Full-automatic hydroponic solution supply system suitable for vegetable production

Abstract

The utility model relates to a full-automatic hydroponic solution supply system suitable for vegetable production, and belongs to the technical field of greenhouse vegetable production facilities. Comprising a basic frame body, two specific hydroponic tanks, a connecting pipeline, a liquid level sensor and a PLC (Programmable Logic Controller), the two specific hydroponic tanks are a hydroponic tank A and a control hydroponic tank B; a water pump, a filtering and sterilizing facility and a nutrient solution preparation unit are arranged in the water culture tank B, and a liquid outlet and a liquid inlet are formed in the outer part of the water culture tank B; a water outlet of the water pump is directly connected with the top-layer hydroponic tank A through a pipeline; and the liquid level sensor, the electromagnetic valve and the water pump of each hydroponic tank are electrically connected with the PLC logic controller. According to the utility model, an external continuous storage water tank is abandoned, the water culture liquid is fixed in each layer of water culture tank to circularly flow through a layer-by-layer progressive circulation mechanism, the external water tank is not needed, the hardware cost and the occupied space are directly reduced, and the system is particularly suitable for high-density layout of large-scale plant factories.

Description

Technical Field

[0001] This utility model relates to the field of greenhouse vegetable production facilities technology, and in particular to a fully automatic hydroponic solution supply system suitable for vegetable production. Background Technology

[0002] In the field of hydroponic technology for greenhouse vegetable production, the tidal hydroponics method has become the mainstream method because it can balance the oxygen demand and nutrient supply to plant roots. However, existing tidal hydroponic facilities have significant drawbacks: small-scale hydroponic facilities (such as four-layer or three-frame parallel structures) can conceal small hydroponic solution storage tanks, but the vertical hydroponic density is low, making it difficult to achieve high-efficiency production; large-scale vertical hydroponic production facilities require huge hydroponic solution storage tanks because the hydroponic solution in the hydroponic tank needs to be repeatedly replenished and reused during the cycle of supplying nutrients to the roots at high tide and oxygenating the roots at low tide. This results in large-volume, costly, and difficult-to-maintain hydroponic facilities, severely restricting the development of commercial hydroponic production. Therefore, there is an urgent need for a new type of facility that can solve the problem of hydroponic solution replenishment and achieve high-density vertical hydroponics. Utility Model Content

[0003] This utility model provides a fully automated hydroponic solution supply system suitable for vegetable production, which adopts the following technical solution, including:

[0004] Basic frame, two specific hydroponic tanks, connecting pipes, liquid level sensor and PLC logic controller;

[0005] The two specific hydroponic tanks are hydroponic tank A and controlled hydroponic tank B;

[0006] Hydroponic tank A has a water pipe with a solenoid valve extending downwards connected to the bottom side and a liquid level sensor installed at the top. There are multiple hydroponic tanks A, which are arranged in a straight row layer by layer under the support of the basic frame to form a three-dimensional hydroponic space.

[0007] The hydroponic tank B is located at the bottom of the base frame. It is equipped with a water pump, filtration and sterilization facilities, and nutrient solution preparation unit inside. It has an outlet and an inlet on the outside. A liquid level sensor is installed on the top. A solenoid valve is installed at the inlet. The outlet of the water pump is directly connected to the top hydroponic tank A through a pipeline.

[0008] The level sensor, solenoid valve, and water pump controlling hydroponic tank A and hydroponic tank B are all electrically connected to the PLC logic controller.

[0009] Furthermore, the height of the hydroponic tank A is 5-8 cm, and the length of the water pipe extending from its bottom is greater than 30 cm.

[0010] Furthermore, the filtration and sterilization facility includes a purification filter and an ultraviolet sterilization lamp, the ultraviolet sterilization lamp being electrically connected to a PLC logic controller.

[0011] Furthermore, the nutrient solution preparation unit includes a highly concentrated nutrient solution box and a matching pump. The outlet of the matching pump is connected in parallel with the inlet of the hydroponic tank B and is electrically connected to the PLC logic controller. The concentration ratio of the hydroponic solution is realized through PLC control.

