Courtyard type crab, vegetable and shellfish three-dimensional symbiotic breeding device and method based on tidal system

Abstract

The invention discloses a courtyard type crab, vegetable and shellfish three-dimensional symbiotic culture device and method based on a tidal system, and relates to the technical field of aquaculture and agricultural ecology. The courtyard type crab, vegetable and shellfish three-dimensional symbiotic culture device comprises a culture pond internally provided with a plurality of crab and vegetable culture frames, and a bottom filter located below the culture pond; the crab vegetable breeding frame comprises a crab hole frame and a vegetable planter fixed above the crab hole frame, and a replaceable crab hole device is arranged in the crab hole frame; the bottom filter tank is divided into a shellfish culture area, a sediment filtering area, an algae culture area and a water pump area which are sequentially communicated through a plurality of partition plates, a plurality of shellfish culture frames are arranged in the shellfish culture area, the output end of water pumping equipment in the water pump area is communicated with the culture pond through a water inlet pipe, and the culture pond is communicated with the shellfish culture area through a water drainage pipe. The orifice of the drain pipe in the culture pond is lower than the highest point of the drain pipe; and the drain flow of the drain pipe is greater than the water inlet flow of the water inlet pipe. The method comprises the step of culturing corresponding culture objects in each area. The method adapts to courtyard scenes, is low in cost and low in emission, and has certain ornamental value.

Description

Technical Field

[0001] This invention relates to the fields of aquaculture and agricultural ecology, and in particular to a courtyard-style three-dimensional symbiotic aquaculture device and method for crabs, vegetables and shellfish based on a tidal system. Background Technology

[0002] As residents' demand for high-quality aquatic products and green vegetables continues to increase, family farming and small-scale ecological planting are gradually becoming emerging demands. However, traditional farming methods and existing symbiotic models have many shortcomings and cannot meet the application requirements of high efficiency, environmental protection and adaptability to backyard scenarios.

[0003] In traditional aquaculture of crustaceans and filter-feeding organisms such as mud crabs and shellfish, key issues are prominent: First, water quality control is difficult. Uneaten feed and excrement during the farming process can easily lead to eutrophication of the water body, requiring frequent water changes, which not only wastes water resources but also increases the risk of disease transmission. Second, space utilization is low. Traditional aquaculture often adopts a single planar water body layout and does not develop the vertical dimension of small spaces such as courtyards, limiting the output efficiency per unit area. Third, it is highly dependent on the environment. Natural aquaculture is significantly affected by seasons and climate. Fluctuations in water temperature and salinity can easily reduce the survival rate of farmed organisms, while artificial constant temperature and salinity equipment is expensive and not suitable for home settings.

[0004] While existing symbiotic models such as aquaponics and rice-shrimp co-cultivation have made breakthroughs in ecological cycles, they still have significant drawbacks. On the one hand, the symbiotic organisms are limited to a single species. Most models only achieve bidirectional symbiosis between fish and vegetables, without incorporating filter-feeding organisms such as shellfish. This results in the inability to fully utilize plankton and organic debris in the water, leading to an incomplete ecological chain and low material cycling efficiency. On the other hand, the environmental simulation is low. Existing models mostly use static water bodies or simple water cycles, without considering the dependence of crabs and shellfish on the natural tidal environment. Crabs need tidal currents to stimulate molting and foraging, while shellfish need tidal changes to filter feed and respire. Static environments can easily lead to slow growth and decreased quality.

[0005] Furthermore, existing symbiotic technologies are mostly designed for large-scale farms or livestock farms, with large equipment, complex installation, and high costs, making them difficult to adapt to backyard settings. Backyard farming has limited space, and users are mostly non-professionals. Practicality, aesthetics, and ease of operation need to be considered, but existing technologies cannot meet the needs of miniaturization, nor do they take into account the requirements of home users for low maintenance and high safety, making it difficult for backyard ecological farming to become widespread. Summary of the Invention

[0006] The purpose of this invention is to provide a courtyard-style crab-vegetable-shell clam three-dimensional symbiotic aquaculture device and method based on a tidal system, so as to solve the problems existing in the prior art, achieve adaptability to courtyard scenes, low cost, low emissions, simple operation, high simulation of natural ecological environment and high space utilization, and also have certain ornamental value.

