Multi-layer water circulation pool device for temporary breeding of freshwater fish

Abstract

The utility model relates to fish culture equipment technical field discloses a multilayer formula water circulation pool equipment for freshwater fish interim culture, including support, the top and inboard bottom of support all are fixedly connected with pool body, the inboard bottom of two pool bodies all is provided with oxygenation mechanism, the bottom right side of two pool bodies all is provided with filter mechanism, the top left side front of support is provided with sterilization mechanism, the sterilization mechanism is used for the disinfection of fish pond, the bottom right side of two pool bodies all is provided with sewage treatment mechanism, the sewage treatment mechanism is used for cleaning the sludge accumulation, the front side of two pool bodies all is provided with observation mechanism, the sewage treatment mechanism includes two baffle. In the utility model, the top sludge falls to the filter frame and is stopped by the filter screen to realize separation, opens the electromagnetic valve to discharge pool water after plugging back the baffle, the cleaning work of isolation type, avoid producing local strong water flow to disturb fish, guarantee the normal growth and interim culture quality of fish.

Description

Technical Field

[0001] This utility model relates to the field of fish farming equipment technology, and in particular to a multi-layer water circulation tank for temporary holding of freshwater fish. Background Technology

[0002] Freshwater fish ponds are artificial water facilities used for raising freshwater fish. They are made of earth, concrete, or plastic and can be built indoors or outdoors. They require control of water quality, temperature, and dissolved oxygen levels, and are equipped with filtration and aeration equipment. They are used for aquaculture and ornamental fish cultivation, and can centrally manage fish growth, improve aquaculture efficiency, and are important sites for freshwater fishery production.

[0003] The multi-layer water circulation tank equipment for freshwater fish can make efficient use of space and increase the temporary holding capacity per unit area. The water circulation device can purify water quality, recycle water resources, reduce pollution and waste, and at the same time facilitate the control of environmental parameters such as water temperature and dissolved oxygen, extend the survival time of fish, and reduce mortality. It is especially suitable for market and transportation temporary holding scenarios, taking into account both environmental protection and economic benefits.

[0004] During the use of freshwater fish holding ponds, the physical filtration components can become clogged with uneaten food and feces. If not cleaned in time, this can lead to poor water flow, a significant decrease in filtration capacity, and an impact on water purification. In existing technologies, a conical bottom and drain outlet are designed at the bottom of the fish pond, combined with a timed sludge pump to directly discharge the large amount of uneaten food and feces deposited at the bottom of the pond, preventing them from entering the filtration structure with the water flow. This can alleviate the problem of filtration efficiency decline. However, in actual use, the strong local water flow generated when the sludge pump is working can disturb the fish, causing them to jump and collide with the pond walls due to stress, resulting in damage to their bodies and affecting the normal growth of the fish and the quality of their temporary holding. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-layer water circulation tank for temporary holding of freshwater fish, aiming to improve the problem in the prior art where the local strong water flow generated by the suction pump during operation disturbs the fish, causing them to jump and collide with the tank wall due to stress, resulting in damage to their body surface and affecting the normal growth and temporary holding quality of the fish.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-layer water circulation tank device for temporary holding of freshwater fish, including a support frame, with tank bodies fixedly connected to the top and bottom inner sides of the support frame, an oxygenation mechanism provided at the bottom inner sides of both tank bodies, a filtration mechanism provided at the bottom right side of both tank bodies, a disinfection mechanism provided at the front left side of the top of the support frame for disinfecting the fish tank, a sewage discharge mechanism provided at the bottom right side of both tank bodies for cleaning accumulated sludge, and an observation mechanism provided at the front side of both tank bodies;

[0007] The sewage discharge mechanism includes two baffles, the left sides of which are slidably connected to the right sides of the two pools respectively. Rubber strips are fixedly connected to the front and rear sides of the two baffles. Filter frames are slidably connected to the bottom right side of the two pools. Filter screens are fixedly connected to the inner sides of the two filter frames. Sealing rings are fixedly connected to the outer sides of the two filter frames. Sliding components are provided on the front and rear sides of the two filter frames.

