Rice and fish facility cultivation system

Abstract

The utility model relates to the field of aquaculture equipment, in particular to a facility aquaculture system for rice and fish. The system comprises a rice field, a water inlet channel, a water outlet channel and an aquaculture device, the two ends of the water inlet channel are connected with the rice field and the aquaculture device respectively, the two ends of the water outlet channel are connected with the aquaculture device and the rice field respectively, and water circulation between the rice field and the aquaculture device is achieved. The aquaculture device comprises a frame, an aquaculture pond, a cleaning device and a filtering device. The filtering device is used for filtering water entering the rice field and respectively conveying the filtered water to the aquaculture pond and the cleaning device. The independent aquaculture device is arranged, water entering the rice field is filtered through the filtering device, and therefore the technical problem that in the prior art, water in the rice field is directly used for breeding aquatic animals in a rice and fish comprehensive breeding system, and the breeding environment of the aquatic animals is not easy to control is solved. The yield and quality of rice and aquatic animals are improved at the same time.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture equipment, specifically to a rice-fish integrated aquaculture system. Background Technology

[0002] Rice-fish integrated farming is a method of aquaculture in which rice and aquatic animals are raised together in the same paddy field. It has already captured a significant share of the market. Currently, rice-fish integrated farming mainly focuses on rice-shrimp and rice-fish farming, with the main production season for rice-shrimp farming lasting from after the Spring Festival until around the summer solstice in May or June, at which point the farming essentially ends. However, current technology does not yet utilize the period from rice planting to harvest in rice paddies.

[0003] Traditional integrated rice-fish farming mainly includes the following models: 1. Rice-fish rotation farming: This involves alternating rice and fish farming in paddy fields, using rice straw and fish excrement as organic fertilizers to improve soil fertility and increase the yield of both rice and fish. The disadvantages of this model are its long farming cycle, the inability of rice and fish farming periods to overlap, resulting in low paddy field utilization, and limitations on the types and sizes of fish that can meet market demand. 2. Rice-fish symbiotic farming: This involves simultaneously raising rice and fish in paddy fields, using rice roots to provide oxygen for the fish, while fish excrement provides nitrogen fertilizer for rice growth, achieving a mutually beneficial symbiosis. However, this model suffers from the inconsistency in growth conditions between rice and fish, requiring precise control of water level, temperature, and quality during symbiotic farming. Furthermore, the density and types of fish are also limited, preventing the achievement of higher economic benefits.

[0004] Therefore, while traditional rice-fish integrated farming systems have many advantages, they also have many drawbacks. For example, regardless of the specific method used, aquatic animals are raised directly in the water of the rice paddies. However, the water in rice paddies is easily affected by environmental and other factors, causing the various substances in the water to change constantly. Consequently, the aquatic animal farming environment is also constantly changing, and these changes are difficult to control, thus affecting the growth and development of the aquatic animals. Utility Model Content

[0005] In order to solve the technical problem that the existing rice-fish integrated aquaculture system uses water from rice paddies directly to raise aquatic animals, making it difficult to control the aquatic animal farming environment, this utility model provides a facility-based rice-fish aquaculture system.

[0006] This utility model is achieved using the following technical solution: a rice-fish integrated aquaculture system, comprising a paddy field, an inlet ditch, an outlet ditch, and an aquaculture device. The inlet ditch connects the paddy field and the aquaculture device at both ends, and is used to transport the wastewater from the aquaculture to the paddy field. The outlet ditch connects the aquaculture device and the paddy field at both ends, and is used to re-transport the water from the paddy field back to the aquaculture device. The aquaculture device includes a frame, an aquaculture pond, a cleaning device, and a filtration device. The aquaculture pond, the cleaning device, and the filtration device are sequentially installed on the frame. The filtration device includes multiple filter screens. The inlet end of the filtration device is connected to the outlet ditch, and the multiple filter screens are used to filter the water discharged from the outlet ditch. The outlet end of the filtration device is connected to the aquaculture pond and the cleaning device, and the filtered water is transported to the aquaculture pond and the cleaning device respectively. The cleaning device includes a shell, cleaning components, and wastewater. The housing includes a collection tank and a cleaning chamber for holding the filter screen. A cleaning assembly is installed on the inner wall of the housing, with its inlet connected to the outlet of the filter device and its outlet aligned with the filter screen placed in the cleaning chamber. A wastewater collection tank is installed on the lower end face of the frame and below the cleaning chamber. The frame inside the cleaning chamber has multiple through holes that connect the cleaning chamber and the wastewater collection tank. Wastewater from cleaning the filter screen in the cleaning chamber flows into the wastewater collection tank through the through holes.

