Semi-automatic breeding and harvesting device for breeding monomer oysters in inner bay sea area

Abstract

The invention relates to the technical field of shellfish culture equipment, in particular to a semi-automatic culture harvesting device for culture of monomer oysters in an inner bay sea area, which comprises a water surface floating cage, a workboat and a shuttle machine, and the water surface floating cage comprises a traction rope; the workboat comprises a boat body, a first fixing column, a second fixing column, a support, a winder, a servo motor and a spring buckle, and the traction rope is connected into the spring buckle in a penetrating mode. The shuttle machine comprises a floating platform, a guide frame, a guide connecting rod, an adjusting frame and two connecting rings, the two connecting rings are connected to the outer sides of the first fixing column and the second fixing column in a sleeving mode correspondingly, the guide frame is arranged on the front side of the upper surface of the floating platform, the adjusting frame is arranged on the rear side of the upper surface of the floating platform, and the guide connecting rod is connected with the guide frame and the adjusting frame. By optimizing the design of the water surface floating cage, the workboat and the shuttle machine, semi-automatic operation of oyster breeding and harvesting is achieved, remarkable economic and social benefits are achieved, and the device can be widely applied to the oyster breeding industry in coastal inner bay sea areas.

Description

Technical Field

[0001] The present invention relates to the technical field of shellfish farming equipment, and particularly to a semi-automatic farming and harvesting device for single oyster farming in inner bay waters. Background Art

[0002] As an important marine economic shellfish, oysters occupy a significant economic position in the seawater aquaculture industry. According to data, the oyster aquaculture volume accounts for more than 40% of the total seawater aquaculture output of shellfish, making it one of the most important varieties in seawater shellfish aquaculture. There are many oyster farming methods, and with the continuous development of aquaculture, new farming methods and technologies are constantly emerging. The more common ones include bamboo stick farming, bottom seeding farming, strip stone and standing stone farming, hanging farming, etc. Among them, hanging farming is further divided into grid frame type, longline type and raft frame type. Raft farming has a high yield and is an important development direction for future oyster farming.

[0003] However, in the process of using raft frame hanging cages to farm oysters, there are problems such as low mechanization level, high labor intensity, and low production efficiency, which are mainly reflected in: 1. Fouling organisms attachment: The surface of the farming cage is easily attached with fouling organisms, which affects water exchange, leads to the deterioration of the oyster growth environment, and needs to be cleaned regularly.

[0004] 2. Difficult in sub-packaging and management: As the oysters grow, they need to be taken out of the farming cage and re-packaged into new farming cages. This process mainly relies on manual labor, with high labor intensity and low efficiency.

[0005] 3. Low harvesting efficiency: The traditional oyster harvesting method mainly involves using a small harvesting boat to salvage from the sea along the longline raft frame, with a low mechanization level. This method not only has low efficiency but also easily causes oysters to fall, thus affecting economic benefits.

[0006] Therefore, how to improve oyster farming efficiency is an urgent problem for those skilled in the art to solve. Summary of the Invention

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an oyster farming, management and harvesting device for inner bay waters that is suitable for good water conditions and rich bait, can achieve efficient and safe high-quality oyster farming and harvesting in a low-wind and low-wave environment, and at the same time ensure the fatness and quality of oysters.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is: a semi-automatic farming and harvesting device for single oyster farming in inner bay waters, including a water surface floating cage, a working boat, and a shuttle, wherein the water surface floating cage includes a towing rope; The working boat includes a hull, a first fixed column, a second fixed column, a bracket, a wire winder, a servo motor, and a spring buckle. The bracket connects the hull and the wire winder. The wire winder is arranged at the output end of the servo motor. The towing rope is wound around the wire winder. The first fixed column and the second fixed column are arranged in parallel on the same side of the hull. The first fixed column is arranged at the tail of the hull. The spring buckle is arranged below the hull. The towing rope passes through the spring buckle. The shuttle includes a floating platform, a guiding frame, a guiding connecting rod, an adjusting frame, and two connecting rings. The two connecting rings are arranged on the side surface of the floating platform. The two connecting rings are respectively sleeved outside the first fixed column and the second fixed column. The guiding frame is arranged on the front side of the upper surface of the floating platform. The adjusting frame is arranged on the rear side of the upper surface of the floating platform. The guiding connecting rod connects the guiding frame and the adjusting frame. The guiding frame includes a protecting rod, a guiding rod, a front fixing rod, and a rear fixing rod. The front fixing rod and the rear fixing rod are arranged in parallel on the floating platform. The protecting rod connects the front fixing rod and the rear fixing rod. The guiding rod is arranged below the protecting rod.

