of large external fish on the internal culture box frame can be prevented, and a good protection effect can be achieved; even if the culture net on the culture box frame is damaged, the escaped fish will be temporarily restricted in the protection space, and then the fish can be induced back into the culture space manually, and then the culture net can be repaired, which can avoid major economic losses. Also, since the floating body surrounds the upper part of the culture body, by lengthening the suspension rod, more than two-thirds of the lower and middle parts of the culture body can sink into the sea, increasing the culture area, and the upper part of the culture body is exposed above the sea surface, which is convenient for sunning the net, cleaning and fishing, etc.; also, by setting a plurality of power plates, when the culture body is placed, the axis of the culture body is pre-controlled to be perpendicular to the direction of the ocean current in the sea, then under the impact of the ocean current, the power plates will drive the culture body to rotate, and the part of the culture body immersed in the sea water can be automatically rotated and exposed above the sea surface, which is energy-saving and safe. And because the ocean current continuously drives the culture body to rotate, the limiting pins are set to limit the culture body to realize the rotation or stop action of the culture body, so as to expose different positions of the culture body on the water surface according to needs, so as to achieve the purpose of regular sunning the net and cleaning, and at the same time, harvesting fish will be easier and more convenient, and the sunning time of the net can be set according to actual needs. Description of the Drawings

[0024] Figure 1 It is a three-dimensional view of an embodiment of the present invention, and the culture net and the protection net are not shown;

[0025] Figure 2 Figure enlarged view of point A of Figure 1 ;

[0026] Figure 3 Figure Figure 1 top view of

[0027] Figure 4 Figure Figure 1 side view of

[0028] Figure 5 Figure Figure 1 front view of

[0029] Figure 6 Schematic diagram of the floating body of the embodiment of the present utility model;

[0030] Figure 7 Schematic diagram of the breeding box frame of the embodiment of the present utility model;

[0031] Figure 8 Schematic diagram of the protection frame of the embodiment of the present utility model;

[0032] Figure 9 Schematic diagram of the implementation state of the embodiment of the present utility model;

[0033] Figure 10 Schematic diagram of the steps of collecting fish using a fish collecting net in the embodiment of the present utility model.

[0034] Label description: breeding body 1, breeding box frame 11, protection frame 12, breeding net 13, protection net 15, support frame 17, support main rod 18, frame support rod 19, end face frame structure 20, rotating shaft 201, rotating seat 202, working door 203, limit hole 204;

[0035] Floating body 2, limit pin 21, suspension rod 22, limit plate 221, hook 222, through hole 223, diving channel 23, lock hole 24, limit device 25, longitudinal floating body 26, transverse floating body 27;

[0036] Drive mechanism 3, power plate 31, fish collecting net 4. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of rather than all of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0038] Such as Figures 1 to 9As shown in the figure, a kind of offshore aquaculture cage of this embodiment includes an aquaculture body 1, a floating body 2 and a driving mechanism 3.

[0039] The aquaculture body 1 includes an aquaculture cage frame 11 and a protection frame 12 which are sleeved and matched inside and outside. An aquaculture net 13 is arranged on the aquaculture cage frame 11, and the aquaculture net 13 encloses an aquaculture space. A protection net 15 is arranged on the protection frame 12, and a protection space is formed between the protection net 15 and the aquaculture net 13; in this embodiment, the protection net 15 is covered outside the protection frame 12, and the aquaculture net 13 is arranged inside the aquaculture cage frame 11, but it is not limited to this.

[0040] The floating body 2 is arranged around the upper periphery of the aquaculture body 1. The centers of the two horizontal ends of the aquaculture body 1 are respectively rotatably connected to the floating body 2 through suspension rods 22; the floating body 2 of this embodiment can be composed of a plurality of floating boxes connected in combination, or other floating body structures can be used as long as they can provide the buoyancy to support the floating of the aquaculture body 1.

[0041] The driving mechanism 3 includes a number of power plates 31 extending horizontally. Each power plate 31 is circumferentially and evenly spaced around the rotation axis of the aquaculture body 1 on the aquaculture body 1, and the power plate 31 is used to drive the aquaculture body 1 to rotate under the drive of ocean currents; at least one limit pin 21 for limiting the rotation of the aquaculture body 1 is also arranged on the floating body 2.

