A nutrient solution supply device suitable for fish-vegetable symbiosis

Abstract

The utility model discloses a kind of nutrient solution supply devices suitable for fish and vegetable symbiosis, it is related to fish and vegetable symbiosis technical field, including nutrient solution storage barrel, mixed water tank, planting groove;The liquid outlet of nutrient solution storage barrel is communicated with first infusion pipeline by solenoid valve, and first infusion pipeline is connected to the nutrient solution inlet of mixed water tank;Mixed water tank is equipped with circulating water inlet and mixed liquid outlet, and is communicated with fish pond and planting groove respectively;Mixed water tank is equipped with motor-driven stirring assembly and pH and EC detection module;Planting groove inner wall is equipped with liquid level sensor.The utility model solves the technical problem that nutrient solution supply lacks real-time monitoring, mixing is uneven, and liquid supplement triggering mechanism is single in the existing fish and vegetable symbiosis system.

Description

Technical Field

[0001] This utility model relates to the field of aquaponics technology, specifically a nutrient solution supply device suitable for aquaponics. Background Technology

[0002] In modern agricultural technology, aquaponics systems are widely studied and applied due to their eco-friendly nature and high resource recycling rate. This system combines aquaculture with plant cultivation, allowing fish excrement to be decomposed by microorganisms and transformed into nutrients absorbable by plants, thus achieving the resource utilization of "wastewater" and an ecological closed loop. However, in practical applications, the nutrient composition of the aquaculture water is significantly affected by factors such as fish species and quantity, feed intake, and water quality fluctuations, often making it difficult to consistently and stably meet the plant's requirements for mineral elements (such as nitrogen, phosphorus, potassium, calcium, and magnesium), pH, and electrical conductivity (EC).

[0003] To maintain the optimal environmental parameters required for plant growth, existing aquaponics systems mostly rely on periodic artificial replenishment of nutrient solutions or the addition of nutrient solutions to the water body via simple timed pump control systems. However, these technologies have significant shortcomings: Firstly, the lack of real-time monitoring of the pH and EC values ​​of the nutrient solution in the planting area during nutrient solution replenishment means that the nutrient solution replenishment cannot be tailored to the actual absorption status of the plants, which may result in excessively high or low concentrations, affecting crop growth. Secondly, the lack of control over the mixing uniformity during the replenishment process results in poor mixing of the nutrient solution and the aquaculture circulating water, which easily leads to uneven concentration distribution. Third, the liquid replenishment triggering mechanism is simplistic and cannot intelligently determine whether liquid replenishment is needed based on the liquid level in the planting area, resulting in resource waste and operational inconvenience.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide a nutrient solution supply device suitable for aquaponics, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a nutrient solution replenishment device suitable for aquaponics systems, including a nutrient solution storage tank, a mixing tank, and a planting trough. The bottom of the nutrient solution storage tank is provided with an outlet, which is connected to a first delivery pipeline via a solenoid valve. The other end of the first delivery pipeline is connected to the nutrient solution inlet of the mixing tank. The mixing tank is provided with a circulating water inlet and a mixed solution outlet. The circulating water inlet is connected to a fish pond via a circulating water pipeline, and the mixed solution outlet is connected to a second delivery pipeline via an outlet pump. The second delivery pipeline is connected to the planting trough. The mixing tank is provided with a stirring assembly and a pH and EC detection module. The stirring assembly includes a motor installed on the mixing tank and a stirring impeller disposed in the mixed solution. A liquid level sensor is provided on the inner wall of the planting trough.

[0007] In one possible implementation, a controller is also included. The controller is electrically connected to the solenoid valve, the stirring assembly, the pH and EC detection module, the dispensing pump, and the liquid level sensor, respectively. The controller is used to control each step of the nutrient solution replenishment process based on the pH value, conductivity, and liquid level of the mixed solution. The controller has preset pH and EC thresholds. If the detection module detects that the mixed solution does not meet the threshold range, the controller controls the solenoid valve to open and replenish the nutrient solution to the mixing tank, and drives the stirring assembly to run to mix the solution.

[0008] In one possible implementation, when the liquid level sensor detects that the liquid level in the planting trough is lower than a set lower limit, the controller controls the discharge pump to start, driving the mixture to be injected into the planting trough through the second delivery pipe.