[0009] For the above semi - automated aquaculture and harvesting device for single - oyster farming in inner - bay waters, the [unspecified part] is rotatably connected to the hull. The working boat further includes an adjusting rope and an adjusting handle. The adjusting handle is slidably arranged on the first fixed column. The adjusting rope connects the bracket and the adjusting handle.

[0010] For the above semi - automated aquaculture and harvesting device for single - oyster farming in inner - bay waters, the length of the rear fixing rod is greater than that of the front fixing rod. The front fixing rod includes a first fixing rod, a second fixing rod, and a front connecting rod. The rear fixing rod includes a third fixing rod, a fourth fixing rod, and a rear connecting rod. The protecting rod includes a left protecting rod and a right protecting rod. The front connecting rod connects the first fixing rod and the second fixing rod. The rear connecting rod connects the third fixing rod and the fourth fixing rod. One end of the guiding connecting rod is connected to the rear connecting rod. The left protecting rod is connected to the tops of the first fixing rod and the third fixing rod. The right protecting rod is connected to the tops of the second fixing rod and the fourth fixing rod.

[0011] For the above semi - automated aquaculture and harvesting device for single - oyster farming in inner - bay waters, the included angle between the protecting rod and the floating platform is 45°. A guiding arc is arranged on the side of the protecting rod close to the floating platform, and the guiding arc extends towards the outside of the floating platform.

[0012] The above semi - automated aquaculture and harvesting device for single oyster farming in inner bay waters. The guiding rods include a left guiding rod and a right guiding rod. The left guiding rod is arranged below the left protective rod, and the right guiding rod is arranged below the right protective rod. The distance between the left guiding rod and the right guiding rod is less than the distance between the left protective rod and the right protective rod.

[0013] The above semi - automated aquaculture and harvesting device for single oyster farming in inner bay waters. The guiding rods further include a guiding connecting rod. One end of the guiding connecting rod is fixed at the mid - point of the front connecting rod. The near - water ends of the left guiding rod and the right guiding rod are bent inward and connected to the other end of the guiding connecting rod to form a closed guiding circle. The guiding circle extends into the water surface and is below the water surface. The end of the left guiding rod far from the water surface bends obliquely downward, and the end of the right guiding rod far from the water surface bends obliquely upward.

[0014] The above semi - automated aquaculture and harvesting device for single oyster farming in inner bay waters. The adjustment frame includes a protective frame and a non - powered roller slideway. Parallel protective plates are arranged on both sides of the protective frame. The non - powered roller slideway is arranged inside the protective frame between the protective plates. The distance between the protective plates is the same as the distance between the left protective rod and the right protective rod.

[0015] The above semi - automated aquaculture and harvesting device for single oyster farming in inner bay waters. The water - surface floating cage further includes a floating cage main body, buoyancy blocks, floating balls, and a main rope. The buoyancy blocks are arranged above the floating cage main body. The floating balls are arranged at both ends of the main rope. The buoyancy blocks are distributed on the main rope. Both ends of the traction rope are connected to the floating balls. The length of the traction rope is greater than the length of the main rope.