[0008] As a further description of the above technical solution:

[0009] The disinfection mechanism includes a medicine box, the bottom of which is fixedly connected to the front left side of the top of the support, and a delivery pump is fixedly connected to the right side of the medicine box. The top and front of the delivery pump are connected to water distribution pipes, and drip tubes are fixedly connected to the top left of the inner sides of the two pools.

[0010] As a further description of the above technical solution:

[0011] The sliding assembly includes multiple slide bars, which are fixedly connected to the front and rear sides of the two filter frames respectively. Multiple sliding grooves are provided on the right side of both pools.

[0012] As a further description of the above technical solution:

[0013] The observation mechanism includes two sealing strips, the bottoms of which are fixedly connected to the inner front sides of the two pools, and observation windows are fixedly connected to the inner sides of both sealing strips.

[0014] As a further description of the above technical solution:

[0015] The filtration mechanism includes two filter boxes, the tops of which are fixedly connected to the bottom right side of the two pools respectively. Filter cartridges are slidably connected to the inner sides of both filter boxes. A circulation component is provided on the front side of each of the two filter boxes, and a temperature control component is provided on the front side of each of the two circulation components.

[0016] As a further description of the above technical solution:

[0017] Both circulation components include solenoid valves, the rear sides of which are fixedly connected to the front sides of the two filter boxes, and a water pump is fixedly connected to the front side of each of the two solenoid valves.

[0018] As a further description of the above technical solution:

[0019] Both temperature control components include a temperature controller, the rear of the two temperature controllers are fixedly connected to the front of the two water pumps, and a temperature sensor is fixedly connected to the right side of each of the two solenoid valves.

[0020] As a further description of the above technical solution:

[0021] The oxygenation mechanism includes multiple air stone strips, the bottoms of which are fixedly connected to the front and rear ends of the inner bottom of the two pools, and an air pump is fixedly connected to the left side of the bottom of each of the two pools.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the baffles of each pool can be pulled out and inserted back to control the discharge of sludge and water. The filter frame collects sludge and residue. When a portion of the baffle is pulled out, the top sludge falls onto the filter frame and is blocked by the filter screen to achieve separation. After the baffle is inserted back, the solenoid valve is opened to discharge some water, reducing the amount of water to be treated. The isolated cleaning work avoids the generation of strong local water flow that may disturb the fish, ensuring the normal growth of the fish and the quality of temporary holding.

[0024] 2. In this utility model, the disinfectant is placed in a medicine box and delivered to the drip tube by a delivery pump to realize the preparation and delivery of the disinfectant. The bottom of the medicine box is fixed on the bracket to ensure stable installation. The delivery pump on the right provides power for the delivery of the medicine. The water distribution pipe connected to the delivery pump transmits the prepared medicine to realize the diversion and delivery. The drip tube at the top of the inner side of the pool drips the medicine into the pool, so that the medicine is evenly dispersed in the water to complete the disinfection operation. Attached Figure Description

[0025] Figure 1 This is a perspective view of a multi-layer water circulation tank device for temporary holding of freshwater fish proposed in this utility model.

[0026] Figure 2 This is a front view of a multi-layer water circulation tank device for temporary holding of freshwater fish proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the filtration mechanism in a multi-layer water circulation tank for temporary holding of freshwater fish proposed in this utility model.

[0028] Figure 4 This is a cross-sectional view of the tank body in a multi-layer water circulation tank device for temporary holding of freshwater fish proposed in this utility model;

[0029] Figure 5 This is an exploded view of the observation mechanism in a multi-layer water circulation tank device for temporary holding of freshwater fish proposed in this utility model.

[0030] Legend:

[0031] 1. Support frame; 2. Pool body; 3. Sewage discharge mechanism; 301. Baffle; 302. Rubber strip; 303. Filter frame; 304. Filter screen; 305. Sealing ring; 306. Sliding assembly; 3061. Sliding strip; 3062. Sliding groove; 4. Disinfection mechanism; 401. Chemical box; 402. Transfer pump; 403. Water distribution pipe; 404. Drip pipe; 5. Observation mechanism; 501. Sealing strip; 502. Observation window; 6. Filtration mechanism; 601. Filter box; 602. Filter cartridge; 603. Circulation assembly; 6031. Solenoid valve; 6032. Water pump; 604. Temperature control assembly; 6041. Temperature controller; 6042. Temperature sensor; 7. Aeration mechanism; 701. Air stone strip; 702. Air pump. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model provides a multi-layer water circulation tank device for temporary holding of freshwater fish, including a support 1, which supports the entire mechanism. The top and bottom inner sides of the support 1 are fixedly connected to the tank body 2. The bottom inner sides of the two tank bodies 2 are provided with an oxygenation mechanism 7. The bottom right side of the two tank bodies 2 is provided with a filtration mechanism 6. The front left side of the top of the support 1 is provided with a disinfection mechanism 4, which is used for disinfecting the fish tank. The bottom right side of the two tank bodies 2 is provided with a sewage discharge mechanism 3, which is used to clean up the accumulated sludge. The front side of the two tank bodies 2 is provided with an observation mechanism 5.