[0007] As a further improvement of this utility model, the filter device has a number of slots that are the same as the number of filter screens. The multiple slots are arranged sequentially from top to bottom along the height direction of the filter device, and each filter screen is inserted into its respective slot.

[0008] As a further improvement of this utility model, the filter screen includes a filter screen plate and a push-pull plate. The push-pull plate is fixedly installed at one end of the filter screen plate. The length of the filter screen plate in the movement direction of the slot is greater than the length of the slot. The projected area of ​​the push-pull plate along the movement direction of the slot is greater than the projected area of ​​the filter screen plate in the movement direction of the slot. The filter screen is inserted into the slot, and the push-pull plate is located outside the filter device.

[0009] As a further improvement of this utility model, the filter screen located in the cleaning chamber is vertically arranged, and the lower end face of the filter screen faces the cleaning component, so that the cleaning component backwashes the filter screen.

[0010] As a further improvement of this utility model, a slot and a limiting channel are provided on one side wall of the housing. One end of the limiting channel is connected to the cleaning chamber, and the other end of the limiting channel is connected to the slot, which is located inside the cleaning chamber. The width of the limiting channel is equal to the thickness of the filter plate, and the limiting channel is used to limit the thickness of the filter plate located inside the cleaning chamber. The length of the slot is equal to the height of the push-pull plate, and the slot is used to limit the push-pull plate located inside the cleaning chamber.

[0011] As a further improvement of this utility model, the side wall of the housing where the card slot is located and the side wall of the filter device where the slot is located are located on the same side of the frame.

[0012] As a further improvement of this utility model, the filtration device is provided with a filtration chamber, and a water quality detection probe is installed in the filtration chamber. The water quality detection probe is used to detect the water quality after filtration by the filter screen.

[0013] As a further improvement of this utility model, the frame is also provided with a draining device, which is installed between the aquaculture pond and the cleaning device. The draining device is provided with a draining cavity, and multiple sets of placement racks are provided in the draining cavity. The multiple sets of placement racks are installed sequentially on the bottom surface of the draining device, and each set of placement racks is used to place the cleaned filter screen.

[0014] As a further improvement of this utility model, the draining device is also equipped with an ultraviolet lamp, which is directed toward the draining cavity and used to sterilize the filter screen located in the draining cavity.

[0015] As a further improvement of this utility model, a transfer tank is also provided on the frame. One end of the transfer tank is connected to the outlet of the filtration device, and the other end of the transfer tank is connected to the inlet of the aquaculture pond. Biological packing material is placed in the transfer tank, and the biological packing material is used to carry out nitrification reaction on the water filtered by the filtration device.

[0016] The technical solution provided by this utility model has the following beneficial effects:

[0017] (1) The rice-fish integrated aquaculture device of this utility model achieves independent rice planting and aquaculture by setting up independent aquaculture devices. This independent setup allows for independent control of rice planting conditions and aquatic animal rearing conditions, enabling both to simultaneously achieve their optimal planting / rearing conditions and simultaneously improve the yield and quality of both rice and aquatic animals. Furthermore, the filtration device in the independent aquaculture device can filter the water entering the paddy field, preventing the water from directly entering the aquaculture pond. This further removes pollutants from the water, improving the water quality entering the aquaculture pond and making the treated water more suitable for aquatic animal rearing. This solves the technical problem in existing rice-fish integrated aquaculture systems where water from the paddy field is directly used to raise aquatic animals, making the aquatic animal rearing environment difficult to control.