[0012] Furthermore, the solenoid valves of the hydroponic tank A are divided into two groups: odd-numbered layers and even-numbered layers, which are connected in parallel to different control ports of the PLC logic controller; the water pump is connected to a separate control port of the PLC logic controller, and the hydroponic solution is circulated layer by layer in the hydroponic tank A through the time control of the PLC program.

[0013] Furthermore, all the level sensors of all hydroponic tanks A are connected in parallel to the signal input port of the PLC logic controller.

[0014] Furthermore, the liquid outlet at the bottom of the hydroponic tank B is connected to a drain pipe via a connecting pipe; the bottom of the base frame is provided with a water inlet pipe, which is connected to the liquid inlet of the hydroponic tank B via a connecting pipe.

[0015] Furthermore, a liquid level alarm is installed at the bottom of the top hydroponic tank A.

[0016] In summary, this utility model has the following beneficial technical effects:

[0017] 1. This utility model eliminates the need for an external continuous water tank. Traditional tidal hydroponic systems rely on large continuous water tanks to store circulating hydroponic solution, resulting in bulky facilities and high costs. This solution uses a layer-by-layer progressive circulation mechanism to keep the hydroponic solution circulating in each layer of the hydroponic tank, eliminating the need for an external water tank, directly reducing hardware costs and space occupation, and is especially suitable for the high-density layout of large-scale plant factories.

[0018] 2. By using standardized hydroponic tanks A in a three-dimensional stack, combined with PLC logic control, cultivation arrays of any size can be formed by horizontal parallel arrangement and vertical stacking, breaking through the scale bottleneck of traditional systems.

[0019] 3. The height of hydroponic tank A is designed to be 5-8 cm, and the length of the water pipe extending from the bottom is greater than 30 cm. While meeting the needs of plant root growth and supplemental lighting, it achieves multi-layer vertical distribution, forming a high-density three-dimensional cultivation space, which significantly increases the yield per unit area.

[0020] 4. The hydroponic tank B is equipped with a built-in highly concentrated nutrient solution box and a matching pump. The concentration ratio is precisely controlled by the PLC to achieve automatic preparation of the hydroponic solution. The hydroponic tank B is also equipped with a built-in purification filter and an ultraviolet sterilization lamp (controlled by the PLC) to automatically complete filtration and sterilization without manual intervention.

[0021] 5. The hydroponic solution can be gradually introduced from the top hydroponic tank A to the bottom hydroponic tank B, with the hydroponic solution in the bottom hydroponic tank B flowing back to the top hydroponic tank A. The hydroponic solution is alternately filled and emptied in each layer of the hydroponic tank, so that the hydroponic plants in each layer of the hydroponic tank can be grown in a "tidal" hydroponic culture. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a fully automatic hydroponic solution supply system for vegetable production, which is a product of this utility model.

[0023] Explanation of reference numerals in the attached diagram: 1. Hydroponic tank A; 2. Control hydroponic tank B; 3. Water pipe; 4. Solenoid valve; 5. Liquid level sensor; 6. Water pump; 7. PLC logic controller; 8. Purification filter screen; 9. Ultraviolet sterilization lamp; 10. Nutrient preparation unit; 11. Drain pipe; 12. Water inlet pipe; 13. Liquid outlet; 14. Liquid inlet; 15. Connecting pipe; 16. Liquid level alarm. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 A specific embodiment of a fully automated hydroponic solution supply system for vegetable production is shown, comprising: a basic frame, two specific hydroponic tanks, connecting pipes, a liquid level sensor 5, and a PLC logic controller 7; the two specific hydroponic tanks are hydroponic tank A1 and control hydroponic tank B2.

[0026] Specifically, the hydroponic trough A1 is 5-8 cm high, with a water pipe 3 extending downwards from the bottom side and equipped with a solenoid valve 4. The length of the water pipe 3 is greater than 30 cm, and a liquid level sensor 5 is installed near the top. There are multiple hydroponic troughs A1, which are arranged in a straight row layer by layer under the support of the basic frame to form a three-dimensional hydroponic space.

[0027] Specifically, a liquid level alarm 16 is installed at the bottom of the top hydroponic tank A1. The liquid level alarm 16 is electrically connected to the PLC logic controller 7. When the liquid level of the hydroponic solution in the top hydroponic tank A1 is too low, the liquid level alarm 16 sends a signal, and the PLC logic controller 7 controls the water pump 6 to start and inject liquid into the top hydroponic tank A1.

