Circulating type hydroponic vegetable seedling culture irrigation system

Abstract

The utility model relates to the technical field of vegetable seedling raising irrigation equipment, and discloses a circulating type hydroponic vegetable seedling raising irrigation system which comprises a seedling raising box, the bottom of one side of the seedling raising box is connected with a circulating filtering mechanism in a sliding mode, the outer side of the seedling raising box is fixedly connected with a liquid medicine diluting and spraying mechanism, and the circulating filtering mechanism comprises a liquid storage box. The top of the liquid storage box is fixedly connected to the bottom of the seedling raising box, one end of the seedling raising box is communicated with one end of the liquid storage box, and the through position of the bottom of the seedling raising box is connected with a quick-release filtering assembly in a sliding mode. According to the utility model, the circulating filtering mechanism drives the nutrient solution to flow in the structures such as the circulating pipe, the collecting pipe and the liquid discharge pipe through the circulating pump, and the redundant nutrient solution flows back to the liquid storage tank along the liquid discharge pipe after being subjected to impurity removal through the filter plate, so that the cyclic utilization is realized, thereby not only preventing impurities from influencing the quality of the nutrient solution, but also guiding the liquid to smoothly flow back through the flow guide inclined plate; and stable operation of the system is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of vegetable seedling irrigation equipment, and in particular to a circulating hydroponic vegetable seedling irrigation system. Background Technology

[0002] Hydroponics is a soilless cultivation method that uses an aqueous solution containing the nutrients necessary for plant growth, allowing plant roots to directly absorb nutrients and water. This technology enables precise control of the plant's growth environment, effectively improving crop yield and quality, while also saving land resources and reducing pests and diseases. With the development of modern agriculture, hydroponic vegetable seedling cultivation is receiving increasing attention, playing a crucial role in facility agriculture and providing a high-quality seedling base for large-scale, high-quality vegetable production.

[0003] The hydroponic vegetable seedling irrigation system is a key facility to ensure the smooth progress of hydroponic vegetable seedling cultivation. Its function is to provide suitable water and nutrients for hydroponic vegetable seedlings. The hydroponic vegetable seedling irrigation system mainly consists of components such as a storage tank, a water pump, pipes, and nozzles. The storage tank stores nutrient solution, and the water pump is responsible for transporting the nutrient solution to the pipes. The solution is then precisely sprayed onto the seedling roots through the nozzles. The overall process is that the nutrient solution is pressurized by the water pump from the storage tank, transported through the pipes, and finally evenly irrigated to the seedling area, completing the hydroponic and irrigation cycle.

[0004] In existing hydroponic vegetable seedling irrigation systems, the recycling of nutrient solution presents several problems. During the recycling process, impurities such as seedling debris, root detachment, and other contaminants easily enter the storage tank, directly affecting the quality of the nutrient solution, yet effective filtration measures are lacking. Simultaneously, the liquid return flow lacks proper guidance, resulting in poor circulation and making it difficult to create a stable and suitable growth environment for vegetable seedlings. Therefore, a circulating hydroponic vegetable seedling irrigation system is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a circulating hydroponic vegetable seedling irrigation system, which aims to improve the problem in the existing technology where impurities such as seedling residues and root debris easily enter the storage tank during the nutrient solution circulation process, directly affecting the quality of the nutrient solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A circulating hydroponic vegetable seedling irrigation system includes a seedling box, a circulating filter mechanism slidably connected to the bottom of one side of the seedling box, and a liquid dilution spraying mechanism fixedly connected to the outside of the seedling box.

[0008] The circulating filtration mechanism includes a liquid storage tank, the top of which is fixedly connected to the bottom of the seedling box. The seedling box and the liquid storage tank are connected at one end. A quick-release filter assembly is slidably connected at the bottom of the seedling box. A circulation assembly is fixedly connected to the outside of the seedling box.

[0009] The quick-release filter assembly includes a filter plate, the outer side of which is slidably connected to the inner side of the liquid storage tank, a locking post slidably connected to the inner side of the filter plate, a pull rod fixedly connected to the outer side of the locking post, a return spring fixedly connected to the outer side of the locking post, one end of the return spring away from the locking post being fixedly connected to the inner side of the filter plate, and the outer side of the locking post slidably connected to the inner side of the locking groove of the filter plate.