[0034] The sewage discharge mechanism 3 includes two baffles 301, which can be pulled out and retracted. The left sides of the two baffles 301 are slidably connected to the right sides of the two pool bodies 2, respectively. Rubber strips 302 are fixedly connected to the front and rear sides of the two baffles 301, filling the gaps between the baffles 301 and the pool bodies 2. Filter frames 303 are slidably connected to the bottom right side of the two pool bodies 2. The filter frames 303 are used to collect sludge and residue. Filter screens 304 are fixedly connected to the inner sides of the two filter frames 303, and sealing rings 305 are fixedly connected to the outer sides of the two filter frames 303, filling the gaps between the filter frames 303 and the pool bodies 2. The baffles 301 can be partially pulled out. The sludge on top of the baffle 301 falls into the filter frame 303 and is blocked by the filter screen 304. The baffle 301 is pushed back in, the solenoid valve 6031 is opened, and the water in the bottom of the baffle 301 and the filter frame 303 is discharged. The filter frame 303 is pulled out and the collected sludge is processed. Sliding components 306 are provided on the front and rear sides of the two filter frames 303. The sliding components 306 include multiple sliding strips 3061. The multiple sliding strips 3061 are fixedly connected to the front and rear sides of the two filter frames 303 respectively. Multiple sliding grooves 3062 are opened on the right side of the two pools 2. The sliding strips 3061 and the sliding grooves 3062 form a sliding relationship, which facilitates the extraction of the filter frame 303.

[0035] Specifically, the support frame 1 supports the entire structure and provides installation support. The top and bottom inner sides of the support frame 1 are fixedly connected to the pool body 2, forming a temporary fish holding space. The bottom inner sides of both pool bodies 2 are equipped with an oxygenation mechanism 7 to increase the dissolved oxygen in the water. The bottom right side of both pool bodies 2 is equipped with a filtration mechanism 6 to filter and purify the discharged water. The front left side of the top of the support frame 1 is equipped with a disinfection mechanism 4, which is used to disinfect the fish pond and kill bacteria in the water. The bottom right side of both pool bodies 2 is equipped with a sewage discharge mechanism 3, which is used to clean up the accumulated sludge and keep the pond clean. The front side of both pool bodies 2 is equipped with an observation mechanism 5 to facilitate observation of the fish's condition in the pond.

[0036] The sewage discharge mechanism 3 includes two baffles 301, which can be pulled out and retracted to control the discharge of sludge and water. The left sides of the two baffles 301 are slidably connected to the right sides of the two pool bodies 2, ensuring smooth movement of the baffles 301. Rubber strips 302 are fixedly connected to the front and rear sides of the two baffles 301, filling the gaps between the baffles 301 and the pool bodies 2 to enhance sealing. Filter frames 303 are slidably connected to the bottom right side of the two pool bodies 2. The filter frames 303 are used to collect sludge and residue, achieving centralized sludge collection. The inner sides of the two filter frames 303 are fixedly connected to... The filter screen 304 filters sludge and residue from the water. The outer sides of the two filter frames 303 are fixedly connected with sealing rings 305. The sealing rings 305 fill the gap between the filter frame 303 and the tank body 2 to prevent sludge leakage. When the baffle 301 is pulled out, the sludge on the top of the baffle 301 falls into the filter frame 303 and is blocked by the filter screen 304, thus achieving sludge separation. The baffle 301 is pushed back, and the solenoid valve 6031 is opened to drain the water from the bottom of the baffle 301 and the filter frame 303, reducing the amount of water used for sludge treatment. The filter frame 303 is then pulled out to process the collected sludge for easy cleaning.