[0028] Specifically, an interlayer cycle is used to replace the external storage water tank, reducing the system volume. Liquid level sensors 5 are provided at the tops of the hydroponic tank A1 and the control hydroponic tank B2. In case of a malfunction and the hydroponic liquid overflows, the liquid level sensor 5 is connected to the PLC logic controller 7 to trigger an emergency stop of the system.

[0029] Specifically, the control hydroponic tank B2 is arranged at the bottommost of the basic frame body. Inside, there are a water pump 6, a filtration and sterilization facility, and a nutrient solution preparation unit 10. Outside, there are a liquid outlet 13 and a liquid inlet 14. A liquid level sensor 5 is provided at the top. An electromagnetic valve 4 is installed at the liquid inlet 14. The water outlet of the water pump 6 is directly connected to the top - layer hydroponic tank A1 through a pipeline. The liquid outlet 13 is connected to a drain pipe 11 through a connecting pipe 15; an inlet pipe 12 is provided at the bottom of the basic frame body. The inlet pipe 12 is connected in parallel to the liquid inlet 14 of the hydroponic tank B2 and the outlet of the supporting pump of the nutrient solution preparation unit 10 through a connecting pipe.

[0030] Specifically, the water outlet of the water pump 6 is directly connected to the top - layer hydroponic tank A1 through a pipeline, providing the driving force for the circulation of the hydroponic liquid and being controlled independently by the PLC logic controller 7. The nutrient solution preparation unit 10 consists of a high - concentration nutrient solution box and a supporting pump. The outlet of the supporting pump is connected in parallel to the inlet pipe 12 of the liquid inlet 14. The operation time of the supporting pump is controlled by the PLC logic controller 7 to achieve precise proportioning of the nutrient solution concentration.

[0031] Specifically, all hydroponic tanks are connected through connecting pipelines, and the liquid level sensors 5, electromagnetic valves 4, and water pumps 6 of each hydroponic tank are electrically connected to the PLC logic controller 7. All the liquid level sensors 5 of all hydroponic tanks A1 are connected in parallel to the signal input port of the PLC logic controller 7.

[0032] Specifically, the PLC logic controller 7 is connected to all electromagnetic valves 4, water pumps 6, and liquid level sensors 5 to uniformly control the liquid circulation.

[0033] In other preferred embodiments, a filtration and sterilization facility is provided inside the control hydroponic tank B2. The filtration and sterilization facility includes a purification filter cotton 8 and an ultraviolet sterilization lamp 9. The ultraviolet sterilization lamp 9 is electrically connected to the PLC logic controller 7.

[0034] Specifically, the purification filter cotton 8 is arranged inside the control hydroponic tank B2, at the inlet of the hydroponic liquid circulation, to ensure that the incoming hydroponic liquid can be fully filtered.

[0035] Specifically, the ultraviolet sterilization lamp 9 is electrically connected to the PLC logic controller 7. The opening time, closing time, and sterilization cycle of the ultraviolet sterilization lamp 9 can be precisely controlled through the PLC program. For example, it can be set to turn on regularly every day, or flexibly controlled according to conditions such as the circulation times and usage time of the hydroponic liquid.

[0036] In other preferred embodiments, the solenoid valves 4 of the hydroponic tank A1 are divided into two groups, one with an odd number of layers and the other with an even number of layers, which are connected in parallel to different control ports of the PLC logic controller 7; the water pump 6 is connected to a separate control port of the PLC logic controller 7, and the hydroponic solution is circulated layer by layer in the hydroponic tank A1 through the time control of the PLC program.

[0037] Specifically, the PLC logic controller 7 controls the water pump 6 to supply hydroponic solution to the top hydroponic tank A1. Since the single-layer solenoid valves are connected in series and operate simultaneously, and the double-layer solenoid valves are also connected in series and operate simultaneously, the PLC logic controller 7 controls the opening of the single-layer or even-layer solenoid valves through the PLC program timing, thus realizing the progressive circulation of hydroponic solution from the top layer.