[0016] The above semi - automated aquaculture and harvesting device for single oyster farming in inner bay waters. The main rope includes plastic floating rods and movable buckles. The movable buckles are arranged at both ends of the plastic floating rods. The plastic floating rods are connected into a main rope through the movable buckles. Circular rings are arranged on both sides of the middle part below the floating cage main body. The floating cage main body is connected to the plastic floating rods through the circular rings. The aperture of the circular rings is larger than the outer diameter of the plastic floating rods. The floating cage main body can rotate around the plastic floating rods. Cage doors are arranged on both sides of the floating cage main body.

[0017] The beneficial effects of a semi - automated aquaculture and harvesting device for single - oyster farming in inner - bay waters of the present invention are as follows: By using this device, problems existing in oyster aquaculture technology such as low mechanization level, high labor intensity, and low production efficiency can be solved. By using a circular ring sleeved on a plastic floating rod, the connection stability of the floating cage body can be ensured. The aperture of the circular ring is slightly larger than that of the plastic floating rod, and the floating cage can rotate freely around the plastic floating rod. By periodically flipping the floating cage, oysters can receive sunbathing periodically, improving the texture of oyster meat. At the same time, the natural waves drive the floating cage body to shake, causing the oysters to rub against each other, playing a role in naturally polishing the shell shape and improving the quality and appearance of oysters. By using a servo motor to drive a wire winder and a traction rope, the main rope and the floating cage body are driven to move on the shuttle, and the mechanized flow operation significantly improves the efficiency of processes such as seedling loading, cage separation, cleaning, and harvesting. The movable buckle design between plastic floating rods can be flexibly increased or decreased according to the number of floating cage bodies, adapting to aquaculture requirements of different scales. Through the connection design between the workboat and the water - surface floating platform, and the synergistic effect of the traction rope and the guide rod, the safety and stability of the harvesting process are ensured. By using a guide ring, the movement direction of the floating cage body can be guided; through the different inclination directions at the ends of the left and right guide rods, it is convenient to guide the rising and rotation of the floating cage body; the guiding connecting rod blocks the further rotation of the floating cage body to ensure the stable rising of the floating cage body; through the unpowered roller slideway, the rapid and stable transportation of the floating cage body can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic diagram of the overall structure of the water - surface floating cage in an embodiment of the present invention; Figure 2 FIG. is a front - view schematic diagram of the floating cage body in an embodiment of the present invention; Figure 3 FIG. is a back - view schematic diagram of the floating cage body in an embodiment of the present invention; Figure 4 FIG. is a schematic diagram of the overall structure of the workboat in an embodiment of the present invention; Figure 5 FIG. is a schematic diagram of the overall structure of the shuttle in an embodiment of the present invention.

[0019] Description of reference numerals: water surface floating cage 10, towing rope 101, floating cage main body 102, plastic buoyancy block 103, ring 104, floating ball 105, main rope 106, plastic floating rod 107, movable buckle 108, cage door 109, workboat 20, hull 201, first fixed column 202, second fixed column 203, bracket 204, wire winder 205, servo motor 206, spring buckle 207, diesel engine 208, motor switch 209, cockpit 210, adjusting handle 211, adjusting rope 212, shuttle 30, floating platform 301, guiding connecting rod 302, first fixed rod 303, second fixed rod 304, front connecting rod 305, third fixed rod 306, fourth fixed rod 307, rear connecting rod 308, left guard rail 309, right guard rail 310, left guiding rod 311, right guiding rod 312, guiding connecting link 313, guiding ring 314, unpowered roller slideway 315, first adjusting fixed column 316, second adjusting fixed column 317, third adjusting fixed column 318, fourth adjusting fixed column 319, left guard plate 320, right guard plate 321, first connecting ring 322, second connecting ring 323. Detailed implementation manners

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be described below in conjunction with the detailed implementation manners and the drawings.

