A modular gravity cage oyster raft

Abstract

The present invention relates to a modular gravity cage oyster raft, which includes a floating raft assembly, a cage frame assembly and oyster cages; the floating raft assembly includes a truss and connecting pipes, and a plurality of the connecting pipes are connected inside the truss, and a plurality of floating raft units arranged in a rectangular array are enclosed between the connecting pipes and the truss and / or between the plurality of connecting pipes; the cage frame assembly includes a frame and floats, and a plurality of the floats are fixedly arranged below the frame, and a plurality of the cage frame assembly are respectively detachably connected to at least one of the floating raft units; a plurality of the oyster cages are hung on the frame for oyster farming. The present invention sets the oyster raft as three separable modules, so as to facilitate the operation of the workboat in units, reduce the workload of farmers, and improve the efficiency and safety of installing or harvesting oyster cages. By arranging floats on each cage frame assembly, the downward pressure of the cage frame assembly on the floating raft assembly is reduced, and the buoyancy, service life and wave resistance of the oyster raft are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of marine aquaculture equipment, and in particular to a modular gravity cage oyster raft. Background Art

[0002] Oysters, generally also known as oysters, are the world's largest cultured shellfish and one of the important marine biological resources available to humans, with a global distribution. Oysters not only have delicious meat and rich nutrition, but also have unique health care functions and medicinal values, and are a high-value marine delicacy.

[0003] With the development of the aquaculture industry, oyster farming devices have gradually changed from traditional cement pile insertion and shed-frame farming to pile-raft hanging culture, floating rope hanging culture, and floating raft (floating pontoon) hanging culture, which not only improves the oyster farming efficiency but also reduces the farming cost. Pile-raft hanging culture is affected by the ebb and flow of the tide, and the actual daily working time at sea is only half a day. Usually, farmers need to go to sea in the middle of the night, and after arriving at the beach, they have to wait for the sea water to ebb to a suitable position before they can start working, which is very cumbersome. In floating rope hanging culture, PE floating balls and inflatable floating balls are used as floating objects, and several floating balls are tied to the cable, and oyster strings are used for oyster farming. In floating raft hanging culture, the floating raft uses foam as the floating object, and a bamboo and wood frame is built to form an oyster raft, and oyster strings are used for oyster farming. However, PE floating balls, inflatable floating balls, and foam floating balls are prone to problems such as aging and damage during use, thus releasing microplastics into the ocean and causing long-term pollution to the marine ecological environment. Bamboo and wood materials are prone to cracking and breaking under long-term seawater immersion and sunlight exposure, resulting in damage to the farming framework and causing economic losses to farmers.

[0004] In addition, due to the continuous expansion of the oyster farming scale in recent years but the limited area of coastal shallow waters, it has become difficult for plankton to meet the demand for oyster seedlings, and oyster farming has started to develop towards deep-sea farming. Since the coastal areas have strong winds and waves, deep-sea farming mainly uses floating raft farming, which has slightly better wave resistance than other farming modes. However, the existing floating rafts still have deficiencies in wave resistance performance. Especially when encountering typhoon weather, the floating rafts are easily slapped by the huge waves caused by the typhoon and impacted by the underwater undercurrents caused by the typhoon, resulting in the floating rafts falling apart. Once the floating rafts fall apart, the oyster seedlings hanging at the bottom will be lost in the sea, which will cause huge losses to farmers. Moreover, bamboo floating rafts have poor durability and low reuse rate. The disintegration of bamboo floating rafts results in a large amount of floating and non-decomposable foam floating balls and rotten bamboo and wood on the sea surface, causing a greater impact on the marine environment.

[0005] Based on the bamboo floating raft, the prior art discloses a floating raft, see Figure 1, the floating raft includes a horizontal base pipe 1, a vertical base pipe 2 and oyster raft rods 3. A number of horizontal base pipes 1 are arranged at intervals along the first direction of the floating raft. The two vertical base pipes 2 enclose the number of horizontal base pipes 1 in the second direction to form a closed rectangle. The two ends of the horizontal connecting pipe 1 and the vertical connecting pipe 2 are sealed with end caps. A number of pipe sleeves are provided on the number of horizontal base pipes 1. A plurality of oyster raft rods 3 pass through the pipe sleeves and are connected to the horizontal base pipes 1. The oyster raft rods 3 are provided with a number of groove sections for hanging oyster strings. The horizontal base pipes 1, the vertical base pipes 2 and the oyster raft rods 3 are made of plastic. A number of buoyancy mechanisms 4 are arranged at the bottoms of the horizontal base pipes 1 and the vertical base pipes 2. When using this floating raft for oyster farming, farmers need to hang oyster strings on the floating raft one by one on the sea surface, which is inefficient, the working environment is dangerous, and it is very difficult to observe the growth state of oysters during the floating raft farming period, and diseases cannot be discovered and treated in time. In addition, although the strength of the above floating raft is improved compared with that of the bamboo floating raft, there are still problems that the strength of the floating raft is insufficient, the amount of oysters cultured is small, and the oyster yield per unit area is limited. If you want to increase the oyster yield, you can increase the number of floating rafts. However, dispersedly fixing a number of the above floating rafts on the sea will occupy a large sea area and the cost is relatively high. In addition, if the size of the floating raft is increased to increase the oyster yield, it will cause the overall gravity of the floating raft to increase, and as the floating raft increases, the number of oyster strings hung on the floating raft also increases significantly, resulting in a significant increase in the force on the floating raft, making the base pipes and oyster raft rods made of plastic more likely to deform and break, and even causing the oyster strings to be lost. Moreover, since the floating raft is fixed in the sea as a whole, once the floating raft is damaged, the oyster strings at the corresponding position need to be lifted out of the sea surface, the floating raft is repaired and then the oyster strings are hung back on the floating raft, which is very troublesome, and the repair process needs to be carried out on the sea surface, which is relatively dangerous. If the strength of the floating raft is increased, for example, the material of the floating raft is changed to steel or other materials, although the strength of the floating raft can meet the requirements, it will cause the overall gravity of the floating raft to increase significantly, and the requirement for buoyancy will also increase accordingly. In addition, the steel floating raft immersed in seawater for a long time has the disadvantages of easy corrosion, environmental pollution, limited anti-wave ability and high maintenance cost. Therefore, how to improve the strength, buoyancy, service life and anti-wave performance of the deep-sea oyster raft on the basis of ensuring the buoyancy of the deep-sea oyster raft is a technical problem that needs to be solved urgently. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a modular gravity cage oyster raft.

[0007] The present invention is realized through the following technical solutions: A modular gravity cage oyster raft, comprising a floating raft assembly, a cage frame assembly, and oyster cages; the floating raft assembly includes a truss and connecting pipes, and a plurality of the connecting pipes are connected inside the truss, and a plurality of floating raft units arranged in a rectangular array are enclosed between the connecting pipes and the truss and / or between the plurality of connecting pipes; the cage frame assembly includes a frame and floats, and a plurality of the floats are fixedly arranged below the frame, and a plurality of the cage frame assemblies are respectively detachably connected to at least one of the floating raft units; a plurality of the oyster cages are hung on the frame for oyster farming.