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

[0011] The drug dilution spraying mechanism includes a spraying frame, with multiple atomizing nozzles fixedly connected to the bottom of the spraying frame, a drug guide tube fixedly connected to the outside of the spraying frame, a drug tank fixedly connected to the outside of the seedling box, a drug pump fixedly connected to the outside of the drug tank, and the inside of the drug pump fixedly connected to the outside of the drug guide tube.

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

[0013] A stirring motor is fixedly connected to the top of the medicine tank, and a stirring rod is fixedly connected to the outside of the output end of the stirring motor. The outside of the stirring rod is rotatably connected to the inside of the medicine tank.

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

[0015] The medicine tank has a medicine inlet cone fixedly connected to the top of its inner side, a connecting block fixedly connected to the inner wall of the medicine tank, a medicine inlet cylinder rotatably connected to the outer side of the connecting block, and a right-angle push rod rotatably connected to the outer side of the output end of the medicine inlet cylinder.

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

[0017] The right-angle push rod is fixedly connected to an opening and closing rotating rod at the end away from the drug feeding cylinder. The outer side of the opening and closing rotating rod is rotatably connected to the outer side of the drug feeding cone. A drug feeding bottom cover is fixedly connected to the outer side of the opening and closing rotating rod. The top of the drug feeding bottom cover is in contact with the bottom of the drug feeding cone.

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

[0019] The circulation assembly includes a seedling plate, with a collection pipe fixedly connected to both ends of the seedling plate. The collection pipe is threaded with a pipe cap at both ends. A circulation pipe is fixedly connected to the outside of one end of the collection pipe. A temperature control box is fixedly connected to the outside of the circulation pipe. A circulation pump is fixedly connected to the outside of the circulation pipe. The outside of the circulation pump is fixedly connected to the outside of the liquid storage tank.

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

[0021] A drain pipe is fixedly connected to the outside of the other end of the collecting pipe, and a drain valve is fixedly connected to the outside of the drain pipe. The outlet of the drain pipe is above the filter plate.

[0022] As a further description of the above technical solution:

[0023] The inner side of the seedling box is fixedly connected to multiple rows of fixing strips, the bottom of the seedling board is fixedly connected to the top of the fixing strips, and the bottom of the inner side of the seedling box is fixedly connected to a guide plate.

[0024] This utility model has the following beneficial effects:

[0025] 1. In this utility model, the circulating filtration mechanism uses a circulating pump to drive the nutrient solution to flow in the circulating pipe, the collecting pipe, the drain pipe and other structures. Excess nutrient solution is filtered of impurities by the filter plate and then flows to the storage tank through the drain pipe, thereby realizing the recycling of nutrient solution. This not only effectively prevents impurities such as seedling leaves and root debris from entering the storage tank and affecting the quality of the nutrient solution, but also guides the liquid to flow back smoothly with the help of the guide plate. At the same time, the temperature of the nutrient solution is regulated by the temperature control box to provide a stable and suitable growth environment for vegetable seedlings.

[0026] 2. In this utility model, the pesticide dilution and spraying mechanism uses a stirring motor to drive a stirring rod to stir, and a drug-feeding cylinder to drive a right-angle push rod to rotate, thereby causing the opening and closing rotating rod and the drug-feeding bottom cover to move, thus controlling the drug feeding. The drug-feeding pump delivers the pesticide solution, which is then sprayed out through the drug-feeding pipe to the atomizing nozzle of the spraying rack. This achieves precise dilution, convenient addition, and uniform spraying of the pesticide solution, ensuring the effectiveness of pest and disease control and fertilization, allowing vegetable seedlings to fully absorb the nutrients from the pesticide solution, improving control efficiency and fertilization uniformity, promoting healthy vegetable growth, and improving seedling quality. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of a circulating hydroponic vegetable seedling irrigation system proposed in this utility model.