[0009] In one possible implementation, a return water pump is provided on the circulating water pipeline, which is used to transport the circulating water from the fish pond to the mixing tank.

[0010] In one possible implementation, the bottom of the planting trough is provided with a return port, which is connected to the fish pond or the nutrient solution storage tank via a return pipe, for discharging excess mixture and recycling it.

[0011] In one possible implementation, the return pipe is equipped with a one-way check valve, the inlet of which is connected to the return port of the planting trough and the outlet of which is connected to the fish pond, to prevent liquid backflow.

[0012] In one possible implementation, the controller includes a time logic module for setting the nutrient solution replenishment frequency, stirring duration, and continuous operation time of the outlet pump to achieve periodic or responsive replenishment.

[0013] In one possible implementation, the pH and EC detection module transmits the detection data to the controller at set time intervals. The controller dynamically adjusts the opening duration of the solenoid valve or the stirring speed according to the data change trend to achieve precise concentration control.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a nutrient solution replenishment device for aquaponics systems. By incorporating a nutrient solution storage tank, a mixing tank, a planting trough, and related connecting pipes, it achieves centralized storage, mixing, and targeted delivery of the nutrient solution. The mixing tank is equipped with a stirring component and pH and EC detection modules, facilitating thorough mixing and concentration monitoring of the nutrient solution, thus improving the uniformity and reliability of the replenishment process.

[0015] This invention achieves automatic control of the nutrient solution replenishment process through the electrical connection of the controller with the solenoid valve, stirring assembly, detection module, liquid level sensor, and dispensing pump. This effectively avoids human error and improves the intelligence level of the system operation. When the mixed solution parameters do not meet the preset range or the liquid level in the planting tank is insufficient, it can automatically perform liquid replenishment and stirring operations to ensure the stability of the planting environment.

[0016] Furthermore, a return port is installed at the bottom of the planting trough and connected to the fish pond or storage tank via a return pipe. Combined with a one-way check valve, this enables the orderly recovery and reuse of excess mixed liquid, avoiding resource waste and liquid backflow. The overall structure is rationally designed, with compact connections, and has good adaptability and practicality, making it suitable for the automated management and replenishment control of nutrient solution in aquaponics systems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the stirring assembly structure of this utility model; Figure 3 This is a schematic diagram of the reflux circulating water pipe in this utility model; Figure 4 This is a schematic diagram of the controller framework in this utility model.