[0008] Compared with the prior art, the modular gravity cage oyster raft provided by the present invention is set as three separable modules: oyster cages, cage frame assemblies, and floating raft assemblies. When installing and harvesting oysters, the workboat can operate in units, installing or harvesting the oyster cages and the cage frame assemblies as a whole, thereby reducing the number and difficulty of hoisting, and at the same time avoiding the farmers from fixing the oyster cages on the floating raft one by one on the pedal, improving the efficiency and safety of the operation and reducing the workload of the farmers; the separable cage frame assemblies facilitate the farmers to maintain and repair the cage frame assemblies that mainly bear the gravity of the oyster cages, and the cage frame assemblies can be used in a simulated seawater environment on the shore. For example, after adaptively farming the oyster seedlings hanging on the cage frame assemblies, the cage frame assemblies can be transported to the sea for deep-sea farming, which can improve the survival rate of oysters; in addition, by arranging floats on each cage frame assembly, on the one hand, the buoyancy of the cage frame assembly can be enhanced, the downward pressure or downward pull on the floating raft assembly by the cage frame assembly can be reduced, and the deformation and damage of the floating raft assembly can be reduced, thereby reducing the requirement for the strength of the floating raft assembly. On the other hand, the buoyancy of the entire oyster raft can be enhanced, the swaying and displacement of the oyster raft in the wind and waves can be reduced, and the service life and the anti-wind and wave ability of the oyster raft can be enhanced.

[0009] Furthermore, the truss includes floating pipes, and a plurality of the floating pipes are arranged in a loop or quasi-loop shape, and the floating pipes are connected by a hot-melt method. Two adjacent floating pipes are connected in parallel to each other through a plurality of connecting pieces, and the connecting pipes and / or the floating pipes enclose a plurality of floating raft units arranged in a rectangular array. By setting the truss of the floating raft assembly as a sealed quasi-loop shape connected by hot-melt, the buoyancy of the truss is enhanced; by connecting two adjacent floating pipes together through a plurality of connecting pieces, the stability of the truss is enhanced and it is not easy to fall apart, thereby improving the anti-wind and wave performance of the truss; at the same time, by connecting a plurality of connecting pipes to the inner side of the truss to form a stable mesh structure, the stability of the truss is further enhanced.

[0010] Furthermore, the middle parts of each cage frame assembly are placed on the connecting pipes shared by two adjacent floating raft units, and the end parts of the cage frame assembly are placed on the floating pipes and / or connecting pipes on both sides of the two adjacent floating raft units, and / or, the cage frame assembly is connected to the floating pipes and / or connecting pipes on both sides of the two adjacent floating raft units through cables or fasteners; a number of oyster cages and a number of floats are respectively arranged on the frames within each floating raft unit. By placing the two ends and the middle part of the long pipe on the floating pipes and connecting pipes, more stable support for the cage frame assembly is achieved, avoiding the force of the cage frame assembly on the floating pipes and / or connecting pipes being mainly concentrated at the joints of the binding ropes or fasteners, which may cause the joints between the floating pipes and / or connecting pipes and the binding ropes or fasteners to be easily damaged.

[0011] Furthermore, the frame includes at least two long pipes, at least two short pipes and a number of support pipes. The long pipes and the short pipes are connected to each other to form a rectangular frame body. The two ends of the long pipe extend outward from the two short pipes respectively, and the length of the long pipe is greater than the sum of the widths of the two floating raft units; a number of the support pipes are arranged at intervals above the rectangular frame body for hanging the oyster cages. With this setting, the long pipes can cooperate with the connecting parts to limit the cage frame assembly, avoiding collisions between adjacent cage frame assemblies and controlling the density of oysters to prevent the growth of oysters from being affected.

[0012] Furthermore, the connecting pipes include horizontal connecting pipes and vertical connecting pipes. A number of the horizontal connecting pipes are arranged side by side in the first direction of the truss and extend in the second direction of the truss, and are fixedly connected to the floating pipes; a number of the vertical connecting pipes are arranged side by side in the second direction of the truss and extend in the first direction of the truss, and are fixedly connected to the floating pipes and / or the horizontal connecting pipes. The vertical connecting pipes, horizontal connecting pipes and floating pipes are connected by tees, crosses and / or hot melting methods. Connecting the connecting pipes and floating pipes by hot melting can enhance the stability and wave resistance of the floating raft assembly; connecting the horizontal connecting pipes and vertical connecting pipes by tees; making the joints between the vertical connecting pipes on both sides of the horizontal connecting pipe and the horizontal connecting pipe offset from each other to avoid stress concentration at the joints causing damage to the horizontal connecting pipe.

[0013] Furthermore, the two horizontal connecting pipes are arranged in the middle of the truss and are connected in parallel with each other through a number of connecting parts. At least one horizontal connecting pipe is arranged between the two horizontal connecting pipes and the floating pipes; a number of floating barrels are arranged at intervals along the second direction of the truss at the bottoms of the two floating pipes and the two horizontally connected pipes connected in parallel, and the narrow sides of the floating barrels face the water flow direction.

[0014] Furthermore, the connecting member connected to the floating pipe includes a bracket and a handrail column. The bracket is provided with a jack for connecting to the floating pipe. The handrail column is arranged at the top of the bracket and is provided with a plurality of connecting holes. The floating raft assembly further includes a fixed pipe. The fixed pipe sequentially passes through the connecting holes corresponding to each connecting member and is connected end to end in sequence to form a rectangular frame. By connecting multiple fixed pipes into a multi-layer rectangular frame through the handrail columns of the connecting members, the stability of the truss is further enhanced. At the same time, the multi-layer rectangular frame can play a protective role for people walking on the pedal, facilitating the operation of farmers and the leisure fishery sightseeing of tourists. In addition, the rectangular frame can be used to hang a netting to form a fish farming net cage for mixed fish and oyster farming, improving the economic benefits of farmers.

[0015] Furthermore, the oyster cage includes a net cage and a plurality of layers of partitions arranged inside the net cage. A plurality of flexible cables are provided on the net cage that pass through and fix the partitions. The net cage is divided into a plurality of aquaculture chambers by the partitions. The top of the net cage is connected to the support pipe and the short pipe through cables. The partition is a horizontally arranged partition board, or a downwardly concave conical board or an arc-shaped board. With this setting, the oyster cage can move with the wind and waves. At the same time, the impact force of the waves or typhoons received is dispersed by the shape of the partition, improving the overall fatigue resistance of the partition, thereby enhancing the wave and wind resistance of the oyster cage.

[0016] Furthermore, the floating pipe, the connecting pipe, and the support pipe are all HDPE pipes. An enhancing material is provided inside the support pipe to strengthen the strength of the support pipe. The connecting member is injection molded using HDPE raw materials. The oyster raft is mainly made of HDPE raw materials, which has the advantages of better wear resistance, ultraviolet resistance, extensibility, corrosion resistance, and high temperature resistance. Moreover, the connecting pipe of the support cage frame assembly and the support pipe for supporting the oyster cage are strengthened pipes, improving the strength and service life of the oyster raft, enabling the floating raft to still maintain the integrity and stability of the structure under harsh sea conditions. While the other parts are not strengthened to reduce the weight of the oyster raft and increase the buoyancy of the oyster raft. The increase in buoyancy helps to offset the downward pressure generated by the wind and waves on the oyster raft, reducing the possibility of the oyster raft tilting, sinking, or even capsizing.