[0028] Figure 2 This is a schematic diagram of the structure of the circulating pump in a circulating hydroponic vegetable seedling irrigation system proposed in this utility model;

[0029] Figure 3 This is a schematic diagram of the drain valve of a circulating hydroponic vegetable seedling irrigation system proposed in this utility model;

[0030] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0031] Figure 5 This is a schematic diagram of the structure of the drug delivery pump in a circulating hydroponic vegetable seedling irrigation system proposed in this utility model;

[0032] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0033] Legend:

[0034] 1. Seedling box; 2. Flow guide plate; 3. Liquid storage tank; 4. Filter plate; 5. Fixing strip; 6. Seedling board; 7. Locking column; 8. Pull rod; 9. Return spring; 10. Manifold; 11. Pipe cap; 12. Drain pipe; 13. Drain valve; 14. Circulation pump; 15. Circulation pipe; 16. Temperature control box; 17. Liquid tank; 18. Inlet cone; 19. Connecting fixing block; 20. Inlet cylinder; 21. Right-angle push rod; 22. Opening and closing rotating rod; 23. Inlet bottom cover; 24. Stirring motor; 25. Stirring rod; 26. Drug delivery pump; 27. Drug delivery pipe; 28. Sprayer frame; 29. ​​Atomizing nozzle. Detailed Implementation

[0035] 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.

[0036] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model is provided: a circulating hydroponic vegetable seedling irrigation system, including a seedling box 1, which provides growth space for vegetable seedlings and is also the main place for nutrient solution circulation and pesticide spraying. A circulating filter mechanism is slidably connected to the bottom of one side of the seedling box 1, and a pesticide dilution spraying mechanism is fixedly connected to the outside of the seedling box 1.

[0037] The circulating filtration mechanism includes a storage tank 3, which stores the nutrient solution returned from the seedling box 1 and provides a stable liquid source for the circulating components, playing a buffering and storage role. The top of the storage tank 3 is fixedly connected to the bottom of the seedling box 1, and the seedling box 1 and the storage tank 3 are connected at one end. A quick-release filter component is slidably connected at the bottom connection of the seedling box 1, and a circulating component is fixedly connected to the outside of the seedling box 1.

[0038] The quick-release filter assembly includes a filter plate 4, which filters out impurities carried during the nutrient solution return process, such as seedling debris and root shedding, preventing these impurities from entering the storage tank and affecting the quality of the nutrient solution. The outer side of the filter plate 4 is slidably connected to the inner side of the storage tank 3. A locking post 7 is slidably connected to the inner side of the filter plate 4. The locking post 7, through its cooperation with the locking groove, enables the quick installation and fixation of the filter plate 4. A pull rod 8 is fixedly connected to the outer side of the locking post 7, which allows the operator to manually move the locking post 7. A return spring 9 is fixedly connected to the outer side of the locking post 7. When the pull rod 8 is pulled to move the locking post 7, the return spring 9 is compressed. After the pull rod 8 is released, the return spring 9 automatically resets, allowing the locking post 7 to re-engage in the locking groove, ensuring the quick and stable installation of the filter plate 4. The end of the return spring 9 away from the locking post 7 is fixedly connected to the inner side of the filter plate 4, and the outer side of the locking post 7 is slidably connected to the inner side of the locking groove of the filter plate 4.

[0039] The circulation component includes a seedling board 6, which supports vegetable seedlings, provides support and fixation for their growth, and also serves as one of the channels for nutrient solution circulation. Both ends of the seedling board 6 are fixedly connected to a collecting pipe 10, which collects and distributes the nutrient solution. The nutrient solution delivered by the circulation pipe 15 is evenly distributed to each planting area of ​​the seedling board 6, while excess nutrient solution on the seedling board 6 is collected into a drain pipe 12. Both ends of the collecting pipe 10 are threadedly connected to caps 11, which seal both ends of the collecting pipe 10 to prevent nutrient solution leakage and facilitate the installation and subsequent maintenance and cleaning of the collecting pipe 10. A circulation pipe 15 is fixedly connected to the outside of one end of the collecting pipe 10, which delivers the nutrient solution from the storage tank 3 to the collecting pipe 10, achieving nutrient solution circulation and providing sufficient nutrients for the vegetable seedlings.

[0040] A temperature control box 16 is fixedly connected to the outside of the circulation pipe 15. The temperature control box 16 regulates the temperature of the nutrient solution to keep it within a suitable range for the growth of vegetable seedlings, thereby improving the growth quality and efficiency of vegetable seedlings. A circulation pump 14 is fixedly connected to the outside of the circulation pipe 15. The circulation pump 14 provides power for the flow of nutrient solution in the circulation pipe 15, enabling the nutrient solution to circulate between the seedling box 1, the storage tank 3, and the circulation pipe 15. The outside of the circulation pump 14 is fixedly connected to the outside of the storage tank 3.