[0007] To achieve the above objectives, the present invention provides the following solution: This invention provides a courtyard-style three-dimensional symbiotic aquaculture device for crabs, vegetables, and shellfish based on a tidal system, comprising: an aquaculture pond containing multiple crab-vegetable cultivation racks, each rack including a crab-hole frame and a vegetable planter fixed above the crab-hole frame; the crab-hole frame contains replaceable crab-hole devices; a bottom filter pond located below the aquaculture pond, the bottom filter pond being divided by multiple partitions into sequentially connected shellfish cultivation area, sedimentation and filtration area, algae cultivation area, and water pump area; the output end of the pumping equipment in the water pump area is connected to the aquaculture pond via an inlet pipe; multiple shellfish cultivation racks are provided in the shellfish cultivation area; the aquaculture pond is connected to the shellfish cultivation area via a drain pipe, the drain pipe's opening in the aquaculture pond being lower than its highest point, and the drain flow rate of the drain pipe being greater than the inlet flow rate of the inlet pipe.

[0008] Preferably, the shellfish farming area and the sedimentation and filtration area are connected by a bottom drainage hole group; the sedimentation and filtration area and the algae farming area are connected by a top drainage hole group, the top drainage hole group being higher than the bottom drainage hole group, and the bottom drainage hole group being close to the bottom of the bottom filter tank.

[0009] Preferably, the shellfish farming rack includes a stainless steel frame and multiple stainless steel meshes; each stainless steel mesh is arranged sequentially at intervals along the vertical direction and fixedly connected to the stainless steel frame; a farming space for placing bivalve shellfish is formed between two adjacent stainless steel meshes.

[0010] Preferably, water baffles are fixedly fixed in a staggered manner on two opposite inner walls on both sides of the water flow path in the algae cultivation area. One end of each water baffle is fixedly connected to its corresponding inner wall, and the other end is spaced apart from the opposite inner wall. Multiple layers of filter media are laid in the algae cultivation area, and large algae are planted on top of the filter media.

[0011] Preferably, multiple hanging rods are fixed in the sedimentation and filtration zone, and multiple biological brushes are hung on each hanging rod.

[0012] Preferably, the vegetable planter is enclosed on all sides and has multiple drainage holes at its bottom. A planting plate is provided above each drainage hole, and multiple sets of planting holes are provided on the planting plate. The breeding pond has a main water inlet pipe and multiple branch water inlet pipes. The water inlet end of the main water inlet pipe is connected to the end of the main water inlet pipe. Each branch water inlet pipe corresponds to a vegetable planter and is located inside the vegetable planter above the planting plate. Each branch water inlet pipe is connected to the main water inlet pipe.

[0013] Preferably, multiple layers of filter material are laid between the drainage hole and the planting board.

[0014] Preferably, the aquaculture pond and the bottom filter pond are the same size in the vertical projection direction.

[0015] The present invention also provides a method for using a courtyard-style crab-vegetable-shell clam three-dimensional symbiotic aquaculture device based on a tidal system as described in any of the preceding claims, comprising the following steps: S1, vegetables are planted in each of the vegetable planters, and crabs to be raised are placed in the breeding pond. The crab burrowing device on each of the crab burrowing racks provides a place for the crabs to hide and rest. S2, place shellfish to be cultured in the shellfish culture area and place algae to be cultured in the algae culture area; S3, start the water pumping equipment so that water in the pumping area continuously flows into the aquaculture pond through the inlet pipe; when the water level in the aquaculture pond reaches the highest point of the drain pipe, the drain pipe is triggered to generate a siphon effect, and the water in the aquaculture pond is automatically discharged into the bottom filter tank through the drain pipe until the water level in the aquaculture pond is lower than the height of the drain pipe opening in the aquaculture pond, and the siphon effect of the drain pipe disappears.