[0017] Furthermore, the present invention also provides a modular gravity cage oyster raft, which includes an anchoring assembly, the floating raft assembly, the cage frame assembly and the oyster cages. The projections of the two floating raft assemblies on the vertical plane in the width direction overlap. The anchoring assembly includes a plurality of anchor piles arranged outside the two floating raft assemblies and a plurality of cement sinkers arranged between the two floating raft assemblies. The anchor piles are fixed to the seabed and are connected to the width direction of the adjacent floating raft assemblies through anchor chains and / or cables. The cement sinkers are connected to the width direction of the two floating raft assemblies through a plurality of cables. The modular gravity cage oyster raft maintains stability through the anchoring assembly and its own weight, and has the advantages of strong anti-wind and wave ability (typhoon level 15), good stability, etc. It has the characteristics of a wide application sea area, large aquaculture capacity, high efficiency, friendly to the seawater environment, long service life, easy anchoring, and can be matched with mechanized operations, and is very suitable for the construction of oyster farms in the mid- and far-offshore areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic structural diagram of a floating raft in the prior art.

[0019] Figure 2 FIG. is a schematic structural diagram of the modular gravity cage oyster raft according to Embodiment 1 of the present invention.

[0020] Figure 3 is Figure 2 a partial enlarged view of the oyster raft shown.

[0021] Figure 4 is Figure 2 a B-B cross-sectional view of the oyster raft shown.

[0022] Figure 5 is Figure 3 a schematic structural diagram of the cage frame assembly of the oyster raft shown.

[0023] Figure 6 is Figure 2 a schematic structural diagram of the floating raft assembly.

[0024] Figure 7 is Figure 6 a schematic structural diagram of the truss of the floating raft assembly shown.

[0025] Figure 8 is Figure 2 a schematic structural diagram of the floating barrel shown.

[0026] Figure 9 is Figure 2 a schematic structural diagram of the connecting piece shown.

[0027] Figure 10 a schematic structural diagram of the cage frame assembly and the oyster cages.

[0028] Figure 11 isFigure 10 Side view of the cage rack assembly shown

[0029] Figure 12 is Figure 10 Side view of another embodiment of the cage rack assembly shown

[0030] Figure 13 Schematic structural diagram of the modular gravity cage oyster raft provided in Embodiment 2

[0031] Next, in conjunction with the accompanying drawings, the technical solutions of the present invention will be described in detail Specific embodiments

[0032] Embodiment 1

[0033] Please refer to Figure 2-4 , which is a schematic structural diagram of the modular gravity cage oyster raft provided in this embodiment. The oyster raft includes a floating raft assembly 10, a cage rack assembly 20, oyster cages 30, and an anchoring assembly 40. The floating raft assembly 10 includes a plurality of floating raft units A arranged in a rectangular array. A plurality of the cage rack assemblies 20 are respectively detachably connected to at least one of the floating raft units A, and the oyster cages 30 are hung on the cage rack assemblies 20 for oyster farming. The anchoring assembly 40 is arranged on the seabed and connected to the floating raft assembly 10 to fix the floating raft assembly 10, thereby enhancing the stability of the oyster raft. By providing a separable floating raft assembly 10 and cage rack assembly 20, farmers can assemble and disassemble the cage rack assembly 20 and oyster cages 30 on a workboat or onshore, reducing the time of working on the oyster raft and making the entire operation process safer and more efficient

[0034] Specifically, the floating raft assembly 10 includes a truss 11 and connecting pipes 12. The connecting pipes 12 are connected inside the truss 11 to form a plurality of floating raft units A arranged in a rectangular array. In some embodiments, floating barrels 13 are provided at the bottom of the truss 11 and / or the connecting pipes 12 to enhance the buoyancy of the floating raft assembly 10 and improve the wave resistance of the floating raft assembly 10

[0035] Furthermore, the floating raft assembly 10 is arranged in the water flow direction in the width direction to reduce the acting force of water flow and sea waves on the floating raft assembly 10 and improve the stability of the floating raft assembly 10

[0036] Refer to Figure 3-5 , the cage rack assembly 20 includes a frame 21 and floats 22. The floats 22 are arranged below the frame 21 and are connected by tying ropes or fasteners. Specifically, the frame 21 includes long pipes 211, short pipes 212, and support pipes 213. A plurality of the long pipes 211 and a plurality of the short pipes 212 are connected to each other to form the main body of the frame 21. A plurality of support pipes 213 are arranged at intervals above the main body of the frame 21 for hanging the oyster cages 30

[0037] In some embodiments, at least two of the long tubes 211 and at least two of the short tubes 212 are perpendicular to each other to form a rectangular frame body. A plurality of the support tubes 213 are arranged at intervals above the long tubes 211, extend along the length direction of the short tubes 212, and are fixedly connected to at least two of the long tubes 211. At least two of the floats 22 are symmetrically arranged at the bottom of the frame 21 and are fixedly connected to the corresponding long tubes 211 and / or short tubes 212, providing buoyancy for the cage frame assembly 20 and maintaining the balance and stability of the cage frame assembly 20.

[0038] As an example, each of the cage frame assemblies 20 is arranged in a floating raft unit A and is connected to the truss 11 and / or the connecting pipe 12 forming the floating raft unit A by a cable or a fastener. By providing the mutually independent floating raft assembly 10 and cage frame assembly 20, it is convenient to repair the cage frame assembly 20 that mainly bears the gravity of the oyster cage 30, and is beneficial to the mechanized installation and harvesting of the cage frame assembly 20, reducing the workload of the farmers. Refer to Figure 12 Furthermore, in some embodiments, the cage frame 20 further includes a fixing rod 23. The fixing rod 23 includes a vertically arranged vertical rod 231 and a horizontally arranged cross bar. The tops of a plurality of the vertical rods 231 are fixedly connected to the frame 21. The cross bar 232 includes a first cross bar 232a fixedly connected to the bottom ends of the vertical rods 231 to form a rectangular frame structure, and a second cross bar 232b with both ends fixedly connected to the first cross bar 232a respectively. A plurality of the second cross bars 232 correspond to the short tubes 212 and the support tubes 213 one by one, and the second cross bars 232 are parallel to the short tubes 212 and the support tubes 213, and are used for fixing the bottom of the oyster cage, strengthening the stability and safety of the oyster cage during the breeding process, and preventing the oyster cage from being lost due to the impact of wind and waves. The strength of the fixing rod 23 is less than that of the frame 21. The interaction between the fixing rod 23 and a plurality of oyster cages 30 enhances the overall strength and structural stability of the cage frame assembly 20 and the plurality of oyster cages 30 connected thereto. That is, a plurality of oyster cages 30 enhance the stability of the cage frame assembly 20 and prevent it from falling apart, while the cage frame assembly 20 fixes both ends of the oyster cage 30 to prevent the oyster cage 30 from being lost due to the breakage of the cable of the oyster cage. In addition, the fixing rod 23 is provided as hollow and has strong buoyancy, and can provide buoyancy for the cage frame 20 and the plurality of oyster cages 30 connected thereto together with the frame 21 and the floats 22.