[0018] In the diagram: 1. Solenoid valve; 2. First infusion pipeline; 3. Nutrient solution storage tank; 4. Mixing tank; 5. Nutrient solution inlet; 6. Circulating water inlet; 7. Circulating water pipeline; 8. Mixed solution outlet; 9. Outlet pump; 10. Second infusion pipeline; 11. Planting trough; 12. Mixing assembly; 13. Motor; 14. Mixing impeller; 15. pH and EC detection module; 16. Liquid level sensor; 17. Controller; 19. Time logic module; 20. Return water pump; 21. Return port; 22. Return pipeline; 23. One-way check valve. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0020] Please see Figures 1-4This utility model provides a technical solution: a nutrient solution replenishment device suitable for aquaponics systems includes a nutrient solution storage tank 3, a mixing tank 4, and a planting trough 11. The nutrient solution storage tank 3 stores nutrient solution containing specific nutrients. Its bottom has a circular flange outlet, which is connected to a first infusion pipe 2 made of soft or hard material via a sealed connection. A solenoid valve 1 is installed between the outlet and the pipe. The solenoid valve 1 is an energized and de-energized electromagnetic control valve, installed between the outlet and the first infusion pipe 2, controlling whether the nutrient solution flows out. The selection of the solenoid valve 1 must meet acid and alkali resistance and pressure resistance requirements. Its opening pressure and diameter are determined based on the system design flow requirements, and it typically uses 12V or 24V DC control. The other end of the first infusion pipe 2 is connected to the nutrient solution inlet 5 of the mixing tank 4. This inlet 5 is located on the lower part of the side wall of the mixing tank 4 and is connected to the pipe using a threaded or quick-connect interface to ensure stable liquid introduction. The diameter of this inlet should match that of the first infusion pipe 2. The mixing tank 4 has a closed structure and is made of corrosion-resistant plastic or stainless steel. It has a circulating water inlet 6 and a mixed solution outlet 8. The circulating water inlet 6 is located at the top or upper side wall of the mixing tank 4 and is connected to the circulating water pipe 7 from the fish pond via a sealed joint. The circulating water pipe 7 is made of polyethylene or PVC, possessing water pressure resistance and corrosion resistance. Its end is connected to the fish pond return water outlet via a plug-in or welding method to ensure smooth flow of circulating water into the mixing tank 4. The mixing solution outlet 8 is located at the bottom of the mixing tank 4 and is connected to the outlet pump 9 via a sealed joint. The outlet pump 9 is a self-priming or submersible pump, the selection of which is determined according to the required flow rate of the planting trough 11. It has continuous operation capability and anti-dry-burning protection function. The outlet end of the outlet pump 9 is connected to the second delivery pipe 10. The second delivery pipe 10 uses a flexible or rigid pipe of the same specification as the first delivery pipe 2, and its end is directly connected to the top inlet of the planting trough 11 to ensure that the mixing solution is delivered to the planting trough 11. The mixing tank 4 is equipped with a stirring assembly 12, which is used to fully mix the nutrient solution entering the tank with the circulating water of the fish pond. The stirring assembly 12 includes a motor 13 installed on the top of the tank and a stirring impeller 14 connected to the liquid area inside the tank via a shaft. The motor 13 is an adjustable speed DC motor. The stirring impeller 14 adopts a three-bladed or multi-bladed propeller structure, is installed at the end of the motor shaft, and is firmly connected to the motor via a shaft sleeve. The size of the impeller 14 is calculated according to the tank volume and the required stirring intensity to ensure uniform mixing. The mixing tank 4 is also equipped with a pH and EC detection module 15. The detection module 15 includes a pair of electrodes for measuring the conductivity (EC) of the mixture and a glass electrode for measuring the acidity (pH). These probes are installed in the middle or lower part of the inner wall of the mixing tank and are installed by sealing threads or fixing clamps to ensure detection accuracy and probe stability.The planting trough 11 is a rectangular or rectangular liquid container used to hold plant substrate and roots. A liquid level sensor 16, either a float-type or capacitive sensor, is installed on its inner wall near the bottom and middle of the planting trough to detect whether the mixed solution level is below or above a set value. The sensor's installation position and switching threshold are determined based on the water requirements of the planted plants. The sensor's output signal can be used by the control system to determine whether to continue supplying liquid. All components are reliably connected via standard sealed joints or waterproof connectors, forming a continuous structure according to the water flow path. This allows the nutrient solution to be injected from the storage tank into the mixing tank under control, where it mixes with the circulating water in the fishpond under agitation. The mixture is then pumped into the planting trough, with the liquid level providing real-time feedback from the sensor. The entire process ensures a uniform supply of nutrient solution and controllable water level.

[0021] Preferably, the nutrient solution replenishment device suitable for aquaponics systems also includes a controller 17. This controller 17 is electrically connected via wires to a solenoid valve 1, a stirring assembly 12, a pH and EC detection module 15, a liquid outlet pump 9, and a liquid level sensor 16, forming a closed-loop control system. The controller 17 has a program control unit that stores and executes logical judgment processes based on the pH value, conductivity, and liquid level of the planting trough 11 of the mixed solution. When the pH and EC detection module 15 detects that the pH value or conductivity of the mixed solution exceeds a preset threshold range, the controller 17 automatically drives the solenoid valve 1 to open, allowing the nutrient solution in the nutrient solution storage tank 3 to be replenished into the mixing tank 4 through the first infusion pipe 2. Simultaneously, the stirring assembly 12 is activated, and the motor 13 drives the stirring impeller 14 to rotate, achieving thorough mixing of the nutrient solution and circulating water until the pH and EC values ​​return to the threshold range. The threshold values ​​are fixed values ​​that are set in advance. The pH value is usually set to 5.5-6.5, and the electrical conductivity EC value is usually set to 1.2-2.0 mS / cm. These values ​​are set by the grower in the controller interface according to different crop types and growth stages.