[0021] Embodiment 1 As Figures 1 - 5 shown, a semi - automated aquaculture and harvesting device for single - oyster farming in the inner - bay sea area includes a water surface floating cage 10, a workboat 20, and a shuttle 30. The water surface floating cage includes a towing rope 101.

[0022] The workboat includes a hull 201, a first fixed column 202, a second fixed column 203, a bracket 204, a wire winder 205, a servo motor 206, and a spring buckle 207. The bracket connects the hull and the wire winder. The wire winder is arranged at the output end of the servo motor. The towing rope is wound around the wire winder. The first fixed column and the second fixed column are arranged in parallel on the same side of the hull. The first fixed column is arranged at the tail of the hull. The spring buckle is arranged below the hull. The towing rope passes through the spring buckle.

[0023] The shuttle includes a floating platform 301, a guiding frame, a guiding connecting rod 302, an adjusting frame, and two connecting rings. The two connecting rings are arranged on the side surface of the floating platform. The two connecting rings are respectively sleeved outside the first fixed column and the second fixed column. The guiding frame is arranged on the front side of the upper surface of the floating platform. The adjusting frame is arranged on the rear side of the upper surface of the floating platform. The guiding connecting rod connects the guiding frame and the adjusting frame. The guiding frame includes guard rails, guiding rods, a front fixed rod, and a rear fixed rod. The front fixed rod and the rear fixed rod are arranged in parallel on the floating platform. The guard rails connect the front fixed rod and the rear fixed rod. The guiding rods are arranged below the guard rails.

[0024] Specifically, the floating cage on the water surface is the core carrier for oyster farming, and its structural design is as follows.

[0025] Floating cage main body 102: The floating cage is made of high-density polyethylene material, with good corrosion resistance and durability. There is a plastic buoyancy block 103 above the floating cage to provide buoyancy and ensure that the floating cage floats on the water surface; on both sides of the middle position below the floating cage, there are rings 104 for connecting with plastic floating rods.

[0026] Floating balls 105 and main rope 106: The floating balls are set at both ends of the main rope and are connected by the main rope, playing a role in fixing and marking. The main rope is composed of several plastic floating rods 107, and adjacent plastic floating rods are connected by movable buckles 108, which can be flexibly increased or decreased according to the number of floating cages.

[0027] Traction rope: The traction rope is connected to two floating balls, with a length greater than that of the main rope and extending below the water surface, used for towing the floating cage during the harvesting process.

[0028] Flexibility of the floating cage: The floating cage is fixed on the plastic floating rod through the ring below. The diameter of the ring is slightly larger than that of the plastic floating rod, enabling the floating cage to rotate freely around the plastic floating rod. By regularly adjusting the up and down position of the floating cage main body, oysters can receive sunbathing periodically, improving the taste of oyster meat. At the same time, the natural waves drive the floating cage main body to shake, causing the oysters to rub against each other, playing a role in naturally polishing the shell shape and improving the quality and appearance of oysters. Cage doors 109 are provided on both sides of the floating cage main body, facilitating the feeding, harvesting, and daily inspection and maintenance of oysters.

[0029] The working boat is a mobile platform for harvesting operations, and its structural design is as follows.

[0030] Cockpit and power system: There is a cockpit 210 on the hull of the working boat. On one side of the stern at the rear of the hull, there is a diesel engine 208, and on the other side, there is a DC servo motor. The diesel engine is used to provide power for the movement of the hull. The DC servo motor is connected to the winch through a bracket and is used to control the retraction and release of the traction rope. The bracket is rotatably connected to the hull.

[0031] Motor controller and motor switch 209: There is a motor controller on the DC servo motor to adjust the forward direction and speed of the traction rope. The motor switch is set on the first fixed column through a wire to control the opening and closing of the servo motor, facilitating operation.