[0038] For example, when the number of hydroponic tanks A1 is 5, a 5-layer three-dimensional structure is formed (such as...). Figure 1 As shown), the top hydroponic tank A1 is the fifth layer (odd-numbered layer). The solenoid valve 4 on the downward-extending water pipe 3 connected to its side is the solenoid valve 4 for the odd-numbered layer. When the water pump 6 fills the top hydroponic tank A1, the liquid level sensor 5 of the top hydroponic tank A1 sends a signal, and the PLC logic controller 7 controls the water pump 6 to shut off. The PLC logic controller 7 controls the solenoid valve 4 of the odd-numbered layer to open, and the hydroponic solution flows into the fourth hydroponic tank A1 (hydroponic tank A with double-numbered solenoid valves). When the fourth hydroponic tank A1 is full of hydroponic solution, the liquid level sensor 5 on it sends a signal, and the PLC logic controller 7 controls the solenoid valve 4 of the odd-numbered layer to close and the solenoid valve 4 of the even-numbered layer to open. The hydroponic solution flows from the fourth hydroponic tank A1 into the third hydroponic tank A1. By repeating the above steps, the opening of the solenoid valves of the odd-numbered layer or the even-numbered layer can be controlled by the PLC program to realize the progressive circulation of hydroponic solution from the top layer.

[0039] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A fully automated hydroponic solution supply system suitable for vegetable production, characterized in that, include: Basic frame, hydroponic tank, connecting pipes, liquid level sensor and PLC logic controller; The hydroponic tanks are hydroponic tank A and controlled hydroponic tank B; Hydroponic tank A has a water pipe with a solenoid valve extending downwards connected to the bottom side and a liquid level sensor installed at the top. There are multiple hydroponic tanks A, which are arranged in a straight row layer by layer under the support of the basic frame to form a three-dimensional hydroponic space. The hydroponic tank B is located at the bottom of the base frame. It is equipped with a water pump, filtration and sterilization facilities, and nutrient solution preparation unit inside. It has an outlet and an inlet on the outside. A liquid level sensor is installed on the top. A solenoid valve is installed at the inlet. The outlet of the water pump is directly connected to the top hydroponic tank A through a pipeline. The level sensor, solenoid valve, and water pump controlling hydroponic tank A and hydroponic tank B are all electrically connected to the PLC logic controller.

2. The fully automated hydroponic solution supply system for vegetable production according to claim 1, characterized in that, The height of the hydroponic tank A is 5-8 cm, and the length of the water pipe extending from its bottom is greater than 30 cm.

3. The fully automated hydroponic solution supply system for vegetable production according to claim 1, characterized in that, The filtration and sterilization facility includes a purification filter and an ultraviolet sterilization lamp, which is electrically connected to a PLC logic controller.

4. The fully automated hydroponic solution supply system for vegetable production according to claim 1, characterized in that, The nutrient solution preparation unit includes a highly concentrated nutrient solution box and a matching pump. The outlet of the matching pump is connected in parallel with the inlet of the hydroponic tank B and is electrically connected to a PLC logic controller. The concentration ratio of the hydroponic solution is realized through PLC control.

5. The fully automated hydroponic solution supply system for vegetable production according to claim 1, characterized in that, The solenoid valves of the hydroponic tank A are divided into two groups: odd-numbered layers and even-numbered layers, which are connected in parallel to different control ports of the PLC logic controller. The water pump is connected to a separate control port of the PLC logic controller, and the hydroponic solution is circulated layer by layer in the hydroponic tank A through the time control of the PLC program.

6. The fully automated hydroponic solution supply system for vegetable production according to claim 1, characterized in that, All level sensors for hydroponic tank A are connected in parallel to the signal input port of the PLC logic controller.

7. The fully automated hydroponic solution supply system for vegetable production according to claim 1, characterized in that, The liquid outlet at the bottom of the hydroponic tank B is connected to a drain pipe via a connecting pipe; the bottom of the base frame is equipped with a water inlet pipe, which is connected to the liquid inlet of the hydroponic tank B via a connecting pipe.

8. The fully automated hydroponic solution supply system for vegetable production according to claim 1, characterized in that, The bottom of the top hydroponic tank A is equipped with a liquid level alarm.

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