[0016] Preferably, in S1, different crab burrowing devices are replaced in a timely manner according to the size of the crabs to be farmed.

[0017] The present invention achieves the following technical effects compared to the prior art: This invention provides a courtyard-style crab-vegetable-shell clam symbiotic aquaculture device based on a tidal system. The device integrates upper vegetable growers with lower crab burrowing racks within the aquaculture pond. A bottom filter pond is located below the aquaculture pond and includes a shellfish aquaculture area, a sedimentation and filtration area, an algae aquaculture area, and a water pump area, forming a vertical aquaculture model that effectively improves the utilization rate of unit space and breaks through the limitations of traditional single-planar layouts. The aquaculture pond and the bottom filter pond are connected by inlet and outlet pipes. The pumping equipment continuously supplies water, and the drainage flow rate is greater than the inlet flow rate, with the outlet lower than the highest point of the outlet pipe, creating tidal water level changes that simulate a natural tidal environment, satisfying the needs of crabs molting and foraging, and shellfish... The filter-feeding and respiration requirements of this system address the issue of low environmental simulation in existing symbiotic models. The shellfish farming area, sedimentation and filtration area, and algae farming area in the bottom filter pond are sequentially connected. Shellfish can filter uneaten food and organic debris from the water, the sedimentation and filtration area can intercept solid impurities, and algae can absorb nutrients from the water. The water is then circulated through the pump area, eliminating the need for frequent water changes. This solves the problem of eutrophication and reduces water waste and the risk of disease transmission. At the same time, the overall device has a compact structure and high component integration. The crab burrowing device in the crab burrow rack can be replaced as needed, making it easy to operate and fully adaptable to the needs of small backyard spaces and non-professional users. It overcomes the difficulties of existing technologies being bulky, complex to install, and difficult to popularize.

[0018] This invention also provides a method for a courtyard-style three-dimensional symbiotic aquaculture device for crabs, vegetables, and shellfish based on a tidal system. By automatically generating periodic tidal water level changes, it not only meets the growth needs of crabs and shellfish for the natural tidal environment, promoting their growth, development, and quality improvement, but also drives the water in the aquaculture pond into the bottom filter pond to complete purification and circulation, reducing water waste and the risk of disease transmission. The overall method is simple to operate and suitable for the application needs of small-scale, non-professional aquaculture scenarios such as courtyards. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of the courtyard-style crab-vegetable-shell three-dimensional symbiotic aquaculture device based on a tidal system provided by the present invention; Figure 2 This is a schematic diagram of the structure of the aquaculture pond in the courtyard-style crab-vegetable-shell three-dimensional symbiotic aquaculture device based on a tidal system provided by the present invention. Figure 3This is a schematic diagram of the crab and vegetable farming rack without the planting board in the courtyard-style crab, vegetable and shellfish three-dimensional symbiotic farming device based on a tidal system provided by the present invention. Figure 4 A schematic diagram of the structure of the crab and vegetable cultivation rack with a planting board in the courtyard-style crab, vegetable and shellfish three-dimensional symbiotic aquaculture device based on a tidal system provided by the present invention. Figure 5 This is a schematic diagram of the bottom filter tank in the courtyard-style crab-vegetable-shell clam three-dimensional symbiotic aquaculture device based on a tidal system provided by the present invention.