[0039] As an example, each of the cage frame assemblies 20 is provided on at least two floating raft units A. Specifically, the frame 21 of the cage frame assembly 20 is erected on the common connecting pipe 12 between at least two adjacent floating raft units A. A number of oyster cages 30 are hung on the frame 21 of the cage frame assembly 20 within the area of each floating raft unit A, and a number of floats 22 are fixedly provided at the bottom. By arranging the cage frame assembly 20 on the connecting pipe 12 between at least two floating raft units A, it is convenient for the mechanical installation and harvesting of the cage frame assembly 20. Further, the cage frame assembly 20 is connected to the truss 11 and / or the connecting pipe 12 forming the floating raft unit A through cables or fasteners, improving the stability and wave resistance of the oyster raft and preventing the cage frame assembly 20 from detaching from the floating raft assembly 10.

[0040] Further, in this embodiment, the frame 21 includes four long pipes 211 vertically arranged on two short pipes 212. The short pipes 212 and the long pipes 211 are connected by four-way connectors or heat fusion. The long pipes 211 on the outer side of the frame 21 and the adjacent long pipes 211 form long pipe assemblies. The two long pipe assemblies are respectively arranged at both ends of the short pipe 212 and extend outward from the two short pipes 212 in a direction perpendicular to the short pipe 212 for connection with the floating raft assembly 10. A number of support pipes 213 are arranged at intervals on the long pipes 211 and are fixedly connected to the four long pipes 211. The support pipes 213 and the short pipes 212 extend outward from the four long pipes 211 in a direction perpendicular to the long pipes 211 to increase the number of oyster cages 30 that can be hung on the cage frame assembly 20.

[0041] Further, a number of limiting structures are provided on the truss 11 and / or the connecting pipe 12 forming the floating raft unit A and are distributed along the length direction of the floating raft unit A. The length of the long pipe 211 is greater than the width of two adjacent floating raft units A. The distance between the two long pipes 211 in the long pipe assembly is greater than the width of the limiting structure, or the distance between the two long pipe assemblies is greater than the width of the limiting structure; the four floats 22 are symmetrically arranged at the bottom of the frame 21 and are fixedly connected to the long pipes 211. When the cage frame assembly 20 is installed on the floating raft assembly 10, the middle of the long pipe 211 is erected on the connecting pipe 12 between at least two adjacent floating raft units A, and the two ends are erected on the truss 21 and / or the connecting pipe 12 of the two floating raft units A. The four floats 22 are evenly distributed within each floating raft unit A to maintain the stability of the cage frame assembly 20; in addition, the two long pipes 211 in the long pipe assembly are respectively located at both ends of a limiting structure, and the long pipe 211 cooperates with the limiting structure to position the cage frame assembly 20, prevent collision between adjacent cage frame assemblies 20, and control the breeding density of oysters.

[0042] Further, refer to Figure 6-7, the truss 11 includes a plurality of floating pipes, and the plurality of floating pipes are arranged in a square or quasi-square shape. The head and tail parts of the butt-jointed floating pipes are connected by hot melting. The two ends of the connecting pipe 12 are fixedly connected to the inner side of the truss 11 by hot melting and / or a tee joint, dividing the inner area of the truss 11 into a plurality of floating row units A arranged in a rectangular array. The connection between the floating pipes is set as an arc angle, further reducing the impact of wind and waves on the truss 11 and improving the wave resistance performance of the floating row assembly 10. Preferably, elbows are provided outside the connection between the floating pipes, further enhancing the strength of the connection between the floating pipes, thereby improving the wave resistance performance of the floating row assembly 10.

[0043] Further, the connecting pipe 12 includes a transverse connecting pipe 121 and a vertical connecting pipe 122. A plurality of the transverse connecting pipes 121 are arranged side by side along the first direction of the truss 11, extend along the second direction of the truss 11, and are fixedly connected to the inner side of the truss 11; a plurality of the vertical connecting pipes 122 are arranged side by side along the second direction of the truss 11, extend along the first direction of the truss 11, and are fixedly connected to the truss 11 and / or the transverse connecting pipe 121. The vertical connecting pipe 122, the transverse connecting pipe 121 and / or the truss 11 enclose the floating row units A arranged in a rectangular array. The number and size of the floating row units A can be set according to specific requirements. In this embodiment, the first direction is the width direction of the floating row assembly 10, and the second direction is the length direction of the floating row assembly 10. The widths of the floating row units A in the first direction of the truss 11 are the same, and the lengths of at least two floating row units A are different. Preferably, the lengths of the floating row units A at both ends in the second direction of the truss 11 are smaller than the lengths of the floating row units A in the middle in the second direction of the truss 11, and the lengths of at least two floating row units A in the first direction are different. In other embodiments, the first direction can also be the length direction, and the second direction can also be the width direction, which is not limited thereto.

[0044] Furthermore, the floating pipes include transverse floating pipes 111 and vertical floating pipes 112. A number of the transverse floating pipes 111 and a number of the vertical floating pipes 112 are sequentially heat-melted and connected at their head and tail parts to form the truss 11. Preferably, two transverse floating pipes 111a and two vertical floating pipes 112a are sequentially heat-melted and connected at their head and tail parts to form a first rectangular frame, and two transverse floating pipes 111b and two vertical floating pipes 112b enclose a second rectangular frame slightly smaller than the first rectangular frame. One end of the two transverse floating pipes 111b and the two vertical floating pipes 112b protrudes from the second rectangular frame and is connected to the vertical floating pipe 112a or the transverse floating pipe 111a of the first rectangular frame. Moreover, the adjacent transverse floating pipes 111a and 111b, and the vertical floating pipes 112a and 112b are connected by a number of connectors 14 to form a rectangular truss 11 in a shape similar to a figure-eight. In this embodiment, the ends of each floating pipe are connected to other floating pipes in a heat-melted manner, the middle parts of each floating pipe are connected to other floating pipes by a number of connectors 14, and the ends of each connecting pipe 12 are fixedly connected to the inner side of the second rectangular frame to enhance the stability of the truss 11 and prevent the truss 11 from falling apart due to the beating of wind and waves.

[0045] Preferably, the transverse connecting pipe 121 includes a first transverse connecting pipe 121a and a second transverse connecting pipe 121b. The first transverse connecting pipe 121a is arranged in the middle of the truss 11 in the second direction, and its two end parts are respectively fixedly connected to the two vertical floating pipes 112b. Moreover, the two first transverse connecting pipes 121a are connected in parallel to each other by a number of connectors 14. A number of the vertical connecting pipes 122 are arranged at intervals in the second direction of the truss 11 between the transverse floating pipe 111b and the adjacent first transverse connecting pipe 121, and a number of the second transverse connecting pipes 121b are arranged at intervals in the first direction of the truss 11. The two end parts of the second transverse connecting pipe 121b are respectively fixedly connected to the two vertical floating pipes 112b. One end of the vertical connecting pipe 122 is fixedly connected to the transverse floating pipe 111b or the first transverse connecting pipe 121a, and the other end is fixedly connected to the second transverse connecting pipe 121b. The vertical connecting pipe 122 is connected to the second transverse connecting pipe 121b by a tee, a cross, and / or a heat-melted manner. In this embodiment, two second transverse connecting pipes 121b are arranged in the floating row assembly 10, and three vertical connecting pipes 122 are arranged between the second transverse connecting pipe 121b and the adjacent transverse floating pipe 111b or the first transverse connecting pipe 121a. In other embodiments, the numbers of the second transverse connecting pipes 121b and the vertical connecting pipes 122 can be set according to specific requirements.