[0042] Therefore, for the aquaculture body 1 of this embodiment, due to the additional arrangement of the protection frame 12, it can prevent the direct impact of large external fish on the internal aquaculture cage frame 11 and can play a good protection role; moreover, even if the aquaculture net 13 on the aquaculture cage frame 11 is damaged, the escaped fish will be temporarily restricted in the protection space, and then the fish can be induced back into the aquaculture space manually, and then the aquaculture net 13 can be repaired to avoid major economic losses. Also, because the floating body 2 is arranged around the upper part of the aquaculture body 1 and the suspension rods are lengthened, more than two-thirds of the lower part of the aquaculture body 1 can be sunk into the sea, increasing the aquaculture area, while a small part of the upper part of the aquaculture body 1 is exposed above the sea surface, which is convenient for drying the net, cleaning and fishing, etc.; also, by arranging a number of power plates 31, when the aquaculture body 1 is placed, the axis of the aquaculture body 1 is pre-controlled to be perpendicular to the direction of the ocean current in the sea. Then, under the impact of the ocean current, the power plate 31 will be stressed to drive the aquaculture body 1 to rotate. In this way, the rotation of the aquaculture body 1 can be realized, and the part of the aquaculture body 1 soaked in the sea water can be rotated and exposed above the sea surface automatically, which is energy-saving and safe. And because the ocean current continuously drives the rotation of the aquaculture body 1, it is necessary to set the limit pin 21 to limit the aquaculture body 1 to realize the rotation or stop action of the aquaculture body 1, so as to expose and fix different positions of the aquaculture body 1 on the water surface according to needs, so as to achieve the purpose of regular net drying and cleaning. At the same time, harvesting fish will be more relaxed and convenient, and the net drying time can be set according to actual needs.

[0043] In this embodiment, the cultivation box frame 11 and the protection frame 12 of the cultivation body 1 are both cylindrical, prism-shaped, or hourglass-shaped, etc.; this embodiment will be described by taking an octagonal prism shape as an example.

[0044] Such as Figure 7 and Figure 8 , specifically, the cultivation box frame 11 and the protection frame 12 both include a number of support frames 17 and support main rods 18. Each support frame 17 is horizontally spaced apart respectively, and each support main rod 18 is circumferentially spaced with the center of the support frame 17 as the axis, and horizontally extends to connect each support frame 17 into one body; the support frames 17 adjacent to each other inside and outside the protection frame 12 and the cultivation box frame 11 are connected into one body by a number of frame struts 19.

[0045] On the outermost support frames 17 at the two horizontal ends of the cultivation box frame 11, there is an end face frame structure 20, and a rotating shaft 201 is provided at the center of the end face frame structure 20. The rotating shaft 201 is rotatably connected to the floating body 2.

[0046] The other support frames 17 between the two support frames 17 at the two horizontal ends of the cultivation box frame 11 can be made of round rods to avoid cutting the fishing net with sharp corners. In this embodiment, each support frame 17 takes five octagonal frames as an example, and each support main rod 18 can be eight round tubes, and respectively pass through the eight corners of the octagonal frame to connect the five octagonal frames into one body to form an octagonal prism structure, and three cylindrical frame struts 19 are directly provided on each side between the support frames 17 adjacent to each other inside and outside, so as to improve the overall structural stability of the cultivation body 1.

[0047] In this embodiment, there can be at least eight power plates 31, and they are arranged in the protection space to prevent damage. And setting eight power plates 31 can ensure the impact effect of ocean currents on the power plates 31. The power plate 31 can be in the shape of a long strip; the length direction of the power plate 31 is the same as the length of the support main rod 18, and the width direction extends along the radial direction of the cultivation body 1. The outer end of the power plate 31 can be directly connected to the support main rod 18 of the protection frame 12, while the inner end is spaced from the support main rod 18 of the cultivation box frame 11.