[0037] Sliding components 306 are provided on the front and rear sides of both filter frames 303 to assist the filter frames 303 in being pulled out smoothly. The sliding components 306 include multiple slide bars 3061, which are fixedly connected to the front and rear sides of the two filter frames 303 respectively to provide sliding guidance. Multiple sliding grooves 3062 are provided on the right side of both pool bodies 2. The slide bars 3061 and the sliding grooves 3062 form a sliding relationship, which facilitates the removal of the filter frames 303 and reduces the difficulty of operation.

[0038] Reference Figure 1 and Figure 2 The disinfection mechanism 4 includes a medicine box 401. Disinfectant is placed in the medicine box 401. After the medicine is stirred and diluted in the medicine box 401, it is delivered to the drip tube 404 by the delivery pump 402. The bottom of the medicine box 401 is fixedly connected to the front left side of the top of the support 1. The delivery pump 402 is fixedly connected to the right side of the medicine box 401. The top and front of the delivery pump 402 are connected to the water distribution pipe 403. The water distribution pipe 403 transmits the prepared medicine. The top left side of the inner side of the two pools 2 is fixedly connected to the drip tube 404. The drip tube 404 drips the medicine into the pool 2.

[0039] Specifically, the disinfectant is placed in the reagent box 401. After the reagent is stirred and diluted in the reagent box 401, it is delivered to the dropper 404 through the delivery pump 402, thereby realizing the preparation and delivery of the disinfectant. The bottom of the reagent box 401 is fixedly connected to the front left side of the top of the bracket 1 to ensure that the reagent box 401 is installed stably. The delivery pump 402 is fixedly connected to the right side of the reagent box 401 to provide power for the delivery of the reagent. The top and front of the delivery pump 402 are connected to the water distribution pipe 403, which transmits the prepared reagent to realize the diversion and delivery of the reagent. The dropper 404 is fixedly connected to the top left of the inner side of both pools 2. The dropper 404 drips the reagent into the pool 2, so that the reagent is evenly dispersed in the water in the pool 2.

[0040] Reference Figure 1 , Figure 3 and Figure 5 The filtration mechanism 6 includes two filter boxes 601. Each filter box 601 has an opening at the top and receives an opening on the bottom right side of the tank body 2. The tops of the two filter boxes 601 are fixedly connected to the bottom right sides of the two tank bodies 2. Filter cartridges 602 are slidably connected to the inner sides of each filter box 601. The filter cartridges 602 further filter fine impurities and can be removed from the filter boxes 601 for cleaning. A circulation assembly 603 is provided on the front side of each filter box 601. Each circulation assembly 603 includes a solenoid valve 6031, which controls the water flow from the filter box 601. The rear sides of the two solenoid valves 6031 are fixedly connected to the two filter boxes. On the front side of 601, water pumps 6032 are fixedly connected to the front sides of two solenoid valves 6031. Water pumps 6032 pump filtered water. Temperature control components 604 are provided on the front sides of two circulation components 603. Each temperature control component 604 includes a temperature controller 6041. Water pumped by water pumps 6032 passes through temperature controllers 6041. Temperature controllers 6041 can heat and cool the water. The rear sides of the two temperature controllers 6041 are fixedly connected to the front sides of the two water pumps 6032 respectively. Temperature sensors 6042 are fixedly connected to the right side of the two solenoid valves 6031. Temperature sensors 6042 are inserted into the solenoid valves 6031. When the water flows, the water temperature can be detected.

[0041] Specifically, the top opening of the filter box 601 receives the bottom right opening of the pool body 2 to receive the water discharged from the pool body 2. The tops of the two filter boxes 601 are fixedly connected to the bottom right of the two pool bodies 2 respectively to ensure that the filter boxes 601 are installed firmly. The inner side of the two filter boxes 601 is slidably connected to the filter element 602. The filter element 602 filters out fine impurities again to improve the cleanliness of the water. The filter element 602 can be pulled out of the filter box 601 for cleaning, which is convenient for maintenance and replacement.