[0046] In some embodiments, the connecting pipe 12 and the truss 11 are connected by hot melting to form a buoyancy pipe assembly that is internally connected and sealed, enhancing the wind and wave resistance of the floating raft assembly 10 and preventing the floating raft assembly 10 from falling apart. In other embodiments, the connecting pipe 12 and the truss 11 are connected by tees and crosses to form a buoyancy pipe assembly with a detachable connecting pipe 12, thereby facilitating the replacement of a damaged connecting pipe 12.

[0047] Referring to Figure 6 , in some embodiments, the vertical connecting pipes 122 on both sides of the second horizontal connecting pipe 121b are offset from each other and are respectively connected to the second horizontal connecting pipe 121b by tees and / or hot melting, so that the connection points between the second horizontal connecting pipe 121b and the vertical connecting pipes 122 are dispersed on the second horizontal connecting pipe 121b, reducing the stress concentration phenomenon of the second horizontal connecting pipe 121b and enhancing the stability of the second horizontal connecting pipe 121b.

[0048] Furthermore, the floating raft assembly 10 further includes floating barrels 13, connecting members 14, and pedals 15. The floating barrels 13 are disposed at the bottom of the truss 11 and / or the connecting pipe 12 and are connected to the truss 11 and / or the connecting pipe 12. A plurality of the floating barrels 13 are fixedly disposed at the bottom of the truss 11 and / or the bottom of the two first horizontal connecting pipes 121a, and the width direction of the floating barrels 13 is arranged in the water flow direction to reduce the acting force of water flow and sea waves on the floating raft assembly 10 and improve the stability of the floating raft assembly 10.

[0049] Referring to Figure 8, the floating barrel 13 is integrally blow-molded from high-density polyethylene material, and includes a floating barrel body 131 and a connecting member 132. The floating barrel body 131 includes a streamlined barrel body. The connecting member 132 includes a first connecting portion and a second connecting portion. The first connecting portion is disposed above the floating barrel body 131 and includes two through holes 132a for the floating pipe or the connecting pipe 12 to pass through. The second connecting portion is used to connect the floating barrel body 131. One of the connecting member 132 and the floating barrel body 131 is provided with a groove, and the other is clamped in the groove. In some embodiments, two of the floating pipes or two of the first transverse connecting pipes 121a are disposed above the floating barrel 13. A raised portion is provided above the floating barrel body 131, and the raised portion is located between two of the floating pipes or two of the first transverse connecting pipes 121a. A groove for clamping the raised portion is provided in the first portion of the connecting member 132, and the two through holes 132a are respectively disposed on both sides of the groove. The second portion of the connecting member 132 is fixedly connected to the floating barrel body 131. The two connecting members 132 are respectively disposed at both ends of the floating barrel body 131 to connect the floating barrel body 131 with two of the floating pipes or two of the first transverse connecting pipes 121a. The second portion of the connecting member 132 is a binding rope and is connected to the outer periphery of the floating barrel body 131. Alternatively, the second portion of the connecting member 132 is a fastener and is fixedly connected to the floating barrel body 131 by screws.

[0050] Refer to Figure 9 , the connecting member 14 includes a bracket 141. The bracket 141 is an integrally formed bracket structure. Insertion holes 142 are provided on both the left and right sides of the bracket 141. The floating pipe or the connecting pipe 12 passes through the insertion holes 142 to connect the connecting member 14 with two adjacent floating pipes or two adjacent connecting pipes 12, thereby enhancing the stability of the floating row assembly 10. The bracket 141 forms a bracket structure with multiple through holes through a plurality of support bars and support holes, facilitating seawater to pass through the bracket 141 and reducing the impact force of the sea waves on the bracket 141. In some embodiments, the bracket 141 serves as a limiting structure for positioning the cage frame assembly 20.

[0051] Further, the connecting member 14 connected to the floating pipe further includes a handrail column 143 fixedly provided at the top of the bracket 141. The handrail column 143 is located outside the truss 11, and a plurality of connection holes 143a are provided on the handrail column 143. The floating raft assembly 10 further includes a fixing pipe 16. The fixing pipe 16 sequentially passes through the connection holes 143a corresponding to each connecting member 14 and is connected end to end in sequence to form a fixing frame. The multi-layer fixing frame further enhances the stability of the truss 11 and plays a protective role for people walking on the pedal. In this embodiment, two connection holes 143a are provided on the handrail column 143, the distance between the two connection holes 143a is 50 - 70 cm, and the height of the connecting member 14 with the handrail column 143 is 110 - 130 cm. In other embodiments, the size of the connecting member 14 can be set according to specific requirements.

[0052] The pedal 15 is provided above the truss 11 and / or the connecting pipe 12. Specifically, a pedal mounting base is provided at the top of the bracket 141, and the pedal 15 is fixedly connected to the pedal mounting base through a locking member. Preferably, the pedal is about 400 mm wide and about 75 mm thick.

[0053] In some embodiments, the middle of the long pipe 211 of the cage frame assembly 20 is placed on the second transverse connecting pipe 121b. One end of the long pipe assembly is clamped with the connecting member 14 on the truss 11, and one end is clamped with the connecting member 14 on the first transverse connecting pipe 121a, so as to facilitate the quick installation of the cage frame assembly 20 and the floating raft assembly 10.

[0054] Further, the cage frame assembly 20 further includes hooks. A plurality of the hooks are symmetrically provided in the middle of the two groups of long pipe assemblies. The hooks cooperate with the hooks on the mechanized operation ship to facilitate the installation or harvesting of the cage frame assembly 20 by the mechanized operation ship.

[0055] Refer to Figure 10-12, the oyster cage 30 includes a net cage 31 and multiple layers of partitions 32 disposed inside the net cage 31. A number of flexible cables 33 passing through and fixing the partitions are provided on the net cage 31. The net cage 31 is separated into a number of breeding chambers by the partitions 32. The top of the net cage 31 is connected to the cage frame assembly 20 through a cable. When using the oyster cage 30, the flexible cables 33 increase the flexibility of the entire oyster cage 30, enabling the flexible cables 33 to move with the wind and waves, improving the wind and wave resistance of the oyster cage 30 and the yield per unit volume of water. A number of small holes are opened on the partitions 32 for water circulation, providing a good growth environment for the oysters, improving the meat quality and meat yield of the oysters. When not in use, the partitions 32 can be stacked to reduce the occupied space and is convenient to use. In some embodiments, the cage frame assembly 20 further includes fasteners. A number of the fasteners are fixed on the support pipe 213 and / or the short pipe 212. The oyster cage 30 is connected to the fasteners through a cable. By manually opening and closing the fasteners, the oyster cage 30 can be conveniently and quickly installed or disassembled.

[0056] Further, knots for fixing the partition 32 are provided on the flexible cable 33 below each partition 32. The flexible cable is formed by cross-weaving multiple fiber strands. The partition 32 is a horizontally arranged partition board, or a downwardly concave conical board or an arc-shaped board. The conical board and the arc-shaped board can save the breeding space, increase the yield of oysters, and at the same time can reduce the impact of wind and waves on the oyster cage 30 and the oysters, and extend the service life.