[0048] Such as Figure 6 , the floating body 2 can be in a frame shape, including two longitudinal floating bodies 26 respectively located on the two horizontal sides of the cultivation body 1 and two transverse floating bodies 27 respectively located on the two longitudinal sides of the cultivation body 1;

[0049] A suspension rod 22 extending downward is provided on the longitudinal floating body 26; the middle parts of the horizontal two ends of the aquaculture body 1 are respectively provided with the rotating shafts 201, and the rotating shafts 201 are rotatably installed on the rotating seats 202, and the rotating seats 202 are detachably connected to the lower ends of the suspension rods 22 (the detachable connection between the two can adopt the prior art, and the suspension rod 22 can adopt the I-beam steel structure). Thus, the aquaculture body 1 can rotate stably within the area surrounded by the floating body 2.

[0050] Furthermore, a diving channel 23 penetrating up and down can be provided on the longitudinal floating body 26 of the floating body 2; the suspension rod 22 is movably inserted into the diving channel 23, the upper end of the suspension rod 22 has a limiting plate 221 limited outside the upper opening of the diving channel 23, a hook 222 is provided in the middle of the limiting plate 221 for facilitating the hoisting of the aquaculture body 1; through holes 223 are provided on both sides of the limiting plate 221, and the through holes 223 are used to be locked and fixed with the locking holes 24 provided on the floating body 2 by fasteners (not shown in the figure). After the aquaculture body 1 and the floating body 2 are installed in place, bolts and other fasteners can be used to lock and fix the limiting plate 221 of the suspension rod 22 and the floating body 2 to ensure a stable rotational connection and cooperation between the aquaculture body 1 and the floating body 2 and the suspension rod 22.

[0051] Such as Figure 1 、 Figure 2 and Figure 6 As shown in, limiting devices 25 are respectively provided at both ends of the longitudinal floating body 2 of the floating body 2, and the limiting pins 21 moving horizontally are provided on the limiting devices 25; a plurality of circumferentially spaced limiting holes 204 are provided on the end face of the aquaculture body 1, and the limiting pins 21 are movably inserted through the limiting holes 204. In this embodiment, the end face of the aquaculture body 1 has an end face frame structure 20, and sixteen limiting holes 204 are circumferentially and evenly spaced at 22.5° on the end face frame structure 20. Thus, after the aquaculture body 1 rotates 22.5°, it can be positioned and fixed.

[0052] In this embodiment, two limiting devices 25 are also provided at both horizontal ends of the floating body 2, and the limiting pins 21 of the two limiting devices 25 can be inserted into two limiting holes 204 in alignment at the same time to improve the positioning effect.

[0053] And, the limiting device 25 can drive the limiting pin 21 to move through a motor, a cylinder, a hydraulic cylinder, etc., or the movement of the limiting pin 21 inserted into the limiting hole 204 can also be controlled manually.

[0054] In this embodiment, several working doors 203 are provided at both horizontal ends of the aquaculture body 1 at circumferentially spaced intervals. In this embodiment, four working doors 203 evenly spaced circumferentially are taken as an example. The working doors 203 communicate with the aquaculture space; the radial distance between the working doors 203 and the axis of the aquaculture body 1 is not less than the radial distance between the top surface of the floating body 2 and the axis of the aquaculture body 1; thus, when the working doors 203 rotate with the aquaculture body 1 and emerge above the water surface, the working doors 203 will be located above the floating body 2, facilitating the staff to walk along the floating body 2 and conveniently enter the aquaculture space through the working doors 203 for maintenance and management.

[0055] Moreover, both the aquaculture net 13 and the protection net 15 on the circumferential surface of the aquaculture body 1 are detachable structures. Therefore, when fishing is required, the protection net 15 and the aquaculture net 13 on the upper circumferential surface of the aquaculture body 1 exposed on the sea surface can be disassembled together to catch the fish inside the aquaculture space.

[0056] In order to facilitate fish collection, a fish collection net 4 is provided in the aquaculture space in this embodiment, and the fish collection net 4 has the function of driving and collecting fish.