[0042] The circulation component 603 realizes the recycling of filtered water. Both circulation components 603 include a solenoid valve 6031. The solenoid valve 6031 controls the water flow out of the filter box 601 to realize the on-off control of water flow. The rear side of the two solenoid valves 6031 is fixedly connected to the front side of the two filter boxes 601 to ensure reliable connection. The front side of the two solenoid valves 6031 is fixedly connected to a water pump 6032. The water pump 6032 pumps the filtered water to provide power for water circulation.

[0043] The temperature control component 604 regulates the temperature of the circulating water. Both temperature control components 604 include a temperature controller 6041. The water pumped by the water pump 6032 passes through the temperature controller 6041. The temperature controller 6041 can heat and cool the water to make the water temperature suitable for the survival needs of fish. The rear of the two temperature controllers 6041 are fixedly connected to the front of the two water pumps 6032 to ensure stable installation. Temperature sensors 6042 are fixedly connected to the right side of the two solenoid valves 6031. The temperature sensors 6042 are inserted into the solenoid valves 6031. When the water flows, the water temperature can be detected, which is convenient for real-time monitoring of the water temperature status.

[0044] Reference Figure 1 , Figure 3 and Figure 4 The observation mechanism 5 includes two sealing strips 501, which are used to fill the gap between the observation window 502 and the pool body 2. The bottom of the two sealing strips 501 is fixedly connected to the inner front end of the two pool bodies 2 respectively. The inner side of the two sealing strips 501 is fixedly connected to the observation window 502, which facilitates side observation of the interior of the pool body 2. The oxygenation mechanism 7 includes multiple air stone strips 701. The bottom of the multiple air stone strips 701 is fixedly connected to the front and rear ends of the bottom of the inner side of the two pool bodies 2 respectively. The bottom left side of the two pool bodies 2 is fixedly connected to an air pump 702, which delivers oxygen to the air stone strips 701. The oxygen is dispersed and emitted from the holes of the air stone strips 701.

[0045] Specifically, the sealing strip 501 is used to fill the gap between the observation window 502 and the pool body 2, enhancing the sealing of the connection. The bottoms of the two sealing strips 501 are fixedly connected to the inner front of the two pool bodies 2 to ensure that the sealing strips 501 are installed firmly. The inner sides of the two sealing strips 501 are fixedly connected to the observation windows 502, which facilitate side observation of the interior of the pool body 2 and real-time monitoring of the fish's activity. The aeration mechanism 7 includes multiple air stone strips 701. The bottoms of the multiple air stone strips 701 are fixedly connected to the front and rear ends of the inner bottom of the two pool bodies 2, providing a carrier for oxygen dispersion. The bottom left side of the two pool bodies 2 is fixedly connected to an air pump 702, which delivers oxygen to the air stone strips 701 to provide an air source for aeration. Oxygen is dispersed and emitted from the holes of the air stone strips 701, increasing the dissolved oxygen in the water and meeting the breathing needs of the fish.

[0046] Working principle: Freshwater fish are placed in the pool body 2 at the top and bottom of the support 1. The fish's condition inside the pool body 2 can be observed from the side through the observation window 502 of the observation mechanism 5. The sealing strip 501 fills the gap between the observation window 502 and the pool body 2 to enhance the sealing. The oxygenation mechanism 7 is activated, and the air pump 702 delivers oxygen to the air stone strip 701 at the bottom of the inner side of the pool body 2. The oxygen is dispersed and emitted from the holes of the air stone strip 701, increasing the dissolved oxygen content of the water.

[0047] When disinfection is required, the disinfectant is placed into the agent box 401 of the disinfection mechanism 4. After the agent box 401 is stirred and diluted, it is delivered by the delivery pump 402 through the water distribution pipe 403 to the drip pipe 404. The drip pipe 404 drips the disinfectant into the pool body 2 to achieve disinfection. The water in the pool body 2 flows into the filter box 601 of the filtration mechanism 6 through the bottom right opening. The filter chamber 602 filters out fine impurities. The filter chamber 602 can be pulled out for cleaning. When the solenoid valve 6031 is opened, the water pump 6032 sends the filtered water to the temperature controller 6041. The temperature controller 6041 heats and cools the water. The temperature sensor 6042 detects the water temperature. The treated water can be circulated back to the pool body 2.