[0057] The anchoring assembly 40 includes anchor piles 41. A number of the anchor piles 41 are symmetrically arranged outside the floating raft assembly 10 and are respectively connected to the width direction of the floating raft assembly 10. By fixedly arranging the anchor piles 41 on both sides in the width direction of the floating raft assembly 10, the impact of wind and waves on the width direction of the floating raft assembly 10 is reduced, and the wind and wave resistance of the oyster raft is further improved.

[0058] In some embodiments, the distance between the oyster cage 213 and the short pipe 211, and between two support pipes 213 is preferably 400 - 700 mm to control the breeding density of the oysters and improve the quality of the oysters. In this embodiment, the distance between the oyster cage 213 and the short pipe 211, and between two support pipes 213 is about 500 mm.

[0059] In some embodiments, the length of the short pipe 211 is preferably 2 - 4 m, and the length of the long pipe 212 is preferably 4 - 5 m. In this embodiment, the length of the short pipe 211 is about 3.02 m, and the length of the long pipe 212 is about 4.74 m. Refer to Figure 10 , the cage frame assembly 20 of this embodiment can hang up to 40 oyster cages 30. In other embodiments, the size of the cage frame assembly 20 can be adjusted according to specific requirements.

[0060] In some embodiments, the spacing between two long tubes 212 in the long tube assembly is preferably 300 - 500 mm; the distance between the two floats 22 in the length direction of the cage assembly 20 is 1 - 2 m, preferably 1.5 m.

[0061] In some embodiments, the spacing between the two vertical connecting tubes 122 is preferably 7 - 11 m, and the distance between the vertical connecting tube 122 and the adjacent vertical floating tube 112 is preferably 5 - 9 m; the distance between the second horizontal connecting tube 121b and the horizontal floating tube 111 and / or the first horizontal connecting tube 121a is preferably 1.5 - 2.2 m. By reasonably setting the number and distance of the horizontal connecting tubes and vertical connecting tubes, the requirements for the strength and buoyancy of the floating raft assembly are simultaneously met. In this embodiment, the spacing between the two vertical connecting tubes 122 is about 9 m, and the distance between the vertical connecting tube 122 and the adjacent vertical floating tube 112 is about 7 m; the distance between the horizontal floating tube 111 and the first horizontal connecting tube 121a is about 4 m. The floating raft assembly is 32.277 meters long, 8.875 meters wide, and 0.6 meters high, and can be installed with up to 18 cage assemblies 20. In other embodiments, the sizes of the floating raft assembly 10 and the cage assembly 20 can be set according to specific requirements.

[0062] In some embodiments, the truss 11, the connecting tube 12, and the frame 21 are all made of high-density polyethylene (HDPE) material, and the connector 14 is injection-molded from HDPE raw material. Compared with the bamboo and wood materials of traditional floating rafts, HDPE material is more environmentally friendly, more wear-resistant, resistant to ultraviolet rays, has better extensibility, corrosion resistance, and high temperature resistance. The oyster raft made of HDPE pipes can be used in seawater for a long time without being easily damaged, avoiding the aging problems caused by seawater erosion and ultraviolet radiation, and has a high bearing capacity, can withstand a large weight and pressure, has a stable structure, is not easily deformed, and can ensure the stability of the oyster raft under various sea conditions; in addition, the HDPE pipes can be recycled after use, reducing environmental pollution. At the same time, it does not release harmful substances into the seawater and is harmless to the marine ecological environment; and due to its strong corrosion resistance and weather resistance, its maintenance and upkeep are relatively simple, and it has the characteristics of a long service life, low maintenance cost, and good environmental protection, making its long-term economic benefits higher.

[0063] Further, in some embodiments, the floating pipe is an HDPE pipe with an outer diameter of 315 mm and a wall thickness greater than or equal to 12 mm, the connecting pipe 12 is an HDPE pipe with an outer diameter greater than 300 mm and a wall thickness greater than or equal to 15 mm, the long pipe 212 and the short pipe 211 use HDPE pipes with an outer diameter of 125 mm and a wall thickness greater than or equal to 7.4 mm, the support pipe 213 is an HDPE pipe with an outer diameter of 90 mm and a wall thickness greater than or equal to 6.7 mm, and the specifications of the floating barrel 13 and the float 22 are 0.94 m in length, 0.58 m in width, and 0.62 m in height. In other embodiments, the dimensions of the truss 11, the connecting pipe 12, the long pipe 212, the short pipe 211, and the support pipe 213 can be set according to specific requirements.

[0064] Further, in some embodiments, the support pipe 213 and the short pipe 212 are internally provided with reinforcing ribs or reinforcing layers to improve the strength of the HDPE pipe. The materials of the reinforcing ribs or reinforcing layers include reinforcing materials such as glass fiber. By enhancing the strength of the support pipe 213 and the short pipe 212, they can withstand the pulling force of several oyster cages 30 on the support pipe 213 and the short pipe 212 when hoisting the cage frame assembly 20, thereby improving the strength and stability of the cage frame assembly 20. In addition, when the support pipe 213 is damaged under force, the support pipe 213 and / or the short pipe 212 detachably connected by a four-way piece can facilitate farmers to carry out repairs and replacements; the long pipe 211 is made of HDPE, with a hollow interior or filled with hydrophobic rock wool or other environmentally friendly fillers, so as to provide better buoyancy support at sea and ensure the use safety. The long pipe 211 and the float 22 together provide buoyancy for the cage frame assembly 20, enhance the wave resistance performance of the cage frame assembly 20, and reduce the pressure of the cage frame assembly 20 on the floating raft assembly, so that the floating raft assembly 10 has higher buoyancy and thus enhances its wave resistance performance, and reduces the damage of the connecting pipe 12 after being pressed. By strengthening the local strength and local buoyancy of the frame 21, while minimizing the gravity and increasing the buoyancy as much as possible, the strength of the position where the oyster cages 30 are hung on the cage frame assembly 20 is improved, preventing the cage frame assembly 20 from being damaged or falling apart due to insufficient strength, resulting in the loss of oyster cages and affecting the economic benefits.

[0065] Further, the second transverse connecting pipe 121b is an HDPE pipe internally provided with reinforcing ribs or reinforcing layers to withstand the downward pressure of the cage frame assembly 20 on the second transverse connecting pipe 121b. In some embodiments, the first transverse connecting pipe 121a and the transverse floating pipe 111b are reinforcing pipes, and / or the connection between the connecting pipe 12 and the truss 11 is strengthened by components at the connection.

[0066] Further, a reinforcing sleeve is provided outside the connection between the floating pipe and the connecting pipe 12, and the connection between the floating pipe, the connecting pipe 12 and the connecting member 14 to enhance the strength of the connection and prevent the connection from deforming or breaking under stress.

[0067] In some embodiments, the structure of the float 22 is similar to that of the floating barrel 13, except that the diameter of the jack hole of the float 22 is smaller than that of the floating barrel 13. In some embodiments, the float 22 includes a floating barrel body 131 and a connecting member 132. The floating barrel body 131 includes a streamlined barrel body and a raised portion provided above the streamlined barrel body. The raised portion is provided with a recessed placement groove. The support pipe 213 can pass through the placement groove and be connected to the float 22 to further enhance the stability of the cage frame assembly 20 and prevent the cage frame assembly 20 from being blown apart by strong winds.