[0018] (2) The rice-fish integrated aquaculture facility of this utility model is constructed by setting up an inlet ditch, an outlet ditch, and an aquaculture device. The inlet and outlet ditches connect the rice paddy and the aquaculture device, making them independent of each other. This independent setup allows for independent control of both rice planting and aquaculture conditions, enabling both to achieve their optimal planting / breeding conditions simultaneously, thereby improving the yield and quality of rice and aquatic animals. Furthermore, water circulation between the rice paddy and the aquaculture device allows the wastewater from the aquaculture device to provide organic fertilizer for rice growth. Simultaneously, the rice absorbs ammonia nitrogen and nitrite from the water, reducing pollutants and improving water quality. The rice roots also provide oxygen to the water in the aquaculture device, thus providing organic fertilizer for the rice and removing pollutants from the wastewater, thereby simultaneously improving the yield and quality of both aquaculture and rice cultivation. In addition, it allows for effective utilization of water resources, conserving water resources. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of the rice-fish integrated aquaculture system provided by this utility model.

[0020] Figure 2 This is a schematic diagram of the water flow in the rice-fish integrated aquaculture system of this utility model.

[0021] Figure 3 A perspective view of the aquaculture device provided by this utility model.

[0022] Figure 4 The front view of the aquaculture device provided by this utility model.

[0023] Figure 5 A top view of the aquaculture device provided by this utility model.

[0024] Figure 6 This utility model Figure 5 Sectional view along the middle AA.

[0025] Figure 7 This is a schematic diagram of the aquaculture device in this utility model when a filter screen is installed.

[0026] The diagram is labeled as follows: 1. Paddy field; 2. Inlet ditch; 3. Outlet ditch; 4. Aquaculture equipment; 41. Frame; 42. Aquaculture pond; 43. Cleaning device; 431. Shell; 432. Cleaning components; 433. Wastewater collection tank; 434. Cleaning chamber; 435. Slot; 436. Limiting channel; 44. Filter device; 441. Filter screen; 442. Slot; 443. Filter screen plate; 444. Sliding plate; 445. Filter chamber. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] This embodiment provides a rice-fish aquaculture system. Please refer to [link / reference]. Figure 1 and Figure 2The system includes a paddy field 1, an inlet ditch 2, an outlet ditch 3, and an aquaculture device 4. The paddy field 1 is used for rice cultivation. Vertically, the lowest point of the inlet ditch 2 is higher than the highest point of the paddy field 1, and the highest point of the outlet ditch 3 is lower than the lowest point of the paddy field 1. One end of the inlet ditch 2 connects to the tailwater outlet of the aquaculture device 4, and the other end connects to one end of the paddy field 1. The tailwater generated by the aquaculture device 4 is transported to the paddy field 1 via the inlet ditch 2. The tailwater discharged from the aquaculture device 4 provides organic fertilizer for the rice, and the rice also absorbs ammonia nitrogen and nitrite from the tailwater, reducing pollutants and achieving nitrification treatment. One end of the outlet ditch 3 connects to the other end of the paddy field 1, and the other end connects to the inlet of the aquaculture device 4. The tailwater treated in the paddy field 1 is discharged into the outlet ditch 3 and then flows back into the aquaculture device 4. This embodiment utilizes water circulation between the aquaculture device 4 and the paddy field 1 to achieve a mutually beneficial symbiosis between aquaculture and rice cultivation. The wastewater from the aquaculture device 4 provides organic fertilizer for rice growth, while the rice roots provide oxygen to the water in the aquaculture device 4. Simultaneously, the rice absorbs ammonia nitrogen and nitrite from the water, reducing pollutants and improving water quality. This water circulation allows aquaculture and rice cultivation to be independent yet mutually beneficial, thereby simultaneously improving the yield and quality of both aquaculture and rice cultivation. It also achieves effective water resource utilization and conserves water resources.

[0029] It is understood that in this embodiment, by separating aquaculture and rice cultivation, the two are independent of each other. Therefore, in actual cultivation, the time for aquaculture is unrestricted, and the aquaculture device 4 is an independent cultivation system, enabling it to cultivate aquatic animals such as fish, shrimp, crabs, and shellfish according to cultivation needs. The specific species and sizes cultivated in the aquaculture device 4 can be selected according to market demand.