[0057] As Figure 9 shown, specifically, the fish collection net 4 is in a sheet shape, and the four peripheral edges and the interior of the fish collection net 4 are respectively detachably connected to the inner wall of the aquaculture space and are tightly attached to the inner wall of the aquaculture space; when the four peripheral edges of the fish collection net 4 are connected to different positions on the inner wall of the aquaculture space and the interior of the fish collection net 4 is not connected to the inner wall of the aquaculture space, the aquaculture space can be longitudinally divided into two independent spaces with variable volumes.

[0058] Refer to Figure 10 and, combined with the automatic rotation of the aquaculture body 1, convenient rotational fish collection can be achieved by means of the fish collection net 4. The specific method is as follows:

[0059] Step 1: The aquaculture body 1 stops at point A. Keep the left bundling point of the fish collection net 4 at point A unmoved, loosen the other bundling points on the right one by one along the circumferential direction, stop after rotating the aquaculture body counterclockwise by 90°, then loosen the right bundling point of the fish collection net 4 from point D and re-bundle it at point E. At this time, the net-setting work of the fish collection net 4 is completed, and all the fish products are covered under the fish collection net 4;

[0060] Step 2: Rotate the aquaculture body counterclockwise by 135° again, and all the fish will be driven above the fish collection net 4;

[0061] Step 3: Open the protection net and the aquaculture net to catch the fish;

[0062] Step 4: After most of the fish have been harvested, in order to facilitate the harvesting of the remaining small portion, the chord length can be changed again. By rotating the cultivation body counterclockwise by 45°, and untying and retying the fish collection net 4 at point A to point H, the chord length of the fish collection net 4 can be shortened, further compressing the activity space of the fish.

[0063] Step 5: Rotate the cultivation body counterclockwise by 292.5° again. The remaining fish return above the fish collection net 4, and the fishing depth is reduced, making it more convenient to catch the remaining fish.

[0064] Therefore, the cultivation net cage of this embodiment can achieve convenient and fast fish harvesting work with high efficiency by setting the cultivation body 1 that can rotate with the ocean current and cooperating with the fish collection net 4 with variable chord length.

[0065] Furthermore, the fish collection net 4 can be an independent fishing net or a part of the cultivation net 13, both of which can achieve the corresponding fish harvesting effect.

[0066] In summary, for a marine cultivation net cage of the present utility model, the cultivation body 1 is rotationally connected to the floating body 2 by setting the suspension rod 22. The floating body 2 provides the buoyancy to support the cultivation body 1. The cultivation body 1 is provided with a power plate 31, which can continuously rotate in one direction under the impact of the ocean current without external force, saving resources and being safe to use. It can achieve labor-saving regular net drying and maintenance operations such as cleaning and repairing, improving the service life of the cultivation net cage. Also, by setting the protection frame 12, it effectively isolates and protects the internal cultivation cage frame 11, preventing the impact and damage of large external fish on the cultivation cage frame 11. The formed protection space can also accommodate escaped cultivated fish, allowing for timely remedial measures and reducing economic losses. At the same time, by setting the fish collection net 4 with variable chord length, cooperating with the limit pin 21, the limit hole 204 and the automatically rotating cultivation body 1, it can change the size of the independent space separated by the fish collection net 4 as the cultivation body 1 rotates, continuously compress the space of the cultivated fish, and drive them to the side close to the sea surface, facilitating fish harvesting operations. There is no need to use structures such as a hanging frame to lift the cultivation body 1 as a whole, ensuring the safety of the cultivation net cage, saving resources, having a simple structure, being easy to use, and being able to effectively harvest fish.

[0067] The above are only the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, equivalent changes and modifications made without departing from the principle of the present utility model should still fall within the protection scope of the present utility model.