[0068] When cultivating oysters, the oyster cage 30 is connected to the frame 21 of the cage frame assembly 20 through a cable. Then, the working ship is used to sequentially install multiple cage frame assemblies 20 stacked on the working ship into the floating raft assembly 10 through a jib. The middle part of the frame 21 of each cage frame assembly 20 is placed on the second transverse connecting pipe 121b shared by at least two floating raft units A, and the end part is placed on the transverse floating pipe 11 or the first transverse connecting pipe 121a on both sides of the two floating raft units A. The two long pipes 211 of the long pipe assembly are matched with the corresponding connecting members 14 to achieve limit. At the same time, the farmer can also fix the cage frame assembly 20 in the floating raft assembly 10 through a cable or a fastener to cultivate oysters. After the cultivation is completed, the cage frame assembly 20 in the floating raft assembly 10 is sequentially lifted onto the working bed through the jib of the working ship, and then the oyster cage 30 on the cage frame assembly 20 is disassembled to harvest oysters. By setting the oyster raft into three modules that can be separated from each other: the oyster cage, the cage frame assembly, and the floating raft assembly and the anchoring assembly fixed at sea, multiple oyster cages are hung on the cage frame assembly, which makes it convenient for the working ship to operate in units when installing and harvesting the oyster cages, reduces the number and difficulty of hoisting, and at the same time can prevent the farmer from fixing the oyster cages on the floating raft one by one on the pedal, improving the efficiency and safety of the operation and reducing the workload of the farmer.

[0069] Embodiment 2

[0070] Refer to Figure 13, the oyster raft provided in this embodiment includes two of the floating raft assemblies 10, several cage frame assemblies 20 and oyster cages 30 that cooperate with the floating raft assemblies 10, and an anchoring assembly 40 for fixing the floating raft assemblies. The two floating raft assemblies 10 are arranged with their width directions facing the water flow direction, and the projections of the two floating raft assemblies 10 on the vertical plane in the width direction overlap. The floating raft assembly 10, the cage frame assembly 20, the oyster cage 30, and the anchoring assembly 40 are similar to the oyster raft structure described in Embodiment 1. The difference is that the anchoring assembly 40 in this embodiment includes several anchor piles 41 provided on the outer sides of the two floating raft assemblies 10 and cement sinking blocks 42 provided between the two floating raft assemblies 10. The anchor piles 42 are fixed to the seabed and are connected to the width direction of the truss 11 through anchor chains and / or cables. The cement sinking blocks 42 are placed on the seabed corresponding to the middle positions of the two floating raft assemblies 10, and each cement sinking block 42 is respectively connected to the two floating raft assemblies 10 through several cables. The number and weight of the cement sinking blocks 42 can be set according to specific requirements. By setting the cement sinking blocks 42, the two floating raft assemblies 10 are fixed and connected into a whole, thereby improving the stability and wave resistance of the oyster raft and increasing the aquaculture area of the oyster raft.

[0071] In this embodiment, three anchor piles 41 are provided on each side of the two floating raft assemblies 10, and the three anchor piles 41 are arranged at intervals along the width direction of the oyster raft assembly 10; the cement sinking blocks 42 are provided in two, and each preferably weighs five tons. The two cement sinking blocks 42 are arranged side by side at the bottom of the middle positions of the two floating raft assemblies 10 and are respectively connected to the two floating raft assemblies 10 through six cables.

[0072] Compared with the prior art, the beneficial effects of the modular gravity cage oyster raft provided by the present invention are as follows:

[0073] (1) The modular gravity cage oyster raft provided by the present invention maintains stability through the anchoring assembly and its own weight, and has the advantages of strong wave resistance (typhoon of level 15), good stability, etc. It has the characteristics of a wide application sea area, large aquaculture capacity, high efficiency, friendly to the seawater environment, long service life, easy anchoring, and can match mechanized operations, and is very suitable for the construction of oyster farms in the mid - and far - sea areas.

[0074] (2) By setting the oyster raft as three separable modules: the oyster cages, the cage frame assembly, and the floating raft assembly and the anchoring assembly fixed at sea, multiple oyster cages are hung on the cage frame assembly, facilitating the unit operation of the working boat during the installation and harvesting of the oyster cages, reducing the number and difficulty of hoisting operations. At the same time, it can prevent farmers from fixing the oyster cages to the floating raft one by one on the pedal, improving the efficiency and safety of the operation and reducing the workload of farmers. In addition, the separable cage frame assembly is convenient for farmers to maintain and repair on the one hand, and can be used in the simulated seawater environment on the shore to adaptively breed the oyster seedlings and then transport them to the sea for cultivation to enhance the survival rate of the oysters.

[0075] (3) By setting the cage frame assembly and the floating raft assembly independently of each other, it is convenient to lift the cage frame assembly out of the floating raft assembly during the oyster cultivation process, so as to wash the oyster cages in the cage frame assembly, conveniently and quickly remove the attachments on the oyster cages, prevent the attachments from hindering the oysters from absorbing nutrients in the water and causing the death of the oysters, and at the same time reduce the time and cost of manually cleaning each oyster cage one by one. In addition, during the process of washing the oyster cages, farmers can observe the growth status of the oysters in the oyster cages, timely discover and handle oyster diseases, and prevent a large number of oysters from being lost due to mutual infection among the oysters.

[0076] (4) By setting the width direction of the floating raft assembly facing the water flow, the sea waves mainly act on the width direction rather than the length direction of the floating raft assembly, and the impact of the sea waves on the floating raft assembly is reduced by reducing the acting area. At the same time, by setting anchor piles and cement sinkers on both sides of the width direction of the floating raft assembly to fix the floating raft assembly, the influence of the sea wave impact on the stability of the floating raft assembly is reduced.

[0077] (5) By setting the truss of the floating raft assembly as a quasi-return shape connected by hot melting, and connecting adjacent floating pipes together through multiple connectors, it is not easy to fall apart, thereby improving the stability and wave resistance of the truss; by setting the corners of the truss as streamlined, the stress concentration phenomenon at the edges of the truss is reduced, avoiding damage due to excessive local stress. At the same time, the streamlined design can reduce the frictional resistance and form resistance between the floating raft assembly and the water flow, reducing adverse conditions such as tilting and rolling caused by wave action; by connecting multiple connecting pipes to the inside of the truss to form a stable network structure, and connecting multiple fixed pipes into a multi-layer rectangular frame through the handrail columns of the connectors, the stability of the truss is further enhanced. At the same time, the multi-layer rectangular frame can protect people walking on the pedal, facilitating the operation of farmers and the leisure fishery sightseeing of tourists; connecting the vertical connecting pipes on both sides of the second horizontal connecting pipe to the second horizontal connecting pipe through tees respectively, making the force application points of the vertical connecting pipes on both sides on the second horizontal connecting pipe more dispersed, avoiding the stress concentration at the force application point of the second horizontal connecting pipe and being easily damaged. By opening through holes in the connectors, the weight of the connectors is reduced, increasing the buoyancy of the floating raft assembly. At the same time, the sea wave can partially pass through the through holes of the connectors, thereby reducing the direct impact force of the sea wave on the front of the connectors, and reducing the phenomena such as damage and shaking of the floating raft assembly.