[0022] Specifically, when the liquid level sensor 16 detects that the liquid level in the planting trough 11 is lower than the set lower limit, the sensor sends a low liquid level signal to the controller 17. The controller 17 immediately starts the discharge pump 9 based on the received signal, driving the liquid in the mixing tank 4 to flow into the planting trough 11 through the second delivery pipe 10, until the liquid level sensor 16 detects that the liquid level has returned to the normal height. The lower and upper limits of the liquid level are preset in the parameter settings of the controller 17, typically set according to the volume of the planting trough 11 and the type of plant, ensuring that the plant roots are moistened but not waterlogged.

[0023] Specifically, a return water pump 20 is installed on the circulating water pipe 7. The return water pump 20 is installed in the middle of the circulating water pipe 7 or near the end of the fish pond by a fixing clamp. The return water pump 20 is selected as a small-flow submersible pump or centrifugal pump, which has corrosion resistance and waterproof performance, and is used to continuously pump the circulating water in the fish pond into the mixing tank 4. The return water pump 20 can be turned on continuously or the start-up period can be controlled by the controller 17 according to the crop water requirement and the water circulation cycle.

[0024] Specifically, a return port 21 is provided at the bottom of the planting trough 11. The return port 21 is connected to the fish pond or nutrient solution storage tank 3 via a return pipe 22 to realize the discharge and recycling of excess mixed solution. The return port 21 is located at the rear of the bottom plate of the planting trough 11, and uses a threaded interface with a sealing gasket to prevent leakage. The return pipe 22 is made of flexible hose or PVC rigid pipe and is connected to the return inlet of the fish pond or the top replenishment port of the nutrient solution storage tank 3 to form a gravity return or siphon recovery system.

[0025] Specifically, a one-way check valve 23 is installed in the return pipe 22. The check valve 23 uses a plastic shell spring plate structure, with its inlet end connected to the return port 21 of the planting trough 11 and its outlet end connected to the fish pond return port. The function of the check valve 23 is to prevent the fish pond water from flowing back into the planting trough 11 when the water level fluctuates or the pressure changes, ensuring one-way flow in the return process and improving the stability and safety of the system operation.

[0026] Specifically, the controller 17 includes a time logic module 19, which is implemented using a microcontroller or embedded control chip and has timing logic judgment capabilities. The time logic module 19 is used to set the nutrient solution replenishment frequency, stirring duration, and the running time of the dispensing pump 9. These parameters can be manually input through the controller interface or automatically adjusted through preset programs. This module enables multiple periodic replenishments per day or responsive replenishment triggered by sensor status signals, improving the system's intelligence level.

[0027] Specifically, the pH and EC detection module 15 transmits the real-time detected pH and conductivity data to the controller 17 at set time intervals (e.g., every 5 minutes). The controller 17 receives and records the historical data, analyzes the data change trends using internal algorithms, and dynamically judges the trend of mixed solution concentration changes. Based on the analysis results, the controller 17 automatically adjusts the opening time of the solenoid valve 1 or adjusts the speed of the motor 13, thereby achieving precise control of the mixed solution concentration and ensuring that nutrients are always kept within the set range to meet the plant's absorption needs.

[0028] Working Principle: A closed-loop automatic control system enables the mixing, quality control, delivery, and recycling of circulating water and nutrient solution in the fishpond. The device uses a nutrient solution storage tank as the nutrient solution source. The bottom outlet is connected to the nutrient solution inlet of the mixing tank via a solenoid valve and a first delivery pipeline. Simultaneously, a circulating water inlet is located on the top or side of the mixing tank, connecting to the fishpond via a circulating water pipeline. A return water pump is installed in the pipeline to ensure a stable water supply. A mixed solution outlet is located at the bottom of the mixing tank, connecting to an outlet pump and a second delivery pipeline, ultimately leading to the planting trough. The entire system is coordinated by a controller, which is electrically connected to the solenoid valve, outlet pump, stirring assembly, pH and EC detection modules, and level sensor, constructing a multi-parameter feedback intelligent control mechanism.