[0068] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

Claims

1. An offshore aquaculture cage, characterized in that: It includes a floating body, an aquaculture body and a driving mechanism; The aquaculture body includes an aquaculture cage frame and a protection frame which are sleeved and matched inside and outside. An aquaculture net is arranged on the aquaculture cage frame, and the aquaculture net encloses an aquaculture space. A protection net is arranged on the protection frame, and a protection space is formed between the protection net and the aquaculture net; The floating body is arranged around the upper periphery of the aquaculture body, and the centers of the two horizontal ends of the aquaculture body are respectively rotatably connected to the floating body through suspension rods; The driving mechanism includes a number of laterally extending power plates. Each power plate is circumferentially and evenly spaced around the rotation axis of the aquaculture body and is distributed on the main support rod of the aquaculture body. The power plate is used to drive the aquaculture body to rotate under the drive of the ocean current; At least one limit pin for limiting the rotation of the aquaculture body is also arranged on the floating body.

2. The offshore aquaculture cage according to claim 1, characterized in that: The aquaculture cage frame and the protection frame of the aquaculture body are both cylindrical, prismatic or hourglass-shaped; there are at least eight power plates, and they are arranged in the protection space.

3. The offshore aquaculture cage according to claim 2, characterized in that: The aquaculture cage frame and the protection frame both include a number of support frames and main support rods. Each support frame is horizontally and spaced apart. Each main support rod is circumferentially spaced around the center of the support frame and extends laterally to connect the support frames into one body; the adjacent support frames inside and outside the protection frame and the aquaculture cage frame are connected into one body through a number of frame support rods; end face frame structures are arranged on the outermost support frames at both horizontal ends of the aquaculture cage frame, and a rotating shaft is arranged at the center of the end face frame structure. The rotating shaft is rotatably connected to the floating body through the suspension rod.

4. The offshore aquaculture cage according to claim 3, characterized in that: The power plate is in the shape of a long strip; the length direction of the power plate is equal to the length of the main support rod, and the width direction extends along the radial direction of the aquaculture body.

5. The offshore aquaculture cage according to claim 1, characterized in that: The floating body is arranged around the upper periphery of the aquaculture body; the floating body is in a frame shape and includes two longitudinal floating bodies respectively located on both lateral sides of the aquaculture body and two transverse floating bodies respectively located on both longitudinal sides of the aquaculture body; the suspension rods extending downward are arranged on the longitudinal floating bodies; rotating shafts are respectively arranged in the middle of the two horizontal ends of the aquaculture body, and the rotating shafts are rotatably installed on the rotating seats, and the rotating seats are detachably connected to the lower ends of the suspension rods.

6. The offshore aquaculture cage according to claim 5, wherein: A diving channel penetrating up and down is arranged at the central position of the longitudinal floating body; the suspension rod is movably inserted into the diving channel. The upper end of the suspension rod has a limit plate limited outside the upper opening of the diving channel. A hook is arranged in the middle of the limit plate, and through holes are arranged on both sides of the limit plate. The through holes are used to be locked and fixed with the lock holes arranged on the floating body through fasteners.

7. The offshore aquaculture cage according to claim 5, characterized in that: Limit devices are respectively arranged at both ends of the longitudinal floating body, and the laterally movable limit pins are arranged on the limit devices; a number of circumferentially spaced limit holes are arranged on the end face of the aquaculture body, and the limit pins are movably inserted through the limit holes.

8. The marine aquaculture cage according to claim 1, wherein: A number of circumferentially spaced working doors are respectively arranged at both horizontal ends of the aquaculture body, and the working doors communicate with the aquaculture space; the radial distance between the working door and the axis of the aquaculture body is not less than the radial distance between the top surface of the floating body and the axis of the aquaculture body; the aquaculture net and the protection net on the circumferential surface of the aquaculture body are both detachable structures.

9. The marine aquaculture cage according to claim 1, characterized in that: A fish collecting net is provided in the aquaculture space; the fish collecting net is in a sheet shape, and the four peripheral edges and the interior of the fish collecting net are respectively detachably connected to the inner wall of the aquaculture space and are tightly attached to the inner wall of the aquaculture space; the four peripheral edges of the fish collecting net are connected to different positions on the inner wall of the aquaculture space, and when the interior of the fish collecting net is not connected to the inner wall of the aquaculture space, the aquaculture space is divided into two independent spaces with variable volumes.

10. The offshore aquaculture cage according to claim 9, characterized in that: The fish collecting net is an independent fishing net or a part of the aquaculture net.

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