[0030] In this embodiment, we generally cultivate large-sized yellowfin bream and spotted catfish fry. The cultivation cycle for these two fish species is approximately 5 months, typically from June to October. Cultivation during this period allows the fish to be marketed after the cultivation period ends, coinciding with the rice harvest. This effectively utilizes the window of opportunity in rice-shrimp farming; after the fish are raised and the rice is harvested, shrimp can continue to be cultivated in paddy field 1, thus maximizing the utilization of paddy field 1. Furthermore, although this embodiment involves simultaneous aquaculture and rice cultivation, they are independent of each other. This effectively addresses the problem in existing rice-fish symbiotic farming systems where placing fish directly in paddy field 1 results in inconsistent growth conditions for rice and fish, making it impossible to control the water level, temperature, and quality in paddy field 1 to simultaneously suit both rice and fish cultivation. Consequently, in practice, the yield of one type of fish must be sacrificed to achieve the aforementioned symbiotic farming. In this embodiment, although aquaculture and rice cultivation are carried out simultaneously, they are independent of each other. Therefore, some aquaculture conditions in the aquaculture device 4 can be controlled according to the specific type of aquaculture, and some rice cultivation conditions in the paddy field 1 can be controlled according to some conditions in the rice cultivation process, so that both are in the best aquaculture / cultivation conditions, thereby simultaneously improving the yield and quality of aquaculture and rice cultivation.

[0031] In this embodiment, a water pump may also be installed in the paddy field 1. The water pump is installed on the side of the paddy field 1 near the drainage ditch 3 and is used to push the water in the paddy field 1 into the drainage ditch 3.

[0032] Please refer to Figures 3 to 6The aquaculture device 4 includes a frame 41, an aquaculture pond 42, a cleaning device 43, and a filtration device 44. The aquaculture pond 42, cleaning device 43, and filtration device 44 are sequentially installed on the frame 41. The filtration device 44 includes multiple filter screens 441. The inlet of the filtration device 44 is connected to the outlet of the outlet ditch 3. The multiple filter screens 441 are used to filter the water discharged from the outlet ditch 3. The outlet of the filtration device 44 is connected to both the aquaculture pond 42 and the cleaning device 43. The water filtered by the filtration device 44 is transported to both the aquaculture pond 42 and the cleaning device 43. The cleaning device 43 is used to clean the filter screens 441. The cleaning device 43 includes a housing 431, cleaning components 432, and a wastewater collection tank 433. The housing 431 is mounted on the frame 41. A cleaning chamber 434 is provided inside the housing 431, which holds a filter screen 441. The filter screen 441 is placed vertically within the cleaning chamber 434, with the side of the filter screen 441 containing filter residue designated as the upper surface, meaning the lower surface of the filter screen 441 faces the cleaning assembly 432. The cleaning assembly 432 is mounted on the inner wall of the housing 431, with its outlet aligned with the lower surface of the filter screen 441 within the cleaning chamber 434. This allows the cleaning assembly 432 to perform backwashing on the filter screen 441. A wastewater collection tank 433 is mounted on the lower surface of the frame 41 and located directly below the cleaning chamber 434. The projected area of ​​the wastewater collection tank 433 on the frame 41 is larger than the projected area of ​​the cleaning chamber 434 on the frame 41. Both the upper and lower ends of the housing 431 are open structures, and the part of the frame 41 located inside the cleaning chamber 434 is provided with multiple through holes. Each through hole penetrates the frame 41, allowing the through hole to connect the cleaning chamber 434 and the sewage collection tank 433. This enables the sewage after cleaning in the cleaning chamber 434 to flow into the sewage collection tank 433 through the through holes.

[0033] Multiple wheels can be installed under the frame 41, and a push rod can be installed on one side of the frame 41, which can be used to move the entire frame 41. Therefore, in actual operation, the aquaculture device 4 can be moved to the required location according to actual needs.

[0034] In this embodiment, there can be multiple aquaculture ponds 42, all of which are installed on the frame 41. Each aquaculture pond 42 can be connected to the outlet of the filter device 44. By setting up multiple ponds, it is possible to raise multiple different aquatic animals or raise the same type of aquatic animal simultaneously.

[0035] Understandably, the sewage collection tank 433 can be installed on the lower end face of the frame 41 by means of screws. The screw installation method facilitates the disassembly of the sewage collection tank 433 and the treatment of the collected sewage.