[0021] In the picture: 100-Bottom filter tank; 110-Shellfish farming area; 111-Shellfish farming rack; 120-Sedimentation and filtration area; 121-Hanging pole; 130-Algae farming area; 140-Pump area; 141-Pumping equipment; 200-Aquaculture pond; 210-Water inlet pipe; 220-Crab and vegetable farming rack; 221-Crab burrow rack; 222-Vegetable planter; 223-Drainage hole; 224-Planting board; 225-Planting hole; 230-Drainage pipe. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The purpose of this invention is to provide a courtyard-style crab-vegetable-shell clam three-dimensional symbiotic aquaculture device and method based on a tidal system, so as to solve the problems existing in the prior art, achieve adaptability to courtyard scenes, low cost, low emissions, simple operation, high simulation of natural ecological environment and high space utilization, and also have certain ornamental value.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1 This embodiment provides a courtyard-style crab-vegetable-shell clam integrated symbiotic aquaculture device based on a tidal system, mainly but not limited to applications in small-scale aquaculture scenarios such as family courtyards and small farms. Figures 1-5 As shown, it includes: The breeding pond 200 contains multiple crab and vegetable breeding racks 220 (each crab and vegetable breeding rack 220 is placed in parallel within the breeding pond 200). Each crab and vegetable breeding rack 220 includes a crab burrow rack 221 and a vegetable planter 222 fixed above the crab burrow rack 221 (aquatic emergent plants are planted in the vegetable planter 222); the crab burrow rack 221 is equipped with a replaceable crab burrower. A bottom filter tank 100 is located below the aquaculture tank 200. The bottom filter tank 100 is divided by multiple partitions and is connected in sequence to a shellfish aquaculture zone 110, a sedimentation and filtration zone 120, an algae aquaculture zone 130, and a water pump zone 140. The output end of the water pumping equipment 141 (such as a water pump) in the water pump zone 140 is connected to the aquaculture tank 200 through an inlet pipe 210. Multiple shellfish aquaculture racks 111 are provided in the shellfish aquaculture zone 110. The aquaculture tank 200 is connected to the shellfish aquaculture zone 110 through a drain pipe 230. The opening of the drain pipe 230 in the aquaculture tank 200 is lower than the highest point of the drain pipe 230, and the drainage flow rate of the drain pipe 230 is greater than the inlet flow rate of the inlet pipe 210.

[0026] The crab-vegetable cultivation rack 220 built into the aquaculture pond 200 integrates the upper vegetable planter 222 with the lower crab burrow rack 221. The bottom filter pond 100 is located below the aquaculture pond 200 and is equipped with a shellfish cultivation area 110, a sedimentation and filtration area 120, an algae cultivation area 130, and a water pump area 140, forming a three-dimensional symbiotic vertical aquaculture model of crabs, vegetables, and shellfish. This effectively improves the utilization rate of unit space and breaks through the limitations of the traditional single planar layout. The aquaculture pond 200 and the bottom filter pond 100 are connected by an inlet pipe 210 and an outlet pipe 230. The water pump 141 continuously supplies water, and the drainage flow rate of the outlet pipe 230 is greater than the inlet flow rate of the inlet pipe 210, and the outlet of the outlet pipe is lower than the highest point of the outlet pipe 230, which can form tidal water level changes, simulate the natural tidal environment, and meet the needs of crabs molting and foraging. The device addresses the growth needs of shellfish through filter feeding and respiration, solving the problem of low environmental simulation in existing symbiotic models. The shellfish farming area 110, sedimentation and filtration area 120, and algae farming area 130 in the bottom filter tank 100 are sequentially connected. Shellfish can filter uneaten food and organic debris from the water, sedimentation and filtration area 120 can intercept solid impurities, and algae can absorb nutrients from the water. The water is then circulated through the water pump area 140, eliminating the need for frequent water changes. This solves the problem of eutrophication and reduces water waste and the risk of disease transmission. At the same time, the overall device has a compact structure and high component integration. The crab burrowing device in the crab burrow rack 221 can be replaced as needed, making it easy to operate and fully adaptable to the needs of small backyard spaces and non-professional users. It overcomes the difficulties of existing technologies being large in size, complex in installation, and difficult to popularize.

[0027] Specifically, by simulating the natural tidal environment, a three-dimensional aquaculture system is constructed that integrates crabs, vegetables, and shellfish to achieve water resource recycling, resource conversion of aquaculture waste, and improved output per unit space.

[0028] The following are the relevant setup instructions for the 200 aquaculture pond: Specifically, the vegetable planter 222 and the crab burrow frame 221 are two parts of one unit. The crab burrow devices on the crab burrow frame 221 are existing equipment for crabs to hide and inhabit, which will not be described in detail. They can be disassembled and replaced with different sizes according to the breeding needs (different sizes of crab burrow devices can be replaced according to the crab growth cycle).