[0048] When cleaning the sludge, a portion of the baffle 301 of the sewage discharge mechanism 3 is pulled out, and the top sludge falls into the filter frame 303 and is blocked by the filter screen 304. After the baffle 301 is pushed back, the solenoid valve 6031 is opened to discharge some water. The filter frame 303 is pulled out to process the sludge through the sliding relationship between the slide bar 3061 and the slide groove 3062. The rubber strip 302 and the sealing ring 305 enhance the sealing performance, realizing the temporary holding of freshwater fish and water circulation treatment.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 multi-layer water circulation tank for temporary holding of freshwater fish, comprising a support frame (1), characterized in that: The top and inner bottom of the support (1) are fixedly connected to the pool body (2). The inner bottom of the two pool bodies (2) are provided with an oxygenation mechanism (7). The bottom right side of the two pool bodies (2) is provided with a filtration mechanism (6). The front left side of the top of the support (1) is provided with a disinfection mechanism (4). The disinfection mechanism (4) is used for disinfecting the fish pond. The bottom right side of the two pool bodies (2) is provided with a sewage discharge mechanism (3). The sewage discharge mechanism (3) is used to clean up the accumulated sludge. The front side of the two pool bodies (2) is provided with an observation mechanism (5). The sewage discharge mechanism (3) includes two baffles (301). The left sides of the two baffles (301) are slidably connected to the right sides of the two pools (2). Rubber strips (302) are fixedly connected to the front and rear sides of the two baffles (301). Filter frames (303) are slidably connected to the bottom right side of the two pools (2). Filter screens (304) are fixedly connected to the inner side of the two filter frames (303). Sealing rings (305) are fixedly connected to the outer side of the two filter frames (303). Sliding components (306) are provided on the front and rear sides of the two filter frames (303).

2. The multi-layer water circulation tank equipment for temporary holding of freshwater fish according to claim 1, characterized in that: The disinfection mechanism (4) includes a medicine box (401), the bottom of which is fixedly connected to the front left side of the top of the support (1), and a delivery pump (402) is fixedly connected to the right side of the medicine box (401). The top and front of the delivery pump (402) are connected to a water distribution pipe (403), and the top left side of the inner side of the two pools (2) are fixedly connected to a drip tube (404).

3. The multi-layer water circulation tank equipment for temporary holding of freshwater fish according to claim 1, characterized in that: The sliding component (306) includes multiple slide bars (3061), which are fixedly connected to the front and rear sides of the two filter frames (303) respectively. Multiple sliding grooves (3062) are provided on the right side of the two pool bodies (2).

4. The multi-layer water circulation tank equipment for temporary holding of freshwater fish according to claim 1, characterized in that: The observation mechanism (5) includes two sealing strips (501), the bottoms of the two sealing strips (501) are fixedly connected to the inner front end of the two pool bodies (2), and observation windows (502) are fixedly connected to the inner side of each of the two sealing strips (501).

5. The multi-layer water circulation tank equipment for temporary holding of freshwater fish according to claim 1, characterized in that: The filtration mechanism (6) includes two filter boxes (601). The tops of the two filter boxes (601) are fixedly connected to the bottom right side of the two pools (2). Filter cartridges (602) are slidably connected to the inner sides of the two filter boxes (601). A circulation component (603) is provided on the front side of the two filter boxes (601). A temperature control component (604) is provided on the front side of the two circulation components (603).

6. A multi-layer water circulation tank for temporary holding of freshwater fish according to claim 5, characterized in that: Both circulation components (603) include solenoid valves (6031), the rear sides of the two solenoid valves (6031) are respectively fixedly connected to the front sides of the two filter boxes (601), and water pumps (6032) are fixedly connected to the front sides of the two solenoid valves (6031).

7. A multi-layer water circulation tank for temporary holding of freshwater fish according to claim 6, characterized in that: Both temperature control components (604) include a temperature controller (6041), the rear side of the two temperature controllers (6041) is fixedly connected to the front side of the two water pumps (6032), and a temperature sensor (6042) is fixedly connected to the right side of the two solenoid valves (6031).

8. A multi-layer water circulation tank for temporary holding of freshwater fish according to claim 1, characterized in that: The oxygenation mechanism (7) includes multiple air stone strips (701), the bottoms of which are fixedly connected to the front and rear ends of the inner bottom of the two pool bodies (2), and air pumps (702) are fixedly connected to the left side of the bottom of the two pool bodies (2).

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