[0036] Please refer to Figure 7 The filter device 44 has multiple slots 442, the same number as the filter screens 441. The height of the filter device 44 is defined as the Y-axis, the width as the X-axis, and the length as the Z-axis. The slots 442 are arranged sequentially from top to bottom along the Y-axis. Each filter screen 441 is inserted into its respective slot 442. The slots 442 are positioned along the Z-axis from one side wall of the filter device 44, ensuring the filter screens 441 inserted into them are horizontal. This insertion method facilitates quick installation and removal of the filter screens 441, making cleaning or replacement easier.

[0037] The filter screen 441 includes a filter plate 443 and a push-pull plate 444, with the push-pull plate 444 fixedly installed at one end of the filter plate 443. The filter plate 443 has multiple filter holes. For the filter plate 443 installed in the slot 442, the length of the filter plate 443 in the Z-axis direction is greater than the length of the slot 442, so that after the filter plate 443 is inserted into the slot 442, a section of it extends out of the filter device 44. In actual installation, the side of the filter plate 443 without the push-pull plate 444 is aligned with the slot 442 and inserted into the slot 442. The projected area of ​​the push-pull plate 444 along the movement direction of the slot 442 is greater than the projected area of ​​the filter plate 443 along the movement direction of the slot 442, so that after the filter screen 441 is inserted into the slot 442, the push-pull plate 444 is located outside the filter device 44. Understandably, a handle can be installed on the push-pull plate 444, which facilitates pushing and pulling the entire filter screen 441.

[0038] Please refer to Figure 7A slot 435 and a limiting channel 436 are provided on one side wall of the housing 431. One end of the limiting channel 436 is connected to the cleaning chamber 434, and the other end is connected to the slot 435. For the filter screen 441 installed in the cleaning chamber 434, the width of the limiting channel 436 is equal to the thickness of the filter screen plate 443. The limiting channel 436 is used to limit the filter screen plate 443 so that it will not shake when the cleaning assembly 432 rinses the filter screen plate 443. The length of the slot 435 (i.e., in the X-axis direction) is greater than or equal to the height of the push-pull plate 444, and the width of the slot 435 is greater than or equal to the thickness of the push-pull plate 444. That is, the shape of the slot 435 matches the side shape of the push-pull plate 444, so that the slot 435 can limit the push-pull plate 444. It is understandable that, at the connection between the push-pull plate 444 and the filter plate 443, the area of ​​the push-pull plate 444 is larger than the area of ​​the filter plate 443. In the actual design process, when the slot 435 is set downward along the Y-axis, the bottom surface of the slot 435 is lower than the bottom surface of the housing 431, and the distance from the bottom surface of the slot 435 to the bottom surface of the housing 431 is consistent with the length of the push-pull plate 444 and the extended filter plate 443. This ensures that when the push-pull plate 444 is inserted into the slot 435, the side of the filter plate 443 can contact the bottom surface of the housing 431. Therefore, under the combined action of the slot 435 and the limiting channel 436, the purpose of limiting and fixing the filter 441 can be achieved, ensuring the stability of the filter 441 installed in the cleaning chamber 434.

[0039] In addition, the side wall of the housing 431 is provided with a slot, which connects to the slot 435. The slot and the limiting channel 436 are respectively provided on both sides of the slot 435 along the Z-axis direction. By providing the slot, when the push-pull plate 444 is inserted into the slot 435, it can avoid the handle when the push-pull plate 444 moves up and down along the slot 435.

[0040] In this embodiment, please refer to Figure 7 The side wall of the housing 431 where the slot 435 is located and the side wall of the filter device 44 where the slot 442 is located are on the same side of the frame 41. By setting the slot 435 and the slot 442 on the same side, it is convenient for the operator to quickly place the filter screen 441 pulled out from the filter device 44 into the cleaning chamber 434 to clean the filter screen 441.