[0078] (6) The oyster raft of the present invention mainly uses HDPE raw materials, which have the advantages of being more wear-resistant, ultraviolet-resistant, better extensibility, corrosion-resistant and high-temperature resistant; and, setting the connecting pipes of the support cage frame assembly and the support pipes for supporting the oyster cages as reinforced pipes can improve the strength and service life of the oyster raft, enabling the floating raft to still maintain the integrity and stability of the structure under harsh sea conditions; while other parts are not strengthened to reduce the weight of the oyster raft and increase the buoyancy of the oyster raft. The increase in buoyancy helps to offset the downward pressure generated by the wind and waves on the oyster raft, reducing the possibility of the floating raft tilting, sinking or even capsizing.

[0079] (7) By setting the long pipe of the cage frame assembly to extend outside the short pipe, and the length of the long pipe is greater than the sum of the widths of two floating raft units, the two ends and the middle of the long pipe are laid on the floating pipe and the connecting pipe, thereby supporting the cage frame assembly, avoiding the gravity of the cage frame assembly being mainly concentrated at the connection points of the binding ropes or fasteners, resulting in easy damage at the connection points. At the same time, the long pipe cooperates with the connectors to fix the cage frame assembly, avoiding the collision of adjacent cage frame assemblies and affecting the service life, and realizing the control of the oyster density to avoid affecting the growth of oysters; in addition, by setting a number of floats on each cage frame assembly, the buoyancy of the cage frame assembly is enhanced, reducing the downward pressure or downward tension of the cage frame assembly on the floating raft assembly, enhancing the buoyancy of the oyster raft, reducing the shaking and displacement of the oyster raft in the wind and waves, so as to improve the wave resistance of the oyster raft. At the same time, the reduction of the downward pressure or downward tension helps to reduce the deformation and damage of the floating raft assembly, thereby reducing the maintenance cost and enhancing the service life of the oyster raft.

[0080] (8) By setting flexible cable connections between multiple layers of partitions inside the oyster cage, the oyster cage can move with the wind and waves, thereby improving the anti-wind and wave resistance of the oyster cage; by setting the partition as a downwardly concave conical plate or arc-shaped plate, the aquaculture area is increased, the oyster production is increased, and at the same time, the impact force of the waves or typhoons received is dispersed by the shape of the partition, so that the overall anti-fatigue strength of the partition is improved, the influence of wind and waves on the oyster cage and oysters can be reduced, and the service life of the oyster cage can be extended.

[0081] (9) Set the body of the floating barrel to be streamlined, increase the strength of the floating barrel, improve the anti-wind and wave resistance of the floating barrel, set the narrow side of the floating barrel facing the water flow direction, reduce the acting area of the waves on the floating barrel, and further improve the anti-wind and wave resistance of the floating barrel.

[0082] The present invention is not limited to the above embodiments. If various modifications or deformations of the present invention do not depart from the spirit and scope of the present invention, and if these modifications and deformations are within the scope of the claims of the present invention and equivalent technical scope, then the present invention also intends to include these modifications and deformations.

Claims

1. A modular gravity cage oyster raft, characterized in that: It includes a floating raft assembly, a cage frame assembly and an oyster cage; the floating raft assembly includes a truss and connecting pipes, the truss includes floating pipes, and several of the floating pipes are arranged in a square or quasi-square shape, and the floating pipes are connected by hot melting. Two adjacent floating pipes are connected side by side by several connecting pieces. Several of the connecting pipes are connected inside the truss, and a plurality of floating raft units arranged in a rectangular array are enclosed between the connecting pipes and the truss and / or between several of the connecting pipes; the cage frame assembly includes a frame and floats, and several of the floats are fixedly arranged below the frame. Several of the cage frame assemblies are respectively detachably connected to at least one of the floating raft units; several of the oyster cages are hung on the frame for oyster farming; wherein, the middle part of each cage frame assembly is placed on the connecting pipe shared by two adjacent floating raft units, and the end part of the cage frame assembly is placed on the floating pipes and / or connecting pipes on both sides of the two adjacent floating raft units, and / or, the cage frame assembly is connected to the floating pipes and / or connecting pipes on both sides of the two adjacent floating raft units by cables or fasteners; several oyster cages and several floats are respectively arranged on the frames within each floating raft unit.

2. The modular gravity cage oyster raft according to claim 1, characterized in that: The frame includes at least two long pipes, at least two short pipes and several support pipes. The long pipes and the short pipes are connected to form a rectangular frame body. The two ends of the long pipes extend outward from the two short pipes, and the length of the long pipes is greater than the sum of the widths of two floating raft units; several of the support pipes are arranged at intervals above the rectangular frame body for hanging the oyster cages.

3. The modular gravity cage oyster raft according to claim 2, characterized in that: The connecting pipes include horizontal connecting pipes and vertical connecting pipes. Several of the horizontal connecting pipes are arranged side by side in the first direction of the truss and extend in the second direction of the truss and are fixedly connected to the floating pipes; several of the vertical connecting pipes are arranged side by side in the second direction of the truss and extend in the first direction of the truss and are fixedly connected to the floating pipes and / or the horizontal connecting pipes. The vertical connecting pipes, horizontal connecting pipes and floating pipes are connected by tees, crosses and / or hot melting.

4. The modular gravity cage oyster raft according to claim 3, wherein: Two of the horizontal connecting pipes are arranged in the middle of the truss and are connected side by side by several connecting pieces, and at least one of the horizontal connecting pipes is arranged between the two horizontal connecting pipes and the floating pipes; several floating barrels are arranged at intervals along the second direction of the truss at the bottoms of the two floating pipes and the two horizontal connecting pipes connected side by side, and the narrow sides of the floating barrels face the water flow direction.

5. The modular gravity cage oyster raft according to claim 4, characterized in that: The connecting piece connected to the floating pipe includes a bracket and a handrail column. The bracket is provided with a jack for connecting to the floating pipe, and the handrail column is arranged on the top of the bracket and is provided with several connecting holes; the floating raft assembly further includes a fixed pipe, and the fixed pipe sequentially passes through the connecting holes corresponding to each connecting piece and is sequentially connected end to end to form a rectangular frame.

6. The modular gravity cage oyster raft according to claim 5, characterized in that: The oyster cage includes a wire cage and multiple layers of partitions arranged inside the wire cage. Several flexible cables passing through and fixing the partitions are arranged on the wire cage. The wire cage is divided into several breeding chambers by the partitions. The top of the wire cage is connected to the support pipe and the short pipe by cables; the partitions are horizontal partitions, or downwardly concave conical plates or arc plates.

7. The modular gravity cage oyster raft according to claim 6, characterized in that: The floating pipe, the connecting pipe, and the support pipe are all HDPE pipes; an enhancing material is provided inside the support pipe to strengthen the strength of the support pipe; the connecting piece is injection-molded using HDPE raw materials.

8. A modular gravity cage oyster raft, characterized in that: It includes an anchoring assembly, the floating raft assembly according to any one of claims 1 to 7, the cage frame assembly, and the oyster cage. The projections of the two floating raft assemblies on the vertical plane in the width direction overlap; the anchoring assembly includes a plurality of anchor piles provided on the outer sides of the two floating raft assemblies and a plurality of cement sinkers provided between the two floating raft assemblies. The anchor piles are fixed to the seabed and are connected to the width direction of the adjacent floating raft assembly through anchor chains and / or cables; the cement sinkers are connected to the width direction of the two floating raft assemblies through a plurality of cables.

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