[0032] Fixed columns and adjustment devices: On one side of the ship's side of the working boat hull, the first fixed column and the second fixed column are arranged in parallel. The second fixed column is close to the bow, and the first fixed column is close to the stern. The first fixed column is connected to the winch bracket through an adjustment rope. The adjustment handle 211 on the first fixed column can adjust the height of the winch through the adjustment rope 212 to meet different operation requirements.

[0033] Snap Hook: A snap hook is provided under the bow of the working boat to fix the towing rope of the surface floating cage and ensure the advancing direction of the towing rope.

[0034] The shuttle is the key device for realizing the harvesting of the floating cage, and its structural design is as follows.

[0035] Surface Floating Platform: The shuttle is set on the surface floating platform. The length of the rear fixing rod is greater than that of the front fixing rod. The front fixing rod includes the first fixing rod 303, the second fixing rod 304, and the front connecting rod 305. The rear fixing rod includes the third fixing rod 306, the fourth fixing rod 307, and the rear connecting rod 308. The front connecting rod connects the first fixing rod and the second fixing rod, and the rear connecting rod connects the third fixing rod and the fourth fixing rod. One end of the guiding connecting rod is connected to the rear connecting rod.

[0036] Guard Rail and Guide Rod: The guard rail includes a left guard rail 309 and a right guard rail 310. The width between the left guard rail and the right guard rail is greater than the width of the floating cage. The left guard rail is connected to the tops of the first fixing rod and the third fixing rod, and the right guard rail is connected to the tops of the second fixing rod and the fourth fixing rod. The inclination angle between the guard rail and the floating platform is 45°. One end of the guard rail is straight, and a guiding arc is provided on the side close to the floating platform, and the guiding arc extends outward to the left and right sides of the floating platform.

[0037] The guide rod includes a left guide rod 311 and a right guide rod 312. The left guide rod is arranged under the left guard rail, and the right guide rod is arranged under the right guard rail. The distance between the left guide rod and the right guide rod is less than the distance between the left guard rail and the right guard rail. The near-water ends of the guide rods are bent inward and connected, and are arranged below the water surface. Specifically, the guide rod also includes a guide connecting rod 313. One end of the guide connecting rod is fixed at the midpoint of the front connecting rod. The near-water ends of the left guide rod and the right guide rod are bent inward and connected to the other end of the guide connecting rod to form a closed guide circle 314. The guide circle extends to the water surface and below the water surface to guide the moving direction of the floating cage. The end of the left guide rod far from the water surface is bent outward obliquely downward, and the end of the right guide rod far from the water surface is bent outward obliquely upward, and the two form a height difference to guide the rising and rotation of the floating cage.

[0038] Adjusting frame: The adjusting frame includes a protective frame and a gravity roller slideway 315. The protective frame includes adjusting fixed columns and guard plates. The adjusting fixed columns include a first adjusting fixed column 316, a second adjusting fixed column 317, a third adjusting fixed column 318, and a fourth adjusting fixed column 319 arranged in front of the water surface floating platform, and the four adjusting fixed columns have the same height. The guard plates include a left guard plate 320 and a right guard plate 321. The left guard plate is connected to the first and third adjusting fixed columns, and the right guard plate is connected to the second and fourth adjusting fixed columns. The left and right guard plates are parallel, and the width between the left and right guard plates is the same as the distance between the left and right guard rods. A number of gravity roller slideways are arranged in parallel below the left and right guard plates. A front adjusting connecting rod is provided between the first and second adjusting fixed columns, and a rear adjusting connecting rod is arranged between the third and fourth adjusting fixed columns. The front adjusting connecting rod, the rear adjusting connecting rod, and the gravity roller slideway have the same height. The middle of the front adjusting connecting rod and the rear connecting rod is connected by a guiding connecting rod to achieve the fast and stable conveying of the floating cage body and reduce the resistance.

[0039] Connecting rings: A first connecting ring 322 and a second connecting ring 323 are provided outside the water surface floating platform. The positions of the first and second connecting rings correspond to the first and second fixed columns of the working boat, and are used to connect the water surface floating platform to the working boat to ensure the stability of the harvesting process.