[0041] The outer side of the other end of the collection pipe 10 is fixedly connected to the drain pipe 12. The drain pipe 12 discharges the excess nutrient solution on the seedling plate 6 into the storage tank 3 to realize the recycling of nutrient solution. The outer side of the drain pipe 12 is fixedly connected to the drain valve 13. The drain valve 13 controls the discharge flow rate and time of the nutrient solution in the drain pipe 12 and adjusts the circulation balance of nutrient solution between the seedling box 1 and the storage tank 3. The outlet of the drain pipe 12 is above the filter plate 4.

[0042] The inner side of the seedling box 1 is fixedly connected to multiple rows of fixing strips 5, which support and fix the seedling board 6, so that the seedling board 6 maintains a stable position in the seedling box 1, which facilitates the cultivation and management of vegetable seedlings. The bottom of the seedling board 6 is fixedly connected to the top of the fixing strips 5. The bottom of the inner side of the seedling box 1 is fixedly connected to a guide plate 2, which guides the nutrient solution and the return liquid in the seedling box 1 to flow smoothly to the circulation filter mechanism, preventing the liquid from accumulating in the seedling box 1 and ensuring the circulation of the nutrient solution.

[0043] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 The pesticide dilution and spraying mechanism includes a spray frame 28, which supports and fixes atomizing nozzles 29 to evenly spray the diluted pesticide solution onto vegetable seedlings for pest and disease control and fertilization. Multiple atomizing nozzles 29 are fixedly connected to the bottom of the spray frame 28, atomizing the pesticide solution into fine particles for even spraying onto the vegetable seedlings, improving the coverage area and absorption effect. A pesticide guide tube 27 is fixedly connected to the outside of the spray frame 28, connecting to the pesticide solution tank. 17 and spray rack 28 transport the liquid medicine from liquid medicine tank 17 to atomizing nozzle 29. Liquid medicine tank 17 is fixedly connected to the outside of seedling box 1. Liquid medicine tank 17 stores liquid medicine and dilutes and stirs the liquid medicine to ensure the uniformity and stability of the liquid medicine. Drug delivery pump 26 is fixedly connected to the outside of liquid medicine tank 17. Drug delivery pump 26 provides power for the flow of liquid medicine in drug delivery tube 27 and transports liquid medicine from liquid medicine tank 17 to spray rack 28. The inside of drug delivery pump 26 is fixedly connected to the outside of drug delivery tube 27.

[0044] A stirring motor 24 is fixedly connected to the top of the medicine tank 17, which drives the stirring rod 25 to rotate and stir the medicine in the medicine tank 17, so that the medicine and water are fully mixed and uniformly diluted. The stirring rod 25 is fixedly connected to the outside of the output end of the stirring motor 24. The stirring rod 25 rotates under the drive of the stirring motor 24 to stir the medicine and make the medicine evenly mixed. The outside of the stirring rod 25 is rotatably connected to the inside of the medicine tank 17.

[0045] A medicine inlet cone 18 is fixedly connected to the top inner side of the medicine tank 17. The medicine inlet cone 18 facilitates the addition of medicine liquid or powder and guides the medicine liquid to flow smoothly into the medicine tank 17. A connecting block 19 is fixedly connected to the inner wall of the medicine tank 17. The connecting block 19 fixes the medicine inlet cylinder 20 and the right-angle push rod 21 and other components, providing installation support for the medicine inlet control mechanism. The medicine inlet cylinder 20 is rotatably connected to the outer side of the connecting block 19. The medicine inlet cylinder 20 drives the right-angle push rod 21 to rotate through the extension and retraction of the output end, thereby controlling the opening and closing of the medicine inlet bottom cover 23 and realizing automatic control of medicine liquid addition. The right-angle push rod 21 is rotatably connected to the outer side of the output end of the medicine inlet cylinder 20. The right-angle push rod 21 rotates under the drive of the medicine inlet cylinder 20, driving the opening and closing rotating rod 22 and the medicine inlet bottom cover 23 to move, thereby realizing the opening and closing control of the medicine inlet cone 18.