[0041] The filter device 44 is also provided with a filter chamber 445, please refer to Figure 6The filter chamber 445 is used to store the water filtered by the filter screen 443. A water quality detection probe can also be installed inside the filter chamber 445 to detect the water quality after filtration. By setting the water quality detection probe, water quality parameters such as pH, ammonia nitrogen content, dissolved oxygen, and temperature in the filtered water can be monitored in real time. These parameters can be used to determine whether the filtered water quality meets the needs of aquatic animals. If the filtered water quality does not meet the requirements, it can be further treated in a transfer tank. If the filtered water meets the requirements, it can be directly pumped from the filter device 44 to the aquaculture pond 42. This ensures that the water entering the aquaculture pond 42 meets the needs of aquaculture, thereby improving the yield and quality of aquaculture.

[0042] In the actual cleaning process, the filter screen 441 can be placed vertically with its lower end facing the water outlet of the cleaning component 432, so that the cleaning component 432 can perform a backwashing operation on the filter screen 441. After rinsing, the filter screen 441 can be rotated 180° and placed in the cleaning chamber 434, with the upper end of the filter screen 441 facing the water outlet of the cleaning component 432. The cleaning component 432 can then clean the upper end of the filter screen 441. Through the above operations, the filter screen 441 can be thoroughly cleaned.

[0043] In this embodiment, a draining device (not shown in the attached drawings) may also be provided on the frame 41. The draining device is installed between the aquaculture pond 42 and the cleaning device 43. The draining device has a draining chamber, and multiple sets of placement racks are provided inside the draining chamber. The multiple sets of placement racks are sequentially installed on the bottom surface of the draining device. The placement racks are used to place the cleaned filter screen 441. The bottom of the draining chamber is also provided with a water outlet, which can be connected to the sewage collection tank 433 through a pipe, so that the water in the draining chamber can flow into the sewage collection tank 433.

[0044] The draining device can also be equipped with an ultraviolet lamp, which is directed toward the draining chamber. The ultraviolet lamp is used to sterilize the filter screen 441 located in the draining chamber.

[0045] In this embodiment, two sets of filter screens 441 can be prepared. One set of filter screens 441 is installed in the filter device 44 for filtration, and the other set of filter screens 441 can be placed in the draining device for backup. When it is necessary to clean the filter screen 441 in the filter device 44, the filter screen 441 to be cleaned can be first pulled out of the filter device 44 and placed in the cleaning device 43. Then, the corresponding filter screen 441 in the draining device can be taken out and inserted into the filter device 44, thereby replacing the filter screen 441. After replacement, the cleaning component 432 is activated to rinse the filter screen 441. The rinsed filter screen 441 can be placed in the draining chamber for draining.

[0046] With the above settings, the filter device 44 can perform filtration operations without stopping, and the filter screen 441 can be cleaned at any time during the filtration process, thereby improving the filtration speed of the entire filter device 44.

[0047] The cleaning assembly 432 may include a cleaning pipe and multiple nozzles. One end of the cleaning pipe is connected to the filter chamber 445, and the other end of the cleaning pipe is connected to the nozzles. The water filtered by the filter chamber 445 can be used to clean the filter screen 441.

[0048] In addition, the cleaning pipe can also be directly connected to external water, allowing external water to clean the filter screen 441. Either of these two methods can be selected according to actual needs.