[0040] Embodiment 2 In the process of using Embodiment 1, it is mainly divided into the following stages.

[0041] Cultivation stage.

[0042] The water surface floating cage floats above the water surface under the action of floating balls, plastic buoyancy blocks, and plastic floating rods. The natural waves are used to polish and shape the oysters, so as to produce oysters with a smooth shape without the need for manual polishing again.

[0043] Turn the floating cage over regularly to increase sunlight exposure, improve the meat texture of the oysters, and further optimize the growth environment of the oysters.

[0044] Harvesting stage.

[0045] Connect the water surface floating platform to the first and second fixed columns of the working boat through the first and second connecting rings to ensure stable connection between the two.

[0046] Place the first floating cage body on the closed guiding ring, fix one end of the towing rope of the water surface floating cage in the spring buckle at the bow of the working boat, and the other end in the winding device.

[0047] Adjust the height of the winding device by adjusting the handle and the adjusting rope to tighten the towing rope. Turn on the servo motor switch, and the winding device starts to rotate, driving the towing rope forward.

[0048] Under the action of the towing rope, the floating cage main body slides forward, successively passing through the closed guiding ring, the guiding rod, the guiding connecting rod and the unpowered roller slideway, and finally leaves the floating platform and floats on the sea surface.

[0049] Under the action of the left guiding rod and the right guiding rod, the floating cage main body is in a vertical state, and the guiding connecting rod blocks the further rotation of the floating cage to ensure the stable ascent of the floating cage.

[0050] When the floating cage main body passes through the unpowered roller slideway, it realizes fast and stable transportation under the action of the rollers, reducing the resistance.

[0051] Workers can stand in front of the guiding connecting rod to carry out operations such as seedling loading, seedling sorting, cage cleaning or oyster harvesting. When loading and sorting seedlings, the upper cage door can be quickly opened to separately pack oyster seedlings into the floating cage; when cleaning the cage, it can be directly washed with a high-pressure water gun; when harvesting oysters, after opening the cage door and inverting it, the oysters can be quickly poured out.

[0052] Through the optimization of the design of the water surface floating cage, the working ship and the shuttle, the present invention realizes the semi-automatic operation of oyster cultivation and harvesting, has significant economic and social benefits, and can be widely applied to the oyster cultivation industry in the coastal inner bay waters.

[0053] The above embodiments are only for illustrating the structural concept and characteristics of the present invention, and are intended to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly, and should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the essence of the content of the present invention should be covered within the protection scope of the present invention.

Claims

1. A semi-automatic cultivation and harvesting device for single oyster cultivation in inner bay waters, characterized in that: It includes a water surface floating cage, an operation ship, and a shuttle. The water surface floating cage includes a towing rope; The operation ship includes a hull, a first fixed column, a second fixed column, a bracket, a wire winder, a servo motor, and a spring buckle. The bracket connects the hull and the wire winder. The wire winder is arranged at the output end of the servo motor. The towing rope is wound around the wire winder. The first fixed column and the second fixed column are arranged in parallel on the same side of the hull. The first fixed column is arranged at the tail of the hull. The spring buckle is arranged below the hull. The towing rope passes through the spring buckle; The shuttle includes a floating platform, a guide frame, a guiding connecting rod, an adjustment frame, and two connecting rings. The two connecting rings are arranged on the side surface of the floating platform. The two connecting rings are respectively sleeved on the outer sides of the first fixed column and the second fixed column. The guide frame is arranged on the front side of the upper surface of the floating platform. The adjustment frame is arranged on the rear side of the upper surface of the floating platform. The guiding connecting rod connects the guide frame and the adjustment frame. The guide frame includes a guard rod, a guide rod, a front fixed rod, and a rear fixed rod. The front fixed rod and the rear fixed rod are arranged in parallel on the floating platform. The guard rod connects the front fixed rod and the rear fixed rod. The guide rod is arranged below the guard rod.