[0029] Specifically, the water supplied by the inlet pipe 210 enters the vegetable planter 222 to provide water for the vegetables.

[0030] Among the optional solutions in this embodiment, the more preferred one is as follows: Figures 1-4 As shown, the vegetable planter 222 is enclosed on all sides and has multiple drainage holes 223 at its bottom. Above each drainage hole 223 is a planting plate 224, on which multiple sets of planting holes 225 are opened. The breeding pond 200 has a main water inlet pipe and multiple branch water inlet pipes. The water inlet end of the main water inlet pipe is connected to the end of the water inlet pipe 210 (in practice, the main water inlet pipe and the water inlet pipe 210 can be integrated). The branch water inlet pipes correspond one-to-one with the vegetable planter 222. The branch water inlet pipes are located inside the vegetable planter 222 above the planting plate 224, and each branch water inlet pipe is connected to the main water inlet pipe.

[0031] In the optional solutions of this embodiment, it is more preferred that multiple layers of filter material are laid between the drainage hole 223 and the planting plate 224 (different filter materials can be laid to support the planting plate 224 according to actual needs, and the filter material should have both water permeability and moisture retention).

[0032] In the optional schemes of this embodiment, it is more preferred that the aquaculture pond 200 and the bottom filter pond 100 are the same size in the vertical projection direction.

[0033] Specifically, the drain pipe 230 has an approximately "U"-shaped structure. Through the bends of the drain pipe 230, when the water level in the aquaculture pond 200 reaches the highest point of the drain pipe 230, the water in the aquaculture pond 200 begins to be discharged from the drain pipe 230 to the bottom filter 100. When the water level in the aquaculture pond 200 is lower than the lowest point of the drain pipe 230 (i.e., the pipe opening position inside the aquaculture pond 200), the drainage stops until the water level returns to the highest point of the drain pipe 230.

[0034] The following are the relevant settings for the bottom filter tank 100: Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 5As shown, the shellfish farming area 110 and the sedimentation and filtration area 120 are connected by a bottom drainage hole group; the sedimentation and filtration area 120 and the algae farming area 130 are connected by a top drainage hole group. The top drainage hole group is higher than the bottom drainage hole group, and the bottom drainage hole group is close to the bottom of the bottom filter tank 100.

[0035] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 5 As shown, the shellfish culture rack 111 includes a stainless steel frame and multiple stainless steel meshes; the stainless steel meshes are arranged sequentially at intervals along the vertical direction and fixedly connected to the stainless steel frame; a culture space for placing bivalve shellfish is formed between two adjacent stainless steel meshes. Each layer of the shellfish culture rack 111 is composed of perforated stainless steel mesh to ensure that each shellfish can have full contact with the water flow.

[0036] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 5 As shown, on the two inner walls opposite each other on both sides of the water flow path within the algae cultivation area 130, water baffles are fixed alternately at intervals (i.e., as shown in the diagram). Figure 1 As shown, a baffle plate on one inner wall is located between two baffle plates on opposite inner walls. One end of the baffle plate is fixedly connected to the inner wall it is on, and the other end has a gap between it and the opposite inner wall. Multiple layers of filter media are laid within the algae cultivation area 130, with large algae planted on top of the filter media. The water flows in a zigzag pattern through alternating openings in different directions on the baffle plates, increasing the area through which the water flows. Multiple layers of filter media are placed inside, with large algae planted on top of the filter media to further intercept and absorb nutrients and solid particles in the water.

[0037] Among the optional solutions in this embodiment, the more preferred one is as follows: Figure 1 and Figure 5 As shown, multiple hanging rods 121 are fixed within the sedimentation and filtration zone 120, and multiple biological brushes are attached to each hanging rod 121 (each biological brush is hung parallel to the hanging rod 121). This achieves the effect of slowing down the water flow to settle large suspended particles, while simultaneously cultivating biological flocs to further purify the water quality.