[0029] During system operation, the return water pump first introduces fishpond water into the mixing tank. If the pH and EC detection modules detect that the pH value or conductivity of the mixed solution deviates from the preset threshold, the controller activates the solenoid valve to automatically replenish the nutrient solution. Subsequently, the stirring assembly is activated, with the motor driving the impeller for efficient mixing until the solution parameters return to the set range. The controller's internal time logic module can also preset the replenishment frequency, stirring time, and outlet pump runtime, enabling periodic maintenance and operational optimization. When the liquid level sensor in the planting trough detects that the liquid level is below the set lower limit, the controller starts the outlet pump to deliver the mixed solution to the planting trough for plant absorption. Once the liquid level returns to normal, the system automatically stops replenishing the solution. Simultaneously, a return port is located at the bottom of the planting trough and connects to the fishpond or storage tank via a return pipe. Combined with a one-way check valve, this allows for the recovery of the mixed solution, preventing backflow and improving resource utilization. By periodically collecting pH and EC detection data and analyzing their trends, the controller can dynamically adjust the solenoid valve opening time and stirring speed to ensure accurate and stable liquid concentration. The entire system achieves closed-loop automatic replenishment, precise control, and efficient circulation.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A nutrient solution supply device suitable for aquaponics, comprising a nutrient solution storage tank (3), a mixing tank (4), and a planting trough (11), characterized in that: The bottom of the nutrient solution storage tank (3) is provided with a liquid outlet, which is connected to the first infusion pipeline (2) through a solenoid valve (1); The other end of the first infusion pipeline (2) is connected to the nutrient solution inlet (5) of the mixing tank (4); The mixing tank (4) is provided with a circulating water inlet (6) and a mixed liquid outlet (8). The circulating water inlet (6) is connected to the fish pond through a circulating water pipe (7). The mixed liquid outlet (8) is connected to a second infusion pipe (10) through an infusion pump (9). The second infusion pipe (10) is connected to the planting trough (11). The mixing tank (4) is equipped with a stirring assembly (12) and a pH and EC detection module (15). The stirring assembly (12) includes a motor (13) installed on the mixing tank (4) and a stirring impeller (14) set in the mixture. The inner wall of the planting trough (11) is equipped with a liquid level sensor (16).

2. The nutrient solution replenishment device according to claim 1, characterized in that: It also includes a controller (17), which is electrically connected to the solenoid valve (1), stirring assembly (12), pH and EC detection module (15), liquid outlet pump (9) and liquid level sensor (16) respectively, and is used to control each step of the nutrient solution replenishment process according to the pH value, conductivity and liquid level of the mixed solution and the planting trough (11); The controller (17) has preset thresholds for pH and EC. If the detection module (15) detects that the mixture does not meet the threshold range, the controller (17) controls the solenoid valve (1) to open and add nutrient solution to the mixing tank (4), and drives the stirring assembly (12) to run to mix the solution.

3. The nutrient solution replenishment device according to claim 1, characterized in that: When the liquid level sensor (16) detects that the liquid level in the planting trough (11) is lower than the set lower limit, the controller (17) controls the liquid pump (9) to start and drive the mixture to be injected into the planting trough (11) through the second liquid delivery pipe (10).

4. The nutrient solution replenishment device according to claim 1, characterized in that: The circulating water pipe (7) is equipped with a return water pump (20), which is used to transport the circulating water of the fish pond to the mixing tank (4).

5. The nutrient solution replenishment device according to claim 1, characterized in that: The bottom of the planting trough (11) is provided with a return port (21), which is connected to the fish pond or the nutrient solution storage tank (3) through a return pipe (22) for discharging excess mixture and recycling.

6. The nutrient solution replenishment device according to claim 5, characterized in that, The return pipe (22) is equipped with a one-way check valve (23). The inlet end of the check valve (23) is connected to the return port (21) of the planting trough (11), and the outlet end is connected to the fish pond to prevent liquid backflow.

7. The nutrient solution replenishment device according to claim 2, characterized in that, The controller (17) is equipped with a time logic module (19) for setting the nutrient solution replenishment frequency, stirring duration and continuous operation time of the liquid pump (9) to achieve periodic or responsive liquid replenishment.

8. The nutrient solution replenishment device according to claim 1, characterized in that, The pH and EC detection module (15) transmits the detection data to the controller (17) at set time intervals. The controller (17) dynamically adjusts the opening time of the solenoid valve (1) or the rotation speed of the stirring component (12) according to the data change trend to achieve precise concentration control.

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