[0046] The end of the right-angle push rod 21 away from the drug-feeding cylinder 20 is fixedly connected to an opening and closing rotating rod 22. The opening and closing rotating rod 22 rotates under the drive of the right-angle push rod 21, controlling the opening and closing of the drug-feeding bottom cover 23 to realize the addition control of the drug liquid. The outer side of the opening and closing rotating rod 22 is rotatably connected to the outer side of the drug-feeding cone 18. The drug-feeding bottom cover 23 is fixedly connected to the outer side of the opening and closing rotating rod 22. The drug-feeding bottom cover 23 covers the bottom of the drug-feeding cone 18. The addition of the drug liquid is controlled by opening and closing to prevent foreign matter from entering the drug liquid tank 17. The top of the drug-feeding bottom cover 23 is in contact with the bottom of the drug-feeding cone 18.

[0047] Working principle: When the circulating hydroponic vegetable seedling irrigation system starts to operate, the vegetable seedlings are placed in the planting area of ​​the seedling plate 6, and the cultivation work begins. First, the circulation pump 14 is turned on, and the circulation pump 14 draws out the nutrient solution from the storage tank 3 and pushes the nutrient solution to flow along the circulation pipe 15. When the nutrient solution reaches the collection pipe 10, the collection pipe 10 distributes the nutrient solution evenly to each planting area of ​​the seedling plate 6. These nutrient solutions are rich in various nutrients required for the growth of vegetable seedlings, providing a material basis for the vigorous growth of seedlings.

[0048] As the vegetable seedlings absorb the nutrient solution and the system operates, excess nutrient solution will be generated on the seedling plate 6. This excess nutrient solution will be collected along the collection pipe 10 and discharged into the drain pipe 12. The drain valve 13 controls the flow rate and time of the nutrient solution discharged from the drain pipe 12 to the storage tank 3 according to the system settings. During the discharge process, the nutrient solution will first pass through the filter plate 4. The filter plate 4 can effectively intercept and remove impurities such as seedling residues and root debris mixed in the nutrient solution, thereby ensuring that the nutrient solution returning to the storage tank 3 remains clean and realizing the recycling of the nutrient solution. At the same time, the guide plate 2 at the bottom of the inner side of the seedling box 1 can guide the nutrient solution and return liquid in the seedling box 1 to flow smoothly to the storage tank 3 due to its tilt angle. In addition, the temperature control box 16 is equipped with a temperature sensor and a corresponding temperature control device. It will monitor the temperature of the nutrient solution in the circulation pipe 15 in real time and automatically adjust the temperature according to the suitable temperature range for vegetable seedling growth to ensure that the temperature of the nutrient solution is always within the appropriate range.

[0049] When the filter plate 4 needs to be disassembled, cleaned, or replaced after long-term use, first pull the pull rod 8 inward. The sliding of the pull rod 8 overcomes the elastic force of the return spring 9, causing the pull rod 8 to drive the locking column 7 to disengage from the locking groove of the liquid storage tank 3, thereby realizing the quick disassembly of the filter plate 4. After cleaning the filter plate 4, align the filter plate 4 with the sliding groove of the liquid storage tank 3. When the filter plate 4 slides to the appropriate position, the locking column 7 resets under the elastic force of the return spring 9 and re-locks into the locking groove of the liquid storage tank 3, completing the installation and quick replacement.

[0050] When it is necessary to carry out pest and disease control or fertilization operations on vegetable seedlings, the stirring motor 24 is started, which drives the stirring rod 25 to rotate in the liquid tank 17. Through the rotation of the stirring rod 25, the liquid and water in the liquid tank 17 are fully mixed to achieve a uniform dilution effect. When adding liquid or powder, the inlet cylinder 20 drives the right-angle push rod 21 to rotate through the extension and retraction movement, which in turn causes the opening and closing rotating rod 22 and the inlet bottom cover 23 to move, opening the inlet cone 18. After the addition operation is completed, the inlet cone 18 is closed. Then, the delivery pump 26 is started, which delivers the prepared liquid in the liquid tank 17 to the spray frame 28 through the delivery pipe 27. The atomizing nozzle 29 at the bottom of the spray frame 28 atomizes the liquid into fine particles and sprays them evenly onto the vegetable seedlings, thereby achieving pest and disease control or nutrient supplementation for the vegetable seedlings.