[0038] Specifically, the purified water is pumped back to the aquaculture pond 200 from the inlet pipe 210 by the water pump in the water pump area 140 of the bottom filter pond 100.

[0039] Specifically, multiple zones are set up in the bottom filter tank 100 using partitions, shellfish culture racks 111 are placed in the shellfish culture zone 110, multiple sets of biological brushes are placed in the sedimentation and filtration zone 120, and filter media are laid and large algae are planted in the algae culture zone 130 to purify the water quality through biological and ecological treatment.

[0040] Regarding other relevant explanations: Specifically, water is supplied to the vegetable grower 222 through the inlet pipe 210 to keep the vegetable grower 222 moist, and the water is discharged from the drain hole 223 below the vegetable grower 222; the water flows through the crab burrow below the crab vegetable farming rack 220 to flush out residual feed and feces inside; the outlet of the drain pipe 230 of the farming pond 200 is far below the outlet position, and the water level is drained downwards when it is higher than the outlet position, and the drainage stops when it is lower than the outlet of the drain pipe 230 until the water level is higher than the outlet position again, thus simulating the rise and fall of the water level during the tide; the water flows through the drain pipe 230 to the bottom filter tank 100 below; the shellfish farming area 110 in the bottom filter tank 100 absorbs large protein debris in the water, the sedimentation tank intercepts solid impurities in the water, and the algae farming area 130 absorbs inorganic salts and some suspended solids in the water. Finally, the farming water is pumped back to the farming pond 200 through a water pump.

[0041] Specifically, the courtyard-style crab-vegetable-shell clam integrated symbiotic aquaculture device based on a tidal system in this embodiment has at least the following beneficial effects: 1. Compared with existing single crab farming systems, its designed crab, vegetable and shellfish ecological symbiosis not only increases production output and variety per unit area, but also utilizes aquatic emergent plants, shellfish and algae to absorb and degrade water pollutants generated during the farming process, thereby increasing economic output while achieving green recirculating aquaculture.

[0042] 2. Compared with existing single shellfish, algae and emergent aquatic plant aquaculture systems, the shellfish absorb organic particles from the uneaten feed and feces produced by crab farming, while the algae and emergent aquatic plants absorb nutrients from the water for growth and development, which greatly saves on artificial feeding and management costs.

[0043] 3. Its design of inlet and outlet water pipes enables the water level to rise and fall within the aquaculture system, providing a tidal environment for crabs, shellfish, algae, and emergent aquatic plants. This better simulates the growth state of organisms in their natural environment and promotes their growth and development.

[0044] 4. Its multi-organism three-dimensional ecological breeding and modular ecological breeding model can not only enhance economic value, but also have a certain ornamental value.

[0045] Example 2 A method for a courtyard-style crab-vegetable-shell clam integrated symbiotic aquaculture device based on a tidal system, as described above, includes the following steps: S1, vegetables are planted in each vegetable planter 222, and crabs to be raised are placed in the breeding pond 200. The crab burrowing device on each crab burrowing frame 221 provides a place for the crabs to hide and rest. S2, place shellfish to be cultured in shellfish culture area 110, and place algae to be cultured in algae culture area 130; S3, start the water pumping equipment 141 so that the water in the pumping area 140 continuously flows into the aquaculture pond 200 through the inlet pipe 210; when the water level in the aquaculture pond 200 reaches the highest point of the drain pipe 230, the drain pipe 230 is triggered to generate a siphon effect (by using the height difference between the drain pipe 230 opening and the highest point to trigger the siphon effect), and the water in the aquaculture pond 200 is automatically discharged from the drain pipe 230 into the bottom filter tank 100 until the water level in the aquaculture pond 200 is lower than the height of the drain pipe 230 opening in the aquaculture pond 200, and the siphon effect of the drain pipe 230 disappears.

[0046] By automatically generating periodic tidal water level changes, it not only meets the growth needs of crabs and shellfish for the natural tidal environment, promoting their growth, development and quality improvement, but also drives the water in the breeding pond 200 into the bottom filter pond 100 to complete purification and circulation, reducing water waste and the risk of disease transmission. The overall method is simple to operate and suitable for application needs in small-scale non-professional breeding scenarios such as backyards.