2. The semi-automated aquaculture and harvesting device for single oyster farming in the inner bay waters according to claim 1, wherein: It is rotatably connected with the hull. The operation ship also includes an adjusting rope and an adjusting handle. The adjusting handle is slidably arranged on the first fixed column. The adjusting rope connects the bracket and the adjusting handle.

3. The semi-automated aquaculture and harvesting device for single oyster farming in inner bay waters according to claim 1, characterized in that: The length of the rear fixed rod is greater than that of the front fixed rod. The front fixed rod includes a first fixed rod, a second fixed rod, and a front connecting rod. The rear fixed rod includes a third fixed rod, a fourth fixed rod, and a rear connecting rod. The guard rod includes a left guard rod and a right guard rod. The front connecting rod connects the first fixed rod and the second fixed rod. The rear connecting rod connects the third fixed rod and the fourth fixed rod. One end of the guiding connecting rod is connected to the rear connecting rod. The left guard rod is connected to the tops of the first fixed rod and the third fixed rod. The right guard rod is connected to the tops of the second fixed rod and the fourth fixed rod.

4. The semi-automated cultivation and harvesting device for single oyster cultivation in the inner bay sea area according to claim 3, characterized in that: The included angle between the guard rod and the floating platform is 45°. A guiding arc is arranged on the side of the guard rod close to the floating platform, and the guiding arc extends outward from the floating platform.

5. The semi-automated cultivation and harvesting device for single oyster cultivation in inner bay waters according to claim 3, wherein: The guide rod includes a left guide rod and a right guide rod. The left guide rod is arranged below the left guard rod. The right guide rod is arranged below the right guard rod. The distance between the left guide rod and the right guide rod is less than the distance between the left guard rod and the right guard rod.

6. The semi-automated cultivation and harvesting device for single oyster cultivation in inner bay waters according to claim 5, characterized in that: The guide rod also includes a guiding connecting rod. One end of the guiding connecting rod is fixed at the midpoint of the front connecting rod. The near-water ends of the left guide rod and the right guide rod are bent inward and connected to the other end of the guiding connecting rod to form a closed guiding circle. The guiding circle extends to below the water surface. The end of the left guide rod away from the water surface bends obliquely downward, and the end of the right guide rod away from the water surface bends obliquely upward.

7. The semi - automated cultivation and harvesting device for single - oyster cultivation in the inner - bay sea area according to claim 3, characterized in that: The adjustment frame includes a protective frame and a gravity roller slideway. Parallel protective plates are provided on both sides of the protective frame. The gravity roller slideway is arranged inside the protective frame between the protective plates. The distance between the protective plates is the same as the distance between the left protective rod and the right protective rod.

8. The semi-automated cultivation and harvesting device for single oyster cultivation in the inner bay sea area according to claim 1, characterized in that: The water surface floating cage further includes a floating cage main body, buoyancy blocks, floating balls, and a main rope. The buoyancy blocks are arranged above the floating cage main body. The floating balls are arranged at both ends of the main rope. The buoyancy blocks are distributed on the main rope. Both ends of the traction rope are connected to the floating balls. The length of the traction rope is greater than the length of the main rope.

9. The semi-automated cultivation and harvesting device for single oyster cultivation in the inner bay sea area according to claim 8, wherein: The main rope includes plastic floating rods and movable buckles. The movable buckles are arranged at both ends of the plastic floating rods. The plastic floating rods are connected into a main rope through the movable buckles. Rings are arranged on both sides of the middle part below the floating cage main body. The floating cage main body is connected to the plastic floating rods through the rings. The aperture of the rings is larger than the outer diameter of the plastic floating rods. The floating cage main body can rotate around the plastic floating rods. Cage doors are arranged on both sides of the floating cage main body.

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