[0051] 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 circulating hydroponic vegetable seedling irrigation system, comprising a seedling box (1), characterized in that: A circulating filter mechanism is slidably connected to the bottom of one side of the seedling box (1), and a liquid dilution spraying mechanism is fixedly connected to the outside of the seedling box (1). The circulating filtration mechanism includes a liquid storage tank (3), the top of which is fixedly connected to the bottom of the seedling box (1), the seedling box (1) and the liquid storage tank (3) are connected at one end, a quick-release filter assembly is slidably connected at the bottom of the seedling box (1), and a circulation assembly is fixedly connected to the outside of the seedling box (1). The quick-release filter assembly includes a filter plate (4), the outer side of which is slidably connected to the inner side of the liquid storage tank (3), the inner side of which is slidably connected to a locking post (7), the outer side of which is fixedly connected to a pull rod (8), the outer side of which is fixedly connected to a return spring (9), the end of which is away from the locking post (7) is fixedly connected to the inner side of the filter plate (4), and the outer side of which is slidably connected to the inner side of the locking groove of the filter plate (4).

2. The circulating hydroponic vegetable seedling irrigation system according to claim 1, characterized in that: The drug dilution spraying mechanism includes a spraying frame (28), with multiple atomizing nozzles (29) fixedly connected to the bottom of the spraying frame (28), a drug guide tube (27) fixedly connected to the outside of the spraying frame (28), a drug tank (17) fixedly connected to the outside of the seedling box (1), a drug pump (26) fixedly connected to the outside of the drug tank (17), and the inside of the drug pump (26) fixedly connected to the outside of the drug guide tube (27).

3. The circulating hydroponic vegetable seedling irrigation system according to claim 2, characterized in that: A stirring motor (24) is fixedly connected to the top of the medicine tank (17), and a stirring rod (25) is fixedly connected to the outer side of the output end of the stirring motor (24). The outer side of the stirring rod (25) is rotatably connected to the inner side of the medicine tank (17).

4. The circulating hydroponic vegetable seedling irrigation system according to claim 2, characterized in that: The medicine tank (17) has a medicine inlet cone (18) fixedly connected to the top of its inner side, a connecting block (19) fixedly connected to the inner wall of the medicine tank (17), a medicine inlet cylinder (20) rotatably connected to the outer side of the connecting block (19), and a right-angle push rod (21) rotatably connected to the outer side of the output end of the medicine inlet cylinder (20).

5. The circulating hydroponic vegetable seedling irrigation system according to claim 4, characterized in that: The right-angle push rod (21) is fixedly connected to an opening and closing rotating rod (22) at the end away from the drug feeding cylinder (20). The outer side of the opening and closing rotating rod (22) is rotatably connected to the outer side of the drug feeding cone (18). The outer side of the opening and closing rotating rod (22) is fixedly connected to a drug feeding bottom cover (23). The top of the drug feeding bottom cover (23) is in contact with the bottom of the drug feeding cone (18).

6. The circulating hydroponic vegetable seedling irrigation system according to claim 1, characterized in that: The circulation assembly includes a seedling plate (6), with a collection pipe (10) fixedly connected to both ends of the seedling plate (6). The collection pipe (10) is threaded with a pipe cap (11) at both ends. A circulation pipe (15) is fixedly connected to the outside of one end of the collection pipe (10). A temperature control box (16) is fixedly connected to the outside of the circulation pipe (15). A circulation pump (14) is fixedly connected to the outside of the circulation pipe (15). The outside of the circulation pump (14) is fixedly connected to the outside of the liquid storage tank (3).

7. A circulating hydroponic vegetable seedling irrigation system according to claim 6, characterized in that: A drain pipe (12) is fixedly connected to the outside of the other end of the collecting pipe (10), and a drain valve (13) is fixedly connected to the outside of the drain pipe (12). The outlet of the drain pipe (12) is above the filter plate (4).

8. A circulating hydroponic vegetable seedling irrigation system according to claim 6, characterized in that: The inner side of the seedling box (1) is fixedly connected to multiple rows of fixing strips (5), the bottom of the seedling board (6) is fixedly connected to the top of the fixing strips (5), and the bottom of the inner side of the seedling box (1) is fixedly connected to a guide plate (2).

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