[0047] In the optional schemes of this embodiment, it is more preferred that in S1, different crab burrowing devices are replaced in a timely manner according to the size of the crabs to be farmed.

[0048] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A three-dimensional symbiotic aquaculture device for cultivating oysters and crabs in a garden based on a tidal system, characterized in that: The application relates to a crab-vegetable cultivation device. The device comprises a cultivation pool, a bottom filter pool and a plurality of crab-vegetable cultivation racks. The cultivation pool is provided with a plurality of crab-vegetable cultivation racks, each of which comprises a crab hole rack and a vegetable planting device fixed above the crab hole rack. The bottom filter pool is located below the cultivation pool and is provided with a shellfish cultivation area, a sedimentation and filtration area, an algae cultivation area and a water pump area in sequence through a plurality of partitions.

2. The three-dimensional symbiotic aquaculture device for garden crab and seaweed according to claim 1, characterized in that: The output end of a pump in the water pump area is connected with the cultivation pool through a water inlet pipe.

3. The three-dimensional symbiotic aquaculture device of claim 1, wherein: The shellfish cultivation area is provided with a plurality of shellfish cultivation racks. The cultivation pool is connected with the shellfish cultivation area through a drainage pipe.

4. The three-dimensional symbiotic aquaculture device of claim 1, wherein: The drainage pipe is located in the cultivation pool and the highest point of the drainage pipe is lower than the outlet of the cultivation pool.

5. The three-dimensional mutualistic aquaculture device for cultivating crabs and seaweed in a yard based on tidal systems according to claim 1, characterized in that: The drainage flow of the drainage pipe is greater than the water inlet flow of the water inlet pipe. The shellfish cultivation rack comprises a stainless steel frame and a plurality of stainless steel nets.

6. The three-dimensional symbiotic aquaculture device of claim 5, wherein: Each of the stainless steel nets is fixedly connected with the stainless steel frame and is arranged in the vertical direction.

7. The three-dimensional mutualistic aquaculture system of the tidal system based on the courtyard crab menu Baireniguan device according to claim 1, characterized in that: The cultivation space for placing bivalves is formed between two adjacent stainless steel nets.

8. A method for using the three-dimensional symbiotic aquaculture device for garden crab and seaweed according to any one of claims 1-7, characterized in that: The algae cultivation area is provided with a plurality of filter materials and large algae are planted above the filter materials. The sedimentation and filtration area is provided with a plurality of hanging rods and a plurality of biological brushes are hung on the hanging rods. The vegetable planting device is closed and is provided with a plurality of drainage holes. The vegetable planting device is provided with a planting plate above each of the drainage holes. The cultivation pool is provided with a water inlet main pipe and a plurality of water inlet branch pipes. The water inlet end of the water inlet main pipe is connected with the water inlet pipe. The water inlet branch pipe is connected with the vegetable planting device. The water inlet branch pipe is located in the vegetable planting device above the planting plate. The drainage hole and the planting plate are provided with a plurality of filter materials. The cultivation pool and the bottom filter pool are the same in size in the vertical projection direction. The device comprises the following steps: S1, planting vegetables in each of the vegetable planting devices and placing crabs to be cultivated in the cultivation pool. S2, placing shellfish to be cultivated in the shellfish cultivation area and placing algae to be cultivated in the algae cultivation area. S3, starting the water pumping device to make the water in the water pump area continuously flow into the culture pond through the water inlet pipe; when the water level in the culture pond reaches the highest point of the drain pipe, triggering the drain pipe to generate siphon effect, the water in the culture pond is automatically drained into the bottom filter tank through the drain pipe until the water level in the culture pond is lower than the height of the drain pipe opening in the culture pond, and the siphon effect of the drain pipe disappears.

9. The method of claim 8, wherein: In S1, according to the size of the crab to be bred, different crab hole devices are replaced in time.

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