[0049] It is understandable that a transfer tank (not shown in the attached diagram) may also be installed on the frame 41. The transfer tank is fixedly installed on the frame 41, with one end connected to the outlet of the filter device 44 via a pipe, and the other end connected to the inlet of the aquaculture pond 42 via a pipe. By setting up the transfer tank, the effluent filtered by the filter device 44 can be collected uniformly. Biological packing material can be added to the transfer tank, which is used to carry out nitrification of the water filtered by the filter device 44.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rice-fish aquaculture system, characterized in that, It includes: The paddy field (1), the inlet ditch (2), the outlet ditch (3) and the aquaculture device (4) are respectively connected at both ends of the inlet ditch (2) to the paddy field (1) and the aquaculture device (4). The inlet ditch (2) is used to transport the tailwater of the aquaculture to the paddy field (1). The outlet ditch (3) is connected at both ends of the aquaculture device (4) and the paddy field (1). The outlet ditch (3) is used to transport the water of the paddy field (1) back to the aquaculture device (4). The aquaculture device (4) includes a frame (41), an aquaculture pond (42), a cleaning device (43), and a filtration device (44); the aquaculture pond (42), the cleaning device (43), and the filtration device (44) are sequentially installed on the frame (41); the filtration device (44) includes multiple filter screens (441), the inlet end of the filtration device (44) is connected to the outlet ditch (3), the multiple filter screens (441) are used to filter the water discharged from the outlet ditch (3), the outlet end of the filtration device (44) is connected to the aquaculture pond (42) and the cleaning device (43) respectively, and the water filtered by the filtration device (44) is respectively transported to the aquaculture pond (42) and the cleaning device (43); the cleaning device (43) includes a shell (431), a cleaning component (432), and a sewage collection tank (432). 33) The housing (431) is provided with a cleaning chamber (434) for placing the filter screen (441). The cleaning assembly (432) is installed on the inner wall of the housing (431). The water inlet of the cleaning assembly (432) is connected to the water outlet of the filter device (44). The water outlet of the cleaning assembly (432) is aligned with the filter screen (441) placed in the cleaning chamber (434). The sewage collection tank (433) is installed on the lower end face of the frame (41) and located below the cleaning chamber (434). The frame (41) located in the cleaning chamber (434) is provided with multiple through holes. The multiple through holes are respectively connected to the cleaning chamber (434) and the sewage collection tank (433). The sewage after cleaning the filter screen (441) in the cleaning chamber (434) flows into the sewage collection tank (433) through the through holes.

2. The rice-fish aquaculture system as described in claim 1, characterized in that, The filter device (44) has a number of slots (442) that are the same as the number of filter screens (441). The multiple slots (442) are arranged sequentially from top to bottom along the height direction of the filter device (44), and each filter screen (441) is inserted into each slot (442).

3. The rice-fish aquaculture system as described in claim 2, characterized in that, The filter screen (441) includes a filter screen plate (443) and a push-pull plate (444). The push-pull plate (444) is fixedly installed at one end of the filter screen plate (443). The length of the filter screen plate (443) in the direction of movement of the slot (442) is greater than the length of the slot (442). The projected area of ​​the push-pull plate (444) along the direction of movement of the slot (442) is greater than the projected area of ​​the filter screen plate (443) in the direction of movement of the slot (442). The filter screen (441) is inserted into the slot (442), and the push-pull plate (444) is located outside the filter device (44).

4. The rice-fish aquaculture system as described in claim 1, characterized in that, The filter screen (441) located in the cleaning chamber (434) is vertically arranged, and the lower end face of the filter screen (441) faces the cleaning assembly (432).

5. The rice-fish aquaculture system as described in claim 3, characterized in that, The housing (431) has a slot (435) and a limiting channel (436) on one side wall. One end of the limiting channel (436) is connected to the cleaning chamber (434), and the other end of the limiting channel (436) is connected to the slot (435). The filter screen (441) is located in the cleaning chamber (434). The width of the limiting channel (436) is equal to the thickness of the filter screen plate (443). The length of the slot (435) is equal to the height of the push-pull plate (444).

6. The rice-fish aquaculture system as described in claim 5, characterized in that, The side wall of the housing (431) where the slot (435) is located is on the same side of the frame (41) as the side wall of the filter device (44) where the slot (442) is located.

7. The rice-fish aquaculture system as described in claim 1, characterized in that, The filtration device (44) is provided with a filtration chamber (445), and a water quality detection probe is installed in the filtration chamber (445).

8. The rice-fish aquaculture system as described in claim 1, characterized in that, The frame (41) is also provided with a draining device, which is installed between the aquaculture pond (42) and the cleaning device (43). The draining device is provided with a draining cavity, and multiple sets of placement racks are provided in the draining cavity. The multiple sets of placement racks are installed sequentially on the bottom surface of the draining device, and each set of placement racks is used to place the cleaned filter screen (441).

9. The rice-fish aquaculture system as described in claim 8, characterized in that, The draining device is also equipped with an ultraviolet lamp to sterilize the filter screen (441) inside the draining chamber.

10. The rice-fish aquaculture system as described in claim 1, characterized in that, The frame (41) is also provided with a transfer pool. One end of the transfer pool is connected to the outlet of the filter device (44), and the other end of the transfer pool is connected to the inlet of the aquaculture pond (42). The transfer pool is filled with biological packing material for nitrifying the water filtered by the filter device (44).

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